巴西专利BR112014028422B1 can end

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TIN END. The present invention relates to a can end (10) which has an audience side (34) and an opposite product side (35). A circumferential undulation (14) is located on a central axis (50) and defines an external perimeter of the can end (10). A circumferential wall (15) extends downwards from the undulation (14). A circumferential countersunk depression, usually U-shaped (16), extends radially into the circumferential wall (15), in relation to the central axis (50) and upwards. A central panel (12) extends radially inward from the countersunk depression (16) in relation to the central axis (50) and has a displaceable tear panel (20) defined by the frangible streak (22) and a segment of hinge (25) on the public side (34) and a flap (26) repaired on the public side (34) which has a nose portion (30) superimposed on a portion of the displaceable tear panel (20). A circumferential panel joins the countersunk depression (16) with the central panel (12) and has a first panel radius (76) joined to a second panel radius (80) by a short wall (84) that extends upwards and inside. The circumferential panel has a rim (92) formed therein.
公开号:BR112014028422B1
申请号:R112014028422-9
申请日:2013-05-14
公开日:2020-12-01
发明作者:Randall G. Forrest；Michael R. Gogola
申请人:Rexam Beverage Can Company；
IPC主号:

专利说明:

TECHNICAL FIELD
[001] The present invention relates to beverage can end wraps and converted can ends; more particularly, the present invention relates to the can end produced from a down calibrated blank without adversely affecting the strength of the can end. BACKGROUND OF THE INVENTION
[002] Common end closures for beer and beverage containers have a center panel that has a frangible panel (sometimes called a "tear panel", "opening panel" or "leak panel") defined by a streak formed on the outer surface, the "public side" of the end closure. The ends of "ecology" cans can be designed to provide a way to open the end by fracturing the streaked metal on the panel, while not allowing any part of the end to separate. For example, the most common of such a beverage container end has a tear panel that is retained at the end by an unstreaked hinge region that joins the tear panel to the rest of the end, with a rivet for joining a force flap. lever provided to open the tear panel. This type of container end, typically called a "stay-on-tab" ("SOT") end, has a tear panel that is defined by an incomplete circular shaped streak, where the unstreaked segment serves as a fragment of retaining metal on the hinge line of the tear panel offset.
[003] The container is typically a drawn and smoothed metal can, normally constructed from a thin sheet of aluminum. End closures for such containers are also typically constructed from a cutting edge of thin aluminum or steel sheet, formed as a rough end, and manufactured as a finished end by a process often referred to as end conversion . These ends are formed in the process of first forming a thin metal cutting edge, forming a blank from the cutting edge, and converting the blank into an end closure that can be spliced to a container. Although not currently a popular alternative, such containers and / or the ends can be constructed of plastic material, with a similar construction of non-detachable parts provided for openness.
[004] These types of container ends of the "stay-on-tab" ecology have been used for many years, with a retained flap and a tear panel of various different shapes and sizes. Throughout the use of such ends, manufacturers sought to save metal costs by calibrating the metal of the ends and flaps down. However, due to the fact that the ends are used for containers with pressurized contents and are sometimes subjected to pasteurization, there are conditions that cause great stress to the end components during pasteurization, transit and during opening by a user. These conditions limit the reduction in available gauge of the end metal, and make it difficult to change characteristics of the end design, such as by reducing the gauge of the metal or the thickness of the residual metal in the streak that defines the tear panel.
[005] The pressurized contents of the container often cause a risk for the tip to warp. Pressurized content can also result in a condition where the flap is forced upwards. There is a maximum allowable distance that the flap can be moved without the flap extending upward above the rest of the container. This is called a tab-over-chime tab. The flap over the rim leads to abuse problems in transport where the frangible panel breaks prematurely during the distribution of filled beverage containers.
[006] As manufacturers reduce the thickness of the metal used to make the ends, deformation and the flap over the edge become more and more of a problem. Therefore, there is a need for a can end with greater capacity to withstand deformation and the flap over the edge.
[007] Finished can ends, also referred to as refurbished or converted can ends, are available in many sizes. The different sizes are generally identified as 200, 202, 206 and 209. The sizes are different, in part, by their respective diameters. The can end 200 is the smallest, and 209 is the largest.
A can end similar to that described in U.S. Patent no. 7,819,275, which is incorporated by reference into the present invention as if it were fully disclosed in the present invention, has gained some commercial acceptance. A can wrap illustrated in FIG. 13 of the '275 patent includes a circular central panel connected to a short beveled angled panel wall. The sloped or beveled panel wall has straight internal and external surfaces and extends at an acute angle, and connects them through a vertical wall with an inclined internal wall of a countersunk depression, which has a general cross-section configuration in general. U-shaped. The countersunk depression has an inclined outer wall and connects it with a nozzle wall that has an inclined or curved upper wall portion and an inclined lower wall portion. An upper portion of the nozzle wall connected to an inner wall portion of a crown has a curved outer wall.
[009] The can end wrap shown in FIG. 13 of the '275 patent is generally formed of an aluminum foil having a thickness of about 0.0082 inches. When produced from thick aluminum starting material such as this, the spliced can end notably exhibits an appropriate resistance to deformation. The configuration and relative shallow profile of the can wrap also results in a seamed can end that has an overall height of less than 0.240 inch, thereby providing for a reduction of more than 0.040 inch in the diameter of the circular blank that is used to form the wrap. This reduction in diameter notably results in a significant reduction in the width of the aluminum foil used to produce the wraps, thereby a reduction in the weight and cost of the aluminum to form the can ends.
[0010] US Patent Publication 201110297679 copending and assigned to the same assignee as published on December 8, 2011, which is incorporated by reference in the present invention as if it were fully disclosed in the present invention, describes ends or lids of cans for two-piece metal drink cans produced from a reduced volume of metal, mainly a blank of a reduced thickness. The can ends of the '434 patent application are generally 209 can ends of a size that have a diameter of at least 60 mm, more likely about 70 mm or a little less than 70 mm, and about 65 mm when spliced to the body of a can.
[0011] It is desirable to produce a can end that is produced from a metal blank that is less than 0.0082 inch thick while maintaining adequate deformation resistance of an additional 100 psi.
[0012] In general, the wrappers of can ends, that is, those produced in a wrapping press, will exhibit dimensional variability, especially in the area of countersunk depression. This is believed to be caused by the orientation of the grains in the metal, mainly aluminum alloy blanks used to produce the can ends. In this way, from can end wrap to can end wrap, the dimensions will be reasonably consistent. However, with regard to the countersunk depression of a single can end wrap, the dimensions will vary. Otherwise indicated, the variability of the interlayered end wrap will generally be low, whereas the variability of the intralate end wrap can be relatively high.
[0013] A converted or finished can end produced from a can end wrap which exhibits the inconsistency or variability described above can lead to difficulty in double splicing of the converted can end to the body of a can because the seam introduced inside the public side of the can end during the seam will not fit within the countersunk depression exactly the same around the circumference of the can end. Therefore, the circumferential double splice can become undesirably variable or susceptible to failure.
[0014] The present invention is provided to solve the problems discussed above and other problems, and to provide advantages and aspects not provided by previous ends or can lids of this type. A full discussion of the features and advantages of the present invention is postponed to the following detailed description, which proceeds with reference to the accompanying drawings. SUMMARY OF THE INVENTION
[0015] A first aspect of the present invention concerns a can end. The can end comprises one side of the public and one side of the opposite product. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. A circumferential countersunk depression, usually U-shaped, extends radially inward from the circumferential wall in relation to the central axis and upward. A central panel extends radially inward from the countersunk depression in relation to the central axis and comprises a movable tear panel defined by a frangible streak and a hinge segment on the public side and a flap attached to the public side that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel. The circumferential panel comprises a first radius of the panel joined to a second radius of the panel by a short wall which extends upwards and inwards. The circumferential panel has an edge formed thereon.
[0016] The first aspect of the invention may comprise one or more of the following characteristics, alone or in any reasonable combination. The can end can also comprise a first convex curvature in relation to the public side and a second convex curvature in relation to the public side in the short wall where the rim is located between them. The rim can be located in the short wall. The rim can be defined by a formation at the can end where the deformation of the public side and the product side is substantially uniform, such that the public side and the product side remain substantially parallel throughout the structure of the rim. The can end can also comprise a convex curvature in relation to the side of the public located between the rim and the first radius of the panel. The can end can also comprise a convex curvature with respect to the public side located between the rim and the second radius of the panel. The short wall can extend upward and radially inward with respect to the central axis at an angle between about 15 ° and 75 ° as measured from a vertical axis, and the first radius of the panel can have a first wedged segment formed in it. The can end can also comprise a second die-formed segment formed on the second radius of the panel. The first radius of the panel can be directly connected to the countersunk depression, and the second radius of the panel can be directly connected to an outer peripheral edge of the central panel.
[0017] A second aspect of the invention concerns a can end. The can end has a public side and an opposite product side in which a thickness of the can end measured between the public side and the product side is less than 0.0082 inch. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. The circumferential countersunk depression, usually U-shaped, extends radially into the circumferential wall in relation to the central axis and upwards. A central panel extends radially inward from the countersunk depression in relation to the central axis and comprises a movable tear panel defined by a frangible streak and a hinge segment on the public side and a flap fixed on the side of the public that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel and has a first panel radius and a second panel radius. The circumferential panel has one or more elements formed therefrom which additional material locally originates from which a substantially vertical, radially internal wall of the countersunk depression is formed which is of sufficient length that the can end exhibits greater resistance to deformation. than or equal to 100 psi.
[0018] The second aspect of the invention may comprise one or more of the following elements, alone or in any reasonable combination. The circumferential panel may have a lower point and a higher point where an angle of a straight line drawn from the lowest point to the highest point is between 30 ° and 60 ° as measured from a vertical axis. A segment of the circumferential panel between the first and second points is on the straight line. A first element can be a concave edge relative to the public side. The element may be a segment of the first radius of the panel or the second radius of the panel. The circumferential panel may have a lower point and a higher point where an angle of a straight line drawn from the lowest point to the highest point is about 45 ° and where a segment of the circumferential panel between the first and the second point is on the straight line.
[0019] A third aspect of the invention concerns a can end. The can end comprises an audience side and an opposing side of the product. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. A circumferential countersunk depression, usually U-shaped, extends radially into the circumferential wall in relation to the central axis and upwards. A central panel extends radially inward from the countersunk depression in relation to the central axis and comprises a movable tear panel defined by a frangible streak and a hinge segment on the public side and a flap attached to the public side that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel and has a rim formed therein. The rim comprises a first segment that extends radially inward with respect to the central axis and downwardly from an outermost radial portion of the circumferential panel. The rim can be defined by a formation at the can end where the deformation of the public side and the product side are substantially uniform, in such a way that the public side and the product side remain substantially parallel throughout the structure of the rim.
[0020] The third aspect of the invention may comprise one or more of the following elements, alone or in any reasonable combination. The can end can also comprise a convex curvature with respect to the public side located between the countersunk depression and the rim. The can end can also comprise a convex curvature in relation to the public side located between the rim and an external periphery of the central panel. The rim can be defined by a formation at the can end where the deformation of the public side and the product side are substantially uniform, in such a way that the public side and the product side remain substantially parallel throughout the structure of the rim.
[0021] A fourth aspect of the present invention concerns a can end. The can end comprises an audience side and an opposite product side in which a thickness of the can end measured between the public side and the product side is less than 0.0082 inch. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. A circumferential countersunk depression, usually U-shaped, extends radially into the circumferential wall in relation to the central axis and upwards. A central panel extends radially inward from the countersunk depression in relation to the central axis and comprises a movable tear panel defined by a frangible streak and a hinge segment on the public side and a flap attached to the public side that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel and has a first radius of the panel joined to a second radius of the panel in which the circumferential panel has a lower point and a higher point at which an angle of a straight line drawn from the The lowest point of the highest point is between about 30 ° and 60 ° as measured from a vertical axis and where a segment of the circumferential panel between the first and second points is in the straight line. The circumferential panel has an element formed therefrom that provides additional material of the thickness from which a substantially vertical radially internal wall of the countersunk depression is formed in which the element comprises a convex curvature in relation to the public side.
[0022] A fifth aspect of the present invention relates to a can end. The can end has an audience side and an opposite product side. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. A circumferential countersunk, generally U-shaped depression extends radially inward from the circumferential wall in relation to the central axis and upward. A central panel extends radially inward from the countersunk depression in relation to the central axis and comprises a movable tear panel defined by a frangible streak and a hinge segment on the public side and a flap attached to the public side that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel that has a first panel radius joined to a second panel radius by a short wall that has a first segment that extends radially inwards with respect to the central axis, a second segment that it comprises a concave curvature in relation to the public side and a third segment that extends upwards and radially inwards in relation to the central axis.
[0023] A sixth aspect of the present invention relates to a can end. The can end has an audience side and an opposite product side. A circumferential undulation is located around a central axis and defines an outer perimeter of the can end. A circumferential wall extends downward from the undulation. A circumferential countersunk depression, usually U-shaped, extends radially into the circumferential wall in relation to the central axis and upwards. A central panel extends radially inward from the countersunk depression in relation to the central axis and has a movable tear panel defined by a frangible streak and a segment of the hinge on the public side and a flap fixed on the side of the public that has a nose portion superimposed on a portion of the displaceable tear panel. A circumferential panel joins the countersunk depression with the central panel and has a rim formed therein. The flange comprises a first segment that extends radially inwards with respect to the central axis and downwards from a more upper portion of the circumferential panel.
[0024] Other features and advantages of the invention will be apparent from the following specification taken together with the following drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] To understand the present invention, it will now be described by means of examples, with reference to the accompanying drawings, in which:
[0026] FIG. 1 is a top view of a converted can end;
[0027] FIG. 2 is a cross-sectional view of the converted can end of FIG. 1;
[0028] FIG. 3 is a cross-sectional view of a can end wrap;
[0029] FIG. 4 is a partial cross-sectional view of a can end, a wrap or a converted can end;
[0030] FIG. 5 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and reduced angle;
[0031] FIG. 6 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, i.e., an inner wall of a can end, a wrap or a converted can end reformed from a countersunk U-shaped depression that has an increased length / height and a reduced angle and an element formed in a circumferential panel comprising a wedged segment of the circumferential panel;
[0032] FIG. 7 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and an angle and an element formed in a circumferential panel comprising a wedged segment of the circumferential panel in an alternative position with respect to the can end of FIG. 6;
[0033] FIG. 8 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and an element formed in a circumferential panel comprising a wedged segment of the circumferential panel in an alternative position with respect to the can ends of FIGS. 6 and 7;
[0034] FIG. 9 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and an element formed in a circumferential panel comprising a wedged segment of the circumferential panel in an alternative position with respect to the can ends of FIGS. 6-8;
[0035] FIG. 10 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and an element formed in a circumferential panel comprising an edge formed in the circumferential panel;
[0036] FIG. 11 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and reduced angle and an element formed in a circumferential panel comprising a rim formed in the circumferential panel in an alternative position with respect to the can end of FIG. 10;
[0037] FIG. 12 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and an element formed in a circumferential panel comprising an edge formed in the circumferential panel in an alternative position with respect to the can ends of FIGS. 10 and 11;
[0038] FIG. 13 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed on a circumferential panel comprising wedged segments and edges formed on the circumferential panel;
[0039] FIG. 14 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a wedged segment and a rim formed in the circumferential panel;
[0040] FIG. 15 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and reduced angle and a plurality of elements formed in a circumferential panel comprising a wedge segment and a rim formed in the circumferential panel in alternative positions with respect to the can end of FIG. 14;
[0041] FIG. 16 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a wedge segment and a rim formed in the circumferential panel in alternative positions with respect to the can ends of FIGS. 14 and 15;
[0042] FIG. 17 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and reduced angle and a plurality of elements formed in a circumferential panel comprising a wedged segment and an edge formed in the circumferential panel in separate positions distinct from the circumferential panel;
[0043] FIG. 18 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a wedge segment and a rim formed in the circumferential panel in separate positions distinct from the cir-circumferential panel and in alternative positions with respect to the can end of FIG. 17;
[0044] FIG. 19 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, an inner wall reformed from a countersunk U-shaped depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a plurality of wedged segments and an edge formed in separate positions distinct from the circumferential panel;
[0045] FIG. 20 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a wedge segment and a rim formed in the circumferential panel in separate positions distinct from the cir-circumferential panel;
[0046] FIG. 21 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed on a circumferential panel comprising a plurality of wedged segments and an edge formed on the circumferential panel in separate positions distinct from the circumferential panel;
[0047] FIG. 22 is a partial cross-sectional view of a can end, a wrap or a converted can end that illustrates an aspect of the present invention, that is, a reformed inner wall of a U-shaped countersunk depression that has a length / increased height and a reduced angle and a plurality of elements formed in a circumferential panel comprising a plurality of wedged segments and an edge formed in separate positions distinct from the circumferential panel;
[0048] FIG. 23 is a partial cross-sectional view of a can end reformed in dashed lines and an unreformed can end wrap in solid lines that illustrate an aspect of the present invention, that is, an reformed internal wall of a countersunk shaped depression of U which has an increased length / height and a reduced angle; the circumferential panel also exhibits a reduced angle in relation to the unreformed wall end wrap;
[0049] FIG. 24 is a partial cross-sectional view of a can end reformed in dashed lines and an unreformed can end wrap in solid lines that illustrate an aspect of the present invention, namely a countersunk U-shaped depression reformed to tighten or decrease the radii of curvature of the radially internal and radially external annular portions of the countersunk depression. DETAILED DESCRIPTION
[0050] Although the present invention is susceptible of modalities in many different forms, it is shown in the drawings and the preferred modalities of the invention will be described in detail here with the understanding that the present descriptions should be considered as exemplifications of the principles of the invention and not serve to limit the broad aspect of the invention to the illustrated modalities.
[0051] With reference to the figures, can ends, converted can ends 10 and can end wraps 100 are illustrated. Can ends for beverage containers are typically constructed from a cutting edge of a thin plate of aluminum or steel, formed in a blank, and manufactured as a finished end by a process often referred to as end conversion. In the embodiments shown in the figures, a center or center panel 12 is joined to a container by a splice ripple 14 that is joined to a coupling ripple of a container. The splice groove 14 of the end closure 10 is integral with the center panel 12 by a downward extending wall 15 and a reinforcement member 16, typically a countersunk depression or a triple fold, which is joined to the outer edge of panel 18 the central panel 12.
[0052] The manufacturing steps begin in a can end wrapping press with the cutting edge cutout, typically a round or non-round cutting edge of the thin sheet metal. Examples of non-round cutting edge blanks include elliptical cutting edges, spiraled cutting edges, and harmonic cutting edges. A spiral cutting edge can generally be described as having three distinct diameters, with each diameter 45 ° from the others. The cutting edge is then formed as a rough end by forming the splice undulation, the countersunk depression, the radius of the panel and the center panel. FIG. 3 shows a can end wrap 100.
[0053] A means to open the end of the can or access the contents of the container is typically formed in a process of conversion to this type of end closure and performed in a conversion press. This process includes the following steps: forming a rivet by first forming a projected bubble in the center of the panel and by subsequently working the bubble metal as a button and in the narrowest projection of the metal which is the rivet; the formation of the tear panel by streaking the metal of the panel wall; the formation of an internal edge or panel in the tear panel; forming a roughing panel when bending the metal of the panel wall in such a way that a central area of the panel wall is slightly lower than the remaining panel wall; stake the flap in the rivet; and other subsequent operations such as cleaning steps to remove the sharp edges of the flap, written on the panel wall by cooling, incising or engraving (or roughing), and regulping the rivet console. FIG. 2 shows a converted can end 10.
[0054] For the purpose of this description and the claims, the term "can end" includes both finished converted can ends as well as can end wraps that have not been processed through a conversion press. A more detailed explanation follows.
[0055] The center panel wall 12 is generally centered around a longitudinal or central axis 50 and has a displaceable tear panel 20 defined by a frangible streak 22 and a non-frangible hinge segment 25. The tear panel 20 of the central panel 12 can be opened, that is, the frangible streak 22 can be pulled out and the tear panel 20 can be moved in an angular orientation with respect to the remaining portion of the central panel 12, while the tear panel 20 continues articulated to the central panel 12 through the hinge segment. In this opening operation, the tear panel 20 is moved to an angular deflection. More specifically, the tear panel 20 is deflected at an angle to the plane of the panel 12, where the vortex of angular displacement is the hinge segment.
[0056] The tear panel 20 is formed during the conversion process by a grooving operation and preferably has a surface area of more than 0.5 inches (3.23 cm2). The tools for grooving the tear panel 20 on the central panel 12 include an upper die on one side of the audience 34 that has a knife edge in the shape of the tear panel 20, and a lower die on one side of the product 35 for support the metal in the regions being grooved. When the upper and lower dies are brought together, the metal of the panel wall 12 is striated between the dies. This results in the groove knife edge being fitted into the metal of the panel wall 12, forming the streak that appears as a wedge-shaped recess in the metal. The remaining metal below the wedge-shaped recess is the remainder of lane 22. Therefore, lane 22 is formed by the groove knife edge that causes the metal to move, such that the impression of the groove knife edge is made on the public side 34 of the panel wall 12.
[0057] The tear panel 20 may also include an anti-fracture streak 23. The anti-fracture streak is generally positioned radially into the frangible streak 22, except in the hinged region 25, and generally follows the contour of the frangible streak 22 The anti-fracture streak is provided to reduce residual stresses associated with the main streak line in order to prevent or minimize the occurrence of micro-cracks in, or premature fracture along, the frangible streak line 22. Thus, a lane line may include frangible lane 22 and anti-fracture lane 23 in combination or, as will be described, only frangible lane 22.
[0058] The tear panel 20 can also include a drop panel 24. The drop panel 24 forms a recessed segment between the positions of about 10 am and 2 hours on the tear panel 20, when using a clock-type orientation in that a center of the clock-type orientation is defined by a central axis that extends through a rivet 28 that is perpendicular to a transverse axis that extends through a wider segment of the displaceable tear panel 20 and in which a segment the central axis defines a distance from 12 hours to 6 hours. From the segment recessed to the 6 o'clock position on the tear panel 20, the descending panel 24 decreases smoothly in depth until it blends smoothly with the adjacent areas of the tear panel 24 between the approximately 4 o'clock position and the about 8 o'clock position and continuing at least somewhat backward from about 8 o'clock position clockwise to about 4 o'clock position,
[0059] The authors of the present invention are also aware of tear panels that have ascending or convex circumferential edges and circumferential, descending or concave reverse edges.
[0060] The central panel 12 also includes a flap 26. The flap 26 has a generally elongated body with a central axis defined by a central cross section through the nose 30 of the flap, and through a central network 42 and the end of hoisting 32. The ends of typical prior art containers often have a flap 26 which is stabbed in the final stages of the conversion process by staking the area of the adjacent panel wall 12 and under the rivet console 46 at an angle to urge the flap 26 in such a way that the lifting end 32 of the flap 26 is supported near the wall of the panel 12. The central panel 12 can also have a recess near the lifting end 32 of the flap 26 to allow easier access of the finger .
[0061] The opening of the tear panel 20 is operated by the flap 26 which is joined to the central panel 12 by the rivet 28, generally through a rivet hole. The flap 26 is attached to the central panel 12 in such a way that the nose 30 of the flap 26 extends over a proximal portion of the tear panel 20. The lifting end 32 of the flap 26 is located opposite the nose 30 of the flap and provides access for a user to lift the lifting end 32, such as with the user's finger, to force the nose 30 against the proximal portion of the tear panel 20.
[0062] When the nose 30 of the flap is forced against the tear panel 20, the streak 22 initially breaks in the exit region of the streak 22 of the tear panel 20. This initial rupture of the streak 22 is caused mainly by the lifting force in the flap, which results in the lifting of a central region of the central panel, immediately adjacent to the rivet 28, which causes the residual metal to separate from streak 22. The force required to break the streak in the exit region, typically indicated as a "burst" force, it is a lower degree of force relative to the force required to propagate other regions of lane 22 by the continuous lifting of the lifting end 32 of flap 26. Therefore, it is preferable that the panel 12 in the area around the rivet 28 only rises high enough to assist with the initial break of the streak, or "burst", and remains substantially rigid and smooth to provide the lever force necessary for the flap 26 to propagate the tear line of the tear panel 20.
[0063] After the initial "pop", or exit of the tear panel, the user continues to lift the lifting end 32 of the flap 26, which causes the nose 30 of the flap to be pushed down on the tear panel 20 to continue the break of lane 22 as an opening force. As the opening operation is continued, the tear panel 20 is moved downwards and rotated around the hinge region to be deflected into the container.
[0064] The downward-extending wall or nozzle wall 15 includes a portion of an inclined or curved upper wall 60 that has an arcuate cross-sectional shape and is joined to the undulation 14 through a concave curvature in relation to the side of the audience 34. The nozzle wall 15 has an inclined lower wall portion 64 which is directly attached to the reinforcement member 16, in this case a countersunk depression generally U-shaped. An outer wall 68 of the countersunk depression and the lower wall portion 64 of the nozzle wall 15 extends at an angle.
[0065] An inner wall 72 of the countersunk depression extends upward and is slightly angled radially inward by less than 10 °. The inner wall 72 is joined to the central panel 12 through a circumferential panel that has a radius of the convex or lower cun / atura panel 76 joined to another radius of the convex or superior curvature panel 80 by a short wall 84. The radius top panel 80 is located radially inward with respect to the central axis 50 of the bottom panel radius 76. The circumferential panel has a lower point and a higher point where an angle <p of a straight line drawn from the lower point the highest point is between 15 ° and 75 °, more preferably between 30 ° and 60 °, and more preferably about 45 ° as measured from a vertical central line. A segment of the circumferential panel, preferably in the short wall 84, is in the straight line.
[0066] The characteristics described in the following paragraphs mainly contribute to the resistance of the can end by allowing a Dcp diameter of the central panel 12 to be increased through renovation and / or by allowing an increase in the length / height of the wall internal 72 of the countersunk depression and / or by decreasing the angle of the inner wall 72 as measured from a vertical axis as illustrated in FIG. 5, preferably about 5 ° as measured from a vertical axis, and more preferably substantially vertical. Expansion or increase in the Dcp diameter of the center panel 12 generally results in an increased height of the center panel, a more vertical inner wall 72, and a tighter radius of the panel. It also makes the radius of the panel difficult. A longer, more vertical inner wall 72 leads to better deformation performance. However, the inner wall 72 must exhibit at least some angle to the vertical so that a fully formed can end is removed from the tool used to form the can end. Without any angle, the can end will attach to the bottom tool, which should adversely affect the manufacture of the can end.
[0067] With respect to FIGS. 6-22, the circumferential panel includes one or more elements that directly and / or indirectly improve the performance of the can end in relation to deformation or resistance to deformation and / or flap over the edge. These elements are generally deformations, such as wedged segments (ie, compressed metal between two tools to produce a locally cold worked metal segment has a locally reduced thickness produced from compression), convex or concave edges (ie, a curvilinear deformation produced between a convex shaped tool and a concave shaped tool), and / or flexed to produce a convex or concave bent structure in relation to the public side 34. The elements can be located within the radius of the lower panel 76, in the radius of the upper panel 80, and / or in the short wall 84. In general, any coinage operation occurs in one or both the radius of the lower panel 76 and the radius of the upper panel 80, although the short wall 84 can also be subjected to a coinage operation, whereby any portion of the circumferential panel can be minted.
[0068] As indicated in the preceding paragraph, the circumferential panel has one or more elements formed in it. The elements may locally provide additional material of the thickness of the can end or other volumetric dimensions of the can end from which a substantially vertical, radially internal wall 72 of the countersunk depression 16 is formed which has sufficient length / height at which the can end exhibits a strain resistance greater than or equal to 100 psi. Again, these elements can be formed within the wrapping production process or during the conversion of a can end wrap 100 to a finished can end 10.
[0069] A rim 92 can be formed on the circumferential panel. A rim is a formation at the can end where the deformation of the public side 34 and the product side 35 is substantially uniform, such that the public side 34 and the product side 35 remain substantially parallel throughout the structure edge. The edge 92 shown is concave with respect to the audience side 34, but can be convex with respect to the audience side 34 if desired. The edge 92 can be formed at a junction between the radius of the lower panel 76 and the short wall 84, a junction between the radius of the upper panel 80 and the short wall 84, and / or on the short wall 84 between the junctions with the radius of the upper panel 80 and the radius of the lower panel 76. The rim 92 generally has an arcuate shape in the cross section, although it can assume virtually any other shape without deviating from the character of the invention. Thus, the circumferential panel may include the radius of the lower panel 74 separated from the radius of the upper panel 78 by the short wall generally extended upwards and inwards 84, which has a first segment extending radially inwardly with respect to the central axis , a second segment comprising a concave curvature in relation to the public side, and a third segment extending upwards and radially outwards in relation to the central axis 50,
[0070] However, locations other than rim 92 can cause or result in various other formations and structural orientations in the circumferential panel. For example, a convex curvature in relation to the public side can be located between the edge 92 and the radius of the lower panel 76. In addition, a convex curvature in relation to the public side can be located between the edge 92 and the radius of the upper panel 80. In this way, the rim 92 may have a segment extending radially inwardly with respect to the central axis 50 and downwards from a radially innermost portion of the radius of the lower panel 76. Alternatively or additionally, the rim 92 may have a segment extending downwardly and radially inward with respect to a radially outermost portion of the radius of the upper panel 80. These varying orientations depend on the location, depth and direction of the rim 92 as illustrated in the drawings.
[0071] In addition, the circumferential panel may include one or more die-cut segments 96. The coinage is a compression of the material between two tools. As a result of the coinage, there will be a cold-worked segment located at the can end that is less thick than the surrounding portions of the can end. This localized thinning results in additional material from which the height of the internal wall 72 of the countersunk depression is lengthened or increased, the angle of the countersunk depression is decreased, and / or the diameter of the central panel is increased 12. A first wedged segment 96 can be positioned in the radius of the lower panel 76, in the radius of the upper panel 80, or in the short wall 84. An additional wedge segment 96 can be positioned in one of the remaining sections of the circumferential panel, and another additional wedge segment 96 can be positioned in the last remaining section of the circumferential panel.
[0072] The characteristics described above allow a can end 10 to be calibrated downwards or produced from a more final metal blank, less than 0.0082 inch (0.2083 mm), preferably less than or equal to 0.0080 inch (0.2032 mm), with the diameter of the blank remaining constant and a Dend diameter and a ripple height Hcur1 of the can end also remaining constant, while a Dcp diameter of the center panel can be expanded from the can ex-wraps wrap 100 at the finished converted can end 10. In other words, a metal saving is achieved at the expense of the thickness of the metal blank from which the blank is formed and the thickness of the material at the resulting finished can end 10, and not at the expense of other dimensions. In this way, modifications to the can body to which the end is spliced should not have to be changed nor the tool to change the end to the can body. This is very advantageous because such changes in the design of the can body would be expensive and time-consuming, as well as changes in the method for changing the end of the can to the body of the can.
[0073] Preferably speaking, the elements described above are formed during the conversion process. Executed in the conversion press, the present invention reduces the dimensional variation of the countersunk depression of the can end by reforming the countersunk depression 16 during the conversion press operation. This leads to the improved double seam in the can bodies by reducing the variation (i.e., seam defects) caused by dimensional variations in the countersunk depression within an individual can end. The invention potentially reduces the cutting edge and improves the performance of deformation, and / or flap over the edge. The authors of the present invention have found that reforming the can end according to the present invention in the converting press instead of creating the final shape in the wrap press leads to a more consistent shape of the can end from article to article. In other words, one of the benefits of the present invention is a more consistent product with less variability.
[0074] It follows that, in a method of the invention, a can end wrap 100 formed in a wrap press is provided. The wrap 100 has an audience side 34 and an opposite product side 35, and a circumferential ripple 14 is located around a central axis 50 and defines an outer perimeter of the can end wrap 100. A circumferential wall 15 extends downwards from the undulation 14. A generally circumferential countersunk depression 16 in a U-shape extends radially inwardly from the circumferential wall 15 with respect to the central axis 50 and upwards. A central panel 12 extends radially inward from the countersunk depression 16 with respect to the central axis 50. A circumferential panel joins the countersunk depression 16 with the central panel 12. At this point, the wrap 100 does not have a flap 26 attached to the public side 34 and a movable tear panel 20 defined by a frangible streak 22 and a hinge segment 25.
[0075] The provided can end wrap 100 includes a dimensional variability around the circumference of the countersunk depression in general in the form of U 16. The modalities illustrated in FIGS. 1-22 show a countersunk depression 16 with a compound radius, that is, a countersunk depression that has a radially external annular curved portion that has a smaller radius of curvature than a radially internal annular curved portion of the U-shaped countersunk depression 16 Less preferably, the radially inner annular curved portion of the countersunk depression has a smaller radius of curvature than a radius of curvature of the radially outer annular curved portion of the countersunk depression 16. Or, as shown in FIGS. 23 and 24, the countersunk depression 16 may have a more uniform structure in which the radially curved outer portion is substantially equal to the radially radius of curvature.
[0076] The can end wrap 100 is reformed in a conversion press. In the conversion press process, the tear panel 20, the flap 26 and other elements of the central panel are added to the can end as needed and as described above and illustrated in FIGS. 1 and 2. The elements illustrated in any of FIGS. 5-22 and described above can also be applied to can end wrap 100 during the conversion process. In addition, the dimensional variability in the countersunk depression 16 of the can end wrap 100 can be removed in the conversion press. This is accomplished by reforming the countersunk depression 16 in the conversion press where the converted can end has a countersunk depression 16 that is more uniform and dimensionally consistent around the circumference of the countersunk depression 16. This will improve the total deformation resistance of the can end because the dimensional inconsistency around the circumference of the countersunk depression 16 forms places of stress rise where deformation can be initiated. The removal of dimensional variability by reforming the can end wrap in the conversion press in accordance with the present invention improves the strength and performance of the can end with the removal of weak points or stress elevation sites.
[0077] A radius of curvature of the radially curved external portion of the countersunk depression 16 and / or the radially internal curved portion of the countersunk depression 16 can be decreased. This can coincide with an increase in the length / height of the inner wall 72 of the countersunk depression 16 and / or decrease of the angle of the inner wall 72 of the countersunk depression 16. Of course, one or more of the elements described above can also be introduced into the circumferential panel.
[0078] As illustrated in FIGS. 23 and 24, the countersunk depression 16 of the can end wrap 100 (shown in solid lines) is provided with radially internal and external annular curved portions that are substantially the same. The reformed can end is shown in broken lines.
[0079] In Fig. 23, wrap 100 is reformed in a manner similar to the reform shown in FIG. 5. The inner wall 72 of the countersunk depression becomes more vertical, that is, the angle of the inner wall 72 is decreased as measured from a vertical axis. An internal wall length / height 72 is increased. A change in length / height of the inner wall 72 subsequent to the renovation is shown as H ^ wc. A center panel diameter is increased. A change in the diameter of the center panel 12 following the renovation is shown as DACP. An angle tps of the circumferential panel can be decreased to an angle <pr of about 45 ° to a minimum of 30 °.
[0080] In Fig. 24; the countersunk depression 16 of the casing 100 is reformed to tighten or decrease the radii of curvature of the radially internal and radially external annular portions of the countersunk depression 16. The lower portion 64 of the nozzle wall 15 and the external wall 68 of the countersunk depression is also reformed to increase an angle of these portions with respect to a vertical axis. A height of the HQS wrap of corrugation 14 above a lower portion of the countersunk depression is decreased subsequent to the reform for Hcpr, starting at about 0.240 to 0.242 inch and reformed to about 0.236 inch. A height of the center panel Hcps is increased very slightly to a height Hcpr. A diameter of the center panel 12 is relatively unchanged. The inner wall 72 of the countersunk depression becomes more vertical, that is, the angle of the inner wall 72 is decreased as measured from a vertical axis. An internal wall length / height 72 is increased.
[0081] The authors of the present invention also contemplate removing the wrap illustrated in FIG. 24, for example, provided with radially internal and external annular curved portions of the countersunk depression 16 which are substantially equal, and reforming the countersunk depression 16 to the profile shown in FIGS. 6-22, that is, with a composite radius structure with a radius of curvature of the radially internal annular curved portion within the range of about 0.037 inch to about 0.040 inch and an radially radially external annular curved portion that has a radius of curvature within from about 0.01 inch to about 0.037 inch.
[0082] The terms "first", "second", "top", "bottom", "top", "bottom", etc., are used for illustrative purposes in relation to other elements only and are not intended to limit the modalities in no way. The term "plurality" as used in the present invention is intended to indicate any number greater than one, disjunctively or together, as necessary, up to an infinite number. The terms "joined", "fixed" and "connected", as used in the present invention, are intended to join or approximate two elements in order to form a unit, and any number of elements, devices, fasteners, etc., may be provided between joined or connected elements, unless otherwise specified by the use of the term "directly" and / or supported by the drawings.
[0083] Although the specific modalities have been illustrated and described, numerous modifications come to mind without significantly deviating from the character of the invention and the scope of protection is limited only by the scope of the appended claims.

权利要求:
Claims (8)
[0001]
1. Can end (10), comprising: one side of the public (34) and one side of the opposite product (35); a circumferential undulation (14) located around a central axis (50) and defining an external perimeter of the can end (10); a circumferential wall (15) extending downwards from the undulation; a circumferential countersunk depression, usually in a U-shape (16) that extends radially inward, from the circumferential wall (15) in relation to the central axis (50) and upwards; a central panel (12) extending radially inward, from the countersunk depression (16), in relation to the central axis (50), comprising a displaceable tear panel (20) defined by a frangible streak and a segment of hinge on the public side (34) and a flap attached to the public side (34) which has a nose portion superimposed on a portion of the displaceable tear panel (20); and a circumferential panel that joins the countersunk depression (16) with the central panel (12) comprising a first panel radius (76) joined to a second panel radius (80) by a short wall (84) extending to upwards and inwards and has a rim (92) formed in it, characterized by the fact that: a first convex curvature, in relation to the public side (34) is located between the rim (92) and the first radius of the panel (76 ).
[0002]
2. Can end (10) according to claim 1, characterized by the fact that it additionally comprises: a second convex curvature, in relation to the public side (34) in the short wall (84) in which the rim (92 ) is located between the first convex curvature and the second convex curvature.
[0003]
3. Can end (10), according to claim 1, characterized by the fact that it additionally comprises: a second convex curvature, in relation to the public side (34) located between the rim (92) and the second radius of the panel (80).
[0004]
4. Can end (10) according to claim 1, characterized by the fact that the short wall (84) extends upwards and radially inwards, in relation to the central axis (50) at an angle between about 15 ° and 75 ° and in which the first radius of the panel (76) has a first die formed on it.
[0005]
5. Can end (10) according to claim 4, characterized by the fact that it additionally comprises: a second wedged segment formed in the second radius of the panel (80).
[0006]
6. Can end (10) according to claim 1, characterized by the fact that the first radius of the panel (76) is directly connected to the countersunk depression (16) and the second radius of the panel (80) is directly connected to an outer peripheral edge of the center panel (12).
[0007]
7. Can end (10) according to claim 1, characterized by the fact that the rim (92) comprises a first segment that extends radially inwards, in relation to the central axis (50) and downwards, from a radially outermost portion of the circumferential panel.
[0008]
8. Can end (10) according to claim 1, characterized by the fact that the rim (92) comprises a first segment, which extends radially inwards, in relation to the central axis (50) and downwards , from a more upper portion of the circumferential panel.

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法律状态:
2017-07-11| B08F| Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]|Free format text: REFERENTE AS 3A E 4A ANUIDADES. |

2017-09-19| B08G| Application fees: restoration [chapter 8.7 patent gazette]|

2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-10-22| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2020-09-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2020-12-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 14/05/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

US13/471,218|US9821928B2|2012-05-14|2012-05-14|Can end|

US13/471,218|2012-05-14|

PCT/US2013/040873|WO2013173280A1|2012-05-14|2013-05-14|Can end|

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