• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Cylindrical foam body (1) with a central cavity (9), wherein the foam body (1) is formed by a curved strip (2) of flexible foam of which two opposite ends (3) are attached to each other, the foam body having a height ( H), wherein the strip 2 has a length (L), a height (h) and a width (b), the longitudinal direction (L) of the strip 2, after forming the foam body (1) the height direction ( H) of the foam body (1), wherein, the foam body (1) has an outer side (5) and an inner side (8), characterized in that the foam body (1) is provided on its outer side (5) with two or more more grooves (7) which each extend over the height (H) of the foam body (1) and which intersect the foam body (1) only over a part of the distance between the outside (5) and the inside (8).
    公开号:BE1022700B1
    申请号:E2015/5050
    申请日:2015-02-03
    公开日:2016-08-16
    发明作者:Willy Poppe
    申请人:Advanced Spring Technology, Naamloze Vennootschap；
    IPC主号:
    专利说明:

    Cylindrical foam body, use thereof and method of manufacturing it.
    The present invention relates to a cylindrical foam body, the use thereof and to a method of manufacturing such a foam body.
    More specifically, the invention is intended to serve as foam springs in mattresses and pillows. The use of mainly cylindrical curved foam strips to serve as a spring in a mattress or pillow is well known, for example from WO 2010/121333.
    The market share of such foam springs for use in mattresses and the like is increasing, at the expense of steel springs, because of the greater durability and the better comfort.
    Such foam springs are usually made from flexible polyurethane foams, including cold foams and visco-elastic foams, but occasionally also from latex foam.
    The best foam springs are made from cut strips of foam blocks that are produced in a continuous casting process, so-called slabstock blocks, whereby the strips are bent around and the ends are glued together. Strips are hereby cut at various places so that gaps are created in the wall of the foam springs. Bending around creates a tension in the foam spring that appears to be essential for good spring behavior.
    Attempts to form foam springs in a different way, for example in a mold or by cutting them out of foam blocks, have had only limited success: the springs have too low a bearing capacity for the application, and such a method of manufacture is expensive and produces a lot of waste.
    However, the disadvantages of the known foam springs under bending stress are: because the foam is cut in several places, it loses much of its bearing capacity, and a foam with a relatively high density must be used. This is relatively expensive and naturally also leads to a relatively heavy end product; a certain width of a strip of foam produces, independently of the amount and size of the cuts, a foam spring with a certain diameter. This means that adjustments to the diameter of the foam spring can only be made by adjusting the size of the foam strip, which is cumbersome and precludes easy, automated production with a limited stock of raw materials.
    It would be theoretically optimal to be able to bend a non-perforated strip of foam into a foam spring. However, this has the drawback that such high internal stresses are applied to parts of the foam spring.
    For example, a strip of foam with a width of 190 mm and a height of 30 mm on its outside should stretch approximately 70% if the ends thereof are glued together.
    As a result, the foam structure formed starts to deform: firstly, the inside of the foam spring can be compressed in an uncontrolled and un-reproducible manner by the tension on the outside, so that a variable, un-reproducible result is obtained.
    Secondly, the foam spring is not homogeneous: it has a different structure at the location of the bond than at other places. As a result of this, as a result of the tension on the outside, a drop-shaped cross-section is obtained instead of the desired round cross-section.
    The present invention has for its object to provide a solution to the aforementioned and other disadvantages in that it provides a cylindrical foam body with a central cavity, wherein the foam body is formed by a curved, and therefore bending stress, flexible foam strip, two of which are opposite mutually adjacent ends are attached to each other, the foam body having a height, the strip having a length, a height and a width, the longitudinal direction of the strip, after forming the foam body, being the height direction of the foam body, the foam body has an outside and an inside, wherein the foam body is provided on its outside with two or more grooves which each extend over the height of the foam body and which cut the foam body only over a part of the distance between the outside and the inside.
    This has the advantage that only limited tension is created on the outside of the foam body because the grooves open and thereby reduces the required extension on the outside of the foam body, so that the above-mentioned deformation does not occur, or only very limitedly.
    However, it is important that a certain bending stress remains to give strength and stability to the foam body.
    Such a foam body can then be used as a foam spring in mattresses, seat cushion and pillow.
    Such a foam body can also be produced without waste being generated: all or nearly all of the foam in the strip is used and is also effectively used to give bearing capacity and resilience in the application.
    A further advantage is that foam bodies with different diameters can be manufactured from a strip of foam with certain dimensions, by adjusting the number and, to a lesser extent, the depth of the grooves, which makes industrial production cheaper.
    Springs of different hardnesses can also be made from a strip of foam with specific dimensions and of a specific quality by adjusting the depth and to a lesser extent the number of the grooves.
    In a preferred embodiment, before the foam body is formed, the flexible foam strip is provided with cuts, in other words incisions, which extend over a longitudinal distance of the strip corresponding to the full height of the foam body, the cuts after forming the foam body form the grooves in the foam body.
    No foam waste is formed in this way, which is attractive for cost and environmental reasons. It is also easy to make cuts with simple tools.
    In yet another preferred embodiment, before the foam body is formed, the flexible foam strip is provided with milled grooves extending over a longitudinal distance of the strip corresponding to the full height of the foam body, the grooves in the foam strip after formation of the foam body form the grooves in the foam body.
    The advantage of this is that the end of the grooves in the foam strip can be rounded off, and usually will be because a foam cutter cannot be made extremely thin or difficult to execute, so that the risk of cracking initiation during or after bending around on that places is reduced.
    It is true that some milling residue is generated here, but this should not be regarded as waste, since this material is removed from the corners of the teeth between the grooves, which material does not make any useful contribution to the spring properties of the foam body, so that this cannot be considered a waste of resources.
    In a further preferred embodiment, before the foam body is formed, the flexible foam strip is provided with a regular wave pattern arranged over an entire surface of the strip, the waves extending substantially perpendicular to the longitudinal direction of the strip and with wave troughs after formation of the foam body the grooves in the foam body form.
    Such a wave pattern can easily be applied by a convoluting machine, which is well known in the foam processing industry, wherein two strips of foam with a wave pattern are produced simultaneously, so that it is extremely interesting from a cost point of view.
    In preferred embodiments, the number of said grooves in the foam body is six or more, and preferably eight or more. This makes it better to obtain a cylindrical shape than with a lower number of grooves.
    In preferred embodiments, the flexible foam strip in its longitudinal direction and / or width direction and / or height direction is composed of more than one sub-strip, i.e. of a number of foam strips with possibly different properties connected to each other.
    This allows the spring behavior to be varied.
    The invention further relates to the use of a foam body according to the invention as a spring in a mattress or pillow. Hereby the springs are used with their height direction in the direction in which the greatest force is exerted during use of the mattress or pillow, normally the vertical direction.
    The invention further relates to a method for making a cylindrical foam body which comprises the following steps in sequence: A: a strip of flexible foam is provided with cuts, grooves or a wave pattern; B: the flexible foam strip is bent around and two ends of the strip are connected to each other to fix the bent state, the axis around which the strip is being bent completely or substantially parallel to the cuts, grooves or wave pattern.
    For the purpose of better demonstrating the features of the invention, preferred embodiments of a foam body according to the invention are described below, as an example without any limiting character, with reference to the accompanying drawings, in which: figure 1 shows diagrammatically and in perspective a foam body according to the invention; figure 2 represents a starting product for the manufacture of the foam body of figure 1; figure 3 schematically and in perspective represents an alternative foam body according to the invention; figure 4 represents a starting product for the manufacture of the foam body of figure 3; figure 5 represents a tool, partly in side view and partly in section, for manufacturing the starting product of figure 4; figure 6 schematically represents an alternative foam body according to the invention in perspective; and figure 7 represents a starting product for the manufacture of the foam body of figure 6.
    The foam body of Figure 1 is formed by a substantially cylindrical curved strip of foam, as shown in Figure 2, two ends 3 of which are glued together and thereby form a glue seam 4 in the foam body 1.
    The foam body has a height of approximately 12 cm and a diameter of approximately 10.5 cm. The wall thickness is approximately 2.5 cm.
    On the outside 5 of the foam body 1, the foam body 1 is provided with thirteen teeth 6 and grooves 7, which in this example are V-shaped and which extend parallel to the height direction H over the full height H.
    The inner side 6 of the foam body 1 defines a central cavity 9 in the foam body 1.
    Due to the fact that it is under bending stress, such a foam body 1 is very suitable to serve as a foam spring to absorb forces in the vertical direction.
    A mattress can for instance be formed by placing tens to hundreds of such foam bodies 1 next to each other and providing them with a covering layer.
    Such a foam body 1 can be manufactured very simply by taking a rectangular strip 2 of flexible polyurethane foam with a height h of 2.5 cm, a width b of 18 cm and a length L of 12 cm, as shown in Figure 2, and these to be provided with thirteen cuts 10 arranged at regular intervals, each running the full length L and having a depth A of 15 mm from the upper surface 11 and thus not cutting the strip 2 up to the lower surface 12.
    Such cuts 10 can be made, for example, with the aid of rotating blades.
    In order to avoid confusion, it is noted that in this example the dimension of the strip 2 indicated as width b is larger than the dimension indicated as length L.
    The strip 2 is then bent in the longitudinal direction L, as indicated by the arrow P, after which the two ends 3 of the strip 2 are glued together.
    The cuts 10 in the strip 2 are hereby pulled open to grooves 7 in the foam body 1 thus formed. This allows the foam body 1 to be formed without the foam on the inside 8 being compressed significantly and without the glue seam 4 having a significant distortion of the foam body 1.
    Alternatively, such a foam body 1 can be manufactured in a continuous manner by unrolling a strip 2 of foam rolled up in the width direction b, then passing through a cutting device in which the strip 2 is provided in the longitudinal direction L with cuts 10, then through a bending device and to guide a gluing device in which the strip 2 is bent in the longitudinal direction L and the side surfaces are glued together to form a tubular structure, from which parts can ultimately be cut corresponding to the desired height H of the foam body 1.
    The alternative foam body 1 shown in Figure 3, and the foam strip shown in Figure 4, differ from the embodiment of Figures 1 and 2 in that the strip is also already provided with grooves 13, instead of cuts 10. These grooves 13 have a rounded end 14. Here the number of grooves 14 is ten.
    When bending around to a foam body 1, the grooves 13 in the foam strip 2 become considerably wider until they form the grooves 7 in the foam body 1. The rounded end 14 of the grooves 7 reduces the risk of cracking being the greatest at that location in the molded foam body 1.
    Such a strip of foam 2 can easily be produced by passing an untreated strip of foam under a foam cutter 15, which rotates in the direction of arrow Q as shown in Figure 5.
    The alternative foam body 1 shown in Figure 6, and the foam strip 2 shown in Figure 7, differ from the embodiment of Figures 1 and 2 in that the strip 2 is provided with a wave pattern arranged with a convoluting machine.
    In such a machine, foam is passed between toothed rollers which compress the foam or not depending on the location, and cut lengthwise in that condition, so that differences in height arise between parts of the foam that were compressed when they were cut and parts that were not compressed. when they were cut.
    The number of wave troughs 16 in the wave pattern is 9 in this example.
    When bending around to a foam body 1, the wave troughs 16 in the foam strip 2 become considerably wider until they form the grooves 16 in the foam body 1.
    In order to obtain a foam spring 1 with the same diameter D as the above two embodiments, in this embodiment the length L of the strip 2 must be taken ten to twenty% larger.
    It will be clear that the spring properties of the foam body 1 can be easily adjusted, of course by adapting the nature of the foam, but also by the depth A, the number and the shape of the cuts 10, grooves 13 and corrugations 16 to fit.
    The present invention is by no means limited to the embodiment described by way of example and shown in the figures, but a foam body according to the invention can be realized in all shapes and sizes without departing from the scope of the invention.
    权利要求:
    Claims (12)
    [1]
    Conclusions. Cylindrical foam body (1) with a central cavity (9), the foam body (1) being formed by a curved strip (2) of flexible foam of which two opposite ends (3) are attached to each other, the foam body has a height (H), wherein the strip 2 has a length (L), a height (h) and a width (b), the longitudinal direction (L) of the strip 2, after forming the foam body (1) is the height direction (H) of the foam body (1), wherein the foam body (1) has an outside (5) and an inside (8), characterized in that the foam body (1) is provided on its outside (5) with two or more grooves (7) which each extend over the height (H) of the foam body (1) and which cut the foam body (1) only over a part of the distance between the outside (5) and the inside (8) .
    [2]
    Foam body according to claim 1, characterized in that the strip (2} of flexible foam for forming the foam body (1) is provided with cuts (13) which extend over a longitudinal distance (L) of the strip (2) corresponds to the height (H) of the foam body (1), wherein the cuts (13) form the grooves (7) in the foam body (1) after the foam body (1) is formed. 3. "Foam body according to claim 1 or 2 , characterized in that for flexible body formation, the strip (2) of flexible foam is provided with milled grooves (.1.3) which extend over a longitudinal distance (L) of the strip (2) corresponding to the height (H) of the foam body (1), wherein the grooves (13) in the strip (2) of foam after forming the foam body (1) form the grooves (7) in the foam body (1).
    [4]
    Foam body according to one of the preceding claims, characterized in that the strip (2) of flexible foam for forming the foam body (1) is provided with a regular wave pattern arranged over an entire surface (11) of the strip, wherein the waves of the wave pattern extend substantially perpendicular to the longitudinal direction (L) of the strip (2) and wherein wave troughs (16) form the grooves (7) in the foam body (1) after the formation of the foam body (1).
    [5]
    Foam body according to one of the preceding claims, characterized in that the number of said grooves (7) in the foam body is six or more.
    [6]
    Foam body according to one of the preceding claims, characterized in that said grooves (7) in the foam body (1) run parallel to the height direction (H) of the foam spring (1). Foam body according to one of the preceding claims, characterized in that the strip (2) of flexible foam in its longitudinal direction (L) is composed of more than one sub-strip.
    [8]
    Foam body according to one of the preceding claims, characterized in that the strip (2) of flexible foam in its width direction (b) is composed of more than one sub-strip.
    [9]
    Foam body according to one of the preceding claims, characterized in that the strip (2) of flexible foam in its height direction (h) is composed of more than one sub-strip.
    [10]
    Use of a foam body (1) according to one of the preceding claims as a foam spring in a mattress or pillow.
    [11]
    Method for making a cylindrical foam body (1), characterized in that it comprises the following steps in sequence: A: a strip (2) of flexible foam is provided with cuts (5), grooves (13) or a wave pattern that do not bridge the distance between an upper surface (11) and a lower surface (12) of the strip (2), B: the strip (2) is bent around and two ends (3) of the strip (2) are connected to each other to fix a curved state, wherein the axis around which the strip (2) is bent is wholly or substantially parallel to the cuts (5), the grooves (13) or the wave pattern.
    [12]
    Method according to claim 11, characterized in that it is a method for manufacturing a foam body (1) according to one of claims 1 to 9.
    [13]
    Method according to claim 11 or 12, characterized in that immediately after step B the curved strip (2) has a length (L) that is greater than the desired height (H) of the foam body (1), wherein after step B the foam body (1) with the desired height (H) is cut off from the curved strip of flexible foam.
    [14]
    Method according to claim 11 or 12, characterized in that the strip (2) of flexible foam for step B has a length (L) corresponding to the desired height (H) of the foam body (1), wherein the cuts or grooves extend over the full length (L) of the strip (2) or wherein the wave pattern extends over a full surface (11) of the strip.
    类似技术:
    公开号 | 公开日 | 专利标题
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    ES2299641T3|2008-06-01|PROCEDURE FOR THE PRODUCTION OF PORTIONS OF MEAT IN A TRANSFORMING PRESS.
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    同族专利:
    公开号 | 公开日
    ES2701699T3|2019-02-25|
    CN107427135A|2017-12-01|
    PT3253258T|2018-12-19|
    CN107427135B|2021-02-02|
    EA031816B8|2019-06-28|
    DK3253258T3|2019-01-14|
    TN2017000343A1|2019-01-16|
    AU2016214983A1|2017-09-07|
    WO2016123680A1|2016-08-11|
    US10932587B2|2021-03-02|
    HRP20182093T1|2019-05-03|
    PL3253258T3|2019-06-28|
    BE1022700A9|2017-03-17|
    EA031816B1|2019-02-28|
    PH12017550071B1|2018-02-05|
    EP3253258A1|2017-12-13|
    CA2977671A1|2016-08-11|
    BR112017016741B1|2021-02-02|
    EA201791740A1|2017-11-30|
    AU2016214983B2|2020-09-10|
    LT3253258T|2019-03-12|
    RS58262B1|2019-03-29|
    UA121491C2|2020-06-10|
    AU2016214983A8|2017-09-21|
    BR112017016741A8|2020-11-24|
    SI3253258T1|2019-04-30|
    US20180000257A1|2018-01-04|
    EP3253258B1|2018-09-12|
    KR20170138392A|2017-12-15|
    PH12017550071A1|2018-02-05|
    WO2016123680A8|2017-10-12|
    CA2977671C|2019-12-10|
    BR112017016741A2|2019-11-12|
    TR201819219T4|2019-01-21|
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    法律状态:
    2018-01-31| FG| Patent granted|Effective date: 20160816 |
    2018-01-31| PD| Change of ownership|Owner name: ROMERIKA NV; CW Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), AFFECTATION / CESSION; FORMER OWNER NAME: ADVANCED SPRING TECHNOLOGY, NAAMLOZE VENNOOTSCHAP Effective date: 20170825 |
    2022-02-09| PD| Change of ownership|Owner name: VANEMA STORITVE D.O.O.; SI Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: ADVANCED SPRING TECHNOLOGY, NAAMLOZE VENNOOTSCHAP Effective date: 20211213 |
    2022-02-09| RC| Pledge established (pawning)|Free format text: DETAILS PLEDGE: RIGHT OF PLEDGE, ESTABLISHED Name of requester: GORENJSKA BANKA D.D. Effective date: 20211213 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20155050A|BE1022700A9|2015-02-03|2015-02-03|Cylindrical foam body, use thereof and method of manufacturing it|BE20155050A| BE1022700A9|2015-02-03|2015-02-03|Cylindrical foam body, use thereof and method of manufacturing it|
    CN201680014945.6A| CN107427135B|2015-02-03|2016-01-28|Cylindrical foam, use thereof and method for the production thereof|
    EA201791740A| EA031816B8|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing the same|
    KR1020177024533A| KR20170138392A|2015-02-03|2016-01-28|Cylindrical foam, its use and manufacturing method|
    PT16707371T| PT3253258T|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    TNP/2017/000343A| TN2017000343A1|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    UAA201708750A| UA121491C2|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    SI201630140T| SI3253258T1|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    ES16707371T| ES2701699T3|2015-02-03|2016-01-28|Cylindrical foam body, its use and method to produce it|
    RS20181520A| RS58262B1|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    TR2018/19219T| TR201819219T4|2015-02-03|2016-01-28|Cylindrical foam body, its use and method for its manufacture.|
    LTEP16707371.7T| LT3253258T|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    BR112017016741-7A| BR112017016741B1|2015-02-03|2016-01-28|cylindrical foam body, use of it and method to produce the same|
    EP16707371.7A| EP3253258B1|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    DK16707371.7T| DK3253258T3|2015-02-03|2016-01-28|CYLINDRICAL FOAM, USE THEREOF AND PROCEDURE FOR PREPARING THEREOF|
    US15/548,572| US10932587B2|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    CA2977671A| CA2977671C|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    PL16707371T| PL3253258T3|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    AU2016214983A| AU2016214983B2|2015-02-03|2016-01-28|Cylindrical foam body, use thereof and method for producing this|
    PCT/BE2016/000009| WO2016123680A1|2015-02-03|2016-02-02|Cylindrical foam body, use thereof and method for producing this|
    PH12017550071A| PH12017550071B1|2015-02-03|2017-08-03|Cylindrical foam body, use thereof and method for producing this|
    HRP20182093TT| HRP20182093T1|2015-02-03|2018-12-11|Cylindrical foam body, use thereof and method for producing this|
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