• 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:
    SHAVING OR SHAPPING BLADES THAT HAVE A LARGE POINT RAY The present invention relates to a shaving or shaving blade that includes a substrate with a coating attached to the substrate that defines a coated blade. The coated blade includes a cutting edge that is defined by a blade tip that has a tip radius of 500 to 1500 angstroms. The coated slide has a thickness of between 0.3 and 0.5 micrometer measured at a distance of 0.25 micrometer from the tip of the slide, a thickness of between 0.4 and 0.65 micrometer measured at a distance of 0.5 micrometer of the blade tip, a thickness of between 0.61 and 0.71 micrometer measured at a distance of 1 micrometer from the blade tip, a thickness of between 0.96 and 1.16 micrometer measured at a distance of 2 micrometers from the blade tip, and a thickness of between 1.56 and 1.91 micrometer measured at a distance of 4 micrometers from the blade tip.
    公开号:BR112014000202B1
    申请号:R112014000202-9
    申请日:2012-07-13
    公开日:2021-01-19
    发明作者:Ashok B. Patel；Jeffrey S. Parker；Bin Shen；Kenneth J. Robis；Matthew R. Stone；John J. Nisby；Jason S. Slattery；Yongqing Ju
    申请人:The Gillette Company；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] This invention relates to razors or shavers and more particularly to razors or shavers with sharp and durable cutting edges that have large nose radii and a narrow profile. BACKGROUND OF THE INVENTION
    [002] A razor or shaving blade is typically formed from a suitable substrate material such as stainless steel, and a cutting edge is formed with a wedge-shaped configuration with an end point with a given radius. Rigid coatings such as diamond, amorphous diamond, diamond-like carbon material (Diamond Like Carbon, or DLC), nitrides, carbides, oxides or ceramics are often used to optimize strength, corrosion resistance and the ability to shave or wax, while maintaining necessary strength while allowing thinner edges to be used with lower cutting forces. Polytetrafluoro ethylene (PTFE) can be used to provide friction reduction. Layers of materials containing niobium or chromium can help improve the bond between the substrate, typically stainless steel, and rigid carbon coatings, such as DLC.
    [003] It is desirable to change the shape of the razor or epilator to obtain a razor or epilator with a small cutting force, while improving safety and comfort. With the ideal cutting edge design it is possible to provide a small cutting force blade that is safer on the skin leading to a more comfortable shave or epilation.
    [004] The blades of the prior art increased the comfort of shaving or waxing by reducing the radii of the tips and general cross section of the profile, by reducing the handling effort associated with cutting through the hair. Sharper edges, however, required special implementation to avoid the discomfort associated with interactions between the blade and the skin. In addition, as a consequence of the thinning of the chamfered profile of the blade, strength and durability were compromised.
    [005] The present invention discusses the problems of the desired balance between small cutting force, greater safety and greater comfort. The present invention provides a blade tip that has a wider forward profile close to the blade tip with a large nose radius and at the same time maintains a narrow profile away from the blade tip.
    [006] The large nose radius in conjunction with a narrow blade profile provides a small cutting force blade edge that is less likely to engage the skin, allowing the skin to slide relative to the edge without causing small incisions, cuts or scraping. The blade of the present invention reduces irritation and increases comfort. SUMMARY OF THE INVENTION
    [007] The present invention provides a shaving or shaving blade that comprises a substrate with a coating attached to the substrate defining a coated blade. The coated blade has a cutting edge that is defined by a blade tip that has a tip radius of 500 to 1500 angstroms. The coated slide has a thickness of between 0.3 and 0.5 micrometer measured at a distance of 0.25 micrometer from the tip of the slide, a thickness of between 0.4 and 0.65 micrometer measured at a distance of 0.5 micrometer of the blade tip, a thickness of between 0.61 and 0.71 micrometer measured at a distance of 1 micrometer from the blade tip, a thickness of between 0.96 and 1.16 micrometer measured at a distance of 2 micrometers from the blade tip, and a thickness of between 1.56 and 1.91 micrometer measured at a distance of four micrometers from the blade tip.
    [008] Preferably, the coated slide has a thickness of between 2.66 and 3.16 micrometers measured at a distance of 8 micrometers from the tip of the slide, and a thickness of between 4.06 and 5.06 micrometers measured at a distance of 16 micrometers from the blade tip.
    [009] Preferably, the substrate is a martensitic stainless steel that has a carbide density of 200 to 1000 carbides per 100 square micrometers as determined by the optical microscopic cross section.
    [0010] Preferably, the blade tip has a tip radius of 700 to 1200 angstroms.
    [0011] The coating may comprise an adhesive layer attached to the substrate. The adhesive layer may comprise niobium.
    [0012] The coating may comprise a layer of rigid coating attached to the adhesive layer. The hard coating layer may comprise an amorphous material containing carbon.
    [0013] The coating may comprise an external coating layer joined to said rigid coating layer. The outer coating layer may comprise chromium.
    [0014] A slippery substance can be applied to the outer coating layer. The slippery material can comprise a polymer. The slippery material may comprise polytetrafluoro ethylene. DESCRIPTION OF THE DRAWINGS
    [0015] Although the specification ends with claims that specifically point out and claim in a different way the subject that is considered in the present invention, it is believed that the present invention will be understood more fully with the description below, together with the attached drawings.
    [0016] Figure 1 is a diagrammatic view illustrating a razor or shaving razor of the present invention.
    [0017] Figure 2 is a diagrammatic view of the razor or shaving blade in Figure 1.
    [0018] Figure 3 is a view of a coated razor or shaving blade that illustrates the method for determining the radius of the coated blade tip. DETAILED DESCRIPTION
    [0019] Now with reference to Figures 1 and 2, there is shown a shaving or shaving blade 10 including a substrate 11 with a coating 30 attached to the substrate 11 resulting in a coated blade 13. The coating 30 can include one or more layers. The coating 30 shown includes an adhesive layer 34, a hard coating layer 36 and an outer coating layer 38. Substrate 11 is typically produced from stainless steel, although other materials can be employed.
    [0020] Adhesive layer 34 is used to facilitate the bonding of hard coating layer 36 to substrate 11. Examples of suitable adhesive layer materials are materials containing niobium, titanium and chromium. The adhesive layer can have a thickness of 100 angstroms to 500 angstroms. A particular adhesive layer is produced from niobium with a thickness of 150 angstroms to 350 angstroms. PCT 92/03330 describes the use of niobium as an adhesive layer.
    [0021] The hard coating layer (or layers) 36 provides enhanced strength, corrosion resistance and shaving or waxing capacity and can be produced from materials containing fine, micro or nano-crystalline carbon (eg diamond, diamond amorphous or DLC), nitrides (eg, boron nitride, niobium nitride, chromium nitride, zirconium nitride or titanium nitride), carbides (eg silicon carbide), oxides (eg alumina, zirconia) , other ceramic materials (including nanolayers or nanocomposites), metals or metal alloys. Carbon-containing materials can be doped with other elements, such as tungsten, titanium, silver or chromium, by including these additives, for example, in the target during application by ion bombardment. Materials can also incorporate hydrogen, for example, hydrogenated DLC. Preferably, the hard coating layer 36 is produced from diamond, amorphous diamond or DLC. A specific modality includes DLC less than 5,000 angstrons, preferably from 300 angstroms to 3,000 angstrons. DLC layers and deposition methods are described in U.S. Patent No. 5,232,568. As described in "Handbook of Physical Vapor Deposition (PVD) Processing", "DLC" is an amorphous carbon material that exhibits many of the desirable properties of the diamond, but does not have the crystalline structure of the diamond.
    [0022] The outer coating layer 38 can be used to facilitate the bonding of a slippery material to the outer coating layer 38 of the hard coating which is preferably produced from chromium-containing material, for example, chromium alloys or chromium or chromium compounds that are compatible with polytetrafluoroethylene, for example, CrPt. The specific outer coating layer is chrome with a thickness of 100 to 200 angstroms. The outer coating layer can be 50 angstrons to 500 angstrons thick, preferably 100 angstrons to 300 angstrons. Other materials can be used in the outer coating layer 38 to facilitate the adhesion of specific slippery materials.
    [0023] Slippery material 40 can be used to provide reduced friction. The thickness of the slippery material 40 is, of course, ignored for the purpose of calculating the dimensions of the coated sheet 13. The slippery material 40 can be a polymer composition or a modified polymer composition. The polymer composition can be polyfluorocarbon. A suitable polyfluorocarbon is polytetrafluoro ethylene, sometimes called a telomer. A particular polytetrafluoro ethylene material is Krytox LW 2120, available from DuPont. This material is a non-flammable and stable dry lubricant, consisting of small particles that produce stable dispersions. The material is supplied as an aqueous dispersion of about 20% solids, by weight, and can be applied by dipping, spraying or brushing, and can then be air dried or coated by melting. The slippery material is preferably less than 5,000 angstroms in thickness and can typically be 1,500 to 4,000 angstroms thick, and can be as thin as 100 angstroms, as long as a continuous coating is maintained. As long as a continuous coating is obtained, a reduction in the thickness of the telomere coating can provide improved results in the first shave or epilation. U.S. patents numbers 5,263,256 and 5,985,459, which are incorporated herein by reference, describe techniques that can be used to reduce the thickness of an applied telomer layer.
    [0024] The coated blade 13 includes a sharp wedge-shaped edge that has a blade tip 12 with facets 14 and 16 that diverge from the blade tip 12. The blade tip 12 preferably has a radius of 500 to 1500 angstrons. Preferably, the tip of the blade 12 has a tip radius of 700 to 1200 angstroms. Now with reference to Figure 3, the radius of the tip is determined by first drawing a line 60 that divides the coated blade 13 in half. Where line 60 bisects coated sheet 13, a first point 65 is drawn. A second line 61 is drawn perpendicular to line 60 at a distance of 125 angstroms from point 65. Where line 61 bisects the coated blade 13 two additional points 66 and 67 are drawn. A circle 62 is then constructed from the points 65, 66 and 67. The radius of circle 62 is the radius of the tip of the coated slide 13.
    [0025] Again with reference to Figures 1 and 2, the coated slide 13 has a thickness 21 of between 0.3 and 0.5 micrometer measured at a distance 20 of 0.25 micrometer from the tip of the slide 12. The coated slide 13 has a thickness 23 of between 0.4 and 0.65 micrometer measured at a distance 22 of 0.5 micrometer from the tip of the blade 12. The coated blade 13 has a thickness 25 of between 0.61 and 0.71 micrometer measured at a distance 24 of 1 micrometer from the tip of the blade 12. The coated blade 13 has a thickness 27 of between 0.96 and 1.16 micrometer measured at a distance 26 of 2 micrometers from the tip of the blade 12. The coated blade 13 has a thickness 29 of between 1.56 and 1.91 micrometer measured at a distance 28 of 4 micrometers from the tip of the blade 12.
    [0026] Preferably, the coated blade 13 maintains a narrow profile further away from the blade tip 12. The coated blade 13 preferably has a thickness 31 of between 2.66 and 3.16 micrometers measured at a distance 30 of 8 micrometers of the tip of the blade 12. The coated blade 13 preferably has a thickness 33 of between 4.06 and 5.06 micrometers measured at a distance 32 of 16 micrometers from the tip of the blade 12.
    [0027] The thicknesses provide a structure for an improved shaving or epilation. Thicknesses provide a balance between edge strength and small cutting or sharpening force. A blade with smaller thicknesses will have a greater force, possibly leading to a failure of the edge edge if the force is excessively low. A blade with greater thicknesses will have a greater cutting force, resulting in greater handling effort and greater discomfort for the user during shaving or epilation.
    [0028] A substrate material 11 that can facilitate the manufacture of an appropriately sharp edge is a martensitic stainless steel with smaller and more finely distributed carbides, but with a similar overall weight percentage of carbon. A finely distributed carbide material produces more rigid and brittle substrates after the tempering process, and makes it possible to manufacture a thinner and more resistant edge. An example of such a substrate material is a martensitic stainless steel with a more uniform average carbide size and a carbide density of 200, 300, 400 carbides per 100 square micrometers, at 600, 800, 1000 carbides or more per 100 square micrometers , as determined by the optical microscopic cross section.
    [0029] The shaving or shaving blade 10 is made, in general, according to the processes described in the aforementioned patents. A particular embodiment includes an adhesive layer of niobium 34, a hard coating layer in DLC 36, an external coating layer in chrome 38, and a slippery material in ethylene polytetrafluoro 40 known as Krytox LW 2120. The external coating layer in chrome 38 is deposited with a minimum of 100 angstrons and a maximum of 500 angstrons. The layer is deposited by ion bombardment using a DC polarization (more negative than -50 volts and, preferably, more negative than -200 volts) and a pressure of about 0.27 Pa (2 millitorr) of argon. The shaving or shaving blade 10 preferably has a tip radius of 500 to 1500 angstroms.
    [0030] The radius of the tip and the facet profile of the blade of the present invention provide an improvement in terms of sharpening and safety of the blade, and comfort of shaving or waxing. The shaving or shaving blade 10 of the present invention solves the problems of the desired balance between small cutting force, greater safety and greater comfort. The blade tip has a large nose radius, while maintaining a narrow profile away from the blade tip. The large nose radius provides an edge that is less likely to engage the skin, allowing the skin to slide relative to the edge without causing small incisions, cuts or scraping, while the narrow blade profile provides a cutting edge of the cutting force little. The blade of the present invention reduces irritation and increases comfort.
    [0031] The dimensions and values presented in the present invention should not be understood as being strictly limited to the exact numerical values mentioned. Instead, unless otherwise specified, each of these dimensions is intended to mean both the mentioned value and a range of functionally equivalent values around that value. For example, a dimension displayed as "40 mm" is intended to mean "about 40 mm".
    [0032] All of the documents cited in the Detailed Description of the Invention are, in their relevant part, incorporated herein by way of reference. The citation of any document should not be interpreted as an admission that it represents prior art with respect to the present invention. If there is a conflict between any meaning or definition of a term mentioned in this document and the meaning or definition of the same term in a document incorporated by reference, the meaning or definition attributed to the term mentioned in this document will take precedence.
    [0033] Although specific embodiments of the present invention have been illustrated and described, it should be obvious to those skilled in the art that various other changes and modifications can be made without departing from the character and scope of the invention. Therefore, it is intended to cover in the appended claims all such changes and modifications that fall within the scope of the present invention.
    权利要求:
    Claims (13)
    [0001]
    1. Razor or shaving blade characterized by the fact that it comprises: a substrate with a coating attached to said substrate that defines a coated blade, said coated blade comprising a cutting edge that is defined by a blade tip that has a radius from the tip of 500 to 1500 angstrons, the said coated blade having a thickness of between 0.3 and 0.5 micrometer measured at a distance of 0.25 micrometer from the tip of the blade, a thickness of between 0.4 and 0 , 65 micrometer measured at a distance of 0.5 micrometer from the blade tip, a thickness of between 0.61 and 0.71 micrometer measured at a distance of 1 micrometer from the blade tip, a thickness of between 0.96 and 1 , 16 micrometer measured at a distance of 2 micrometers from the blade tip, and a thickness of between 1.56 and 1.91 micrometer measured at a distance of 4 micrometers from the blade tip.
    [0002]
    2. Razor or shaving blade according to claim 1, characterized by the fact that the substrate is a martensitic stainless steel that has a carbide density of 200 to 1000 carbides per 100 square micrometers as determined by the optical microscopic cross section.
    [0003]
    3. Razor or shaving razor according to claim 1, characterized by the fact that the tip of the razor has a tip radius of 700 to 1200 angstroms.
    [0004]
    Shaving or shaving razor according to claim 1, characterized in that said coating comprises an adhesive layer attached to said substrate.
    [0005]
    5. Razor or shaving razor according to claim 4, characterized by the fact that said adhesive layer comprises niobium.
    [0006]
    6. Shaving or shaving blade according to claim 4, characterized in that said coating comprises a layer of rigid coating attached to said adhesive layer.
    [0007]
    7. Shaving or shaving blade according to claim 6, characterized in that said hard coating layer comprises a material that contains carbon.
    [0008]
    Shaving or shaving blade according to claim 6, characterized in that said coating comprises an outer coating layer joined to said rigid coating layer.
    [0009]
    9. Shaving or shaving razor according to claim 8, characterized by the fact that said external coating layer comprises chromium.
    [0010]
    10. Shaving or shaving razor according to claim 8, characterized by the fact that a slippery material is attached to said outer coating layer.
    [0011]
    Shaving or shaving razor according to claim 10, characterized in that said slippery material comprises a polymer.
    [0012]
    Shaving or shaving blade according to claim 10, characterized in that said slippery material comprises polytetrafluoro ethylene.
    [0013]
    13. Razor or shaving razor according to claim 1, characterized by the fact that said coated razor has a thickness of between 2.66 and 3.16 micrometers measured at a distance of 8 micrometers from the tip of the razor, and a thickness of between 4.06 and 5.06 micrometers measured at a distance of 16 micrometers from the tip of the slide.
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    引用文献:
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    法律状态:
    2019-07-16| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-02| B07A| Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]|
    2020-12-15| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-01-19| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/07/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161507704P| true| 2011-07-14|2011-07-14|
    US61/507,704|2011-07-14|
    PCT/US2012/046577|WO2013010049A1|2011-07-14|2012-07-13|Razor blades having a large tip radius|
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