Peeling bar for shaving razor

Abstract

At least 30mm 2 A peeling bar (22) for a shaving razor (10) has a skin-contacting footprint area of ​​0.1 mm and comprises a material having a Shore A durometer greater than 50. The peeling bar has a plurality of skin-protruding elements (44) with tips (48) having a radius of 0.02 mm to 0.25 mm positioned within the skin-contacting footprint area. The skin-protruding elements have a front surface (54) that intersects the mean tip plane at an angle A1 between 80 degrees and 145 degrees. The volume isolated by a structural plane 0.1 mm below the tips of the skin-protruding elements divided by the skin-contacting footprint area is 1 mm. 2 0.003mm per footprint area 3 ~0.04mm 3 is.

Description

[Technical field]

[0001] The present invention relates to a peeling bar, and more particularly to a shaving razor laser having a peeling bar. [Background technology]

[0002] Razor cartridges typically include a guard in front of the blade and a cap behind the blade, with the guard and cap contacting the skin in front of and behind the blade, respectively. The guard and cap can help establish the "shaving geometry", a parameter that determines the orientation and position of the blade relative to the skin and greatly influences the shaving performance and shaving efficiency of the razor. The cap provides lubrication to the skin surface after contact with the blade. Certain razors may also include additional members in front of the razor to manage the skin before contact with the blade and stretch the skin to ensure optimal contact with the blade without unpleasant skin sensation. These skin contact members are typically variously shaped protrusions injection molded from elastomers to further improve skin tactility and stretch performance. The elastomeric protrusions are designed to stretch the skin and deform under typical shaving loads. Therefore, they may not provide sufficient exfoliation in front of the blade.

[0003] Exfoliation may generally be described as the removal of dead skin flakes or scales. The appearance and overall feel of the skin may be improved by exfoliation. Exfoliation may be achieved, for example, by the use of cosmetics containing abrasive particles or by rubbing the skin with an abrasive material such as a loofah. Exfoliation is generally known to enhance the tactile properties of wet shaving systems, for example, by providing a shaving system with a roughened guard surface. Summary of the Invention [Problem to be solved by the invention]

[0004] In wet-shaving type shaving systems, factors such as the frictional resistance of the razor across the skin, the force required to cut the hair, and irritation of existing skin lesions can result in some degree of shaving discomfort, especially when an exfoliant is incorporated as part of the shaving razor. Thus, a stripping bar is needed instead of, or in addition to, the guard (and skin tensioning member) that provides sufficient exfoliation but does not exacerbate shaving discomfort. [Means for solving the problem]

[0005] In one aspect, the present invention generally relates to a method for producing a cellular membrane comprising: 2 The present invention features a peel bar for a shaving razor having a skin contact footprint area of ​​0.02 mm to 0.25 mm and comprising a material having a Shore A durometer of greater than 50. The peel bar has a plurality of skin protruding elements with tips having a radius of 0.02 mm to 0.25 mm positioned within the skin contact footprint area. The skin protruding elements have a front surface that intersects the average tip plane at an angle of 80 degrees to 145 degrees. The volume isolated by a structural plane 0.1 mm below the tips of the skin protruding elements divided by the skin contact footprint area is greater than 1 mm. 2 0.003mm per footprint area 3 ~0.04mm 3 It is.

[0006] In another aspect, the invention generally features a shaving razor including a guard, a cap, and a shaving razor cartridge having at least one blade between the guard and the cap. A plurality of blades are positioned between the guard and the cap. A plurality of blades are between the guard and the cap. The blades have respective cutting edges that define a shaving plane. A peel bar is positioned forward of the guard, the peel bar extending at least 30 mm from the guard. 2and a material having a Shore A durometer of greater than 50. The peel bar has a plurality of skin protruding elements each having a tip with a radius of 0.02 mm to 0.25 mm positioned within the skin contact footprint area. The skin protruding elements have a front surface that intersects the shaving plane at an angle of 80 degrees to 145 degrees. The volume sequestered by a construction plane 0.1 mm below the tips of the skin protruding elements divided by the skin contact footprint area is greater than 1 mm. 2 0.003mm per footprint area 3 ~0.04mm 3 It is.

[0007] The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features and advantages of the invention will be apparent from the description and drawings, and from the claims. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a shaving razor. [Diagram 2] FIG. 2 is a front view of a shaving razor handle of the shaving razor of FIG. 1. [Diagram 3] FIG. 2 is a top view of a shaving razor cartridge. [Figure 4A] 4 is a top view of the peel bar of the shaving razor handle of FIG. 1 and the shaving razor cartridge of FIG. 3. [Figure 4B] FIG. 4B is an enlarged view of the peel bar of FIG. 4A. [Figure 5A] FIG. 3 is a cross-sectional view of the shaving razor cartridge taken generally along line 3-3 of FIGS. 1 and 3. [Figure 5B] FIG. 5B is an enlarged view of the shaving cartridge of FIG. 5A. [Figure 6] FIG. 13 is a close-up front view of the skin protruding element of the peel bar. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Referring to FIG. 1, one embodiment of the present invention is shown showing a shaving razor 10 having a shaving cartridge 12 mounted to a shaving razor handle 14. The handle 14 may have a gripping portion 15 having a distal end 17 to which the shaving cartridge 14 is mounted. The shaving cartridge 12 may include a housing 16 sized to receive at least one blade 18. The housing 16 may have a forward portion 20 with a stripping bar 22 positioned forward of the blades 18. A guard bar 24 may be positioned between the stripping bar 22 and the blades 18. The housing 16 may also have a rear portion 26 with a cap 28 positioned rearward of the blades 18. Although five blades 18 are shown, the shaving razor cartridge 12 may have more or fewer blades 18 depending on the desired performance and cost of the shaving razor 12.

[0010] The shaving cartridge 12 may be pivotally (i.e., rotation of the cartridge 12 about an axis relative to the shaving razor handle 14) and / or removably engaged to the shaving razor handle 14. It is understood that certain embodiments may include a shaving cartridge 12 that pivots relative to the handle 14 but is fixed to the razor handle 14 (i.e., not removably engaged to the razor handle 14). In this embodiment, when the blade 18 or blades 18 become dull, the entire shaving razor 10 may be discarded (i.e., a disposable razor). Disposable razors may have either a pivoting cartridge 12 or a non-pivoting cartridge 12.

[0011] The housing 16, the handle 14, and the peel bar 22 may be injection molded from a semi-rigid polymeric material. In certain embodiments, the housing 16 and / or the handle 14 may be molded from Noryl™, a blend of polyphenylene oxide (PPO) and polystyrene developed by General Electric Plastics (now SABIC Innovative Plastics). The housing 16, the peel bar 22, and / or the handle 14 may include a material having a Shore A hardness of greater than 50, such as from about Shore A 60 to about Shore D 100. Materials for the housing 16, the peel bar 22, and / or the handle 14 may include, but are not limited to, acrylonitrile butadiene styrene (ABS), polyoxymethylene (POM), polypropylene (PP), high impact polystyrene (HIPS), or any combination thereof. As described in more detail below, a peel bar 22 comprising a stiffer material that does not deform under shaving loads may provide additional shaving benefits. In certain embodiments, the peel bar 22 may be positioned between the guard 24 and one or more elastomeric protrusions 25 (e.g., fins). The elastomeric protrusions 25 may serve to stretch the skin during the shaving stroke to facilitate peeling of the skin for a more efficient shave.

[0012] Cap 28 may also be molded from the same material as housing 16. In certain embodiments, cap 28 may be molded from a lubricious polymeric material or shaving aid to provide lubrication to the surface of the skin during shaving. Alternatively, cap 28 may be a separate molded or extruded component that is assembled to housing 16. Cap 28 may be molded or extruded from the same material as housing 16, or may be molded or extruded from a more lubricious material having an effective amount of a water-weepable shaving aid composition to increase comfort during shaving.

[0013] FIG. 2 is a front view of the shaving razor handle 14 of the shaving razor 10 of FIG. 1. In certain embodiments, the peeling bar 22 may be part of the handle 14 and is attached to the shaving cartridge 12 (FIG. 1). The peeling bar 22 may be pivotally attached to the distal end 17 of the handle 14. Thus, the peeling bar 22 may pivot relative to the gripping portion 15 of the handle 14. The peeling bar 22 may be inserted into an opening 30 (e.g., in the housing 16) of the shaving cartridge 12 as shown in FIG. 1. Thus, the peeling bar 22 may be temporarily locked within the housing 16 to facilitate pivoting of the shaving cartridge 12 relative to the gripping portion 15 of the handle 14 during a shaving stroke. It may be desirable to incorporate the peeling bar 22 into the handle 14 rather than the shaving cartridge 12. For example, the peeling bar 22 may require a higher performance polymeric material to efficiently exfoliate the skin. Incorporating a higher performance polymeric material onto the shaving cartridge 12 may be very costly. Additionally, the incorporation of higher performance polymeric materials on the handle 14 allows the peeling bar 22 to be used over an extended life cycle (e.g., several years) as opposed to a shaving razor cartridge that may only be used for a month. Without being bound by theory, the incorporation of the peeling bar 22 into the pivot mechanism 32 (e.g., pin pivot or shell bearing) of the handle 14 allows the user to better control the pressure transmitted from the peeling bar 22 to the skin during shaving, thereby improving the user's ability to exfoliate without discomfort. However, it is understood that the peeling bar 38 may be incorporated into the shaving razor cartridge 40 as shown in the embodiment of FIG. 3. The shaving razor cartridge 40 may be substantially similar to the shaving cartridge 12, except that the peeling bar 38 is permanently incorporated into the housing 42 of the shaving razor cartridge 38 instead of into the handle.

[0014] 4A and 4B, front and close-up views of peel bars 22 and 38 are shown. One important aspect of peel bars 22 and 38 may be to provide a large area over which contact with the skin may be made during shaving, with the outer perimeter extending around the skin-contacting surface defining an area hereinafter referred to as the "footprint area." Peel bars 22 and 38 may be at least 30 mm wide which may allow for sufficient skin contact and peeling. 2 , more preferably about 90 mm 2 ~Approx. 110mm 2 In other embodiments, the skin contact footprint may be 110 mm for exfoliating and shaving larger body parts, such as the legs. 2 The skin protrusion elements 44 may be greater than 50. As described in more detail below, a larger skin contact area may also result in spreading out the pressure exerted on the skin by the skin protrusion elements 44 on the peel bars 22 and 38. The peel bars 22 and 38 and / or the skin protrusion elements 44 may comprise a material having a Shore A hardness greater than 50, as described above. Skin protrusions comprising softer materials may deform under typical shaving forces. Thus, the geometry of the skin protrusions may not be constant, which may adversely affect stripping performance. The skin protrusion elements 44 may comprise a polymeric material having a coefficient of friction of about 0.1 to about 0.6 (ASTM D3702, Dynamic Coefficient of Friction, 40 psi, 50 fpm). A lower coefficient of friction may improve the sliding of the peel bars 22 and 38, which may help reduce irritation, especially for harder materials, as more pressure may be exerted on the skin during the shaving stroke.

[0015] The skin protruding elements 44 may be spaced apart, as shown, or may be continuous elements extending along the length L1 of the footprint area. The distance L1 may be from about 15 mm to about 45 mm. The peel bars 22, 38 may have a width "w1" of from about 1 mm to about 6 mm. The skin protruding elements 44 may be spaced apart in staggered rows (e.g., the skin protruding elements 44 in one row overlap with the skin protruding elements 44 in the row immediately preceding and following it). In certain embodiments, the skin protruding elements 44 may be spaced apart within a row by a distance "d1" of from about 1 mm to about 3 mm. The skin protruding elements 44 may be spaced apart from the skin protruding elements 44 in the immediately adjacent row by a distance "d2" of from about 1 mm to about 3 mm. The distance between the skin protruding elements 44 may be calculated from the centers 46 of the tips 48 (i.e., the uppermost top surfaces) of the skin protruding elements 44. The plurality of skin protruding elements 44 may have a pair of sloping sides 50 and 52 that extend to a tip 48. The tip may have a radius in the shaving direction of about 0.02 mm to 0.25 mm, more preferably about 0.05 mm to 0.15 mm. The front surface 54 and / or rear surface 56 of the plurality of skin protruding elements 44 may be semicircular.

[0016] The skin protruding elements 44 may extend from the lower surface 58 of the peeling bars 22 and 38 to the tips 48 a distance of about 0.15 mm to about 0.4 mm. In certain embodiments, adjacent skin protruding elements 44 may be spaced apart to define a gap 60 having a width "w2" of about 0.15 mm to about 0.6 mm. The gap 60 facilitates cleaning of the peeling bar and also manages hair during a shaving stroke, whereby the protruding elements better brush dead skin and debris away from around the hair, resulting in a more efficient and closer shave. The skin protruding elements 44 may not deflect under typical shaving conditions, and thus the gap 60 may not decrease in size or be covered by adjacent skin protruding elements 44. Thus, the stiffness of the polymeric material of the skin protruding elements 44 helps maintain a consistent geometry of the gap 60 and the skin protruding elements 44.

[0017] Referring to FIG. 5A, a cross-sectional view generally along line 5-5 of FIG. 1 is shown. Because FIG. 5 shows the shaving cartridge 14 with the peeling bars 22 and 38, it is understood that FIG. 5 also represents a cross-sectional view generally along line 5-5 of FIG. 3. The one or more blades 18 may each have a cutting edge 62 that defines a shaving plane P1. In certain embodiments, the plane P2 of the front surface 54 of one or more of the skin protruding elements 44 may intersect with the shaving plane at an angle "A1" of about 80 degrees to 145 degrees. The angle "A1" may also be calculated from the intersection of the average tip plane P3 (i.e., a plane created from the average position of all the tips 48 of the skin protruding elements 44) with the plane P2 of the front surface 54. In certain embodiments, the average tip P3 plane may extend along the shaving plane P1.

[0018] Referring to FIG. 5B, an enlarged view of the shaving cartridge 12 of FIG. 5A is shown. The peeling bars 22 and 38 are spaced from the guard 24 to define an elongated gap 64 that extends along the length of the peeling bar 22 and has a depth of about 0.2 mm to about 1.0 mm from the tip 48 of the skin-contacting element closest to the guard 24 to the bottom surface 66 of the gap 64. The gap 64 may have a width "w3" of about 0.2 mm to about 2 mm. In certain embodiments, the tip 48 of the skin-protruding element 44 may be about 0.2 mm below to about 0.3 mm above the plane P5 of the top surface 68 of the guard 24. In certain embodiments, the tip 48 may be about 0.1 mm above to about 0.1 mm below the plane P5 to balance stripping performance and comfort.

[0019] 6, an enlarged front view of one of the skin protruding elements 44 is shown. The structural plane "CP" may isolate a volume that is approximately 0.1 mm below the tip 48 of the skin protruding element 44. The volume isolated by the structural plane "CP" divided by the skin contact footprint area is 1 mm 2 Approximately 0.003 mm per footprint area 3 ~0.04mm 3Without being bound by theory, it is noted that the construction plane represents the approximate depth at which the skin protruding elements 44 (e.g., front surfaces 54) will press into the skin and thus engage the skin for ablation.

[0020] The dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm." Furthermore, dimensions should not be held to an impossibly high standard of fidelity that does not allow for deviations due to typical manufacturing tolerances. Thus, the term "about" should be interpreted to be within typical manufacturing tolerances.

[0021] All documents cited herein, including any cross-referenced documents or related patents or applications, are incorporated herein by reference in their entirety unless expressly excluded or specifically limited. The citation of any document shall not be deemed to be prior art to any invention disclosed or claimed herein, or to teach, suggest or disclose such invention, either alone or in combination with any other reference(s). Furthermore, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall apply.

[0022] While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

1. 1. A shaving razor, a shaving razor cartridge having a guard, a cap, and at least one blade between said guard and said cap; a plurality of blades between the guard and the cap, the blades having respective cutting edges defining a shaving plane; a peel bar positioned forward of the guard, At least 30 mm 2 and a Shore A durometer of greater than 50; a plurality of skin protruding elements each having a tip with a radius of 0.02 mm to 0.25 mm positioned within said skin contact footprint area, said skin protruding elements having a front surface that intersects said shaving plane at an angle of 80 degrees to 145 degrees, said volume separated by a construction plane 0.1 mm below said tip of said skin protruding elements divided by said skin contact footprint area being less than 1 mm 2 0.003 mm per footprint area 3 ~0.04mm 3 and a peel bar comprising a plurality of skin protruding elements, the plurality of skin protruding elements do not deform under shaving loads; The plurality of skin protruding elements are positioned along a length of the skin contact footprint area to form a plurality of rows, the plurality of skin protruding elements being arranged in the plurality of rows such that the skin protruding elements forming a first row overlap the skin protruding elements forming a second row adjacent to or immediately preceding the first row. Shaving razor.

2. 10. The shaving razor of claim 1 further comprising a handle having a gripping portion and a distal end, said peeling bar being attached to said distal end.

3. 3. The shaving razor of claim 1 or 2, wherein the shaving razor cartridge defines an opening, and the peel bar is positioned within the opening.

4. the peel bar is spaced from the guard to define an elongated gap, the gap extending along a length of the peel bar and having a depth of between 0.2 mm and 1.0 mm; The shaving razor according to any one of claims 1 to 3.

5. The shaving razor cartridge further comprises one or more elastomeric protrusions; the peel bar is positioned between the guard and the one or more elastomeric protrusions. The shaving razor according to any one of claims 1 to 4.

6. the tips of the skin protruding elements are positioned 0.1 mm below to 0.1 mm above the plane of the top surface of the guard; The shaving razor according to any one of claims 1 to 5.

7. the plurality of skin protruding elements are spaced apart distinct elements; A shaving razor according to any one of claims 1 to 6.

8. the front surface of the plurality of skin protruding elements is semicircular; A shaving razor according to any one of claims 1 to 7.

9. the plurality of skin protruding elements are spaced apart to define gaps having a width between 0.15 mm and 0.6 mm; A shaving razor according to any one of claims 1 to 8.

10. the plurality of skin protruding elements comprising polyoxymethylene; A shaving razor according to any one of claims 1 to 9.

11. The plurality of skin-protruding elements have a pair of sloping sides extending to the tip. A shaving razor according to any one of claims 1 to 10.

12. the plurality of skin protruding elements form a plurality of offset rows. A shaving razor according to any one of claims 1 to 11.

13. The radius of the tip is 0.05 mm to 0.15 mm. A shaving razor according to any one of claims 1 to 12.

14. the front surface intersects the mean tip plane at an angle between 90 degrees and 125 degrees; A shaving razor according to any one of claims 1 to 13.

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