Claims
- 1. A safety razor blade unit having at least one elongate blade, and a skin engaging member defining a surface for contact with the skin during shaving, said surface being defined by spaced hollow projections extending upwardly from a base and open at their upper ends, each said spaced, hollow projection having a continuous wall that is spaced from walls of adjacent projections and extends all of the way around an internal hollow region from said base to said upper end, the projections being formed of resiliently flexible material whereby the upper ends of the projections can be deflected locally under forces encountered during shaving, wherein the height of the projections above the base is greater than or equal to 0.38 mm.
- 2. A safety razor blade unit according to claim 1, wherein the projections are arranged on the base in a geometric pattern.
- 3. A safety razor blade unit according to claim 1, wherein the projections are arranged in at least one row extending along the base in a direction generally parallel to the blade edge(s).
- 4. A safety razor according to claim 3, wherein there are at least three parallel rows of projections, and the projections in one row are longitudinally offset with respect to the projections of an adjacent row.
- 5. A safety razor blade unit according to claim 1, wherein the upper end faces of the projections are inclined downwardly and forwardly towards the base.
- 6. A safety razor blade unit according to claim 1, wherein the external edges at the upper ends of the projections are rounded off at the fronts of the projections.
- 7. A safety razor blade unit according to claim 1, wherein the hollow interiors of the projections taper along the projections.
- 8. A safety razor blade unit according to claim 7, wherein the hollow interiors taper towards the base.
- 9. A safety razor blade unit according to claim 1, wherein the projections have a wall thickness at the base, to height ratio in the range of 1:1 to 1:15, preferably about 1:7.5.
- 10. A safety razor blade unit according to claim 1, wherein the projections are substantially circular in cross-section.
- 11. A safety razor blade unit according to claim 1, wherein the projections have a cross-sectional shape selected from square or D shape.
- 12. A safety razor blade unit having at least one elongate blade, and a skin engaging member defining a surface for contact with the skin during shaving, said surface being defined by spaced hollow projections extending upwardly from a base and open at their upper ends, each said spaced, hollow projection having a continuous wall that is spaced from walls of adjacent projections and extends all of the way around an internal hollow region from said base to said upper end, the projections being formed of resiliently flexible material whereby the upper ends of the projections can be deflected locally under forces encountered during shaving,wherein the projections are arranged in at least one row extending along the base in a direction generally parallel to the blade edge(s), wherein there are at least three parallel rows of projections, and the projections in one row are longitudinally offset with respect to the projections of an adjacent row, wherein the projections have an external dimension measured longitudinally of a row which is greater than the spacing between adjacent projections in the same row.
- 13. A safety razor blade unit having at least one elongate blade, and a skin engaging member defining a surface for contact with the skin during shaving, said surface being defined by spaced hollow projections extending upwardly from a base and open at their upper ends, each said spaced, hollow projection having a continuous wall that is spaced from walls of adjacent projections and extends all of the way around an internal hollow region from said base to said upper end, the projections being formed of resiliently flexible material whereby the upper ends of the projections can be deflected locally under forces encountered during shaving,wherein the projections have the form of tubes with an outside diameter in the range of 0.40 to 3.00 mm.
- 14. A safety razor blade unit according to claim 13, wherein the outer diameter is in the range of 0.6 mm to 0.8 mm.
- 15. A safety razor blade unit having at least one elongate blade, and a skin engaging member defining a surface for contact with the skin during shaving, said surface being defined by spaced hollow projections extending upwardly from a base and open at their upper ends, each said spaced, hollow projection having a continuous wall that is spaced from walls of adjacent projections and extends all of the way around an internal hollow region from said base to said upper end, the projections being formed of resiliently flexible material whereby the upper ends of the projections can be deflected locally under forces encountered during shaving,wherein the projections have walls of substantially constant thickness along the projections.
- 16. A safety razor blade unit having at least one elongate blade, and a skin engaging member defining a surface for contact with the skin during shaving, said surface being defined by spaced hollow projections extending upwardly from a base and open at their upper ends, each said spaced, hollow projection having a continuous wall that is spaced from walls of adjacent projections and extends all of the way around an internal hollow region from said base to said upper end, the projections being formed of resiliently flexible material whereby the upper ends of the projections can be deflected locally under forces encountered during shaving,wherein the height of the projections above the base is in the range of 0.38 mm to 1.5 mm.
- 17. A safety razor blade unit according to claim 16, wherein the height of the projections is about 0.75 mm.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9600620 |
Jan 1996 |
GB |
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Parent Case Info
This is a continuation of copending application International Application PCT/US97/00407 filed on Jan. 8, 1997 and which designated the U.S., claims the benefit thereof and incorporates the same by reference.
US Referenced Citations (16)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0397638 |
Nov 1990 |
EP |
673 449 |
Jul 1979 |
SU |
9635558 |
Nov 1996 |
WO |
Non-Patent Literature Citations (1)
Entry |
Reference is made to co-pending U.S. Ser. No. 09/141,436, as discussed in the I.D.S. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/US97/00407 |
Jan 1997 |
US |
Child |
09/113460 |
|
US |