WO1996005949B1

WO1996005949B1 - Razor cartridge with apertures and manufacturing method

Info

Publication number: WO1996005949B1
Application number: PCT/US1995/010688
Authority: WO
Filing date: 1995-08-22
Publication date: 1996-03-28

Abstract

A shaving cartridge including spaced-apart first (23) and second (25) razor blades each having an elongated edge (31, 33) formed thereon for cutting and shaving whiskers and hair, a container for retaining the blades therein and presenting the cutting edges at an angle for shaving action against the skin, the cartridge having formed therein a pass through aperture (47) between the blades allowing passage of shaved material away from the cutting edge to allow movement of the blade over the skin free of accumulations of cut material.

Claims

AMENDED CLAIMS[received by the International Bureau on 14 February 1996 (14.02.96); original claims 1 and 3-6 amended; remaining claims unchanged (3 pages)]

1. A shaving device comprising: a) first and second razor blades in spaced-apart arrangement having elongated edges formed thereon for cutting and shaving whiskers and hair; and, b) cartridge means for retaining said blades therein and presenting said cutting edges at an angle for shaving action against the skin, wherein said cartridge means includes a frontless and backless hollow container defined by spaced-apart, elongated cap and base and spaced-apart, shorter side walls, said cap, said base and said walls joined together to form a rigid structure wherein said cap and base are further supported by at least one stub passing therebetween containing a monolithic spacer which is affixed to and is an integrally-formed part of said stub to provide additional support thereto and to said razor blades and to form a pass-through aperture between said blades allowing passage of shaved material away from said cutting edges to allow movement of said blade over the skin free of accumulations of cut material.

2. The shaving cartridge of Claim 1 wherein said cap and base are supported by three stubs, spaced equally apart, each containing one of said spacers to provide additional support thereto and to said razor blades.

3. The shaving cartridge of Claim 1 wherein said spacer is formed from an upset on each of said stubs, said upset defined by spaced-apart, parallel and flat landings that are in contact with the inwardly-facing surfaces of said razor blades and wherein upset forms the sides of said pass-through apertures.

4. The shaving cartridge of Claim 2 wherein said spacers are formed from an upset on each said stubs, said upset defined by spaced-apart, parallel and flat landings that are in contact with the inwardly-facing surfaces of said razor blades and wherein said upsets form the sides of said pass-through apertures.

5. A shaving cartridge comprising: a) first and second razor blades, each having an elongated edge formed therealong for cutting and shaving whiskers and hair; and, b) cartridge means for retaining said blades therein in spaced-apart arrangement and presenting said cutting edges for shaving action; c) said cartridge means including a frontless and backless hollow container defined by spaced-apart, elongated cap and base and spaced-apart, shorter side walls joined together to form a rigid structure wherein said cap and base are further supported by a plurality of stubs passing therebetween; d) said razor blades being retained in said container and fixed therein to provide a plurality of spaced-apart cutting edges for shaving action wherein said stubs have formed thereon at least one spacer of larger size to aid in retaining said razor blades in spaced-apart arrangement; e) said cartridge forming pass-through apertures between said blades and defined by the surfaces of said blades and the surfaces of said spacers; f) wherein said second blade is further supported at its respective ends by interfitting with a shoulder formed in the inner surfaces of said side walls.

6. A method of making a shaving cartridge containing two elongated razor blades comprising the steps of: a) providing a base having a length greater than the length of the razor blades and defining a working surface thereon; b) forming a plurality of upwardly extending side walls at the terminal ends of said base and a plurality of upwardly directed stubs on said working surface spaced equally therebetween; c) placing a first, thin, flat razor blade over said working surface, said blade having formed therein apertures for alignment on said stubs, the cutting edge of said razor blade being set at an angle to the front edge of said base for shaving purposes; d) forming an upset in each said stub above said first razor blade of a size larger than the apertures formed in said first and second razor blades; e) depositing said second, thin, flat razor blade on said stubs above said upsets and arranging the cutting edge thereof to lie in close proximity with the cutting edge of said first blade so that pass-through apertures are formed between said upsets and the facing surfaces of said blades; f) providing a cap defining a substantially flat working surface of size and shape similar to said working surface of said base and assembling it atop said second razor to form a frontless and backless hollow container surrounding said razor blades and said pass-through apertures; and, g) assembling said container into a rigid form for attachment to a handle thereto for controlled manipulation of said cutting edges about the area to be shaved.

7. The method of Claim 6 further including die step of forming a shoulder in said side walls, above said first razor blade, extending outward from said side wall for support of said second razor blade in its assembly therein.

8. The method of Claim 7 wherein the step of forming a shoulder in said side walls comprises the step of molding at least one notch in said side wall and the following step of cold pressing said notch to deform some of the side wall to form a shoulder extending outward from said side wall into said container.

9. The method of Claim 6 wherein said step of forming said upsets is replaced with a step of providing spacers in the form of washers separately assembled over said stubs to retain said razor blades in spaced-apart relationship and define said pass-through apertures.

10. A method of making a shaving cartridge containing two elongated razor blades, comprising the steps of: providing a base with a plurality of outwardly-directed elongated stubs; placing a first razor blade with a plurality of apertures defined therein onto the stubs with the stubs extending through the apertures; deforming at least one of the stubs to form a spacer on the stub at a location on the stub distally-spaced from the base to be on the opposite side of the first razor blade from the base; placing a second razor blade with a plurality of apertures defined therein onto the stubs with the stubs extending through the apertures; and placing a cap onto the stubs to form the assembled shaving cartridge.

11. A method as defined in claim 10, wherein the deforming step includes pressing the stub toward the base.

12. A method as defined in claim 10, wherein the deforming step includes forming a doughnut-shaped spacer having a diameter greater than the diameter of the apertures in the first razor blade to securely fasten the first razor blade to the base.

13. A method as defined in claim 12, wherein the cap includes a plurality of apertures defined therein, and wherein the placing the cap onto the stubs step includes placing the cap so that the stubs extend through the apertures, and wherein the stubs are further deformed to securely fasten the cap to the base.