Guarded razor edge apparatus

Claim 2

In a safety razor blade having a flat base structure, and an elongated cutting edge integral with a side of the razor blade base structure, a guarded cutting edge comprising a multiplicity of separate elongated metal thread-like guard members bent into substantially V-shaped form wherein each guard member defines a pair of relatively short ends converging at a rounded corner section, the guard members being fitted over the blade cutting edge and spaced substantially equidistantly apart along the blade cutting edge with their rounded corner sections protruding forward of the blade cutting edge, and means for independently providing rigid and permanent attachment of the respective ends of each guard member to the razor blade base structure at points relatively close to the blade cutting edge to support the guard members in a substantially fixed relation relative to the blade cutting edge.

Claim 3

A guarded cutting edge according to claim 1 wherein the ends of the guard members are secured to the blade by spaced apart spot welds on each side oF the blade edge.

Claim 4

A guarded cutting edge according to claim 1 wherein the edge of the razor blade base structure defines a pair of flanks converging outwardly to a point, and wherein the respective ends of each guard member are permanently secured to the respective flanks of the blade base structure.

Claim 5

A guarded cutting edge according to claim 1 wherein the guard members adjacent to the end portions of the razor blade base structure are spaced closer together than the remaining guard members.

Claim 6

A guarded cutting edge according to claim 1 wherein the guard members are provided with a low-friction coating.

Claim 7

A guarded cutting edge according to claim 1 including means for securing the respective corner sections of the guarded members to the blade edge, the securing means comprising a tight pressed fit formed between the inner contour of the corner section of each guard member.

Claim 8

A guarded cutting edge according to claim 6 wherein the pressed fit is formed by a notch formed at the inner contour of the corner section of each guard member for cooperation with the blade edge.

Claim 9

A guarded cutting edge according to claim 1 including means for securing the respective corner sections of the guard members to the blade edge, the securing means comprising a multiplicity of spaced apart notches in the blade edge for cooperation with the inner contour of the corner sections of the respective guard members.

Claim 10

A guarded cutting edge according to claim 1 wherein the width of the guard members is between about 0.0015 to 0.0050 inch.

Claim 11

A guarded cutting edge according to claim 1 wherein the spacing between substantially all guard members is between about 0.02 to 0.06 inch.

Claim 12

A guarded cutting edge according to claim 1 wherein the cross-sectional profile of the guard members is approximately triangular in shape with rounded corner sections.

Claim 13

In a safety razor blade having a flat base structure, and an elongated cutting edge integral with a side of the razor blade base structure, a guarded cutting edge comprising a multiplicity of separate elongated metal thread-like guard members bent into substantially V-shaped form wherein each guard member defines a pair of relatively short ends converging at a rounded corner section, the guard members being fitted over the blade cutting edge and spaced substantially equidistantly apart along the blade cutting edge with their rounded corner sections protruding forward of the blade cutting edge, each guard member having a diameter in the range of between about 0.0015 to 0.0050 inch, the spacing between adjacent guard members being in the range of between about 0.02 and about 0.06 inch, and means for independently providing rigid and permanent attachment of the respective ends of each guard member to the razor blade base structure at points relatively close to the blade cutting edge to support the guard members in a substantially fixed position in which lateral movement of the guard members relative to the blade cutting edge during normal shaving operations is substantially prevented.

Claim 14

In a safety razor blade having a flat base structure, and an elongated cutting edge integral with a side of the razor blade base structure, a guarded cutting edge comprising a multiplicity of separate elongated metal thread-like guard members bent into substantially V-shaped form wherein each guard member defines a pair of relatively short ends converging at a rounded corner section, the guard members being fitted over the blade cutting edge and spaced substantially equidistantly apart along the blade cutting edge with their rounded corner sections protruding forward of the blade cutting edge, each guard member having a diameter in the range of between about 0.0015 to 0.0050 inch, the spacing between adjacent guard members being in the range of between about 0.02 and about 0.06 inch, and means for independently providing rigid and permanent attachment of the respective ends of each guard member to the razor blade base structure at points relatively close to the blade cutting edge to support the guard members in a substantially fixed position in which lateral movement of the guard members relative to the blade cutting edge during normal shaving operations is substantially prevented.

Claim 15

A guarded cutting edge according to claim 12 in which the effective length of each guard member is in the range of between about 0.03 and 0.06 inch.

Claim 16

A guarded cutting edge according to claim 12 wherein the edge of the razor blade base structure defines a pair of flanks converging outwardly to a point, and wherein the respective ends of each guard member are permanently secured to the respective flanks of the blade base structure.