US 4,146,958 AGranted

Safety razor

AssigneeWarner-Lambert Company

InventorsEvan N. Chen, Edward A. Beddall, Bryan J. Goddard

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Abstract

A safety razor contains a blade cartridge in which two blades are rigidly secured. The cartridge has a seat member with an integral blade edge guard disposed transversely along its forward margin. A first razor blade is disposed on a planar surface of the seat member and has its cutting edge located rearwardly of the guard. A second razor blade having a cutting edge located parallel to and rearwardly of the first blade edge is in contact with a mating surface of a cap member. The cap member is secured to the seat member thereby clamping the blades in desired position. The blades are maintained at a predetermined distance apart by spacing means and the guard member has a plurality of projecting teeth transversely arrayed across the guard member forming a comb guard.

Claims14

Dependent claims

A razor blade cartridge comprising:

a seat member having an integral blade edge guard disposed transversely of and parallel to a forward margin of the seat member, the guard having a plurality of forwardly projecting teeth forming a comb guard;
a first razor blade disposed on a substantially planar surface of the seat member having a cutting edge parallel to the forward margin and located rearwardly of the guard;
a second razor blade having a cutting edge located parallel to and rearwardly of the first blade edge;
a cap member having a bearing surface in contact with the second blade and affixed to the seat member for clamping the first and second blades in desired position;
means for maintaining the blade cutting edges a predetermined normal distance apart;
the comb guard comprising a plurality of arcuately shaped teeth projecting substantially normally to planes bisecting the cutting edges of the first and second razor blades, the teeth being joined by a transversely extending member parallel to the forward margin forming substantially planar webs between respective teeth, the webs located in a plane having a selected angle with respect to the bisecting planes of the blade cutting edges, the teeth projecting at least approximately 0.020 inch above the webs and having a pitch between approximately 0.050 and 0.125 inch and a width between approximately 0.020 and 0.062 inch, the maximum width of the teeth selected to be less than approximately one-half the pitch;
and
wherein the first and second blade cutting edges have tangent angles between approximately 23 degrees and 27 degrees, the first blade cutting edge has a negative exposure between approximately 0.001 and 0.005 inch and a span between approximately 0.040 and 0.065 inch, and the second blade cutting edge has a negative exposure between approximately 0.004 and 0.008 inch and a span between approximately 0.040 and 0.065 inch.

5 more elements

Dependencies are inferred from the claim text.