Method of making a bent razor blade
AssigneeEdgewell Personal Care Brands, LLC
InventorsHenryk Bykowski, Stephan Fischer, Jochen Thoene
Life of this patent
Estimating the term…
Abstract
A method for making a bent razor blade is disclosed. The method includes: providing an elongated strip of stainless steel that can be 0.076 mm thick; hardening the strip; providing a cutting edge along an edge of the strip and providing coating(s) on the cutting edge. The stainless steel has a carbon content less than 0.60% and preferably between 0.45% and 0.55% by weight. The strip is separated lengthwise into discrete razor blades. The bent portion of the razor blade is then formed using a swivel bending process.
Claims8
A method of making a razor blade having a bent portion, comprising the steps of:
- a) providing an elongated strip of stainless steel having a front edge portion and a back edge portion, the stainless steel having a carbon content less than 0.60% by weight;
- b) hardening the strip to a first hardness;
- c) providing a cutting edge extending along the front edge portion of the elongated strip;
- d) cutting a lengthwise extending portion from the strip, the lengthwise extending portion providing the discrete razor blade having a length suitable for use in a razor cartridge housing, each discrete razor blade including a cutting edge, a back edge portion and a body portion therebetween;
- and
- e) forming a region of the body portion to provide the bent portion in the body portion;
- wherein the forming step includes applying an arcuate surface of a nose of an apparatus to provide the bent portion to a surface of the body portion with a predetermined contact pressure and pivoting the nose about a nose axis such that the arcuate surface rolls on, without sliding relative thereto, the surface of the body portion;
- and
- wherein the razor blade thus formed includes a first generally planar portion between the cutting edge and the bent portion and a second generally planar portion between the bent portion and the back edge portion.
Dependencies are inferred from the claim text.