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US 10,413,962 B2Granted
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.
Claims5
A method of making a razor blade, comprising:
- providing a stainless steel strip having a carbon content in a range 0.45% to 0.55%;
- forming a cutting edge along a front edge of the strip and cutting the strip into a lengthwise extending portion;
- providing a forming tool having:
- a first jaw;
- a second jaw that includes a parti-cylindrical surface, wherein the parti-cylindrical surface of the second jaw of the forming tool has an axis;
- and
- a nose having an arcuate contact surface;
- clamping the lengthwise extending portion of the strip relative to the tool at a position such that the cutting edge is between the first jaw and the second jaw and a back edge portion of the strip extends outwardly from and beyond the parti-cylindrical surface of the second jaw of the forming tool;
- disposing the arcuate contact surface of the nose of the forming tool in contact with a first surface of the lengthwise extending portion of the strip adjacent the first jaw at a position adjacent the parti-cylindrical surface;
- and
- moving the nose of the forming tool along the parti-cylindrical surface of the second jaw of the forming tool with the surface of the lengthwise extending portion of the strip adjacent the first jaw in contact with the arcuate contact surface of the nose of the forming tool and the lengthwise extending portion has a second surface opposed to the first surface adjacent the first jaw in contact with the parti-cylindrical surface of the second jaw of the forming tool;
- wherein the step of moving the nose of the forming tool along the parti-cylindrical surface of the second jaw of the forming tool includes moving the nose around the axis of the parti-cylindrical surface of the second jaw;
- and
- wherein the nose of the forming tool is pivotally mounted about a nose axis, and additionally rotates about the nose axis relative to the lengthwise extending portion of the strip during the moving step.
11 more elements
Dependencies are inferred from the claim text.