Razor Blade and Method of Manufacture
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United States of America Patent
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N/A
Issued Date -
May 31, 2012
app pub date -
Jan 20, 2012
filing date -
May 5, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for making a razor blade having a bent portion 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 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. When the razor blade is bent to define an included angle of 90 degrees between planar regions adjacent the bent portion and an inner surface having a radius about 0.3-0.35 mm, the outer surface of the bent portion is free from macro-cracks.
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