Razor blade technology

Details Razor blade technology Razor blade technology

1990-10-16

1991-09-17

Watts, Douglas D.

Cutlery

Blades

Razor blade

761041, 76DIG8, B26B 2154

Patent

active

050481916

ABSTRACT:
A process for forming a razor blade includes the steps of providing a ceramic substrate, mechanically abrading an edge of the ceramic substrate to form a sharpened edge thereon with facets that have an included angle of less than thirty degrees; thermally processing the mechanically abraded edge to reduce surface raggedness and subsurface defects; and sputter-sharpening the sharpened edge to provide supplemental facets that have an included angle of more than forty degrees and define a tip radius of less than five hundred angstroms. The resulting blade exhibit excellent shaving properties.

REFERENCES:
patent: 2555214 (1951-05-01), Wallach
patent: 3514856 (1970-06-01), Camp
patent: 3543402 (1970-12-01), Seager
patent: 3607485 (1971-09-01), Bailey
patent: 3703766 (1972-11-01), Tibbals
patent: 3761373 (1973-09-01), Sastri
patent: 3834265 (1974-09-01), Tafapolsky
patent: 3911579 (1975-10-01), Lane
patent: 4534827 (1985-08-01), Henderson
patent: 4702004 (1987-10-01), Haythornthwaite

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