Razor blade technology

Details Razor blade technology Razor blade technology

1990-03-19

1991-10-15

Watts, Douglas D.

Cutlery

Blades

Razor blade

261011, 26DIG8, B26B 2154

Patent

active

050562274

ABSTRACT:
A process for forming a razor blade includes the steps of providing a polycrystalline ceramic substrate of less than two micrometer grain size, mechanically abrading an edge of the polycrystalline ceramic substrate to form a sharpened edge thereon that has an included angle of less than twenty degrees; and sputter-etching the sharpened edge to reduce the tip radius to less than 300 Angstroms and form a cutting edge. The resulting blades exhibit excellent shaving properties.

REFERENCES:
patent: 2555214 (1951-05-01), Wallach
patent: 3501334 (1970-03-01), Flaherty
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: 3829969 (1974-08-01), Fischbeim et al.
patent: 3834265 (1974-09-01), Tafapolsky
patent: 3911579 (1975-10-01), Lane
patent: 3960608 (1976-06-01), Cole
patent: 4534827 (1985-08-01), Henderson
patent: 4702004 (1987-10-01), Haythornthwaite

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