Cutlery – Blades – Razor blade
Patent
1989-05-22
1991-03-12
Phan, Hien H.
Cutlery
Blades
Razor blade
30 43, 30 436, 30 4392, B26B 1914
Patent
active
049983520
ABSTRACT:
A cutting unit for a shaving apparatus, which cutting unit comprises a cutting head with hair entrance apertures and a drivable cutting member, the hair entrance apertures being separated by dams which extend substantially transversely to the direction of driving. The dams are constructed with a profile which is asymmetrical in cross-section and has a thickness which increases in the direction of driving.
REFERENCES:
patent: 2877548 (1959-03-01), Starre
patent: 3179543 (1965-04-01), Marcelis
patent: 3890705 (1975-06-01), Tietjens
patent: 4138811 (1979-02-01), Chauvy
patent: 4151645 (1979-05-01), Tietjens
patent: 4343089 (1982-08-01), Suzuki et al.
Bartlett Ernestine C.
Phan Hien H.
Rada Rinaldi
U.S. Philips Corp.
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