Seal relief doctor blade

Details Seal relief doctor blade Seal relief doctor blade

1990-02-12

1991-07-02

Watts, Douglas D.

Cutlery

Cutting tools

Scrapers

1525651, 101157, 101169, B26B 300, A46B 1500, B41F 336, B41F 338

Patent

active

050275135

ABSTRACT:
A relatively thick-bodied doctor blade made of a low friction plastic material includes a seal relief bevel of between approximately 5 and 10 degrees. The blade then tapers to a tip support shape and tip of between approximately 0.001 and 0.005 inch. When used in conjunction with a chamber type inking system, the doctor blade cooperates with the chamber end seals to form a more positive and controlled seal therebetween.

REFERENCES:
patent: 4184429 (1980-01-01), Widmer
patent: 4425848 (1984-01-01), Bell
patent: 4461211 (1984-07-01), Wesselmann
patent: 4508032 (1985-04-01), Phillipp
patent: 4590855 (1986-05-01), Schommer et al.
patent: 4735144 (1988-04-01), Jenkins
patent: 4821672 (1989-04-01), Bruno
patent: 4895071 (1990-01-01), Benton

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