Non-abrasive composite doctor blade

Details Non-abrasive composite doctor blade Non-abrasive composite doctor blade

2005-03-15

2005-03-15

Ruddock, Ula (Department: 1771)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Woven fabric

Woven fabric including an additional woven fabric layer

C442S246000, C442S251000, C442S253000, C428S293400, C428S297400, C162S280000, C162S281000

Reexamination Certificate

active

06867155

ABSTRACT:
A multiplayer composite doctor blade has a side edge configured for application to the surface of a rotating roll in a paper making machine. The doctor blade has an inner core and intermediate layers preferably enclosed by outer layers. The inner core is predominantly polymeric material. The intermediate layers on opposite sides of the core include reinforcing fibers. The side edge of the doctor blade has an abrasiveness as measured by ASTM test method D5181-91 of between about 4.0 to 5.0.

REFERENCES:
patent: 2767529 (1956-10-01), Scott
patent: 3847707 (1974-11-01), Meyer et al.
patent: 4549933 (1985-10-01), Judd et al.
patent: 4735144 (1988-04-01), Jenkins
patent: 5117264 (1992-05-01), Frankel et al.
patent: 1694755 (1991-11-01), None
Database WPI, Section Ch, Week 199404, Derwent Publications Ltd., London, GB; AN 1994-031397, XP002220132 & JP 05338048 A (Teijin Ltd), Dec. 21, 1993, abstract.
Database WPI, Section Ch, Week 198002, Derwent Publications Ltd., London, GB; AN 1980-02479C, XP002220133 & JP 54-149787 A (Ichikawa Keori KK), Nov. 24, 1979, abstract.

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