Printing system having a hot roll fuser with a scraping...

Details Printing system having a hot roll fuser with a scraping... Printing system having a hot roll fuser with a scraping...

G - Physics

03

G

314/38

G03G 21/00 (2006.01) B41F 35/00 (2006.01) G03G 15/20 (2006.01)

Patent

CA 1056444

PRINTING SYSTEM HAVING A HOT ROLL FUSER WITH A scraping BLADE CLEANER Abstract of the Disclosure In a xerographic printing system the toned copy paper is fused by the pressure nip formed by a hot roll and a backup roll. A scraping blade engages the destructible surface of the backup roll at a critical angle which is selected as a function of the coefficients of friction of the backup roll's surface and the toner/debris contamina- tion that may be collected on the backup roll's surface. As a result, the blade slides freely on the roll's surface, but does not slide on the surface of the toner/debris contamination film. This film forms a locking angle with the blade, placing the blade in stress, and developing a film removing chisel-like action therewith.

252769

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