Printing system having a hot roll fuser with a scraping blade cl

Details Printing system having a hot roll fuser with a scraping blade cl Printing system having a hot roll fuser with a scraping blade cl

1975-05-19

1976-10-19

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Attachments

Moving surface scraper, wiper, or brush

34120, 101425, 355 15, G03G 1500

Patent

active

039862275

ABSTRACT:
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 contamination 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.

REFERENCES:
patent: 3252416 (1966-05-01), Allen
patent: 3520410 (1970-07-01), Hutto, Jr.
patent: 3577649 (1971-05-01), Wadsworth et al.
patent: 3794417 (1974-02-01), Machmer

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