Transfer-fusing speed compensation

Details Transfer-fusing speed compensation Transfer-fusing speed compensation

1976-07-20

1977-04-12

Blunk, Evon C.

Sheet feeding or delivering

Delivering

Rotary conveyor

118 60, 226118, 271194, 271270, 271DIG2, 355 3R, 432 60, B65H 2924, B65H 2954

Patent

active

040170675

ABSTRACT:
In an electrostatographic copier wherein the fuser rolls are positioned closer than the dimensions of the copy sheet from the image transfer area, speed mismatch compensation between the fuser roll nip and the initial image support surface is provided by intentionally driving the fuser roll nip at a different pre-set velocity to form a buckle in the intermediate portion of the copy sheet controlled by selective cyclic reductions in the vacuum applied to a vacuum chamber sheet guide surface between the fuser nip and the initial image support surface, wherein the vacuum guide is in two areas, one of which is provided with a vacuum by the other, but is cyclically atmospherically vented.

REFERENCES:
patent: 3499614 (1970-03-01), Badum
patent: 3578859 (1971-05-01), Stillings
patent: 3743154 (1973-07-01), Brewite
patent: 3774907 (1973-11-01), Borostyan
patent: 3863913 (1975-02-01), Hirafuji

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