Paper feeding in printers

Details Paper feeding in printers Paper feeding in printers

1987-03-04

1989-05-30

Levy, Stuart S.

Advancing material of indeterminate length

Convertible

226187, 226193, 226 74, 400605, 400616, B65H 1710, B41J 1300

Patent

active

048342777

ABSTRACT:
The paper feeder incudes an upstream friction roller pair for single sheet feeding, a pushing tractor for endless sheet feeding, and a common downstream (behind the platen) friction roller pair. Each pair has one roller mounted on a pivot lever and the two levers linkedly held in a spring biased linkage such that consistently the downstream roller pair exert a smaller friction force while rotating at a higher speed.

REFERENCES:
patent: 3330458 (1967-07-01), Bentzman
patent: 3561660 (1971-02-01), Nicol
patent: 3753483 (1973-08-01), Londquist et al.
patent: 4272001 (1981-06-01), Horniak
patent: 4564305 (1986-01-01), Rekewitz et al.
patent: 4606663 (1986-08-01), Christoph et al.

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