Sheet feeding mechanism for printing apparatus

Details Sheet feeding mechanism for printing apparatus Sheet feeding mechanism for printing apparatus

1991-08-12

1992-08-25

Burr, Edgar S.

Typewriting machines

Sheet or web

Including skew correction responsive to position of sheet or...

4006363, 400625, 271314, B41J 1136

Patent

active

051413442

ABSTRACT:
A sheet feeding mechanism for a printing apparatus capable of achieving accurate sheet feed performance free from slanted sheet feeding, dislocation between pages in printing on copy sheets, out-of-pitch printing, and the like. The sheet feeding mechanism includes a pair of confronting roller units capable not only of applying a driving-like sheet feed force to both front and back surfaces of a copy sheet, but also of maintaining a constant pressure contact force from each roller. The shafts of the pair of confronting roller units are driven so that the sheet feed force is stable. The pressure contact force is produced by a structure wherein each roller is biased by independent loading.

REFERENCES:
patent: 3411686 (1968-11-01), Bender
patent: 4500219 (1985-02-01), Lange et al.
patent: 4767114 (1988-08-01), Nishimoto
patent: 4870258 (1989-09-01), Mochizuki et al.
patent: 4997179 (1991-03-01), Mizutani et al.
patent: 5028156 (1991-07-01), Takano

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