Document platen movement control device for an electrophotograph

Details Document platen movement control device for an electrophotograph Document platen movement control device for an electrophotograph

1988-11-07

1990-11-06

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355 75, G03G 1528

Patent

active

049690140

ABSTRACT:
An electrophotographic copying machine in which the document platen is adapted to be moved to a maximum extent regardless of the size of a document, at the time of the last reproducing operation in a series of reproducing operations. Even though the slide rail mechanism for moving the document platent generates migration, the migration is eliminated by continuously moving the document platen to the maximum moving position after completion of the last exposure, thereby to produce no defective reproduction in the subsequent reproducing operations.

REFERENCES:
patent: 3672762 (1972-06-01), Suzuki et al.
patent: 4129374 (1978-12-01), Uchida et al.
patent: 4297023 (1981-10-01), Nagoshi
patent: 4452530 (1984-06-01), Koyama et al.
patent: 4666286 (1987-05-01), Kamitani et al.

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