Copier operable in a two-sided copy mode

Details Copier operable in a two-sided copy mode Copier operable in a two-sided copy mode

1991-01-11

1991-08-06

Moses, R. L.

Photocopying

Contact printing

Light boxes

355204, 355308, 355318, G03G 2100

Patent

active

050381822

ABSTRACT:
A copier having an automatic document feeder (ADF) and selectively operable in a one-side copy mode for reproducing a document image on only one side of a paper sheet and a two-sided copy mode for reproducing document images on both sides of a paper sheet. A reversing device reverses a paper sheet undergone a copying procedure. When a tray included in the ADF is loaded with a combined stack of one-sided and two-sided documents, the condition of the back of each document is sensed by a sensor while the document is transported toward an illuminating position. The copier is automatically conditioned for the two-sided copy mode if an image is present on the back of the document or for the one-sided copy mode if otherwise. The paper sheets with images are reversed only in one of the two different copy modes before driven out of the copier.

REFERENCES:
patent: 4330197 (1982-05-01), Smith et al.
patent: 4881729 (1989-11-01), Culligan et al.
patent: 4928151 (1990-05-01), Saeki
patent: 4935780 (1990-06-01), Yamada et al.
patent: 4974035 (1990-11-01), Rabb et al.

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