Duplex color printing system with curl control by sheet rotation

Details Duplex color printing system with curl control by sheet rotation Duplex color printing system with curl control by sheet rotation

1996-09-27

1998-03-03

Moses, R. L.

Electrophotography

Document handling

Original and copy

399406, 399397, 399298, 271184, G03G 2100

Patent

active

057246424

ABSTRACT:
A system of improved duplex color printing by reducing copy sheet feeding jams due to first side color printing sheet curl by feeding and printing a first plural color image on a first side of a copy sheet with the copy sheet in a first orientation, then automatically rotating the copy sheet by 90 degrees from the first orientation into a second orientation and feeding and printing a second plural color image on the second side of the copy sheet with the copy sheet in the second orientation. Additionally disclosed is, in coordination therewith, automatically rotating the image for the second side of the copy sheet by 90 degrees from the first plural color image for the printing of the second plural color image on the second side of the copy sheet with the copy sheet in the second orientation, so that commonly oriented images are provided on the first and second sides of the copy sheet. The first printing pass orientation of the copy sheet may be long edge first, and the second short edge first.

REFERENCES:
patent: 4877234 (1989-10-01), Mandel
patent: 4955965 (1990-09-01), Mandel
patent: 5090683 (1992-02-01), Kamath et al.
patent: 5224696 (1993-07-01), Kellum
patent: 5445592 (1995-08-01), Richards
patent: 5461469 (1995-10-01), Farrell
Xerox Disclosure Journal, vol. 9, No. 5, Sep./Oct., 1984, p. 323 "Copy Rotator/Inverter", Author: R.E. Shaeffer.

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