Image forming apparatus with image reading unit

Details Image forming apparatus with image reading unit Image forming apparatus with image reading unit

1992-12-15

1994-02-15

Grimley, A. T.

Photocopying

Contact printing

Light boxes

271258, 271265, 355204, 355208, 355209, G03G 2100, G03G 1500

Patent

active

052871584

ABSTRACT:
An image forming apparatus includes a printing unit for printing an image on a paper, a paper feed mechanism for feeding a paper to said printing unit, a paper supply cassette for forwarding papers, one by one, to said paper feed mechanism, an optical sensor for detecting whether or not a surface of each paper, fed to said printing unit by said paper feed mechanism, is blank, and an ejecting unit for ejecting a paper from said paper feed mechanism without printing an image thereon when said optical sensor detects that the surface of the paper is not blank, so that only papers having blank surfaces are fed to said printing unit.

REFERENCES:
patent: 4924275 (1990-05-01), Nelson
patent: 5005049 (1991-04-01), Matsushita
patent: 5038182 (1991-08-01), Tanimoto

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