Photocopying – Contact printing – Light boxes
Patent
1991-03-18
1992-07-07
Braun, Fred L.
Photocopying
Contact printing
Light boxes
271259, 271265, G03B 2100, B65H 702
Patent
active
051287277
ABSTRACT:
There is provided an image forming apparatus such as a copying apparatus having a sensor to detect the front edge of an original and a sensor to detect the front edge of a paper onto which a copy image of the original is formed, in which the copying operation is started in accordance with the result of the detections by both sensors. A distance which is obtained by adding a distance from an exposing position of a photosensitive drum and a distance from an original feed roller to an exposing position is equalized to a distance from the copy transfer position of the photosensitive drum to a paper feed roller. If such distances differ, the feeding timing of the original or paper is delayed in accordance with the difference between those distances. Thus, the cheap and small copying apparatus can be realized without using an expensive control system such as a registration roller.
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Miyauchi Yasuo
Nomura Akihiro
Braun Fred L.
Canon Kabushiki Kaisha
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