Photocopying – Contact printing – Light boxes
Patent
1990-10-17
1991-10-08
Moses, R. L.
Photocopying
Contact printing
Light boxes
355309, 355 24, 271186, 271229, G03G 1500
Patent
active
050558854
ABSTRACT:
A paper path for guiding and transporting sheets of paper in an image former such as a printer or a photocopier which forms an image on both sides of the sheet of paper. The paper path has three channels: an image forming channel, a paper discharging channel, and a paper reversing channel. At the point where all three channels merge, a paper gate is provided for both guiding sheets of paper and signaling the presence of paper at the point where the three channels merge. The top surface of a paper tray containing unused sheets of paper is part of the paper reversing channel. When paper passes over the top surface of the paper tray, a roller momentarily stops the motion of the paper to prevent skew. A claw connected to the paper tray separates paper with an image formed on one side from paper in the tray. Guides provided over the claw prevent paper jams. A clutch is connected between one of the paper rollers and a driving source, and the clutch selectively disconnects the driving source to stop the motion of the paper to prevent skew. A second claw is provided on one of the paper rollers to ensure that only one sheet of paper enters the roller at a time. The second claw prevents paper jams which occur when two sheets of paper stick together by the force of static electricity.
REFERENCES:
patent: 4806979 (1989-02-01), Tokoro et al.
patent: 4918490 (1990-04-01), Stemmle
patent: 4979727 (1990-12-01), Koike et al.
Amamoto Hidekazu
Endo Kiyoyuki
Inasaki Yutaka
Kawada Masami
Saiki Atsuna
Fuji 'Xerox Co., Ltd.
Moses R. L.
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