Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1983-02-02
1986-09-23
Prescott, A. C.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3SH, 355 3R, 355 14R, G03G 1500
Patent
active
046132279
ABSTRACT:
The invention provides an image forming apparatus which performs continuous copying operation without degrading the quality of copies. The apparatus includes a photosensitive drum for forming an image thereon, pressure fixing rollers for fixing the transferred image on the transfer paper sheet, a detection switch for detecting the trailing edge of the transfer paper sheet, and timers T0 to T5 assigned in a RAM of a microcomputer .mu.COM of a control section. The timers function such that the conveyance of the transfer paper sheet for the next copying operation is prohibited until the current transfer paper sheet is completely fed out, thereby preventing an adverse effect of an impact by the pressure/fixing rollers.
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patent: 4366219 (1982-12-01), Beery
patent: 4382674 (1983-05-01), Miyoshi et al.
patent: 4395111 (1983-07-01), Takahashi et al.
patent: 4455080 (1984-06-01), Sugiura et al.
patent: 4455081 (1984-06-01), Yoshimura et al.
patent: 4468113 (1984-08-01), Motohashi et al.
Canon Kabushiki Kaisha
Prescott A. C.
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