Photocopying – Contact printing – Light boxes
Patent
1990-03-06
1992-01-07
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355233, 355313, G03G 1528
Patent
active
050795880
ABSTRACT:
An electrophotographic copying machine is provided with a leaf document circulation mode (LDC mode) in which an optical scanner is fixed under a light transmission part of a platen glass and an original is made to pass over the optical scanning mechanism with an automatic document feeder mounted on the platen glass. To prevent the light-fatigue of the photosensitive drum caused by the light passing through the platen glass and incident on a photosensitive drum through an optical system when the automatic document feeder mounted on the platen glass is opened in the LDC mode, the open/close condition of the automatic document feeder is detected with a sensor and when it is opened the optical scanner is moved to a position where the light incident through the platen glass does not strike upon the photosensitive drum.
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Maruta Syuzi
Ohira Tadashi
Barlow Jr. J. E.
Grimley A. T.
Minolta Camera Kabushiki Kaisha
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