Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1980-04-21
1983-10-25
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3CH, 355 8, 355 14E, G03G 1502
Patent
active
044115148
ABSTRACT:
An electrophotographic apparatus capable of copying an original selectively at different magnifications includes a movable electrophotographic photosensitive member, an electrostatic discharge device for imparting discharge to the photosensitive member to render it into a potential condition capable of forming an electrostatic latent image, a scanning mechanism for scanning the original, an optical system for forming an optical image of the scanned original on the photosensitive member at a selected magnification to form an electrostatic latent image, a device for changing the velocity of movement of the photosensitive member in correspondence with the selected magnification, and control circuit for varying the quantity of discharge per unit time of the discharge member to the photosensitive member in correspondence with the selected magnification.
REFERENCES:
patent: 3496351 (1970-02-01), Cunningham
patent: 3564239 (1971-02-01), Kushima
patent: 3678350 (1972-07-01), Matsumoto et al.
patent: 4139298 (1979-02-01), Tani
patent: 4208697 (1980-06-01), Fischer et al.
patent: 4209248 (1980-06-01), Gibson et al.
Komori Shigehiro
Ogawa Hiroshi
Braun Fred L.
Canon Kabushiki Kaisha
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