Photocopying – Contact printing – Light boxes
Patent
1988-09-30
1990-05-22
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355204, 355208, 355326, 355327, G03G 2100, G03G 1500
Patent
active
049281364
ABSTRACT:
An image forming apparatus which comprises a photoreceptor medium supported for rotation in one direction, a charging device for forming an electrostatic latent image on the photoreceptor medium, a plurality of developing devices disposed in fact-to-face relationship with the photoreceptor medium for developing the electrostatic latent image into a visible powder image, a transfer charger for transferring the powder image onto a copying sheet, a sheet transport system for supplying the copying sheet to a transfer station where the transfer charger is dispose, a detector for detecting the color of toner material contained in each of the developing devices, and a control circuitry for causing one of the developing devices to apply the toner material of a particular color to a portion of the photoreceptor medium, which corresponds in position to a leading edge of the copying sheet, in the event that such one of the developing devices is detected as containing the toner material of that particular color.
REFERENCES:
patent: 4314755 (1982-02-01), Kinashi
patent: 4353648 (1982-10-01), Tanaka et al.
patent: 4668978 (1987-05-01), Gokita
patent: 4772916 (1988-09-01), Mochida
Kinoshita Naoyoshi
Kusumoto Keiji
Grimley A. T.
Hoffman Sandra L.
Minolta Camera Kabushiki Kaisha
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