Photocopying – Contact printing – Light boxes
Patent
1988-10-24
1992-05-12
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355326, G03G 2100, G03G 1501
Patent
active
051132214
ABSTRACT:
An image forming apparatus is provided with a plurality of toner developing devices including a white toner developing one, a photosensitive member, a charger for electrically charging a surface of the photosensitive member, an optical system for exposing an image of an original to light so that an electrostatic latent image may be formed on the photosensitive member, transfer and separation chargers for transferring a toner image formed on the photosensitive member onto a copy paper, a plurality of paper passages for transporting the copy paper having thereon the transferred toner image into a transfer region in which the transfer and separation chargers are provided, a color sensor for detecting the degree of white of the copy paper, and a microcomputer for controlling a white toner image formed by the white toner developing device so as to be transferred onto the copy paper when the degree of white of the copy paper is less than a predetermined value.
REFERENCES:
patent: 4579443 (1986-04-01), Abuyama et al.
patent: 4845524 (1989-07-01), Okamoto et al.
patent: 4847658 (1989-07-01), Takebe et al.
patent: 4928136 (1990-05-01), Kusumoto et al.
Araki Kazuhiro
Kawaguchi Toshikazu
Kotani Akio
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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