Multi-color electrophotograph apparatus

Details Multi-color electrophotograph apparatus Multi-color electrophotograph apparatus

Filed on

1989-09-15

Date issued

1991-04-16

Examiner

Griffin, Donald A.

Patent Class

Recorders

SubClass

Electric recording

SubSubClass

Electrochemical

Other Related Categories

G01D 1500

Type

Patent

Status

active

Patent number

050086910

Description

ABSTRACT:
In a multi-color LBP (laser beam printer) or a full-color LBP, two image producing elements each composed of charge-exposure-develop devices are arranged around one drum, and each of the image producing elements includes a developer capable of color changing for achieving a color change developing in every one revolution. In this way, it is made possible to practice a multicolor printing or a full-color printing in two rotations of one photosensitive drum. This printer has a higher printing speed and a smaller size of the apparatus in comparison with that of a one drum four rotation system and that of a one drum one rotation system, respectively. Further, the system includes several features common to two-color LBP printing art, making it possible to conveniently utilize the latter printing art.

REFERENCES:
patent: 4398817 (1983-08-01), Nishimura et al.
patent: 4837591 (1989-06-01), Snelling
patent: 4860048 (1989-08-01), Itoh et al.
patent: 4862216 (1989-08-01), Higashi et al.

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