Color image forming apparatus with plural color units

Details Color image forming apparatus with plural color units Color image forming apparatus with plural color units

1997-02-24

1998-09-15

Brase, Sandra L.

Geometrical instruments

399167, 399223, G03G 1501

Patent

active

058093800

ABSTRACT:
A color image forming apparatus having a simple mechanism for switching plural photosensitive drum units and still maintaining a high resolution image is provided. In the apparatus, each image forming unit including each color photosensitive drum is disposed around a rotating shaft of a carriage. Each photosensitive drum has a coupling plate at one end, which is engaged by a drive side coupling plate for transmitting a drive force to the photosensitive drum, when the image forming units is moved to the image forming position. An output shaft that rotates the drive side coupling plate supports an edge of a photosensitive drum shaft in alignment. A toner image formed on the photosensitive drum is transferred onto a transfer belt, which rotates at a constant speed, one by one to form a multicolor image on the transfer belt. The multicolor image on the transfer belt is transferred onto a paper sheet. A transmission between a motor and the carriage include a worm gear.

REFERENCES:
patent: 4743938 (1988-05-01), Ohno
patent: 5325151 (1994-06-01), Kimura et al.
patent: 5565975 (1996-10-01), Kumon et al.
patent: 5585911 (1996-12-01), Hattori et al.
patent: 5587783 (1996-12-01), Nakamura et al.
patent: 5610701 (1997-03-01), Terada et al.

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