Image forming apparatus having a plurality of vertically stacked

Details Image forming apparatus having a plurality of vertically stacked Image forming apparatus having a plurality of vertically stacked

1996-09-24

1998-07-28

Ramirez, Nestor R.

Electrophotography

Having particular structure

Modular or displaceable

347245, 399124, 399223, G03G 2100

Patent

active

057873240

ABSTRACT:
Maintenance performance is promoted and a vivid printed image is provided in an electrophotographic device capable of conducting color printing. Cartridges corresponding to different printing colors, each of which includes a photosensitive body, are stacked in a vertical direction. A recording sheet is fed along a sheet feeding path and brought into contact with the photosensitive bodies corresponding to the respective colors, and toner images of the respective printing colors are transferred on the recording sheet. A transfer belt for feeding the recording sheet is arranged in a front cover, and the transfer belt is exposed when the front cover is opened. Therefore, correcting a mis-feeding of the recording sheet is facilitated. Also, the respective cartridges are spaced apart such that optical paths are provided between the cartridges so that optical beams corresponding to the respective printing colors may be directly irradiated onto the corresponding photosensitive bodies. In addition, the cartridges and optical scanners are mounted on the device using materials having substantially the same coefficient of thermal expansion so that changes in the ambient temperature will not affect the relative positions of the scanners and the photosensitive bodies.

REFERENCES:
patent: 5047801 (1991-09-01), Haneda et al.
patent: 5253028 (1993-10-01), Gonda et al.
patent: 5282012 (1994-01-01), Terada et al.
patent: 5517296 (1996-05-01), Choi et al.

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