Method for driving development unit for image forming apparatus

Details Method for driving development unit for image forming apparatus Method for driving development unit for image forming apparatus

1998-05-08

1999-05-25

Lee, S.

Electrophotography

Image formation

Development

399237, 399249, G03G 1501, G03G 1510

Patent

active

059077549

ABSTRACT:
A method for driving development devices of an image forming apparatus including the steps of: (a) simultaneously rotating gear cams of the respective development devices for colors Y (yellow), M (magenta), C (cyan) and K (black); (b) determining whether the frame of the development devices is lifted to a preset position; (c) rotating a developing roller; (d) coating a developer liquid on an image portion of a photoreceptor belt; (e) determining whether the image portion has passed through a transfer roller or not; (f) simultaneously rotating the gear cams of the respective development devices for colors Y, M, C and K if the image portion has passed through the transfer roller; (g) determining whether the distance between the frame and the photoreceptor belt is a preset value; (h) simultaneously stopping the gear cams of the respective development devices for colors Y, M, C and K if the distance between the frame and the photoreceptor belt is the preset value; and (i) simultaneously removing drip lines by simultaneously reversely rotating first and second squeegee rollers in the respective development devices. Therefore, the overall configuration becomes simplified, thereby reducing the fabrication cost, as well as making maintenance and repair thereof easy.

REFERENCES:
patent: 4754301 (1988-06-01), Kasamura et al.
patent: 4801966 (1989-01-01), Ikeda
patent: 5828934 (1998-10-01), Tamura et al.

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