Electrophotography – Internal machine environment – Particle or contaminant control
Patent
1996-12-30
2000-02-29
Moses, R. L.
Electrophotography
Internal machine environment
Particle or contaminant control
399176, 399 50, 399 55, G03G 2100
Patent
active
060320052
ABSTRACT:
Disclosed is a method for cleaning the contact charger of an electrophotographic apparatus including a photosensitive (photoconductive) drum, developing means, transfer means and main motor, which comprises the steps of applying a charging voltage of a specified level to the contact charger to make the surface of the photosensitive drum keep a surface potential of a given level during rotation of the main motor, cutting off the charging voltage applied to the contact charger and developing voltage applied to the developing means after a specified time so as to transfer the toner of opposite polarity attached to the contact charger to the photosensitive drum, and applying a negative transfer voltage to the transfer means so as to transfer the toner of opposite polarity transferred to the photosensitive drum to a sheet of paper.
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patent: 5253022 (1993-10-01), Takeuchi et al.
patent: 5532795 (1996-07-01), Tatsumi et al.
patent: 5557375 (1996-09-01), Nagayasu et al
patent: 5572293 (1996-11-01), Kituchi et al.
patent: 5608499 (1997-03-01), Tanaka
patent: 5629755 (1997-05-01), Ohtsuka
Chung Bum-Chae
Kyung Myung-Ho
Bushnell Esq. Robert E.
Moses R. L.
Samsung Electronics Co,. Ltd.
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