Electrophotography – Image formation
Patent
1996-06-28
1998-07-28
Smith, Matthew S.
Electrophotography
Image formation
347141, 347147, 347148, 347149, G03G 1522, B41J 239
Patent
active
057873275
ABSTRACT:
This invention relates to the charging member portion of an image forming apparatus. A plurality of charging members are disclosed that maintain a uniform spacing between a charge-receiving member and the discharging portion of the charging members' electrodes despite surface irregularities and surface waviness on the charge-receiving member. One charging member is in the form of a flexible sheet provided with ventilation holes in a non-contacting portion thereof, permitting the air produced by the rotation of the charge-receiving member to escape through the holes to suppress the lifting of the charging member. Pressure fins can be added to the charging member on the downstream of the ventilation holes for further suppressing any lifting. Another charging member includes a semiconductive member or a electret member on at least the surface of the charging member on the side opposite the charge-receiving member. This permits the charging member to be electrostatically attracted to the charge-receiving member.
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Matsushita Kouji
Nakagami Yasuhiro
Minolta Co. , Ltd.
Smith Matthew S.
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