Electrophotographic charging device

Details Electrophotographic charging device Electrophotographic charging device

1993-04-20

1995-01-10

Grimley, A. T.

Photocopying

Contact printing

Light boxes

250325, 355221, 361221, G03G 1502

Patent

active

053812140

ABSTRACT:
A charging member for charging a photosensitive member from above toner in an electrophotographic process in which charging, exposure, development, and transfer steps are performed repeatedly and in which a step of cleaning toner remaining on a photosensitive member is eliminated, the charging member including: an electrically conductive charging wire which is disposed in contact with the photosensitive member; the charging wire forming an angle of less than 90.degree. with a direction of a rotational axis of the photosensitive member and is arranged at an interval in the direction of the rotational axis of the photosensitive member; and a power source for applying a pulse voltage to the charging wire, the pulse voltage having a polarity identical with that of the toner so as to vibrate the toner.

REFERENCES:
patent: 3146385 (1964-08-01), Carlson
patent: 3911335 (1975-10-01), Takahashi
patent: 4203144 (1980-05-01), Okamoto
patent: 4724509 (1988-02-01), Bergen et al.
patent: 5010441 (1991-04-01), Fox et al.
patent: 5028779 (1991-07-01), Gundlach et al.
patent: 5241342 (1993-08-01), Asano et al.
patent: 5243387 (1993-09-01), Ikegawa
patent: 5324942 (1994-06-01), Mishra et al.

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