Method and apparatus for forming an electrostatic latent image w

Details Method and apparatus for forming an electrostatic latent image w Method and apparatus for forming an electrostatic latent image w

1996-10-01

1998-06-09

Grimley, Arthur T.

Electrophotography

Diagnostics

Document handling

399100, 399149, G03G 1500

Patent

active

057650764

ABSTRACT:
A method of forming an electrostatic latent image includes printing operation and toner recovering operation. the printing operation includes charging, forming an electrostatic latent image, developing, and transferring operations. The toner recovering operation includes the step of charging the photosensitive drum in timed relation to the rotation of the photosensitive drum after printing operation so that reversely charged toner deposited on the charging roller migrates from the charging roller to the photosensitive drum. The toner migrated from the charging roller to the photosensitive drum is recovered into a developer. An apparatus for forming an image includes a charging roller, photosensitive drum, developing roller, and transfer roller. The apparatus further includes a reversely-charged-toner recovering device which causes the photosensitive drum to be charged in timed relation to the rotation of the photosensitive drum after printing operation so that the reversely charged toner deposited on the charging roller migrates to the photosensitive drum. The developer recovers the toner which has migrated to the photosensitive drum from the charging roller.

REFERENCES:
patent: 4924268 (1990-05-01), Ogura
patent: 5321471 (1994-06-01), Ito et al.
patent: 5371578 (1994-12-01), Asano et al.
patent: 5404198 (1995-04-01), Noda et al.

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