Electrophotographic image forming apparatus having a pre-transfe

Details Electrophotographic image forming apparatus having a pre-transfe Electrophotographic image forming apparatus having a pre-transfe

1994-02-15

1996-09-03

Ramirez, Nestor R.

Photocopying

Contact printing

Light boxes

355271, G03G 1514

Patent

active

055528732

ABSTRACT:
An electrophotographic image forming apparatus suitable especially for double-side printing or double-side copying. A pressure roller for pressing a sheet of paper against an electrostatic latent image retaining body is rotatably provided on the upstream side of a transfer unit. The pressure roller is elastically mounted through a cushion member, thereby preventing transmission of vibration of the pressure roller itself to the paper. As the paper is positively pressed against the retaining body by the pressure roller, the paper can be brought into close contact with the retaining body even when the paper is wrinkled, thus obtaining a good transfer characteristic.

REFERENCES:
patent: 4882606 (1989-11-01), Deguchi
patent: 4947214 (1990-08-01), Baxendell et al.
patent: 5031002 (1991-07-01), Yaguchi
patent: 5138396 (1992-08-01), Satou et al.

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