Image forming apparatus having means for applying a common trans

Details Image forming apparatus having means for applying a common trans Image forming apparatus having means for applying a common trans

1994-01-25

1995-11-21

Brase, Sandra L.

Photocopying

Contact printing

Light boxes

355271, 355272, 355274, G03G 1501

Patent

active

054692482

ABSTRACT:
An image forming apparatus includes a first image forming unit for forming a first image on a first image carrier, a second image forming unit for forming a second image on a second image carrier, a conveyor belt confronting the first and second image carriers for conveying an image receiving medium to the first and second image carriers successively. The apparatus further includes a first transfer roller for transferring the first image from the first image carrier to the image receiving medium, the first transfer roller being located at a first distance from a first transfer position of the first image carrier along a conveying direction of the image receiving medium, and a second transfer roller for transferring the second image from the second image carrier to the image receiving medium, the second transfer roller being located at a second distance from a second transfer position of the second image carrier shorter than the first distance along the conveying direction of the image receiving medium. A common transfer bias voltage is applied to the first and second transfer rollers to form first and second electric fields at the first and second transfer positions, respectively.

REFERENCES:
patent: 5187536 (1993-02-01), Hagegawa et al.
patent: 5300984 (1994-04-01), Fuma et al.
patent: 5314774 (1994-05-01), Camis
patent: 5337136 (1994-08-01), Knapp et al.

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