Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-12-15

2000-09-26

Mathews, Alan A.

Electrophotography

Document handling

Copy

355 47, 358300, G03G 1500, G03B 2758, H04N 123

Patent

active

061252581

ABSTRACT:
An image forming apparatus is provided with a developer for developing a latent image on a photoreceptor drum into a visible image and a transfer drum having a position detector, for holding a supplied transfer material at a predetermined position and conveying the transfer material, and a transfer voltage source for supplying a transfer voltage to a conductive base of the transfer drum and output values of the transfer voltage source vary in stages when toners of a plurality of colors are transferred. In the image forming apparatus, when printing is continuously performed on a plurality of transfer materials, the timing where output values of the transfer voltage source are returned to the initial value is synchronized with the timing where the rear end of a transfer material having a maximum length capable of being printed is separated from the photoreceptor drum. As a result, the transfer material attracted by the transfer drum can be surely prevented from being jammed.

REFERENCES:
patent: 5132788 (1992-07-01), Hirota
patent: 5440382 (1995-08-01), Suga

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