Image transfer device

Photocopying – Including fiber optics

Patent

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Details

355 4, G03G 1516

Patent

active

046748601

ABSTRACT:
An image transfer device which transfers a charged toner carried on an image carrier onto a copying material comprises a transfer drum having a conductive base and an insulating surface, the transfer drum being arranged opposite to the image carrier. An electrical charge is applied to the copying material in advance of the copying material arriving at the insulating surface of the transfer drum. An electrical charge is also provided on the surface of the transfer drum in advance of the copying material arriving at the insulating surface of the transfer drum for attracting the copying material to the surface of the transfer drum and to maintain the attraction by the charges during a copying operation. In place of providing a specified charge on the surface of the transfer drum, a bias voltage can be applied to the conductive base of the transfer drum to provide the attraction force for improving attraction of the copying material to the surface of the transfer drum and to maintain the attraction during a copying operation.

REFERENCES:
patent: 3729311 (1973-04-01), Langdon
patent: 3837741 (1974-09-01), Spencer
patent: 3847478 (1974-11-01), Young
patent: 3879121 (1975-04-01), Simpson
patent: 3924943 (1975-12-01), Fletcher
patent: 3936175 (1976-02-01), Jones
patent: 4063808 (1977-12-01), Simpson

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