Transfer device with insulated shield

Photocopying – Contact printing – Light boxes

Patent

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Details

G03G 1516

Patent

active

051721740

ABSTRACT:
A transfer belt unit for conveying a recording sheet on a conveyor thereof and transferring a toner image from the surface of an image carrying drum to the recording sheet by electrostatic charging of the recording sheet and the conveyor belt by a corona discharger located on the rear side of the conveyor belt at a contact location of the image carrying drum and the conveyor belt. The transfer belt unit is provided with a preliminary corona discharger located in the wedge shaped space between the surfaces of the conveyor belt and the image carrying drum for charging the conveyor belt and the recording sheet by corona discharging to attract the recording sheet to the surface of the conveyor belt by electrostatic force. The preliminary discharger is composed of an electrode for corona discharging and a shield plate with an opening for restricting a discharging zone from the electrode to the recording sheet.

REFERENCES:
patent: 3357325 (1967-12-01), Eichorn et al.
patent: 3697170 (1972-10-01), Bhagat et al.
patent: 3966199 (1976-06-01), Silverberg
patent: 4050802 (1977-09-01), Tanaka et al.
patent: 4258258 (1981-03-01), Laing et al.
patent: 4407580 (1983-10-01), Hashimoto et al.

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