Transfer apparatus having vacuum holes for holding a receiving s

Details Transfer apparatus having vacuum holes for holding a receiving s Transfer apparatus having vacuum holes for holding a receiving s

1989-07-03

1990-07-10

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355312, G03G 1516

Patent

active

049410202

ABSTRACT:
Apparatus for transferring a toner image to a receiving sheet includes a transfer member with vacuum holes. To enhance the continuity of the transfer electric field, a conductive screen is placed on top of the vacuum holes. According to a preferred embodiment, the screen is conductive across the path of the receiving sheet, but insulative parallel to such path.

REFERENCES:
patent: 3633543 (1972-01-01), Pitasi
patent: 3781105 (1973-12-01), Meagher
patent: 3827855 (1974-08-01), Blake
patent: 3832055 (1974-08-01), Hamaker
patent: 3900591 (1975-08-01), Kline
patent: 3936175 (1976-02-01), Jones
patent: 3993021 (1976-11-01), Kline
patent: 4080053 (1978-03-01), Friday
patent: 4403847 (1983-09-01), Chrestensen
patent: 4550999 (1985-11-01), Anderson
patent: 4712906 (1987-12-01), Bothner et al.
patent: 4724458 (1988-02-01), Roy et al.

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