Image forming apparatus usable with variable width receivers

Details Image forming apparatus usable with variable width receivers Image forming apparatus usable with variable width receivers

1995-01-31

1996-12-17

Royer, William J.

Photocopying

Contact printing

Light boxes

355311, G03G 1516

Patent

active

055859089

ABSTRACT:
A toner image is transferred from an image member to a receiving sheet using a backing member or corona charger to which a constant current source is applied for creation of a transfer electrical field. A logic and control receives an input indicative of the width of the receiving sheet and adjusts the current applied by the constant current source accordingly. Preferably, the logic and control also has an input indicative of the resistance of the receiving sheet, for example, determined by determining relative humidity and/or the thickness of the receiving sheet, which also is used with the width input to adjust the current applied by the constant current source.

REFERENCES:
patent: 3837741 (1974-09-01), Spencer
patent: 3924943 (1975-12-01), Fletcher
patent: 4610530 (1986-09-01), Lehmbeck et al.
patent: 5036360 (1991-07-01), Paxon et al.
patent: 5084737 (1992-01-01), Hagen et al.
patent: 5099287 (1992-03-01), Sato
patent: 5455664 (1995-10-01), Ito et al.

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