Switched standby housing bias in read printers

Details Switched standby housing bias in read printers Switched standby housing bias in read printers

1998-11-02

1999-12-21

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of developing

399 98, 399266, G03G 1506

Patent

active

060060492

ABSTRACT:
Operation of a developer so as to achieve reduced scavenging and reduced direct contamination when using a hybrid developer. A hybrid developer is operated in three modes. The first mode is normal operation in which the developer operates as in the prior art. The second mode is an unloaded standby mode wherein toner is not on the developer's donor roll and wherein the developer's bias potentials are selected to reduce scavenging. The third mode is a loaded standby mode wherein toner is on the developer's donor roll and wherein the developer's bias potentials are selected to reduce direct contamination.

REFERENCES:
patent: 4868600 (1989-09-01), Hays et al.
patent: 4984019 (1991-01-01), Folkins
patent: 5010367 (1991-04-01), Hays
patent: 5063875 (1991-11-01), Folkins et al.

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