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Browse Prior Art Database

TONER WIRE CONTAMINATION COUNTER MEASURES

IP.com Disclosure Number: IPCOM000027409D
Original Publication Date: 1996-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 80K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is a process setup configuration for counteracting the ill effects of streaks and decreased print development caused by toner accumulation on the electrode wires in a Hybrid Scavengeless Development system. The counteractive parameters, their affects, and setup values thereof include:

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XEROX DISCLOSURE JOURNAL

TONER WIRE CONTAMINATION COUNTER MEASURES U. S. C1.355/261 Grace T. Brewington
Richard P. Germain
Timothy J. Stephany

Proposed Classification

Int. C1. G03g 15/06

Proposed is a process setup configuration for counteracting the ill effects of streaks and decreased print development caused by toner accumulation on the electrode wires in a Hybrid Scavengeless Development system. The counteractive parameters, their affects, and setup values thereof include:

1) A 0 to -150 volt DC Nip Wire Bias: when adjusted relative to the donor roll bias reduces contamination significantly.

2) A 15 kHz (kilohertz) AC Wire Frequency: decreases contamination as the applied wire frequency is increased from 8 kHz. However low area coverage halftones are lost at higher frequencies.

3) A -50 volt Magnetic Roll DC Bias: reduces wire contamination, presumably because the donor roll mass loading is reduced and less material passes by the wires.

4) A -400 volt Donor Roll DC Bias: a high donor roll DC bias during retone and detone cycles reduce contamination slightly.

5) A Donor Roll Speed of 10 inches per second: reduced speed of the donor roll decreases wire contamination, presumably because less material passes by the wires. Stopping the donor roll momentarily and restarting it during detone helps to clean the wires.

6) A High Humidity: a high relative humidity of at least 55% appears to significantly reduce wire contamination. The specific mechanisms are presently...