Browse Prior Art Database

WIRE VOLTAGE OFFSET FOR HYBRID SCAVENGELESS DEVELOPMENT

IP.com Disclosure Number: IPCOM000027368D
Original Publication Date: 1996-Jun-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 70K

Publishing Venue

Xerox Disclosure Journal

Abstract

Biasing the wires of a Hybrid Scavengeless Development (HSD) system with a voltage offset relative to the donor roll is known to reduce wire contamination. Proposed is a specific implementation with an AC voltage offset having a frequency which is different

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XEROX DISCLOSURE JOURNAL

WIRE VOLTAGE OFFSET FOR HYBRID SCAVENGELESS DEVELOPMENT U. S. C1.355/271
Mark J. Hirsch
Steven C. Hart
Michael G. Swales

Proposed Classification

ht. C1. G03G 1511 4

I

I I

26

XEROX DISCLOSURE JOURNAL - Vol. 21, No. 3 May/June 1996 227

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WIRE VOLTAGE OFFSET FOR HYBRID SCAVENGELESS DEVELOPMENT (CONT'D)

Biasing the wires of a Hybrid Scavengeless Development (HSD) system with a voltage offset relative to the donor roll is known to reduce wire contamination. Proposed is a specific implementation with an AC voltage offset having a frequency which is different

than the AC wire voltage frequency. A schematic illustration of the proposed implementation is shown in the accompanying Figure depicting HSD system 10. As shown, HSD system 10 is comprised of a housing 12, magnetic roll 14, donor roll 16, and at least one wire 20, powered by an AC power supply (vwAC) 18. In addition to adding a DC offset voltage (vdonm) 24 equal to a donor roll to magnetic roll potential (Vdm) 26, the implementation also adds a donor roll AC power supply (VdonAC) 22 between wire 20 and a donor roll DC power supply (vdonm) 24. Thus, the implementation incorporates the biasing wire 20 with a DC offset, which is differentiated by the addition of an AC offset.

REFERENCES

U.S. Patent No. 5,3 11,258 issued to Brewington et al on May 10, 1995, discloses biasing the wires of an HSD development housing with a DC offs...