Browse Prior Art Database

SCAVENGELESS ELECTRODED DONOR ROLL HAVING ACTIVE CURRENT LIMITING CIRCUIT

IP.com Disclosure Number: IPCOM000027246D
Original Publication Date: 1995-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 94K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to scavengeless electroded donor roll development using an AC biasing voltage. More particularly, the disclosure relates to a donor roll assembly usable for such development, and including an active current limiting protection circuit.

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XEROX DISCLOSURE JOURNAL

SCAVENGELESS ELECTRODED Proposed Classification DONOR ROLL HAVING ACTIVE
CURRENT LIMITING CIRCUIT
William H. Wayman

U.S. C1.355/259 Int. C1. G03g 15/06

XEROX DISCLOSURE JOURNAL - Vol. 20 No. 6 NovembedDecember 1995 511

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SCAVENGELESS ELECTRODED DONOR ROLL HAVING ACTIVE CURRENT LIMITING CIRCUIT(Cont'd)

This disclosure relates to scavengeless electroded donor roll development using an AC biasing voltage. More particularly, the disclosure relates to a donor roll assembly usable for such development, and including an active current limiting protection circuit.

Typically, development using such a conventional scavengeless electroded donor roll can be maximized by maximizing the biasing AC voltage. Unfortunately, however, maximizing the AC voltage ordinarily leads undesirably to arcing and early electroded donor roll burnout. Sustained arcing can destroy the electroded roll due to the formation of carbon that permanently electrically shorts two or more electrodes together. This disclosure provides an active current limiting circuit device that is connected between the AC voltage source and the electroded donor roll for momentarily reducing and limiting the AC voltage actually applied to the donor roll in the event of a current surge, thereby preventing undesirable arcing and early donor roll burnout.

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