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VARIABLE MAGNETIC FIELD COMPENSATION FOR AGING DEVELOPER MATERIAL

IP.com Disclosure Number: IPCOM000024047D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 155K

Publishing Venue

Xerox Disclosure Journal

Abstract

In the development system of an electrophotographic printing machine, an elongated magnet is disposed interiorly of a tubular member, As the tubular member rotates, conductive single component developer material is advanced into contact with the latent image recorded on the photoconductive surface. It has been found that the conductivity of the developer material changes with age. More particularly, the conductivity decreases. However, if the magnet is rotated slightly to increase tangential component of the magnetic field in the development zone nip, the developer material conductivity is increased. Thus, the developer material conductivity may be maintained at an optimum value by rotating the magnet relative to the development zone so as to maintain the material at the desired conductivity.

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XEROX DISCLOSURE JOURNAL

VARIABLE MAGNETIC FIELD Proposed Classification COMPENSATION FOR AGING U.S. CI, 118/653 DEVELOPER MATERIAL mt. Cl. G03g 15/08
R. E. Hewitt

In the development system of an electrophotographic printing machine, an elongated magnet is disposed interiorly of a tubular member, As the tubular member rotates, conductive single component developer material is advanced into contact with the latent image recorded on the photoconductive surface. It has been found that the conductivity of the developer material changes with age. More particularly, the conductivity decreases. However, if the magnet is rotated slightly to increase tangential component of the magnetic field in the development zone nip, the developer material conductivity is increased. Thus, the developer material conductivity may be maintained at an optimum value by rotating the magnet relative to the development zone so as to maintain the material at the desired conductivity.

Volume 4 Number 4 duly/August 1979 449

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   XEROX DISCLOSURE JOURNAL Volume 4 Number 4 ~uly/~ugust 1979

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