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IMPROVED MAGNETIC DESIGN FOR MAGNETIC BRUSH DEVELOPMENT

IP.com Disclosure Number: IPCOM000024043D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 217K

Publishing Venue

Xerox Disclosure Journal

Abstract

An electrophotographic printing machine frequently employs a magnetic brush development system for depositing toner particles on an electrostatic latent image recorded on a photoconductive member, The magnetic brush development roller includes a non-magnetic, tubular member 10 having a substantially stationary, cylindrical magnet 12 disposed interiorly thereof, As tubular member 10 rotates in the direction of the arrow, developer material 14 is advanced into contact with the latent image recorded on photoconductive surface 16. A magnet 18 is disposed on the opposed side of photoconductive member 16.

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XEROX DISCLOSURE JOURNAL

IMPROVED MAGNETIC DESIGN FOR MAGNETIC BRUSH DEVELOPMENT

S. Hwa
G. Whittaker

Proposed Classification

U.S. Cl. 118/644 mt. CI. B05b 5/02

An electrophotographic printing machine frequently employs a magnetic brush development system for depositing toner particles on an electrostatic latent image recorded on a photoconductive member, The magnetic brush development roller includes a non~magnetic, tubular member 10 having a substantially stationary, cylindrical magnet 12 disposed interiorly thereof, As tubular member 10 rotates in the direction of the arrow, developer material 14 is advanced into contact with the latent image recorded on photoconductive surface 16. A magnet 18 is disposed on the opposed side of photoconductive member 16.

In order to optimize advancement of the developer mixture from the sump to the latent image recorded on photoconductive member 16, the magnetic forces attracting the developer mixture to tubular member 10 are relatively high.

However, it is desirable to have relatively low magnetic forces within the nip region. This may be achieved by utilizing a magnet 18, disposed on the opposed side of photoconductive member 10, to produce relatively weak forces in the nip region while there are relatively strong magnetic forces in all other regions.

Volume 4 Number 4 july/August 1979 4~

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                  XEROX DISCLOSURE JOURNAL 442 Volume 4 Number 4 July/August 1979

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