Browse Prior Art Database

DEVELOPER PICK-OFF STRUCTURE FOR REMOVING DEVELOPER FROM A DEVELOPER ROLL

IP.com Disclosure Number: IPCOM000026151D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to a magnetic brush development apparatus for developing toner images on a charge retentive surface. The developer apparatus comprises a stationary developer core 10 and a rotating tube or roll 14. The core 10 is provided with a magnetic pole 16 disposed adjacent a developer pick-off area 18. A crossmixer pick-off blade 20 has its free end supported in the pick-off area as shown. Due to the magnetic field flux change at the point of developer pick-off, the developer material forms chains along the lines of force, perpendicular to the surface of the developer roll. These chains extend out from the surface of the roll instead of lying flat on it and are thus picked off by the crossmixer blade.

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XEROX DISCLOSURE JOURNAL

DEVELOPER PICK-OFF Proposed Classification STRUCTURE FOR REMOVING US. C1.355/200 DEVELOPER FROM A
DEVELOPER ROLL
George E. Bell
Bruce D. MacLellan

Int. C1. G03g 15/00

I

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XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 229

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DEVELOPER PICK-OFF STRUCTURE FOR REMOVING DEVELOPER FROM A DEVELOPER ROLL(Cont'd)

This disclosure relates to a magnetic brush development apparatus for developing toner images on a charge retentive surface. The developer apparatus comprises a stationary developer core 10 and a rotating tube or roll
14. The core 10 is provided with a magnetic pole 16 disposed adjacent a developer pick-off area 18. A crossmixer pick-off blade 20 has its free end supported in the pick-off area as shown. Due to the magnetic field flux change at the point of developer pick-off, the developer material forms chains along the lines of force, perpendicular to the surface of the developer roll. These chains extend out from the surface of the roll instead of lying flat on it and are thus picked off by the crossmixer blade.

230 XEROX DISCLOSURE JOURNAL - VO~. 15, NO. 4 July/August 1990

[This page contains 1 picture or other non-text object]