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MAGNETIC BRUSH CLEANING SYSTEM

IP.com Disclosure Number: IPCOM000024707D
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 98K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a magnetic brush development system, toner particles are attracted tribo-electrically to magnetic carrier granules adhering releasably to a tubular member having a magnet disposed interiorly thereof. In this way, the toner particles are cleaned from the photoconductive surface. However, the toner particles there-after need to be cleaned from the carrier granules. Hereinbefore, this was accomplished by the utilization of a detoning roll which attracted the toner particles from the carrier granules. This prevented the carrier granules from being saturated with the toner particles. However, a system of this type is rather complex and expensive. In order to reduce the complexity of the system, a screen 10 may be employed in lieu of a detoning roll. As shown in Figure 1, screen 10 is positioned so that the developer material passing over blade 12 is forced there-through. Screen 10 is made from a very fine mesh material so that only the toner particles will pass therethrough to auger 14 for removal from the cleaning system. In operation, an elongated magnetic member 16 is disposed interiorly of tubular member 18. Tubular member 18 rotates in the direction of arrow 20 to transport carrier particles into contact with the residual toner particles adhering to the photoconductive surface 22. Blade 12 then removes the combined developer and residual toner particles from tubular member 18 and passes them through screen 10. Inasmuch as screen 10 has a very fine mesh, only the toner particles pass therethrough into auger 14 for subsequent removal from the cleaning system. The carrier granules return to tubular member 18 for subsequent recycling to remove other toner particles from photoconductive surface 22.

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XEROX DISCLOSURE JOURNAL

MAGNETIC BRUSH CLEANING SYSTEM Proposed Arthur Torrev Classification

U.S. Cl. 355/3 Int. Cl. GO3g 15/00

22

Volume 6 Number 5 September/October 1981 257

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

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MAGNETIC BRUSH CLEANING SYSTEM (Cont'd)

In a magnetic brush development system, toner particles are attracted tribo- electrically to magnetic carrier granules adhering releasably to a tubular member having a magnet disposed interiorly thereof. In this way, the toner particles are cleaned from the photoconductive surface. However, the toner particles there- after need to be cleaned from the carrier granules. Hereinbefore, this was accomplished by the utilization of a detoning roll which attracted the toner particles from the carrier granules. This prevented the carrier granules from being saturated with the toner particles. However, a system of this type is rather complex and expensive. In order to reduce the complexity of the system, a screen 10 may be employed in lieu of a detoning roll. As shown in Figure 1, screen 10 is positioned so that the developer material passing over blade 12 is forced there- through. Screen 10 is made from a very fine mesh material so that only the toner particles will pass therethrough to auger 14 for removal from the cleaning system. In operation, an elongated magnetic member 16 is disposed interiorly of tubular member 18. Tubular member 18 rotates in the direction of arrow 20 to transport car...