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Browse Prior Art Database

CLEANING NIP STABILITY/MAGNETIC BRUSH

IP.com Disclosure Number: IPCOM000024281D
Original Publication Date: 1980-Feb-29
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 85K

Publishing Venue

Xerox Disclosure Journal

Abstract

A magnetic brush cleaning system for cleaning residual toner from a photoreceptor in a xerographic reproduction machine includes a magnetic brush roll having carrier beads thereon for removing toner from the photoreceptor and a reclaim roll for removing the toner from the magnetic brush roll. As can be seen in the figure, the magnetic brush roll 10 is located adjacent the photoreceptor 12, and the reclaim roll 14 is located adjacent the magnetic brush roll. To obtain optimum packing density of carrier beads and brush compression in the cleaning nip region "Aff, it is necessary that certain parameters be controlled. These parameters include the magnetic field intensity and positioning of stationary magnets 16 and 18 of the magnetic cleaning brush roll, the setting of the gaps t and the brush height of the brush created by the carrier beads (not shown). 1'

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(EROX DISCLOSURE JOURNAL

CLEANING NIP STABILITY /MAGNETIC BRUSH ~~ -~~~

John V. Cassidy Nero R. Lindblad Ivan Rezanka

Proposed Classification
U.S. Cl. 355/15 Int. Cl. G03g 21/00

1 r{ - Y A

A magnetic brush cleaning system for cleaning residual toner from a photoreceptor in a xerographic reproduction machine includes a magnetic brush roll having carrier beads thereon for removing toner from the photoreceptor and a reclaim roll for removing the toner from the magnetic brush roll. As can be seen in the figure, the magnetic brush roll 10 is located adjacent the photoreceptor 12, and the reclaim roll 14 is located adjacent the magnetic brush roll. To obtain optimum packing density of carrier beads and brush compression in the cleaning nip region "Aff, it is necessary that certain parameters be controlled. These parameters include the magnetic field intensity and positioning of stationary magnets 16 and 18 of the magnetic cleaning brush roll, the setting of the gaps t and the brush height of the brush created by the carrier beads (not shown). 1'

As shown, the pole faces of the magnets 16 and 18 should directly face the photo- receptor 12 to produce a "soft" brush in the cleaning nip region "A" and a stable packing density of carrier beads with a compression latitude. If a "hard" portion of the brush is in the cleaning nip region, there is no packing of carrier beads and brush compression is much less. The magnetic field strength (measured on the surface of the rotating cylinder...