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CARRIER MIXER FOR CAPTIVE MAGNETIC BRUSH

IP.com Disclosure Number: IPCOM000024442D
Original Publication Date: 1980-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 1 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

A conventional, magnetic brush roll for cleaning residual toner from a photo-receptor has a rotatably mounted, non-magnetic cylinder and magnets stationarily mounted within the cylinder so that a brush can be formed from magnetizable carrier on the surface of the cylinder. It is known, however, that approximately 50% of the carrier on the cylinder is not in use because the lower layer of carrier adjacent to the surface of the cylinder serves no cleaning function. Consequently, carrier life is reduced. To increase the carrier life, the carrier on the surface of the cylinder should be mixed during operation of the magnetic brush roll so that the lower layer of carrier adjacent to the surface of the cylinder is also active in cleaning.

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I XEROX DISCLOSURE JOURNAL

CARRIER MIXER FOR CAPTIVE Proposed MAGNETIC BRUSH Classification

U.S. C1. 355/15
Int. CI. G03g 21/00

A conventional, magnetic brush roll for cleaning residual toner from a photo- receptor has a rotatably mounted, non-magnetic cylinder and magnets stationarily mounted within the cylinder so that a brush can be formed from magnetizable carrier on the surface of the cylinder. It is known, however, that approximately 50% of the carrier on the cylinder is not in use because the lower layer of carrier adjacent to the surface of the cylinder serves no cleaning function. Consequently, carrier life is reduced. To increase the carrier life, the carrier on the surface of the cylinder should be mixed during operation of the magnetic brush roll so that the lower layer of carrier adjacent to the surface of the cylinder is also active in cleaning.

The above figure shows a magnetic cylinder 12 and cylinder. Toner removed

                  magnetic brush roll 10 having a rotatably mounted, non- a plurality of magnets 14 stationarily mounted within the from a photoreceptor 16 is carried away by the cylinder 12 to a reclaim roll 18 where the toner is removed from the carrier on the cylinder. To mix the carrier on the surface of the cylinder 12, two offset rows of non- magnetic pins 20 are located as shown; non-magnetic pins being used so that the carrier does not build up on the pins and cause a daming effect in the pin area.

Volume 5 Number 4 July/August 1980 435

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