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Browse Prior Art Database

FOAM AIR CLEANER

IP.com Disclosure Number: IPCOM000024087D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 281K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a conventional brush cleaner used in xerographic machines, toner is dislodged off the photoreceptor through mechanical forces exerted by the brush. The dislodged toner is transported by the air stream generated in the shroud surrounding the brush. Some of the toner is redeposited back on to the photoreceptor through impact forces when the brush first enters the photoreceptor/brush nip region. Unfortunately, in this region static pressure is above atmosphere (because of brush rotation) unless a large vacuum blower is employed. Thus, this portion of toner remains and adds to reduced cleaning efficiency. Conversely, in some methods desired cleaning efficiency is achieved by providing larger mechanical forces at the expense of photoreceptor life.

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XEROX DISCLOSURE JOURNAL

FOAM AIR CLEANER Proposed Classification
A. T. Manghirmalani U.S. Cl. 355/15
I. Rezanka mt. CI. G03g 21/00

PHOTORECEPTOR

In a conventional brush cleaner used in xerographic machines, toner is dislodged off the photoreceptor through mechanical forces exerted by the brush. The dislodged toner is transported by the air stream generated in the shroud surrounding the brush. Some of the toner is redeposited back on to the photoreceptor through impact forces when the brush first enters the photoreceptor/brush nip region.

Unfortunately, in this region static pressure is above atmosphere (because of brush rotation) unless a large vacuum blower is employed. Thus, this portion of toner remains and adds to reduced cleaning efficiency. Conversely, in some methods desired cleaning efficiency is achieved by providing larger mechanical forces at the expense of photoreceptor life.

The enclosed idea does away with these problems. A composite roll I rotates inside a shroud 2. The composite roll is made of a foam, spongy~-typematerial through which air suction can be applied. The outer shell 3 of roll material comprises foam material with relatively small holes compared to the inside shell ~ which is made of foam material with larger holes. The small holes on the outer layer provide a large surface area for dislodging the toner off the photoreceptor. In a sense, they may be envisioned as enumerable small blades. The inside shell comprises big holes to

yield th...