Browse Prior Art Database

BRUSH CHARGING

IP.com Disclosure Number: IPCOM000024684D
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 66K

Publishing Venue

Xerox Disclosure Journal

Abstract

This invention relates to the charging of photoreceptors in the electrostatographic process for making copies. Conventionally, such charging is obtained by way of a corona produced by a corotron, which is essentially a thin wire under a high applied voltage (in the order of 6,000 to 9,000 volts). The present invention provides that such charging of a photoreceptor be carried out by a novel metallic fiber brush.

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XEROX DISCLOSURE JOURNAL

BRUSH CHARGING Proposed Richard F. Bergen Classification

U.S. C1. 430/35 Int. CI. G03g 17/04

This invention relates to the charging of photoreceptors in the electrostatographic process for making copies. Conventionally, such charging is obtained by way of a corona produced by a corotron, which is essentially a thin wire under a high applied voltage (in the order of 6,000 to 9,000 volts). The present invention provides that such charging of a photoreceptor be carried out by a novel metallic fiber brush.

The metallic fiber brush for charging of the present invention is made of a plurality of extremely fine metallic wire fibers woven into a cloth base. The metallic fibers may be made of such electrically conducting metals as steel. The individual fibers may have a diameter in the order of about 4 to 12 microns. The length of the fibers may be varied over a wide range. I prefer to use fibers about 1/2 to 3/4 inch long, although that is not critical. Such fibers can be packed to a density of from about 12,000 fibers per square inch to several hundred thousand fibers per square inch. Conductive layers may be provided on both sides of the cloth base and electrical connection to the brush can be made through the conductive layer to simultaneously make electrical contact to all the fibers in the brush.

When a brush made in accordance with the present invention was used to charge a photoreceptor, a uniform charging of the photoreceptor was obtained...