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PULTRUDED CARBON FIBER COMPOSITES FOR LOW VOLTAGE CHARGING

IP.com Disclosure Number: IPCOM000026983D
Original Publication Date: 1994-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed are electroconductive pultruded carbon fiber composites for low voltage charging applications, for use, for example, in electrostatic charging of photoreceptors in printing and copying machines. The pultruded carbon fiber composites are comprised of conductive pultruded carbon fiber filler filaments that are dispersed in a continuous thermoplastic matrix. The pultrusion composite article is generally a long strip of any desired cross section which may be cut by a variety of means, for example, mechanical sawing, lasering, or water jetting. In particular, water jetting provides a very clean surface on the cut pultrusion article with free carbon fibers protruding a short distance, on the order of thousandths of an inch, so that there is a very short and uniform brush on the cut surface. The surface cut pultrusion articles may be fashioned into, for example, a strip brush for use in charging an electrostatographic applications wherein the brush has a uniform high density of very fine conductive fibers on the surface. Since the free ends of the carbon fibers are short, the fibers are unable to agglomerate as they do in a free fiber brush, so that charging uniformity is maintained. The polymeric matrix which holds the pultruded fibers also provides large area compliance to the photoreceptor surface.

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XEROX DISCLOSURE JOURNAL

PULTRUDED CARBON FIBER Proposed Classification COMPOSITES FOR LOW VOLTAGE
CHARGING
Int. C1. G03g 21/00 Joan R. Ewing

US. C1.355/301

Disclosed are electroconductive pultruded carbon fiber composites for low voltage charging applications, for use, for example, in electrostatic charging of photoreceptors in printing and copying machines. The pultruded carbon fiber composites are comprised of conductive pultruded carbon fiber filler filaments that are dispersed in a continuous thermoplastic matrix. The pultrusion composite article is generally a long strip of any desired cross section which may be cut by a variety of means, for example, mechanical sawing, lasering, or water jetting. In particular, water jetting provides a very clean surface on the cut pultrusion article with free carbon fibers protruding a short distance, on the order of thousandths of an inch, so that there is a very short and uniform brush on the cut surface. The surface cut pultrusion articles may be fashioned into, for example, a strip brush for use in charging an electrostatographic applications wherein the brush has a uniform high density of very fine conductive fibers on the surface. Since the free ends of the carbon fibers are short, the fibers are unable to agglomerate as they do in a free fiber brush, so that charging uniformity is maintained. The polymeric matrix which holds the pultruded fibers also provides large area compliance to the photoreceptor surface.

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