Carbon fiber commutator brush for a toner developing device and method for making
AssigneeXerox Corporation
InventorsJoseph A. Swift, John R. Andrews
Life of this patent
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Abstract
A commutator brush having carbon fibers encased in a resin matrix and extending outwardly therefrom and a method of making thereof. The carbon fibers are cold cut by a laser beam to minimize heating thereof. The commutative brush is in wiping contact with electrodes on a donor roll used in a development system of an electrophotographic printing machine.
Claims21
An electrical component having at least one end for electrically contacting another component, including:
- a support;
- and
- a plurality of electrically conductive fibers having at least a portion thereof extending outwardly from said support to form a brush like structure having a free end adapted to contact the other component with the free end being cold cut by a laser beam operating at a wave length ranging from about 150 nm to about 550 nm so as to minimize heating of the fibers being cut so that the laser beam heats the fibers during cold cutting to a maximum of about 300° C.
A method of making an electrical component having at least one end for electrically contacting another component, including:
- feeding a plurality of carbon fiber layers into a mold;
- surrounding the carbon fibers layers in the mold with a resin material;
- cutting the carbon fiber layers along opposed front and rear faces;
- applying a conductive adhesive to the rear face to bond the carbon fibers to one another;
- and
- cold cutting the front face with a laser beam operating in a wave length ranging from about 154 nm to about 550 nm to cut the fibers at a maximum temperature of about 300° C. so as to form a brush contacting region.
An apparatus for depositing developer material on a surface to develop a latent image recorded thereon, including:
- a donor roll, spaced from the surface and adapted to advance developer material to the latent image recorded on said surface;
- a plurality of electrodes disposed on said donor roll;
- and
- a commutator contacting said electrodes along a portion of the exterior circumferential surface of said donor roll, said commutator comprising a plurality of electrically conductive fibers to form a brush like structure having a free end adapted to contact said electrodes with the free end being cold cut by a laser beam operating in a wave length ranging from about 154 nm to about 550 nm to cut the fibers at a maximum.
Dependencies are inferred from the claim text.