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US 4,377,229 AGranted
Apparatus for conveying copy sheet for electrophotographic copying machine
AssigneeOlympus Optical Co., Ltd.
InventorsKiyoshi Miyashita, Tatuo Takizawa, Kazuo Sugawa, Masaji Nishikawa
Life of this patent
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Abstract
A conveying apparatus includes a plurality of pairs of conveying rollers which are disposed for abutment against each other for transporting a copy sheet carrying an unfixed toner image thereon toward a fixing unit. A cleaning member is disposed for abutment against those rollers which are adapted to contact the toner image to clean them and to charge them triboelectrically to the same polarity as the toner.
Claims7
An apparatus for conveying a copy sheet for an electrophotographic copying machine, comprising:
- a plurality of pairs of conveying rollers fixedly mounted on a pair of vertically aligned support shafts and abutting against each other to hold and convey a copy sheet therebetween which carries an unfixed toner image;
- and
- a plate-shaped cleaning and charging member disposed in direct abutment against the peripheral surface of one or more of said conveying rollers which are arranged to contact the unfixed toner image on the copy sheet, said plate-shaped cleaning and charging member operating to slidingly contact and thereby charge said one or more conveying rollers to the same polarity as the polarity of the toner by triboelectricity to repel the deposition of toner on said one or more conveying rollers and to clean said one or more conveying rollers if any toner is deposited thereon.
Dependencies are inferred from the claim text.