Paper-feed roller and fabrication method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorYong-hyun Lee
Life of this patent
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Abstract
A paper-feed roller and a fabrication method thereof in an office automation machine, such as a photocopier, a printer, and a facsimile machine, etc, includes forming a plastic roller along a general stainless shaft by a molding and forming a ceramic coating layer on a surface of the plastic roller. Accordingly, the paper-feed roller is capable of providing an economical effect in a fabrication cost and preventing a slipping of paper or a paper jam that is caused by a heat distortion and an abrasion occurring on a surface of a long time operated roller.
Claims24
A paper-feed roller for use in an image forming apparatus forming an image on paper, comprising:
- a shaft;
- a roller disposed along the shaft and made of a plastic;
- and
- a ceramic coating layer formed on a surface of the roller to contact the paper;
- wherein the ceramic coating layer comprises,
- ceramic particles jetted onto the roller and directly formed on the roller without using an intervening material between the roller and the ceramic particles to attach the ceramic particles to the roller.
A method of fabricating a paper-feed roller for use in an image forming apparatus, the method comprising:
- forming a metallic shaft;
- forming a plastic roller along the metallic shaft by a molding process;
- and
- forming a ceramic coating layer of a thickness equal to or below 2,000 μm on a surface of the plastic roller,
- wherein the forming of the ceramic coating layer comprises jetting a processing gas including ceramic particles onto the surface of the plastic roller from a cathode being distanced from the plastic roller by 10-20 mm in conditions including that a degree of vacuum ranges from 10−2 to 10−3 torr, a voltage is equal to, or below 0.1 W/cm2, and a low pressure plasma of the processing gas is an argon gas and an oxygen gas.
A method of fabricating a paper-feed roller for use in an image forming apparatus, the method comprising:
- forming a metallic shaft;
- forming a plastic roller along the metallic shaft by a molding process;
- forming a ceramic coating layer of a thickness equal to or below 2,000 μm on a surface of the plastic roller;
- and
- forming a sealed layer made of one of epoxy and wax on the ceramic coating layer.
A paper-feed roller of an image forming apparatus forming an image on paper, comprising:
- a shaft;
- a roller disposed along the shaft, made of a plastic or rubber material, and having a cylindrical surface, sidewalls, and rounded corners formed between the cylindrical surface and respective ones of the sidewalls;
- a ceramic coating layer formed on the cylindrical surface of the roller to contact the paper;
- and a sealed layer on the ceramic coating layer and the rounded corners.
Dependencies are inferred from the claim text.