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US 8,412,074 B2Granted
Charging roller for image forming apparatus and manufacturing method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-sub Shin, Jong-moon Eun, Hee-won Jung, Do-kwan Lee
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Abstract
Disclosed is a charging roller for an image forming apparatus capable of preventing the formations of surface scratches. The charging roller includes a roller shaft, a roller body formed on the roller shaft and a scratch prevention layer formed on the roller body. The scratch prevention layer contains inorganic crystal of polysilicate.
Claims13
A charging roller for use in an image forming apparatus, comprising:
- a roller shaft;
- a roller body formed on the roller shaft;
- and
- a scratch prevention layer formed on the roller body, wherein the scratch prevention layer contains therein inorganic crystal of polysilicate,
- wherein the scratch prevention layer has a film hardness that is 6H pencil hardness or greater.
2 more elements
An image forming apparatus, comprising:
- a photoconductor;
- a charging roller configured to charge the photoconductor to an electrical potential;
- a laser scanning unit configured to irradiate light on the photoconductor so as to thereby form an electrostatic latent image on the photoconductor;
- a developing unit configured to supply developer to the photoconductor so as to develop the electrostatic latent image into a developer image;
- a transferring unit configured to transfer the developer image from the photoconductor to a printing medium;
- and
- a fusing unit configured to fuse the developer image onto the printing medium,
- wherein the charging roller comprises:
- a roller shaft;
- a roller body formed on the roller shaft;
- and
- a scratch prevention layer formed on the roller body,wherein the scratch prevention layer contains therein inorganic crystal of polysilicate,
- wherein the scratch prevention layer has a film hardness that is 6H pencil hardness or greater.
10 more elements
A method of fabricating a charging roller useable in an image forming apparatus, comprising:
- forming a roller body on a roller shaft;
- and
- forming a scratch prevention layer, which contains inorganic crystal of polysilicate, on the roller body,
- wherein the forming of the scratch prevention layer comprises:
- preparing a coating composition that comprises a silica sol and a coating auxiliary material;
- coating the coating composition over the roller body;
- and
- heat-hardening the coating composition,
- wherein the scratch prevention layer has a film hardness that is 6H pencil hardness or greater.
6 more elements
Dependencies are inferred from the claim text.