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Method and apparatus for applying developing bias voltage in image forming apparatus

A technology of bias voltage and imaging device, which is applied in the fields of electric recording process using charge pattern, equipment for electric recording process using charge pattern, and electrography, etc., and can solve image staining, device contamination, and toner scattering And other issues

Inactive Publication Date: 2007-04-25
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the toner is easily scattered by the voltage difference between the developing roller and the photosensitive medium, which can cause image smear and device contamination

Method used

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  • Method and apparatus for applying developing bias voltage in image forming apparatus
  • Method and apparatus for applying developing bias voltage in image forming apparatus
  • Method and apparatus for applying developing bias voltage in image forming apparatus

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Embodiment Construction

[0019] Matters defined in this specification, such as specific structures and elements, are provided to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0020] Referring to FIGS. 1 and 2, an electrophotographic image forming apparatus 100 prints an image on paper using an electrophotographic process. The electrophotographic imaging device 100 includes: a box body 110 on which the paper P is stacked, and the box body 110 can be installed to the main body 101 or can be detached from the main body 101 .

[0021] The box body 110 is elastically biased upward by a spring 112 and includes a paper support 111 on which the paper P is stacked. The p...

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PUM

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Abstract

A method and apparatus for applying a developing bias voltage of an image forming apparatus are provided. When an image is formed on paper, an AC bias voltage and a DC bias voltage are applied in an overlapping manner to the developing roller, and when an image is not formed on paper, the AC bias voltage is turned off and only the DC bias voltage is applied to the developing roller.

Description

technical field [0001] The invention relates to a method and a device for applying a developing bias voltage in a non-contact imaging device. More particularly, the present invention relates to a method and apparatus for applying a developing bias voltage in a non-contact type image forming apparatus, by which, when a sheet is separated from another sheet by a predetermined gap during a printing operation, Prevents toner from moving from the developer roller to the photosensitive media. Background technique [0002] In general, an image forming apparatus using electrophotography forms an electrostatic latent image on a photosensitive medium in response to a digital image signal using an exposure unit such as a laser scanning unit, develops the electrostatic latent image using a developer, and transfers the developed image to a recording medium. And a device that fixes the transferred image on the recording medium by heating and pressure, thereby forming an image. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G15/0813G03G2215/0619
Inventor 慎重光金镇喆梁裕锡
Owner SAMSUNG ELECTRONICS CO LTD