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Development device and method usedin electronic photographic image forming equipment

An electrophotographic and image technology, which is applied to the equipment of the electric recording process applying the charge pattern, the electric recording process applying the electric charge pattern, the electric recording technique, etc. Problems such as the inability to form a toner layer

Inactive Publication Date: 2004-08-04
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the toner sticks to the surface of the developing roller 5 and / or layer regulating member 7 as described above, a uniform toner layer cannot be formed.
Also, if the remaining toner repeatedly passes through the gap between the developing roller 5 and the layer regulating member 7 and rubs the layer regulating member 7 to increase the charging amount, new toner cannot be supplied to the developing roller 5.
Therefore, new toner cannot be sufficiently supplied to a partial area of ​​the image, and spots and streaks appear on a printed image, degrading the image quality

Method used

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  • Development device and method usedin electronic photographic image forming equipment
  • Development device and method usedin electronic photographic image forming equipment
  • Development device and method usedin electronic photographic image forming equipment

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Embodiment Construction

[0029] Reference will now be made in detail to the embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0030] figure 2 A sectional view showing an electrophotographic image forming apparatus according to an embodiment of the present invention.

[0031] A developing unit 100 includes a toner conveying body, which attaches toner to the developing unit and supplies the toner to a photoreceptor; a supply member, which supplies toner to the toner conveying body. and a regulating member that regulates the toner attached to said toner conveying body to have a predetermined thickness.

[0032] refer to figure 2 , shows a developing roller 110 as the toner transporting body. The developing roller 110 and a photosensitive drum 200 serving as a photosensitive body are...

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Abstract

A developing device used with an electrophotographic image forming apparatus and developing method thereof includes a power supplying unit which applies a first electric field to a toner transfer body and a supplying member so that the toner is supplied to the toner transfer body when a development operation is performed, and applies a second electric field to the toner transfer body and the supplying member so that the toner is removed from the toner transfer body when the development operation is not performed, by varying a developing bias and a supplying bias.

Description

technical field [0001] The present invention relates to an electrophotographic image forming device, especially a developing device and developing method used in the electrophotographic image forming device. The device provides a developing medium for a photoreceptor and develops the photoreceptor. Background technique [0002] In general, an electrophotographic image forming apparatus obtains an electrostatic latent image corresponding to a desired image by irradiating light to a photoreceptor, forms a toner image by supplying toner onto the electrostatic latent image, and the toner image is Transfer to a recording medium, and dissolve the toner on the recording medium, thereby printing an image. [0003] figure 1 A schematic sectional structure showing a conventional electrophotographic image forming apparatus. refer to figure 1 , the conventional electrophotographic image forming apparatus includes a photoreceptor 1 , a charging roller 2 , an exposure unit 3 , a develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/06G03G21/00
CPCG03G21/0064G03G15/08
Inventor 李德熙
Owner SAMSUNG ELECTRONICS CO LTD