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Development device and image forming apparatus comprising same

A developing device and developer technology, applied in the direction of electric recording process using charge pattern, equipment for electric recording process using charge pattern, electrography, etc., can solve problems such as toner pollution and achieve the effect of preventing pollution

Active Publication Date: 2008-09-10
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even when the shutter is completely closed, there is a problem that the toner attached to the periphery of the shutter may fall or scatter due to vibrations, etc., causing contamination.

Method used

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  • Development device and image forming apparatus comprising same
  • Development device and image forming apparatus comprising same
  • Development device and image forming apparatus comprising same

Examples

Experimental program
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Embodiment approach 1

[0042] One embodiment of the present invention will be described below with reference to FIGS. 1 to 11 . In addition, the embodiment described below is an example of actualizing the present invention, and does not limit the technical scope of the present invention.

[0043] First, use figure 2 An overall configuration of an electrophotographic image forming apparatus 39 including a developing device 1 as one embodiment will be described. figure 2 It is a schematic explanatory diagram showing the overall configuration of the image forming apparatus 39 .

[0044] Image forming device 39 such as figure 2 A photoreceptor 27 is shown, and a charging device 21 , an exposure device 25 , a developing device 1 , a transfer device 22 , and a cleaning device 26 are disposed around the photoreceptor 27 .

[0045] The photoreceptor 27 is in the shape of a drum having a photosensitive material on its surface, and is driven to rotate in a direction indicated by an arrow F. As shown in FIG...

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PUM

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Abstract

The development device of the present invention has a rotating shutter supported rotatably between a supply opening formed on a toner supply device and a receiving opening formed on a developing tank. The rotating shutter has an open section extending in the axial direction of the roller-shaped main section as well as opened in the direction perpendicular to the axial direction thereof, opening and shutting the supply opening in conjunction with attachment and detachment operation of the developing tank. The rotating shutter shuts the supply opening by covering the supply opening with the outer surface of the roller-shaped main section, and opens the supply opening by communicating the supply opening and the receiving opening through the open section. Thus, it is possible to prevent the leakage of toner even after repetitively performing the attachment and detachment operation of the developing tank.

Description

technical field [0001] The present invention relates to a developing device used in image forming devices such as electrostatic copiers, laser printers, and facsimile machines, and an image forming device having the developing device. More specifically, it relates to a developing device using a two-component developer containing a toner and a carrier, and an image forming apparatus including the developing device. Background technique [0002] In an image forming apparatus using electrophotography, an electrostatic latent image is formed on a photosensitive drum, toner is attached to the latent image, a toner image is formed, and the toner image is transferred to recording paper to form an image. form. [0003] In such an image forming apparatus, development of an image forming apparatus of a two-component development method using a two-component developer containing a toner and a carrier has been developed in order to promote high speed and high image quality. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G2215/067G03G15/0886G03G15/087
Inventor 木村登彦林重贵明渡秀一须藤辉敬臼井智也
Owner SHARP KK
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