Developing apparatus and image forming apparatus

A developing device and developer technology, which are applied to the electric recording process using charge patterns, equipment and instruments of the electric recording process applying charge patterns, etc. The effect of preventing uneven concentration, preventing scattering, and providing sufficient sealing performance

Active Publication Date: 2015-06-24
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the development of an electrostatic latent image requires the toner contained in the two-component developer stored in the developing device to move to the photoreceptor as described above, the toner scatter to pollute the inside of the device or cause no latent image to be formed. Parts also adhere to toner and cause staining

Method used

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  • Developing apparatus and image forming apparatus
  • Developing apparatus and image forming apparatus
  • Developing apparatus and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0171] Use based on figure 1 For the developing device having the configuration shown in , the dimensions of the layer thickness regulating member 14 and the magnetic sealing member 20 were changed to evaluate toner scattering and the like.

[0172] A non-magnetic material made of SUS304 austenitic stainless steel was used as the material of the layer thickness regulating member 14 . The layer thickness regulating member 14 has a length of 330 mm and a width of 10 mm. The rectangular cutout 14 a is provided at a position facing the surface of the developing sleeve 17 corresponding to the non-image portion of the photoreceptor 3 so that the long side of the rectangle opens toward the developing sleeve 17 . The length of the long side of the cutout 14a is 5 mm.

[0173] As the material of the magnetic sealing member 20, SUS430 was used. The magnetic seal member 20 is provided at a position facing the surface of the developing sleeve 17 corresponding to the photoreceptor 3 on ...

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PUM

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Abstract

A developing apparatus including a layer thickness adjustment member configured to regulate a layer thickness of a two-component developer carried on a surface of a developing sleeve of a developing roller is disposed so that one end portion in a width direction faces the surface of the developing sleeve at a predetermined interval. At two end portions in a longitudinal direction of the layer thickness adjustment member, a notch open to the one end side in the width direction is provided. Since an amount of conveyance of the developer locally increases at two end portions of the developing sleeve by providing such a notch in the layer thickness adjustment member, density of an ear of a magnetic brush to be formed increases, and it is possible to exhibit the sufficient seal performance and prevent the toner from being scattered.

Description

technical field [0001] The present invention relates to a developing device and an image forming device for developing an electrostatic latent image formed on a photoreceptor using a two-component developer composed of a toner and a carrier. Background technique [0002] An electrophotographic image forming apparatus that forms an image by electrophotography can be used as an electrostatic copier, a laser beam printer, or the like. An electrophotographic image forming apparatus is provided with a developing device for developing an electrostatic latent image formed on an image carrier such as a photoreceptor. As a development method, there is known a two-component development method in which development is performed using a two-component developer (hereinafter, also simply referred to as a developer) containing a toner and a carrier. [0003] In the two-component development method, the toner can be supported on the surface of the carrier by stirring the carrier and the ton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/00
CPCG03G15/0817G03G15/0887G03G15/0942G03G15/0812G03G15/0808
Inventor 森本清文大川猛司
Owner SHARP KK
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