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Developing device and image forming apparatus having the 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 the problems such as the reduction of charging performance of toner, and achieve the development dose-stable effect

Active Publication Date: 2016-09-28
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the carrier that is stirred together with the toner in the developing container deteriorates as the stirring frequency increases, and as a result, the charge-imparting performance of the carrier to the toner gradually decreases.

Method used

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  • Developing device and image forming apparatus having the same
  • Developing device and image forming apparatus having the same
  • Developing device and image forming apparatus having the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] right in figure 1 In the color printer 100 shown, changes in the amounts of developers in the developing devices 3 a to 3 d were investigated when the conveying speed of the developer, the toner density, and the absolute humidity were changed. In addition, the test was performed in the cyan image forming part Pa including the photosensitive drum 1 a and the developing device 3 a.

[0072] As a test method, the developing device 3a of the present invention was as Figure 5 As shown: the rotating shaft 44b of the second stirring screw conveyor 44 is connected with the second bias circuit 31 and the voltage variable device 32, and the inner wall surface of the second conveying chamber 22d opposite to the restricting part 52 is equipped with a weak magnetic The conductive plate 70 is made of stainless steel (SUS304). In the developing device 3a of the comparative example, the second bias circuit 31 and the voltage variable device 32 are not connected to the rotating shaft ...

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PUM

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Abstract

A developing device according to the present disclosure includes a developer container, a first stirring member, a second stirring member, and a developer carrying member. The developer container has a plurality of conveyance chambers including first and second conveyance chambers, is provided with a developer supply portion and a developer discharge portion and stores a two-component developer. The second stirring member is provided with an electro-conductive regulating portion that is disposed to oppose the developer discharge portion that regulates movement of the developer to the developer discharge portion. An electro-conductive plate is disposed on an inner wall surface of the developer container that opposes the regulating portion. During rotation of the first and second stirring members, by applying an alternating current bias to at least one of the regulating portion and the electro-conductive plate to generate an electric potential difference between the regulating portion and the electro-conductive plate.

Description

technical field [0001] The present invention relates to a developing device used in image forming devices such as copiers, printers, facsimile machines, and digital multifunction machines using electrophotography, and an image forming device including the developing device. In particular, the supply is composed of toner and carrier A developing device that discharges a two-component developer and discharges the remaining developer, and an image forming apparatus provided with the developing device. Background technique [0002] In an image forming apparatus, a latent image formed on an image carrier made of a photoreceptor or the like is developed by a developing device and visualized as a toner image. As one of such developing devices, a two-component developing system using a two-component developer is employed. This type of developing device accommodates a developer consisting of a carrier and toner in a developing container, is provided with a developing roller that sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/09
CPCG03G15/0887G03G15/0889G03G15/0907G03G21/1652G03G15/0893G03G15/0844
Inventor 末浪浩二
Owner KYOCERA DOCUMENT SOLUTIONS INC