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Developing device and image forming device having same

A developing device and developer technology, which are applied in the fields of image forming devices and developing devices, and can solve problems such as toner charging performance degradation and the like

Active Publication Date: 2019-11-15
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 device having same
  • Developing device and image forming device having same
  • Developing device and image forming device having same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] in figure 1 In the illustrated color printer 100, changes in the amount of developer in the developing devices 3a to 3d when the conveying speed, toner concentration, and absolute humidity of the developer are changed were investigated. In addition, experiments were conducted in the cyan image forming section Pa including the photosensitive drum 1a and the developing device 3a.

[0074] As an experimental method, Figure 5 The illustrated developing device 3a in which the disc 55 is arranged between the second spiral blade 44a of the second stirring screw conveyor 44 and the restricting portion 52 is the present invention. In addition, Figure 7 The illustrated developing device 3a in which the disc 57 is arranged between the restricting portion 52 and the discharge blade 53 is taken as a comparative example.

[0075] The second spiral blade 44a of the second spiral agitating conveyor 44 used in the present invention and the comparative example is a spiral blade with an oute...

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PUM

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Abstract

A developing device has a developer container, first and second stirring members, and a developer carrying member. The developer container has a plurality of transport chambers including first and second transport chambers, a communication portion through which the first and second transport chambers mutually communicate in opposite end parts thereof in their longitudinal direction, a developer supply port, and a developer discharge port arranged in a downstream-side end part of the second transport chamber. The second stirring member has a second transport blade, a regulating portion formed on the downstream side of the second transport blade, a discharge blade formed on the downstream side of the regulating portion and discharging developer through the developer discharge port, and a disk formed at a position facing the downstream-side communication portion on the upstream side of the regulating portion and radially protruding over the entire circumference of a rotary shaft.

Description

Technical field [0001] The present invention relates to a developing device used in an image forming apparatus such as a copier, a printer, a facsimile machine, and a digital multifunction machine having the above-mentioned functions using an electrophotographic method, and an image forming apparatus having the developing device, and in particular to a replenishment of toner and A developing device that is a two-component developer composed of a carrier and discharges the remaining developer and an image forming device having the same. Background technique [0002] In an image forming apparatus, a latent image formed on an image carrier composed 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 method using two-component developer is adopted. This kind of developing device contains a two-component developer consisting of a carrier and a toner (hereinafter referred to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0865G03G15/0891G03G15/0893G03G2215/083G03G2215/0838
Inventor 佐佐木侑
Owner KYOCERA DOCUMENT SOLUTIONS INC
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