Developing device and image forming apparatus having the same

A developing device and image technology, applied in the field of developing devices and image forming devices, can solve the problems of toner flying dust, toner failure to adhere, insufficient charging, etc., and achieve the effect of reducing re-floating

Active Publication Date: 2009-04-22
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a conventional image forming apparatus, for example, in a developing apparatus of an electrophotographic apparatus using an electrophotographic process, in the process of using an electric field to make the toner held by the developer holder adhere to the image holder, there are currently the following: Problem: Insufficiently charged toner will fail to adhere to the image holder, causing a phenomenon called toner flying, ie, it floats between the image holder and the developer holder

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 approach 1

[0047] figure 2 The overall configuration of Embodiment 1 in which a so-called tandem type electrophotographic apparatus equipped with the developing device of the present invention is shown. This electrophotographic device can be applied to a copier or a printer as an example.

[0048] Such as figure 2 As shown, the electrophotographic device has a device main body 11 for imaging. At the bottom of the device main body 11, a paper feeder 12 that can supply paper to the device 11 is provided. Document reading section 19 .

[0049] Here, an image forming unit 14 using a plurality of electrophotographic color components (for example, yellow (Y), magenta (M), cyan (C), and black (K)) is mounted on the main body 11 of the apparatus (specifically, 14Y, 14M, 14C, and 14K), an intermediate transfer belt 15 is provided that temporarily holds and conveys the toner images of the respective color components formed by the image forming units 14 onto paper.

[0050] In addition, in th...

Embodiment approach 2

[0068] Next, for the developing device 20 using the second embodiment of the present invention, use Figure 5 , 6 for explanation.

[0069] Figure 5 is the same as that of Embodiment 1 image 3 Corresponding longitudinal sectional explanatory diagram, Fig. 6 is that of Embodiment 1 Figure 4 Equivalent axial section illustration. In addition, in the second embodiment, components and configurations having the same functions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0070] Such as Figure 5 As shown, as the developing device 20 , a partition 48 is provided inside the developing container 21 , and has a lower developer stirring chamber 56 and an upper developer supply chamber 57 partitioned up and down by the partition 48 . One end of the partition 48 is fixed to the side of the developing container 21 , while the other end extends toward the developing roller 22 . In addition, the space...

Embodiment approach 3

[0077] Next, for the developing device according to Embodiment 3 using the present invention, use Figure 7 , 8 Be explained.

[0078] Figure 7 is the same as that of Embodiment 1 image 3 The corresponding longitudinal section explanatory drawing, Figure 8 is the same as that of Embodiment 1 Figure 4 Equivalent axial section illustration. In addition, in Embodiment 3, components and configurations having the same functions as those in Embodiment 1 and Embodiment 2 described above are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

[0079] Such as Figure 7 As shown, the developing device 20 has, inside the developing container 21 : a developer stirring chamber 76 ; a developer supply chamber 77 adjacent to the developer stirring chamber 76 ; and a recovery chamber 78 adjacent to the developer supply chamber 77 . Such as Figure 8 As shown, the developer stirring chamber 76 and the developer supply chamber 77 are partitioned b...

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PUM

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Abstract

The invention provides a developing device, comprising: a developing vessel containing developer composed of developer and carriers; a developer keeping body mounted on the developing vessel, facing to an image keeping body and keeping the developer; a developer supplying part mounted in the developing vessel and supplying developer to the developer keeping body; a developer stirring part mounted in the developing vessel, disposed in a chamber different from the developer supplying part and stirring the developer which should be supplied to the developer supplying part; and a developer recycling part mounted at the downstream of the rotary direction of the image keeping body with respect to the opposite part of the developer keeping body and the image keeping body and recycling floating toner so as to return the toner to the developer stirring part.

Description

technical field [0001] The present invention relates to a developing device and an image forming device using the same. Background technique [0002] As a conventional image forming apparatus, for example, in a developing apparatus of an electrophotographic apparatus using an electrophotographic process, in the process of using an electric field to make the toner held by the developer holder adhere to the image holder, there are currently the following: Problem: Insufficiently charged toner will fail to adhere to the image holder, causing a phenomenon called toner flying, ie, it floats between the image holder and the developer holder. [0003] In view of this problem, the following method is known: a recovery roller for recovering floating toner is provided in the developing device, and the floating toner recovered in the developing device is recovered and reused as a developer (for example, refer to Patent Document 1 ). In this Patent Document 1, a structure is disclosed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G21/10G03G15/01
CPCG03G15/08G03G15/0808G03G15/0822G03G15/0889G03G15/0891G03G21/12
Inventor 船田敦千原朋义
Owner FUJIFILM BUSINESS INNOVATION CORP
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