Image forming apparatus

An image and developing device technology, which is applied in the direction of electric recording process applying charge pattern, electric recording process applying electric charge pattern, equipment of electric recording process applying electric charge pattern, etc., to achieve the effect of suppressing image defects

Inactive Publication Date: 2013-10-30
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When forming an image, there is a problem that if the accumulated toner or toner aggregates move to the developing roller and get caught in the gap between the magnetic roller and the regulating member, image defects such as vertical stripes will occur on the image.

Method used

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Examples

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Embodiment Construction

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments. In addition, the application of the invention and the terms and the like shown here are not limited thereto.

[0017] figure 1 It is a diagram schematically showing the configuration of an image forming apparatus including a developing device according to an embodiment of the present invention. The image forming apparatus 1 is a tandem color printer. The rotatable photoreceptors 11 a to 11 d use an organic photoreceptor (OPC photoreceptor) as a photosensitive material forming a photosensitive layer, and are arranged to correspond to various colors of magenta, cyan, yellow, and black. Around each photoreceptor 11a-11d, the developing devices 2a-2d, the exposure unit 12, the chargers 13a-13d, and the cleaning devices 14a-14d are arrange|positioned.

[0018] The developing devices 2a to 2d are arranged to face t...

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PUM

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Abstract

An image forming apparatus (1) includes a controller (160, 132) that controls rotational driving of a magnetic roller (21) and rotational driving of a developing roller (20). The controller (160, 132) is capable of performing a toner collecting mode when no image formation is performed. In the toner collecting mode, the magnetic roller (21) and the developing roller (20) are intermittently rotated in a direction reverse to a direction in which the magnetic roller 21 and the developing roller (20) are rotated during image formation, then the magnetic roller (21) is made to rotate in a forward direction, and then, the magnetic roller (21) is rotated in a backward direction.

Description

technical field [0001] The present invention relates to image forming apparatuses such as copiers, printers, facsimile machines, and their compound machines, and particularly relates to using a developer containing toner and a magnetic carrier, and only the toner is carried on a developing roller for photoreceptor An image forming device that develops an electrostatic latent image. Background technique [0002] As a developing device for developing an electrostatic latent image on a photoreceptor that is an image carrier, a one-component developing system and a two-component developing system are known. The two-component development method uses a developer composed of toner and magnetic carrier, thereby stabilizing the charge amount for a long period of time and is suitable for extending the life. For example, a developing device of a two-component developing system accommodates a developer including toner and a magnetic carrier, and supplies the developer from a stirring m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/09G03G21/10G03G15/00
CPCG03G13/095G03G15/09G03G15/0808G03G21/0064
Inventor 荣木天
Owner KYOCERA DOCUMENT SOLUTIONS INC
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