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image forming device

An image and developing device technology, applied in the direction of electrical recording technology using charge graphics, electrical recording technology using charge graphics, equipment using electrical recording technology using charge graphics, etc., to achieve the effect of suppressing bad images

Inactive Publication Date: 2016-04-20
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

The present invention provides an image forming apparatus that uses a developer including toner and a magnetic carrier, and only the toner is carried on a developing roller to develop an electrostatic latent image on a photoreceptor. The image forming apparatus of the present invention includes a control unit that controls the rotational drives of the magnet roller and the developing roller. The control unit can perform a toner recovery mode in which the magnet roller and the developing roller are intermittently rotated in a direction opposite to that during image formation, and then the magnet roller is rotated in the non-image forming state. Rotate in the positive direction, then rotate the magnetic roller in the reverse direction. According to the present invention, in an image forming apparatus that develops an electrostatic latent image on an image carrier, toner that is not supplied to the image carrier but floats around the developing roller can be recovered.

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 Patents(China)
IPC IPC(8): G03G15/09G03G21/10G03G15/00
CPCG03G15/09G03G13/095G03G15/0808G03G21/0064
Inventor 荣木天
Owner KYOCERA DOCUMENT SOLUTIONS INC