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Image forming apparatus and developing method

An image and developer technology, which is applied in the direction of electric recording process applying charge pattern, equipment and instrument of electric recording process applying charge pattern, etc., can solve the problem of developer cohesion and adhesion.

Inactive Publication Date: 2019-10-08
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the image forming apparatus having the above-mentioned structure, when the developing sleeve is reversely rotated, the developer sometimes coagulates and sticks to the front side of the blade (the front end in the normal rotation direction of the sleeve).

Method used

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  • Image forming apparatus and developing method
  • Image forming apparatus and developing method
  • Image forming apparatus and developing method

Examples

Experimental program
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Effect test

Embodiment Construction

[0017]

[0018] figure 1 It is a diagram showing a schematic configuration of a color image forming apparatus to which a developing device is applied according to an embodiment. Such as figure 1 As shown, inside the main body casing 20 of the image forming apparatus 10 , processing units 30 for yellow (Y), cyan (C), magenta (M), and black (K) are arranged side by side. The processing units of each color have the same structure, and when it is necessary to distinguish each color for these processing units 30 , Y, C, M, and K indicating these colors are attached and shown after the numbers of each part.

[0019] Each of the processing units 30Y, 30C, 30M, and 30K has photoreceptors 60Y, 60Y, 60C, 60M, 60K.

[0020] In each of the process units 30Y, 30C, 30M, and 30K, different color toners of yellow, cyan, magenta, and black are supplied from toner bottles 32Y, 32C, 32M, and 32K arranged above to form Toner images of respective different colors. The toner cartridges 32Y, ...

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Abstract

Embodiments of the present invention provide an image forming apparatus and a developing method. The image forming apparatus includes: a rotatable developing sleeve that conveys a developer including toner and a carrier, and makes the toner adhere to and develop a photoreceptor forming a latent image; The roller is composed of a magnetic roller with a plurality of magnetic poles fixed in the developing sleeve arranged on the periphery; the sleeve drive motor controls the rotation of the developing sleeve to make it rotate forward or reversely; the limiting member is connected with the developing sleeve The outer circumference is separated by a specified distance to limit the carrier and toner delivered to the developing sleeve to a specified thickness; the motor forward and reverse rotation control part develops the latent image formed on the photoreceptor through the toner and fixes it on the medium At the end of the image forming task, the sleeve drive motor is rotated, and the developing sleeve is rotated in the opposite direction to the image forming time for the reverse rotation setting time, and in the same direction as the image forming time, the forward rotation ratio is reverse rotation setting time Short forward rotation set times.

Description

technical field [0001] Embodiments of the present invention relate to an image forming apparatus and a developing method that perform development using a two-component developer having a toner and a carrier. Background technique [0002] In an image forming device (Multi-Functional Peripheral, Multi-Functional Digital All-in-One) of the two-component development electrophotographic method, a visible image obtained by developing a latent image formed on a photosensitive drum as an image carrier with toner Transfer to the medium (paper or resin sheet). In general, a developing device using a two-component developer such as a toner and a carrier (hereinafter sometimes simply referred to as a developer) forms a developer layer on a developing sleeve with a built-in fixed magnet, and when the developing sleeve rotates, The toner is attached to the electrostatic latent image for development. [0003] The thickness of the developer conveyed by the rotation of the developing sleev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/09
CPCG03G15/0806G03G15/0812G03G15/0921G03G15/095G03G15/0935G03G15/081
Inventor 大西庆
Owner KK TOSHIBA
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