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Transfer device and image forming apparatus including same

A transfer printing component and an intermediate transfer printing technology, which are applied in the fields of electrical recording technology using charge graphics, equipment for using electrical recording technology using charge graphics, and electrical recording, and can solve problems such as black image stripes

Active Publication Date: 2014-06-04
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, since monochrome images such as black are formed after the pressing force of the primary transfer rollers of each color is set to be low in order to solve the color misalignment of color images, when the primary transfer rollers of other colors leave the photosensitive drum , there is a problem that there will be obvious stripes on the black image

Method used

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  • Transfer device and image forming apparatus including same
  • Transfer device and image forming apparatus including same
  • Transfer device and image forming apparatus including same

Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, the image forming apparatus according to the embodiment of the present invention will be described in detail based on the drawings. In this embodiment, a tandem color printer is taken as an example of an image forming apparatus. The image forming apparatus may be, for example, a copier, a facsimile apparatus, or a multifunction machine of these.

[0024] figure 1 is a cross-sectional view showing the internal structure of the image forming apparatus 10 . figure 2 yes figure 1 A perspective view of the intermediate transfer unit 14 is shown. image 3 It is a perspective view showing the internal structure of the intermediate transfer unit 14 .

[0025] The image forming apparatus 10 includes an apparatus main body 11 . The device main body 11 has a box-like box structure. A paper feeding unit 12 , an image forming unit 13 , an intermediate transfer unit 14 (transfer device), a toner replenishing unit 15 , and a fixing unit 16 are disposed in the appar...

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PUM

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Abstract

The invention provides a transfer device and an image forming apparatus including the same. The transfer device includes a plurality of transfer members and a switch section. The switch section, in a first state, causes the transfer members to be pressed against a plurality of image bearing members. The switch section, in a second state, causes a transfer member opposed to a first image bearing member to be pressed against the first image bearing member, and causes a transfer member opposed to a second image bearing member to be separated from the second image bearing member. In the first state, toner images of different colors are transferred from the image bearing members to an intermediate transfer belt and superimposed together. In the second state, a single-color toner image is transferred from the first image bearing member to the intermediate transfer belt. The switch section changes a pressing force of the transfer member to the first image bearing member between the first and second states.

Description

technical field [0001] The present invention relates to a transfer device for transferring a toner image to a sheet, and an image forming apparatus including the transfer device. Background technique [0002] As a technique for transferring a toner image to a sheet, a transfer device using an intermediate transfer belt is known. The intermediate transfer belt is stretched over a driving roller and a driven roller with tension applied thereto. And, the intermediate transfer belt is driven and rotated. The intermediate transfer belt is in contact with the plurality of photosensitive drums. Each of the plurality of photosensitive drums carries a toner image. As a result, a plurality of toner images are superimposedly transferred onto the surface of the intermediate transfer belt. [0003] A plurality of primary transfer rollers facing the plurality of photosensitive drums are disposed inside the intermediate transfer belt. The primary transfer nip is formed by pressing the...

Claims

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Application Information

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IPC IPC(8): G03G15/16G03G15/01
CPCG03G15/161G03G15/0136G03G2215/0193
Inventor 上野大二郎福永靖幸
Owner KYOCERA DOCUMENT SOLUTIONS INC
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