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Image forming apparatus

An image and color image technology, applied in the field of image forming devices, can solve the problems of inaccuracy, inaccurate color registration, uneven color depth and the like

Inactive Publication Date: 2008-08-27
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the above-mentioned tandem color system, there are generally many difficulties in overlapping toner images of various colors (hereinafter referred to as "appropriate" toning"), and there are easy to produce color misregistration and color depth. The problem of unevenness (collectively referred to as "inaccurate color registration" below)

Method used

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Examples

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Embodiment Construction

[0016] Next, a printer as an example of the image forming apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of a printer according to an embodiment of the present invention. As shown in FIG. 1 , in a printer 1 , image forming units 2M, 2C, 2Y, and 2K are arranged side by side for each color of magenta (M), cyan (C), yellow (Y), and black (K). Each of the image forming sections 2M, 2C, 2Y, and 2K is a device for forming (printing) a color image or a black-and-white image on paper, and has a photosensitive drum 3 made of, for example, amorphous silicon, which is rotatable in the direction of the arrow in this figure, and is configured The charging part 4 around the photosensitive drum 3, the exposure part 5, the developing part 6, the cleaning part 7 and the like.

[0017] The charging unit 4 is a device for uniformly charging the surface of the photosensitive drum 3 with a pre...

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Abstract

The image forming apparatus is equipped with: a plurality of developing parts for developing toner images of respective colors; the intermediate transfer belt for superposing and transferring the toner images of the respective colors developed by the developing parts onto a surface of the belt or onto transfer material transported over the belt surface; a first roller (drive roller) for driving the intermediate transfer belt while the intermediate transfer belt is wound around the first roller; and a second roller (driven roller and tension roller), which is driven to be rotated along with the rotation of the intermediate transfer belt driven by the first roller while the intermediate transfer belt is wound around the second roller. When the diameter of an outer peripheral part including the thickness (t) of the intermediate transfer belt at the first roller part is defined as D1, and the outside diameter of the second roller is defined as D2, they satisfy an equality: D2=N*D1 , wherein N=n or 1 / n (n: positive integer).

Description

technical field [0001] The present invention relates to image forming apparatuses such as printers and copiers, and more particularly, to an image forming apparatus that forms a color image by overlapping toners of various colors. Background technique [0002] In recent years, image forming apparatuses such as printers and copiers having a color printing function have become popular. In such color printing, a multi-color toner called YMCK, for example, is superimposed to form a color image. Regarding the formation of such color images, for example, a so-called tandem color system (such as a color printer) having a transfer belt unit and image forming units of various colors arranged side by side along the transfer belt is known. In general, a transfer belt unit has two or more rollers for supporting and driving the transfer belt (hereinafter, the respective rollers constituting these transfer belt units are referred to as "belt constituting rollers"). Belt constituting roll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/16G03G15/00
Inventor 乾洋士江藤拓哉
Owner KYOCERA DOCUMENT SOLUTIONS INC
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