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Colour image forming apparatus

A color image and image technology, applied in the field of color image forming devices, can solve the problems of undesirable counter source, difficulty in continuous image formation, difficulty in increasing color image speed, etc.

Active Publication Date: 2009-04-08
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this function, the counter source cannot be expected as a reference
Therefore, if the image formation size is reduced on the front and back sides of the paper, continuous image formation (smooth linear speed switching operation) on the front and back sides will be very difficult
This makes it difficult to increase the speed of color image formation similarly to the case in the aforementioned (i)

Method used

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Embodiment Construction

[0030] A color image forming apparatus as an embodiment of the present invention will be described below with reference to the drawings.

[0031] figure 1 is a block diagram showing a configuration example of the color copier 100 as an embodiment of the present invention. figure 1 The illustrated color copier 100 is merely an example of a color image forming apparatus having a function of forming color images on both sides of predetermined paper. The color image forming apparatus can be applied to a tandem type color printer, a facsimile machine, or a compound machine thereof, in addition to a color copier.

[0032] The color copier 100 includes a copier main body 101 and an image reading device 102 . On top of the copier main body 101 are mounted an automatic document feeding device 201 and a document image scanning / exposure device 202 . A document 30 placed on a document platen of the automatic document feeder 201 is fed by a transport section (not shown). Images on one ...

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PUM

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Abstract

A tandem type color image forming apparatus, which can continuously form color images each containing two or more colors, including: a signal creating section having, for each color, two or more image area setting counters for generating an image valid area signal to set a starting position and a width of an image formation area in a subscanning direction; and a control section for executing color image formation control on a predetermined face of paper, based on an image top signal (VTOP) for controlling writing of an image on an image carrier and the image valid area signal (MST-IDX) for each color, wherein the control section sets each of the outputs of the image area setting counters independently according to a preset image formation mode, and selects and controls one of the image area setting counters for each image formation of each color.

Description

[0001] This application is based on Japanese Patent Application No. 2005-043130 filed in Japan Patent Office on February 18, 2005. technical field [0002] The present invention relates to a color image forming apparatus, especially applied to a tandem type color printer, a copier, or a combination thereof equipped with an intermediate transfer belt and a plurality of photoconductor drums. Background technique [0003] In recent years, tandem type color printers and copiers and combinations thereof have come into daily use. This type of image forming apparatus has an exposure (exposure) section, a developing (development) device, a photoconductor drum, an intermediate transfer belt, and a Fixing device for each color. [0004] For example, in the Y color exposure section, beam scanning is applied by a polygonal prism according to color image information, and an electrostatic latent image is formed on the photoconductor drum. In the developing device, a Y color toner member...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G21/14G03G21/02
CPCG03G2215/0119G03G15/238G03G15/0178G03G15/0194
Inventor 高木幸一
Owner KONICA MINOLTA BUSINESS TECH INC
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