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Image forming apparatus

An image and equipment technology, applied in the field of color image forming equipment, can solve problems such as reduction

Inactive Publication Date: 2008-01-16
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the image forming apparatus described in H4-284468, at the time of forming an image (in which an exposure unit and an image forming unit for three colors of yellow (Y), magenta (M), and cyan (C) are used), Since image formation needs to be performed three times, the output speed of color images (that is, the number of output sheets / unit time) decreases

Method used

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0029] FIG. 1 shows an example of an image forming apparatus including an optical scanning unit (exposure unit) using an embodiment of the present invention. In the description of this embodiment, an example of the present invention is explained by taking a color printing apparatus as an example. However, as a matter of course, the present invention is applicable to any device (that can output an image), such as a full color copying device, a facsimile device, or a workstation device.

[0030] An image forming apparatus (i.e., a color printing apparatus) 1 includes: an exposure unit 3 that generates image light corresponding to a monochromatic image signal (for example, black, BK) that is often used to form an image; an exposure unit 31 that corresponds to Image light is generated from image signals of corresponding colors of yellow (Y), magenta (M), and cyan (C) other...

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Abstract

The image forming device which is obtained by the embodyment instance using the invention can reduce the time that is needed before outputting the monochrome image often used to form the image, the number of the outputting sheet at unit time in the color picture outputting course processed by the device is equal to that in the monochrome image outputting, besides the device can guarantee the durability of the exposure system which is often used for the outputting of the monochrome image used to form the image is same to the durability of the exposure system which is used for the color images.

Description

technical field [0001] The present invention relates to an image forming apparatus, typified by, for example, an electrophotographic copier and a laser printer, and more particularly, to a color image forming apparatus that can provide a color image based on a subtractive color process. Background technique [0002] A color image forming apparatus that can provide a color image based on a subtractive color process has been used in practice and is widely used. [0003] In Japanese Patent Laid-Open No. 2005-221870 (KOKAI), an image forming apparatus is described, which includes: an exposure unit having an A deflector of image light of each color of cyan (C) and a set of imaging optical systems; and four developing units that develop latent images of corresponding colors. [0004] In Japanese Patent Laid-Open No. 2003-266781 (KOKAI), an image forming apparatus is described in which various colors of black (BK), yellow (Y), magenta (M), and cyan (C) are independently The expos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/01G03G15/00
CPCB41J2/471G02B26/123G02B26/125G03G2215/0404G03G15/011G03G15/326G02B26/127G03G15/0435
Inventor 白石贵志
Owner KK TOSHIBA
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