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Image forming apparatus

An image and monochrome image technology, applied in the field of image forming devices, to achieve the effect of preventing misregistration

Inactive Publication Date: 2009-10-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this control is not intended to reduce the misregistration of the rotational phase at start-up

Method used

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Examples

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Embodiment Construction

[0029] In the present invention, a monochrome image is formed by using one or more color components and also by using fewer color components than for a full-color image. When a monochrome image is formed with a plurality of color components, the color phase of the image is substantially uniform in each area.

[0030] The first and second driving sections drive the photoconductor. Specific examples thereof include, for example, a mechanism for transmitting drive from a drive source by means of a DC motor, a gear, a timing belt, or the like used as the drive source.

[0031] The first driving section controls the start, stop and driving speed of the photoconductor driven by the first driving section. The second drive section controls the start, stop and drive speed of the photoconductor driven by the second drive section. Specific examples thereof include, for example, a control circuit of a motor and a CPU that issues instructions to the control circuit.

[0032] The image f...

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PUM

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Abstract

The invention relates to an image forming apparatus, which includes: a first and a second photoconductor groups constituted of one or more photoconductors respectively, a first and a second drive control sections for controlling the drive of the first and the second photoconductor groups respectively to rotate the photoconductors thereof, wherein the rotational phases of the first photoconductor group and the second photoconductor group are adjusted to be matched therebetween, and the first and the second drive control sections control so that the first and the second photoconductor groups are driven simultaneously with an equal target speed during a formation of a image, wherein an initial drive speed is lower than a predetermined speed for image-formation, and after the first and the second photoconductor groups reaches the initial drive speed, the target speed is changed from the initial drive speed to the speed for image-formation.

Description

technical field [0001] The present invention relates to an image forming apparatus having a plurality of photoconductors. Background technique [0002] There is known an image forming apparatus, a so-called tandem type image forming apparatus, in which a plurality of toner images are formed by an electrophotographic process by means of a plurality of photoconductors, each photoconductors correspond to each toner image, and these toner images are superimposed. In a tandem image forming apparatus forming a full-color image, corresponding color components such as yellow (Y), magenta (M), cyan (C) and black ( The toner images of K) are formed by means of different photoconductors, and each toner image is superimposed (for example, see Japanese Unexamined Patent Application No. 11-91205). [0003] In the tandem image forming apparatus, it is necessary to drive a plurality of photoconductors, each corresponding to each toner image, and an image forming section for forming the to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/01G03G15/00
CPCG03G15/5008G03G15/0105G03G2215/0132
Inventor 矶见谦一伊藤哲嗣赤松浩嗣山口哲也望月秀一
Owner SHARP KK
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