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Color image forming apparatus and method of electrophotographic type

A color image and toner image technology, applied in the field of color image forming equipment, can solve the problems of not being able to set the actual life, dependence, and noise generation

Inactive Publication Date: 2003-07-02
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the printer according to the prior art, since the full-color mode and the monochrome mode are allowed to appear mixedly during continuous printing, and assume the worst case to control the cleaning time, it is necessary for the operator to To wait for the worst-case purge time until the next print, even when printing in monochrome
In addition, for printers, the actual lifetime taking into account the actual application conditions cannot be set; and when selecting parts, the desired lifetime must be additionally set
In addition, depending on the cleaning method, noise is generated; even during what might otherwise be a short period of printing in monochrome mode, noise is generated during a part of the long cleaning time equivalent to the time of printing in full-color mode

Method used

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  • Color image forming apparatus and method of electrophotographic type
  • Color image forming apparatus and method of electrophotographic type
  • Color image forming apparatus and method of electrophotographic type

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no. 2 example

[0059] Refer below Figure 6 and 7 , an image forming apparatus according to a second embodiment of the present invention is described.

[0060] The image forming apparatus according to the first embodiment belongs to a type that, when the full-color mode and the monochrome mode do not appear mixedly during continuous printing, the amount of cleaning is selected from some fixed values; while the second embodiment is different In the first embodiment, it is of a type that uses a variable value as the cleaning time when the full-color mode and the monochrome mode mixedly occur during continuous printing. The basic structure of the image forming apparatus according to the second embodiment of the present invention is the same as that of the first embodiment described with reference to FIGS. 1 to 3 and need not be described.

[0061] Specifically, in Figure 6In , a counter N is used to add the weighted data to the color mode. When the color mode is the full-color mode, the co...

no. 3 example

[0064] Refer below Figure 8 and 9 , an image forming apparatus according to a third embodiment of the present invention is described.

[0065] The second embodiment described above is a type in which when the full-color mode and the monochrome mode appear mixedly during continuous printing, the full-color mode and the monochrome mode are weighted, the purge time is determined based on the count value thereof, and at Perform cleaning after continuous printing. And the third embodiment is different from the second embodiment in that: when the value added during continuous printing exceeds a certain predetermined value, it is judged that the toner remaining on the intermediate transfer member 9 has accumulated to the point that it will affect So much for the next image that the continuous printing is interrupted, a cleaning process is performed. The structure of the image forming apparatus according to the third embodiment of the present invention is the same as that of the f...

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Abstract

This invention relates to the protection of an image bearing member by the cleaning of a color image forming apparatus for forming images in the monochromatic mode and the full color mode on the image bearing member by an electrophotographic system, and simultaneously with the protection, any excess operating time of cleaning means for removing any toner remaining on the image bearing member is eliminated to thereby enable the image forming speed to be improved.

Description

technical field [0001] The present invention relates to a color image forming apparatus and method, and more particularly to an electrophotographic color image forming apparatus and method used as a copying apparatus or a printer. technical background [0002] Up to now, a color image forming apparatus having an intermediate transfer member has not yet formulated a method for variably controlling the cleaning time of the intermediate transfer member according to the image forming conditions, but only assumes its worst case and determines the cleaning time accordingly, and determines accordingly Go for cleaning. In particular, in printers that allow some color modes to appear mixedly, that is, in the case of mixedly appearing full-color mode printing and monochrome mode printing when continuous printing is performed, the color conditions commanded by a host computer for controlling the printer is uncertain. Therefore, in terms of the amount of cleaning of the intermediate t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/01G03G15/16G03G21/00G03G21/10
CPCG03G21/0005G03G15/161G03G2215/0174G03G21/00
Inventor 篠原勇人
Owner CANON KK
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