JP2007024996A5

JP2007024996A5 -

Info

Publication number: JP2007024996A5
Application number: JP2005203634A
Authority: JP
Filing date: 2005-07-12
Publication date: 2008-02-21

Claims

An intermediate transfer member for transferring the developed image on the image carrier, and a rotatable intermediate transfer member having a mark indicating a reference position of the intermediate transfer member;
Detecting means for detecting the mark on the intermediate transfer member;
First control means for controlling image formation timing based on the detection timing of the mark by the detection means;
A time measuring means for measuring a predetermined time from a timing when the rotation state of the intermediate transfer member is stable;
Second control means for controlling the image formation timing based on the timing of timing up of the time by the time measuring means;
Switching means for switching between control of image formation timing by the first control means and control of image formation timing by the second control means;
An image forming apparatus comprising:

The image forming apparatus is capable of forming a color image when the control is switched between the control by the first control unit and the control by the second control unit by the switching unit. The image forming apparatus according to claim 1, wherein:

The image forming apparatus according to claim 1, wherein the switching unit automatically performs the switching when the detection unit cannot detect the mark , or performs the switching based on a designated input. .

The time measuring means is activated at a predetermined interval, and the second control means controls the image formation timing related to the images of the respective colors on the plurality of surfaces based on the timing of the time counting up by the time measuring means. The image forming apparatus according to claim 2.

A plurality of the time measuring means for measuring time different from each other, wherein the plurality of time measuring means are activated at the same time, and the second control means includes a plurality of times based on the timing of the time counting up by the plurality of time measuring means; The image forming apparatus according to claim 2, wherein the image forming timing of each color image on the surface is controlled.

A control method for an image forming apparatus having an intermediate transfer member for transferring a developed image on an image carrier and having a rotatable intermediate transfer member having a mark indicating a reference position of the intermediate transfer member,
A detection step of detecting the mark on the intermediate transfer member;
A first control step of controlling image formation timing based on the detection timing of the mark by the detection step;
A time measuring step for measuring a predetermined time from the timing when the rotation state of the intermediate transfer member is stable;
A second control step of controlling the image formation timing based on the timing of timing up of the time by the timing step;
A switching step of switching between image formation timing control by the first control step and image formation timing control by the second control step;
A control method for an image forming apparatus, comprising :

The image forming apparatus is capable of forming a color image when the control is switched between the control by the first control process and the control by the second control process by the switching process. The method of controlling an image forming apparatus according to claim 6.

The image forming apparatus according to claim 6, wherein the switching step performs the switching automatically when the detection step cannot detect the mark , or performs the switching based on a designated input. control method of.