JP2009139591A5

JP2009139591A5 -

Info

Publication number: JP2009139591A5
Application number: JP2007315206A
Authority: JP
Filing date: 2007-12-05
Publication date: 2011-01-27
Anticipated expiration: 2027-12-05

Claims

An image forming apparatus that adjusts a conveyance speed of a recording material using an adjustment pattern of toner formed on an intermediate transfer member in order to adjust a formation position of a toner image on the recording material,
Pattern forming means for forming the adjustment pattern on the intermediate transfer member;
Using a first sensor for detecting the scratches on the surface of the intermediate transfer member formed on Ru adjustment pattern and the intermediate transfer member, detecting the position and width of the flaw in the bearing surface of the adjustment pattern on the intermediate transfer body and Ken knowledge means you,
And it detected the SL you store the position and the width of the intermediate transfer body憶means of the flaw,
The position and width of the flaw of the intermediate transfer body which is stored in the storage means, and a position and width of the adjustment patterns formed by the pattern forming means, whether said adjustment pattern and the wound overlap and determining-size constant means,
When it is determined that the adjustment pattern and the scratch do not overlap, the conveyance speed of the recording material is adjusted in accordance with the first transfer timing for transferring the toner image to the recording material, which is obtained from the timing at which the adjustment pattern is detected. and, when it is determined that pre-Symbol adjustment pattern and the scratches and overlap, instead of the first transfer timing, and adjusting means for adjusting the conveying speed of the recording material in accordance with the second transfer timing determined in advance An image forming apparatus comprising:

An adjustment signal output means for outputting an adjustment signal for obtaining the second transfer timing after a predetermined time has elapsed after the start signal for starting the formation of the toner image is notified to the pattern forming means. Further comprising
Said adjusting means, when said adjustment pattern by prior SL-size constant means and said flaw is determined to become heavy, the transport of the recording material in accordance with the second transfer timing derived from the adjustment signal has been output timing The image forming apparatus according to claim 1, wherein the speed is adjusted.

A second sensor for detecting a mark formed in advance on the intermediate transfer member;
Before dangerous intellectual means,
A time measuring means for measuring a time from when the mark is detected by the second sensor;
The time measured by the time measuring means at the time when a signal when the scratch is detected from the first sensor is output is detected as information indicating the position of the scratch, and after the first sensor detects the scratch, The image forming apparatus according to claim 2, wherein a time measured by the timing unit until output of a signal when a flaw is detected is detected as information indicating a width of the flaw.

Before dangerous intellectual means,
The positions of all the detected flaws so as to eliminate the difference between the relative position on the intermediate transfer member where the start signal is output and the position on the intermediate transfer member where the first sensor detects flaws. The image forming apparatus according to claim 3, further comprising a correcting unit that corrects the information indicating the above.

Using the position and width of the wounds that before crisis憶means stored intermediate transfer member, further comprising a flaw signal output means for outputting a flaw signal representing the position of該傷,
Before SL-size constant means, when the start signal is notified to the pattern forming means,
When the scratch signal is output, it is determined that the adjustment pattern and the scratch overlap,
The image forming apparatus according to claim 4, wherein when the scratch signal is not output, it is determined that the adjustment pattern and the scratch do not overlap.

Before dangerous intellectual means,
Judgment means for judging whether or not there is information for detecting a flaw formed across the mark as two flaws in the detected flaw position and width information;
And correction means for correcting the information on the position and width of the two scratches as information on one scratch when there is information that detects the scratch formed across the mark as two scratches. The image forming apparatus according to claim 3, wherein the image forming apparatus is an image forming apparatus.

The determination means includes
Among the detected flaw information, flaw information whose information indicating the position is 0, and a sum of a value indicating the position and a value indicating the width is a value corresponding to the circumference of the intermediate transfer member. 7. The image forming apparatus according to claim 6, wherein, when there is information on a flaw that exists, it is determined that there is information that detects a flaw formed across the mark as two flaws. .

A control method for an image forming apparatus, which adjusts the conveyance speed of a recording material using an adjustment pattern of toner formed on an intermediate transfer member in order to adjust the formation position of a toner image on the recording material,
Forming the adjustment pattern on the intermediate transfer member by a pattern forming unit;
Using a first sensor for detecting the scratches on the surface of the intermediate transfer member formed on Ru adjustment pattern and the intermediate transfer member, detects the position and width of the flaw in the bearing surface of the adjustment pattern on the intermediate transfer body Detecting by intelligent means;
Storing a test known position and width of the intermediate transfer body of the wound to memorize means,
The position and width of the flaw of the intermediate transfer body which is stored in the storage means, and a position and width of the adjustment patterns formed by the pattern forming means, whether said adjustment pattern and the wound overlap determining by determine a constant means,
When it is determined that the adjustment pattern and the scratch do not overlap, the conveyance speed of the recording material is adjusted in accordance with the first transfer timing for transferring the toner image to the recording material, which is obtained from the timing at which the adjustment pattern is detected. and, when it is determined that before and SL adjustment pattern and the wound overlap, instead of the first transfer timing is adjusted by adjusting means the transport speed of the recording material in accordance with the second transfer timing determined in advance A control method for the image forming apparatus.