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Image forming apparatus and method for conveying recording material

A technology of recording material and conveying direction, applied in the direction of electric recording process applying charge pattern, equipment of electric recording process applying charge pattern, electric recording technique, etc. And other issues

Active Publication Date: 2009-10-28
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, if it is erroneously determined that the sheet is deviated to one side (i.e., one side in the direction perpendicular to the conveyance direction), the throughput is lowered or the sheet conveyance is stopped, resulting in a decrease in printing efficiency
Even when narrow sheets are not conveyed, users sometimes face a decrease in throughput or a halt in image formation

Method used

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  • Image forming apparatus and method for conveying recording material
  • Image forming apparatus and method for conveying recording material
  • Image forming apparatus and method for conveying recording material

Examples

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no. 1 example

[0056] Similar to the first embodiment, when the sub-thermistor 12 detects the temperature rise of the end portion of the heating member, the throughput can be reduced.

[0057] In this embodiment, the sheet width sensor H1 is arranged on the right side of the center reference as viewed in the conveying direction. However, a sheet width sensor arranged on the opposite side of the center reference would provide the same advantages.

[0058] Therefore, this embodiment prevents a drop in throughput or a stoppage of sheet conveyance caused by erroneous detection by the sheet width detection sensor during conveyance of a non-standard-sized sheet.

[0059] In the first and second embodiments described above, if a sheet is conveyed on the side opposite to the sheet width sensor H1 deviated from the center reference, the conveyance position of the sheet is not detected. Therefore, another sheet width sensor is provided on the opposite side from the center reference to the sheet width...

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Abstract

The present invention provides an image forming apparatus including an image forming unit configured to form an image on a sheet, a conveying path along which the sheet is conveyed to the image forming unit, a sensor configured to detect the width of the sheet in a direction perpendicular to a conveying direction, and a control unit configured to determine a conveying state of the sheet in the direction perpendicular to the conveying direction according to an output of the sensor, and configured to control a conveyance interval of the sheet according to the determination result. The control unit sets the conveyance interval according to the width of the specified sheet and the width detectable by the sensor, regardless of the determination result.

Description

technical field [0001] The present invention relates to an image forming apparatus for forming an image on a recording material and a method for conveying the recording material. More specifically, the present invention relates to control of conveyance of recording materials in image forming apparatuses such as copiers or printers. Background technique [0002] An image forming apparatus, such as a copier or a printer, for forming an image on a sheet used as a recording material includes a controller for controlling the operation of the apparatus. The controller may know the size of the sheet from sheet size information specified by a user through a computer connected to the printer or from information obtained from a sheet size detection sensor provided in the apparatus. The size of the sheet in the direction perpendicular to the conveying direction (hereinafter also referred to as "sheet width") and the conveying position are detected by sensors provided in the sheet conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00
CPCB65H2511/12B65H5/34B65H2801/06B65H2511/22B65H2301/44522B65H2220/01B65H2220/02
Inventor 北條雄太
Owner CANON KK
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