Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorEikou Mori
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Abstract
An image forming apparatus includes an image forming unit to form an image on a sheet, a conveyance unit to convey the sheet having the image formed thereon to a conveyance path and a reading unit to read a test image of a sheet conveyed to the conveyance path. In addition, a controller determines an adjustment value for adjusting a geometric characteristic of an image to be formed by the image forming unit based on a reading result of the reading unit, controls the image forming unit to form the test image, controls the reading unit to read the sheet having the test image formed thereon, and determines an adjustment value for adjusting a geometric characteristic of an image to be formed by the image forming unit based on a reading result of the reading unit.
Claims20
An image forming apparatus comprising:
- an image forming unit configured to form an image on a sheet;
- a conveyance unit configured to convey the sheet having the image formed thereon to a conveyance path;
- a reading unit configured to read a test image of a sheet conveyed to the conveyance path;
- and
- a controller configured to:
- determine an adjustment value for adjusting a geometric characteristic of an image to be formed by the image forming unit based on a reading result of the reading unit;
- control the image forming unit to form the test image;
- control the reading unit to read the sheet having the test image formed thereon;
- determine an adjustment value for adjusting a geometric characteristic of an image to be formed by the image forming unit based on a reading result of the reading unit;
- control the geometric characteristic of the image formed by the image forming unit based on the adjustment value,
- wherein the controller is also configured to:
- determine abnormal data from the reading result of the reading unit, and
- determine the adjustment value based on a specified number of the reading results except for the reading result determined to be the abnormal data.
An image forming apparatus comprising:
- an image forming unit configured to form an image and a test image on a sheet, the test image including a position detection image;
- a conveyance unit configured to convey the sheet having the image and the test image formed thereon by the image forming unit;
- a reading unit configured to read the test image on the sheet downstream, in the conveyance direction in which the conveyance unit conveys the sheet, of the image forming unit;
- a controller configured to:
- acquire reading results of the test images formed by the image forming unit on a plurality of sheets, with the reading results being output from the reading unit;
- determine a sheet having the test image positioned within a predetermined range based on the reading results;
- and
- generate an adjustment condition for adjusting a geometric characteristic of an image to be formed by the image forming unit based on reading results of a first number of sheets having the test images positioned within the predetermined range,
- wherein the image forming unit controls the geometric characteristic of the image formed on a sheet following the plurality of sheets based on the adjustment condition.
Dependencies are inferred from the claim text.