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US 2010/0134552 A1Published application
Printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYoshiaki Suzuki, Kazuhisa Kawakami, Kenji Shigeno, Noriyuki Aoki, Yuji Kanome, Kosuke Yamamoto, Masakazu Tsukuda, Haruo Uchida, Hiroyuki Saito
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Abstract
Provided is a printing apparatus including a sensor unit for measuring a moving state of a sheet by optically detecting a surface of the sheet conveyed by a conveying unit. The sensor unit measures and compares the moving states of the sheet at a first measurement position and a second measurement position which are distinct from each other in a main scanning direction, to thereby obtain information on a skew state of a skew component of the moving sheet.
Claims15
A printing apparatus, comprising:
- a conveying unit for moving a sheet in a first direction;
- a printing unit for performing printing onto the sheet;
- a sensor unit which is arranged to detect a surface of the sheet conveyed by the conveying unit, for measuring a moving state of the sheet;
- and
- a control unit,
- wherein the control unit is arranged to obtain information on the skew state of the moving sheet based on results of measurement regarding the moving state of the sheet, the sensor unit being arranged to perform the measurement at a first measurement position and a second measurement position which are distinct from each other in a second direction intersecting the first direction.
3 more elements
Dependencies are inferred from the claim text.