Conveying apparatus
AssigneeCanon Kabushiki Kaisha
InventorShigeto Sakai
Life of this patent
Estimating the term…
Abstract
When continuous-conveying control is executed in a conveying apparatus which can handle various sizes of sheet, a conveying apparatus which can efficiently detect a conveying error by a required minimum conveyed amount or conveying time according to a sheet size is provided. For that purpose, a maximum conveyed amount from start of sheet feeding of the subsequent page to determination to be a sheet-feeding error is set based on a detection result of a rear end portion on a previous page by a PE sensor. The maximum conveyed amount when the rear end portion of the previous page is detected is set smaller than the maximum conveyed amount when not detected.
Claims8
A conveying apparatus for continuously conveying a plurality of sheets for applying predetermined processing to the sheets, comprising:
- a conveying unit configured to feed the sheets loaded on a sheet stocking portion one by one, to convey the sheets along a conveying path, and to discharge the sheets;
- a conveyed amount measuring unit configured to measure a conveyed amount of the sheet by the conveying unit;
- a processing portion installed in the conveying path of the conveying unit and configured to execute the predetermined processing to the conveyed sheet;
- a detecting unit installed at an upstream position from the processing portion in the conveying path and configured to detect a leading end portion and a rear end portion of the sheet;
- and
- a control portion configured to determine a conveying error of the conveying unit and to control the conveying unit based on the conveyed amount measured by the conveyed amount measuring unit and a detection result by the detecting unit,
- wherein if the detecting unit does not detect the leading end of a sheet even after the conveyed amount from start of feeding of said sheet obtained from the conveyed amount measuring unit exceeds a predetermined amount, the control unit determines to be the conveying error and if the detecting unit detects the rear end portion of a sheet for the previous page, the control portion sets the predetermined amount smaller than the amount if the rear end portion is not detected.
Dependencies are inferred from the claim text.