Double-feed detection apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsSeiji Yokoyama, Eiichiro Teshima
Life of this patent
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Abstract
A double-feed detection apparatus includes a sensor configured to detect double feed of transfer materials conveyed along a conveying path, and a control unit configured to execute detection of the transfer material under conveyance plural times with the sensor, and to determine the double feed of the transfer materials based on detection results. The control unit determines a detection timing based on both a distance along the conveying path from the sensor to an image forming unit which forms an image on the transfer material and a length of the transfer material in the feed direction.
Claims16
A double-feed detection apparatus configured to detect transfer materials being conveyed with one overlapping another, the apparatus comprising:
- a conveying path along which a transfer material is conveyed;
- a sensor configured to detect transfer materials being conveyed with one overlapping another along the conveying path;
- and
- a control unit configured to execute detection of a transfer material under conveyance plural times with the sensor, and to determine that transfer materials are conveyed with one overlapping another based on detection results by the sensor,
- wherein the control unit determines a detection timing of the sensor based on both a distance along the conveying path from the sensor to an image forming unit which forms an image on the transfer material and a length of the transfer material in the feed direction.
An image forming apparatus comprising:
- a stacking unit in which a transfer material is stacked;
- a conveying path along which the transfer material supplied from the stacking unit is conveyed;
- a sensor configured to detect transfer materials being conveyed with one overlapping another along the conveying path;
- an image forming unit configured to form an image on the transfer material;
- and
- a control unit configured to execute detection of the transfer material under conveyance plural times with the sensor, and to determine that transfer materials are conveyed with one overlapping another based on detection results,
- wherein the control unit determines a detection timing of the sensor based on both a distance along the conveying path from the sensor to the image forming unit and a length of the transfer material in the feed direction.
Dependencies are inferred from the claim text.