Original feeding apparatus having a plurality of sensors
AssigneeCanon Kabushiki Kaisha
InventorTakayuki Fujii
Life of this patent
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Abstract
An original feeding apparatus has a sensor for detecting an original by a light emitting element and a light receiving element. A first detector for detecting presence/absence of a sheet, and a second detector capable of being electrically switched between a detection possible condition that the presence/absence of the sheet can be detected and a detection impossible condition that the presence/absence of the sheet cannot be detected are provided and the second sensor is switched to the detection impossible condition when presence of the original is detected by the first detector.
Claims13
A sheet feeding apparatus comprising:
- a first detector capable of being electrically switched between a detection possible condition that the presence/absence of a sheet can be detected and a detection impossible condition that the presence/absence of a sheet cannot be detected;
- a second detector capable of being electrically switched between the detection possible condition and the detection impossible condition;
- and
- a controller for controlling said first and second detectors to be in the detection possible condition and for controlling said first detector to be in the detection possible condition and the second detector to be in the detection impossible condition.
An original feeding apparatus comprising:
- a first detector capable of being electrically switched between a detection possible condition that the presence/absence of an original can be detected and a detection impossible condition that the presence/absence of an original cannot be detected;
- a second detector capable of being electrically switched between the detection possible condition and the detection impossible condition;
- and
- a controller for controlling said first and second detectors to be in the detection possible condition and for controlling said first detector to be in the detection possible condition and the second detector to be in the detection impossible condition.
Dependencies are inferred from the claim text.