Sheet feeding apparatus
AssigneeCanon Kabushiki Kaisha
InventorsToshiki Ishida, Wataru Murata
Life of this patent
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Abstract
A sheet feeding apparatus includes a sheet supporting portion, a sheet feeding unit configured to perform a feeding operation, an air separation unit configured to perform a blowing operation, and a control unit configured to execute a sheet feeding control. In the sheet feeding control, in a case where a second number of sheets, separated by the blowing operation but not fed, remains on the sheet supporting portion at an end of a first job, and a number of printing sheets of a second job subsequent to the first job is a third number of sheets that is equal to or less than the second number of sheets, the control unit omits an initial blowing operation and starts the feed operation in the second job.
Claims17
A sheet feeding apparatus comprising:
- a sheet supporting portion configured to support a sheet bundle;
- a sheet feeding unit configured to perform a feeding operation of coming into contact with and feeding an uppermost sheet of the sheet bundle supported on the sheet supporting portion;
- an air separation unit configured to perform a blowing operation of separating a sheet by blowing air to a side surface of the sheet bundle supported on the sheet supporting portion;
- and
- a control unit configured to execute a sheet feeding control of executing the blowing operation by the air separation unit, of stopping the blowing operation, and of executing the feeding operation in a state in which the blowing operation is stopped, the control unit, in the sheet feeding control, being configured to execute the blowing operation each time when a first number of sheets has been fed until feeding the sheet for a number of printing sheets as specified by a job has been completed, and
- wherein, in the sheet feeding control, in a case where a second number of sheets, separated by the blowing operation but not fed, remains on the sheet supporting portion at an end of a first job, and a number of printing sheets of a second job subsequent to the first job is a third number of sheets that is equal to or less than the second number of sheets, the control unit omits an initial blowing operation and starts the feed operation in the second job.
A sheet feeding apparatus comprising:
- a sheet supporting portion configured to support a sheet bundle;
- a sheet feeding unit configured to perform a feeding operation of coming into contact with and feeding an uppermost sheet of the sheet bundle supported on the sheet supporting portion;
- an air separation unit configured to perform a blowing operation of separating a sheet by blowing air to a side surface of the sheet bundle supported on the sheet supporting portion;
- and
- a control unit configured to execute a sheet feeding control of executing the blowing operation by the air separation unit, of stopping the blowing operation, and of executing the feeding operation in a state in which the blowing operation is stopped, the control unit, in the sheet feeding control, being configured to execute the blowing operation each time when a first number of sheets has been fed until feeding of the sheet for a number of printing sheets as specified by a job has been completed, and
- wherein, in the sheet feeding control, in a case where a fourth number of sheets fed after the blowing operation is less than the first number of sheets at an end of a first job, the control unit omits an initial blowing operation and starts the feed operation in a second job subsequent to the first job.
Dependencies are inferred from the claim text.