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US 9,802,778 B2Granted
Image forming apparatus for forming image on sheet
AssigneeCanon Kabushiki Kaisha
InventorsKen-ichiro Isobe, Michio Sugano
Life of this patent
Estimating the term…
Abstract
An image forming apparatus may comprise the following elements. A stacking unit in which a sheet is stacked. A conveyance unit conveys the sheet. A time-counting unit counts a conveyance time from when the conveyance unit starts to convey the sheet until the sheet arrives at a predetermined position on a conveyance path. A determination unit determines that over stacking has occurred, if the conveyance time of the sheet exceeds a first over stacking threshold value.
Claims40
An image forming apparatus comprising:
- a stacking unit in which a sheet is stacked;
- a conveyance unit configured to convey the sheet stacked in the stacking unit;
- a time-counting unit configured to count a conveyance time from when the conveyance unit starts to convey the sheet until the sheet arrives at a predetermined position on a conveyance path;
- and
- a determination unit configured to determine that over stacking in the stacking unit has occurred, upon the conveyance time of the sheet exceeding a first over stacking threshold value.
2 more elements
An image forming apparatus comprising:
- a stacking unit in which a sheet is stacked;
- a conveyance unit for conveying the sheet stacked in the stacking unit;
- a time-counting unit configured to count a conveyance time from when the conveyance unit starts to convey the sheet until the sheet arrives at a predetermined position on a conveyance path;
- an output unit configured to output information regarding over stacking in the stacking unit;
- and
- a control unit configured to cause the output unit to output the information regarding over stacking in the stacking unit and causes the conveyance unit to continue conveyance of the sheet in a case that the conveyance time of the sheet exceeds the first threshold time, and stops image formation and discharge the sheet or stops conveyance of the sheet in a case that the conveyance time of the sheet exceeds a second threshold time that is longer than the first threshold time.
3 more elements
Dependencies are inferred from the claim text.