Back to results
US 2009/0267288 A1Published application
Sheet feeding apparatus, sheet feeding method and control program
AssigneeCanon Kabushiki Kaisha
InventorsICHIRO SASAKI, KEIZO ISEMURA, MITSUHIKO SATO, NAOHISA NAGATA, AKINOBU NISHIKATA, HIDENORI SUNADA
Life of this patent
Estimating the term…
Abstract
A sheet feeding apparatus provided with a fan for blowing air against sheets stacked on a sheet tray, a position detecting sensor for detecting the position of the sheets floated up by the fan, and a tray lifting and lowering mechanism for lifting and lowering the sheet tray. The tray lifting and lowering mechanism is controlled on the basis of a result of detection by the position detecting sensor.
Claims11
1-13. (canceled)
A sheet feeding apparatus, comprising:
- a tray on which sheets are stacked;
- an air discharging portion configured to blow air against the sheets on said tray to float up a sheet;
- a sheet feeder configured to feed the sheet floated up by said air discharging portion;
- a tray lifting and lowering portion configured to lift and lower said tray in a horizontal attitude;
- a position detecting unit configured to detect a position of an uppermost sheet which is being floated up by said air discharging portion;
- and
- a controlling portion adapted to let said tray lifting and lowering portion lower said tray when the uppermost sheet being floated up is above an upper limit of a predetermined range, and let said tray lifting and lowering portion lift said tray when the uppermost sheet being floated up is below a lower limit of said predetermined range, so that a floating position of the uppermost sheet falls within said predetermined range based on a detection result of said position detecting unit.
4 more elements
An image forming apparatus, comprising:
- a tray on which sheets are stacked;
- an air discharging portion configured to blow air against the sheets on said tray to float up a sheet;
- a sheet feeder configured to feed the sheet floated up by said air discharging portion;
- an image forming portion configured to form an image on the sheet fed by said sheet feeder;
- a tray lifting and lowering portion configured to lift and lower said tray in a horizontal attitude;
- a position detecting unit configured to detect a position of an uppermost sheet which is being floated up by said air discharging portion;
- and
- a controlling portion adapted to let said tray lifting and lowering portion lower said tray when the uppermost sheet being floated up is above an upper limit of a predetermined range, and let said tray lifting and lowering portion lift said tray when the uppermost sheet being floated up is below a lower limit of said predetermined range, so that a floating position of the uppermost sheet falls within said predetermined range based on a detection result of said position detecting unit.
5 more elements
Dependencies are inferred from the claim text.