Sheet feeding device and image forming apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8079585
APP PUB NO 20110031679A1
SERIAL NO

12891958

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An upper limit detection sensor detects that a top face position of a sheet stack on a tray reaches an upper limit position which enables feeding of sheets one by one by a sheet feeding portion and a lower limit detection sensor detects that the top face position of the sheet stack on the tray reaches a lower limit position which enable feeding of sheets one by one. When the sheet stack is loosened by blowing air against a side face of the sheet stack on the tray with an air spouting nozzle provided on an air loosening device, if a sheet floated by air from the air loosening device exceeds an upper limit position of a feeding enabled range, the lowering amount of the tray is controlled so that at least a sheet next to the sheet to be fed is not lower than a lower end position of the air spouting port of the air loosening device.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHA30-2 SHIMOMARUKO 3-CHOME OHTA-KU TOKYO 146-8501

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Takashi Kashiwa, JP 383 4821

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  • 1 Citation Count
  • B65H Class
  • 7.07 % this patent is cited more than
  • 14 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges666401584216421111101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 8081 - 9091 - 100100 +050100150200250300350400450500550600650700

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