Sheet feeding device and image forming apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 20, 2011
Grant Date -
Feb 10, 2011
app pub date -
Sep 28, 2010
filing date -
Oct 13, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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CANON KABUSHIKI KAISHA | 30-2 SHIMOMARUKO 3-CHOME OHTA-KU TOKYO 146-8501 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Fujita, Takashi | Kashiwa, JP | 383 | 4821 |
# of filed Patents : 383 Total Citations : 4821 |
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Patent Citation Ranking
- 1 Citation Count
- B65H Class
- 7.07 % this patent is cited more than
- 14 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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