Sheet feeding device and image forming apparatus

Details Sheet feeding device and image forming apparatus Sheet feeding device and image forming apparatus

2010-09-28

2011-12-20

Joerger, Kaitlin (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S097000, C271S155000

Reexamination Certificate

active

08079585

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.

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