Sheet feeding apparatus and image forming apparatus

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

2007-01-18

2008-12-09

Joerger, Kaitlin S (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S096000

Reexamination Certificate

active

07461839

ABSTRACT:
A sheet feeding apparatus for blowing air against sheets in feeding the sheets. The apparatus includes a suction duct disposed over a sheet stacking unit and having a suction opening facing the sheet stacking unit, a negative pressure generating unit for generating negative pressure in the suction duct, a sheet conveyance unit suctioning the sheet thereto with the negative pressure so as to convey the sheet, a communicating opening adapted to communicate with an exterior and provided in the suction duct. The communicating opening is closed by a cover according to a magnitude of a negative pressure in the suction duct. When a detection unit detects that the communicating opening has been closed with the cover, a control unit drives the sheet conveyance unit.

REFERENCES:
patent: 4291974 (1981-09-01), Silverberg
patent: 5645274 (1997-07-01), Ubayashi et al.
patent: 5893554 (1999-04-01), Okahashi et al.
patent: 6254081 (2001-07-01), Rasmussen et al.
patent: 06-001467 (1994-01-01), None

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