Sheet-supply device

Details Sheet-supply device Sheet-supply device

2006-02-21

2006-02-21

Walsh, Donald P. (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S167000

Reexamination Certificate

active

07000916

ABSTRACT:
A sheet-supply device includes a pair of stopper members provided to a bottom plate of a hopper portion so as to move between a protruding position where upper surfaces of the stopper members protrude from a surface of the bottom plate and a retracted position where upper surfaces of the stopper members retract from the surface of the bottom plate, and a position change mechanism moving the stopper members between the protruding and retracted positions. By changing a timing of ascending the stopper members to the protruding position according to a type of the sheets to be fed, an appropriate resistance is applied to all of the sheets in the hopper portion except a topmost sheet during a sheet feed operation, thereby preventing a multi-feed problem. The stopper members moves up and down several times via the position change mechanism at a time between after the sheet feed operation is completed and before a next sheet feed operation starts, thereby positioning the sheets, which may cause the multi-feed problem, at a predetermined sheet holding position.

REFERENCES:
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patent: A 2001-253580 (2001-09-01), None
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patent: 2001-341876 (2001-12-01), None
patent: A 2001-354330 (2001-12-01), None
patent: 2001-354330 (2001-12-01), None
Asada et al., “Sheet-Supply Device and Printing Device Including the Same”, Jul. 16, 2003.
Asada et al., “Sheet-Supply Device and Printing Device Including the Same”, Attorney Docket No. 116245, Jul. 16, 2003.

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