Sheet transport device capable of preventing multiple feeding

Details Sheet transport device capable of preventing multiple feeding Sheet transport device capable of preventing multiple feeding

1992-06-10

1993-08-03

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Multiple supplies

271122, B65H 344

Patent

active

052322114

ABSTRACT:
A sheet transport device includes a first cassette which holds first conventional thin, wide sheets; a first sheet separator positioned along a first transport path in order to separate the first sheets from one another, and including a first forward roller rotated in the sheet transport direction, a first parallel retard roller rotatable in an opposite direction, and a drive mechanism which transmits the driving force to the first retard roller only when the first forward roller and the first retard roller are out of contact with each other, such that otherwise, the first retard roller moves together with the first forward roller when they are in contact with each other, the first forward roller and first retard roller being held out of contact with each other when a first sheet is placed therebetween; a second cassette which holds the first sheets or second thicker, narrow sheets which does not permit the first forward roller and the first retard roller to contact each other when placed therebetween; and a second sheet separator positioned along a second transport path in order to separate the second sheets from one another, the second sheet separator including a second forward roller which is rotated in the sheet transport direction and a second retard roller which is rotatable in the opposite direction and which is spaced apart from the second forward roller by a distance at least equal to the first thickness during activation of the second sheet separator.

REFERENCES:
patent: 4060232 (1977-11-01), Gibson
patent: 4733310 (1988-03-01), Kapp et al.
patent: 4966358 (1990-10-01), Yokoi et al.
patent: 5065995 (1991-11-01), Iwamoto et al.
patent: 5076563 (1991-12-01), Namba et al.

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