Multiple sheet sensor and deflector

Details Multiple sheet sensor and deflector Multiple sheet sensor and deflector

1979-07-18

1981-03-17

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

271272, 271302, B65H 712, B65H 506

Patent

active

042562996

ABSTRACT:
A device for sensing the condition of multiple sheets during a feed of paper employing a rotatable drive roll and a rotatable backup roll eccentrically and pivotally mounted with respect to the drive roll. The device utilizes the frictional force that a sheet of paper exerts on the backup roll, as paper is driven by the drive roll through the nip which exists between the drive roll and backup roll, to pivot the backup roll around the drive roll until the backup roll reaches a position where the frictional force of the paper against the backup roll is no longer able to push the backup roll. This position is proportional to the thickness of the paper being fed. The presence of multiple sheets of paper can be detected by an ulterior position of the backup roll due to the increased thickness of the multiple sheets.

REFERENCES:
patent: 2278518 (1942-04-01), Kenny et al.
patent: 2337064 (1943-12-01), Peters
patent: 2670954 (1954-03-01), Bach
patent: 2890884 (1959-06-01), Mestre
patent: 3185473 (1965-05-01), Miaskoff et al.
patent: 3202421 (1965-08-01), Ganz
patent: 3266799 (1966-08-01), Ingalls
patent: 4008891 (1977-02-01), Buys

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