Sheet feeding or delivering – Feeding – Separators
Patent
1973-12-20
1976-01-27
Blunk, Evon C.
Sheet feeding or delivering
Feeding
Separators
271166, B65H 304
Patent
active
039348695
ABSTRACT:
A sheet feeding device adapted to separate a single sheet from a stack of sheets and forward the separated sheet away from the stack for subsequent processing. The apparatus includes a feed belt mounted for movement on at least two stationary rolls and a movable roll, the section of the belt between the two stationary rolls being adapted for frictional engagement with retard means forming a sheet feed nip therebetween. A sheet sensor adjacent the retard means and the feed belt is employed to displace the movable roll and the portion of the feed belt mounted thereon into engagement with the sheet stack to increase the feed belt "foot print" when the absence of a sheet is sensed during a feed cycle to increase the feed force on the sheet. The feed mechanism is adapted to operate on the bottom sheet of a sheet stack which is subjected to a flow of pressurized air against the bottom sheet to reduce friction between the bottom sheet and the stack tray and between the bottom sheet and the sheet immediately thereabove.
REFERENCES:
patent: 2806696 (1957-09-01), Bishop
patent: 2852255 (1958-09-01), Fischer
patent: 3193282 (1965-07-01), Stewart
patent: 3231263 (1966-01-01), MacNeill et al.
patent: 3252702 (1966-05-01), Halbert
patent: 3385593 (1968-05-01), Snellman
patent: 3575410 (1971-04-01), Suzuki
patent: 3596901 (1971-08-01), Rehm et al.
Maliwacki, IBM Technical Disclosure Bulletin, "Document Picker Cam," Vol. 11, No. 11, 4-1969.
Blunk Evon C.
Stoner Jr. Bruce H.
Xerox Corporation
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