Sheet feeding or delivering – Feeding – Separators
Patent
1986-11-28
1988-03-15
Rolla, Joseph J.
Sheet feeding or delivering
Feeding
Separators
271103, 271155, 271162, 414118, B65H 308
Patent
active
047308230
ABSTRACT:
Sheet feeder having adaptive mechanism for assuring dependable automatic operation when the stack of sheets to be fed consists of sheets having varying thicknesses and weights. In a sheet feeder having pickers to move a document from the top of a stack of sheets supported by a moveable table to a feed-in position, the latter possibly including a vacuum belt for moving the document, sensors supply signals to indicate a sheet has been picked. After moving the pickers and table to initial positions, the controller moves the picker to a predetermined reference position. If a sheet is picked above or below the predetermined initial position, the position of the table is adjusted accordingly. In a second embodiment in a recirculating automatic sheet feeder, the table is initially positioned then after feeding the sheets from the stack once, it is initialized at a second predetermined position depending on the number of documents in the stack and on the position of the table prior to picking the documents a second time.
REFERENCES:
patent: 3410550 (1968-11-01), Weidman et al.
patent: 3446496 (1969-05-01), Schwebel
patent: 4382593 (1983-05-01), Beran et al.
patent: 4480826 (1984-11-01), Kaneko
patent: 4566684 (1986-01-01), Gysling
patent: 4624454 (1986-11-01), Grutzmacher et al.
Barela Daniel A.
Beran Mark A.
Bustamante Louis A.
McDonald Cecil M.
Reese Ronald E.
Ammeen Edward S.
International Business Machines - Corporation
Rolla Joseph J.
Wright Carl M.
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