公开(公告)号：DE3783737D1

公开(公告)日：1993-03-04

申请号：DE3783737

申请日：1987-09-22

Applicant: IBM

Inventor： BARELA DANIEL ABRAN ,  BERAN MARK ALEXANDER ,  BUSTAMANTE LOUIS ANDREW ,  MCDONALD CECIL MICHAEL ,  REESE RONALD ELLISON ,  SHEPHERD ROGER DEAN

IPC: B65H43/00 ,  B65H1/14 ,  B65H1/18 ,  B65H3/08 ,  B65H83/00

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 (102) to move a document from the top of a stack of sheets supported by a moveable table (10) to a feedin position, the latter possibly including a vacuum belt (106) for moving the document, sensors (132, 134) supply signals to indicate a sheet has been picked. After moving the pickers and table to initial positions, the controller (150) 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.

公开(公告)号：DE3783737T2

公开(公告)日：1993-07-08

申请号：DE3783737

申请日：1987-09-22

Applicant: IBM

Inventor： BARELA DANIEL ABRAN ,  BERAN MARK ALEXANDER ,  BUSTAMANTE LOUIS ANDREW ,  MCDONALD CECIL MICHAEL ,  REESE RONALD ELLISON ,  SHEPHERD ROGER DEAN

IPC: B65H43/00 ,  B65H1/14 ,  B65H1/18 ,  B65H3/08 ,  B65H83/00

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 (102) to move a document from the top of a stack of sheets supported by a moveable table (10) to a feedin position, the latter possibly including a vacuum belt (106) for moving the document, sensors (132, 134) supply signals to indicate a sheet has been picked. After moving the pickers and table to initial positions, the controller (150) 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.

公开(公告)号：DE3672958D1

公开(公告)日：1990-08-30

申请号：DE3672958

申请日：1986-09-26

Applicant: IBM

Inventor： BUSHAW KENNETH ALLEN ,  BUSTAMANTE LOUIS ANDREW ,  MCCURRY JAMES JOSEPH

IPC: B65H85/00 ,  B65H39/10 ,  B65H83/00 ,  G03B27/62 ,  G03G15/00 ,  G03G15/23 ,  G03G21/00

Abstract: A method and apparatus for copying a duplex original document set, and producing a requested number of duplex copy sets. The apparatus and method utilize a top feed/bottom restack recirculating original document feeder (RADF), and a first-in-first-out (FIFO) duplex tray (18).