2024年4月13日发(作者：)

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专利名称：Sheet stacking apparatus

发明人：Michael Kermit Bullock,Sherwood Anderson

Clay,Gregory Bingham Overton

申请号：US05/774579

申请日：19770304

公开号：US04068839A

公开日：19780117

摘要：A dual exit tray xerographic machine, having a hot roll fuser, supplies its output

copy sheets to a large-capacity exit pocket whereat the sheets are stacked in a vertically

extending pile, on a servo-movable elevator platform. The platform height is servo

controlled so as to maintain the stack's top sheet at a fixed position relative to a fixed-

position, generally horizontally extending, sheet discharge path.

Sheet stacking is enhanced by a pair of movable bars. A hold- down bar, in its

quiescent position, presses the stack's trailing edge portion down to insure reliable

insertion of the next sheet. A pusher bar is maintained in an elevated quiescent position

during such insertion.< P>

After the sheet has been inserted, the pusher bar lowers onto the stack, at a position

between the hold-down bar and the stack's leading edge. The pusher bar thus holds the

just-inserted sheet down. The hold-down bar synchronously moves in a generally

elliptical path, to first clear the trailing edge of the just-inserted sheet. The hold-down

bar then moves in an upward path until it again overlies the stack's trailing edge. The

hold-down bar now descends onto the stack, as the pusher bar returns to its quiescent

position.

申请人：INTERNATIONAL BUSINESS MACHINES CORPORATION

代理人：Francis A. Sirr

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