US PATENT SUBCLASS 271 / 139
.~.~.~.~ By pusher reciprocating variably or non-rectilinearly

Current as of: June, 1999
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271 /   HD   SHEET FEEDING OR DELIVERING

8.1  DF  FEEDING {8}
18  DF  .~ Separators {8}
42  DF  .~.~ Reciprocating {2}
131  DF  .~.~.~ Bottom feed {9}
139.~.~.~.~ By pusher reciprocating variably or non-rectilinearly {1}
140  DF  .~.~.~.~.~> Orbital (e.g., four-way) motion of pusher

DEFINITION

Classification: 271/139

(under subclass 131) Device provided with means to effect to-and-fro movement of the sheet-engaging member, wherein the member may be adjusted relative to the means, or the means may be adjusted relative to the stack, or wherein the means or the member may be moved to-and-fro in other than a straight line.