US PATENT SUBCLASS 271 / 147
.~.~ Advancer

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

8.1  DF  FEEDING {8}
145  DF  .~ Pack holders {7}
147.~.~ Advancer {5}
148  DF  .~.~.~> With means to move portions of advancer unequally (e.g., for unequal-thickness sheets)
149  DF  .~.~.~> For on-edge or imbricated sheets {1}
152  DF  .~.~.~> Control of advancer responsive to sensing of foremost sheet {3}
157  DF  .~.~.~> With means to replenish pack or retract advancer platform {1}
160  DF  .~.~.~> Urged by spring or weight

DEFINITION

Classification: 271/147

(under subclass 145) Device provided with means to urge a stack of sheets in a direction such that the foremost sheet of the stack is in a position appropriate for removal of single sheets.

(1) Note. The device of this and indented subclasses is

usually for feed from the top of a stack, or for feed from a stack of on-edge or imbricated sheets. A device for feed from the bottom of the stack would not be found herein (since a bottom-feed mechanism does not have a stack-urging means) unless the patent thereto also claimed a weight for urging the stack toward the bottom of the hopper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

22, 24+, 30.1+, 37+, 126+, and 128+, for a device including a pack advancer in combination with a separator of a type appropriate to the subclass under which the pack advancer is indented.

217, for a pile-lowering means for received sheets.