US PATENT SUBCLASS 271 / 133
.~.~.~.~ With means to prepare pack or bottom sheet for feeding

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}
133.~.~.~.~ With means to prepare pack or bottom sheet for feeding {2}
134  DF  .~.~.~.~.~> By relief of pack weight
135  DF  .~.~.~.~.~> By partial planar movement of bottom sheet

DEFINITION

Classification: 271/133

(under subclass 131) Device provided with means that acts on a stack of sheets or on the lowermost sheet of the stack while the stack is in its holder, which means makes the stack or the lowermost sheet ready for feeding of an individual sheet therefrom.

(1) Note. Included herein are such exemplary devices as one wherein the pack is vibrated to loosen the sheets, or one wherein the edges of the sheets are riffled, or one wherein the sheets pass a diverter which shifts the sheets parallel to their surfaces to break the surface adhesion of one sheet against another.