B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
270/137
B65H 3/00 (2006.01)
Patent
CA 1090383
A B S T R A C T The specification describes an apparatus for sequentially separating alternate layers of sheet-like workpieces from a single feed stack, the apparatus com- prising a device for separating each top workpiece layer from the feed stack and a device for transporting the separated top workpieces alternately to a first location and to a second location, the separating device includes at least one differentiating head having a pair of rotatable elements, the rotatable elements are mounted such that the axis of rotation of one element is parallel and opposite to that of the other element, needles mounted in the rotatable elements so as to project exteriorly of the elements and in a direction away from the opposite rotatable element, a device for selectively rotating at least one of the rotatable elements with respect to the other to engage and disengage the projecting needles of the rotated element with the top workpiece of the feed stack, depending on the direction of rotation, and for moving only one of the elements, alternately, with respect to the other to vary the spacing between the rotatable elements while the top workpiece is so engaged such that upon rotation of the one element in a direction which engages its projecting needles in the topmost workpiece, at least one edge of the topmost workpiece is thereby curled upwardly and, upon movement of the rotated element with respect to the other element, the topmost workpiece is pulled away from the corresponding edge of the next underlying workpiece by the force of the engaged rotatable element needles to thereby separate the topmost workpiece from the stack.
326479
Levi Strauss & Co.
Macrae & Co.
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