Method of Removing a Printing Plate from a Plate Cylinder of a Printing Press
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United States of America Patent
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N/A
Issued Date -
May 17, 2012
app pub date -
Apr 28, 2009
filing date -
Apr 29, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of removing a printing plate, each having leading and trailing edges located in respective lock-up slots in a plate cylinder of a printing press, from said plate cylinder, is disclosed. The method comprises the steps of extracting a first of said leading and trailing edges, rotating the plate cylinder in a first direction such that an extraction element located proximal to the surface of the plate cylinder passes beneath the extracted first edge until the printing plate is lifted off the surface of the plate cylinder by the extraction element, with the second edge still in its lock-up slot, to cause the second edge to move within its lock-up slot as the plate is lifted to loosen said second edge within its lock-up slot, rotating the plate cylinder in a second direction so that said plate drops back and, rotating the plate cylinder in the first direction again so that the extraction element pulls said loosened second edge out of said lock-up slot.
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