Systems and methods for dynamically setting stack height and sheet acquisition time
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United States of America Patent
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Sep 18, 2001
Grant Date -
N/A
app pub date -
Nov 23, 1999
filing date -
Nov 23, 1999
priority date (Note) -
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Abstract
A sheet feeder feeds sheets separated from a stack to a feed head which is translatable toward take away nip rolls. The sheets are separated from the stack by fluffers and acquired by an acquisition surface of the feed head which is in communication with a vacuum pressure. An air knife is used, in conjunction with a corrugation surface, to separate any secondarily acquired sheets from the acquisition surface. The time for acquiring the sheet is determined from the opening of a vacuum valve in communication with the feed head to the acquiring of the sheet by the acquisition surface. A controller adjusts the position of a supporting tray that supports the stack to maintain the sheet acquisition time as short as possible.
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