Automatically adapting vacuum holder
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
Expired
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Abstract
This invention relates to a vacuum holder for securing workpieces, such as flexible media or printed circuit boards, through a suction force. Pressure responsive, one way flow valves are incorporated between chambers under suction openings to control the application of suction. This results in a restraining force that is uniform in time and space, resulting in a vacuum holder that has reduced pumping requirements.
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