Vacuum holding device
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United States of America Patent
Stats
-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Jun 12, 1986
filing date -
Jun 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A holding device using a vacuum clamp arrangement has a suction box closed by a suction plate having a holding surface provided with a plurality of suction bores extending from the holding surface into the suction box. Each of the suction bores has an enlarged expanded bore portion inwardly spaced from the holding surface to form a valve chamber which valve chamber is closed by an inner section of the suction bore between the chamber and the suction box and each of the valve chambers loosely receives the shaped valve reed which will close the inner section of the suction bore for each of the suction bore arrangements which is not covered by the sheet placed on the holding surface. This simple structure keeps vacuum losses low and, therefore, enables utilizing a relatively small vacuum pump for the device.
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