Pneumatic actuator, especially for controlling a basis weight profile of a web actuator
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United States of America Patent
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Oct 2, 2001
Grant Date -
N/A
app pub date -
Dec 4, 1998
filing date -
Dec 5, 1997
priority date (Note) -
Expired
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Abstract
A pneumatic actuator for control of the coating thickness or basis weight of a coating apparatus for paper or cardboard webs has a pair of spring metal plates which can be deflected outwardly by a pneumatically extendable cushion between these plates in a frame. One end of the pair of plates is anchored while the other end is attached to a coating pin which works against a compression spring counteracting the outward deflection of the metal plates.
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