Tubular bag closing machine
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United States of America Patent
Stats
-
Dec 15, 1987
Grant Date -
N/A
app pub date -
Feb 18, 1986
filing date -
Feb 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
To provide for uniform pressure, under predetermined conditions, of application of closure sealing jaws for a bag making machine, to close thermoplastic tubular foils, a hydraulic pressure element (7;26,28) applies the pressure of a pressure jaw (1) against another (2), with the foil interposed; the hydraulic pressure is sensed by a transducer (11), converted into an electrical signal and compared with a command set signal (22), any error or deviation being fed back in a closed loop to a servo positioning valve (13,15) to thereby set the hydraulic pressure with which the movable jaw (1) is applied against a fixed jaw (2) in accordance with commanded value.
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Family
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Cited Art Landscape
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