Tubular bag closing machine

Details Tubular bag closing machine Tubular bag closing machine

1986-02-18

1987-12-15

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Control means energized in response to activator stimulated...

Responsive to machine element

493203, 493207, 493209, 1374875, 156358, 1565831, B31B 100

Patent

active

047130474

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.

REFERENCES:
patent: 3692611 (1970-12-01), Kuhnle
patent: 3726307 (1973-04-01), Corman et al.
patent: 3925139 (1975-12-01), Simmons
patent: 4243469 (1981-01-01), Evers et al.
patent: 4479844 (1984-10-01), Yamada
patent: 4638444 (1987-01-01), Laragione et al.
Smith; Circuit, Devices, and Systems; Copyright 1976, pp. 685-689.
Holman; Experimental Methods for Engineers 3rd Ed.; Copyright 1978; pp. 191-193.

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