Device for sealing thermoplastic overwraps

Details Device for sealing thermoplastic overwraps Device for sealing thermoplastic overwraps

1975-06-24

1976-09-28

Simpson, Othell M.

Package making

Interrelated or safety controls

53379, 156359, 156583, B65B 5114

Patent

active

039823806

ABSTRACT:
A device for controlling the sealing of thermoplastic wraps comprises contrivances for heat-sealing each wrap, at a speed compatible with individual speed levels of a wrapping machine; cams for causing the heat-sealing contrivances to operate with a reciprocating motion; means sensitive to variations in the speed levels of the machine and which trip the cam linkage so that the sealing action of the heat-sealing contrivances is suitably put into and out of operation; and a heat-sensor so-connected to the heat-sealing contrivances that, following the switching in of the heat-sealing contrivances, follow-up means respond to the reciprocating motion of the cams through differentiated operating time multiple tracks, in such a way as to operate the heat-sealing contrivances in a differentiated operating time to suit the temperature detected in them by the heat-sensor.

REFERENCES:
patent: 3431398 (1969-03-01), Wahle
patent: 3692611 (1972-09-01), Kuhnle

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