Induction coil heating unit for heat sealing closures to contain

Details Induction coil heating unit for heat sealing closures to contain Induction coil heating unit for heat sealing closures to contain

1987-01-02

1988-06-28

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1057, 219 1053, 219 1043, 1562742, 1563802, H05B 640

Patent

active

047541130

ABSTRACT:
This relates to an induction heating coil unit which includes a conventional one turn induction coil which has associated therewith a laminated core. The core is formed of electrically conductive metal members and insulating, preferably plastic, members. The core members are arranged in stacked relation over the coil and then the core is normally potted in a supporting structure preferably of a plastic material. Where maximum heat is required, the concentration of the conductive members is increased. By varying the ratio of the conductive members to the insulating spacer members, the desired electrical energy may be induced into a closure having an intermediate metal barrier layer so as to control the heating of the closure and thus the heat bonding of the closure to an associated container.

REFERENCES:
patent: 3121780 (1964-02-01), Mucha et al.
patent: 3303314 (1967-02-01), Kuhlbars
patent: 3562030 (1971-02-01), Seulen et al.
patent: 3651299 (1972-03-01), O'Neill
patent: 3659069 (1972-04-01), Balzer et al.
patent: 3738892 (1973-06-01), Curcio
patent: 3775722 (1973-11-01), Wentz
patent: 3800115 (1974-03-01), Cachat
patent: 4549057 (1985-10-01), Anderson
patent: 4590347 (1986-05-01), Thatcher et al.

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