Electric heating – Metal heating – Of cylinders
Patent
1987-01-02
1988-04-26
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1053, 219 1073, 219 1075, 1563802, 1562742, H05B 610
Patent
active
047406631
ABSTRACT:
This relates to an induction heating unit which is particularly constructed for inducing electrical energy into the periphery of a metal foil barrier layer of a closure for a container to thereby heat the closure and heat bond the closure to the container. In lieu of the customary single turn coil, there is provided a multiple turn coil which is mounted in one of two opposing U-sections of a core. The U-sections may either be formed of ferrite or be of a laminated construction. First legs of the U-sections are utilized to clamp a closure to a container while there will be an air gap between the other opposed legs of the U-sections. Heating may be controlled by either varying the air gap or by varying the ratio of electrically conductive members with insulating spacers.
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Mohr Glenn R.
Roth Donald J.
Brown Charles A.
Brown Charles E.
Continental Can Company Inc.
Leung Philip H.
Shapiro Paul
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