Inductor for induction welding and a method for the manufacture

Details Inductor for induction welding and a method for the manufacture Inductor for induction welding and a method for the manufacture

1982-04-26

1984-02-07

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1043, 219 1049R, 336 61, 336232, H05B 642

Patent

active

044305435

ABSTRACT:
Inductors for the induction welding of complicated welding patterns have been produced up to now mostly from copper plates which were provided with slits in the desired patterns by spark-cutting and embedded into plastic material. This method of manufacture is expensive and does not allow production of inductors with a very detailed pattern because, among other things, the slits must have a minimum width determined by the spark-cutting. By making the inductors in accordance with the present invention having a thin copper foil which is applied onto the surface of an insulating material, these difficulties are overcome and the desired inductor pattern can be produced in a simple manner by etching with the help of a suitable acid. This makes possible great accuracy of detail so that detailed inductors, e.g. for the packaging industry, can be manufactured at low costs.

REFERENCES:
patent: 3505569 (1970-04-01), Schweizerhof
patent: 3560904 (1971-02-01), Wilkes
patent: 3731243 (1973-05-01), Davis
patent: 3769698 (1973-11-01), Lademann et al.
patent: 3790735 (1974-02-01), Peters, Jr.
patent: 3843857 (1974-10-01), Cunningham
patent: 3953700 (1976-04-01), Sindt
patent: 4109128 (1978-08-01), Kohl
patent: 4220839 (1980-09-01), De Leon
patent: 4230923 (1980-10-01), Jeppsson

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