H - Electricity – 01 – F
Patent
H - Electricity
01
F
327/27
H01F 10/00 (2006.01) B23K 13/00 (2006.01) B29C 65/02 (2006.01) H05B 6/36 (2006.01) E21D 21/00 (2006.01)
Patent
CA 1143017
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 embedding into plastic mate- rial. This method of manufacture is expensive and does not allow to produce inductors with any too 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 invention of 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.
347057
Marks & Clerk
Tetra Pak Developpement Sa
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