| 摘要 |
<p>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.</p> |
