Method to strip a portion of an insulated wire
According to the method of stripping a portion of a wire of the invention, the insulated wire including the wire core are first flattened before the insulation is stripped away. The flattening eases the stripping as the insulation is partially cracked and dissociated of the wire core, and the stripping is more efficiently applied on a flat surface. A wire stripping machine and a transponder antenna with stripped portions are also claim as being part of the invention.
1. A method to strip bare a portion of an insulated wire comprising at least a wire core surrounded by an insulation, wherein before stripping away the insulation, said portion of the wire including its insulation and wire core are first flattened.
2. The method according to claim 1 , wherein the width of the core of said portion of the wire is increased at least by 20% by the flattening operation.
3. The method according to claim 1 , wherein the wire has a diameter of less than 250 micrometers, and preferably of 100 micrometer or less.
4. The method according to claim 1 , wherein said portion of the wire is flattened by means of a pair of rotating barrels.
5. The method according to claim 1 , wherein said portion of the wire is flattened by means of at least a press or a hammer means.
6. The method according to claim 1 , wherein means to flatten said portion of the wire are provided, said means comprising means to crack the insulation, preferably by imprinting a profile in the insulation.
7. The method according to claim 1 , wherein the insulation is stripped by mechanical means, in particular through at least a scraping edge applicable on a flattened surface of the portion of the wire.
8. The method according to claim 1 , wherein the insulation is stripped away by laser radiation, preferably with a direction of radiation approximately perpendicular to a flattened surface of the portion of the wire.
9. The method according to claim 1 , wherein only one partial surface of a flattened portion is stripped of its insulation during the stripping step.