A method for locally heating objects, in particular thin sheet metal, by charging the objects by means of a plasma ignited between two electrodes. In order to keep the thermal stress of a subject as low as possible outside of the zone to be heated it is provided that the machining such as spot welding...http://www.google.com/patents/US6353200?utm_source=gb-gplus-sharePatent US6353200 - Method for the partial fusion of objects
