A mold for encapsulating a transformer coil assembly in thermoplastic rubber includes a bottom mold portion having a mold cavity, an upstanding pin disposed within the mold cavity, a mold cover for closing the mold cavity, and a vent space positioned in the bottom surface of the mold cavity for venting...http://www.google.de/patents/US5633019?utm_source=gb-gplus-sharePatent US5633019 - Encapsulated transformer, method of making encapsulated transformer and apparatus for making encapsulated transformer
