A source of radio frequency energy is applied to a low thermal inertia heating element with high thermal conductivity, such as a spool, for rapidly heating the heating element to settable predetermined temperature, which temperature is maintained essentially constant. The heating element is detachably...http://www.google.es/patents/US5360330?utm_source=gb-gplus-sharePatente US5360330 - RF heated mold for thermoplastic materials
