A side sealing apparatus for a shrink packaging machine comprising closed loop temperature control of a heater for maintaining an optimum temperature for cutting and sealing two layers of thermoplastic film. The heater comprises a cable or cartridge heater with an internal thermocouple, and it is connected...http://www.google.es/patents/US7281362?utm_source=gb-gplus-sharePatente US7281362 - Film side sealing apparatus with closed-loop temperature control of a heater
Film side sealing apparatus with closed-loop temperature control of a heater
