Manufacturing container or tube from paper; or other manufacturi – Securing
Patent
1987-09-25
1989-02-28
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Securing
493193, 493208, 493470, 156582, 1565831, B31B 164, B31B 2386
Patent
active
048081507
ABSTRACT:
An oven-heated hot wheel sealing unit for heat sealing thermoplastic film. The unit includes an oven having a heater for heating the air therein. A plurality of rotors are rotatably supported within the oven. Each of the rotors includes a wheel having a rim adapted to extend outside of the oven for engaging the thermoplastic film to be heat sealed. Each rotor has a plurality of spaced fins disposed axially thereof and parallel to the wheel. Stators are positioned within the housing and provided with structure to receive the fins on the rotors. The fins on the rotors have a plurality of vanes adapted to circulate the heated air within the oven for heating the wheels by convection. The rims of the wheels extend through openings in non-stick stripper shoes on the outsides of the oven for stripping the thermoplastic film from the wheels after heat sealing the film.
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Herrington Fox J.
Tendick Clyde C.
McKillop Alexander J.
Mobil Oil Corporation
Schmidt Frederick R.
Speciale Charles J.
Terrell William E.
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