Manufacturing container or tube from paper; or other manufacturi – Control means energized in response to activator stimulated... – Responsive to temperature
Patent
1988-04-15
1989-07-25
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Control means energized in response to activator stimulated...
Responsive to temperature
493191, 493193, 493225, 493928, 156497, B31B 2364, B31B 190
Patent
active
048509442
ABSTRACT:
Apparatus for heat sealing the respective layers of film in a pair of hems in a moving web of film in the manufacture of draw tape bags. A pair of hot air hem sealer units is provided each of the units including a hot air hem sealer heat exchanger having a plurality of nozzles which direct hot air against a continuously moving film. The nozzles are in line with film movement and the film is backed up by a metal plate positioned between the hems. Following the heating phase cool compressed air is directed against the film in the heated area to cool the film prior to contact with the hem seal on the other side of the bag. The heat exchanger includes a plurality of circumferential grooves which deliver hot air to the nozzles. A thermocouple controls the temperature of the hot air.
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Lavinder Jack
McKillop Alexander J.
Mobil Oil Corporation
Schmidt Frederick R.
Speciale Charles J.
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