Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1977-06-29
1978-09-19
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
156583, B32B 3100, B30B 1534
Patent
active
041151828
ABSTRACT:
An improved sealing apparatus is provided for cutting and heat sealing thermoplastic sheets which are drawn under tension through relatively movable sealing jaws which include heat-applying and cutting means. Coacting male and female sections are provided on the sealing jaws for preventing the thermoplastic sheets from engaging the heat-applying means while the thermoplastic sheets are being drawn under tension through the jaws. In addition, such sections also perform the additional function of applying a clamping force to the thermoplastic sheets when the jaws are in their closed position to overcome the tension on the thermoplastic sheets to thereby prevent slippage of the thermoplastic sheets relative to the sealing jaws during the heat-sealing operation.
REFERENCES:
patent: 3453801 (1969-07-01), Stohlquist
patent: 3672116 (1972-06-01), Ingmarson
patent: 3874976 (1975-04-01), MacFarland, Jr.
patent: 3933569 (1976-01-01), Grasvoll
Arenco Machine Company
Drummond Douglas J.
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