Heat-sealing method for plastic containers

Details Heat-sealing method for plastic containers Heat-sealing method for plastic containers

1974-08-22

1976-10-19

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

93 33H, 93DIG1, 156228, 156306, 264248, B30B 1534, B32B 3118, B32B 3104

Patent

active

039869148

ABSTRACT:
A plastic container is provided with a plastic bead seal at the junction of the interlocking fastener and the side edges of the container. The plastic bead seal acts as a barrier to the passage of fluids or contaminating bacteria through the fastener at this junction. A method and apparatus are provided for flowing plastic under heat and pressure into and across the junction to form the bead seal barrier.

REFERENCES:
patent: 3481100 (1969-12-01), Bergstrom
patent: 3506516 (1970-04-01), Baumann
patent: 3554822 (1971-01-01), Schwarzkopf

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