Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1974-10-18
1976-04-06
Whitby, Edward G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
24201C, 150 3, 156259, 156 66, 156306, 156580, 228 1, B32B 3116
Patent
active
039487059
ABSTRACT:
A mechanism and method for making material for multiple plastic bags with reclosable fasteners thereon, including either continuously supplying a flattened plastic film tube and cutting a strip from the front wall to expose the rear wall or supplying a flattened film sheet and folding back both ends so as to leave a central exposed section and applying a rear fastener strip to the rear wall or exposed section of the film and applying front fastener strips to the edges of the front wall or folded ends of the film, positioning an anvil within the film and simultaneously applying high speed continuous heat sealing means such as ultrasonic sealing horns to the web portions of the fastener strips and film to form a seal, and thereafter joining the front fastener strips to the rear fastener strip and rolling the material on a supply roll for later cutting the bags down the center of the rear fastener strip, or else continuously supplying a flat film sheet and guiding one or more sets of fastener strips to the surface of said film sheet, positioning an anvil below said film and simultaneously applying high speed continuous heat sealing means, such as an ultrasonic sonic process, to the surface of the web portions of the fastener strips and film sheet to form a continuous seal, and joining and cutting between the fastener strips as required, and crosscutting the assembly to form a series of bags.
REFERENCES:
patent: 3172443 (1965-03-01), Ausnit
patent: 3226787 (1966-01-01), Ausnit
patent: 3554822 (1971-01-01), Schwarzkopf
patent: 3627600 (1971-12-01), Reiter
patent: 3770552 (1973-11-01), Lacam
patent: 3839128 (1974-10-01), Arai
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