Process for end sealing a bag and apparatus therefor

Details Process for end sealing a bag and apparatus therefor Process for end sealing a bag and apparatus therefor

1974-05-15

1976-04-27

Whitby, Edward G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

53 39, 53373, 93 35R, 156 87, 156217, 156286, 156306, 156322, 156461, 156484, 156497, 156499, 156582, 264 90, B32B 3120

Patent

active

039532720

ABSTRACT:
Superimposed heat-sealable layers are heat-sealed by applying external suction to draw the layers apart, inserting a nozzle between the parted layers, directing hot gas from the nozzle onto the inside surfaces of the layers, removing the nozzle and pressing the heated surfaces together. Preferably the layers are carried by a conveyor, such as between a pair of endless chains, along a path on which the suction means, nozzle means and pressing means are successively arranged.

REFERENCES:
patent: 2632921 (1953-03-01), Kreidl
patent: 2680332 (1954-06-01), Young
patent: 3210227 (1965-10-01), Shichman
patent: 3486955 (1969-12-01), Paabo
patent: 3554828 (1971-01-01), Schmedding et al.
patent: 3582430 (1971-06-01), Benigno
patent: 3717538 (1973-02-01), Hartung
patent: 3734803 (1973-05-01), Lipscomb et al.
patent: 3855037 (1974-12-01), Imhagen et al.

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