Method and apparatus for flattening and sealing pouch tops

Details Method and apparatus for flattening and sealing pouch tops Method and apparatus for flattening and sealing pouch tops

1975-08-06

1977-08-16

Spruill, Robert Louis

Package making

Interrelated or safety controls

53 44, 53371, 53373, B65B 706

Patent

active

040416739

ABSTRACT:
Apparatus for flattening and sealing the mouth of a filled pouch, comprising clamping jaws and coacting gripping rolls arranged to simultaneously grasp the leading and trailing ends at the mouth of a pouch moving along a predetermined path towards sealing rolls for pulling the leading and trailing ends in opposite directions so as to straighten the edges at the mouth and a jet heater situated between the gripping rolls and the sealing rolls for rendering the smoothly straightened edges adhesive while traveling therebetween. The sealing rolls simultaneously squeeze the adhesive edges and chill them to effect a seal. There are belts having spaced parallel runs extending from the coacting gripping rolls to the sealing rolls for gripping the sides of the pouch below the smoothly straightened edges to hold the latter flat as the pouch travels from the gripping rolls through the jet heater to the sealing rolls.

REFERENCES:
patent: 2277289 (1942-03-01), Bergstein et al.
patent: 2691857 (1954-10-01), Harker
patent: 2913862 (1959-11-01), Sabee
patent: 3381446 (1968-05-01), Marchand
patent: 3381448 (1968-05-01), Ayres et al.
patent: 3545166 (1970-12-01), Johnson et al.
patent: 3559372 (1971-02-01), Cerioni
patent: 3606727 (1971-09-01), Davis
patent: 3720565 (1973-03-01), Cavanna

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