Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1988-03-01
1989-11-21
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493232, B31B 190, B31B 2314
Patent
active
048819328
ABSTRACT:
Apparatus and methods are provided for manufacturing plastic film bags with two-piece flaps. A slitting tool slits the flap portion of a longitudinally displaced film strip arrangement and a spacing tool displaces one of the resulting sections to form a gap. Thereafter, an adhesive hearing tape is applied to bridge the gap and connect the separated sections. After this, a cutting tool cuts notches into the two-piece flap portion which is lifted for this purpose by a Teflon-coated template having a slot to receive the cutting tool. The template has a channel system to enable blowing away the cut out portion. The separate bags are formed by sealing and severing at a position to intersect the notches. The method of the invention involves cutting the notches into the flap section to delineate separate flaps and associated bags in a time frame which follows the folding of the flap section over the main body of the bag. Also the method of the invention comprises loading the goods into the bag through an open end with the mouth of the bag being closed by the associated flap. Thereafter, when access to the goods is desired, the flap may be opened to open the associated mouth, the previously open end which is loading the bag having been closed by heat sealing to some other suitable technique.
REFERENCES:
patent: 3595139 (1971-07-01), Adams
patent: 3599538 (1971-08-01), Piazze
patent: 4022457 (1977-05-01), Marin et al.
patent: 4355494 (1982-10-01), Tilman
patent: 4531723 (1985-07-01), Watson
patent: 4586318 (1986-05-01), Litt et al.
patent: 4636191 (1987-01-01), Piggott
Lavinder Jack W.
Schmidt Frederick R.
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