Flexible bags – Plural
Patent
1995-06-07
1997-03-18
Pascua, Jes F.
Flexible bags
Plural
383 35, 383 77, B65D 3316
Patent
active
056116276
ABSTRACT:
There is provided a thermoplastic film bag having at least two integral members that facilitate opening the bag. The bag is manufactured from a flattened tube of thermoplastic material which may be distinctively severed along independent phase shifted sinusoidal oscillating paths down the center of the collapsed tube. The bag may have two opposed tie members which are offset from the vertical center axis of the bag and from each other. The tie members may be grasped and pulled apart to facilitate the easy opening of the bag. The tie members may then be tied together to form a strong member by which the bag may be picked up and carried. In alternate embodiments the shape of the integral tie members can be modified to create a bag having only the easy open feature with no tie members. A method for making the bag is also described. In an alternative embodiment the bag may include linear slitting regions positioned at each bag side edge. These regions facilitate the accurate registration of bag side edge heat seals and weakened areas therebetween. The linear slitting regions are characterized by zones of continuously overlapping bag material.
REFERENCES:
patent: 144238 (1873-11-01), Stow
patent: 2822012 (1958-02-01), Gold
patent: 4445230 (1984-04-01), Spadaro
patent: 4764029 (1988-08-01), Abblett
patent: 4890736 (1990-01-01), Greyvenstein
patent: 5246110 (1993-09-01), Greyvenstein
Belias William P.
Vaquero Edward A.
Pascua Jes F.
Tenneco Packaging
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