Plastic bag and method and apparatus of manufacture

Details Plastic bag and method and apparatus of manufacture Plastic bag and method and apparatus of manufacture

1987-06-12

1990-07-24

Garbe, Stephen P.

Flexible bags

Lifting or suspending element

Unitary with bag

383107, 383120, 383903, B65D 3306

Patent

active

049431676

ABSTRACT:
Disclosed is a bag including a front wall and a rear wall and having an open mouth portion in which the front wall and rear wall are joined by pleated portions or gussets. The bag is manufactured so that a longitudinal, thermally welded seam is placed inside a portion of at least one of the gussets at a point other than the central fold. The bag preferably includes handles which are integral extensions of the front and rear walls and the gussets. The bag manufactured according to the principles of the present invention thus eliminates or minimizes failure of thermally welded seams.
Also disclosed is a method for manufacturing the bags and an apparatus for manufacturing the bags.

REFERENCES:
patent: 2465044 (1949-03-01), Shumann
patent: 3185044 (1965-05-01), Ahlbrandt
patent: 3566756 (1971-03-01), Schmid et al.
patent: 4526565 (1985-07-01), Hummel et al.
patent: 4529090 (1985-07-01), Pilon

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