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Reinforced thin wall plastic bag, and method and apparatus to make material for such bags

  • US 4,076,121 A
  • Filed: 02/17/1976
  • Issued: 02/28/1978
  • Est. Priority Date: 10/15/1973
  • Status: Expired due to Term
First Claim
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1. A continuous roll of thermoplastic bags, said bags having been fabricated from a film of low density polyethylene material having a wall thickness on the order of about 0.02 to 0.05 mm and spaced, peaked ribs integral with the film being formed in the film and having a rib-to-rib spacing on the order of 1/8 cm to 2 cm, said ribs merging smoothly from a projecting peak to the thickness of the walls between the ribs, each individual bag being joined in side-by-side relationship by a transversely positioned heat seal line and having a transversely disposed weakened area in the area of said heat seal line whereby removal of a bag from said roll is effected by tearing along said weakened area.

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