Die-cut thermoplastic bag with easy open mouth

Details Die-cut thermoplastic bag with easy open mouth Die-cut thermoplastic bag with easy open mouth

B - Operations, Transporting

31

B

B31B 1/14 (2006.01) B31B 1/64 (2006.01) B31B 19/86 (2006.01) B65D 33/00 (2006.01) B65D 33/10 (2006.01)

Patent

CA 2196414

A roll of handled plastic bags is formed from a continuous collapsed tube. Each bag is bounded by two longitudinally spaced heat seals and is separable from the roll along perforated lines. The bag handles (32) and bag mouth (30) are formed by die cutting the tube. Improved separation of film layers is achieved by perforating a minor bag mouth edge portion centrally located between the opposing major inside smooth edge portions and tearing scrap thermoplastic film from the die-cut bag mouth to provide a rough edge having a series of torn film edge discontinuities which facilitate separation of blocked adjacent film layers during opening of the bag mouth.

Un rouleau de sacs en plastique à poignée est formé à partir d'un tube continu applati. Chaque sac est délimité par deux thermosoudures espacées longidutinalement et peut être séparé du rouleau le long de lignes perforées. Les poignées (32) et la bouche (30) du sac sont formées par découpage du tube à l'emporte-pièce. On obtient une meilleure séparation des couches de film par perforation d'une petite partie de bordure de la bouche du sac située centralement entre les grandes parties de bordure lisses intérieures opposées, et déchirure du film thermoplastique de chute de la bouche du sac découpée à l'emporte-pièce, afin de produire un bord brut présentant une série de parties discontinues de bordure de film déchirées facilitant la séparation de couches de film adjacentes bloquées pendant l'ouverture de la bouche du sac.

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