Polymeric films and bags
AssigneePoly-America, L.P.
InventorBrad A. Cobler
Life of this patent
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Abstract
The present invention is directed to a method of incrementally stretching polymeric film formed from a blown film extrusion process. The present invention is further directed to a polymeric bag formed from an incrementally stretched polymeric film. The incremental stretching is performed on a collapsed polymeric bubble via a pair of intermeshing rollers. The incrementally stretched polymeric film may be stretched only along a portion of its width. The polymeric bag may be a drawstring trash bag with an extended hem where only the extended hem of the bag or the body of the bag comprises incrementally stretched polymeric film.
Claims19
A bag formed from polymeric film of a collapsed bubble, the bag comprising:
- a front panel and a back panel, the front panel and back panel generally joined along a first side edge, a second side edge, and a bottom edge of the respective front panel and back panel,
- the front panel having an upper distal edge opposite the bottom edge, the distal edge resulting from a folded over portion of the front panel providing a first hem and a first overlap area immediately below the first hem, a top of the first hem defining an upper opening of the bag,
- the first overlap area comprising at least two layers of polymeric film below the first hem, a first lower seal sealing together the at least two layers of polymeric film, and
- the first hem comprising incrementally stretched polymeric film.
A bag formed from polymeric film of a collapsed bubble, the bag comprising:
- a front panel and a back panel, the front panel and back panel generally joined along a first side edge, a second side edge, and a bottom edge of the respective front panel and back panel,
- the front panel having a distal edge opposite the bottom edge, the distal edge of the front panel resulting from a folded over portion of the front panel providing a first hem and a first overlap area immediately below the first hem, a top of the first hem defining an upper opening of the bag,
- the first overlap area comprising at least two layers of polymeric film sealed together by a first lower seal below the first hem,
- the first hem comprising incrementally stretched polymeric film, and
- the front panel below the first overlap area comprising un-stretched polymeric film.
A bag formed from polymeric film of a collapsed bubble, the bag comprising:
- a front panel and a back panel, the front panel and back panel generally joined along a first side edge, a second side edge, and a bottom edge of the respective front panel and back panel,
- the front panel having a distal edge opposite the bottom edge, the distal edge of the front panel resulting from a folded over portion of the front panel providing a first hem and a first overlap area immediately below the first hem, a top of the first hem defining an upper opening of the bag,
- the first overlap area comprising at least two layers of film below the first hem sealed together by a first lower seal,
- a first hem seal sealing the folded over portion to the front panel at a bottom of the first hem,
- a first bag body of the first panel defined between the first lower seal and the first bottom edge,
- the first bag body comprising an incrementally stretched polymeric film, and
- the front panel above the first lower seal comprising un-stretched polymeric film.
Dependencies are inferred from the claim text.