Polymeric bags and method to make same
AssigneePoly-America, L.P.
InventorsGregory James Wood, Anthony H. Bertrand
Life of this patent
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Abstract
The present invention is directed to a bag of polymeric film and a method to make the bag. The bag can be comprised of a front panel and a rear panel. The front and rear panels can each be comprised of multiple layers of film. The bag can be formed from a collapsed bubble of polymeric film that has been folded in half so that opposing edges of the collapsed bubble form an opening of the bag. One of the layers of the folded bubble can be split adjacent to an edge of the collapsed bubble and a draw tape film can be inserted between the layers of the folded and collapsed bubble. The collapsed bubble can further be embossed by a pattern that can provide enhanced properties to bags formed from the folded bubble.
Claims20
A method of forming a bag of polymeric film, the method comprising:
- forming a tube of polymeric film, the tube having a machine direction,
- collapsing the tube to form a collapsed tube, the collapsed tube comprising first and second layers and opposing first and second edges, the first and second layers each having first and second halves,
- folding the collapsed tube, the folding positioning the first edge adjacent to the second edge, the folding defining a third edge generally coextensive with a central axis of the collapsed tube,
- sealing the first and second halves of the first layer and the first and second halves of the second layer to each other by a plurality of seals, and
- forming the collapsed tube into a plurality of bags, each bag comprising a front panel and a rear panel, the front panel comprising the first half of the first and second layers, the rear panel comprising the second half of the first and second layers.
A method of forming a bag of polymeric film, the method comprising:
- forming a tube of polymeric film, the tube formed in a machine direction,
- collapsing the tube to form a collapsed tube, the collapsed tube comprising first and second layers and opposing first and second edges, first and second halves of the collapsed tube defined on opposite sides of a central axis of the collapsed tube,
- folding the collapsed tube, the folding positioning the first edge adjacent to the second edge, the folding defining a third edge about a central axis of the collapsed tube,
- slitting the first half of the first layer to form two detached sections,
- positioning one of the two detached sections to expose an inner surface of the second layer,
- inserting a first draw tape between the first and second layers of the first half of the collapsed tube,
- positioning the one of the two detached sections over the first draw tape,
- attaching the two detached sections to the second layer,
- sealing the first and second halves of the first layer and the first and second halves of the second layer to each other by a plurality of side seals extending in a cross direction, and
- separating the collapsed tube into a plurality of bags.
A bag formed from a collapsed tube of polymeric film, the bag comprising:
- a front panel and a rear panel, the front panel and rear panel joined adjacent to a first side edge by a first side seal and adjacent to an opposite second side edge by a second side seal,
- the front panel and rear panel joined at a bottom edge, the bottom edge formed by folding of the collapsed tube such that the bottom edge is generally coextensive with a central axis of the collapsed tube, and
- an opening of the bag defined by an upper edge of the front and rear panels, the upper edge defined by opposing first and second edges of the collapsed tube.
Dependencies are inferred from the claim text.