A self-opening bag includes front and real walls joined at their respective first and second side and bottom edges. The bag is folded at least once parallel to its side edges. At least one attaching feature is located on the outer surface of the bag adjacent the upper end and between the folded wall
A self-opening bag includes front and real walls joined at their respective first and second side and bottom edges. The bag is folded at least once parallel to its side edges. At least one attaching feature is located on the outer surface of the bag adjacent the upper end and between the folded walls. The bag is releasably attached to a subsequent bag. The at least one attaching feature causes the bag to open as the bag is pulled from the subsequent bag. The once folded bag may be sealed at the bottom edges after folding to form a star-sealed bag bottom. The bags may be removably attached to each other at a perforation line and wound onto a compact roll for use with a bag dispenser. The bags may have an upper seam, a U-shaped cut and a pair of bag handles. The bags may be corona treated.
대표청구항▼
1. A self-opening bag, comprising: a front wall, said front wall having an inner surface, an outer surface, first and second side edges, a top edge and a bottom edge;a rear wall, said rear wall having an inner surface, an outer surface, first and second side edges, a top edge and a bottom edge;said
1. A self-opening bag, comprising: a front wall, said front wall having an inner surface, an outer surface, first and second side edges, a top edge and a bottom edge;a rear wall, said rear wall having an inner surface, an outer surface, first and second side edges, a top edge and a bottom edge;said front wall being joined to said rear wall adjacent respective first and second side edges thereof;said front wall being sealed to said rear wall adjacent respective bottom edges thereof;an open mouth disposed adjacent said top edges;said bag being folded twice parallel to said side edges to form a Z-folded bag one third of a width of said bag;said outer surface of said front wall having first, second and third portions, each of said portions having an upper end adjacent said open mouth;said outer surface of said rear wall having fourth, fifth and sixth portions, each of said portions having an upper end adjacent said open mouth;at least one attaching feature, said attaching feature being selected from the group comprising: cold staking, hot pinning, multiple corona treatment, corona treatment with pressure points, knife cutting with pressure, wherein said knife cutting with pressure causes edges of a knife cut through adjacent bag layers to adhere together, special resin formulations, and glue spotting;said attaching feature disposed at at least one of a first point between said second portion and said third portion adjacent said upper end and a second point between said fourth portion and said fifth portion adjacent said upper end;said attaching feature securing at least one of said second portion to said third portion and fourth portion to said fifth portion;said bottom edges of said folded bag being releasably attached to said top edges of a subsequent folded bag;said folded bags being rolled into a compact bag roll; andsaid at least one attaching feature causing said bag to open as said bag is pulled from said subsequent bag. 2. The self-opening bag, as described in claim 1, wherein said front and rear walls of each of said bags is removably attached by a perforation line at said bottom edges to said top edges of said subsequent bag. 3. The self-opening bag, as described in claim 1, further comprising: a chisel cut, said chisel cut extending through a center point of said perforation line; andwhereby, when said compact roll is installed in a bag dispenser said chisel cut will engage a separating tongue when bags are pulled from said roll. 4. The self-opening bag, as described in claim 1, wherein the bags are rolled about a core. 5. The self-opening bag, as described in claim 1, further comprising at least one side gusset, said side gusset extending inwardly from at least one of said first and second side edges of said front and rear walls. 6. The self-opening bag, as described in claim 1, further comprising a bottom gusset, said bottom gusset extending upwardly from said bottom edges. 7. The self-opening bag, as described in claim 1, wherein said outer surface of at least one of said front wall and said rear wall of said bags is corona treated. 8. The self-opening bag, as described in claim 1, wherein said attaching feature is any of a natural substance, a synthetic substance and other attaching means not requiring a separate substance. 9. The self-opening bag, as described in claim 1, wherein said attaching feature is any of sprayed, rolled and dropped on said outer bag surfaces. 10. The self-opening bag, as described in claim 1, wherein said attaching feature comprises any of mechanical and electrical manipulation of said bag surfaces.
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이 특허에 인용된 특허 (41)
Jensen Harold A. (31 Annadea Rd. Brockton MA 02402), Apparatus for the manufacture of block-sealed side-gussetted bags.
Beasley M. Wayne (Bishopville SC) Fletcher Wade D. (Hartsville SC) Wilfong ; Jr. Harry B. (Hartsville SC), Self-opening polyethylene bag stack and process for producing same.
Beasley M. Wayne (Bishopville SC) Fletcher Wade D. (Hartsville SC) Wilfong ; Jr. Harry B. (Hartsville SC), Self-opening polyethylene bag stack and process for producing same.
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