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US3565328A Expired / Lapsed US ⏱️ 0.0 years remaining

Multiwall pinch closure bag with opening feature

Assignee: Amcor Flexibles North America Inc
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Filing: 1969-05-15
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Granted: 1971-02-23
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Expires: 1989-05-15
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Abstract

Abstract A multiwall bag having a pinch closure provided with a tab and a tear strip for opening the bag at the closure. The tab is constituted by a portion of the outer ply of the bag defined by perforations in the outer ply, the tab extending lengthwise of the bag from the edge of the folded-over flap of the pinch closure. The tear strip extends crosswise of the bag under the flap and is adapted to be pulled to tear an opening in the closure after pulling the tab.

Inventors

  • 👤 Harold D Hudson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 14:42
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/66; B65D75/68; B65D31/00; B65D31/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 141 words
A multi-ply paper bag having a pinch closure at one end comprising a closure flap at said one end constituted by an extension of one wall of the bag folded over on the outside of the outer wall of the bag and adhered thereto across the width of the bag, the outer ply of the bag in said other wall having openings therein defining the periphery of a tab extending lengthwise of the bag in the outer ply of said other wall from the region of said other wall adjacent and underneath the edge of the folded-over flap, the tab being joined to the surrounding portion of the outer ply between the openings, and being adapted to be grasped and pulled to tear the ply of the bag inward of the outer ply being intact in the region of said openings.
Claim 2
Dependent Claim 141 words
A multi-ply paper bag having a pinch closure at one end comprising a closure flap at said one end constituted by an extension of one wall of the bag folded over on the outside of the outer wall of the bag and adhered thereto across the width of the bag, the outer ply of the bag in said other wall having openings therein defining the periphery of a tab extending lengthwise of the bag in the outer ply of said other wall from the region of said other wall adjacent and underneath the edge of the folded-over flap, the tab being joined to the surrounding portion of the outer ply between the openings, and being adapted to be grasped and pulled to tear the ply of the bag inward of the outer ply being intact in the region of said openings.
Claim 3
Dependent Claim 54 words
A bag as set forth in claim 1 wherein the outer ply is formed with slits defining the sides of the tab and a line of perforations defining the end of the tab, the slits permitting insertion of a finger to tear the tab loose from the outer ply along the line of perforations.
Claim 4
Dependent Claim 147 words
A multi-ply paper bag having a pinch closure at one end comprising a closure flap at said one end constituted by an extension of one wall of the bag folded over on the outside of the other wall of the bag and adhered thereto across the width of the bag, a portion of the outer ply of the bag in said other wall constituting a tab extending lengthwise of the bag from the edge of the folded-over flap, the tab being adapted to be grasped and pulled to tear the flap to provide an opening at said end of the bag, further having a tear strip extending aCross said other wall of the bag under said flap, pulling the tab to tear the flap exposing the tear strip so that the latter may be pulled to tear an opening in the closure extending laterally of the bag.
Claim 5
Dependent Claim 147 words
A multi-ply paper bag having a pinch closure at one end comprising a closure flap at said one end constituted by an extension of one wall of the bag folded over on the outside of the other wall of the bag and adhered thereto across the width of the bag, a portion of the outer ply of the bag in said other wall constituting a tab extending lengthwise of the bag from the edge of the folded-over flap, the tab being adapted to be grasped and pulled to tear the flap to provide an opening at said end of the bag, further having a tear strip extending aCross said other wall of the bag under said flap, pulling the tab to tear the flap exposing the tear strip so that the latter may be pulled to tear an opening in the closure extending laterally of the bag.
Claim 6
Dependent Claim 19 words
A bag as set forth in claim 3 wherein the tab is located toward one side of the bag.
Claim 7
Dependent Claim 38 words
A bag as set forth in claim 4 wherein the tear strip is located between the adhesive which secures the flap to said other wall of the bag and the fold on which the flap is folded over.
Claim 8
Dependent Claim 28 words
A bag as set forth in claim 5 wherein the tear strip is adhered in place by said adhesive along the edge of the strip opposite said fold.
Claim 9
Dependent Claim 17 words
A bag as set forth in claim 5 wherein the tear strip extends straight across the bag.
Claim 10
Dependent Claim 39 words
A bag as set forth in claim 5 wherein the tear strip has a portion extending straight across the bag from the other side of the bag toward said one side and an end portion angled toward said tab.

References Cited (Backward Citations)

US3203620A Cited
US3227359A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-02-22 1974-08-24 1975-02-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-02-22 1978-08-24 1979-02-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-02-22 1982-08-24 1983-02-23 $7700.00 Window Closed / Lapsed

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