Pinch closure bags with opening feature and method of manufacturing them
AssigneeBemis Company, Inc.
InventorRichard W. Jacobs
Life of this patent
Estimating the term…
Abstract
A paper bag having a pinch closure provided with a tab extending from within the bag between the portions of the walls of the bag in the pinch closure and projecting out of the pinch closure, the projecting portion of the tab being adapted to be grasped and pulled to tear the bag open at the pinch closure, and a method of manufacturing it involving provision of a bag tube, opening up the tube at one end, and inserting the tab in the tube.
Claims20
A bag having a pinch closure at one end and a tab for opening it at said end, the bag being formed from a bag tube having first and second walls flat against one another, the second wall having an extension beyond the first at said end, the closure comprising a flap constituted by an end portion of the bag tube at said end folded over on a fold line spaced inwardly from the end edge of the first wall at said end, said flap thereby comprising the end portion of the first wall from the fold line to said end edge of the first wall and a portion of the second wall coextensive with said end portion of the first wall and said extension of the second wall, the tab having a section between said portions of the walls with an inner end adjacent the fold, a section underneath said extension, and an outer end section projecting out from under said extension, said flap being adhered to the outside face of the first wall and the outside face of the tab to seal the closure under the flap, the section of the tab underneath the extension being adhered to the outside face of the first wall to seal the closure under the tab, and the outer end section of the tab being free at least in part of the first wall to enable said outer end section of the tab to be grasped and pulled to tear the bag open by tearing away from the first wall of the portion of the flap adhered to the tab.
The method of making a bag with a pinch closure and means for opening the bag at the closure comprising providing a bag tube having first and second walls flat against one another with an extension of the second wall beyond the first wall at one end of the tube, opening up the tube at said one end, inserting a tab into the tube with the tab at its inner end between the walls and at its outer end extending out beyond the end edge of the extension of said one end and adhering the tab to said second wall, forming a pinch closure for the bag tube at said one end by folding over a flap constituted by an end portion of the tube at said one end on a fold line extending transversely of the bag tube spaced inwardly from the respective end edge of said first wall and adjacent the inner end of the tab, the tab being folded over with the flap, and adhering the flap to the outside face of the first wall and the outside face of the tab to seal the closure under the flap, and adhering the section of the tab underneath the extension to said first wall to seal the closure under the tab, leaving the outer end section of the tab which extends out beyond the end edge of the extension free at least in part of said first wall to be grasped and pulled to tear the bag open by tearing away from the first wall of the portion of the flap adhered to the tab.
Dependencies are inferred from the claim text.