US 9,315,319 B2Granted

Continuous process for trash bag with inner bag

AssigneeThe Glad Products Company

InventorsJason R. Maxwell, Robert W. Fraser, Michael G. Borchardt, Jack A. MacPherson, Robert T. Dorsey, Scott Binger, Shaun T. Broering

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Abstract

Trash bags may be formed to include first and second sidewalls joined along a first side edge, an opposite second side edge, and a closed bottom edge to form an outer bag. A second inner bag may be inserted within the first bag to form a “bag-in-a-bag” type configuration in which the inner bag is bonded to the outer bag along side seals by a continuous process. The bags may also be bonded together along the hem and the draw tape. When the side seals of the inner bag and the outer bag are sealed together by a continuous rather than a reciprocating process, the inventors have surprisingly found that such seals require carefully controlled process conditions to prevent inadequate seals.

Claims20

Dependent claims

A bag having an interior and an exterior and comprising:

an outer bag having a first sidewall made of a first flexible thermoplastic web material and a second sidewall of a sheet of the first flexible thermoplastic web material of the same sheet folded, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls joined along a first sealed side edge, an opposite second sealed side edge, and a closed bottom folded edge, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
an inner bag separated from and within the interior volume of the outer bag and having a first sidewall made of the first flexible thermoplastic web material and a second sidewall of a sheet of the first flexible thermoplastic web material of the same sheet folded, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls of the inner bag joined along the first sealed side edge and the second sealed side edge of the outer bag, and a closed bottom folded edge of the inner bag, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
a first hem seal extending from the first sealed side edge to the second sealed side edge along the first sidewall, wherein along a length of the first hem seal, the first hem seal is broken or partially broken along one side of the first hem seal compared to an opposing side of the first hem seal;
and
a first continuous seal securing the outer bag first sealed side edge and the inner bag first sealed side edge together.

2 more elements

A bag having an interior and an exterior and comprising:

an outer bag having a first sidewall made of a first flexible thermoplastic web material and a second sidewall of the first flexible thermoplastic web material, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls joined along a first sealed side edge, an opposite second sealed side edge, and a closed bottom edge, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
an inner bag separated from and within the interior volume of the outer bag and having a first sidewall made of the first flexible thermoplastic web material and a second sidewall of the first flexible thermoplastic web material, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls of the inner bag joined along the first sealed side edge and the second sealed side edge of the outer bag, and a closed bottom edge of the inner bag, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
and
a first continuous side seal extending along a length of the outer bag from the bottom edge to the top edges, the first continuous side seal securing the outer bag first sealed side edge and the inner bag first sealed side edge together, wherein the first continuous side seal is formed by a continuous sealing process that applies heat directly to one side of the outer bag and not an opposing side of the outer bag such that along the length of the first continuous side seal the first continuous side seal is broken or partially broken along one side of the first continuous side seal compared to an opposing side of the first continuous side seal.

1 more element

A bag having an interior and an exterior and comprising:

an outer bag having a first sidewall made of a first flexible thermoplastic web material and a second sidewall of the first flexible thermoplastic web material, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls joined along a first sealed side edge, an opposite second sealed side edge, and a closed bottom edge, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
and
an inner bag separated from and within the interior volume of the outer bag and having a first sidewall made of the first flexible thermoplastic web material and a second sidewall of the first flexible thermoplastic web material, overlaid and joined to the first sidewall to provide an interior volume, the first and second sidewalls of the inner bag joined along the first sealed side edge and the second sealed side edge of the outer bag, and a closed bottom edge of the inner bag, the first and second sidewalls un-joined along their respective top edges to define an opening opposite the bottom edge for accessing the interior volume;
wherein:
the outer bag first sealed side edge and the inner bag first sealed side edge are sealed together by a continuous sealing process that applies heat directly to one side of the outer bag and not an opposing side of the outer bag to form a first side seal that is broken or partially broken along one side of the first side seal compared to an opposing side of the first side seal;
the first side seal extends along a length of the outer bag from the bottom edge to the top edges;
and
the outer bag second sealed side edge and the inner bag second sealed side edge are sealed together by a continuous sealing process that applies heat directly to one side of the outer bag and not an opposing side of the outer bag to form a second side seal that is broken or partially broken along one side of the second side seal compared to an opposing side of the second side seal.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/479,691Filed 24 May 2012 · continuation in part
Priority: 25 Jan 2012
Published: US 2013/0188889 A125 Jul 2013
Granted: 19 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B65F 1/002
Flexible refuse receptables, e.g. bags, sacks: with means for opening or closing of the receptacle
B65F 1/0006
Refuse receptacles; Accessories therefor: flexible refuse receptables, e.g. bags, sacks
B31B 70/645
By applying heat or pressure: making seals transversally to the direction of movement
B31B 70/649
By applying heat or pressure: using tools mounted on a drum

Family

Application13/357,892Parent of this continuation-in-part · filed 25 Jan 2012
US 2013/0188891 A1Pre-grant publication · published 25 Jul 2013
US 2013/0188889 A1Published application
US 9,387,957 B2Related patent
US 9,315,319 B2This patent

From the US filing history. Foreign family members aren’t listed.