The present invention relates to improvements for T-shirt bags formed from a side gusseted tube of polymeric film. In particular, the embodiments of the invention provide means for reinforcing the handle seals of a T-shirt bag while limiting the amount of scrap material generated in the manufacturing process. In one embodiment, at least two seals are provided for forming each of the opposing two handles of the T-shirt bag. In further embodiments, a curved lower seal is provided as part of each handle's seal. In additional embodiments, a single seal of a continuous area is provided for each handle.

A hermetically sealed flat container for containing loose materials may include: first and second flexible sheet elements, having polygonal shape, which are coupled together by welds formed along a perimeter of their polygonal shape, to define a volume for containing the materials. The perimeter may define a plurality of edges, one edge forming a bearing edge for the container to rest upon a base. The bearing edge may progressively reduce its transverse dimensions toward one end such that, when the bearing edge rests on the base, a weight-force component of the materials applied to the bearing edge causes a reaction that causes the bearing edge to retract into the volume and imparts vertical stability to the container. The container further comprises a strip of stiffening material attached to the first and second flexible sheet elements, the strip spaced from the bearing edge except for end portions of the strip.

A hermetically sealed flat container for containing loose materials may include: first and second flexible sheet elements, having polygonal shape, which are coupled together by welds formed along a perimeter of their polygonal shape, to define a volume for containing the materials. The perimeter may define a plurality of edges, one edge forming a bearing edge for the container to rest upon a base. The bearing edge may progressively reduce its transverse dimensions toward one end such that, when the bearing edge rests on the base, a weight-force component of the materials applied to the bearing edge causes a reaction that causes the bearing edge to retract into the volume and imparts vertical stability to the container. The container further comprises a strip of stiffening material attached to the first and second flexible sheet elements, the strip spaced from the bearing edge except for end portions of the strip.

A system and method of at least partially forming reinforced packages. The method comprises moving a construct in a machine direction on a construct conveyor. The construct conveyor can comprise a primary lug belt with a primary lug, the construct can be disposed on the primary lug belt, and the moving the construct can comprise moving the primary lug belt in the machine direction to push the construct in the machine direction. The method further can comprise positioning a liner on the construct conveyor so that the liner at least partially extends over the construct and moving the liner in the machine direction on a secondary lug belt of the construct conveyor. The secondary lug belt can comprise a secondary lug and the moving the liner can comprise moving the secondary lug belt in the machine direction to push the liner in the machine direction.

A system and method of at least partially forming reinforced packages. The method comprises moving a construct in a machine direction on a construct conveyor. The construct conveyor can comprise a primary lug belt with a primary lug, the construct can be disposed on the primary lug belt, and the moving the construct can comprise moving the primary lug belt in the machine direction to push the construct in the machine direction. The method further can comprise positioning a liner on the construct conveyor so that the liner at least partially extends over the construct and moving the liner in the machine direction on a secondary lug belt of the construct conveyor. The secondary lug belt can comprise a secondary lug and the moving the liner can comprise moving the secondary lug belt in the machine direction to push the liner in the machine direction.

A plastic film bottom bag has a plastic film front wall that is welded or adhesively joined to side wall sections of adjoining plastic film side walls, and/or a plastic film rear wall that is welded or adhesively joined to the side wall sections of the adjoining plastic film side walls, so as to form a seam or casing seam. Further disclosed is a plastic film bottom bag, in which at least one, in particular both, plastic film side walls are provided with a side fold that comprises a welded or adhesive joint extending from or at a distance from the bag opening edge in the direction of the bag end or up to the bag end. The disclosure further relates to blanks for the plastic film bottom bags described herein and to the use of the plastic film bottom bags described herein, as reusable bags or reusable handbags.

A plastic film bottom bag has a plastic film front wall that is welded or adhesively joined to side wall sections of adjoining plastic film side walls, and/or a plastic film rear wall that is welded or adhesively joined to the side wall sections of the adjoining plastic film side walls, so as to form a seam or casing seam. Further disclosed is a plastic film bottom bag, in which at least one, in particular both, plastic film side walls are provided with a side fold that comprises a welded or adhesive joint extending from or at a distance from the bag opening edge in the direction of the bag end or up to the bag end. The disclosure further relates to blanks for the plastic film bottom bags described herein and to the use of the plastic film bottom bags described herein, as reusable bags or reusable handbags.

A vessel configured to contain a liquid is provided. The vessel includes a collapsible bad, a reusable support structure, a sensor, and a controller. The collapsible bag is operative to contain the liquid. The reusable support structure is operative to support the collapsible bag. The sensor is operative to measure a parameter within the collapsible bag. The controller is in electronic communication with the sensor and operative to introduce an antifoaming agent into the collapsible bag based at least in part on a signal received from the sensor.

A vessel configured to contain a liquid is provided. The vessel includes a collapsible bad, a reusable support structure, a sensor, and a controller. The collapsible bag is operative to contain the liquid. The reusable support structure is operative to support the collapsible bag. The sensor is operative to measure a parameter within the collapsible bag. The controller is in electronic communication with the sensor and operative to introduce an antifoaming agent into the collapsible bag based at least in part on a signal received from the sensor.

A vessel configured to contain a liquid is provided. The vessel includes a collapsible bad, a reusable support structure, a sensor, and a controller. The collapsible bag is operative to contain the liquid. The reusable support structure is operative to support the collapsible bag. The sensor is operative to measure a parameter within the collapsible bag. The controller is in electronic communication with the sensor and operative to introduce an antifoaming agent into the collapsible bag based at least in part on a signal received from the sensor.