A method of forming a paperboard packaging container from a rectangular body blank is disclosed, the method including the following steps: a) providing a rectangular body blank made from a laminate sheet material; b) forming a tubular container body from the rectangular body blank, the container body having a first end with a first body opening and a second end with a second body opening; c) sealing together the first and the second side edge in a but-to-but seal using a sealing strip having a sealing strip width; d) presenting the tubular container body to a crease line forming station; e) closing the second body opening by pressing a paperboard disc into the second body opening; f) forming a curled second edge by folding or rolling the second end of the container body wall inwardly; g) filling the packaging container with bulk solids; and h) closing the first body opening.

A substantially paper-based composite container for an off-gassing product includes a paperboard can body having a substantially gas-impervious liner attached to an inner surface thereof, and a pair of substantially paper-based end closures attached to the opposite ends of the can body, each end closure defining a generally cylindrical sealing panel in contact with an inner surface of the can body. Heat-sealable materials are disposed on opposing surfaces of the sealing panel and can body. The sealing panels of the end closures are attached to the can body by heat seals. The heat seal for at least one of the end closures is discontinuous such that at least one vent channel extends through the heat seal so as to establish fluid communication between an interior of the composite container and the environment outside the composite container. The at least one vent channel is operable to vent excess gas pressure from the interior of the container.

A paper-based composite container for an off-gassing product includes a paperboard can body having a substantially gas-impervious liner attached to an inner surface thereof, and a pair of substantially paper-based end closures attached to the opposite ends of the can body, each end closure defining a generally cylindrical sealing panel in contact with an inner surface of the can body. Heat-sealable materials are disposed on opposing surfaces of the sealing panel and can body. The sealing panels of the end closures are attached to the can body by heat seals. The heat seal for at least one of the end closures is discontinuous such that at least one vent channel extends through the heat seal to establish fluid communication between an interior of the container and the environment outside the container. The at least one vent channel is operable to vent excess gas pressure from the interior of the container.

A body portion (120A) that is a cylindrical body has one end portion, such as a lower end portion or the body portion (120A) or a first part (126) of a body portion (120), that is folded back inwardly. The body portion (120A) has at least one planar-shaped flat section, such as a second flat section (122) or a fourth flat section (124). A notch, such as a notch (K1) or a notch (K2), is provided at one end, such as a lower end, of the flat section. The one end portion includes a portion provided with the notch, such as by providing the notch (K1) or (K2) at a lower end of the lower end portion of the body portion (120A) or at a distal end of the first part (126A) of the body portion (120).

A paper-based composite container for an off-gassing product includes a paperboard can body having a substantially gas-impervious liner attached to an inner surface thereof, and a pair of substantially paper-based end closures attached to the opposite ends of the can body, each end closure defining a generally cylindrical sealing panel in contact with an inner surface of the can body. Heat-sealable materials are disposed on opposing surfaces of the sealing panel and can body. The sealing panels of the end closures are attached to the can body by heat seals. The heat seal for at least one of the end closures is discontinuous such that at least one vent channel extends through the heat seal to establish fluid communication between an interior of the container and the environment outside the container. The at least one vent channel is operable to vent excess gas pressure from the interior of the container.

The invention is directed to a system and method for hermetically sealing a closure to a container comprising a die assembly and a mandrel assembly. The mandrel assembly comprises an outer mandrel, an inner mandrel, and an ejector disposed within an inner circumference of the inner mandrel. At least the outer mandrel is configured to translate a first distance in a first time period, the inner mandrel and the ejector are configured to translate a second distance in a second time period, the inner mandrel is configured to retract a third distance in a third time period, and the ejector is configured to retract the third distance in a fourth time period.

The invention is directed to a system and method for sealing a closure to a container comprising a die assembly, a mandrel assembly, and a gas evacuation assembly. The mandrel assembly comprises an outer mandrel and an inner mandrel. The outer mandrel is configured to vertically translate and constrain a closure in position. The gas evacuation assembly, which comprises at least one hollow channel within the die and one or more channel openings into the interior of the die, suctions gas from the interior of an aligned container when the closure is constrained in position. The inner mandrel translates vertically to insert the closure into the container and a sealing member seals the closure in place.

A substantially paper-based composite container for an off-gassing product includes a paperboard can body having a substantially gas-impervious liner attached to an inner surface thereof, and a pair of substantially paper-based end closures attached to the opposite ends of the can body, each end closure defining a generally cylindrical sealing panel in contact with an inner surface of the can body. Heat-sealable materials are disposed on opposing surfaces of the sealing panel and can body. The sealing panels of the end closures are attached to the can body by heat seals. The heat seal for at least one of the end closures is discontinuous such that at least one vent channel extends through the heat seal so as to establish fluid communication between an interior of the composite container and the environment outside the composite container. The at least one vent channel is operable to vent excess gas pressure from the interior of the container.

A paper-based composite container for an off-gassing product includes a paperboard can body having a substantially gas-impervious liner attached to an inner surface thereof, and a pair of substantially paper-based end closures attached to the opposite ends of the can body, each end closure defining a generally cylindrical sealing panel in contact with an inner surface of the can body. Heat-sealable materials are disposed on opposing surfaces of the sealing panel and can body. The sealing panels of the end closures are attached to the can body by heat seals. The heat seal for at least one of the end closures is discontinuous such that at least one vent channel extends through the heat seal to establish fluid communication between an interior of the container and the environment outside the container. The at least one vent channel is operable to vent excess gas pressure from the interior of the container.

A cup, a blank for a cup, and a method for forming a cup. As an example, a cup includes a base having a circular bottom and a rim coupled to a perimeter of the bottom; a sidewall extending upwards from the base between an upper edge and a lower edge, the sidewall being continuously coupled to the rim at the lower edge; a plurality of closure panels integrally connected to and extending from the sidewall at the upper edge, the plurality of closure panels includes a first closure panel having a first cutout and a second closure panel having a second cutout; a straw connected to and extending from a second end of the sidewall and extending upwards from near the lower edge to beyond the upper edge; and a tab connected to and extending from a first end of the sidewall and attaching the first end of the sidewall to a second end of the sidewall.