Methods of making packages from flexible material, wherein the packages include one or more self-folds formed by applying activation energy to the flexible material.

Methods of opening and adding expansion materials to containers made from flexible materials. The methods involve forming a partially completed container blank that may have four layers of flexible materials. The partially completed container blank may be opened by separating a portion of the first layer from a portion of the second layer by bending portions of the second, third, and fourth layers toward a first direction; and dosing the partially completed container blank, by adding an expansion material out of a dispenser and into a space disposed between a portion of the first layer and a portion of the second layer.

In methods of making disposable, flexible containers for fluent products, methods of sealing the flexible containers when such containers include expansion materials, are disclosed. The methods include forming a partially completed container blank that has layers of flexible materials. The layered structure includes a first space for a fluent product, and a second space for an expansion material. The methods of sealing the flexible containers include adding an expansion material into the second space and pressing parts of at least some of the layers together to close off the second space.

In a method of making disposable, flexible containers for fluent products, methods of opening the flexible containers are disclosed, including methods of opening multi-layer structures to enable filling of fluent product(s). The methods may include opening a partially complete container blank made of three or more layers by separating a portion of one layer from a portion of another layer by bending portions of all of the layers outward toward a first direction; and then bending portions of at some of the layers outward toward a second direction that is within 20 degrees of opposite to the first direction.

Provided are a packaging bag in which the breakage of a handle or irritation to a user's hand due to a load of the packaging bag when the user moves while gripping the handle in a state in which heavy contents such as grain or the like fills the packaging bag can be minimized by forming a sealed handle at the packaging bag, and a method of manufacturing the same.

The packaging bag includes a packaging sheet constituted by a first sheet, and second sheets extending from both sides of the first sheet to be folded in a rear-surface direction of the first sheet so that both ends overlap to be sealed; an upper sealing section sealed so that inner surfaces of the reinforcement film and the packaging sheet adhere to seal an upper section; and a handle section positioned at the upper sealing section and punched to be gripped.

Provided are a packaging bag in which the breakage of a handle or irritation to a user's hand due to a load of the packaging bag when the user moves while gripping the handle in a state in which heavy contents such as grain or the like fills the packaging bag can be minimized by forming a sealed handle at the packaging bag, and a method of manufacturing the same.

The packaging bag includes a packaging sheet constituted by a first sheet, and second sheets extending from both sides of the first sheet to be folded in a rear-surface direction of the first sheet so that both ends overlap to be sealed; an upper sealing section sealed so that inner surfaces of the reinforcement film and the packaging sheet adhere to seal an upper section; and a handle section positioned at the upper sealing section and punched to be gripped.

A packet for viscous material includes a pouch that comprises an expressing-shaped first closure end and a second closure end and at least two opposing sidewalls. The closure ends and sidewalls define an enclosure. At least one closure end has an expressing shape and a separate rigid foldable flat cradles the pouch. The flat is of a material that is more rigid than the pouch. A spout-forming area separate from the pouch and the rigid foldable flat, is positioned on a rigid foldable flat side of the packet. The area is of intermediate rigidity or thickness to the pouch and the rigid foldable flat. The spout-forming area is derived as a remnant from a semi-rigid material strip that acts as a pouch-forming tacking strip during a pouch forming process. The spout-forming area reinforces at least a part of the pouch at the pouch expressing shape first closure end. The separate rigid foldable flat overlaps the spout-forming area to cradle the spout-forming area with the cradled pouch. A crease extends longitudinally in the flat and along the pouch to facilitate folding or rolling the more rigid flat to compress the pouch with the spout-forming area to express a content through the expressing-shaped first closure end.

Provided are a packaging bag in which the breakage of a handle or irritation to a user's hand due to a load of the packaging bag when the user moves while gripping the handle in a state in which heavy contents such as grain or the like fills the packaging bag can be minimized by forming a sealed handle at the packaging bag, and a method of manufacturing the same. The packaging bag includes a packaging sheet constituted by a first sheet, and second sheets extending from both sides of the first sheet to be folded in a rear-surface direction of the first sheet so that both ends overlap to be sealed; a reinforcement film inserted and fixed between the first sheet and the second sheets; an upper sealing section sealed so that inner surfaces of the reinforcement film and the packaging sheet adhere to seal an upper section; and a handle section positioned at the upper sealing section and punched to be gripped.

Provided are a packaging bag in which the breakage of a handle or irritation to a user's hand due to a load of the packaging bag when the user moves while gripping the handle in a state in which heavy contents such as grain or the like fills the packaging bag can be minimized by forming a sealed handle at the packaging bag, and a method of manufacturing the same. The packaging bag includes a packaging sheet constituted by a first sheet, and second sheets extending from both sides of the first sheet to be folded in a rear-surface direction of the first sheet so that both ends overlap to be sealed; a reinforcement film inserted and fixed between the first sheet and the second sheets; an upper sealing section sealed so that inner surfaces of the reinforcement film and the packaging sheet adhere to seal an upper section; and a handle section positioned at the upper sealing section and punched to be gripped.

A sealed package includes first and second opposed plies, each with first and second edges, wherein the first edges of the first and second plies have overlying sections that form a first seal, and wherein the second edges of the first and second plies have overlying sections that form a second seal; the first and second plies include polymeric film. A score line is present adjacent the second seal, the score line only partially penetrating the first ply and extending less than a full width of the first ply.