A bag is formed in a gusset bag shape, and sections respectively extending along the short-side portions of a pair of front and back principal-surface film portions are each joined together as end joint portions, to thereby seal frozen food inside the bag. In each end joint portion: the pair of V-shape segments of a side-surface film portion, which is folded inward in a V-shape, is not joined together; and an end of the side-surface film portion is joined only to the ends of the pair of front and back principal-surface film portions extending along the respective short-side portions thereof, to thereby form a side joint region formed so as to expand in a V-shape, each side joint region being formed by joining the end of the side-surface film portion and the ends of the respective principal-surface film portions extending along the short-side portion thereof.

A container structure for sealing and keeping food fresh, which can be repacked after unpacking. The container structure has a container body and a covering film; the container body has a housing chamber, a first abutting face, a concave groove portion, a second abutting face and a preset break line; the covering film can seal the housing chamber and bond with the first and second abutting face, specifically, it is bonded to the first abutting face through the micro sealing portion, so that the bonding between the covering film and the first abutting face is weaker than the bonding between the second abutting face; To open the covering film, the user needs to apply a force upon the external edge of the top end of the container body, to break the preset break line, and to separate the covering film from the first abutting face, so as to form a separated and independent frame.

A self-venting adhesive patch and method of manufacture for frozen food product packages is provided. The patch is made from a film material having a permanent adhesive zone applied to a surface of the film material. A releasable adhesive zone adjacent to the permanent adhesive zone is defined on the surface of the film material and is also provided to allow for venting while cooking. A non-adhesive zone within the permanent adhesive zone on the surface of the film covers a vent formed in a microwavable packaging material covered by the self-venting adhesive patch. The non-adhesive zone directs steam pressure towards the releasable adhesive zone. A package formed from the microwavable packaging material vents steam to the self-venting adhesive generated during cooking of contents of the package. The steam expands the non-adhesive zone and vents into the releasable adhesive zone, allowing steam to be vented from the self-venting patch.

A package suitable for storing and cooking foods without user manipulation includes a venting mechanism actuated primarily or exclusively by temperature, rather than pressure. A vent hole can be sealed by a patch attached by a thermoplastic adhesive having a selected, well characterized Tg, or the patch itself can be a thermoplastic polymer having a selected Tg. The patch can be convection-heated, or a microwave absorbing susceptor material can be applied to the adhesive or patch for direct microwave heating. The patch can include a region that is melted by convection or by a susceptor material. A porous patch can be sealed by a low melting temperature polymer or by thermally sensitive ink. And/or, microwave susceptor material can be applied directly to a package wall and can melt a ventilation hole through the wall when a specified amount of microwave energy has been applied.

A method for forming a food package product is disclosed. The food package product includes layers and patches of adhesive strategically placed on packaging stock that prevents leakage of liquid products. In an exemplary embodiment, the food package product is microwavable popcorn.

A food container includes a case including a food storage space, a peripheral flange on tops of the case, a first heat joining area on the peripheral flange, and a first less adhesive area on the first heat joining area; a closure device including a heat sealing layer, an outer layer attached to the heat sealing layer, a second heat joining area on a peripheral edge of the closure device and corresponding to the first heat joining area, and a second less adhesive area on the second heat joining area and corresponding to the first less adhesive area; and a non-sticky after heated lacquer layer disposed between and at the first and second less adhesive areas. After heating the container, the non-sticky after heated lacquer layer is softened and does not adhere to the second less adhesive area to form an exit for releasing both steam and pressure.

A container structure for sealing and keeping food fresh, which can be repacked after unpacking. The container structure has a container body and a covering film; the container body has a housing chamber, a first abutting face, a concave groove portion, a second abutting face and a preset break line; the covering film can seal the housing chamber and bond with the first and second abutting face, specifically, it is bonded to the first abutting face through the micro sealing portion, so that the bonding between the covering film and the first abutting face is weaker than the bonding between the second abutting face; To open the covering film, the user needs to apply a force upon the external edge of the top end of the container body, to break the preset break line, and to separate the covering film from the first abutting face, so as to form a separated and independent frame.

A package includes a container formed to include an interior region and a mouth opening into the interior region and a closure coupled to the container to close the mouth. The closure is made from a film coupled to a brim included in the container.

A package includes a container formed to include an interior region and a mouth opening into the interior region and a closure coupled to the container to close the mouth. The closure is made from a film coupled to a brim included in the container.

A package suitable for storing and cooking foods without user manipulation includes a venting mechanism actuated primarily or exclusively by temperature, rather than pressure. A vent hole can be sealed by a patch attached by a thermoplastic adhesive having a selected, well characterized Tg, or the patch itself can be a thermoplastic polymer having a selected Tg. The patch can be convection-heated, or a microwave absorbing susceptor material can be applied to the adhesive or patch for direct microwave heating. The patch can include a region that is melted by convection or by a susceptor material. A porous patch can be sealed by a low melting temperature polymer or by thermally sensitive ink. And/or, microwave susceptor material can be applied directly to a package wall and can melt a ventilation hole through the wall when a specified amount of microwave energy has been applied.