This sheet package includes a sheet roll obtained by winding a sheet on a cylindrical core in the circumferential direction thereof; and a packaging bag that stores the sheet roll, wherein at least one end surface, in the roll width direction, of the sheet roll faces the top surface of the packaging bag, the cylindrical core has an opening in which the end edge of the sheet roll on one end surface side is opened, and a first slit is formed on the top surface so as to overlap the opening of the cylindrical core.

A packaging bag with a body for storing a plurality of articles to be packaged, wherein the body has a top surface part, a bottom surface part that opposes the top surface part in the vertical direction, and a plurality of lateral surface parts that are arranged between the top surface part and the bottom surface part; a slash part for opening is provided to at least one of the plurality of lateral surface parts; and the slash part has a first slit that extends from near the top surface part to near the bottom surface part in the vertical direction, and a second slit that is contiguous to one end of the first slit on the top surface part side and that extends in the traverse direction intersecting the vertical direction.

A packaging bag with a body for storing a plurality of articles to be packaged, wherein the body has a top surface part, a bottom surface part that opposes the top surface part in the vertical direction, and a plurality of lateral surface parts that are arranged between the top surface part and the bottom surface part; a slash part for opening is provided to at least one of the plurality of lateral surface parts; and the slash part has a first slit that extends from near the top surface part to near the bottom surface part in the vertical direction, and a second slit that is contiguous to one end of the first slit on the top surface part side and that extends in the traverse direction intersecting the vertical direction.

The invention comprises an ovenable packaging structure having an integral one-way valve. The laminate structure comprises an outer layer having a cut line which defines a flap that is separable from the outer layer, wherein the outer layer is adhered to an inner layer having a cut line which is offset from the outer cut line and defines a portion that is separable from the inner layer along the inner cut line and defines an opening into the packaging structure. The adhesive between the layers comprises, in an embodiment, a channel of pressure sensitive adhesive which surrounds both the outer cut line and the inner cut line, wherein the channel of pressure sensitive adhesive defines the perimeter of at least one adhesive-free valve chamber within said channel. The valve chamber comprises at least a portion of the outer cut line and the inner cut line.

The invention comprises an ovenable packaging structure having an integral one-way valve. The laminate structure comprises an outer layer having a cut line which defines a flap that is separable from the outer layer, wherein the outer layer is adhered to an inner layer having a cut line which is offset from the outer cut line and defines a portion that is separable from the inner layer along the inner cut line and defines an opening into the packaging structure. The adhesive between the layers comprises, in an embodiment, a channel of pressure sensitive adhesive which surrounds both the outer cut line and the inner cut line, wherein the channel of pressure sensitive adhesive defines the perimeter of at least one adhesive-free valve chamber within said channel. The valve chamber comprises at least a portion of the outer cut line and the inner cut line.

A system and method for storing, shipping, preserving and ripening produce. Packaging of respiring produce, particularly avocados, in sealed tray systems. The tray systems include a lower bowl-shaped tray having an upper lip to which a flexible film is adhered. The flexible film has an aperture covered by a breathable membrane. The film permits passage of water vapor to reduce the chance of mold formation during packaging and shipping. The breathable membrane controls gaseous exchange at different temperatures and has pores that open above the threshold temperature. The breathable membrane alters the O.sub.2 and CO.sub.2 within the tray above the threshold temperature, thus slowing up the ripening process at elevated temperatures.

A system and method for storing, shipping, preserving and ripening produce. Packaging of respiring produce, particularly avocados, in sealed tray systems. The tray systems include a lower bowl-shaped tray having an upper lip to which a flexible film is adhered. The flexible film has an aperture covered by a breathable membrane. The film permits passage of water vapor to reduce the chance of mold formation during packaging and shipping. The breathable membrane controls gaseous exchange at different temperatures and has pores that open above the threshold temperature. The breathable membrane alters the O.sub.2 and CO.sub.2 within the tray above the threshold temperature, thus slowing up the ripening process at elevated temperatures.

A rigid holding container has a flexible cover sheet extending over the holding area for sealing the contents. The container has a wide, flat perimeter lip which provides a firm base for the seal between the cover sheet and the container. A breaching bubble is formed in the seal, under the cover and over the perimeter lip. The consumer breaches the bubble by pressing the bubble against the lip between the thumb and forefinger. The pressure compresses the air in the bubble causing the bubble to expand laterally. The expanding bubble breaches along the perimeter of the lip, producing a peel flap of flexible cover material. The consumer pulls the peel flap while holding the rigid container down, to remove the cover sheet.

A rigid holding container has a flexible cover sheet extending over the holding area for sealing the contents. The container has a wide, flat perimeter lip which provides a firm base for the seal between the cover sheet and the container. A breaching bubble is formed in the seal, under the cover and over the perimeter lip. The consumer breaches the bubble by pressing the bubble against the lip between the thumb and forefinger. The pressure compresses the air in the bubble causing the bubble to expand laterally. The expanding bubble breaches along the perimeter of the lip, producing a peel flap of flexible cover material. The consumer pulls the peel flap while holding the rigid container down, to remove the cover sheet.

A container, preferably a pallet container with a liner bag, includes a base, at least one side wall, and an exchangeable valve assembly that can be mounted in an insertion direction into a valve socket in the container. The container includes at least one locking element for locking engagement of a locking structure of the valve assembly and which is movably mounted in or on the container and can be moved between an open position, in which the valve assembly can be inserted into or removed from the valve socket, and a closed position, in which the locking element engages the locking structure of the valve assembly to secure it inside of the valve socket.