Embodiments of a reusable stackable shipping box are provided herein. The reusable stackable shipping box may be reused and cleaned without causing harm to the integrity of the box. In addition, the box is slightly tapered in shape such that the box may be stacked upon and within other boxes for ease in shipping and organization.

An expansion devise includes an unexpended slit sheet roll that is wound on a paper core that is wider than the slit sheet paper. The paper core is placed into a yoke that holds the paper in position on each side of the unexpended slit sheet material. An adjustable downward pressure is exerted on the paper core and the paper core exerts pressure on the yoke. As the paper is pulled, this downward pressure creates the friction required to enable the unexpended slit sheet to be unwind and fed while simultaneously expanding. A blank sheet is formed into a box that stabilizes slit paper sheet wound around a core member.

Aspects of the invention are directed toward a carrier (90) for containing a product. The carrier comprises first, second and third connected side panels (16a/16b, 116a/116b, 216a/216b, 316a/316b; 14, 114, 214, 314; 12, 112, 212, 312) which define a three-sided tubular structure having a triangular cross-section. The carrier has a substantially triangular-shaped, crash-bottom-style, bottom wall. Parts (24b/26b, 20b/32, 22b; 124b/126b, 120b/132, 122b; 224b/226b, 220b/232, 222b; 324b/326b, 320b/332, 322b) of the bottom wall are coupled to the first, second and third side panels. The carrier has a mechanical interlocking feature (T1, T2, S1, S2); and a multi-part mechanical locking mechanism. A first top-end closure panel (16a/16b 116a/116b; 215a/215b; 315a/315b) comprises a first part (A1) of said multi-part mechanical locking mechanism. A second top-end closure panel (20a; 120a; 220a; 320a) and a first handle panel (34; 134; 234; 334) coupled thereto, comprise a second part (N2; 334) of the multi-part mechanical locking mechanism; and a third top end closure panel (22a; 122a; 222a; 322a) and a second handle panel (36; 136; 236; 336) coupled thereto, comprise a third part (N1; 336) of said multi-part mechanical locking mechanism.

A tamper-evident coupling system includes a first base portion, a second base portion, a first coupling portion supported by and extending from the first base portion, and a second coupling portion supported by the second base portion and configured for cooperating with the first coupling portion. The first and the second coupling portions are configured for defining an arming condition in which the first and second coupling portions are stably engaged with each other. At least one of the first and the second coupling portions includes a removable portion that is separable from the tamper-evident coupling system upon a first disengagement of the first and second coupling portions following the arming condition to prevent a subsequent coupling between the first and second coupling portions and to show a tampering with the tamper-evident coupling system.

A method of sealing reinforced packages. The method can comprise moving an open-ended package in a downstream direction on a package conveyor by engaging the open-ended package with a chain flight of the package conveyor moving in the downstream direction. The method further can comprise forming a bag with a closed end by engaging at least a seal portion of a tail section of an open-ended tube portion of the open-ended package between the chain flight of the package conveyor and a hot plate positioned adjacent the package conveyor. The chain flight can move with the tail section in the downstream direction relative to the hot plate, which can transfer thermal energy to the tail section to at least partially form a seal along the seal portion in the tail section to at least partially form the closed end of the bag.

An expansion devise includes an unexpanded slit sheet roll that is wound on a paper core that is wider than the slit sheet paper. The paper core is placed into a yoke that holds the paper in position on each side of the unexpanded slit sheet material. An adjustable downward pressure is exerted on the paper core and the paper core exerts pressure on the yoke. As the paper is pulled, this downward pressure creates the friction required to enable the unexpanded slit sheet to be unwind and fed while simultaneously expanding. A blank sheet is formed into a box that stabilizes slit paper sheet wound around a core member.

Unitary blank for forming a container having a body portion with a plurality of fold lines and a cover portion. The body portion with a plurality of fold lines define a plurality of body wall portions, and each body wall portion has an upper edge. A first body wall portion includes a closure tab extending from the upper edge of the first body wall portion. The closure tab includes a closure tab flap portion and a closure tab base portion. The cover portion extends from the upper edge of a second body wall portion. The cover portion includes a cover portion flap score line extending along an upper edge of the cover portion and a release flap. A food container having a body portion and a cover portion is also provided.

A container is provided comprising: first and second side panels, a front panel, a back panel, first and second minor flaps, and first and second major flaps. The first minor flap may be coupled to the first side panel along a lateral edge of the first side panel, and the second minor flap may be coupled to the second side panel along a lateral edge of the second side panel. The first major flap may be coupled to the front panel along a lateral edge of the front panel, and the second major flap coupled to the back panel along a lateral edge of the back panel. The first major flap may comprise a first locking tab capable of engaging with the second major flap when the container is erected and the second major flap may comprise a second locking tab capable of engaging with the first major flap when the container is erected. The first and second minor flaps and the first and second major flaps may be folded inwardly along corresponding fold lines such that the first and second minor flaps are located inwardly from the first and second major flaps.

The present invention is to provide an interlocking structure of a bottom surface portion of a paper box, in which the interlocking force between the bottom surface plates constituting the bottom surface portion of the paper box is improved, thereby improving durability of a bottom surface.

The present invention is to provide an interlocking structure of a bottom surface portion of a paper box, in which the interlocking force between the bottom surface plates constituting the bottom surface portion of the paper box is improved, thereby improving durability of a bottom surface.