Hollow connected body and packaging material

A corrugated sheet packaging material formed of a single paper or corrugated fiberboard sheet folded into an array of alternating first and second hollow structures extending parallel to the folds in a longitudinal direction, said sheet packaging material having first and second opposing surfaces;

• wherein each of said first and second hollow structures has side walls joined at corners to define closed polygons in cross-section perpendicular to the longitudinal direction;
• wherein each of said first hollow structures has a pair of said side walls meeting at one of said corners and shared in common with adjacent second hollow structures, said one corner defining said first opposing surface;
• and
• wherein each of said second hollow structures has first and second of said side walls meeting at a second of said corners and shared in common with adjacent first hollow structures and at least third and fourth of said side walls extending from said first opposing surface to form protuberances thereon.

A corrugated sheet packaging material formed of a single paper or corrugated fiberboard sheet folded into an array of alternating first and second hollow structures extending parallel to the folds in a longitudinal direction, said sheet packaging material having first and second opposing surfaces;

• wherein each of said first and second hollow structures has at least first, second and third side walls joined at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction;
• wherein each of said first and second hollow structures has its first and second side walls meeting at one of said corners and at least in part shared in common with adjacent ones of said hollow structures;
• wherein third side walls of said first hollow structures are connected together to form said first opposing surface and third side walls of said second hollow structures are connected together to form said second opposing surface;
• and
• wherein each of said first and second side walls has a bending node formed therein for bending of said first and second walls at said bending node responsive to application of a force on said opposing surfaces.

A corrugated sheet packaging cylinder having exterior and interior cylindrical surfaces and formed of a single paper or corrugated fiberboard sheet folded to form first and second hollow structures arranged alternating around the circumference of the cylinder, said hollow structures extending parallel to the central axis of the cylinder in a longitudinal direction,

• wherein each of said first hollow structures has side walls joined at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction, said side walls including a pair of side walls meeting at one of said corners and shared in common with said second hollow structures;
• wherein each of said second hollow structures has side walls joined at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction;
• and
• wherein first side walls of said first hollow structures together define the interior cylindrical surface as having a cross-section which is polygonal and close to circular and first side walls of said second hollow structures together define the exterior cylindrical surface as having a cross-section which is square with chamfered corners.

A channel-shaped corrugated packaging material formed as a sheet of paper or corrugated fiberboard folded into parallel and alternating first and second hollow structures extending in a longitudinal direction, said hollow structures arranged to form a pair of parallel side members connected by a planar member;

• wherein each of said first and second hollow structures has side walls joined at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction;
• wherein each of said first hollow structures has a pair of said side walls meeting at one of said corners and at least in part shared in common with adjacent second hollow structures;
• and
• wherein each of said second hollow structures has first and second of said side walls meeting at a second of said corners and at least in part shared in common with adjacent first hollow structures.

A corrugated packaging material formed of a single sheet of paper or corrugated fiberboard folded into plural linear arrays of parallel alternating first and second hollow structures extending in a longitudinal direction, one of said plural arrays forming a bottom planar member, a second of said plural arrays forming a first side member extending at a right angle from said bottom planar member and a third of said plural arrays forming a second side member extending at a right angle from said bottom planar member and at a right angle from said first side member;

• wherein said bottom planar member and said first and second side members define an interior for said corrugated packaging material;
• and
• wherein each of said first and second hollow structures has side walls joined at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction;
• wherein each of said first hollow structures has a pair of said side walls meeting at one of said corners and at least in part shared in common with adjacent second hollow structures;
• and
• wherein each of said second hollow structures has first and second of said side walls meeting at a second of said corners and at least in part shared in common with adjacent first hollow structures.

A packaging material comprising a corrugated planar member folded into a block structure of superimposed folds, said corrugated planar member being formed of a sheet folded into a linear array of alternating first and second hollow structures extending in parallel to the folds in said sheet and in a longitudinal direction, and said corrugated planar member having first and second opposing surfaces;

• wherein each of said first and second hollow structures has side walls jointed at corners to define a closed polygon in cross-section perpendicular to the longitudinal direction;
• wherein each of said first hollow structures has a pair of said side walls meeting at one of said corners and shared in common with adjacent second hollow structures;
• and
• wherein each of said second hollow structures has first and second of said side walls meeting at a second of said corners and shared in common with adjacent first hollow structures.