Corrugated cardboard tube and pallet using the same

Abstract

A corrugated cardboard tube includes a tubular laminar structure of single-lined corrugated cardboard which includes a plurality of strips of single-lined corrugated cardboard spirally wound into a substantially cylindrical configuration to form corresponding single-lined corrugated cardboard layers overlapping and bonded with each other in a radial direction. Each of the strips of single-lined corrugated cardboard is composed of an elongated liner sheet and a corrugated sheet, having a plurality of parallel ridges and furrows, and being spirally turned in a direction perpendicular to the ridges. The corrugated cardboard tube is used as a load bearing member adapted to support a load acting in a direction axially of the corrugated cardboard tube. The corrugated cardboard tube may also be used as leg members of a pallet and, in such case, the corrugated cardboard tubes are bonded at their opposite annular ends to upper and lower tables to complete the pallet.

Dependencies are inferred from the claim text.