Abstract: A packing box with cardboard walls includes a pallet base, four wall assemblies, a top cover, a plurality of fasteners and five cardboard pieces. A horizontally extending female edge is provided on each of the four sides of the pallet base. The right and left sides of each wall assembly are provided with a male edge and a female edge to allow two neighboring wall assemblies to engage with each other. The upper and lower sides of each wall assembly are provided with a male edge, and the male edge on the lower side of each wall assembly may rest on and engage with the corresponding female edge of the pallet base. Each side of the top cover has a downwards extending wall edge and a horizontally extending top cover edge so that the top cover may rest on the four wall assemblies via the four top cover edges and the male edges and that the four wall edges may engage with the inner members of the four male edges of the wall assemblies.

Abstract: The paper made entrainer is formed into a rectangular parallelepiped figure basically comprises a longitudinal framework, a transverse framework, a cylindrical supporting column, and a loading board. It has several advantages namely: easy to assemble and detach with low cost because the component parts are mutually engaged one another by insertion, by adjusting number of frameworks and supporting columns, the entrainer is able to carry many loads of different weight. The structure is made of paper so that the decayed entrainer is possible for recyling.