Patent Number: 6,309,717

Title: Composite paperboard containers of optimized axial strength construction

Abstract: Composite paperboard container constructions, providing optimized axial crush strength, and related properties, are formed of one, two, or three structural paperboard plies that are arranged to form a layered body wall having a cross-section of the construction in the ordered structure, high compression strength paperboard layer.backslash.low compression strength paperboard layer.backslash.high compression strength paperboard layer. Preferably, the container body is formed of one or two structural plies and at least one structural ply is a multiple layer paperboard having both high compression strength and low compression strength paperboard layers.

Inventors: Qiu; Yanping (Middleton, WI), Trevanion; Patrick (Yorkshire, GB), Wang; Yiming (Middleton, WI), Gerhardt; Terry D. (Madison, WI), Cahill; Glenda (Florence, SC), Skiff; Richard (Florence, SC)

Assignee: Sonoco Development, Inc.

International Classification: B32B 29/00 (20060101); B65D 3/22 (20060101); B65D 3/00 (20060101); B65D 3/02 (20060101); D21H 27/30 (20060101); F16L 9/16 (20060101); F16L 9/00 (20060101); D21H 27/10 (20060101); F16L 009/16 (); B32B 009/06 ()

Expiration Date: 10/30/2018