Inventors:
William C. Johnston - Puyallup WA, US
Assignee:
Weyerhaeuser Co. - Federal Way WA
International Classification:
B65D 3/00, B65D 81/38, B31B 1/00
Abstract:
A container such as a paper cup is formed from a thick paperboard blank. The blank has a predetermined thickness and has a top edge, side edges, and a bottom edge. The regions adjacent at least one, and preferably all, of the top edge and first and second side edges are compressed along the length thereof. When the regions adjacent the side edges are overlapped, a reduced thickness side seam is formed. When the compressed region adjacent the top edge is curled to form the upper lip, a lip of lesser thickness is formed than otherwise would be formed from the paperboard material.