Patent ID: 7076857
Filing Date: 2006-07-18
Classification: B29C,B29D,Y10T

Abstract:
1. A method for making foamed products, comprising the steps of: (a) foaming a foamable blank at an elevated temperature; (b) forming a plurality of blind holes in said blank which has been foamed, by using a mold having a plurality of protrusions, wherein said protrusions press said blank to form said blind holes and to create densified depths respectively in said blind holes; (c) cross-cutting said blank along a plane which extends across said blind holes so that said blank is divided into a first foam sheet having a plurality of through holes and a second foam sheet having a plurality of blind bores with said densified depths; and (d) heating said second foam sheet to expand and to form said densified depths into projections protruding from said second foam sheet.