Patent Number: 6,254,820

Title: Multi-layer laminated preform and method of its manufacture

Abstract: A blank (2) is molded for the manufacture of a multi-layer preform (1). The blank possesses protrusions (5). After the protrusions (5) have been brought to a plasticized state under the action of heat, those surfaces that contain protrusions (5) are covered by a layer of plasticized material. The blank (2) becomes connected to the layer (6) in the area of the protrusions (5). After cooling of the preform created from the blank (2) and the layer (6), the blank (2) will be connected with the layer (6) by means of microweld positions (7) in the area of the said protrusions (5). With that, delamination of the preform (1) during further processing or use will be effectively prevented.

Inventors: Cornell; Stephen W. (Naperville, IL)

Assignee: Crown Cork & Seal Technologies Corporation

International Classification: B32B 7/04 (20060101); B29C 37/00 (20060101); B29C 65/14 (20060101); B29C 45/16 (20060101); B29C 49/00 (20060101); B29C 49/22 (20060101); B29C 35/04 (20060101); B29C 35/08 (20060101); B29C 35/12 (20060101); B29C 35/02 (20060101); B29C 59/10 (20060101); B29C 59/00 (20060101); B29C 59/02 (20060101); B29C 049/06 (); B29C 049/22 ()

Expiration Date: 07/03/2018