The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2003
Filed:
Dec. 17, 2002
Applicant:
Inventors:
Michael L. Bohn, Rochester, NY (US);
William P. Belias, Pittstord, NY (US);
Assignee:
Pactiv Corporation, Lake Forest, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 3/118 ; B32B 3/120 ;
U.S. Cl.
CPC ...
B32B 3/118 ; B32B 3/120 ;
Abstract
A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.