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:
Oct. 01, 1991
Filed:
Jan. 18, 1990
Kenneth J Giljam, Nashville, TN (US);
David C Huseman, Brentwood, TN (US);
Packaging Innovations, Inc., Nashville, TN (US);
Abstract
A method and apparatus for use in extruding a plastic film with integral interlocking closure members. A flat plastic film and integral closure members are extruded through a single die opening. An air knife is used to push the extruded plastic film towards a chill roll and aids in the cooling of the film. The chill roll is rotatably driven and substantially cools the flat portion of the plastic film. Nozzles direct chilled air at the closure members. Cooling shoes are placed in close proximity to the extruded closure member and cool down and solidify the closure members. The cooling shoes are also used for shaping the closure members. The cooling shoes may be located adjacent the chill roll or adjacent a backing plate.