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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.:

US 10350806 B1

PDFFull Text
Date of Patent:
Jul. 16, 2019

Filed:

Mar. 21, 2016

Apparatus and method for forming a polymeric web

Applicant:

Poly-america, L.p., Grand Prairie, TX (US);

Inventors:

Gregory James Wood, Carrollton, TX (US);

Brad A. Cobler, Irving, TX (US);

Assignee:

Poly-America, L.P., Grand Prairie, TX (US);

Attorneys:

Daniel J. Layden

Brandon J. Lee

Primary Examiner:

Monica A Huson

Assistant Examiner:

Kelsey C Grace

Int. Cl.
CPC ...
B29C 48/08 (2019.01); B29C 48/25 (2019.01); B29C 48/30 (2019.01); B29C 48/025 (2019.01); B29C 48/32 (2019.01); B29C 48/335 (2019.01); B29C 48/88 (2019.01); B29L 7/00 (2006.01); B29L 9/00 (2006.01); B29C 48/10 (2019.01); B29C 48/00 (2019.01); B29C 48/17 (2019.01); B29C 48/21 (2019.01); B29C 48/36 (2019.01); B29C 48/375 (2019.01); B29C 48/70 (2019.01);
U.S. Cl.
CPC ...
B29C 48/08 (2019.02); B29C 48/0255 (2019.02); B29C 48/25 (2019.02); B29C 48/30 (2019.02); B29C 48/32 (2019.02); B29C 48/335 (2019.02); B29C 48/912 (2019.02); B29C 48/0015 (2019.02); B29C 48/0018 (2019.02); B29C 48/10 (2019.02); B29C 48/17 (2019.02); B29C 48/21 (2019.02); B29C 48/362 (2019.02); B29C 48/387 (2019.02); B29C 48/70 (2019.02); B29K 2023/04 (2013.01); B29L 2007/008 (2013.01); B29L 2009/00 (2013.01);
Abstract

The present invention is directed to an apparatus for forming a multi-layer web formed from at least two polymeric film tubes in intimate contact with each other but not bonded to each other. The apparatus and method includes the use of a blown film extrusion die that extrudes two separate blown film polymeric tubes via two separate annular die lips. A fluid cooling system applies cooling fluid across a plurality of surfaces of the two blown film tubes. One of the die lips may be at a different height from the other die lip. The frost line of one blown film tube may be at a different height from the other blown film tube.

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