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:
Jun. 27, 1989
Filed:
Jun. 30, 1987
Gordon E Gould, Newark, OH (US);
Robert A Luecke, Newark, OH (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A process and apparatus are disclosed for reducing the carbonization of a thermally degradable barrier material during the extrusion of a multilayer laminate. A core extrudate of barrier material is extruded with a core extruder. A preencapsulation means is provided adjacent the downstream end of the core extruder. The core extrudate is joined with a preencapsular extrudate in the preencapsulation means in a coaxial relation wherein the preencapsular extrudate is disposed radially outwardly of the core extrudate. The preencapsulated core extrudate is then directed to a feed block and coextrusion die for incorporation in the coextruded multilayer film.