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:
Jul. 06, 1976
Filed:
Mar. 29, 1971
Applicant:
Inventor:
Donald F Wiley, Big Spring, TX (US);
Assignee:
Cosden Oil & Chemical Company, Big Spring, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29D / ; B29F / ;
U.S. Cl.
CPC ...
264171 ; 2641 / ; 264D / ;
Abstract
A process is disclosed for producing composite sheeting of polystyrene having a thin protective layer of vinylidene fluoride polymer. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.