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. 20, 1984
Filed:
Apr. 15, 1983
Applicant:
Inventors:
Granville J Hahn, Big Spring, TX (US);
Raleigh N Rutledge, Big Spring, TX (US);
Jackie D Murley, Big Spring, TX (US);
Assignee:
Cosden Technology, Inc., Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
4251311 ; 264171 ; 4251335 ; 425146 ; 4253 / ; 425462 ; 425466 ;
Abstract
Disclosed is a process and apparatus for extrusion of multiple-layer sheeting comprising an improved co-extrusion feedblock and valve plate for laying down co-extruded resin streams onto a main extruded polymeric resin. The new design provides advantageous external control of the layer number as well as a more refined control of layer thicknesses.