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:
Mar. 06, 1984
Filed:
Apr. 07, 1982
Applicant:
Inventors:
Carl S Weisner, Pleasant Hill, CA (US);
David W Raynolds, Fairfield, CA (US);
Assignee:
Polyloom Corporation of America, Dayton, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
4251311 ; 264171 ; 4251335 ; 4251 / ; 4253 / ; 425462 ; 425467 ;
Abstract
An elongated flat die, for extruding parallel streams of different polymers to form a continuous, striped film, includes a body member which houses a replaceable insert. The insert is formed with grooves on at least two abutting surfaces, which, together with the interior surfaces of the body member, define separate, alternating passages through which the polymers flow. Streams of the different polymers flow together in alternating arrangement and exit the die through a variable lip passage.