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:
Oct. 12, 1976
Filed:
Sep. 23, 1974
Applicant:
Inventor:
Kun Sup Hyun, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29F / ;
U.S. Cl.
CPC ...
264 51 ; 264 53 ; 264 54 ; 2642 / ; 264280 ; 264295 ; 264321 ; 264339 ;
Abstract
Foamed shapes having an elongate cross-sectional configuration are prepared extruding with the major axis of the cross-sectional configuration of the die opening in a generally vertical plane, passing the extrudate to a shaping device having the desired elongate cross-sectional configuration which has its major axis in a generally horizontal plane. Improved extrusion rates are obtainable and the amount of blowing agent required to provide a given degree of expansion is reduced when compared to extrusion with the major axis of the extrusion die disposed in a horizontal plane.