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. 20, 2023
Filed:
Oct. 23, 2017
Applicant:
Zeon Corporation, Tokyo, JP;
Inventors:
Assignee:
ZEON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08C 4/00 (2006.01); B29B 13/06 (2006.01); C08F 6/26 (2006.01); B29K 9/00 (2006.01);
U.S. Cl.
CPC ...
C08C 4/00 (2013.01); B29B 13/06 (2013.01); C08F 6/26 (2013.01); B29K 2009/00 (2013.01);
Abstract
An extrusion dryer for a rubbery polymer includes a cylinder equipped with a hopper for injection of the rubbery polymer at one end and a die at the other end. A screw is rotatably arranged inside of the cylinder, the screw having a shaft and a spiral flight formed on an outer surface of the shaft. The shaft includes multiple zones, each including a conveyance section and a compression section. In the zone closest to the die, the outer diameter of the shaft at the conveyance section is smaller than the outer diameter at the compression section.