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. 07, 2006
Filed:
Jul. 02, 2004
Toshiaki Nagai, Yokohama, JP;
Mikiyasu Masaki, Yokohoma, JP;
Shigejiro Yamaguchi, Yokohama, JP;
Yamaguchi Mfg. Works, Ltd., Kanagawa, JP;
Abstract
A spiral die assembly can obtain a homogeneous pipe body, an inflation film with/without drawing and a functional film by dispersing molten resin homogeneously, and the spiral die assembly is capable of being applied to various molten resins and extruding conditions. The spiral die assembly comprises a main bodyof said spiral die assembly, a mandrelhaving a spiral groovearound its outer surface inserted on the inside of the main body and a rotatable ringhaving a desired width fitted along the outer surface of the spiral grooveand fitted in a portion of a die cylinder which forms the inner surface of the main bodyin a range corresponding to both ends of the spiral groove