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:
Sep. 29, 2009
Filed:
Oct. 01, 2007
Yasunori Yamazaki, Nagoya, JP;
Yasunori Yamazaki, Nagoya, JP;
NGK Insulators, Inc, Nagoya, JP;
Abstract
In a twin-screw extruder including a barrel, which has two screws disposed in parallel in its inside and an opening at one edge, and an extrusion molding die disposed to the opening side of the barrel through a straightening vane and a filter net, the straightening vane includes a first straightening vane and a second straightening vane, the first one has a hole forming region having plural through holes formed in a region whose size and shape are in agreement with the size and the shape of the inner periphery of the opening portion, and the second one has a hole structure whose size and shape of its inner periphery at one opening edge are in agreement with the size and the shape of the hole forming region, and its sectional area is reduced once in a process to the other opening edge and then expanded in a taper shape.