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. 28, 2014
Filed:
Sep. 14, 2011
Kyohei Yata, Hiroshima, JP;
Seiji Takamoto, Hiroshima, JP;
Fumio Kobayashi, Hiroshima, JP;
Shigeki Inoue, Hiroshima, JP;
Kyohei Yata, Hiroshima, JP;
Seiji Takamoto, Hiroshima, JP;
Fumio Kobayashi, Hiroshima, JP;
Shigeki Inoue, Hiroshima, JP;
The Japan Steel Works, Ltd., Tokyo, JP;
Abstract
An object of the invention is to improve capacity of process and not require a vent portion by an upper polygonal groove and a transition portion provided to a transport cylinder. A plastic extrusion method and apparatus according to the invention is a method and a configuration, in which an upper polygonal groove and a transition portion are integrally or separately provided to a transport cylinder so as to increase a frictional coefficient of an inner wall of the cylinder, to increase transport efficiency of a plastic raw material by a screw, and to allow at least gas, etc., pass toward a hopper side without using a vent portion.