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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.:

US 11752682 B1

PDFFull Text
Date of Patent:
Sep. 12, 2023

Filed:

Feb. 03, 2021

Extruder screw having paths within the screw, extruder, and extrusion method

Applicants:

Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;

Hsp Technologies Inc., Ibaraki, JP;

Inventors:

Akiyoshi Kobayashi, Fuji, JP;

Shigeyuki Fujii, Numazu, JP;

Takafumi Sameshima, Mishima, JP;

Hiroshi Shimizu, Tsukuba, JP;

Assignees:

Shibaura Machine Co., Ltd., Tokyo, JP;

HSP Technologies Inc., Ibaraki, JP;

Attorney:

DLA PIPER LLP US

Primary Examiner:

Charles Cooley

Int. Cl.
CPC ...
B29C 48/51 (2019.01); B29C 48/67 (2019.01); B29B 7/48 (2006.01); B29B 7/42 (2006.01); B29B 7/74 (2006.01); B29B 7/84 (2006.01); B29B 7/82 (2006.01); B29C 48/57 (2019.01); B29C 48/25 (2019.01); B29C 48/54 (2019.01); B29C 48/80 (2019.01); B29C 48/72 (2019.01); B29C 48/76 (2019.01); B29C 48/55 (2019.01); B29C 48/40 (2019.01); B29C 48/03 (2019.01); B29C 48/385 (2019.01); B29K 33/00 (2006.01); B29K 69/00 (2006.01);
U.S. Cl.
CPC ...
B29C 48/51 (2019.02); B29B 7/426 (2013.01); B29B 7/429 (2013.01); B29B 7/483 (2013.01); B29B 7/484 (2013.01); B29B 7/487 (2013.01); B29B 7/489 (2013.01); B29B 7/7461 (2013.01); B29B 7/7485 (2013.01); B29B 7/845 (2013.01); B29C 48/67 (2019.02); B29B 7/82 (2013.01); B29C 48/03 (2019.02); B29C 48/2564 (2019.02); B29C 48/2565 (2019.02); B29C 48/385 (2019.02); B29C 48/402 (2019.02); B29C 48/54 (2019.02); B29C 48/55 (2019.02); B29C 48/57 (2019.02); B29C 48/725 (2019.02); B29C 48/763 (2019.02); B29C 48/767 (2019.02); B29C 48/83 (2019.02); B29K 2033/12 (2013.01); B29K 2069/00 (2013.01);
Abstract

An extruder screw includes a screw main body, conveyance portions, barrier portions, and paths. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position on an upstream side in the conveyance direction in the conveyance portions in which the entrance is opened.

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