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. 12, 2024
Filed:
Dec. 24, 2019
The Japan Steel Works, Ltd., Tokyo, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
The interior of a heating cylinder () is divided into a first stage () and a second stage () due to the shape of a screw (). A first compression zone in which a resin is compressed is formed in the first stage (). A starvation zone () in which an inert gas is injected and a second compression zone in which the resin is compressed are formed in the second stage (). A barrier flight () that is obtained by combining a main flight () and a sub-flight () having a greater lead angle than the main flight is provided to a section of the screw (), said section corresponding to the first compression zone. A multiple flight is provided to another section of the screw (), said section corresponding to the second stage ().