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:
Jun. 04, 2019
Filed:
Sep. 01, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Takayuki Hori, Kawasaki, JP;
Masaaki Takahashi, Yokohama, JP;
Masayuki Morohashi, Kawasaki, JP;
Akira Yane, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for producing an electrically conductive seamless tube includes (1) preparing an electrically conductive resin composition containing a thermoplastic resin and an electrically conductive filler, (2) preparing a cylindrical extruding die including a cylindrical slit, at least one circumferential distribution channel communicating with the slit and distributing the resin composition that is plasticized in a circumferential direction of the slit, and at least one lead-in path that leads the plasticized resin composition into the circumferential distribution channel, the lead-in path containing a line mixer; (3) introducing the plasticized resin composition into the lead-in path toward the circumferential distribution channel; (4) introducing the plasticized resin composition flowing through the lead-in path into the circumferential distribution channel toward the slit; and (5) introducing the resin composition flowing through the circumferential distribution channel into the slit and extruding the resin composition from an outlet of the slit into a cylindrical shape.