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:
Jul. 12, 2022
Filed:
Apr. 15, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Fumihiko Yamaya, Mishima, JP;
Hiroki Katayama, Suntou-gun, JP;
Yoshihiko Tanaka, Mishima, JP;
Takatoshi Tanaka, Atami, JP;
Mitsuhiro Ohta, Yokohama, JP;
Atsushi Takata, Yokohama, JP;
Naoki Matsushita, Suntou-gun, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A manufacturing method of a polygonal mirror using a metal mold including a first mold, a second mold, a third mold, and a fourth mold includes a step of forming the molded member by providing the third mold and the fourth mold between the first mold and the second mold in a state in which the third mold and the fourth mold are in contact with each other and then by injecting a resin material into the metal mold, and a step of separating the third mold from the first crossing surface of the molded member in a direction crossing the first crossing surface.