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:
May. 25, 2021
Filed:
Oct. 13, 2017
Nakata Engineering Co., Ltd., Kobe, JP;
Naoyasu Nakao, Kobe, JP;
NAKATA ENGINEERING CO., LTD., Kobe, JP;
Abstract
To solve problems of complication and malfunction of the device's structure, an increase in the process time, and malfunction caused by catching of a front end portion of a bead apex rubber. A bead apex rubber forming method comprises a forming step P, a connecting space opening step P, a connecting space closing step P, and a connecting step P. In a rear closed state R of a molding chamber, the forming step Pinjects unvulcanized rubber G while a bead core A is being rotated, and forms a bead apex rubber B having a front end portion Bf. when the front end portion Bf approaches a rear shutter part, the connecting space opening step Premoves a second lateral surface Stogether with the rear shutter part, and forms, between the front end portion Bf and a rear end portion Br, a connecting space J whose second side surface Sside is opened. The connecting space closing step Pcloses the connecting spaceby disposing a third lateral surface Sextending between the rear end portion Br and the front end portion Bf. The connecting step Pinjects the unvulcanized rubber into the connecting space J closed, and connects between the rear end portion Br and the front end portion Bf integrally.