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. 17, 2020
Filed:
Mar. 25, 2020
Applicants:
Kotobuki & Co. Ltd., Saitama, JP;
Suhan Corporation, Hoengseong-gun, KR;
Microtip Co., Ltd., Bucheon-si, KR;
Inventor:
Byun Young Jae, Bucheon-si, KR;
Assignees:
KOTOBUKI & CO. LTD., Kawagoe, JP;
SUHAN CORPORATION, Hoengseong, KR;
MICROTIP CO., LTD., Bucheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K 15/02 (2006.01); B43K 15/00 (2006.01); B43K 7/00 (2006.01); B26F 1/44 (2006.01); B21D 53/76 (2006.01);
U.S. Cl.
CPC ...
B43K 15/00 (2013.01); B26F 1/44 (2013.01); B43K 7/00 (2013.01); B21D 53/76 (2013.01);
Abstract
A method for manufacturing a ball pen tip in which a spring for biasing a ball is assembled to the ball pen tip, the method including punching the ball pen tip by a punch from a rear end of the ball pen tip along a central axis direction of the ball pen tip to form a plastic flow ridge formed by a plastic flow upheaving radially inward from an inner peripheral wall surface of the ball pen tip to assemble the spring to the ball pen tip by the plastic flow ridge.