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:
Oct. 20, 2015
Filed:
Dec. 18, 2013
Applicant:
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI PENCIL CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B43K 5/04 (2006.01); B43K 7/02 (2006.01); B43K 7/10 (2006.01); B43K 8/03 (2006.01); B43K 8/04 (2006.01); B43K 5/18 (2006.01);
U.S. Cl.
CPC ...
B43K 7/02 (2013.01); B43K 5/04 (2013.01); B43K 5/18 (2013.01); B43K 7/10 (2013.01); B43K 8/03 (2013.01); B43K 8/04 (2013.01);
Abstract
A writing implement that prevents flow of air into an ink tank and prevents writing failure while allowing for productivity. The writing implement includes a writing implement refill having: an ink tank composed of films storing ink; a joint connected to a tip of the ink tank; and a writing tip connected to a tip of the joint. An inner circumferential surface of the tip of the ink tank covers an outer circumferential surface of a rear end of the joint. A covering member of a ring shape covers from outside an area where the tip of the ink tank covers the outer circumferential surface of the rear end of the joint.