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:
Jan. 07, 2025
Filed:
Oct. 07, 2021
Applicant:
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B43K 8/06 (2006.01); B43K 1/12 (2006.01); B43K 27/02 (2006.01); B43K 27/04 (2006.01); B43K 27/08 (2006.01);
U.S. Cl.
CPC ...
B43K 1/12 (2013.01); B43K 8/06 (2013.01); B43K 27/02 (2013.01); B43K 27/04 (2013.01); B43K 27/08 (2013.01);
Abstract
This application is related to a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.