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:
Aug. 24, 1993
Filed:
Jun. 15, 1992
Takahiro Komatsu, Hamamatsu, JP;
Tetsuo Shimoishi, Hamamatsu, JP;
Teibow Company Limited, Sizuoka, JP;
Abstract
A pen nib preferably for use in a high speed writing, having a coaxial capillary passage for ink. The coaxial passage extends axially in the nib body, and has, in a cross-sectional view, a coaxial portion, a plurality of outer portions and intermediate connecting portions between the coaxial portion and respective outer portions. The coaxial passage partially opens axially at peripheral openings formed in a round or sharped head of the nib, that is the coaxial portion and intermediate portions are all closed axially at the head, and the outer portions are open axially at the peripheral openings formed such that they are arranged at a top surface of the head around the center thereof. The intermediate passage portions may be open radially at the peripheral openings. The nib is made of hard and wear material such as metal, ceramic or thermosetting resin by an injection molding with a subsequent heat treatment. Each peripheral opening is chamfered to give a round edge, and preferably are formed to have a groove following the round edge for guiding and discharging dust from the utmost radially outer edge thereof.