Pen nib of a writing instrument
US5238320A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jun 15, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/003
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.