Writing instrument tip
US4551038A · kind A · utility
18Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Apr 25, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/06
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing tip or nib for a reservoir pen is provided comprising a thin-walled hollow element (10), e.g. of metal, having an outwardly convex end wall portion (12) defining the writing surface of the tip, and several perforations (13) extending through the end wall portion for conducting ink directly to the writing surface from inside the tip. The perforations may be at least 8 in number and measure 50-200 microns across. The outer edges of the perforations are smoothly rounded at the writing surface and the perforations taper gradually inwardly from the writing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.