Pen tip structure
US4842433A · kind A · utility
8Cited by
8References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Jun 17, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/20
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pen tip structure for a ball point includes a ball socketed between a pipe tip and the end of an inner core, the end of the inner core having a flat center surface for supporting the ball and an annular lip which flares outwardly from the flat center surface to create a capillary gap between the ball and the pipe tip. Ink is supplied to the ball from a capillary ink flow channel between the inner core and the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.