Ink follower piston for a ball-point pen, and a method of manufacturing the same
US6443647B1 · kind B1 · utility
1Cited by
4References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | May 9, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K7/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A follower piston for a ball-point pen, the piston including an element in the form of a stable gel whose hardness measured by cone penetration lies in the range 100×10−1 mm to 400×10−1 mm, and a method for manufacturing the element in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.