Free-ink type writing instrument
US6517273B2 · kind B2 · utility
7Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Dec 11, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K5/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A free-ink type writing instrument having a temporary ink collector having a sectionally combed configuration, between an ink tank chamber and an writing tip and inside the front barrel, wherein all or part of the gaps between neighboring combed teeth for retaining ink in the temporary ink collector are set equal to 0.15 mm or smaller, and the ink tank is charged with an ink having a surface tension equal to 30 mN/m or lower at 25° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.