Marking instruments
US6135660A · kind A · utility
17Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1999 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Sep 10, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A retractable marking instrument has a seal arrangement for sealing the marking tip (3) when it is retracted within the barrel. The seal arrangement comprises a sealing element (6) shaped as a torus which rolls between the barrel (1) of the instrument and a refill unit (2) carrying the marking tip (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.