Marking instrument with sealable diaphragm
US5823697A · kind A · utility
15Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1995 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jun 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K5/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A marking instrument, e.g. a felt tip marker, has a retractable marking tip (4) carried by a marker unit (5) housed within the barrel, and a rolling diaphragm (10) connecting between the marker unit and barrel to form a sealed envelope around the tip (4) when the tip is retracted. Upon retraction of the tip the marker unit rotates to twist the diaphragm and close the envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.