Push-button writing instrument with front seal means
US4618280A · kind A · utility
19Cited by
5References
4Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Aug 14, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Aug 14, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/028
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A push-button type writing instrument is constructed of a refill received within a barrel slidably in the axial direction, a writing part receiving mechanism provided at a forward end portion of the refill, and sealing means provided with the writing part receiving mechanism for sealing a writing part. Owing to the provision of the sealing means, the ink of the writing instrument is kept free from evaporation and flow while the writing part is received within the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.