Opening and closing device for retractable nib fountain pen
US4560298A · kind A · utility
13Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1982 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Nov 12, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K5/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A retractable fountain pen employs a cover plate rotatable about a supporting tube by means of a spring to sealingly contact the tapered front end of a cylindrical head portion to close off a central passageway therein. The tube prevents excess deformation of the resilient tapered front end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.