Cap for writing implement with air vent and guide
US5203637A · kind A · utility
6Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1992 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Jan 28, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7252
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A cap for a writing implement comprises an outer cap having open top and bottom ends with an inner cap having at its top a closed end and at its bottom an open end and coaxially connected to the outer cap by means of a plurality of radially extending ribs to define openings between the outer and inner caps. Flange elements are disposed below the openings for preventing the writing tip from entering the openings and guiding it toward the inner cap, the flange opening elements being circumferentially spaced apart from one another by means of slits in alignment with the ribs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.