Writing tool
US5716152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1997 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Feb 11, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
On both cap and tubular sheath are formed sealing fit portions for sealing between a writing tip and a front-end opening of the tubular sheath and also formed override fit portions for preventing dislodgement of the cap from the tubular sheath in such a manner that their sealing fit motion and override fit motion start simultaneously at the time of mounting of the cap, whereby the loading on a finger tip in the course of mounting the cap is only once. The outer surface of the cap is integrally provided with a clip which is wider than a connecting leg portion for connection with the cap and which defines an air flow gap extending from the clip head including the connecting leg portion up to the opening portion. Further, on both sides of the connecting leg portion are formed longitudinal grooves extending continuously in parallel from the head portion toward the opening portion so that even in the event of swallowing the cap there can be ensured a wider and fully sufficient air flow area with more safety by the air flow gap formed between the outer surface of the cap and the clip and also by the two longitudinal grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.