Direct liquid type of writing tool
US10569595B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2016 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Jul 31, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention is a direct liquid type of writing tool including a pen tip; a columnar ink absorbent body connected to a rear end of the pen tip; an ink tank arranged on the ink absorbent body; and a plurality of communicating tubes for connecting the absorbent body and the ink tank. A front end of each of the communicating tubes is located in the ink absorbent body, and has a sloped surface facing an outer periphery side of the absorbent body. Each of the communicating tubes has an opening in the sloped surface at the front end and each has a tip end region adjacent to the opening and extending more frontward than the opening, and the tip end region forms a pressing part configured to press inside of the absorbent body when each of the tubes is inserted frontward from a rear end of the absorbent body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.