Method of manufacturing ink follower for water-base ballpoint pens
US6227738A · kind A · utility
2Cited by
10References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Nov 26, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K7/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Lot-to-lot or time-dependent instability in quality of the known ink follower for water-base ballpoint pens is overcome. Particulate silica, or organic-treated clay is kneaded as thickener with base oil to prepare gel matter. The gel matter is pressurized to eliminate fine bubbles to yield ink follower for water-base ballpoint pens. The pressurization is preferably performed at 2 atm or higher. The elimination of the bubbles is more effective when the ink follower is, under pressurization, stirred and/or heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.