Aqueous gel ink-filled ball point pen
US5993098A · kind A · utility
48Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K7/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Provided is an aqueous gel ink-filled ball point pen having less blobbing and capable of drawing stable lines having vivid color and no uneven written intensity. The aqueous gel ink-filled ball point pen has a ball of a diameter of 0.3 to 2.0 mm at a tip point with an aqueous gel ink having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 1.1 to 4.0 and controlled an ink lay down value according to JIS Standard S6053 to 50 to 200 mg/m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.