Roller ball pen for pigmented inks
US7037015B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2005 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Jul 27, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K7/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A free ink roller ball pen for dispensing low viscosity inks containing pigments that are prone to sedimentation. The instrument contains an ink reservoir chamber, a nib chamber provided with a roller ball socket assembly, a pressure equalization overflow chamber for the low viscosity ink, and a special agitation system for the ink reservoir and nib chamber. The agitation system comprises a weight, with a cross section smaller than the interior of the nib chamber, connected to a wire having a diameter smaller than the back inner diameter of the ball socket assembly. The length of the weight and its confinement are selected to provide for a predetermined stroke, on shaking the pen, that sweeps out the internal space of the nib and also the back of the roller ball assembly, to re-disperse any pigment that has precipitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.