Ink jet recording apparatus
US4849773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Sep 2, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/175
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A liquid ink composition having a sodium ion concentration between about 0.001 and 0.2% by weight or ink tank formed of resin or synthetic rubber containing between about 10 and 100 ppm of fatty acid or fatty acid derivatives is provided. The liquid composition is useful in every ink tank formed of resin or synthetic rubber containing fatty acid or the derivatives. The ink tank is also useful in despite of sodium ion concentration of ink. Formation of insoluble substances produced to react with sodium ion and fatty acid or the derivatives deteriorates the ink flow to clog the filter in the pass. The low sodium ion concentration of ink, or the low fatty acid or the derivatives concentrations of tank material prevents from forming the insoluble substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.