Method for purifying ink
US4565638A · kind A · utility
14Cited by
12References
4Claims
0Family size
Inventor
Key dates
| Filing date | Sep 22, 1983 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Sep 22, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Excess or unused ink that is recovered from a printing process and which contains fibrous impurities is purified by mixing the recovered ink with virgin ink, heating the mixture to decrease the viscosity thereof, and then straining and filtering the heated mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.