Method for reclaiming waste ink
US4778604A · kind A · utility
7Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 24, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/287
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method for reclaiming waste printing ink is provided that requires no dilution nor blending with virgin ink wherein substantially all entrained water and solvent contamination is removed in a vacuum distillation step. Solid impurities are removed via a subsequent filtration method that leaves the ink's pigment content substantially undiminished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.