Method of deinking laser printed wastepaper
US5413675A · kind A · utility
16Cited by
18References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | May 6, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for deinking wastepaper printed with heat fused inks to provide a source of deinked paper which can be reused or repulped and converted into a recycled paper product comprises immersing the wastepaper in a non-aqueous solvent bath containing a solvent capable of dissolving the binder component of the ink, and subjecting the wastepaper to low frequency ultrasound energy to separate the ink particles from the wastepaper. The separated ink particles may be collected magnetically or otherwise and the excess solvent recovered and reintroduced into the solvent bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.