Apparatus for treatment of old printed papers with short and long fiber separation
US4915821A · kind A · utility
26Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1987 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Sep 15, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for treating of old printed papers includes a recycling conduit for the thickening waters of a long fiber fraction upstream of the fractionation apparatus to the pulping and pre-purification apparatus, and a reservoir for the recovery of thickening waters of a short fiber fraction and of thickening/washing waters of the long fiber fraction. This reservoir is fed with clean water for starting the installation and is connected with a second reservoir such that overflow from the first reservoir empties into the second reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.