Process of producing pulp, for manufacture of fiberboard, in a closed backwater system
US4012279A · kind A · utility
31Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1974 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Dec 30, 1994 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21J1/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Lignocellulose fiber containing chips, preheated with steam liberated from a previous chip defibration, are dewatered and then defibrated in an atmosphere of saturated steam and in the presence of backwater and suspended in backwater to form a pulp suspension whereafter wet sheets are formed from the pulp suspension, water is mechanically removed from the wet sheets and recycled as backwater to be supplied simultaneously, with dewatered chips, to the defibration step and to form a new pulp suspension and said wet sheets are dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.