Apparatus for pulping paper making stock at high consistencies
US4593861A · kind A · utility
32Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Dec 7, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21B1/345
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for pulping paper making stock at high consistencies, e.g. 10 percent to 25 percent solids, includes a cylindrical tub and a rotor constructed and arranged to apply primarily pumping force to the stock which causes it to travel outwardly to and upwardly along the tub wall. This climbing stock is continuously subdivided and directed back into the tub, and a feed screw extending vertically upward from the rotor assures continuous circulation which develops zones of intense hydraulic sheer constituting the major force for effecting the desired defibering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.