Apparatus for thickening pulp and paper stock
US5021159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1988 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Aug 8, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In apparatus for thickening a suspension of pulp material which includes an endless foraminous belt wrapping two spaced horizontally supported rolls, a special doctor mechanism is provided for transferring thickened pulp from the bare surface of the second roll into a trough mounted in the space bounded by the two rolls and the upper and lower runs of the belt. More specifically, the doctor mechanism includes a rigid doctor blade mounted with its working edge in close but spaced relation with the bare surface of the roll to remove pulp therefrom without contact with the roll surface. Provision is also made for periodically oscillating the blade about a horizontal axis to move its working edge away from and back to its closely spaced working relation with the roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.