Screen plate for screening of a pulp suspension and method to separate the same
US6284145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1998 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Dec 9, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D5/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A screen plate (1) for screening of pulp suspensions, comprises a number of elongated at least partially curved screen slots (3). According to the invention every screen slot has a width which is maximally 0.8 mm, and the screen slots bend in such a way that a straight rod, which has a breadth which is less than the width of the screen slot and the length which is 5 mm, is prevented from passing through the screen slot, when the rod extends along the screen plate, independently of how this rod is oriented in relation to the screen slot. At that elongated stiff shives may be separated more efficiently by means of the screen plate. This screen plate may also be used for separating a pulp suspension into a first fraction comprising comparatively stiff fibers and a second fraction comprising comparatively flexible fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.