Apparatus and method for manufacturing wood pulp by grinding wood block material
US4017356A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27L11/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved apparatus and method for manufacturing ground wood pulp from ligno-cellulose containing wood block material by forcing the block material to be ground against the end surface of a rotatably mounted grinding disc which has projecting grinding means in the shape of elevations or ridges located on the disc end surface which define grooves directed towards the end surface circumference. The apparatus includes a pressure plate for pressing the block material along a longitudinal side against the disc end surface with the fibers directed outwardly from the center of the grinding disc and toward the periphery of circumference of the disc while the fibers are separated. In this manner the fibers are oriented in the same direction as the edges of the elevations or ridges which carry the fibers radially outward and the elevation edges engage the block fibers under a movement component which is transverse to the longitudinal direction of the fibers. The elevations may be straight or radial ridges or bars arranged along the radii of the end surface. Increased fiber releasing capacity and delivery of pulp of greater uniformity and improved quality can be obtained by this apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.