Refiner plates with injector inlet
US6402071B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/306
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A refiner for refining lignocellulosic material having opposed, relatively rotating, rotor and stator refiner plates. The refiner plates each have radially inner and outer edges and an inlet zone extending radially outward from the inner edge. The inlet zone of each refiner plate has a radially inner portion and a radially outer portion. The inner portion of the rotor plate includes a plurality of breaker bars which curve in a direction which is opposite to the direction of rotation of the rotor plate and which extend to a height substantially equal to one-half of the refining gap. The outer portion of the inlet zone of the stator plate has a plurality of dams. Each of the dams has an upper ramp surface extending to an outer end having a curved profile. The outer portion of the inlet zone of the rotor plate and the inner portion of the inlet zone of the stator plate may each have either a smooth surface or a plurality of outwardly extending low profile protrusions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.