Refiner plate with variable pitch
US5893525A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C7/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A refiner plate for the face of a refiner disc comprising a plurality of refiner segments arranged side-by-side on the face of the disc to form a substantially annular refining region. Each refiner segment has an inner refining zone for receiving the material to be refined and an outer refining zone. The outer refining zone has a plurality of radially disposed bars defining an top surface and a plurality of radially disposed channels disposed intermediate the bars defining a lower base surface. At least one of the top surfaces has at least one radially extending groove defining a pair of blades and an intermediate base surface at the bottom of the groove. The intermediate base surface is positioned at a height intermediate the top surface and the lower base surface. The width of the grooves are narrower than the width of the channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.