Automatic particle-size analyzer with divided drum
US4797204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1988 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Mar 14, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B13/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for automatic screen analysis of a granular material in which the material is screened from a polygonal drum which is divided crosswise into at least two chambers by a transverse partition. A first chamber has progressively coarser screens on each of its faces except one, which has a downward slanting ramp for transferring the sample into a second chamber. Particles are transferred or chuted into the second chamber after they have been screened on all the screens of the first chamber. The second chamber has screens progressively coarser than those in the first chamber, for making more cuts. This construction increases the number of graded screening surfaces available without requiring greater drum length or more sides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.