Method and apparatus for granulating plastic
US6978956B2 · kind B2 · utility
3Cited by
28References
6Claims
0Family size
Inventor
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Sep 22, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C2018/147
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A granulator has a first coarse cutting stage operating at between 5 and 45 rotations per minute and a second fine cutting stage operating at two to ten times the speed of the first stage. Since granulate exiting the second stage is uniformly divided, the granulator operates independent of a screen. A first cutter stage has cutting segments having blades interspersed with deflector segments about a shaft. Rotation of the shaft urges the blades past a spaced stationary cutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.