Triple channel wave screw
US5219590A · kind A · utility
9Cited by
18References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jun 13, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plasticating apparatus having a barrel and a screw rotatably disposed therein. The screw has a mixing section including a helical conveying flight to form a helical passage for transporting resinous material along the screw. The mixing section further includes two helical divider flights, each spaced from the conveying flight to divide the helical passage into three channels of varying cyclic depth in the helical direction of the channels. The portions of minimum depth of the channels define wave crests which are helically displaced from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.