Preheating apparatus for an extruder
US5750158A · kind A · utility
8Cited by
21References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/039
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for heating and blending thermoplastic material prior to delivering the material into the barrel of an extruder has an elongated housing which contains two intermeshing feed screws that are driven to rotate in the same direction. Controlled heating is provided by electric band heaters which encircle the exterior of the housing, and electric cartridge heating elements fitted into aluminum cores that are received by an axial bore in each of the feed screws.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.