Extruder with temperature control
US4376623A · kind A · utility
4Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1981 |
| Grant date | Mar 15, 1983 |
| Priority date | — |
| Expiry date | Oct 8, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92895
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic material extruder having a barrel and an outer sheath with heating and cooling means in the outer sheath is disclosed, together with means for maintaining the temperature of the inner barrel, including two temperature sensing devices, one on the barrel and one on the other sheath, the sensing devices connected to control circuitry which actuates the heating and cooling means to maintain a temperature gradient between the two sensors by sensing the temperature change from the barrel and adjusting the set point of the sensing device on the sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.