Apparatus for the production of thermoplastic mixtures by continuous homogenisation thereof
Abstract
Abstract 1,143,524. Mixing thermoplastics. WERNER& PFLEIDERER. 13 Feb., 1967 [26 March. 1966], No. 6725/67. Heading B1C. In a method of homogenizing a thermoplastics mixture by shearing, the mixture or components are closed at successive points in the treatment zone, the rise in temperature due to treatment being counteracted by a low initial temperature of the next addition. An apparatus comprises cooperating members 2, 2<SP>1</SP> in a common housing, components or mixture being dosed at 4, 5, 6. The dose at each point may be controlled by the temperature at that point or upstream of it to provide a predetermined limiting temperature. Equal or different amounts may be added if a mixture containing differing proportions of a component comprising shearing, upstream additions containing greater proportions of the component.
Inventors
- 👤 Fritsch Rudolf Paul
- 👤 Hartwig H O Kuhner
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |