US3357049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder control system
Assignee: Individual
•
Filing: 1965-12-20
•
Granted: 1967-12-12
•
Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Spindler Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:52
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/47; B29C45/50; B29C48/00; B29C48/25; B29C48/92; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/422; B29B7/423; B29B7/58; B29B7/72; B29B7/726; B29B7/728; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92085; B29C2948/92095; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92904; B29C2948/92952; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A SYSTEM FOR CONTROLLING THE FLOW OF MOLTEN PLASTIC THROUGH THE DIE OPENING OF AN EXTRUDER, (1) THE EXTRUDER COMPRISING (A) AN ELONGATED CYLINDRICAL HOUSING HAVING A FEED HOPPER AT ONE END AND AN EXTRUSION DIE WITH AN OPENING AT THE OTHER END, AND (B) AN AXIALLY RECIPROCABLE, ROTATABLE SCREW MOUNTED IN THE HOUSING, A TORPEDO CARRIED BY ONE END OF THE SCREW, A FIXED RING ARRANGED NEAR THE OTHER END OF THE HOUSING, THE RING AND THE TORPEDO DEFINING A CONSTRICTED ANNULAR PASSAGE OF A DIAMETER VARYING WITH THE AXIAL POSITION
Claim 2
Independent Claim
92 words
A SYSTEM FOR CONTROLLING THE FLOW OF MOLTEN PLASTIC THROUGH THE DIE OPENING OF AN EXTRUDER, (1) THE EXTRUDER COMPRISING (A) AN ELONGATED CYLINDRICAL HOUSING HAVING A FEED HOPPER AT ONE END AND AN EXTRUSION DIE WITH AN OPENING AT THE OTHER END, AND (B) AN AXIALLY RECIPROCABLE, ROTATABLE SCREW MOUNTED IN THE HOUSING, A TORPEDO CARRIED BY ONE END OF THE SCREW, A FIXED RING ARRANGED NEAR THE OTHER END OF THE HOUSING, THE RING AND THE TORPEDO DEFINING A CONSTRICTED ANNULAR PASSAGE OF A DIAMETER VARYING WITH THE AXIAL POSITION
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |