US3189941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous extrusion of composite bodies of plastic material
Assignee: Reifenhauser KG
•
Filing: 1962-07-19
•
Granted: 1965-06-22
•
Expires: 1982-07-19
Abstract
No abstract record available.
Inventors
- 👤 Reifenhauser Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:54
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/22; B29C48/00; B29C48/03; B29C48/07; B29C48/25; B29C48/30; B29C48/304; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
FOR THE CONTINUOUS EXTRUSION OF SHAPED BODIES, PARTICULARLY PLATE-LIKE CONSTRUCTION ELEMENTS HAVING AN EXTRUDED FOAMED SOUND AND HEAT INSULATING CORE AND A SURROUNDING THERMOPLASTIC SYNTHETIC PLATIC SHELL, APPARATUS COMPRISING: AN EXTRUCION HEAD; A SEPARATE CORE MATERIAL EXTRUSION NOZZLE MEANS DISPOSED IN SAID EXTRUSION HEAD; SLIT NOZZLE MEANS IN THE HEAD CONCENTRICALLY SURROUNDING THE FIRST MEANS AND HAVING A FLAT PRISMATIC CROSS SECTION FOR THE EXTRUSION OF A HOLLOW BODY AS THE SAID SHELL; SAID APPARATUS ADAPTED FOR SIMULTANEOUS DISCHARGE OF THE SHELL AND CORE MATERIALS; A SIZING DEVICE DISPOSED IMMEDIATELY BEYOND SAID NOZZLE MEANS ADAPTED TO APPLY A VACUUM ON THE EXTERNAL SURFACE OF A HOLLOW BODY ISSUING FROM THE EXTRUSION
Claim 2
Dependent Claim
111 words
FOR THE CONTINUOUS EXTRUSION OF SHAPED BODIES, PARTICULARLY PLATE-LIKE CONSTRUCTION ELEMENTS HAVING AN EXTRUDED FOAMED SOUND AND HEAT INSULATING CORE AND A SURROUNDING THERMOPLASTIC SYNTHETIC PLATIC SHELL, APPARATUS COMPRISING: AN EXTRUCION HEAD; A SEPARATE CORE MATERIAL EXTRUSION NOZZLE MEANS DISPOSED IN SAID EXTRUSION HEAD; SLIT NOZZLE MEANS IN THE HEAD CONCENTRICALLY SURROUNDING THE FIRST MEANS AND HAVING A FLAT PRISMATIC CROSS SECTION FOR THE EXTRUSION OF A HOLLOW BODY AS THE SAID SHELL; SAID APPARATUS ADAPTED FOR SIMULTANEOUS DISCHARGE OF THE SHELL AND CORE MATERIALS; A SIZING DEVICE DISPOSED IMMEDIATELY BEYOND SAID NOZZLE MEANS ADAPTED TO APPLY A VACUUM ON THE EXTERNAL SURFACE OF A HOLLOW BODY ISSUING FROM THE EXTRUSION
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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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |