Patent US2634684A successfully refreshed from Google Patents.
Patent US3215779A successfully refreshed from Google Patents.
Patent US3345690A successfully refreshed from Google Patents.
US3345690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding thermoplastic tubes
Assignee: Individual
•
Filing: 1965-10-21
•
Granted: 1967-10-10
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Hagen Reinold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/04; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/36; B29C48/475; B29C49/42; B29C49/76; B29C49/761; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
235 words
AN APPARATUS FOR PRODUCING TUBULAR BODIES OF SYNTHETIC PLASTIC MATERIAL, COMPRISING PLASTICIZER MEANS HAVING AN OUTLET FOR DISCHARGING A FIRST STREAM OF PLASTICIZED MATERIAL; A TUBULAR HOUSING MEMBER HAVING A LATERAL INLET FOR RECEIVING MATERIAL FROM SAID OUTLET; A MANDREL MEMBER RECEIVED IN AND DEFINING WITH SAID HOUSING MEMBER AN ANNULAR CHAMBER SPACED FROM SAID INLET AND A PAIR OF MIRROR SYMMETRICAL RECESSES EACH COMMUNICATING WITH SAID INLET AND EACH DIVERGING CIRCUMFERENTIALLY OF SAID MANDREL MEMBER IN A DIRECTION TOWARD SAID CHAMBER SO THAT THE MATERIAL ENTERING SAID RECESSES FORMS TWO SECONDARY STREAMS WHICH EXPAND LATERALLY AND MERGE IN SAID CHAMBER TO FORM A SINGLE ANNULAR STREAM, SAID RECESSES BEING MIRROR SYMMETRICAL WITH REFERENCE TO A PLANE WHICH INCLUDES THE AXIS OF SAID MANDREL MEMBER AND HALVES SAID INLET; AN EXTRUSION DIE CONNECTED WITH SAID MEMBERS AND DEFINING AN ANNULAR EXTRUSION ORIFICE IN COMMUNICATION WITH SAID CHAMBER SO THAT THE MATERIAL OF THE ANNULAR STREAM ISSUING FROM SAID ORIFICE FORMS TUBULAR PARISONS, SAID HOUSING MEMBER COMPRISING A FIRST SLEEVE WHICH SURROUNDS SAID CHAMBER AND A SECOND SLEEVE SPACEDLY SURROUNDING SAID FIRST SLEEVE AND DEFINING THEREWITH AN ANNULAR COMPARTMENT WHICH COMMUNICATES WITH THE DISCHARGE END OF SAID CHAMBER AND WITH THE INTAKE END OF SAID ORIFICE SO THAT THE MATERIAL ISSUING FROM SAID CHAMBER ENTERS SAID ORIFICE VIA SAID COMPARTMENT; AND EJECTOR MEANS FOR INTERMITTENTLY EXPELLING PLASTICIZED MATERIAL FROM SAID COMPARTMENT INTO AND THROUGH SAID ORIFICE.
Claim 2
Independent Claim
235 words
AN APPARATUS FOR PRODUCING TUBULAR BODIES OF SYNTHETIC PLASTIC MATERIAL, COMPRISING PLASTICIZER MEANS HAVING AN OUTLET FOR DISCHARGING A FIRST STREAM OF PLASTICIZED MATERIAL; A TUBULAR HOUSING MEMBER HAVING A LATERAL INLET FOR RECEIVING MATERIAL FROM SAID OUTLET; A MANDREL MEMBER RECEIVED IN AND DEFINING WITH SAID HOUSING MEMBER AN ANNULAR CHAMBER SPACED FROM SAID INLET AND A PAIR OF MIRROR SYMMETRICAL RECESSES EACH COMMUNICATING WITH SAID INLET AND EACH DIVERGING CIRCUMFERENTIALLY OF SAID MANDREL MEMBER IN A DIRECTION TOWARD SAID CHAMBER SO THAT THE MATERIAL ENTERING SAID RECESSES FORMS TWO SECONDARY STREAMS WHICH EXPAND LATERALLY AND MERGE IN SAID CHAMBER TO FORM A SINGLE ANNULAR STREAM, SAID RECESSES BEING MIRROR SYMMETRICAL WITH REFERENCE TO A PLANE WHICH INCLUDES THE AXIS OF SAID MANDREL MEMBER AND HALVES SAID INLET; AN EXTRUSION DIE CONNECTED WITH SAID MEMBERS AND DEFINING AN ANNULAR EXTRUSION ORIFICE IN COMMUNICATION WITH SAID CHAMBER SO THAT THE MATERIAL OF THE ANNULAR STREAM ISSUING FROM SAID ORIFICE FORMS TUBULAR PARISONS, SAID HOUSING MEMBER COMPRISING A FIRST SLEEVE WHICH SURROUNDS SAID CHAMBER AND A SECOND SLEEVE SPACEDLY SURROUNDING SAID FIRST SLEEVE AND DEFINING THEREWITH AN ANNULAR COMPARTMENT WHICH COMMUNICATES WITH THE DISCHARGE END OF SAID CHAMBER AND WITH THE INTAKE END OF SAID ORIFICE SO THAT THE MATERIAL ISSUING FROM SAID CHAMBER ENTERS SAID ORIFICE VIA SAID COMPARTMENT; AND EJECTOR MEANS FOR INTERMITTENTLY EXPELLING PLASTICIZED MATERIAL FROM SAID COMPARTMENT INTO AND THROUGH SAID ORIFICE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |