US3175248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater for molding material
Assignee: Individual
•
Filing: 1961-11-27
•
Granted: 1965-03-30
•
Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Gordon C Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:04
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/47; B29C45/53; B29C45/54; B29C45/541; B29C45/72; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/50; B29C48/505; B29C48/51; B29C48/515; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/84; B29C48/845; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A HEATING CYLINDER FOR USE IN THE INJECTION MOLDING OF PLASTIC MATERIAL COMPRISING A HOLLOW BARREL CLOSED AT ONE END AND HAVING AN INLET COMMUNICATING WITH SAID HOLLOW AND ADAPTED TO BE CONNECTED TO A SOURCE OF RELATIVELY COLD PLASTIC MATERIAL, AN OUTLET ADAPTED TO BE CONNECTED TO DIE MEANS, A ROTATABLE HOLLOW SCREW CONVEYOR WITH A HOLLOW PORTION EXTENDING INWARDLY FROM THE DOWNSTREAM END THEREOF IN SAID HOLLOW BARREL, SAID CONVEYOIR EXTENDING INTO SAID HOLLOW SUBSTANTIALLY TO SAID CLOSED END AND HAVING A SPIRAL GROOVE IN THE PERIPHERY THEREOF EXTENDING FROM SAID INLET TOWARD SAID CLOSED END, AN OUTLET TUBE IN SAID HOLLOW SCREW CONVEYOR GENERALLY CONCENTRIC THERETO AND CONNECTED TO SAID OUTLET, SAID TUBE EXTENDING INTO SAID HOLLOW CONVEYOR A SUBSTANTIAL DISTANCE THE INSIDE OF SAID HOLLOW BARREL AND SAID SPIRAL GROOVE IN SAID CONVEYOR COMPRISING A FIRST PASSAGE, THE INSIDE OF SAID HOLLOW SCREW CONVEYOR AND THE OUTSIDE OF SAID TUBE COMPRISING A SECOND PASSAGE ANNULAR IN CROSS SECTION, THE INSIDE OF SAID TUBE COMPRISING A THIRD PASSAGE, SAID FIRST, SECOND, AND THIRD PASSAGES BEING CONNECTED IN SERIES AND HEATING MEANS ON THE OUTSIDE OF SAID HOLLOW BARREL FOR MELTING PLASTIC IN SAID PASSAGES.
Claim 2
Dependent Claim
197 words
A HEATING CYLINDER FOR USE IN THE INJECTION MOLDING OF PLASTIC MATERIAL COMPRISING A HOLLOW BARREL CLOSED AT ONE END AND HAVING AN INLET COMMUNICATING WITH SAID HOLLOW AND ADAPTED TO BE CONNECTED TO A SOURCE OF RELATIVELY COLD PLASTIC MATERIAL, AN OUTLET ADAPTED TO BE CONNECTED TO DIE MEANS, A ROTATABLE HOLLOW SCREW CONVEYOR WITH A HOLLOW PORTION EXTENDING INWARDLY FROM THE DOWNSTREAM END THEREOF IN SAID HOLLOW BARREL, SAID CONVEYOIR EXTENDING INTO SAID HOLLOW SUBSTANTIALLY TO SAID CLOSED END AND HAVING A SPIRAL GROOVE IN THE PERIPHERY THEREOF EXTENDING FROM SAID INLET TOWARD SAID CLOSED END, AN OUTLET TUBE IN SAID HOLLOW SCREW CONVEYOR GENERALLY CONCENTRIC THERETO AND CONNECTED TO SAID OUTLET, SAID TUBE EXTENDING INTO SAID HOLLOW CONVEYOR A SUBSTANTIAL DISTANCE THE INSIDE OF SAID HOLLOW BARREL AND SAID SPIRAL GROOVE IN SAID CONVEYOR COMPRISING A FIRST PASSAGE, THE INSIDE OF SAID HOLLOW SCREW CONVEYOR AND THE OUTSIDE OF SAID TUBE COMPRISING A SECOND PASSAGE ANNULAR IN CROSS SECTION, THE INSIDE OF SAID TUBE COMPRISING A THIRD PASSAGE, SAID FIRST, SECOND, AND THIRD PASSAGES BEING CONNECTED IN SERIES AND HEATING MEANS ON THE OUTSIDE OF SAID HOLLOW BARREL FOR MELTING PLASTIC IN SAID PASSAGES.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |