Patent US3204293A successfully refreshed from Google Patents.
US3204293A
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US
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Apparatus for molding hollow tubular articles
Assignee: Primerica Inc
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Filing: 1962-09-27
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Granted: 1965-09-07
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Brownson De Witt Martin
- 👤 Polka Eugen Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:39
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/36; B29K; B29K2105/00; B29K2105/25; B29K2105/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
APPARATUS FOR MOLDING HOLLOW TUBULAR ARTICLES OF PLASTIC MATERIAL COMPRISING A MOLD SHELL, A CORE PIN ASSEMBLY SUPPORTED CONCENTRICALLY WITHIN AND ENCLOSING ONE END OF SAID SHELL, SAID SHELL AND SAID CORE PIN DEFINING AN ANNULAR SPACE CLOSED AT ONE END, AND AN INJECTION NOZZLE COMMUNICABLE WITH A MOLTEN MASS OF SAID MATERIAL UNDER PRESSURER AND BEING RELATIVELY MOVEABLE INTO CLOSING ENGAGEMENT WITH SAID SHELL AT ITS OPPOSITE END TO A POSITION SPACED FROM SID CORE PIN TO DEFINE AND END SPACE, SAID SPACES THEREBY PROVIDING A UNIFIED CAVITY FOR SHAPING THE INTEGRAL SIDE AND END WALLS OF THE ARTICLES TO BE MOLDED, SAID NOZZLE HAVING A DIVERGING ANNULAR FLOW PATH OPENING DIRECTLY INTO SAID ANNULAR SPACE AND CONCENTRICALLY OF SAID CORE PIN TO INJECT A CHARGE OF MOLTEN PLASTIC FROM SAID MASS IN A DIVERGING ANNULAR PATTERN INTO SAID CAVITY.
Claim 2
Dependent Claim
141 words
APPARATUS FOR MOLDING HOLLOW TUBULAR ARTICLES OF PLASTIC MATERIAL COMPRISING A MOLD SHELL, A CORE PIN ASSEMBLY SUPPORTED CONCENTRICALLY WITHIN AND ENCLOSING ONE END OF SAID SHELL, SAID SHELL AND SAID CORE PIN DEFINING AN ANNULAR SPACE CLOSED AT ONE END, AND AN INJECTION NOZZLE COMMUNICABLE WITH A MOLTEN MASS OF SAID MATERIAL UNDER PRESSURER AND BEING RELATIVELY MOVEABLE INTO CLOSING ENGAGEMENT WITH SAID SHELL AT ITS OPPOSITE END TO A POSITION SPACED FROM SID CORE PIN TO DEFINE AND END SPACE, SAID SPACES THEREBY PROVIDING A UNIFIED CAVITY FOR SHAPING THE INTEGRAL SIDE AND END WALLS OF THE ARTICLES TO BE MOLDED, SAID NOZZLE HAVING A DIVERGING ANNULAR FLOW PATH OPENING DIRECTLY INTO SAID ANNULAR SPACE AND CONCENTRICALLY OF SAID CORE PIN TO INJECT A CHARGE OF MOLTEN PLASTIC FROM SAID MASS IN A DIVERGING ANNULAR PATTERN INTO SAID CAVITY.
References Cited (Backward Citations)
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |