US3323173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for injection molding
Assignee: Foster Yates and Thom Ltd
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Filing: 1964-03-30
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Granted: 1967-06-06
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 William F Poyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/20; B29C33/202; B29C45/00; B29C45/17; B29C45/64; B29C45/68; Y; Y10; Y10S; Y10S425/00; Y10S425/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN AN INJECTION MOLDING APPARATUS, A MOLD CARRIER INCLUDING UPPER AND LOWER PARTS HINGEDLY CONNECTED FRO RELATIVE MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS, A FIRST MOLD ELEMENT CARRIED BY SAID UPPER PART, A SECOND MOLD ELEMENT POSITIONED IN SAID LOWER PART WITH SAID MOLD ELEMENTS COACTING TO DEFINE A MOLDING CAVITY WHEN SAID UPPER AND LOWER PARTS ARE IN THE CLOSED POSITION, MEANS FOR INJECTING PLASTICIZED MATERIAL INTO THE MOLDING CAVITY, SAID LOWER PART HAVING A CYLINDER THEREIN, A PISTON MOUNTED IN SAID CYLINDER FOR EXERTING A POSITIVE CLOSING PRESSURE ON SAID SECOND MOLD ELEMENT TOMAINTAIN SAID FIRST AND SECOND MOLD ELEMENTS TOGETHER WHEN PLASTICIZED MATERIAL IS INJECTED INTO THE MOLDING CAVITY FOR ELIMINATING FLASH, AND MEANS OPERABLY RELATED TO SAID UPPER PART AND SAID CYLINDER FOR APPLYING FLUID PRESSURE TO SAID PISTON WHEN SAID UPPER AND LOWER PARTS ARE IN THE CLOSED POSITION.
Claim 2
Dependent Claim
144 words
IN AN INJECTION MOLDING APPARATUS, A MOLD CARRIER INCLUDING UPPER AND LOWER PARTS HINGEDLY CONNECTED FRO RELATIVE MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS, A FIRST MOLD ELEMENT CARRIED BY SAID UPPER PART, A SECOND MOLD ELEMENT POSITIONED IN SAID LOWER PART WITH SAID MOLD ELEMENTS COACTING TO DEFINE A MOLDING CAVITY WHEN SAID UPPER AND LOWER PARTS ARE IN THE CLOSED POSITION, MEANS FOR INJECTING PLASTICIZED MATERIAL INTO THE MOLDING CAVITY, SAID LOWER PART HAVING A CYLINDER THEREIN, A PISTON MOUNTED IN SAID CYLINDER FOR EXERTING A POSITIVE CLOSING PRESSURE ON SAID SECOND MOLD ELEMENT TOMAINTAIN SAID FIRST AND SECOND MOLD ELEMENTS TOGETHER WHEN PLASTICIZED MATERIAL IS INJECTED INTO THE MOLDING CAVITY FOR ELIMINATING FLASH, AND MEANS OPERABLY RELATED TO SAID UPPER PART AND SAID CYLINDER FOR APPLYING FLUID PRESSURE TO SAID PISTON WHEN SAID UPPER AND LOWER PARTS ARE IN THE CLOSED POSITION.
References Cited (Backward Citations)
CA566491A
Cited
US3199159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |