US3132381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic molding machine
Assignee: Farrel Corp
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Filing: 1961-04-06
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Granted: 1964-05-12
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Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 William R Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/03; B29C45/17; B29C45/26; B29C2045/2683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PLASTIC MOLDING MACHINE INCLUDING A PLURALITY OF CYLINDERS, A RECIPROCATIVE PISTON IN EACH OF THE CYLINDERS, A FIRST CYLINDER HEAD FOR ONE END OF EACH CYLINDER, IN EACH INSTANCE THE ADJACENT END OF THE PISTON IN THE CYLINDER AND THIS CYLINDER HEAD BEING FORMED TO COOPERATIVELY FORM A MOLD CAVITY SURROUNDED BY PORTIONS WHICH SEAL TOGETHER WHEN THE PISTON IS PRESSED TOWARDS THIS CYLINDER HEAD, A SECOND CYLINDER HEAD FOR THE OTHER END OF EACH CYLINDER AND CONFINING A SPACE OPEN TO THE END OF THE PISTON THEREIN ADJACENT TO THIS SECOND HEAD, A SOURCE OF PLASTIC UNDER PRESSURE, AND MEANS FOR FEEDING THE PLASTIC FROM SAID SOURCE TO ALL OF SAID SPACES TO PRESS ALL OF THE PISTONS TOWARDS THE FIRST CYLINDER HEAD IN EACH INSTANCE, EACH PISTON HAVING A PLASTIC PASSAGE FOR TRANSFERRING THE PLASTIC FORM SAID SPACE TO SAID CAVITY WITHIN THE CONFINES OF SAID SEALINE PORTIONS.
Claim 2
Dependent Claim
151 words
A PLASTIC MOLDING MACHINE INCLUDING A PLURALITY OF CYLINDERS, A RECIPROCATIVE PISTON IN EACH OF THE CYLINDERS, A FIRST CYLINDER HEAD FOR ONE END OF EACH CYLINDER, IN EACH INSTANCE THE ADJACENT END OF THE PISTON IN THE CYLINDER AND THIS CYLINDER HEAD BEING FORMED TO COOPERATIVELY FORM A MOLD CAVITY SURROUNDED BY PORTIONS WHICH SEAL TOGETHER WHEN THE PISTON IS PRESSED TOWARDS THIS CYLINDER HEAD, A SECOND CYLINDER HEAD FOR THE OTHER END OF EACH CYLINDER AND CONFINING A SPACE OPEN TO THE END OF THE PISTON THEREIN ADJACENT TO THIS SECOND HEAD, A SOURCE OF PLASTIC UNDER PRESSURE, AND MEANS FOR FEEDING THE PLASTIC FROM SAID SOURCE TO ALL OF SAID SPACES TO PRESS ALL OF THE PISTONS TOWARDS THE FIRST CYLINDER HEAD IN EACH INSTANCE, EACH PISTON HAVING A PLASTIC PASSAGE FOR TRANSFERRING THE PLASTIC FORM SAID SPACE TO SAID CAVITY WITHIN THE CONFINES OF SAID SEALINE PORTIONS.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |