US3245116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic molding machine
Assignee: Borg Warner Corp
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Filing: 1963-01-23
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Granted: 1966-04-12
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Expires: 1983-01-23
Abstract
No abstract record available.
Inventors
- 👤 James W Hendry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:27
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/285; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92114; B29C2948/92161; B29C2948/9218; B29C2948/92323; B29C2948/92361; B29C2948/9238; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
AN EXTRUSION APPARATUS, COMPRISING: AN EXTRUSION CYLINDER; AN EXTRUSION SCREW LOCATED WITHIN SAID EXTRUSION CYLINDER; MEANS FOR ROTATING SAID EXTRUSION SCREW; A PLURALITY OF FEEDING UNITS COMMUNICATING WITH SAID EXTRUSION CYLINDER AT POINTS SPACED SUBSTANTIALLY THE SAME DISTANCE FROM THE DISCHARGE END OF THE CYLINDER, EACH FEEDING UNIT COMPRISING A FEEDING CYLINDER, A RECIPROCABLE RAM THEREIN AND MEANS FOR RECIPROCATING SAID RAM WHEREBY PLASTIC MATERIAL CAN BE FED INTO SAID EXTRUSION CYLINDER UNDER PRESSURE FROM EACH OF SAID FEEDING UNITS AND THE MATERIAL FROM EACH FEEDING UNITS WILL BE SUBSTANTIALLY EQUALLY PLASTICIZED BY SAID EXTRUSION SCREW; VALVE MEANS IN EACH OF SAID FEEDING UNITS AT THE END THEREOF ADJACENT OF SAID EXTRUSION CYLINDER FOR CLOSING OFF COMMUNICATION BETWEEN SAID FEEDING UNITS AND SAID EXTRUSION CYLINDER EACH SAID VALVE MEANS BEING OPERABLE IN RELATION TO ITS ASSOCIATED RAM SO THAT SAID VALVE MEANS IS OPEN WHEN ITS ASSOCIATED RAM IS BEING ADVANCED; CONTROL MEANS FOR EFFECTING SUCCESSIVE RECIPROCATION OF SAID RAM IN ORDER TO FEED PLASTIC MATERIAL FROM SAID FEEDING UNITS IN SUCCESSION INTO SAID EXTRUSION CYLINDER.
Claim 2
Dependent Claim
176 words
AN EXTRUSION APPARATUS, COMPRISING: AN EXTRUSION CYLINDER; AN EXTRUSION SCREW LOCATED WITHIN SAID EXTRUSION CYLINDER; MEANS FOR ROTATING SAID EXTRUSION SCREW; A PLURALITY OF FEEDING UNITS COMMUNICATING WITH SAID EXTRUSION CYLINDER AT POINTS SPACED SUBSTANTIALLY THE SAME DISTANCE FROM THE DISCHARGE END OF THE CYLINDER, EACH FEEDING UNIT COMPRISING A FEEDING CYLINDER, A RECIPROCABLE RAM THEREIN AND MEANS FOR RECIPROCATING SAID RAM WHEREBY PLASTIC MATERIAL CAN BE FED INTO SAID EXTRUSION CYLINDER UNDER PRESSURE FROM EACH OF SAID FEEDING UNITS AND THE MATERIAL FROM EACH FEEDING UNITS WILL BE SUBSTANTIALLY EQUALLY PLASTICIZED BY SAID EXTRUSION SCREW; VALVE MEANS IN EACH OF SAID FEEDING UNITS AT THE END THEREOF ADJACENT OF SAID EXTRUSION CYLINDER FOR CLOSING OFF COMMUNICATION BETWEEN SAID FEEDING UNITS AND SAID EXTRUSION CYLINDER EACH SAID VALVE MEANS BEING OPERABLE IN RELATION TO ITS ASSOCIATED RAM SO THAT SAID VALVE MEANS IS OPEN WHEN ITS ASSOCIATED RAM IS BEING ADVANCED; CONTROL MEANS FOR EFFECTING SUCCESSIVE RECIPROCATION OF SAID RAM IN ORDER TO FEED PLASTIC MATERIAL FROM SAID FEEDING UNITS IN SUCCESSION INTO SAID EXTRUSION CYLINDER.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |