US3235909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding machine
Assignee: United Shoe Machinery Corp
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Filing: 1963-05-01
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Granted: 1966-02-22
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 Donald B Mcilvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:45
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/53; B29C45/54; B29C45/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN AN INJECTION MOLDING MACHINE, THE COMBINATION WITH A MOLD CHARGING RAM, RAM CYLINDER AND A PLASTICATOR WHICH OPERATES TO CHARGE THE RAM CYLINDER AND TO MOVE THE RAM INTO ITS RETRACTED POSITION PREPORATORY TO A MOLD CHARGING OPERATION, OF A HOPPER FOR SUPPLYING PLASTIC MATERIAL TO THE PLASTICATOR, A CONDUIT THROUGH WHICH PLASTIC MATERIAL FLOWS FROM THE HOPPER TO THE PLASTICATOR, A GATE VALUE BETWEEN THE HOPPER AND THE CONDUIT, A PISTON AND CYLINDER ASSEMBLY FOR OPERATING THE GATE VALVE, A CONTROL VALVE FOR CAUSING THE OPERATION OF THE PISTON AND CYLINDER ASSEMBLY AND MEANS OPERATED BY THE MOLD CHARGING RAN DURING ITS RETRACTION FOR CAUSING SHIFTING OF THE CONTROL VALVE WHEREBY TO EFFECT THE CLOSING OF THE GATE VALVE.
Claim 2
Dependent Claim
121 words
IN AN INJECTION MOLDING MACHINE, THE COMBINATION WITH A MOLD CHARGING RAM, RAM CYLINDER AND A PLASTICATOR WHICH OPERATES TO CHARGE THE RAM CYLINDER AND TO MOVE THE RAM INTO ITS RETRACTED POSITION PREPORATORY TO A MOLD CHARGING OPERATION, OF A HOPPER FOR SUPPLYING PLASTIC MATERIAL TO THE PLASTICATOR, A CONDUIT THROUGH WHICH PLASTIC MATERIAL FLOWS FROM THE HOPPER TO THE PLASTICATOR, A GATE VALUE BETWEEN THE HOPPER AND THE CONDUIT, A PISTON AND CYLINDER ASSEMBLY FOR OPERATING THE GATE VALVE, A CONTROL VALVE FOR CAUSING THE OPERATION OF THE PISTON AND CYLINDER ASSEMBLY AND MEANS OPERATED BY THE MOLD CHARGING RAN DURING ITS RETRACTION FOR CAUSING SHIFTING OF THE CONTROL VALVE WHEREBY TO EFFECT THE CLOSING OF THE GATE VALVE.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |