US3259944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold charging means
Assignee: United Shoe Machinery Corp
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Filing: 1965-07-27
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Granted: 1966-07-12
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Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Donald B Mcilvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/53; B29C45/54; Y; Y10; Y10S; Y10S425/00; Y10S425/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN INJECTION MOLDING MACHINE HAVING IN COMBINATION, AN INJECTION CYLINDER, A PISTON MOUNTED IN THE CYLINDER, AN INJECTION NOZZLE AT THE DISCHARGE END OF THE CYLINDER THROUGH WHICH THE PISTON EXPELS FLUID PLASTIC INTO A MOLD CAVITY, MEANS FOR INTRODUCING FLUID PLASTIC INTO THE CYLINDER AND THUS CAUSING RETRACTION OF THE PISTON IN THE CYLINDER TO A NORMAL REST POSITION ADJACENT THE END OPPOSITE SAID DISCHARGE END, AND MEANS OPERATED BY SUCH RETRACTION OF THE PISTON FOR CAUSING THE OPERATION OF THE INTRODUCING MEANS TO TERMINATE, THE PISTON AND CYLINDER ASSEMBLY BEING CHARACTERIZED BY AN ESCAPE PASSAGE THROUGH WHICH FLUID PLASTIC CAN FLOW FROM THE CYLINDER IN THE EVENT OF A FAILURE OF THE NMEANS FOR CAUSING THE OPERATION OF THE INTRODUCING MEANS TO TERMINATE ACCOMPANIED BY A CONSEQUENT RETRACTING MOVEMENT OF THE PISTON BEYOND ITS NORMAL REST POSITION.
Claim 2
Dependent Claim
139 words
AN INJECTION MOLDING MACHINE HAVING IN COMBINATION, AN INJECTION CYLINDER, A PISTON MOUNTED IN THE CYLINDER, AN INJECTION NOZZLE AT THE DISCHARGE END OF THE CYLINDER THROUGH WHICH THE PISTON EXPELS FLUID PLASTIC INTO A MOLD CAVITY, MEANS FOR INTRODUCING FLUID PLASTIC INTO THE CYLINDER AND THUS CAUSING RETRACTION OF THE PISTON IN THE CYLINDER TO A NORMAL REST POSITION ADJACENT THE END OPPOSITE SAID DISCHARGE END, AND MEANS OPERATED BY SUCH RETRACTION OF THE PISTON FOR CAUSING THE OPERATION OF THE INTRODUCING MEANS TO TERMINATE, THE PISTON AND CYLINDER ASSEMBLY BEING CHARACTERIZED BY AN ESCAPE PASSAGE THROUGH WHICH FLUID PLASTIC CAN FLOW FROM THE CYLINDER IN THE EVENT OF A FAILURE OF THE NMEANS FOR CAUSING THE OPERATION OF THE INTRODUCING MEANS TO TERMINATE ACCOMPANIED BY A CONSEQUENT RETRACTING MOVEMENT OF THE PISTON BEYOND ITS NORMAL REST POSITION.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |