Patent US3335464A successfully refreshed from Google Patents.
US3335464A
Expired / Lapsed
US
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Injection molding machine
Assignee: Lester Engineering Co
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Filing: 1965-03-03
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Granted: 1967-08-15
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Expires: 1985-03-03
Abstract
No abstract record available.
Inventors
- 👤 William H Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:00
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/03; B29C45/07; B29C45/17; B29C45/176; B29C45/1773; B29C45/26; B29C45/27; B29C45/28; B29C45/2803; B29C45/46; B29C45/47; B29C45/50; B29C45/1781
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A RECIPROCATING SCREW INJECTION MOLDING MACHINE OF THE TYPE IN WHICH ROTATION AND AXIAL RETRACTION OF A FEED SCREW IN A CYLINDER ADVANCES MATERIAL INTO A CHAMBER BETWEEN THE INJECTION NOZZLE OF SAID CYLINDER AND THE FORWARD END OF SAID FEED SCREW, AND IN WHICH AXIAL ADVANCE OF SAID FEED SCREW IN SAID CYLINDER EJECTS THE MATERIAL IN SAID CHAMBER THROUGH SAID NOZZLE, THE IMPROVEMENT WHICH COMPRISES PROVIDING A PIVOTAL MOUNTING FOR SAID CYLINDER FOR MOVEMENT OF SAID NOZZLE OUT OF AND INTO REGISTER RESPECTIVELY WITH A MOLD INLET OPENING DURING ROTATION AND AXIAL RETRACTION OF SAID FEED SCREW AND DURING AXIAL ADVANCE OF SAID FEED SCREW, AND MEANS RESPONSIVE TO PREDETERMINED RETRACTION OF SAID FEED SCREW TO SWING SAID CYLINDER ABOUT SAID PIVOTAL MOUNTING FROM A POSITION WHEREAT SAID NOZZLE IS OUT OF REGISTE WITH SAID MOLD INLET OPENING TO A POSITION WHEREAT SAID NOZZLE IS IN REGISTER WITH SAID MOLD INLET OPENING.
Claim 2
Dependent Claim
155 words
IN A RECIPROCATING SCREW INJECTION MOLDING MACHINE OF THE TYPE IN WHICH ROTATION AND AXIAL RETRACTION OF A FEED SCREW IN A CYLINDER ADVANCES MATERIAL INTO A CHAMBER BETWEEN THE INJECTION NOZZLE OF SAID CYLINDER AND THE FORWARD END OF SAID FEED SCREW, AND IN WHICH AXIAL ADVANCE OF SAID FEED SCREW IN SAID CYLINDER EJECTS THE MATERIAL IN SAID CHAMBER THROUGH SAID NOZZLE, THE IMPROVEMENT WHICH COMPRISES PROVIDING A PIVOTAL MOUNTING FOR SAID CYLINDER FOR MOVEMENT OF SAID NOZZLE OUT OF AND INTO REGISTER RESPECTIVELY WITH A MOLD INLET OPENING DURING ROTATION AND AXIAL RETRACTION OF SAID FEED SCREW AND DURING AXIAL ADVANCE OF SAID FEED SCREW, AND MEANS RESPONSIVE TO PREDETERMINED RETRACTION OF SAID FEED SCREW TO SWING SAID CYLINDER ABOUT SAID PIVOTAL MOUNTING FROM A POSITION WHEREAT SAID NOZZLE IS OUT OF REGISTE WITH SAID MOLD INLET OPENING TO A POSITION WHEREAT SAID NOZZLE IS IN REGISTER WITH SAID MOLD INLET OPENING.
References Cited (Backward Citations)
US2585204A
Cited
US3162900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |