Injection molding machine
Abstract
Abstract D R A W I N G A VERTICAL INJECTION MILDINGMACHINE WHERE THE UPPER DIE MEMBER IS HELD IN THE UPPER POSITION BY HYDRAULIC PRESSURE WHICH, WHEN RELIEVED, ALLOWS THE DIE MEMBER TO MOVE DOWNWARDLY BY GRAVITY INTO CONTACT WITH THE LOWER DIE MEMBER. FIXED TENSION RODS ARE SECURED AT THEIR LOWER ENDS TO CLAMPING UNITS AND EXTEND AT THEIR UPPER ENDS INTO CAVITIES IN THE UPER SLIDE. THE SLIDE AND DIE MOVE DOWNWARDLY WITH RESPECT TO THE TENSION RODS AND WHEN THE TWO DIES ARE IN CONTACT WITH EACH OTHER THEY BECOME LOCKED WITH THE TENSION RODS. HYDRAULIC FLUID UNDER PRESSURE IS THEN INTRODUCED INTO THE CLAMPING UNITS AT THE BOTTOM OF THE PRESS, THEREBY EXERTING PRESSURE DOWNWARDLY ON THE TENSION RODS AND UPWARDLY ON THE PRESS BED, THUS CLAMPING THE UPPER AND LOWER DIE MEMBERS TOGETHER DURING THE INJECTION PROCESS.
Inventors
- 👤 Louis F Carrieri
- 👤 Norton D Skinner
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |