US3792134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for monitoring product quality in a plastics injection-molding machine
Assignee: Western Atlas Inc
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Filing: 1970-10-15
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Granted: 1974-02-12
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Expires: 1990-10-15
Abstract
Abstract THE INVENTION CONTEMPLATES CONTROL OF QUALITY AND CONSISTENCY IN PRODUCTS OF RECYCLED OPERATION OF A PLASTICS INJECTION-MOLDING MACHINE BY OBSERVING, FOR EACH CYCLE OF OPERATION, THE PEAK PRESSURE OF PLASTICIZED MELT AND BY COMPARING THE OBSERVED VALUE AGAINST A REFERENCE VALUE. THE POLARITY AND MAGNITUDE OF DIFFERENCE BETWEEN OBSERVED AND REFERENCE VALUES ARE UTILIZED TO EFFECT CORRECTIVE ADJUSTMENT ON THE FEED FORCE OPERATIVE ON PLASTICIZED MELT ON A SUCCEEDING CYCLE OF THE MACHINE. IF DESIRED, MEANS RESPONSIVE TO DETECTED INABILITY TO EFFECT ADEQUATE CORRECTION MAY AUTOMATICALLY SHUT DOWN THE MACHINE AND INDICATE THE POLARITY OF THE FAILURE.
Inventors
- 👤 D Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:42
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/76; B29C45/77
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |