US3218671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic extruder with automatic temperature control
Assignee: Beloit Corp
•
Filing: 1962-04-04
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Granted: 1965-11-23
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Expires: 1982-04-04
Abstract
No abstract record available.
Inventors
- 👤 Edgar J Justus
- 👤 Robert A Daane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/92; B29C48/03; B29C48/09; B29C48/10; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92209; B29C2948/92314; B29C2948/92504; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C2948/92904; B29C48/05; B29C48/06; B29C48/12; B29C48/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN APPARATUS FOR PROCESSING PLASTIC MATERIAL OR THE LIKE, AN ELONGATED HOLLOW MEMBER OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING INLET AND OUTLET OPENINGS, MEANS FOR EFFECTING FLOW OF MATERIAL FROM SAID INLET OPENING AND OUT THROUGH SAID OUTLET OPENING, A PLURALITY OF ELECTRODES ENGAGED WITH LONGITUDINALLY SPACED PORTIONS OF SAID MEMBER, A TRANSFORMER HAVING A PRIMARY WINDING AND HAVING A LOW VOLTAGE HIGH AMPERAGE SECONDARY WINDING CONNECTED TO SAID ELECTRODES, MEANS FOR CONNECTING SAID PRIMARY WINDING TO A CURRENT SUPPLY INCLUDING A SATURABLE REACTOR HAVING A WINDING IN SERIES WITH SAID PRIMARY WINDING AND HAVING A CONTROL WINDING, AMPLIFIER MEANS HAVING AN INPUT AND HAVING AN OUTPUT CONNECTED TO SAID CONTROL WINDING, AND THERMOCOUPLE MEANS FOR SENSING THE TEMPERATURE OF SAID MEMBER AND APPLYING A TEMPERATURE SIGNAL TO SAID AMPLIFIER INPUT.
Claim 2
Dependent Claim
130 words
IN APPARATUS FOR PROCESSING PLASTIC MATERIAL OR THE LIKE, AN ELONGATED HOLLOW MEMBER OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING INLET AND OUTLET OPENINGS, MEANS FOR EFFECTING FLOW OF MATERIAL FROM SAID INLET OPENING AND OUT THROUGH SAID OUTLET OPENING, A PLURALITY OF ELECTRODES ENGAGED WITH LONGITUDINALLY SPACED PORTIONS OF SAID MEMBER, A TRANSFORMER HAVING A PRIMARY WINDING AND HAVING A LOW VOLTAGE HIGH AMPERAGE SECONDARY WINDING CONNECTED TO SAID ELECTRODES, MEANS FOR CONNECTING SAID PRIMARY WINDING TO A CURRENT SUPPLY INCLUDING A SATURABLE REACTOR HAVING A WINDING IN SERIES WITH SAID PRIMARY WINDING AND HAVING A CONTROL WINDING, AMPLIFIER MEANS HAVING AN INPUT AND HAVING AN OUTPUT CONNECTED TO SAID CONTROL WINDING, AND THERMOCOUPLE MEANS FOR SENSING THE TEMPERATURE OF SAID MEMBER AND APPLYING A TEMPERATURE SIGNAL TO SAID AMPLIFIER INPUT.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |