US3144864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melting apparatus
Assignee: Akzona Inc
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Filing: 1962-05-31
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Granted: 1964-08-18
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 James W I Heijnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:41
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
APPARATUS FOR MELTING GRANULES OF THERMOPLASTIC POLYMER COMPRISING A FUNNEL-SHAPED MELTING CHAMBER AND A MELTING GRID DISPOSED WITHIN SAID CHAMBER, SAID GRID CONSISTING OF A SPIRALLY COILED TUBE CONFORMING TO THE SHAPE OF AN INVERTED CONE AND CLOSED IN HORIZONTAL PROJECTION, THE CONE ANGLE OF SAID GRID BEING APPROXIMATELY EQUAL TO THE FUNNEL ANGLE OF SAID CHAMBER AND BETWEEN FROM 40 TO 12*, SAID GRID SPACED A SUFFICIENT DISTANCE FROM THE INNER WALL OF SAID CHAMBER TO ALLOW FOR THE FREE FLOW OF MOLTEN POLYMER BETWEEN THE GRID AND INNER WALL OF SAID CHAMBER, THE TUBING OF SAID GRID BEING TRIANGULAR IN CROSS SECTION WITH THE SIDE POSITIONED NEAREST THE CONE AXIS RUNNING PARALLEL THERETO AND THE OTHER SIDES MAKING AN ACUTE ANGLE THEREWITH, WHEREBY POLYMER GRANULES SUPPLIED TO SAID APPARATUS ARE UNIFORMLY MELTED DURING PASSAGE THROUGH SAID GRID AND UNMELTED OR PARTIALLY MELTED GRANULES ARE PREVENTED FROM PASSING THROUGH SAID GRID.
Claim 2
Dependent Claim
152 words
APPARATUS FOR MELTING GRANULES OF THERMOPLASTIC POLYMER COMPRISING A FUNNEL-SHAPED MELTING CHAMBER AND A MELTING GRID DISPOSED WITHIN SAID CHAMBER, SAID GRID CONSISTING OF A SPIRALLY COILED TUBE CONFORMING TO THE SHAPE OF AN INVERTED CONE AND CLOSED IN HORIZONTAL PROJECTION, THE CONE ANGLE OF SAID GRID BEING APPROXIMATELY EQUAL TO THE FUNNEL ANGLE OF SAID CHAMBER AND BETWEEN FROM 40 TO 12*, SAID GRID SPACED A SUFFICIENT DISTANCE FROM THE INNER WALL OF SAID CHAMBER TO ALLOW FOR THE FREE FLOW OF MOLTEN POLYMER BETWEEN THE GRID AND INNER WALL OF SAID CHAMBER, THE TUBING OF SAID GRID BEING TRIANGULAR IN CROSS SECTION WITH THE SIDE POSITIONED NEAREST THE CONE AXIS RUNNING PARALLEL THERETO AND THE OTHER SIDES MAKING AN ACUTE ANGLE THEREWITH, WHEREBY POLYMER GRANULES SUPPLIED TO SAID APPARATUS ARE UNIFORMLY MELTED DURING PASSAGE THROUGH SAID GRID AND UNMELTED OR PARTIALLY MELTED GRANULES ARE PREVENTED FROM PASSING THROUGH SAID GRID.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |