US3579723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder-molder
Assignee: Leesona Corp
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Filing: 1969-07-25
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Granted: 1971-05-25
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Expires: 1989-07-25
Abstract
Abstract EXTRUDING-MOLDING APPARATUS WHEREIN A SHEET OF SYNTHETIC PLASTIC IS DIRECTED VERTICALLY FROM AN EXTRUDER TO A DIFFERENTIAL PRESSURE MOLDING ASSEMBLY WHICH HAS MOLDS MOVABLE INTO CLAMPED RELATIONSHIP WITH THE SHEET. THE MOLDS ARE OF LESS WIDTH THAN THE EXTRUDING ORIFICE OF THE EXTRUDING HEAD SO THAT A TIGHT SEAL IS ASSURED AND THE EDGES OF THE PLASTIC SHEET ARE COOLED AT THE SIDE EDGES OF THE MOLDS SO THAT THEY MAY BE GRIPPED BY MEMBERS DOWNSTREAM FROM THE MOLD ASSEMBLY WHICH SUPPORT THE WEIGHT OF THE SHEET AND PREVENT IS TEARING OFF, OR ORIENTATION, UNDER ITS OWN WEIGHT.
Inventors
- 👤 Gaylord W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:35
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/10; B29C31/00; B29C31/004; B29C51/18
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |