US3564653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable extrusion apparatus
Assignee: Haskon Inc
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Filing: 1967-08-23
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Granted: 1971-02-23
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Expires: 1987-08-23
Abstract
Abstract APPARATUS FOR BLOW MOLDING HOLLOW PLASTIC ARTICLES WHICH INCLUDES AN EXTRUSION HEAD HAVING A DIE AND A MANDREL DEFINING AN ANNULAR EXTRUSION ORIFICE. THE MANDREL IS AXIALLY SHIFTABLE RELATIVE TO THE DIE SO THAT THE CROSS SECTION OF THE ORIFICE CAN BE VARIED TO VARY THE CROSS SECTION OF THE TUBE. SHIFTING OF THE MANDREL IS AUTOMATICALLY CONTROLLED SO THAT IN EACH CYCLE OF OPERATION OF THE BLOW MOLDING MACHINE A PROGRAMMED MOVEMENT OF THE MANDREL OCCURS TO PROVIDE OPTIMUM WALL THICKNESS OF THE EXTRUDED TUBE FOR BLOWING THE DESIRED ARTICLE.
Inventors
- 👤 George H Sparks
- 👤 Edward Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/03; B29C48/09; B29C48/325; B29C48/10; B29C48/345; B29C49/00; B29C49/02; B29C49/04; B29C49/04108
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |