Patent US2748934A successfully refreshed from Google Patents.
US2748934A
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Extrusion apparatus
Assignee: Alcoa Corp
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Filing: 1952-10-04
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Granted: 1956-06-05
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Expires: 1972-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jesse H Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:47
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN INDIRECT EXTRUSION APPARATUS FOR PRODUCING TUBULAR EXTRUSIONS OF VARYING LINEAL CROSS-SECTION, SAID APPARATUS COMPRISING A CONTAINER FOR CONFINING MATERIAL TO BE EXTRUDED AND SEGMENTAL DIE SEALED AND SLIDABLE ON THE INTERIOR SURFACE OF THE CONTAINER, AND AXIALLY TAPERED WALL SURFACE IN SAID CONTAINER, A COMPELEMENTARY AXIALLY TAPERED GUIDE MEMBER IN FIXED RELATION WITHIN AND IN RESPECT TO THE CONTAINER IN ENGAGEMENT WITH AT LEAST ONE DIE SEGMENT OTHERWISE SEALED AND SLIDABLE IN RESPECT TO THE AXIALLY TAPERED WALL SURFACE OF THE CONTAINER, A MANDREL SECURED IN SAID CONTAINER AND EXTENDING THROUGH THE DIE, AND MEANS FOR OBTAINING RELATIVE MOVEMENT BETWEEN SAID DIE SEGMENTS AS A UNIT AND SAID CONTAINER AXIALLY IN RESPECT TO SAID GUIDE MEMBER AND MANDREL, SAID RELATIVE MOVEMENT EFFECTING SEPARATION OF THE DIE SEGMENTS AND A DIE ORIFICE FORMED THEREBETWEEN IN DIRECT RELATION TO THE AXIAL TAPER OF THE CONTAINER SURFACE AND GUIDE MEMBER.
Claim 2
Dependent Claim
148 words
AN INDIRECT EXTRUSION APPARATUS FOR PRODUCING TUBULAR EXTRUSIONS OF VARYING LINEAL CROSS-SECTION, SAID APPARATUS COMPRISING A CONTAINER FOR CONFINING MATERIAL TO BE EXTRUDED AND SEGMENTAL DIE SEALED AND SLIDABLE ON THE INTERIOR SURFACE OF THE CONTAINER, AND AXIALLY TAPERED WALL SURFACE IN SAID CONTAINER, A COMPELEMENTARY AXIALLY TAPERED GUIDE MEMBER IN FIXED RELATION WITHIN AND IN RESPECT TO THE CONTAINER IN ENGAGEMENT WITH AT LEAST ONE DIE SEGMENT OTHERWISE SEALED AND SLIDABLE IN RESPECT TO THE AXIALLY TAPERED WALL SURFACE OF THE CONTAINER, A MANDREL SECURED IN SAID CONTAINER AND EXTENDING THROUGH THE DIE, AND MEANS FOR OBTAINING RELATIVE MOVEMENT BETWEEN SAID DIE SEGMENTS AS A UNIT AND SAID CONTAINER AXIALLY IN RESPECT TO SAID GUIDE MEMBER AND MANDREL, SAID RELATIVE MOVEMENT EFFECTING SEPARATION OF THE DIE SEGMENTS AND A DIE ORIFICE FORMED THEREBETWEEN IN DIRECT RELATION TO THE AXIAL TAPER OF THE CONTAINER SURFACE AND GUIDE MEMBER.
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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |