Patent US3901641A successfully refreshed from Google Patents.
US3901641A
Expired / Lapsed
US
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Compacting step by step
Assignee: Rio Tinto Switzerland AG
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Filing: 1973-07-05
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Granted: 1975-08-26
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Expires: 1993-07-05
Abstract
Abstract A mold, for use in producing a continuous length of product, is divided longitudinally into at least four movable segments. The segments are movable synchronously inwardly and outwardly transversely to the mold axis, and are so shaped as to provide, in the axial direction, a tapering mold cavity followed by a cavity with walls substantially parallel to the axis.
Inventors
- 👤 Harald Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:45
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/007; Y; Y10; Y10S; Y10S425/00; Y10S425/028; Y10S425/029
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
An axially elongated mold for continuously producing a continuous length of product by step-by-step compacting a composition comprised of small particles and a binding agent, saId mold being open ended, vertically arranged and longitudinally divided into a plurality of segments, said mold being of polygonal internal cross-section, moving means operable for synchronously moving all of said segments inwardly and outwardly in a direction transverse to the longitudinal axis of said mold, to produce the step-by-step compaction from more than two lateral directions, said segments, in combination, being shaped to form, in the downward axial compacting direction, a first tapered mold cavity and then a second mold cavity having walls parallel to the axis of said mold.
Claim 2
Dependent Claim
116 words
An axially elongated mold for continuously producing a continuous length of product by step-by-step compacting a composition comprised of small particles and a binding agent, saId mold being open ended, vertically arranged and longitudinally divided into a plurality of segments, said mold being of polygonal internal cross-section, moving means operable for synchronously moving all of said segments inwardly and outwardly in a direction transverse to the longitudinal axis of said mold, to produce the step-by-step compaction from more than two lateral directions, said segments, in combination, being shaped to form, in the downward axial compacting direction, a first tapered mold cavity and then a second mold cavity having walls parallel to the axis of said mold.
Claim 3
Dependent Claim
13 words
The mold according to claim 1 wherein there are four of said segments.
Claim 4
Dependent Claim
13 words
The mold according to claim 1 wherein there are six of said segments.
Claim 5
Dependent Claim
61 words
The mold according to claim 1 wherein said segments each provide one side of the polygon and are symmetrically arranged about the longitudinal axis of said mold, said segments being in abuttment with one another across planes which are continuous of the sides of the polygon, said segments being moveable in a direction substantially tangential to the sides of the polyhedron.
Claim 6
Dependent Claim
44 words
The mold according to claim 1 wherein a removable floor is provided for temporarily closing the end of said mold that is remote from the inlet end thereof, said floor being in position only during the starting of the filling operation of said mold.
Claim 7
Dependent Claim
18 words
The mold according to claim 1 wherein guide means are provided for limiting said segments to linear movement.
References Cited (Backward Citations)
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |