US3876744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compacting step by step
Assignee: Rio Tinto Switzerland AG
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Filing: 1972-06-13
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Granted: 1975-04-08
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Expires: 1992-06-13
Abstract
Abstract Method of producing a continuous length of product by passing a composition consisting of small particles and a binding agent through an open ended mold and compacting it step by step by lateral pressure. The mold for use in the method is longitudinally divided into at least four segments and of polyhedral internal cross-section, the segments being movable synchronously inwards and outwards transversely to the axis of the mold and being shaped to provide in the axial direction firstly a mold cavity tapering in the direction and then a cavity with walls parallel with the axis.
Inventors
- 👤 Harald Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:01
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/224; B30B11/225; B30B11/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
A METHOD OF CONTINUALLY PRODUCING, ALONG AN UPRIGHT MOLD AXIS, A CONTINUOUS LENGTH OF PRODUCT BY REPEATEDLY COMPACTING A COMPOSITION COMPRISING SMALL PARTICLES AND A IN AN OPEN ENDED MOLD HAVING AN INLET AND OUTLET COMMUNICATING WITH THE MOLD CAVITY, AND MOLD COMPRISING A PLURALITY OF AT LEAST FOUR SEGMENTS DISPOSED ALONG SAID AXIS AND DEFINING SAID CAVITY, SAID CAVITY HAVING AN INWARDLY TAPERED PORTION IN A DIRECTION FROM THE INLET TO THE OUTLET AND HAVING A STRAIGHT AXIAL PORTION IN THE VICINITY OF THE OUTLET, EACH INDIVIDUAL COMPACTING COMPRISING THE STEPS OF: MOVING ALL OF THE SEGMENTS PERPENDICULARLY OF, AND SYNCHRONOUSLY, TOWARDS SAID AXIS WHILE PREVENTING THE DEVELOPMENT OF A FORCE COMPONENT IN THE DIRECTION AGANIST THE MATERIAL FLOE THROUGH THE MOLD WHEREBY THE COMPOSITION IN THE CAVITY IS COMPACTED FROM MORE THAN TWO LATERAL DIRECTIONS TO FORM SAID PRODUCT; AND SUBSEQUENTLY MOVING ALL OF SAID SEGMENTS AWAY FROM SAID AXIS THROUGH A FIRST PREDETERMINED DISTANCE WHEREBY SAID PRODUCT WILL, WITH ADDITIONAL COMPOSITION INTRODUCED THROUGH SAID INLET INTO SAID WALL CAVITY, BE MOVED TOWARDS SAID OUTLET THROUGH A SECOND PREDETERMINED DISTANCE.
Claim 2
Independent Claim
182 words
A METHOD OF CONTINUALLY PRODUCING, ALONG AN UPRIGHT MOLD AXIS, A CONTINUOUS LENGTH OF PRODUCT BY REPEATEDLY COMPACTING A COMPOSITION COMPRISING SMALL PARTICLES AND A IN AN OPEN ENDED MOLD HAVING AN INLET AND OUTLET COMMUNICATING WITH THE MOLD CAVITY, AND MOLD COMPRISING A PLURALITY OF AT LEAST FOUR SEGMENTS DISPOSED ALONG SAID AXIS AND DEFINING SAID CAVITY, SAID CAVITY HAVING AN INWARDLY TAPERED PORTION IN A DIRECTION FROM THE INLET TO THE OUTLET AND HAVING A STRAIGHT AXIAL PORTION IN THE VICINITY OF THE OUTLET, EACH INDIVIDUAL COMPACTING COMPRISING THE STEPS OF: MOVING ALL OF THE SEGMENTS PERPENDICULARLY OF, AND SYNCHRONOUSLY, TOWARDS SAID AXIS WHILE PREVENTING THE DEVELOPMENT OF A FORCE COMPONENT IN THE DIRECTION AGANIST THE MATERIAL FLOE THROUGH THE MOLD WHEREBY THE COMPOSITION IN THE CAVITY IS COMPACTED FROM MORE THAN TWO LATERAL DIRECTIONS TO FORM SAID PRODUCT; AND SUBSEQUENTLY MOVING ALL OF SAID SEGMENTS AWAY FROM SAID AXIS THROUGH A FIRST PREDETERMINED DISTANCE WHEREBY SAID PRODUCT WILL, WITH ADDITIONAL COMPOSITION INTRODUCED THROUGH SAID INLET INTO SAID WALL CAVITY, BE MOVED TOWARDS SAID OUTLET THROUGH A SECOND PREDETERMINED DISTANCE.
Claim 3
Dependent Claim
67 words
A method, as claimed in claim 1 further comprising introducing the composition into said inlet by means of a worm screw feeder with a filling pressure sufficient to overcome any force opposing the material flow through the mold thereby restraining material from moving against the flow direction, and to effect the opening of the mold and thereby the longitudinal advance of the product for one feeding step.
Claim 4
Dependent Claim
16 words
A method according to claim 1, in which the composition is a green artificial carbonaceous composition.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |