Patent US3591145A successfully refreshed from Google Patents.
US3591145A
Expired / Lapsed
US
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Method for continuously mixing powders and oils
Assignee: Vallance and Co Morley Ltd
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Filing: 1970-03-24
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Granted: 1971-07-06
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Expires: 1990-03-24
Abstract
Abstract Apparatus for the continuous production of putty from the powdered and liquid constituents thereof wherein the constituents are fed continuously in measured proportions to a preliminary mixing trough in which a rotary screw device agitates and mixes the constituents and conveys them along the trough into an extrusion chamber in which a second rotary screw device further agitates the mix and forces it serially through at least two series of restricted orifices in a plurality of multiorificed plates spaced transversely along the extrusion chamber and thence through a delivery outlet as a continuous flow, said second rotary screw device preferably cooperating with one or more of said extrusion plates and with longitudinally extending projections and recess of the inner wall of said extrusion chamber to exert also a shearing action on the mix.
Inventors
- 👤 Donald Ainsworth
- 👤 Trevor Blewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:33
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/72; B01F27/725
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A method of continuously mixing powdered and liquid constituents of putty and delivering the putty in the form of a stream thereof, comprising the steps of continuously feeding measured quantities of the constituents at a controlled rate to a feeding end of a premixing chamber, mechanically agitating and mixing said constituents in said premixing chamber whilst simultaneously conveying them therethrough with a helical mixing and conveying movement, transferring the resultant preliminary mixture continuously into an extrusion chamber, subjecting the mixture to a further mixing action and to a shearing action whilst being propelled along said extrusion chamber under pressure, then continuously forcing the mixture by a screw action serially through at least two series of restricted orifices to produce a further intermixing, the orifices increasing in size in each successive series in the direction of travel of the mixture, and thereafter forcing the putty continuously from an outlet in compacted form.
Claim 2
Independent Claim
151 words
A method of continuously mixing powdered and liquid constituents of putty and delivering the putty in the form of a stream thereof, comprising the steps of continuously feeding measured quantities of the constituents at a controlled rate to a feeding end of a premixing chamber, mechanically agitating and mixing said constituents in said premixing chamber whilst simultaneously conveying them therethrough with a helical mixing and conveying movement, transferring the resultant preliminary mixture continuously into an extrusion chamber, subjecting the mixture to a further mixing action and to a shearing action whilst being propelled along said extrusion chamber under pressure, then continuously forcing the mixture by a screw action serially through at least two series of restricted orifices to produce a further intermixing, the orifices increasing in size in each successive series in the direction of travel of the mixture, and thereafter forcing the putty continuously from an outlet in compacted form.
Claim 3
Dependent Claim
47 words
The method of continuously mixing and delivering putty as claimed in claim 1, wherein a sufficiently great pressure is applied to the mixture in said extrusion chamber to raise the temperature of the mixture high enough to assist materially in producing an intimate contact between the constituents.
Claim 4
Dependent Claim
56 words
The method of continuously mixing and delivering putty as claimed in claim 1, wherein the mixture is subjected to a smearing and shearing action, as it is forced into at least one of said series of orifices, by the movement across the faces of said orifices of screw means which applies the pressure to the mixture.
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |