US3746319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing of materials
Assignee: Individual
•
Filing: 1971-10-22
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Granted: 1973-07-17
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Expires: 1991-10-22
Abstract
Abstract An apparatus for mixing and advancing pulverulent, viscous and/or fibrous materials comprises a housing provided with an elongated interior chamber wherein an intermediate mixing zone is located between two end zones. At least three cooperating mixing and advancing screws are located in this chamber and one of them, with which the other two cooperate, is provided in the intermediate zone with a surface which does not have screw convolutions but is provided with mixing projections, whereas in the same zone the other screws are provided with screw convolutions which are of different pitch and/or of different inclination.
Inventors
- 👤 J Blach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/48; B29B7/485; B29B7/488; B29B7/489; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/40; B29C48/405; B29C48/42; B29C48/50; B29C48/505; B29C48/535
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
In an apparatus of the character described, in combination, housing means having an elongated mixing chamber an intermediate mixing zone of which is located between two end zones; and at least three cooperating mixing and advancing screws located in said chamber extending longitudinally thereof, one of said screws having in said intermediate zone a surface free from screw convolutions but provided with a plurality of mixing projections, and the other screws each cooperating with said one screw and having in said intermediate zone surfaces provided with respectively differing screw convolutions.
Claim 2
Dependent Claim
90 words
In an apparatus of the character described, in combination, housing means having an elongated mixing chamber an intermediate mixing zone of which is located between two end zones; and at least three cooperating mixing and advancing screws located in said chamber extending longitudinally thereof, one of said screws having in said intermediate zone a surface free from screw convolutions but provided with a plurality of mixing projections, and the other screws each cooperating with said one screw and having in said intermediate zone surfaces provided with respectively differing screw convolutions.
Claim 3
Dependent Claim
35 words
In an apparatus as defined in claim 1, wherein the screw convolutions of a first one of said other screws have a pitch which differs from those of a second one of said other screws.
Claim 4
Dependent Claim
41 words
In an apparatus as defined in claim 1, wherein the screw convolutions of a first one of said other screws have a pitch which is directed oppositely to that of the screw convolutions of a second one of said other screws.
Claim 5
Dependent Claim
84 words
In an apparatus as defined in claim 1, wherein said mixing projections are provided by forming in said surface of said one screw a first set of screw convolutions corresponding to those of a first one of said other screws, and thereupon forming in said surface and in said first set a second set of screw convolutions corresponding to those of a second one of said other screws, whereby both sets are partially destroyed and the remaining non-destroyed portions thereof constitute said mixing projections.
Claim 6
Dependent Claim
75 words
In an apparatus as defined in claim 1, said one screw being composed of two axially aligned sections having in said intermediate zone respective adjacent but spaced ends; said sections being provided in said end portions of said chamber with mutually oppositely pitched screw convolutions, and said other screws being provided in said end portions of said chamber with screw convolutions which are pitched oppositely to those of the respective section of said one screw.
Claim 7
Dependent Claim
28 words
In an apparatus as defined in claim 5, said other screws each being composed of two axially aligned screw sections which are shiftable axially of said one screw.
Claim 8
Dependent Claim
27 words
In an apparatus as defined in claim 6, further comprising a slidable element provided in said housing for movement transversely across said intermediate zone of said chamber.
Claim 9
Dependent Claim
39 words
In an apparatus as defined in claim 7, adjacent ends of said sections and screw sections being spaced from one another by a distance slightly greater than the thickness of said slidable element in direction longitudinally of said chamber.
Claim 10
Dependent Claim
26 words
In an apparatus as defined in claim 6, further comprising a mandrel located in said outlet opening centrally thereof and extending transversely across said intermediate zone.
Claim 11
Dependent Claim
40 words
In an apparatus as defined in claim 5, further comprising an outlet opening for processed material provided in a wall bounding said chamber in a region of said ends of said one screw in said intermediate zone of said chamber.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |