US3704866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mixer
Assignee: Farrel Corp
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Filing: 1970-05-28
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Granted: 1972-12-05
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Expires: 1990-05-28
Abstract
Abstract A continuous mixer has its barrel forming the rotor chambers upwardly open above these chambers and provided with removable closing sections.
Inventors
- 👤 Douglas E Mosher
- 👤 Carleton H Treat
- 👤 Edwin H Drab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/02; B29B7/22; B29B7/24; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/48; B29B7/488; B29B7/58; B29B7/60; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/40; B29C48/50; B29C48/68; B29C48/684
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
199 words
A continuous internal mixer comprising a barrel forming two laterally interconnecting substantially cylindrical and mutually parallel chambers having at one end a common discharge orifice, bladed rotors located in said chambers, means for receiving the material to be mixed and stuffing it under pressure into said chambers at a location spaced from said discharge orifice, means for rotating said rotors, each of said rotors having a blade with a cross section that is substantially like that of a Banbury-type blade and having a portion that twists away from its direction of rotation and a portion that twists in the opposite direction, the length and twist ratio between said oppositely twisting portions of said blade being such that when said chambers contain said material the average of the axially directed forces applied to the latter by said blades is insufficient to force the material through said orifice, whereby the overall axial travel of said material through said chambers is dependent on the rate at which it is received by the first named means, wherein the improvement comprises a portion of said barrel over the interconnecting portions of said chambers and said rotors being formed by one or more removable sections.
Claim 2
Dependent Claim
199 words
A continuous internal mixer comprising a barrel forming two laterally interconnecting substantially cylindrical and mutually parallel chambers having at one end a common discharge orifice, bladed rotors located in said chambers, means for receiving the material to be mixed and stuffing it under pressure into said chambers at a location spaced from said discharge orifice, means for rotating said rotors, each of said rotors having a blade with a cross section that is substantially like that of a Banbury-type blade and having a portion that twists away from its direction of rotation and a portion that twists in the opposite direction, the length and twist ratio between said oppositely twisting portions of said blade being such that when said chambers contain said material the average of the axially directed forces applied to the latter by said blades is insufficient to force the material through said orifice, whereby the overall axial travel of said material through said chambers is dependent on the rate at which it is received by the first named means, wherein the improvement comprises a portion of said barrel over the interconnecting portions of said chambers and said rotors being formed by one or more removable sections.
Claim 3
Dependent Claim
31 words
The mixer of claim 1 in which at least one of said sections is located in a zone extending forwardly from the junctions of the oppositely twisting portions of said blades.
Claim 4
Dependent Claim
28 words
The mixer of claim 1 in which at least one of said sections has a bore formed therethrough openIng from the outside of this section to its inside.
Claim 5
Dependent Claim
35 words
The mixer of claim 1 in which at least one of said sections has a bore formed therethrough opening from the outside of this section to its inside, and a removable obturator for said bore.
Claim 6
Dependent Claim
31 words
The mixer of claim 1 in which said barrel portion is formed for substantially the lengths of said rotors by a plurality of said sections and the latter are individually removable.
Claim 7
Dependent Claim
31 words
The mixer of claim 1 in which the inside contour of said one or more sections is shaped to form the upper parts on the laterally interconnecting portions of said chambers.
Claim 8
Dependent Claim
34 words
The mixer of claim 6 in which at least one of said one or more sections is located within a zone extending forwardly from the junctions of the oppositely twisting blades of said rotors.
Claim 9
Dependent Claim
27 words
The mixer of claim 7 in which said one of said sections has a bore formed therethrough opening from the outside of this section to its inside.
Claim 10
Dependent Claim
133 words
A continuous internal mixer comprising a barrel forming two laterally interconnecting substantially cylindrical and mutually parallel chambers having interspaced charging and discharging ends, means for moving material through said chambers, said barrel having a top opening above the interjoining portions of said chambers, rotors extending through said chambers and having blades with cross sections substantially like that of a Banbury-type blade and having at least portions below said opening, and means for rotating said rotors so their blades move downwardly towards each other below the upper junctions of said chambers, said blades being constructed to impart mixing energy to material under radial pressure while this material moves through said chambers under said opening, the latter having a maximum transverse width extending transversely between vertical planes extending through the axes of said two rotors.
Claim 11
Dependent Claim
133 words
A continuous internal mixer comprising a barrel forming two laterally interconnecting substantially cylindrical and mutually parallel chambers having interspaced charging and discharging ends, means for moving material through said chambers, said barrel having a top opening above the interjoining portions of said chambers, rotors extending through said chambers and having blades with cross sections substantially like that of a Banbury-type blade and having at least portions below said opening, and means for rotating said rotors so their blades move downwardly towards each other below the upper junctions of said chambers, said blades being constructed to impart mixing energy to material under radial pressure while this material moves through said chambers under said opening, the latter having a maximum transverse width extending transversely between vertical planes extending through the axes of said two rotors.
Claim 12
Dependent Claim
48 words
The mixer of claim 9 in which at least one removable top closing section is provided to at least partly close said opening, said section having a bottom contoured as two interjoining cylindrical portions which complete the cylindrical shapes of said two chambers where said section is used.
Claim 13
Dependent Claim
32 words
The mixer of claim 10 in which said removable section has a bore formed therethrough, opening from the outside of this section to its inside, and a removable obturator for said bore.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |