US3711067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruding and mixing equipment
Assignee: Somerset Technologies Inc
•
Filing: 1971-01-08
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Granted: 1973-01-16
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Expires: 1991-01-08
Abstract
Abstract Equipment including material-forwarding and mixing facilities arranged in tandem with respect to the direction of flow of a potentially thermoplastic material to achieve a high degree of homogenization of the heat content and composition of the discharged product. The mixing facility occurs downstream from the material-propulsion facility and is constructed to effect multitudinous channeling in conjunction with working of the material resulting from friction between the material and the inner surface of a barrel surrounding the mixing facility. The mixing facility may be rotated to promote the action by barrel on the material.
Inventors
- 👤 L Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:46
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80; B01F33/82; B01F33/822; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/362; B29C48/50; B29C48/505; B29C48/53; B29C48/78; B29C48/80; B29C48/83; B29C48/834; B29C48/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
Extruder and mixing apparatus comprising: a barrel having a first barrel section and a second barrel section connected in end-to-end relationship, the second section having a longitudinal axis in respect to which it is circular and concentric; means housed in the first section and movable means therewithin for forwarding a fluid plastic material into the second section, mixing means housed within the second section comprising a plurality of convoluted blades connected in end-to-end relationship progressively lengthwise of said axis with the width of the blades having substantially the same dimension as the inner diameter of said second section, and end portions of the blades in axially overlapping relationship; the adjacent ends of each pair of adjacent blades being angularly spaced from one another about said axis.
Claim 2
Dependent Claim
126 words
Extruder and mixing apparatus comprising: a barrel having a first barrel section and a second barrel section connected in end-to-end relationship, the second section having a longitudinal axis in respect to which it is circular and concentric; means housed in the first section and movable means therewithin for forwarding a fluid plastic material into the second section, mixing means housed within the second section comprising a plurality of convoluted blades connected in end-to-end relationship progressively lengthwise of said axis with the width of the blades having substantially the same dimension as the inner diameter of said second section, and end portions of the blades in axially overlapping relationship; the adjacent ends of each pair of adjacent blades being angularly spaced from one another about said axis.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 comprising: means for supporting said mixing means in rotatable relation with said second section with said axis as an axis of rotation.
Claim 4
Dependent Claim
53 words
The apparatus of claim 1 wherein: said first section and movable means define an extruder barrel and screw; said apparatus Comprises means for supporting said mixing means in rotatable relation with said second section with said axis an axis of rotation; and said mixing means is connected in drive relation with said screw.
Claim 5
Dependent Claim
17 words
The apparatus of claim 2 comprising: means independent of said movable means for rotating said mixing means.
Claim 6
Dependent Claim
47 words
The apparatus of claim 1 wherein: the helix angle of at least one blade varies progressively along the length from substantially 90* at one end to a desired minimum angle halfway along the length and then back to substantially 90* at the other end of the blade.
Claim 7
Dependent Claim
137 words
Extruding and cooling apparatus comprising: a first barrel section and a second barrel section connected in end-to-end relationship; a second section having a longitudinal axis with respect to which it is circular and concentric; means housed in the first section and movable means therewithin for forwarding a fluid plastic material into the second section; mixing means housed within the second section comprising a plurality of convoluted blades connected in end-to-end relationship proceeding lengthwise of said axis with the width of the blades having substantially the same dimension as the inner diameter of said second section, and end portions of the blades in axially overlapping relationship; the adjacent ends of each pair of adjacent blades being angularly spaced with one another about said axis; and means for circulating a coolant in heat exchange relation with said second section.
Claim 8
Dependent Claim
137 words
Extruding and cooling apparatus comprising: a first barrel section and a second barrel section connected in end-to-end relationship; a second section having a longitudinal axis with respect to which it is circular and concentric; means housed in the first section and movable means therewithin for forwarding a fluid plastic material into the second section; mixing means housed within the second section comprising a plurality of convoluted blades connected in end-to-end relationship proceeding lengthwise of said axis with the width of the blades having substantially the same dimension as the inner diameter of said second section, and end portions of the blades in axially overlapping relationship; the adjacent ends of each pair of adjacent blades being angularly spaced with one another about said axis; and means for circulating a coolant in heat exchange relation with said second section.
Claim 9
Dependent Claim
13 words
The apparatus of claim 1 wherein: adjacent blades extend at reversed helical angle.
Claim 10
Dependent Claim
19 words
The apparatus of claim 7 wherein: the outer edges of the blades extend approximately 180 degrees about said axis.
Claim 11
Dependent Claim
33 words
The apparatus of claim 1 comprising: duct means extending through a wall portion of said barrel adjacent the connection of said barrel sections for introducing a fluid into the interior of the barrel.
Claim 12
Dependent Claim
27 words
The apparatus of claim 1 wherein: at least one of said blades has substantially flat end portions occurring in planes containing the longitudinal axis of the apparatus.
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |