US3554274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling mixer for preparing plastic material
Assignee: Individual
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Filing: 1969-01-02
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Granted: 1971-01-12
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Expires: 1989-01-02
Abstract
Abstract A heating and cooling mixing device consisting of a heating mixer for heating the plastic material rapidly, and a cooling mixer for subsequently rapidly cooling the material under an almost continuous operation. The centrifugal heating-mixing apparatus contains a three-step mixing device for achieving a homogenous and fast mixing, as well as fast heating, The cooling mixer is also a centrifugal mixer and includes on the driving shaft, a plurality of cooling rings. Cooling means also flow through the jacket of the device. Within the cooling mixer, helically formed lines are provided at the outside ends of the mixing fans which effect and intensive flow of the mixed plastic material within the range of the walls of the device. The cooling rings and the mixing fans may be provided singularly, or all together. This provides a large warming transfer face with a large relative movement of material so as to create a device having a high cooling power.
Inventors
- 👤 Friedrich W Herfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:53
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/02; B29B7/06; B29B7/10; B29B7/12; B29B7/16; B01; B01F; B01F33/00; B01F33/80; B01F33/81; B29B13/00; B29B13/02; B29B13/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
151 words
A heating and cooling mixing device for preparing material mixtures comprising; a centrifugal heating mixer having a slide control outlet nozzle coupled to one side thereof; a vertical three-way mixing device having a drive shaft coupled through its bottom wall; lower mixing blades secured to said drive shaft for moving the material to be mixed upwardly; upper mixing blades coupled to said drive shaft for moving the material to be mixed downwardly; center blades coupled to said drive shaft having oppositely arranged inner folds and outer folds so that the inner folds move the mixed material downwardly while the outer folds move the mixed material upwardly; a centrifugal cooling mixer coupled to said outlet nozzle and having a wall with a flow through cooling media, said heating mixer outlet nozzle serving as a charging inlet; and a slide control discharging nozzle secured to said cooling mixer for discharging the finished mixture.
Claim 2
Dependent Claim
151 words
A heating and cooling mixing device for preparing material mixtures comprising; a centrifugal heating mixer having a slide control outlet nozzle coupled to one side thereof; a vertical three-way mixing device having a drive shaft coupled through its bottom wall; lower mixing blades secured to said drive shaft for moving the material to be mixed upwardly; upper mixing blades coupled to said drive shaft for moving the material to be mixed downwardly; center blades coupled to said drive shaft having oppositely arranged inner folds and outer folds so that the inner folds move the mixed material downwardly while the outer folds move the mixed material upwardly; a centrifugal cooling mixer coupled to said outlet nozzle and having a wall with a flow through cooling media, said heating mixer outlet nozzle serving as a charging inlet; and a slide control discharging nozzle secured to said cooling mixer for discharging the finished mixture.
Claim 3
Dependent Claim
61 words
The mixing device in accordance with claim 1, wherein said lower mixing blades are profiled to correspond to the bottom wall of the mixing container, said blades extending close to the bottom of said mixing container and close to the width of the container, whereby the upper surface of each of the lowermost blade is turned upwardly against its rotational movement.
Claim 4
Dependent Claim
77 words
The mixing device according to claim 1 wherein each of said center mixing blades comprises a back beam section, and oppositely attached folded inner and outer key parts, whereby the inner key edge is aligned above the circumferential plane of the outer blades and key edge of the outer key part beneath the circumferential plane of the center blade, said inner key part of each of the center mixing blade being longer than said outer key part.
Claim 5
Dependent Claim
37 words
The mixing device as claimed in claim 3 wherein said upper mixing blades cover between one-half and three-quarters of the width of the mixing containers of the lower side of each blade moving upwardly in rotational direction.
Claim 6
Dependent Claim
34 words
The mixing device according to claim 4 comprising hub pieces disposed axially on said mixing shaft and exchangeable spacer pieces disposed axially on said mixing shaft between said hub pieces for said mixing blades.
Claim 7
Dependent Claim
60 words
The mixing device according to claim 5, wherein said cooling mixer is mounted on a vertical drive shaft having centrifugal mixing blades above the bottom of the mixing container, and a plurality of cooling rings disposed above said mixing blades and carried on arms thereof so that said driving shaft as well as said arms serve as cool conducting guides.
Claim 8
Dependent Claim
30 words
The mixing device according to claim 6 wherein said mixing blades are mounted on the outerside of each of said cooling rings to that the said blades are directed upwardly.
Claim 9
Dependent Claim
38 words
The mixing device according to claim 7 wherein each of said cooling rings includes two ring plates, and an inner and outer ring pipe, said parts being connected to each other presenting a ring channel having rectangular diameter.
Claim 10
Dependent Claim
99 words
The mixing apparatus according to claim 8 comprising hubs for supporting each of said cooling rings, said hubs having internal radial arms with longitudinal channels positioned opposite to each other, said channels serving as cooling guides and feed backs for the cooling media, said longitudinal channels of each of said hubs being sealed with respect to each other wherein one of said radial arms cuts one of the corresponding hubs, said driving shaft includes concentric lead lines for guiding and feeding back the cooling medIa, said concentric lead lines being connected with the lowermost hub and longitudinal channels thereof.
Claim 11
Dependent Claim
56 words
The mixing apparatus according to claim 6 wherein said cooling mixer comprises centrifugal mixing blades disposed adjacent to the bottom thereof, said blades including its outer end thereof upwardly directed screwlike cams which are directed against the direction of rotation, the outside edges of which are parallel and adjacent to the wall of the mixing container.
Claim 12
Dependent Claim
32 words
The mixing apparatus according to claim 10, wherein the cross section which is pointed inwardly is inclined with respect to the radial rotation and includes a cutout on its back portion thereof.
Claim 13
Dependent Claim
24 words
The mixing apparatus according to claim 11 wherein the ratio of length with respect to width of the cam blades is at least 5:
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |