US3734471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for continuous mixing of solids with liquids
Assignee: Draiswerke GmbH
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Filing: 1971-08-31
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Granted: 1973-05-22
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Expires: 1991-08-31
Abstract
Abstract A method and device for uniformly wetting wood chips with glue in which the wood chips are propelled along a helical path with the glue being applied by centrifugal action concentrically and radially in finely dispersed form.
Inventors
- 👤 K Engels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
B; B27; B27N; B27N1/00; B27N1/02; B27N1/0227; B27N1/0236; B27N1/0245; B01; B01F; B01F27/00; B01F27/60; B01F27/62; B01F27/621; B01F35/00; B01F35/90; B01F35/92; B01F35/95; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/44; B29B7/74; B29B7/7461; B29B7/80; B29B7/82; B29B7/826; B29B7/88; B29B7/90; B29B7/92; B29B7/94; B01F27/05; B01F27/11; B01F27/112; B29B7/46; B29B7/48; B29B7/481; B29B7/7476; B29B7/7485
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
183 words
Apparatus for the continuous mixing of solids with liquids, preferably for the application of glue to chips, fibers or powdered materials, comprising: a cylindrical mixing trough, a material-feed funnel at one end of said mixing trough and a material outlet at the other end of said mixing trough; said mixing trough having mounted coaxially therein at least one mixing shaft, means to drive said mixing shaft, said shaft being provided with mixing arms for the axial propulsion of the material through said trough in the form of a ring of material contiguous with the trough wall; wherein the mixer shaft has a hollow inner space and carries at least one fluid feed tube, and means to spray liquid into the ring of material contiguous with the trough wall and being propelled through said trough, said spraying means comprising liquid spray tubes mounted on said mixing shaft and projecting therefrom, aid spray tubes having a liquid receiving end for receiving fluid from said fluid feed tube, said spray tubes being sufficiently long to project into the ring of material contiguous with the trough wall.
Claim 2
Dependent Claim
183 words
Apparatus for the continuous mixing of solids with liquids, preferably for the application of glue to chips, fibers or powdered materials, comprising: a cylindrical mixing trough, a material-feed funnel at one end of said mixing trough and a material outlet at the other end of said mixing trough; said mixing trough having mounted coaxially therein at least one mixing shaft, means to drive said mixing shaft, said shaft being provided with mixing arms for the axial propulsion of the material through said trough in the form of a ring of material contiguous with the trough wall; wherein the mixer shaft has a hollow inner space and carries at least one fluid feed tube, and means to spray liquid into the ring of material contiguous with the trough wall and being propelled through said trough, said spraying means comprising liquid spray tubes mounted on said mixing shaft and projecting therefrom, aid spray tubes having a liquid receiving end for receiving fluid from said fluid feed tube, said spray tubes being sufficiently long to project into the ring of material contiguous with the trough wall.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1, wherein said liquid spraying tubes are different lengths.
Claim 4
Dependent Claim
32 words
Apparatus according to claim 1, wherein more than one said feed tube is present and said tubes have outlets in said shaft only at specified locations along the length of said shaft.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 1, wherein two removable and replaceable feed tubes are mounted on the mixing shaft.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 1, wherein said mixing elements are in the form of liquid spraying tubes.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 1, wherein said mixing elements are hollow paddles, connected to a cooling circuit enclosed in said hollow shaft.
Claim 8
Dependent Claim
36 words
Apparatus according to claim 1, comprising a cooling circuit mounted on the mixing shaft and wherein said at least one liquid feed tube with liquid spraying tubes are mounted on the exterior of said mixing shaft.
Claim 9
Dependent Claim
29 words
Apparatus according to claim 1, wherein said liquid spraying tubes are arranged along an area of at least 20 percent of the mixing trough length, on the mixing shaft.
Claim 10
Dependent Claim
33 words
Apparatus according to claim 1 wherein the mixing elements arms are displaced 180* relative to each other and are arranged only along approximately half the length of the trough, on the mixing shaft.
Claim 11
Dependent Claim
47 words
Apparatus according to claim 1, comprising a second trough with mixers is arranged axially parallel to said first trough and connected thereto by an axially parallel connection, so that the distance between the mixer axes is less than the sum of the diameters of the adjacent mixers.
Claim 12
Dependent Claim
48 words
Apparatus according to claim 1 wherein: the mixing trough is divided axially into an upper part anD a lower part; a portion of the lower part of said mixing trough is removable; and the material feed pipes and material outlet pipes are tangentially attached to said lower parts.
Claim 13
Dependent Claim
42 words
Apparatus according to claim 1, further comprising an impact area adjacent said material feed pipe and a protective conveyor belt covering said impact area of the material feed pipe, with the direction of travel of said belt being toward said mixing trough.
Claim 14
Dependent Claim
23 words
Apparatus according to claim 1, comprising an operable throttle valve at the material outlet pipe, said valve being operable by said driving means.
Claim 15
Dependent Claim
26 words
Apparatus according to claim 1, wherein said liquid spraying tubes are each provided with a valve that opens to allow liquid to flow only during operation.
Claim 16
Dependent Claim
47 words
Apparatus according to claim 1 wherein said mixing arms, especially in the area of the liquid spraying tubes, are pitched to provide zero propulsion at their outer ends, located in the vicinity of the mixing trough wall, while their propulsive effect increases steadily toward the mixing shaft.
Claim 17
Dependent Claim
20 words
Apparatus according to claim 1, further comprising a slower-running equalizer premixer with overflow means connected ahead of said inlet pipe.
Claim 18
Dependent Claim
23 words
An apparatus in accordance with claim 1 wherein said fluid feed tube is carried within said hollow inner space of said mixer shaft.
Claim 19
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein said hollow mixer shaft carries said fluid feed tube on the exterior thereof.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |