Patent US4605309A successfully refreshed from Google Patents.
US4605309A
Expired / Lapsed
US
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Mixing and shearing roller-mill
Assignee: COLOR METAL DR-ING ALBERS MASCHINENBAU Firma GmbH
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Filing: 1985-01-09
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Granted: 1986-08-12
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Expires: 2005-01-09
Abstract
Abstract A roller-mill for mixing and plasticizing materials, comprises two tempered, rotatable rollers which are operable at different circumferential speeds. The rolls are long and are provided with angular grooves which are inclinedly disposed relative to the axis of rotation of the rolls. The grooves on the two rolls extend in opposite directions to one another. The grooves producing biaxial shearing in the nip between the rolls because material is reliably fed into the nip. The grooves also produce a simultaneous, axial conveying of the material. Along the roll nip, various materials which are to be mixed can feed-in simultaneously or successively and, depending upon the intended purpose of the end product, the materials are removed from the device for further processing in either a partially plasticized state or in a fully homogenized state, as desired.
Inventors
- 👤 August Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:47
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/56; B29B7/562; B29B7/564; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/36; B29C48/375; B29C48/387; B29C48/465
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
222 words
A mixing and shearing roller-mill for plasticisable material comprising first and second rotatable, tempered rolls, each said roll defining a longitudinal axis, said rotation being effected about said longitudinal axis, drive means for each said roll for rotating said rolls at different speeds relative to one another, each said roll having an axial length and a diameter, said axial length being at least four times greater than said diameter, each said roll including an external surface, said external surface defining grooved portions, the transition regions between said surface and each said groove being sharp-edged, each said groove being inclinedly disposed at an acute angle relative to said roll axis, said grooves on said first roll having an opposite hand to said grooves on said second roll, each said roll defining first and second axial end regions and a central region intermediate said end regions, said material feed means disposed in said first end region and material discharge means disposed in said second end region, the number and depth of said grooves increasing from said first end region to said central region and decreasing from said central region to said second end region, said rolls jointly defining a roll nip therebetween and adjustable feed and discharge means for feeding and discharging different types of material and additives axially disposed along said roll nip.
Claim 2
Dependent Claim
222 words
A mixing and shearing roller-mill for plasticisable material comprising first and second rotatable, tempered rolls, each said roll defining a longitudinal axis, said rotation being effected about said longitudinal axis, drive means for each said roll for rotating said rolls at different speeds relative to one another, each said roll having an axial length and a diameter, said axial length being at least four times greater than said diameter, each said roll including an external surface, said external surface defining grooved portions, the transition regions between said surface and each said groove being sharp-edged, each said groove being inclinedly disposed at an acute angle relative to said roll axis, said grooves on said first roll having an opposite hand to said grooves on said second roll, each said roll defining first and second axial end regions and a central region intermediate said end regions, said material feed means disposed in said first end region and material discharge means disposed in said second end region, the number and depth of said grooves increasing from said first end region to said central region and decreasing from said central region to said second end region, said rolls jointly defining a roll nip therebetween and adjustable feed and discharge means for feeding and discharging different types of material and additives axially disposed along said roll nip.
Claim 3
Dependent Claim
27 words
A roller-mill as recited in claim 1, in which the grooves which extend inclinedly relative to the roll axes at an angle of from 5° to 45°.
Claim 4
Dependent Claim
39 words
A roller-mill as recited in claim 1 wherein said grooves extend angularly relative to said external surface of said roll, each said groove having a cross-section selected from the group consisting of semi-circular, U-shaped and part-rectangular with rounded corners.
Claim 5
Dependent Claim
45 words
A roller-mill as recited in claim 1 wherein at said feed end and at said discharge end, said grooves are 0.5 mm to 10 mm deep, 1 mm to 50 mm wide and are spaced from 5 mm to 100 mm apart from one another.
Claim 6
Dependent Claim
72 words
A roller-mill as recited in claim 1 wherein said adjustable feed means for feeding said materials to be mixed and plasticised are axially adjusted so that said materials are successively introduced into said roll nip in a pre-determined plasticised state, said materials also being discharged in a pre-determined plasticised state by means of said axially displaceable discharging devices, said material then being fed to a feed hopper of a subsequent treatment device.
Claim 7
Dependent Claim
40 words
A roller-mill as recited in claim 1 wherein means are provided for said forcibly pressing said material into said grooves, said means being selected from the group consisting of geared or toothed-wheel pumps, sprocket chain feed means and piston rams.
Claim 8
Dependent Claim
33 words
A roller-mill as recited in claim 6, wherein said device additionally includes speed-regulated geared pump means coupled to said discharge means for discharging processed material and nozzle means for extruding said discharged material.
Claim 9
Dependent Claim
53 words
A roller-mill as recited in claim 6, wherein said discharge ends of said roll each include a continuous groove profile, each said roll terminating in conically inwardly-tapering tip means, said device further including casing means disposed around said discharge end region of each said roll and acting as an extrusion and pressure element.
Claim 10
Dependent Claim
51 words
A roller-mill as recited in claim 6, wherein said rolls are profiled from said first end to said material discharge point and are conically inwardly-tapered, said device further including casing means shaped so as to correspond to the conicity of said rolls disposed around said discharge end region of said rolls.
Claim 11
Dependent Claim
37 words
A roller-mill as recited in claim 7 wherein said rolls are of differing axial lengths, the longer of said rolls being provided with a continuous groove profile, said device further including casing means receiving said longer roll.
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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |