Patent US2384456A successfully refreshed from Google Patents.
US4029459A
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US
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Method and apparatus for manufacture of granulates from pulverulent, granular, doughy or similar material
Assignee: GUNTHER PAPENMEIER KG
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Filing: 1975-01-20
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Granted: 1977-06-14
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Expires: 1995-01-20
Abstract
Abstract Method and various embodiments of apparatus for producing granulates from pulverulent, granular, doughy or similar material. Material to be granulated is continuously fed into the apparatus and formed into a skin of the material in the nip spaces between adjacent and cooperating rotating curved surfaces. The skin and material alternately progresses and is moved backwards axially of the rotating surfaces and is periodically and repeatedly kneaded as it is conveyed by the rotating surfaces towards and away from and finally forced through outlet apertures whereupon it is divided up into granulates. The apparatus can be in various embodiments which use paired, skinforming rotating curved surfaces and can be the surfaces of rollers or of at least two rollers cooperating with the internal surface of a drum. Helical lands or grooves can be incorporated in one or a combination of the paired rotating surfaces.
Inventors
- 👤 Jurgen Schmiedeke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/20; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B30; B30B; B30B11/00; B30B11/22; Y; Y10; Y10S; Y10S425/00; Y10S425/23
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
219 words
Apparatus for producing granulates from pulverulent, granular, doughy or similar material, such as plastics, comprising: a plurality of members including means having closely adjacent but spaced apart rotating curved surfaces, providing an elongate nip zone where the rotating surfaces are approaching each other; means adjacent one of said curved surfaces for continuously feeding material into one portion of said nip zone; said rotating surfaces having surface formations structured to provide, at said zone, periodic and repeated kneading action on the material causing it to be formed as a skin and conveyed in the axial direction and along the length of the adjacent portions of the rotating surfaces; additional means, including one of said rotating surfaces, for receiving the material after a passage through said nip zone and structured so as to convey the material in the opposite direction as a skin on one of the rotating surfaces; means providing apertures in at least one of said members adjacent said nip zone and spaced axially from said portion of said nip zone where material is fed, said rotating structured surface formations providing a force on and, after alternate directions of movement of said material, causing kneaded material to pass through said apertures; and means located at the exit side of said apertures for granulating the material extruded from said apertures.
Claim 2
Dependent Claim
219 words
Apparatus for producing granulates from pulverulent, granular, doughy or similar material, such as plastics, comprising: a plurality of members including means having closely adjacent but spaced apart rotating curved surfaces, providing an elongate nip zone where the rotating surfaces are approaching each other; means adjacent one of said curved surfaces for continuously feeding material into one portion of said nip zone; said rotating surfaces having surface formations structured to provide, at said zone, periodic and repeated kneading action on the material causing it to be formed as a skin and conveyed in the axial direction and along the length of the adjacent portions of the rotating surfaces; additional means, including one of said rotating surfaces, for receiving the material after a passage through said nip zone and structured so as to convey the material in the opposite direction as a skin on one of the rotating surfaces; means providing apertures in at least one of said members adjacent said nip zone and spaced axially from said portion of said nip zone where material is fed, said rotating structured surface formations providing a force on and, after alternate directions of movement of said material, causing kneaded material to pass through said apertures; and means located at the exit side of said apertures for granulating the material extruded from said apertures.
Claim 3
Dependent Claim
55 words
Apparatus as defined in claim 1, wherein the surface formation of at least one of said rotating surfaces has at least one helical profiling, at one end of which the feeding means for the material to be granulated is disposed, and said material outlet apertures being disposed at the other end of said helical profiling.
Claim 4
Dependent Claim
21 words
Apparatus as defined in claim 1, wherein at least one of said rotating curved surfaces is the surface of a roller.
Claim 5
Dependent Claim
21 words
Apparatus as defined in claim 3, wherein one of said rotating curved surfaces is the surface of a hollow drum device.
Claim 6
Dependent Claim
54 words
Apparatus as defined in claim 4, wherein the surface formations of at least one of said surfaces has at least one helical profiling, at one end of which the feeding means for the material to be granulated is disposed, and said material outlet apertures being disposed at the other end of said helical profiling.
Claim 7
Dependent Claim
17 words
Apparatus as defined in claim 5, wherein the surface with the helical profiling is the roller surface.
Claim 8
Dependent Claim
20 words
Apparatus as defined in claim 5, wherein the surface with the helical profiling is the inner surface of said drum.
Claim 9
Dependent Claim
31 words
Apparatus as defined in claim 1, wherein at least three different rotating surfaces are provided and cooperate to form two nips arcuately spaced apart and adjacent one of the rotating surfaces.
Claim 10
Dependent Claim
33 words
Apparatus as defined in claim 8, wherein profiling is provided on at least two of said surfaces and said profilings on one surface have a pitch different from that on the other surface.
Claim 11
Dependent Claim
14 words
Apparatus as defined in claim 9, wherein both profiled surfaces are formed on rollers.
Claim 12
Dependent Claim
14 words
Apparatus as defined in claim 10, wherein the axes of said rollers are parallel.
Claim 13
Dependent Claim
17 words
Apparatus as defined in claim 8, wherein means are provided for rotating said means with rotating surfaces.
Claim 14
Dependent Claim
26 words
Apparatus as defined in claim 12, wherein said rotating means drives one of said rotating surfaces at a different speed from another of said rotating surfaces.
Claim 15
Dependent Claim
35 words
Apparatus as defined in claim 8, wherein two surfaces are the outer surface of two rollers and one surface is the surface of a drum with which the roller surfaces cooperate to provide two nips.
Claim 16
Dependent Claim
17 words
Apparatus as defined in claim 14, wherein the surface of said drum is the exterior drum surface.
Claim 17
Dependent Claim
17 words
Apparatus as defined in claim 14, wherein the surface of said drum is the interior drum surface.
Claim 18
Dependent Claim
19 words
Apparatus as defined in claim 14, wherein helical profiling of different pitch are provided on the two roller surfaces.
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |