US3778036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for plasticizing and homogenizing viscous masses
Assignee: Individual
•
Filing: 1972-03-01
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Granted: 1973-12-11
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Expires: 1992-03-01
Abstract
Abstract A device for plasticizing and homogenizing viscous masses, especially plastics and rubber, in which processing of the material takes place between a rotating drum and a stationary semicylindrical trough partially surrounding the drum which, on the inner surface facing the drum, contains several mixing grooves each extending in a generally longitudinal direction along the inner surface of the trough structure and spaced circumferentially from each other. The grooves are interconnected by channels or slots so that they operate in a sequential manner cooperatively with the drum to properly mix the material introduced at the drum surface.
Inventors
- 👤 H Collin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:33
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/523; B29C48/00; B29C48/25; B29C48/36; B29C48/465; B29C48/03; B29C48/07; B29C48/08; B29L; B29L2007/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A device for plasticizing and homogenizing viscous masses comprising: a cylindrical drum rotatable about its longitudinal axis; a stationary semi-cylindrical trough partially surrounding said drum, the inner diameter of said trough substantially corresponding to the external diameter of said drum, the inner surface of said trough being formed with a plurality of mixing grooves each extending in a generally longitudinal direction and spaced circumferentially from each other, said grooves being interconnected by a plurality of shear channels oriented in a substantially circumferential direction, said shear channels being staggered in the longitudinal direction from groove to groove, said mixing grooves and shear channels forming a network of alternating more or less circumferentially and then more or less longitudinally oriented material conducting channels.
Claim 2
Independent Claim
121 words
A device for plasticizing and homogenizing viscous masses comprising: a cylindrical drum rotatable about its longitudinal axis; a stationary semi-cylindrical trough partially surrounding said drum, the inner diameter of said trough substantially corresponding to the external diameter of said drum, the inner surface of said trough being formed with a plurality of mixing grooves each extending in a generally longitudinal direction and spaced circumferentially from each other, said grooves being interconnected by a plurality of shear channels oriented in a substantially circumferential direction, said shear channels being staggered in the longitudinal direction from groove to groove, said mixing grooves and shear channels forming a network of alternating more or less circumferentially and then more or less longitudinally oriented material conducting channels.
Claim 3
Dependent Claim
51 words
The device according to claim 1, wherein a V-shaped conducting insertion area is formed at the entrance to said trough between said trough and said drum, said insertion area is divided in the approach to the first of said mixing grooves into single channels parallel to each other, oriented essentially circumferentially.
Claim 4
Dependent Claim
19 words
The device according to claim 1, wherein said mixing grooves are formed in said trough in the axial direction.
Claim 5
Dependent Claim
37 words
The device according to claim 1, wherein said mixing grooves form a zig-zag pattern in the generally longitudinal direction in the trough and adjacent grooves are staggered in the longitudinal direction by approximately half a zig-zag spacing.
Claim 6
Dependent Claim
23 words
The device according to claim 1, wherein said mixing grooves are parallel and are formed in the trough inclined to the axial direction.
Claim 7
Dependent Claim
61 words
ThE device according to claim 1, wherein said mixing grooves are formed as semi-circular cross-sectional channels with carefully rounded shape in the bottom of the grooves and with sharp edges at the transition to the trough surface, the angle between the sides of the grooves at the transition and the trough surface forming said sharp edges being not larger than 90*.
Claim 8
Dependent Claim
23 words
The device according to claim 6, wherein the cross-sectional areas of the mixing grooves become smaller in the direction of the drum rotation.
Claim 9
Dependent Claim
31 words
The device according to claim 1, wherein said shear channels formed in said trough between said grooves have decreasing depths from about 2 to 0.2mm in the direction of drum rotation.
Claim 10
Dependent Claim
26 words
The device according to claim 1, and further comprising a nozzle connected to the end of the trough for extruding the material in the radial direction.
Claim 11
Dependent Claim
36 words
The device according to claim 1, wherein said trough consists of two halves, which when spread out are maneuverable around a common axis and in the closed state present a completely solid or seamless inner contour.
Claim 12
Dependent Claim
62 words
The device according to claim 1 wherein said mixing grooves are formed as generally rectangular cross-sectional channels with carefully rounded corners in the bottom of the grooves and with sharp edges at the transition to the trough''s surface, the angle between the sides of the grooves at the transition and the trough''s surface forming said sharp edges being not larger than 90*.
References Cited (Backward Citations)
US2261257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |