US3705778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastifying apparatus
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1970-03-12
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Granted: 1972-12-12
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Expires: 1990-03-12
Abstract
Abstract A plastifying apparatus is disclosed. A rotatable roller has arranged angularly spaced with reference to its periphery a plurality of gap-forming elements each of which defines with the periphery a wedge-shaped gap which tapers in direction of rotation of the roller. Feed means feeds material to be plastified into the first one of the gaps for successive movement through this and the following gaps as the roller rotates, whereby the material undergoes successive plastification steps.
Inventors
- 👤 Heinrich Collin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/54; B29B13/00; B29B13/02; B29B13/022
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
178 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising in combination a roller having a periphery; a plurality of stationary elements angularly spaced about said roller and having respective surfaces spaced from and defining with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of said roller and which have downstream ends extending with slight spacing in at least substantial parallelism with the axis of said roller, said gaps including an initial and a terminal gap; heating means associated with said stationary elements for heating the same; and feed means for feeding plastifiable material into the initial one of said gaps over the entire length thereof, for successive movement of such material through all of said gaps in response to rotation of said roller so that such material becomes plastified in said gaps by heating by said stationary elements heated by said heating means associated with said stationary elements and converted into a foil which is discharged from the terminal one of said gaps.
Claim 2
Independent Claim
178 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising in combination a roller having a periphery; a plurality of stationary elements angularly spaced about said roller and having respective surfaces spaced from and defining with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of said roller and which have downstream ends extending with slight spacing in at least substantial parallelism with the axis of said roller, said gaps including an initial and a terminal gap; heating means associated with said stationary elements for heating the same; and feed means for feeding plastifiable material into the initial one of said gaps over the entire length thereof, for successive movement of such material through all of said gaps in response to rotation of said roller so that such material becomes plastified in said gaps by heating by said stationary elements heated by said heating means associated with said stationary elements and converted into a foil which is discharged from the terminal one of said gaps.
Claim 3
Dependent Claim
25 words
An apparatus as defined in claim 1, said gaps having respective upstream and downstream end regions which are each concavely curved inwardly towards said periphery.
Claim 4
Dependent Claim
19 words
An apparatus as defined in claim 1; further comprising adjusting means for adjusting the taper of the respective gaps.
Claim 5
Dependent Claim
19 words
An apparatus as defined in claim 1, said plurality of elements comprising between four and six of said elements.
Claim 6
Dependent Claim
14 words
An apparatus as defined in claim 1, said surfaces each being a flat surface.
Claim 7
Independent Claim
162 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising a rotatable roller having a periphery; a plurality of stationary elements substantially longitudinally coextensive with said roller angularly spaced thereabout, at least two of said elements being unitary with one another in form of a member having a face directed towards said roller and provided with a plurality of grooves extending in axial parallelism with said roller and being bounded by groove surfaces which define with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of the roller and include an initial and a terminal gap; and feed means for feeding material into the initial one of said gaps over the entire length thereof, for successive movement of such material through and processing in all of said gaps in response to rotation of said roller, and for discharge of the processed material from the terminal one of said gaps.
Claim 8
Independent Claim
162 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising a rotatable roller having a periphery; a plurality of stationary elements substantially longitudinally coextensive with said roller angularly spaced thereabout, at least two of said elements being unitary with one another in form of a member having a face directed towards said roller and provided with a plurality of grooves extending in axial parallelism with said roller and being bounded by groove surfaces which define with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of the roller and include an initial and a terminal gap; and feed means for feeding material into the initial one of said gaps over the entire length thereof, for successive movement of such material through and processing in all of said gaps in response to rotation of said roller, and for discharge of the processed material from the terminal one of said gaps.
Claim 9
Dependent Claim
29 words
An apparatus as defined in claim 5, wherein the respective flat surface includes with a tangent to the periphery of said roller an angle of between 0* and 45*.
Claim 10
Dependent Claim
16 words
An apparatus as defined in claim 7, wherein said angle is between substantially 15* and 30*.
Claim 11
Dependent Claim
35 words
An apparatus as defined in claim 6, said plurality of elements comprising at least one additional member similar to the first-mentioned member and being angularly spaced with reference to the latter and to said periphery.
Claim 12
Dependent Claim
23 words
An apparatus as defined in claim 6, said groove faces including with respective tangents to said periphery angles of between 0* and 30*.
Claim 13
Dependent Claim
19 words
An apparatus as defined in claim 10, wherein said angles are on the order of between 10* and 20*.
Claim 14
Dependent Claim
35 words
An apparatus as defined in claim 10, said gaps having respective upstream and downstream ends, and wherein said upstream ends have upstream end regions which are concavely curved inwardly towards said periphery of said roller.
Claim 15
Dependent Claim
24 words
An apparatus as defined in claim 6; further comprising adjusting means for adjusting the taper of at least said terminal one of said gaps.
Claim 16
Dependent Claim
26 words
An apparatus as defined in claim 6; further comprising adjustable mounting means mounting said member for tilting movement with reference to said periphery of said roller.
Claim 17
Dependent Claim
39 words
An apparatus as defined in claim 2, wherein said downstream end regions are curved so as to include with a tangent opposite to the direction of rotation of said roller an included angle of between substantially 90* and 150*.
Claim 18
Dependent Claim
15 words
An apparatus as defined in claim 15, wherein said included angle is below substantially 135*.
Claim 19
Dependent Claim
30 words
An apparatus as defined in claim 15, wherein said upstream end regions are curved on a first radius, and said downstream end regions are curved on a smaller second radius.
Claim 20
Dependent Claim
28 words
An apparatus as defined in claim 17, wherein said first radius is greater than said second radius by between one-half and twice the amount of said second radius.
Claim 21
Independent Claim
143 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising a rotatable roller having a periphery; a plurality of stationary elements substantially longitudinally coextensive with said roller angularly spaced thereabout and defining with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of the roller and which include an initial and a terminal gap; feed means for feeding material into the initial one of said gaps over the entire length thereof, for successive movement of such material through and processing in all of said gaps in response to rotation of said roller, and for discharge of the processed material from the terminal one of said gaps; and shear surfaces downstream of the respective gaps and extending with slight spacing in at least substantial parallelism with said periphery of said roller.
Claim 22
Independent Claim
143 words
An apparatus for plastifying of materials, particularly of synthetic plastics, and for making foils from such materials, comprising a rotatable roller having a periphery; a plurality of stationary elements substantially longitudinally coextensive with said roller angularly spaced thereabout and defining with the periphery of said roller respective wedge-shaped gaps which taper in direction of rotation of the roller and which include an initial and a terminal gap; feed means for feeding material into the initial one of said gaps over the entire length thereof, for successive movement of such material through and processing in all of said gaps in response to rotation of said roller, and for discharge of the processed material from the terminal one of said gaps; and shear surfaces downstream of the respective gaps and extending with slight spacing in at least substantial parallelism with said periphery of said roller.
Claim 23
Dependent Claim
26 words
An apparatus as defined in claim 19, said shear surface having in direction of rotation of said roller a length between substantially 2 and 10 mm.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |