US4128386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the extrusion of patterned sheets or panels of thermoplastic synthetic resin compositions
Assignee: Dynamit Nobel AG
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Filing: 1976-08-04
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Granted: 1978-12-05
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Expires: 1996-08-04
Abstract
Abstract A process for extruding patterned sheets or panels of differently colored thermoplastic synthetic resin compositions which include the steps of distributing additional color compositions outside of an extrusion duct of a basic color composition over a number of individual feed channels and introducing the additional color compositions at right angles to the direction of flow of the basic color composition into the interior of the stream of the basic color composition at locations over the width and thickness in an initial flow zone via said channels.
Inventors
- 👤 Waldemar Wissinger
- 👤 Kurt Webermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:43
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/17; B29C48/175; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/9258; B29C2948/926; B29C2948/92742; B29C2948/92752; B29C2948/92819; B29C2948/92857; B29C2948/92904
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
198 words
An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising: (a) a long-slot extruder head for extruding the patterned sheets or panels, said extruder head having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head, from said inlet means for introducing said basic color composition to the extruder head, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising at least one feed channel, said at least one feed channel being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) a long-slot extrusion die in flow communication with said at least one feed channel for feeding said at least one additional colored thermoplastic resin composition to said at least one feed channel.
Claim 2
Independent Claim
198 words
An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising: (a) a long-slot extruder head for extruding the patterned sheets or panels, said extruder head having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head, from said inlet means for introducing said basic color composition to the extruder head, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising at least one feed channel, said at least one feed channel being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) a long-slot extrusion die in flow communication with said at least one feed channel for feeding said at least one additional colored thermoplastic resin composition to said at least one feed channel.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein the at least one feed channel extends into the initial flow zone.
Claim 4
Dependent Claim
22 words
An apparatus according to claim 2, wherein the at least one feed channel extends into the initial flow zone at varying depths.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 1, having a plurality of feed channels and wherein the feed channels extend into the initial flow zone from upper and lower die halves of the long-slot extruder head.
Claim 6
Dependent Claim
29 words
An apparatus according to claim 1, wherein the at least one feed channel is fashioned as radial bores in the wall of a cylindrical sleeve serving as the support.
Claim 7
Dependent Claim
32 words
An apparatus according to claim 5, wherein the at least one feed channel terminates in projections of the sleeve affecting the flow conditions in the initial flow zone by its cross-sectional configuration.
Claim 8
Dependent Claim
41 words
An apparatus according to claim 6, wherein at least one rotatably movable slide is arranged between said long-slot extrusion die and said at least one feed channel to interrupt the color composition stream exiting from said at least one feed channel.
Claim 9
Dependent Claim
46 words
An apparatus according to claim 7, wherein the at least one rotatably movable slide is provided with helically extending outer grooves and with a central, axial middle bore such that the outer grooves are in communication with the middle bore via a plurality of individual bores.
Claim 10
Dependent Claim
25 words
An apparatus according to claim 8, wherein the at least one rotating slide is disposed within the support of said at least one feed channel.
Claim 11
Dependent Claim
26 words
An apparatus according to claim 9, wherein the rear edges, as seen in the flow direction, of said at least one feed channel are under cut.
Claim 12
Dependent Claim
41 words
An apparatus according to claim 6, wherein at least one axially movable slide is arranged between said long-slot extrusion die and said at least one feed channel to interrupt the color composition stream exiting from said at least one feed channel.
Claim 13
Dependent Claim
40 words
An apparatus according to claim 1, wherein said at least one feed channel is arranged in the wall of said long-slot extruder head defining the width of the initial flow zone and extends approximately at right angles to the wall.
Claim 14
Dependent Claim
42 words
An apparatus according to claim 1, wherein said long-slot extrusion die feeds said at least one additional colored thermoplastic resin composition to all of the feed channels, whereby each feed channel is fed with the color composition stream under the same conditions.
Claim 15
Independent Claim
199 words
An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising: (a) extruder head means for extruding the patterned sheets or panels, said extruder head means having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head means having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head means, from the inlet means for introducing said basic color composition to said head means, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising a plurality of feed channels, said plurality of feed channels being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) extrusion die means, in flow communication with said plurality of feed channels, for uniformly feeding said at least one additional colored thermoplastic resin composition to all of said plurality of feed channels.
Claim 16
Independent Claim
199 words
An apparatus for the extrusion of patterned sheets or panels of a basic color thermoplastic resin composition having at least one additional colored thermoplastic resin composition therein, comprising: (a) extruder head means for extruding the patterned sheets or panels, said extruder head means having inlet means for introducing said basic color thermoplastic resin composition to the extruder head, said extruder head means having an initial flow zone therein, said initial flow zone being downstream, in the direction of flow of the basic color thermoplastic resin composition through the extruder head means, from the inlet means for introducing said basic color composition to said head means, (b) means for adding at least one additional color thermoplastic resin composition to said basic color composition, said means being positioned to feed directly into said initial flow zone and comprising a plurality of feed channels, said plurality of feed channels being constructed on a support that is insertable in the walls of the long-slot extruder head and is exchangeable, and (c) extrusion die means, in flow communication with said plurality of feed channels, for uniformly feeding said at least one additional colored thermoplastic resin composition to all of said plurality of feed channels.
Claim 17
Dependent Claim
39 words
The apparatus according to claim 14, wherein the plurality of feed channels is arranged in a wall of said extruder head means defining the width of the initial flow zone and extends approximately at right angles to the wall.
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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |