Patent US3890083A successfully refreshed from Google Patents.
US3890083A
Expired / Lapsed
US
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Extrusion devices
Assignee: Industries Leco Inc
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Filing: 1973-05-30
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Granted: 1975-06-17
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Expires: 1993-05-30
Abstract
Abstract A rotatable coextrusion die permitting coextrusion of two or more extrudable materials to form a multi-layered extrudable product. The device comprises a die body with a central core disposed within an elongated bore in the die body and spaced therefrom to form a coextrusion flow path. The central core is comprised of a plurality of material spreading members which are successively positioned in the direction of movement of the material. Each of the spreading members includes a plate having multi-point star-like patterns on each of the opposite surfaces thereof thereby forming a plurality of circumferentially spaced radially extending flow passages which open into the coextrusion flow path. An individual feeding tube is associated with each of the spreading members and the associated feeding tubes at one end extend into the associated spreading member and opens into the flow passages on opposite sides of the spreading plate in each spreading member. At their opposite ends, the individual feeding tubes are connected to one or more sources of extrudable materials. The die body and the central core are rotatable together about a fixed axis and are also rotatable with respect to the feeding tubes. The method for making the multi-layered extrudable product is also disclosed.
Inventors
- 👤 Eve Daniel Robert St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:32
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/336; B29C48/3363; B29C48/03; B29C48/09; B29C48/10; B29C48/16; B29C48/18; B29C48/21; B29C48/33; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
139 words
A rotatable coextrusion die comprising an outer die body and feeding means for feeding at least two sources of extrudable material, said outer die body having a common annular flow path terminating in a die lip, a plurality of material spreading members located within said body, each such member being coMprised of a die-plate having a plurality of flow passages on opposite sides thereof and which communicate with said common annular flow path to provide a continuous flow of overlapping material streams, and said feeding means comprising at least two individual feeding means and each communicating with flow passages associated with one of said die-plates, each of said feeding means being adapted to feed an extrudable material to said flow passages, whereby all of the extrudable materials from each feeding means is combined to form a multi-layered extrudable material.
Claim 2
Dependent Claim
139 words
A rotatable coextrusion die comprising an outer die body and feeding means for feeding at least two sources of extrudable material, said outer die body having a common annular flow path terminating in a die lip, a plurality of material spreading members located within said body, each such member being coMprised of a die-plate having a plurality of flow passages on opposite sides thereof and which communicate with said common annular flow path to provide a continuous flow of overlapping material streams, and said feeding means comprising at least two individual feeding means and each communicating with flow passages associated with one of said die-plates, each of said feeding means being adapted to feed an extrudable material to said flow passages, whereby all of the extrudable materials from each feeding means is combined to form a multi-layered extrudable material.
Claim 3
Dependent Claim
34 words
The rotatable coextrusion die of claim 1 further characterized in that said feeding means and die body are rotatable relative to one another to thereby control the roll geometry of said multi-layered extrudable material.
Claim 4
Dependent Claim
147 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate forming a plurality of radially extending flow passages on opposite sides thereof and communicating with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 5
Dependent Claim
147 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate forming a plurality of radially extending flow passages on opposite sides thereof and communicating with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 6
Dependent Claim
35 words
The rotatable coextrusion die of claim 3 further characterized in that said feeding means and said die body are rotatable relative to one another to thereby control the roll geometry of said multi-layered extrudable material.
Claim 7
Dependent Claim
25 words
The rotatable coextrusion die of claim 3 further characterized in that said die body and said central core are rotatable relative to said feeding means.
Claim 8
Dependent Claim
36 words
The rotatable extrusion die of claim 3 further characterized in that said die body and said central core are mounted for simultaneous rotation about a fixed axis and are rotatable relative to a fixed feeding means.
Claim 9
Dependent Claim
34 words
The rotatable coextrusion die of claim 3 further characterized in that star-like spreader patterns are formed on each side of said mandrel forming plates and which form said plurality of radially extending flow passages.
Claim 10
Dependent Claim
19 words
The rotatable coextrusion die of claim 7 further characterized in that said star-like spreader patterns are six-point star patterns.
Claim 11
Dependent Claim
211 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate constructed with star-like spreader patterns on each side of each said mandrel forming plate thereby forming a plurality of radially extending flow passages on each of the opposite sides of said mandrel forming plates which flow passages communicate with said coextrusion flow path to provide a continuous overlapping flow of material streams, said radially extending flow passages being circumferentially spaced from each other on each side of each said plates and the passages on one side of each of said plates being offset from the flow passages on the other side thereof, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extRudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 12
Dependent Claim
211 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate constructed with star-like spreader patterns on each side of each said mandrel forming plate thereby forming a plurality of radially extending flow passages on each of the opposite sides of said mandrel forming plates which flow passages communicate with said coextrusion flow path to provide a continuous overlapping flow of material streams, said radially extending flow passages being circumferentially spaced from each other on each side of each said plates and the passages on one side of each of said plates being offset from the flow passages on the other side thereof, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extRudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 13
Dependent Claim
35 words
The rotatable coextrusion die of claim 9 further characterized in that said feeding means and said die body are rotatable relative to one another to thereby control the roll geometry of said multi-layered extrudable material.
Claim 14
Dependent Claim
25 words
The rotatable coextrusion die of claim 9 further characterized in that said die body and said central core are rotatable relative to said feeding means.
Claim 15
Dependent Claim
36 words
The rotatable coextrusion die of claim 9 further characterized in that said die body and said central core are mounted for simultaneous rotation about a fixed axis and are rotatable relative to a fixed feeding means.
Claim 16
Dependent Claim
175 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate forming a plurality of radially extending flow passages on opposite sides thereof and communicating with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual tubular feeding duct operatively associated with each of said material spreading members and each tubular feeding duct operatively opening at one end into the radially extending flow passages on the plate with which it is associated to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path, the other ends of each said tubular feeding duct being adapted for connection to a source of extrudable material.
Claim 17
Dependent Claim
175 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a mandrel forming plate forming a plurality of radially extending flow passages on opposite sides thereof and communicating with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual tubular feeding duct operatively associated with each of said material spreading members and each tubular feeding duct operatively opening at one end into the radially extending flow passages on the plate with which it is associated to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path, the other ends of each said tubular feeding duct being adapted for connection to a source of extrudable material.
Claim 18
Dependent Claim
49 words
The rotatable coextrusion die of claim 13 further characterized in that each of said tubular feeding ducts extends into said plates somewhat centrally thereof and opens into the flow passages on both the opposite sides thereof, and each of said tubular feeding ducts extending in a common axial direction.
Claim 19
Dependent Claim
183 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a die base and a mandrel forming plate disposed in operative relationship to said die base and forming annular material receiving die gap therebetween, said mandrel forming plate also forming a plurality of radially extending flow passages on opposite sides thereof which open into said annular material receiving die gap and which also communicate with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 20
Dependent Claim
183 words
A rotatable coextrusion die permitting coextrusion of a plurality of extrudable materials, said die comprising an outer die body, a central core disposed within said outer die body forming an annular coextrusion flow path therebetween, said central core being comprised of a plurality of material spreading members successively positioned in the direction of movement of said extrudable materials, each of said spreading members including a die base and a mandrel forming plate disposed in operative relationship to said die base and forming annular material receiving die gap therebetween, said mandrel forming plate also forming a plurality of radially extending flow passages on opposite sides thereof which open into said annular material receiving die gap and which also communicate with said coextrusion flow path to provide a continuous overlapping flow of material streams, and an individual feeding means operatively associated with each of said material spreading members and each feeding means communicating with the flow passages associated with one of said spreading members to deliver an extrudable material thereto, so that each of said extrudable materials may be combined in said coextrusion flow path.
Claim 21
Dependent Claim
53 words
The rotable coextrusion die of claim 15 further characterized in that a die mandrel is operatively mounted in conjunctive relationship to said die base and mandrel forming plate, and a die ring is operatively located around said die mandrel to continue the annular material passageway between said die mandrel and said die ring.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |