US Patent No: 6,626,206
Number of patents in Portfolio can not be more than 2000
Feedblock for adjusting the dimensions of a set of co-extruded layers of a multi-layer sheet
Stats
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Sep 30, 2003
Issued date -
Jan 20, 2000
filing date -
09/496,022
serial no -
Expired
status
Importance
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Abstract
A feedblock for supplying a multi-layer stream of polymeric material to an extrusion die is provided wherein the dimension of at least some of the layers of the multi-layer stream can be precisely adjusted and/or controlled. The feedblock includes a primary flow path which is used to create a first layer and two secondary flow paths which are used to create a set of second and third layers. The secondary flow paths are positioned relative to the primary flow path such that the second and third layers are deposited on opposing sides of the primary layer in a sandwich-like configuration. Each of the secondary flow paths include a contoured slot through which a secondary fluid stream of polymeric material is deposited onto a primary stream of polymeric fluid flowing in the primary flow path. The contoured slot is geometrically shaped such that adjusting the position of the contoured slot alters the shape of the secondary fluid stream as it is deposited onto the primary flow path. A set of heaters disposed within the feedblock are positioned on either side of the combined primary and secondary flow paths adjacent to the exit port of the feedblock and are used to heat the secondary streams thereby altering the flow characteristics of the streams which, in turn, causes a corresponding change in the dimensions and profiles of the secondary fluid streams.
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First Claim
Related Publications
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International Classification(s)
- [Classification Symbol]
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,122,905 Relective polymeric body | 187 | 1990 | |
| 5,122,906 Thick/very thin multilayer reflective polymeric body | 137 | 1990 | |
| 5,126,880 Polymeric reflective bodies with multiple layer types | 119 | 1990 | |
| 5,094,788 Interfacial surface generator | 143 | 1990 | |
| 5,269,995 Coextrusion of multilayer articles using protective boundary layers and apparatus therefor | 230 | 1992 | |
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| 4,784,815 Edge-laminating apparatus and process | 20 | 1987 | |
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| 4,780,258 Coextruded laminate having barrier layers | 21 | 1987 | |
| 5,066,443 Dual barrier laminate process | 12 | 1990 | |
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| 5,020,984 Apparatus for adjusting die lip gap | 20 | 1990 | |
| 5,120,484 Coextrusion nozzle and process | 28 | 1991 | |
| 5,147,195 Extrusion apparatus with adjustable flow-restricting member | 20 | 1991 | |
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| 4,533,308 Multimanifold extrusion die and coextrusion process | 39 | 1984 | |
| 4,619,802 Die with combining adaptor insert and melt-lamination process | 31 | 1984 | |
| 4,600,550 Coextrusion process for overcoming the curtaining effect | 28 | 1985 | |
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| 4,443,397 Multiple-layered sheeting apparatus and process therefor | 17 | 1982 | |
| 4,483,669 Multiple-layered sheeting apparatus | 12 | 1983 | |
| 4,483,812 Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same | 15 | 1983 | |
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| 4,695,236 Apparatus for continuous extrusion of a multilayer synthetic resin web | 37 | 1985 | |
| 4,756,858 Extruding a thermoplastic laminate with recycled trimmings | 15 | 1987 | |
| 4,880,370 Extrusion die for multilayer foils or plates of thermoplastic synthetic resin | 13 | 1988 | |
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| 4,524,099 Coextruded elastomeric films | 25 | 1983 | |
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| 5,375,990 Feed block for coextrusion apparatus | 5 | 1992 | |
| 5,780,067 Adjustable coextrusion feedblock | 8 | 1996 | |
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| 4,185,951 Apparatus for the extrusion of patterned sheets of thermoplastic synthetic resins | 18 | 1977 | |
| 4,562,023 Process and apparatus for producing a synthetic resin sheet having a colored band of varying color intensity | 22 | 1983 | |
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| 5,110,276 Extrusion die assembly | 26 | 1989 | |
| 5,238,385 Extrusion die assembly | 19 | 1992 | |
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| 5,106,562 Extrusion methods and apparatus | 17 | 1989 | |
| 5,102,323 Plastic resin multi-layer co-extrusion extruder with multi-port plug for selecting order of layers | 6 | 1990 | |
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| 4,469,130 Adjustable orifice for reaction injection molding | 6 | 1982 | |
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| 4,573,493 Sequentially controlled water mixer | 12 | 1984 | |
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| 4,281,683 Modular multiple-fluid component selection and delivery system | 26 | 1980 | |
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| 4,470,790 Adjustable extrusion die assembly | 17 | 1983 | |
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| 4,439,125 Adjustable die mechanism | 33 | 1982 | |
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| 4,295,812 Ribbon cable extrusion crosshead | 10 | 1980 | |
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| 5,223,276 Multilayer coextrusion apparatus | 16 | 1991 | |
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| 5,236,642 Multiple layer sheet materials, and packages, and methods and apparatus for making | 19 | 1989 | |
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| 4,521,359 Method of coextruding plastics to form a composite sheet | 28 | 1981 | |
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| 5,489,402 Method for regulatiing the individual layer thicknesses of a coextruded multilayer plastic web | 7 | 1994 | |
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| 5,234,020 Mixer valve for hot and cold water with two independent controls | 5 | 1992 | |
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| 4,240,782 Extruder head for making elastomer-fiber composite hose | 14 | 1979 | |
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| 4,552,521 Apparatus for co-extruding a rubber strip of one material with a stripe of a second material | 15 | 1984 | |
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| 5,137,675 Apparatus and method for coextruding materials having different temperature dependent properties | 31 | 1991 | |
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| 4,484,883 Multi-layer extrusion die | 25 | 1983 | |
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| 4,289,560 Method of making laminates of thermoplastic polymers by a single-channel coextrusion process and melt injector block for use therein | 14 | 1979 | |
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| 4,669,965 Multi-layer extrusion die | 17 | 1984 | |
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| 4,395,217 Adaptor for extruding a plurality of streams of synthetic thermoplastic foam simultaneously from a single extruder | 31 | 1981 | |
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| 4,422,839 Exit die | 20 | 1981 | |
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| 5,711,349 Flow divider with diverter valve | 7 | 1997 | |
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| 4,708,617 Screw extruder with a rotatable barrel section | 15 | 1986 | |
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| 4,911,628 Triwall siding apparatus | 30 | 1988 | |
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| RE34711 Device for feeding an extrusion head for plastic material | 2 | 1991 | |
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| 5,573,720 Extrusion of thermally cross-linkable materials | 4 | 1995 | |
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| 4,435,141 Multicomponent continuous film die | 31 | 1982 | |
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| 5,066,435 Process and system for producing multi-layer extrudate | 56 | 1990 | |
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| 4,316,868 Extruding colored thermoplastic resin sheets | 26 | 1980 | |
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| 4,652,225 Feed block for a flat coextrusion die | 29 | 1986 | |
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| 4,405,547 Method of coextruding diverse materials | 45 | 1982 | |
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| 5,094,793 Methods and apparatus for generating interfacial surfaces | 130 | 1990 | |
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| 5,211,898 Method and apparatus for feeding a plurality of molten resin jet streams into T die | 19 | 1991 | |
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| 4,285,655 Coat hanger die | 22 | 1979 | |
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| 5,088,909 Apparatus for extruding a marbleized synthetic-resin strand | 4 | 1991 | |
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| 4,533,510 Method and apparatus for continuously co-extruding a sheet | 44 | 1983 | |
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| 4,197,069 Variable thickness extrusion die | 67 | 1978 | |
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| 4,189,292 Extruding head for making reticulated seamless tubes | 7 | 1978 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 30, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |