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Class Information
Number: 264/171.27
Name: Plastic and nonmetallic article shaping or treating: processes > Forming continuous or indefinite length work > Layered, stratified traversely of length, or multiphase macrostructure containing material (e.g., conjugate, composite, islands-in-sea, core-sheath, etc.) > Producing hollow composite > Having three or more layers of at least two different materials
Description: Processes directed to a hollow composite which has more than two layers wherein the material comprising at least one of the layers is dissimilar.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
4798751 Heat shrinkable multilayer film for primal meat packaging Jan. 17, 1989
4798526 Modular extrusion head Jan. 17, 1989
4784594 Single lip rotary tubular extrusion die Nov. 15, 1988
4783299 Method and apparatus for extrusion of plastic pipes with composite walls Nov. 8, 1988
4773450 Interlining of fluid transport pipelines, pipes, and the like Sep. 27, 1988
4770837 Method for making articles from polymer blends Sep. 13, 1988
4731002 Triple-wall foam coextrusion apparatus Mar. 15, 1988
4728478 Polymer films containing platelet particles Mar. 1, 1988
4723902 Balanced flow extrusion crosshead and die assembly Feb. 9, 1988
4702867 Method for continuously vulcanizing hoses Oct. 27, 1987
4649004 Process for production of multi-layer pipes for draw-forming Mar. 10, 1987
4643927 Tubular, multi-layer film and method of making Feb. 17, 1987
4640313 Interlining of pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and the like Feb. 3, 1987
4636346 Preparing guiding catheter Jan. 13, 1987
4622199 Process for extruding high molecular weight, high density linear ethylene polymers to form heavy tubular members Nov. 11, 1986
4617433 Pressure-sensitive conductive strip switch assembly and a method of manufacturing the same Oct. 14, 1986
4600616 Heat-shrinkable laminate film Jul. 15, 1986
4590028 Process for making a multilayered parison of thermoplastic material May. 20, 1986
4578025 Die assembly for extruding multilayer parisons Mar. 25, 1986
4541983 Preparing heat resistant heat shrinkable films Sep. 17, 1985
4537222 High-pressure hose and method for the manufacture of same Aug. 27, 1985
4537736 Method for curing a flexible hose Aug. 27, 1985
4522775 Apparatus and method for producing multilayered laminates Jun. 11, 1985
4519863 Method and device for jacketing a steel pipe with several plastic materials May. 28, 1985
4515737 Process for producing composite plastic pipe May. 7, 1985
4512943 Extrusion process for producing thermoplastic pipe Apr. 23, 1985
4510007 Method of jacketing steel pipes Apr. 9, 1985
4507071 Coextrusion apparatus for producing multiple layered thermoplastic pipe Mar. 26, 1985
4501779 Heat resistant heat shrinkable film Feb. 26, 1985
4499041 Coextrusion process for producing multiple layered thermoplastic pipe Feb. 12, 1985
4496516 Process for forming oriented multi-layer films having a different orientation distribution between layers Jan. 29, 1985
4490316 Apparatus and method for controlling internal size of an extruded hose Dec. 25, 1984
4484883 Multi-layer extrusion die Nov. 27, 1984
4465449 Coextrusion feedblock for making lightweight, rigid thermoplastic pipe Aug. 14, 1984
4451413 Jacketing steel tubes and pipes May. 29, 1984
4447378 Method of producing a composite foam wire reinforced hose May. 8, 1984
4436568 In situ precipitated fibrous laminate and method of producing same Mar. 13, 1984
4435241 Method of extruding laminated film Mar. 6, 1984
4412882 Method for producing composite pipes Nov. 1, 1983
4410587 Co-extruded fusible net Oct. 18, 1983
4403934 Coextrusion die Sep. 13, 1983
4402898 Coextrusion die assembly Sep. 6, 1983
4397797 Method for extrusion coating of a pipe with a foamed cover layer having three integrally formed cellular sub-layers Aug. 9, 1983
4395221 Tubular extrusion apparatus Jul. 26, 1983
4390581 Moulding Jun. 28, 1983
4386628 Maintenance lining of passageways Jun. 7, 1983
4384024 Composite heat-sealable films May. 17, 1983
4379117 Method for preparing a film of vinylidene chloride polymer Apr. 5, 1983
4377545 Method of making corrugated reinforced thermoplastic pipe Mar. 22, 1983
4374079 Method and apparatus for manufacturing expanded and layered semiround plastic tubings Feb. 15, 1983

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