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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
4368017 Apparatus for film extrusion comprising rotary die parts Jan. 11, 1983
4364981 Three layer film having a core layer of low pressure, low density polyethylene Dec. 21, 1982
4364882 Process and an apparatus for the extrusion of plastic pipes with composite walls Dec. 21, 1982
4359354 Method of forming self-sealing tire body composite for tires Nov. 16, 1982
4327053 Blow molding hollow articles from polyolefins containing anisotropic filler Apr. 27, 1982
4304616 Radially shrinkable sleeves Dec. 8, 1981
4294638 Circular extrusion method providing for rotation around the extrusion opening Oct. 13, 1981
4293294 Circular extrusion apparatus providing for rotation around the extrusion opening Oct. 6, 1981
4285656 Tubular extrusion apparatus Aug. 25, 1981
4278738 Ethylene-vinyl acetate copolymer film laminate Jul. 14, 1981
4275768 Reinforced hose having embedded indicia strip Jun. 30, 1981
4265848 Method for the production of a medical instrument May. 5, 1981
4247584 Composition comprising a blend of EVA polymers having differing VA contents; films and laminates made therefrom by extrusion; and heat-sealed food bags made from the laminates Jan. 27, 1981
4244914 Process for preparing gas-, vapor- and odor-proof coupled and coextruded multilayer articles of thermoplastic material and closed-surface bodies comprising the same Jan. 13, 1981
4240993 Multi-layer film containing a layer of crosslinked ethylene/vinyl alcohol copolymer Dec. 23, 1980
4236953 Process for producing thermoplastic multi-walled pipes Dec. 2, 1980
4233367 Coextruded multilayer film Nov. 11, 1980
4226822 Biaxially stretched five-layer film and method for manufacture thereof Oct. 7, 1980
4205034 Method for making a reinforced tubular article May. 27, 1980
4203715 Rotating joint for extrusion die May. 20, 1980
4196464 Semi-conductive layer-containing reinforced pressure hose and method of making same Apr. 1, 1980
4183882 Self-welding packaging film Jan. 15, 1980
4158033 Halogenated butyl interlayer for reinforced elastomeric hose articles Jun. 12, 1979
4157194 Thermoplastic multi-walled pipes Jun. 5, 1979
4134952 Method and die for forming laminated tubular structures of synthetic resins Jan. 16, 1979
4130616 Tubular extrudate Dec. 19, 1978
4126262 All-plastic heat-sealable container material and method of making Nov. 21, 1978
4123589 Polyurethanes and food casing made therefrom particularly by extrusion and stretching Oct. 31, 1978
4116738 Continuous production of tubular modular filter elements using nonwoven webs from thermoplastic fibers and products Sep. 26, 1978
4113819 Method and apparatus for continuously manufacturing multi-layered dough materials Sep. 12, 1978
4112031 Process and apparatus for producing rubber hose with textile thread reinforcing Sep. 5, 1978
4106967 Hose construction and method of making same Aug. 15, 1978
4101699 Synthetic resinous tube Jul. 18, 1978
4082877 Unoriented composite laminar film with an elastomeric layer and sealable layer Apr. 4, 1978
4079850 Multi-layer blow molded container and process for preparation thereof Mar. 21, 1978
4048428 Method for preparing a film of vinylidene chloride polymer Sep. 13, 1977
4047868 Multilayer parison extrusion molding machine for blow molding Sep. 13, 1977
4041198 Apparatus and method for forming water stops on insulated pipe Aug. 9, 1977
4033929 Plastic skin envelopes for glass bottles and the like Jul. 5, 1977
4031162 Polymer film with narrow molecular weight distribution and saran and laminates thereof Jun. 21, 1977
4026985 Shirred tubular food casings having a barrier coating May. 31, 1977
4007070 Method of constructing a hose Feb. 8, 1977
3999929 Apparatus for feeding core material Dec. 28, 1976
3997383 Cross-linked amide/olefin polymeric laminates Dec. 14, 1976
3994761 Method of making hose Nov. 30, 1976
3988189 Method of constructing a hose Oct. 26, 1976
3966861 Composite tubular film process and apparatus Jun. 29, 1976
3962396 Process for manufacturing a triple-wall container Jun. 8, 1976
3957942 Process of coating an elongated support May. 18, 1976
3953557 Polymer film with narrow molecular weight distribution and saran and laminates thereof Apr. 27, 1976

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