F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/28, 189/45,
F16L 9/00 (2006.01) F16L 11/00 (2006.01)
Patent
CA 1209493
Abstract of the Disclosure Reinforced flexible tubing of thermoplastic material is provided. The tubing includes a tubular core of thermo- plastic material having on the outer surface thereof a multi- plicity of contiguous formations integral with the core, the formations defining valleys therebetween, reinforcing material disposed on the outer surface of the core in intimate contact with the surface of the core and a coating of thermoplastic mate- rial covering the outer surface of the core and the reinforcing material, the thermoplastic material of the coating being directly and intimately bonded to the thermoplastic material of the core. Also provided is an apparatus for manufacturing rein- forced flexible tubing of thermoplastic material. The apparatus includes a core supply for supplying a flexible tubular core, a reinforcing material supply device for supplying reinforcing material to the outer surface of the core and an extruder arranged to extrude a coating of thermoplastic material onto the outer surface of the core and the reinforcing material, the extruder being adapted to enable a positive air pressure differ- ential to be applied between the exterior and interior of the coating around the core during extrusion of the coating. further provided is a method for manufacturing reinforced flex- ible tubing of thermoplastic material which includes providing a flexible tubular core of thermoplastic material, supplying rein- forcing material to the surface of the core and extruding, by means of an extruder, a thermoplastic coating on the outer sur- face of the tubular core and the reinforcing material while creating a positive air pressure differential between the exterior and interior of the coating in the extruder during extrusion to urge the coating into intimate contact with the core and the reinforcing material. The reinforced tubing of the invention permits a reduction of up to 30° of the material used to form the coating while maintaining the resistance to bursting.
440447
Copely James D.
Smart & Biggar
LandOfFree
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