RUBBERISED FABRIC

In a pneumatic tyre, that portion of the structure which holds the tyre on the wheel it consists of a circular assembly of steel wires insulated with rubber, suitably wrapped and covered with rubberised fabric to enable the bead assembly to be built into the uncured casing. 

A hollow roller of wood or metal with an internal square housing to fit a suitable shaft, used for winding up fabric, rubber sheet, rubberised fabric, linings, etc. also termed roller or box. Shore Durometer See Durometer. 

A rubberised fabric belt used for the transmission of power. In cross-section the belt is rectangular with sloping sides similar to the upper part of a letter V it operates between sheaves into which the V-shape fits. 

The wire beads used are produced from a combination of multi-strand copper, zinc or brass coated high-tensile steel wires. The required number of wires are formed into the required shape and then passed through a cross-head extruder to be coated with rubber compound. The coated wire layers are then formed into a coiled ring and the free wire ends secured together. For certain heavy duty applications use is made of either a light weight rubberised fabric or a small fibre filled rubber sheet to cover the joint area. In some cases the bead construction is also partially vulcanised. 

Generally a belt consists of a carcass made of rubberised fabric, steel cord and the rubber top. The carcass is the tension member. This is covered on the top, the edges and the bottom with different qualities of rubber compounds to protect the tension member from damage and the rubber acts as a binder in addition to its primary function of protecting the belt against the wear. 

An assembly of plies of rubberised cord fabric used in building or making the casing of a pneumatic tyre. 

---