| abstract |
The method comprises the steps of providing a grooved drum (41), disposing the tensile unit (13) about said drum, then disposing the first polymeric material (16), in a non-cured form thereof about the tensile unit (13), then subjecting the drum (41) to heat and pressure to cause the first material (16) to be forced toward the drum (41) and exude through the tensile unit (13) adjacent the grooves (42) and into the grooves (42) to at least partially form the teeth (14), then substantially immediately cooling the first material (16) and the drum (41) to stop the curing of the first material so that the first material is generally in a non-cured condition, then disposing the second material (21) in a non-cured form thereof about the tensile unit (13), and then again subjecting the drum (41) to heat and pressure to cause the first (16) and second (21) material to be forced toward the drum (41) and to be cured together (10). |