Tyre beading formed by continuously coating - wire ring

摘要

Core a ring for beading, preferably of endless wound wire, is rotated an simultaneously coated by applying an unvulcanised rubber thread onto it by external pressure. Thread issues continuously from an extruder, hanging as a free loop of variable depth before it enters beading machine. Preferably riong is rotated as function of loop depth, which is sensed photoelectrically.