METHOD FOR FORMING A COATING OF RUBBER OR A SYNTHETIC RESIN HAVING AN EVEN THICKNESS ON THE EXTERNAL SURFACE TUBULAR TEXTILE JACKET

摘要

A method for forming a coating of rubber or a synthetic resin having an even thickness on the external surface of a tubular textile jacket made of fibers woven or knitted in a tubular for, which comprises continuously passing the tubular textile jacket through one or more baths of a coating liquid and then solidifying the coating liquid attached to the external surface of the jacket, characterized in that an expanding assembly provided with plural expanding members which are capable of inflating the tubular textile jacket to almost circular or elliptical form in the cross section and are arranged at appropriate intervals in the longitudinal direction of the assembly is put in the interior space of the jacket and maintained in a definite position to the coating liquid in the baths, thereby keeping the jacket almost circular or elliptic in its cross section at least for a distance from the position where the tubular textile jacket departs from the bath of coating liquid to the position where fluidity of the coating liquid attached to the external surface of the jacket is substantially lost. The use of the expanding assembly provided with plural expanding member capable of inflating the tubular textile jacket by mechanical pressure which are arranged at appropriate intervals in the longitudinal direction of the assembly overcomes drawback in the prior arts and warrants a smooth coating operation for the jacket without trouble.