Abstract: Bushings and bushing assemblies for supplying molten vitreous material in the form of exudations to be attenuated into filaments include a heat resistant cushioning material is provided under at least a portion of the flange portion of the bushing to thereby accommodate any thermal expansion of the bushing with respect to the insulation castable refractory material used to cement the bushing in place. The end walls of the bushing are contoured to thereby uniformly distribute the operating stresses occurring in the area of the junction of the flange and the side walls and the end walls of the bushing when the bushing is heated.

Abstract: A fiber glass production bushing is described utilizing a flat precious metal plate which is preferably supported by a nonprecious metal support plate. The support plate has slots cut in it so that the rows of depending fiber glass tips can project through it and yet be electrically isolated from the support plate by an air gap. The side and end walls of the bushing are provided by the bushing block located above the tip plate.