Abstract: The apparatus includes a bushing, a cooling assembly, a sizing applicator, a glass filament gathering pad and a winder. A tip section of the bushing is provided with rows of tips having orifices from which streams of molten glass are attenuated into filaments. The tip section is recessed within an insulated frame that supports the bushing so that the insulated frame reflects heat back to the outer tip rows. The glass filaments are drawn from the bushing tips by the winder with the gathering pad functioning to gather the filaments together into a strand which is wound on the winder. Finned cooling tubes or a combination of finned cooling tubes and finless cooling tubes are located beneath the bushing in proximity to and between at least some of the rows of tips to maintain a more uniform temperature among the glass globules issuing from the tips in the various rows. The cooling tubes and fins are fabricated of an alloy having a major portion of palladium and a minor portion of ruthenium.

Abstract: A fiberizing bushing having a plurality of cooling tube alignment members spaced from the tip plate of the bushing wherein only a small portion of the space is filled with a refractory cement.

Abstract: An oval cooling tube for the central portion of a fiberizing bushing having a plurality of parallel cooling fins attached to the sides thereof.