Bushing assembly for drawing of glass fibers

Abstract From the Canadian patent

A bushing assembly employing an orifice plate having a perforated drawing area with a planar undersurface against which bulk gas flow is directed for cooling and fiber attenuation purposes. The bushing assembly is removably secured beneath a flow block having a flow passage and comprises a block of refractory material having a flow chamber extending therethrough in alignment with the flow passage. The flow chamber is lined with a platinum foil lining and the orifice plate is joined to the lining and extends over the lower end of the chamber. The orifice plate has an unperforated collection area at the sides of the perforated drawing area, and a deflector plate is secured to the platinum …