Abstract: The disclosure embraces a method of and apparatus for transferring heat from streams of glass flowing from a feeder through the use of a closed hollow heat exchanger unit or instrumentality containing a working fluid for rapidly absorbing heat from intensely hot glass streams to raise the viscosity of the glass of the streams to enable attenuation of the streams to fibers and thereby attain increased throughput of glass and higher production of fibers.

Abstract: Apparatus for and the method of producing a sliver-like fibrous product including forming glass fibers, conveying the glass fibers in a body of gas and depositing them on the porous rim of a rotating wheel to form a coherent web, advancing the porous rim with the web thereon over an opening having a progressively reducing size in the direction of rim movement, establishing a zone of reduced pressure within the wheel to draw air through the fibers into the opening to progressively condense the web into a loosely associated longitudinal coherent sliver-like grouping of fibers, and discharging the longitudinal sliver-like fiber grouping from the rim.