Patent ID: 6170298
Filing Date: 2001-01-09
Classification: C03B,Y02P

Abstract:
A fibre spinning head comprising:(1) a circumferential extrusion rim with a spinning face perforated by extrusion orifices;(2) feed means for delivering molten extrusion material within said head;(3) two vertically displaced, upper and lower non-intercommunicating interior compartments located within said head on the inner side of the extrusion rim and positioned to receive molten material from the feed means, each of the compartments communicating with distinct, separated non-overlapping zones of extrusion orifices formed on the spinning face,wherein the feed means allocates differing quantities of molten material to the respective compartments to provide greater quantities of molten extrusion material to be fed to the upper compartment than to the lower compartment and wherein said feed means comprises a glass delivery means by which a molten glass stream is directed alternately into the respective upper and lower compartments in a specific mass distribution ratio to provide different mass flow rates for the respective zones of extrusion orifices.