Continuous filament yarn precoat septum
AssigneeMemtec America Corporation
InventorSteven D. Barboza
Life of this patent
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Abstract
A precoat septum in the form of a winding onto a core of textured yarn produced of continuous filaments of an organic or inorganic material. The yarn is texturized by air blowing a plurality of said filaments utilizing an air jet, and drawing off the filaments at a speed which is lower than the speed at which they enter the jet so that the resulting yarn is characterized by the filaments having a plurality of random entangled loops.
Claims24
In a precoat septum adapted to receive and support a particulate filter medium on the surface of said septum, said septum comprising a spiral winding of a yarn supported on a porous core, the improvement comprising:
- said spiral winding is a continuous filament yarn under tension, air jet textured to the extent that said filaments form a plurality of random entangled loops, with a sufficient degree of entanglement that said loops are not pulled out under the tension as wound on said core and when subjected to backwashing.
A particulate precoat filter comprising a particulate filter medium supported on the surface of a septum, said septum comprising a spiral winding of a yarn under tension supported on a porous core, said yarn comprising a continuous filament yarn air jet textured to the extent that said filaments form a plurality of random entangled loops, said loops having a sufficient degree of entanglement that such loops are not pulled out under tension as wound on said core.
Dependencies are inferred from the claim text.