POOL AND SPA FILTER
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United States of America Patent
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Issued Date -
Dec 20, 2007
app pub date -
May 14, 2007
filing date -
May 12, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A filter cartridge comprises a filter medium including a plurality of layers of a spunbond nonwoven fabric of continuous filaments. The filter medium may also include one or more additional layers such as a thermal or resin bonded carded nonwoven fabric, a hydroentangled nonwoven fabric or a fabric formed from caustic cotton fibers. The filter medium is formed into a pleated configuration. The filter medium may suitably comprise from 2 to 15 layers of the nonwoven fabric that are bonded to one another to form a relatively stiff multi-layer structure. The overall thickness of the filter medium is preferably from 0.25 to 3 mm.
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