Integral supported filter medium assembly
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United States of America Patent
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Oct 15, 1991
Grant Date -
N/A
app pub date -
Jun 25, 1987
filing date -
Jun 25, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An integral filter leaf assembly comprising microporous polymeric filter cloths heat-bonded to the apices of an undulating screen to form a strong unitary pressure resistant filter unit which essentially replaces filter leaf assemblies. The screen and felt sides of the filter cloths are preferably heat sealable thermoplastics, usually polypropylene to allow heat-bonding and heat-sealing of seams throughout for a unitary assembly strong in compression. Outer filter coat is preferably porous expanded polytetrafluoroethylene. Optionally, a circumferential stiff load-bearing frame may be enclosed within the assembly.
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