Integral supported filter medium assembly

Details Integral supported filter medium assembly Integral supported filter medium assembly

1987-06-25

1991-10-15

Dawson, Robert A.

Liquid purification or separation

Plural distinct separators

Filters

210486, 2104941, B01D 2939, B01D 2933

Patent

active

050572172

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.

REFERENCES:
patent: 3279616 (1966-10-01), Bourdale
patent: 3358843 (1967-12-01), Bourdale
patent: 3486627 (1969-12-01), Ashby et al.
patent: 3623614 (1971-11-01), Schmidt, Jr.
patent: 3737036 (1973-06-01), Kasten
patent: 4045350 (1977-08-01), Kupf et al.
patent: 4229304 (1980-10-01), Fismer
patent: 4256586 (1981-03-01), Roos et al.
patent: 4637876 (1987-01-01), Dausoudil

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