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.
申请公布号
US5057217(A)
申请公布日期
1991.10.15
申请号
US19870066281
申请日期
1987.06.25
申请人
W. L. GORE & ASSOCIATES, INC.
发明人
LUTZ, JOHN H.;MANNISO, JAMES L.;RINSCHLER, CRAIG R.;SMITH, GORDON R. S.