Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...
Patent
1989-04-14
1990-04-17
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Coating or impregnating workpiece before molding or shaping...
264149, 264171, 2641771, 26417716, 26417719, 2641772, 264178R, 26421118, 264234, 264237, 264285, 264321, 264322, 264339, 264342RE, 264DIG65, 427244, B29C 4702, B29C 5304, B32B 3130
Patent
active
049178474
ABSTRACT:
A reverse osmosis water purification module has an enclosed cylindrical housing in which at least twelve purification elements are mounted in a uniform, spaced parallel fashion. Each element consists of a long flat member having a thermoplastic sheet backing formed into a slightly curved cross section and having a semi-permeable membrane disposed thereon. The backing has three-dimensional porosity for purified water such that water passing through the membrane portion of the element travels along the backing member to an end. The ends of the module are mounted in a collection manifold which is sealed off from the remainder of the housing interior. A method of manufacturing the elements continuously is also provided wherein a continuous length of flexible backing material is fed sequentially through a heater, a forming die to impart a curved cross-section to the backing material, an extruder wherein membrane forming fluid is extruded around the periphery of the backing, a chill bath and a heating bath. After passing through the various process steps, the continuous length of material is cut into elements of desired lengths.
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Tentoni Leo B.
Thurlow Jeffery
Wetco of Delaware, Inc.
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