Abstract:
The present invention provides a deep gradient-density filter device capable of effectively filtering a fluid containing a distribution of particles in the range of approximately 25 microns to approximately 0.2 micron at a fluid velocity of at least approximately 100 cm/hr and an initial hydraulic permeability of greater than approximately 10 cm/hr/psi. The deep gradient-density filter device comprises several layers of filtration material, each having specific predetermined particle retention properties. In one product embodiment of the present invention, the deep gradient-density filter device uses "loose" fibrillated cellulose fiber material as a primary filter element. In a method aspect of the invention, the deep gradient-density filter device is used for either the secondary clarification of industrial-scale cultured or fermented protein-containing biopharmaceutical fluids or the primary clarification of pilot?scale volumes of said fluids.
Abstract:
The invention concerns a filtration unit with a cartridge-like filter element for the filtration of fluids. The filtration unit does not have a separate back-pressure protection. The cartridge-like filter element is mounted in a surrounding housing with flow channels on the inside of the tubular housing wall. The flow channels are in communicating contact with at least one fluid connection. The invention comprises a reduced number of structural parts, has an even ratio between the filter element flow and the housing wall flow when the dead volume is low and is characterized by its filtration power and its longer endurance and working life. The filtration unit can be used, for example, in the form of filter cartridges or filter capsules in the chemical, electronic, pharmaceutical, cosmetic, biotechnological food and drinks industry, in laboratories and in the field of environmental protection. Depending on the filter equipment of the cartridge-like filter element the filter unit can be used, for example, for preliminary and end filtration in the field of reverse osmosis and ultra and micro filtration of different media including sterile filtration.
Abstract:
A depth filter (59) formed of a plurality of substantially continuous intertwined filaments (51, 52) including a central support zone formed of support filaments (51) having a first diameter and a filter zone formed of filtration filaments (52) having filaments of a second diameter in which the diameters are different or the filaments are constructed of different materials. The invention also relates to an apparatus and a method for making such a depth filter element.
Abstract:
A fluid filter is formed by manufacturing an air laid batt containing randomly disposed structural fibers and a thermoplastic binder fiber. The interstices between the fibers are fixed by applying a latex resin to the batt, thereby fixing the pore sizes of the filtering media before the filtering media is molded. The filtering media is then molded into shape by using a plunger to tuck the media into an open cavity mold. The mold may be heated and pressure may be applied to the batt to mold the batt.
Abstract:
A filter device (10) includes a casing (30) having an inlet (31a) for introducing fluid and an outlet (32a) for discharging fluid, and a filtering element (20) disposed between the inlet (31 a) and the outlet (32a). The filtering element (20) has an outer circumference face (21) restricted from being deformed in a fluid flowing direction. The filtering element (20) has an upstream end face (23) on an upstream side in the fluid flowing direction, and a downstream end face (24) on a downstream side in the fluid flowing direction. The filtering element (20) is configured to be compressed toward the upstream end face (23) by pressing the downstream end face (24).
Abstract:
An in-tank fuel filter includes a body having upper and lower panels comprising an outer shell or layer of extruded mesh, layers of spun bonded and melt blown filtration media and a fitting for mounting the filter to an in-tank fuel pump inlet. The outer layer of the body is extruded mesh material that has the general appearance of a woven fabric but includes connections at every filament intersection. This outer layer protects the finer, inner filtration layers which include a first layer of spun bonded material, a layer of melt blown filtration media defining smaller pore sizes and a second layer of spun bonded material. The mounting fitting is made of a fuel compatible material and may either be a multiple part device or be in-situ molded on one of the filter panels. Separating ribs or a stuffer may be disposed in the interior of the filter to prevent its collapse and improve fuel withdrawal through the mounting fitting.
Abstract:
PROBLEM TO BE SOLVED: To provide a disposable integrated filter unit 10 which is suitable for primary and/or secondary purification of a chemical fluid. SOLUTION: This disposable integrated filter unit comprises a plurality of filter plates 20n which have an inlet 40 and an outlet 60 and are inserted into between a pair of end plates 24, 26. The filter plates 20n comprises a polymer frame structure 28, and a deep gradient filter packet 35 is buried within a polymer frame structure 28. The filter plates and end plates constitute a substantially fixed integrated laminate as a whole. Before a fluid introduced into the disposable integrated filter unit 10 through the inlet 40 is discharged from the unit 10 through the outlet 60, the fluid is passed through the deep gradient filter packet 35 in each filter plate 20n in a substantially simultaneous (that is, "parallel") manner. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
A pleated filter element includes a composite depth filter medium formed into a plurality of pleats. The composite depth filter medium includes a plurality of depth filter media layers. Each of the plurality of depth filter media layers includes adsorber particulate matter. Each of the plurality of depth filter media layers may have a thickness less than about 1300 microns. The plurality of depth filter media layers may have at least 50% by weight of adsorber particulate matter.
Abstract:
The present invention provides a deep gradient-density filter device capable of effectively filtering a fluid containing a distribution of particles in the range of approximately 25 microns to approximately 0.2 micron at a fluid velocity of at least approximately 100 cm/hr and an initial hydraulic permeability of greater than approximately 10 cm/hr/psi. The deep gradient-density filter device comprises several layers of filtration material, each having specific predetermined particle retention properties. In one product embodiment of the present invention, the deep gradient-density filter device uses "loose" fibrillated cellulose fiber material as a primary filter element. In a method aspect of the invention, the deep gradient-density filter device is used for either the secondary clarification of industrial-scale cultured or fermented protein-containing biopharmaceutical fluids or the primary clarification of pilot-scale volumes of said fluids.
Abstract:
A new non-woven depth filter element (126) is formed in a continuous process whereby a mass of very fine diameter polymer filaments (132) overlaid by mass of larger diameter polymer filaments (136) are continuously accumulated on a spinning mandrel (110) and advanced along and off of the mandrel (110) by a press roller (124). An inner cylindrical surface (134) of the cumulative filament mass forming the depth filter element is calendared, which facilitates insertion of a core member.