Patent ID: 9266043
Filing Date: 2016-02-23
CPC Classification: B01D,B82Y

Claim Text:
1. A filter cartridge comprising: an inner filter in the form of an approximately cylindrical corrugated membrane; an outer filter in the form of an approximately cylindrical corrugated membrane, wherein the outer filter has a diameter greater than that of the inner filter and is installed around the inner filter to define a space between the inner filter and the outer filter; and at least one holder to support the inner filter and the outer filter, wherein both ends of each of the inner filter and the outer filter in the form of a corrugated membrane are bonded to each other so as to be in an approximately cylindrical shape, wherein a protrusion of the inner filter is disposed within a recess of the outer filter, wherein an inner bonded portion of the inner filter is oriented to face the outer filter, and an outer bonded portion of the outer filter is oriented to face the inner filter in such a way that the inner bonded portion and the outer bonded portion remain within the space, wherein at least a part of the inner bonded portion and at least a part of the outer bonded portion are overlapped with each other, and wherein the inner bonded portion and the outer bonded portion are bonded by an organic adhesive, whereby fine dust particles generated at the bonded portions when water moves outward through the outer filter or moves inward through the inner filter are confined between the outer filter and the inner filter.