Patent ID: 6723147
Filing Date: 2004-04-20
Classification: B01D,B41J,Y10S,Y10T

Abstract:
An air-permeable filter for an ink cartridge, said air-permeable filter comprising:a laminate comprising: at least one porous material layer comprising at least one resin selected from the group consisting of fluororesin and polyolefin resin; and at least one air-permeable substrate layer having a tensile strength of 1 MPa or more; and having an outer surface bonded to said at least one porous material layer; and one of a heat weld, ultrasonic weld, vibrational weld, and adhesive for bonding said at least one air-permeable substrate layer to said at least one porous material layer, wherein a Gurley number of said air-permeable filter is less than 100 sec/100 ml.