Filtration Article Containing A Filtration Material Having Twisted Pleats Therein

摘要

A filtration device having therein a pleated, twisted filtration material is provided. The filtration material has a generally cylindrical shape and includes a first end, a second end opposing the first end, and outwardly projecting pleats. The pleats have a non-linear orientation within the filtration device. The twisting of the filtration material moves the ends of the pleats a distance around the circumference of the filtration material from a first position (P1) to a second position (P2). The angle of rotation may range from about 5 degrees to about 1440 degrees. Twisting the filtration material increases the effective amount of filtration material in the filtration device, which in turn, corresponds to an increase in the Effective Filtration Area (EFA). The intentional misalignment of the pleat ends in the filtration material improves the cutting ability of the material, removes buckling of the material, and improves the quality of the trim cut.

主权项

1. A filter cartridge assembly comprising:
an outer cage; a filtration material having a cylindrical configuration concentrically positioned within said outer cage, said filtration material including:
a first end;a second end opposing said first end; andoutwardly projecting pleats; an inner core member disposed within said filtration material; and an end cap bonded to each said first and second ends of said cylindrical filtration material, wherein a pleat has a first position on said first end surface and a second position on said second end surface, and wherein said second position is not in alignment with said first position along a longitudinal axis of said filtration material.