초록 ▼

A filter includes a cylindrical filter element having a longitudinal axis, first and second end surfaces, and a plurality of longitudinal pleats. Each of the pleats has a pair of legs with first and second surfaces. The pleats are in a laid-over state in which the first surface of each leg is in int

A filter includes a cylindrical filter element having a longitudinal axis, first and second end surfaces, and a plurality of longitudinal pleats. Each of the pleats has a pair of legs with first and second surfaces. The pleats are in a laid-over state in which the first surface of each leg is in intimate contact with the first surface of an adjoining leg and the second surface of each leg is in intimate contact with the second surface of an adjoining leg over substantially the entire height of each leg and over a continuous region extending for at least approximately 50% of the axial length of the filter element. An impervious end cap is connected to the first end surface of the filter element.

대표청구항 ▼

[ What is claimed is:] [1.] A filtering method comprising:passing a fluid in one direction radially through a pleated filter element having laid-over pleats in which a first surface of a first leg of one pleat is in intimate contact with the first surface of an adjoining leg of said one pleat and a

[ What is claimed is:] [1.] A filtering method comprising:passing a fluid in one direction radially through a pleated filter element having laid-over pleats in which a first surface of a first leg of one pleat is in intimate contact with the first surface of an adjoining leg of said one pleat and a second surface of said first leg is in intimate contact with the second surface of an adjoining leg of an adjacent pleat over a substantial portion of the height of the first leg and over a continuous region extending for at least approximately 50% of the axial length of the filter element andpassing a cleaning fluid in the opposite direction radially through the laid-over pleats of the filter elements.