Patent ID: 8758611
Filing Date: 2014-06-24
Classification: B01D,Y10T

Abstract:
1. An edge member for membrane elements that is disposed at an end in an axial line direction of a membrane roll body formed by winding a membrane member around and serves to prevent the membrane member from being shifted along the axial line direction, comprising: a main body that faces an end surface of the membrane roll body; and an extension that extends from the main body toward the membrane roll body along the axial line direction, wherein a plurality of types of undulations having different shapes from each other are formed on an outer circumference of the extension, wherein the plurality of types of undulations include a first undulation and a second undulation, and wherein the second undulation is formed on the first undulation, and an exterior finishing material is attached to extend across the outer circumference of the extension and an outer circumference of the membrane roll body.