Filter element and method of making the same

Abstract

One or more strips or sheets of wire cloth, or one or more perforate metallic sheets, are wound into the form of a multilayered hollow filter body. In the event that plural strips or sheets of wire cloth, or plural perforate metallic sheets, are used to form the hollow filter body, the various strips or sheets of wire cloth, or the various metallic sheets, may be of different mesh so as to obtain variations in the filtering effect. The thus-formed hollow filter body is subjected to a sintering operation so as to cause adherence of the windings of the hollow filter body to one another and thereby obtain a coherent filter body. The latter may be used as a filter element as is or may be subdivided so as to form several filter elements therefrom. It is further possible to sever the wall of the filter body along a direction paralleling the longitudinal axis of the filter body and to then straighten the severed filter body so as to obtain a multilayered filter plate. Where necessary or desirable, it is possible to provide a reinforcing element for the filter body and this reinforcing element may be arranged exteriorly of the filter body, interiorly of the filter body or in the wall of the latter. The reinforcing element may be in the form of a wire coth or a perforate metallic plate having a coarse mesh size.

Dependencies are inferred from the claim text.