METHODS AND EQUIPMENT FOR MAKING FILTER ELEMENTS

Abstract

Described is a method for making a filter element (200) comprising the steps of: advancing two or more sheets of filter material (102) in a longitudinal direction; separating the two or more sheets of longitudinally advanced filter material (102); collecting the separated sheets of longitudinally advanced filter material to form a partially collected bar of filter material having a longitudinally elongated recess; inserting an additive discharge vessel (204) into the longitudinally elongated recess; collecting the filter material around the additive discharge vessel to close the recess and thereby forming a bar comprising a core of longitudinally elongated filter material and one or more additive discharge vessels (204).

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