FILTER LEAF CONSTRUCTION AND METHOD OF MAKING SAME

摘要

A filter leaf for use in a pressure filter tank includes a pair of cake-supporting perforate sheets respectively overlying the opposite faces of a perforate core, a circumferential channel-shaped rim surrounding the sheets and the core, and a pair of flexible gaskets respectively disposed between the rim and the sheets to seal them to the rim. In one embodiment, a single gasket overlies the periphery of each perforate sheet and includes a rounded end portion extending radially inwardly beyond the rim on the exterior of the perforate sheet, whereby the pressure in the tank exerted on the rounded end portion causes it to deform and thus provide an even tighter seal between the sheet and the rim.