Patent ID: 7521012

Claim:
A method for making a substantially flat filter plate, said filter plate comprising a substantially flat thermoset polymer frame with substantially flat filter material seated fixedly therein, the method comprising the steps of: (a) forming from a thermoset polymer or precursor thereof an outer first portion of said substantially flat thermoset polymeric frame, said outer first portion having an inner peripherally-displaced ledge of more than sufficient depth and width to hold said substantially flat filter material in substantially coplanar relation within said thermoset polymeric frame; (b) rendering said outer first portion substantially dimensionally stable; (c) seating said substantially flat filter material in said inner peripherally-displaced ledge; and (d) forming an inner second portion of said substantially thermoset polymeric frame by depositing said thermoset polymer or precursor thereof in unfilled areas of said inner peripherally-displaced ledge, thereby substantially completing said frame and fixing said seated filter material in place.