Patent ID: 9308584
Filing Date: 2016-04-12
CPC Classification: B01D,B22F

Claim Text:
1. A method of making a sintered fiber filter element, the method comprising: (a) providing a mold having a cylindrical cavity with an end closure at one end of the cylindrical cavity, and a fill cap at another end of the cylindrical cavity, wherein the fill cap is removable to provide an open end, and a core rod movably sealed in said end closure and extending coaxially within said cavity; (b) orienting said mold vertically with said open end disposed upwardly; (c) introducing fiber and liquid into said cavity through said open end substantially radially evenly about said core rod; (d) creating a pressure differential in the mold to expel liquid from the mold; (e) applying pressure to said mold and thereby to said fiber in said cavity, whereby said fiber coheres to form a substantially tube-shaped structure; (f) removing said substantially tube-shaped structure from said mold; (g) sintering said substantially tube-shaped structure to obtain a porous tube-shaped sintered filter element having a first end and a second end; and (h) densifying the ends of said porous tube-shaped sintered filter element.