Filter leaf assembly with bonded spacer and sealer

In a filter leaf assembly, a filter leaf comprising a rigid generally rectangular peripheral frame including horizontally extending upper and lower frame members fixedly secured at opposite ends to vertically extending end frame members, means defining a flat bottomed recess extending around the entire inner periphery of said frame at each of the opposed sides of said frame, a pair of like generally rectangular perforate filter support panels fixedly mounted within said frame and extending between the inner sides of said frame members in spaced parallel relationship to each other, each of said panels having a plurality of spaced parallel longitudinally and transversely extending webs defining an open grid-like structure, and a plurality of elongate spacing members bonded to and between opposed webs in said panels to establish and maintain the panels in spaced parallel relationship to each other, a pair of filter media panels, one media panel overlying the outer sides of each of said support panels and projecting beyond the edges of said support panels into said recess, peripheral media frame means for securing continuously around the peripheral edges of each of said filter media panels, and attachment means fixedly securing the peripheral media frame means of said media panels to said frame members in said recess and continuously sealing said media panels to said frame members around the entire periphery of each support panel.

A filter leaf assembly comprising:

• a pair of like generally rectangular filter media support panels, each of said panels comprising a plurality of space parallel longitudinally and transversely extending webs defining an open grid-like structure, and a plurality of elongate spacing members bonded to and between opposed webs on said panels to establish and maintain said panels in spaced parallel relationship to each other, said panels having a plurality of openings extending therethrough for conducting fluid flow into the space between said panels;
• a rigid generally rectangular peripheral frame defined by spaced parallel longitudinal and transversing frame members fixedly secured to each other to extend continuously around the peripheries of said support panels and fixedly secured thereto to support said panels in spaced parallel relationship to each other and to enclose said space between said panels, one frame member of said peripheral frame having an elongate opening therethrough defining a fluid outlet from said space and a pair of grooves located respectively on opposite sides of said one frame member;
• a pair of filter media sheets, one sheet overlying an outer side surface of each of said support panels, wherein each of said media sheets comprises a rectangular sheet of filter media fixably mounted within a rectangular peripheral media frame adapted to be sealingly secured to said peripheral frame members, wherein the borders of said media sheets are perforated so that a bonding agent can pass through these perforations to secure said media sheets to said media frame;
• an elongate rigid outlet pipe in fluid communication with said elongate opening through said one frame member, a slot through the wall of said pipe extending axially from one end of said pipe, said slot having a width less than the thickness of said one frame member, said pair of grooves located respectively in opposite sides of said one frame member to slidingly engage and receive the wall of said pipe at opposite sides of said slot to thereby locate and position said one frame member on said pipe;
• means for sealing said pipe to said one frame member;
• and
• means for sealingly closing said end of said pipe after said one frame member is located within said slot.