Patent ID: 8177974

Claim:
Filtration apparatus, comprising: a top plate; a bottom plate spaced from said top plate; a filtration member positioned between said top plate and said bottom plate; a first disposable plastic liner positioned between said top plate and said filtration member, said first liner having a fluid inlet, a fluid outlet, a plurality of fluid inlet apertures, and a pattern of ribs on one side thereof facing said top plate; a second disposable plastic liner positioned between said bottom plate and said filtration member, said second liner having a fluid inlet, a fluid outlet, a plurality of fluid outlet apertures and a pattern of ribs on one side thereof facing said bottom plate; wherein said top and bottom plates are devoid of fluid flow paths and each has a substantially flat surface that mates with said plurality of ribs on a respective liner, said substantially flat surface being grooveless, wherein said respective patterns of ribs on said first and second liners define a grid pattern, each said grid pattern retaining each liner in a flat configuration when mated with the respective top and bottom plates and subjected to pressure.