초록 ▼

The filter device has a housing with elongated top and bottom walls and side walls which taper inwardly from top to bottom. The top wall has extending downwardly therefrom into the housing a generally flat filter membrane support with a quadrangular periphery, a pair of filter membranes being dispos

The filter device has a housing with elongated top and bottom walls and side walls which taper inwardly from top to bottom. The top wall has extending downwardly therefrom into the housing a generally flat filter membrane support with a quadrangular periphery, a pair of filter membranes being disposed on opposite sides of the support and sealingly bonded to its periphery, the support having a center portion with spaced coplanar surfaces on each side to provide support for the center portion of the filter membranes. The housing is provided with an opening communicating with the space between the two filter membranes and with an opening communicating with the space between the housing and the two membranes. The bottom wall and side walls of the housing are in the form of a unitary molding of organic polymeric material open at its upper end, and the top wall and the downwardly extending filter membrane support is formed of another molding of organic polymeric material bonded about the periphery of the top wall into the open end of the outer molding. Because of such structure the device can be manufactured at relatively low cost and is compact while yet affording a large filtering area.

대표청구항 ▼

The filter device comprising a housing with elongated top and bottom walls and side walls which taper inwardly from top to bottom, said top wall having extending downwardly therefrom into the housing a generally flat filter membrane support with a quadrangular periphery, a pair of filter membranes b

The filter device comprising a housing with elongated top and bottom walls and side walls which taper inwardly from top to bottom, said top wall having extending downwardly therefrom into the housing a generally flat filter membrane support with a quadrangular periphery, a pair of filter membranes being disposed on opposite sides of the support and sealingly bonded to its periphery, the support having a center portion with spaced coplanar surfaces on each of the two sides thereof adjacent the filter membranes to provide support for the center portions of the filter membranes, said top wall having an opening which extends through the periphery of the support and communicates with the space between the two filter membranes, and said top wall having at least one opening adjacent a side wall of the housing communicating with the space between the housing and the two membranes, the bottom wall and side walls of the housing being in the form of a unitary molding of organic polymeric material open at its upper end, and the top wall and the downwardly extending filter membrane support being formed of another molding of organic polymeric material bonded about the periphery of the top wall into the open end of the other molding.