Elmex Limited

Masamichi Tawara

Shin-ichi Waku

Kazuo Shiraiwa

Yuichi Nishimura

Disclosed is a membrane filter system comprising an integral plastic holder ( ) having a filter receiving section ( ) for receiving a membrane filter ( ) that collects target microorganism contained in sample solution, a funnel mount ( ) positioned at a level higher than the filter receiving section for carrying thereon a cup-shaped paper funnel ( ) adapted to receive the sample solution, and a drainage ( ) communicated with the filter receiving section. The funnel has a bottom sheet or a paper filter ( ) and a bottom peripheral flange ( ) surrounding the bottom sheet. Resin seal means ( ) is fitted to the funnel mount to provide liquid-tight engagement between the funnel and the holder. The bottom sheet of the funnel is positioned above the membrane filter and serves as a primary filter for collecting particles in the sample solution larger than the target microorganism before the sample solution reaches the membrane filter.

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Hiroshima, Japan

Masamichi Tawara