Liquid purification or separation – With repair or assembling means
Patent
1992-08-28
1993-08-31
Dawson, Robert A.
Liquid purification or separation
With repair or assembling means
210241, 210252, 210359, 210398, 210407, 422101, B01D 3300
Patent
active
052406067
ABSTRACT:
An apparatus and method provide automated collection and transfer of particles from a liquid suspension to a glass slide for visual examination. A solution which contains particles, for example cells, is drawn through a filter element so that particles too large to pass through the filter element collect against a first surface of the filter element. A transfer fluid, such as alcohol, is applied from a second surface of the filter element to the first surface, to transfer cells from the filter element to a glass slide positioned adjacent the filter element. An alternative transfer mechanism applies a selected pneumatic signal to the filter element for transferring collected cells to the viewing slide. The apparatus includes a device for dispersing the liquid suspension of particles prior to the collection process and particles collect against the filter element with a spatial distribution advantageous for visual examination. The transfer operation maintains this spatial distribution. The cell-dispersing device and the filter element are on a common structure, for unitary movement, and which is readily disposable and replaceable for each sample of particles.
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Barlas J. Morgan
Farber Fredric L.
Hurley Anne A.
Lapidus Stanley N.
Polk, Jr. Lewis T.
Cytyc Corporation
Dawson Robert A.
Kim Sun Uk
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