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Abstract

Apparatus for processing samples, such as tissue samples, including a rotatable table which carries either the samples or solutions in which the samples are to be immersed. The table is rotatable between a series of sample processing stations and is also arranged for axial movement between positions at which a sample is and is not respectively immersed in a solution. A single reversible motor is operable to both rotate the table and cause axial movement thereof. The motor drives a spindle having a double helix and also drives the table through a one way clutch arranged so that in one mode of operation the motor rotates both the spindle and the table and in another mode it rotates the spindle only. In the latter case the table is caused to move up and down the spindle as a result of cooperation between a follower and the helix tracks of the spindle.

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First Claim