APPARATUS FOR AND METHODS OF MIXING AND DISPENSING LIQUID OR POWDERY SAMPLES

摘要

Apparatus and methods of mixing and dispensing small samples are described. Samples may be mixed in a small vessel (12) which is* provided with an impeller (20) located at or adjacent its base (14) and driven by a shaft (22) extending through the base. Mounted for rotation within the vessel, either with the impeller or independently thereof, is an agitator means such as a helical spring (28) which is compressible towards the impeller under applied load. Samples may be dispensed from the vessel using a piston member (40) having a through passage (44). The piston member is insertable into the vessel to force the sample therefrom through the passage.