Abstract: An improved apparatus for mixing fluids in sealed containers, such as blood samples in test tubes or the like, is disclosed which includes a support structure on which a motor-driven rotatable mixing disc is mounted. The disc is provided with integral recesses in the shape of the sealed containers to be agitated and is disposed at an angle such that the containers are retained in the recesses by gravity. In the preferred embodiment, the recesses are radially disposed on the disc and are so designed as to receive interchangeably a plurality of lengths of test tubes.

Abstract: An integral, automated hematology slide preparation station is disclosed which includes assemblies for sample mixing, automated smearing and staining in a single unit. A rotary mixing sub-assembly is provided which interchangeably mixes vials of several sizes and requires no clips or auxiliary holding devices for the vials to be mixed. The pushbutton operated smearing or wedging sub-assembly includes a pivotally mounted, self-leveling counterbalanced reciprocating smearing arm which cams the wedging member and which, with a precise drive control produces highly repeatable blood smears containing substantially a monolayer of blood cells. The smearing sub-assembly operates in conjunction with a manually operated slide dispenser and automatic smear dryer. The staining sub-assembly is completely automatic and includes a conveyer system consisting of three synchronized, intermittently driven, conveyer sections.