Method and device for withdrawing analytical consumables from a storage container

摘要

Magnitude of plunger (7) thrust during extraction is a function of its position. An Independent claim is included for the corresponding method of removing a medical sample from a container. Thrust is a function of plunger retraction path, measured relative to a fixed part. Thrust increases on: penetrating sheet over the extraction opening, positioning the test strip in a position for application or on extracting a used strip. Speed is changed as an inverse function of velocity. Plunger motion may be under mechanical control, a cam or lead screw drive being feasible. The control device longitudinal axis extends in the direction of plunger motion. The plunger penetrates it axially. The screw pitch is constant or variable. Drive speed is constant. A follower and grooved-cylinder motion control may be used. Analysis apparatus employing the principle is also claimed.