Abstract: A device for removing and re-applying a cover to an open container of a liquid aspirated in an analyzer, the device including a plurality of receptacles disposed in an array for holding a plurality of containers of a liquid, a cover for each of the receptacles of a size and shape sufficient to sealingly cover a container in each receptacle, a mechanism for permanently attaching the cover to the receptacle, the mechanism including a retainer of each of the covers that is pivotally mounted on the receptacle and a bi-stable pivot in the device for pivoting and holding the retainer and thus its cover in either a first position in which the cover contacts and closes a container, or a second position in which the cover is held raised away from contact with any container in the receptacle by means of a leaf spring pressed against a cam.

Abstract: An analyzer having a chute for directing disposable tips to a waste bin in the analyzer. The chute is located at the intersection point created by the path of the aspirating mechanism and the path of the tray of containers used by the aspirating mechanism. The chute is movably mounted so as to be movable out of the way when a tray is presented at the intersection path.