Dosing head, dosing device comprising a dosing head and method for dosing by means of a dosing head

摘要

Dosing head for a dosing machine or other dosing device comprising: • a carrier, on which a plurality of parallel approaches for receiving pipette tips is arranged side by side, • each approach having the following features: • a tube with an outwardly projecting at least partially encircling support projection at the bottom End, • at least one sleeve with a circumferential taper at the lower end surrounding the tube and axially displaceable on the tube, and • at least one elastomeric O-ring surrounding the tube adjacent to the taper, one above the A sleeve-mounted pressure plate having a plurality of first holes through which the tubes extend, the pressure plate displacing along the tubes from a release position at a first distance from the support projections to a clamping position at a first distance below the second distance from the support projections bar, the pressure plate presses in the clamping position against the upper edge of the adjacent sleeves of all lugs that the sleeves are pressed into the adjacent O-rings and the O-rings are widened to clamp on the lugs stuck tip tips, • a first displacement device , which is connected to the pressure plate and is adapted to displace the pressure plate between the release position and the clamping position.