Simultaneous transfer of several liq. doses - is effected by syringes with pistons attached to motor driven plate

摘要

An assembly of several vertical syringes is used to provide simultaneous transfer of several liquid doses. This permits easing of transition between laboratory and production scale for microtests on microbes. A housing (1) contains several syringes (2) arranged in lines and columns with their needles (4) directed downwards. Piston shafts (5) pass through the wall (3) and are attached at the upper end (6) to a moving plate (7). A screw (17) operates with a threaded vertical shaft (18) driven by an electric motor to raise or lower the pistons. A carriage (20) under the syringes moves vertically under control from the jack (21) to allow the needles to enter tubes containing proportioning liquids.