Storage tank for liquid e.g. fresh water, supplying device, has floater floating on liquid in storage area in freely floating manner and co-operating with storage tank for closing suction hole, when liquid level of liquid is found in area

摘要

The tank has a storage area (6) into which liquid (3) is flowed through a liquid inflow opening (8). A suction hole (10) produces a low pressure in the storage area. A floater (18) floats on the liquid in the storage area in a freely floating manner and co-operates with the storage tank for closing the hole, when a liquid level of the liquid is found in the storage area on or over a preset upper closing level (20). Lower and upper sensors (48, 52) contain a dry reed contact and the floater contains a permanent magnetic material (56), which operates the contact. An independent claim is also included for a fluid supply device for a printing machine cleaning device including a storage tank.