PURPOSE: To provide a trace of detergent feeding device which is constituted to stably feed a trace of detergent and beside be stably used for a long time 'and eliminate special maintenance, such as exchange of parts, during the use.
CONSTITUTION: A trace of liquid feeding device comprises a check valve 182 disposed in a suction passage for a detergent; a check valve 183 disposed in a delivery passage for a detergent in the same direction as that of the check valve 182; a space 184 formed between the check valves 182 and 183; and a drive shaft 185 movable forward in and backward from the space 184. A member with which the detergent makes contact is formed of chemical resistant synthetic resin and feeds the detergent in an amount equivalent to a distance by which the drive shaft 185 enters the space 184.
SAITO SHIGERU
KAO CORP