Device for removing foreign material from processing tank

A processing tank assembly for pooling and enabling fluidization and agitation of a processing liquid into which a work is to be immersed, the processing tank assembly comprising:

• a processing tank having a grooved part, said grooved part having a plurality of concave and convex shapes formed along a work-conveying direction on a bottom surface of the processing tank;
• a processing liquid supply pipe configured to circulate and supply the processing liquid to the processing tank, said processing liquid supply pipe being disposed within said processing tank adjacent said grooved part;
• a plurality of branch pipes that extend transverse to the work-conveying direction and are abuttingly supported by convexities of the grooved part, each of said branch pipes branching off the processing liquid supply pipe;
• and
• processing liquid discharge nozzles, said nozzles being provided on the branch pipes and being directed generally opposite to the work-conveying direction, said nozzles being disposed generally at a center of concavities of the grooved part and intermediate adjacent convexities.