Patent ID: 8877020

Claim:
An electrolytic regeneration unit for use in an electrolytic regeneration apparatus for electrolyzing and regenerating a treatment liquid used for desmearing in a desmearing tank, the electrolytic regeneration unit comprising: an anode pipe having an inner circumferential surface functioning as an anode; and a cathode disposed inside the anode pipe at a distance from the inner circumferential surface of the anode pipe, wherein the anode pipe includes: a main pipe portion that has a first connection end portion for connecting one pipe and a second connection end portion for connecting another pipe other than the one pipe, and forms a flow channel for the treatment liquid that continues from the first connection end portion to the second connection end portion; and a secondary pipe portion that has a cathode attachment end portion for attaching the cathode, extends in a tubular fashion from an intermediate section of the main pipe portion, the interior of the secondary pipe portion communicates with the flow channel inside the main pipe portion, and the cathode extends inside the secondary pipe portion from the cathode attachment end portion toward the main pipe portion.