Apparatus for cleaning transfer plate and method for cleaning the same

An apparatus for cleaning a transfer plate, comprising

• a rack;
• a cleaning tank mounted on the rack and configured to hold a cleaning liquid therein;
• a cleaning roller pivotally mounted to the rack, at least a part of a cylindrical surface of the cleaning roller being located inside the cleaning tank, wherein a transfer plate fixing mechanism is provided on the cylindrical surface of the cleaning roller for fixing a transfer plate wound around the cylindrical surface, protrusions which correspond to recesses in the transfer plate one to one are provided on the cylindrical surface of the cleaning roller, and a vacuum suction hole for sucking the transfer plate is provided on the periphery of a protrusion, and wherein the protrusion is configured to raise up a bottom surface of the recess in a direction toward an opening of the recess at a side of the transfer plate facing away from the recess when the vacuum suction hole sucks the transfer plate;
• a friction cleaning device mounted inside the cleaning tank, the friction cleaning device being configured to contact with the transfer plate wound around the cleaning roller and to frictionally clean the transfer plate through a relative movement between the cleaning roller and the friction cleaning device;
• and
• a drive device driving the cleaning roller and/or the friction cleaning device so as to generate the relative movement between the cleaning roller and the friction cleaning device.