Patent ID: 8353591

Claim:
A printer for printing on a surface of a slotted corrugated sheet for forming into a box, comprising: a conveyer belt having apertures extending between a first surface and a second surface thereof; a suction unit for sucking the slotted corrugated sheet to be printed toward the first surface of the conveyor belt; a pair of baffle plates disposed in the suction unit in parallel to a direction of motion of the conveyer belt, the pair of baffle plates being movable in a direction transverse to the direction of motion of the conveyer belt so that a spacing distance between the pair of baffle plates is adjustable; and a plurality of ink jet nozzles disposed transverse to a direction of motion of the conveyer belt, the ink jet nozzles being spaced apart from the surface of the corrugated sheet to be printed; wherein the corrugated sheet has slots extending in a direction transverse to the direction of motion of the conveyer belt at the edges thereof; and, the pair of baffle plates are moved so as to define a printing area on a non-slotted portion of the corrugated sheet therebetween, so that the slots in the corrugated sheet are disposed outside of a suction area formed between the baffle plates.