Patent ID: 7901066

Claim:
An ink jet recording apparatus, operative to perform recording on a recording medium and to transport the recording medium in a first direction, comprising: a recording head, having a dot formation element array in which a plurality of dot formation elements each of which is operative to eject liquid therefrom are arrayed, and movable in a second direction perpendicular to the first direction; a platen, having a plurality of supporting surfaces configured to support the recording medium which is transported in the first direction at a position opposed to the recording head, the surfaces separated from each other: a controller, operative to control a transporting operation of the recording medium in the first direction, a moving operation of the recording head in the second direction, and a liquid ejecting operation of the recording head based on recording data, the controller performs, in the recording on a recording medium which has a predetermined size: a first mode, causing the recording head to accelerate from a first position, and stop at a third position, and to eject liquid toward the recording medium while moving from the first position to the third position such that a margin is formed on an end portion of the recording medium in the second direction; and a second mode, causing the recording head to accelerate from a second position outward from the first position relative to the recording medium in the second direction and stop at a fourth position outward from the third position relative to the recording medium in the second direction, and to eject liquid toward the outside of the end portion of the recording medium while moving from the second position to the fourth position such that the margin is not formed on the end portion of the recording medium in the second direction; and a plurality of ribs, disposed at a position between adjacent support surfaces of the platen to receive liquid ejected from the recording head toward the outside of the end portion of the recording medium, the ribs arrayed in the first direction, each extending in the second direction, and each protruding toward the recording head, wherein top surfaces of the ribs are situated below the supporting surfaces of the platen.