Provided is an offset printer configured to increase or maximize productivity and yield. The finger units include a Scott Russell mechanism, a first parallel link mechanism, and a second parallel link mechanism. The optical coupling configuration includes an optics system that provides the plug with optical communications capabilities. A coil is disposed on the distal side of the first wire. The heating pipe is mounted on a fixing groove formed in a mounting portion provided on the front edge of the inner case. In particular, the load transporting apparatus may include a track configured to a saddle housing, and a foot that may be connected to the track.