Paper size width detection is performed by a bypass feed size detection switch (rotary switch).
The bypass feed size detection switch has a rotation plate which rotates together with the side fence of the bypass feed table, and detects the paper size.
Paper portrait/landscape is determined by a length detection sensor.
Two feelers [A] for the bypass paper length sensor [B] are added to the rear of the tray to prevent a false detection in paper length detection caused by floating on the rear of paper when large size paper is set without pulling out the extension bypass tray.