Patent ID: 8192097

Claim:
A printer apparatus comprising: a medium supporter to support an object medium; a guide rail which is provided above the medium supporter to face the medium supporter and which is relatively movable in a predetermined feeding direction with respect to the object medium supported by the medium supporter, the guide rail extending in a scanning direction perpendicular to the predetermined feeding direction; a first device comprising: a first carriage movable in the scanning direction along the guide rail; and a first working device mounted on the first carriage to perform a first predetermined work on the object medium; a second device comprising: a second carriage movable in the scanning direction along the guide rail; and a second working device mounted on the second carriage to perform a second predetermined work on the object medium; a first device holding mechanism capable of holding the first device and provided on one side in the scanning direction with respect to the medium supporter; a second device holding mechanism capable of holding the second device and provided between the medium supporter and the first device holding mechanism in the scanning direction; and a vertically retreat mechanism configured to move the second device holding mechanism and the second device held by the second device holding mechanism along a vertical direction perpendicular to the scanning direction to be located below the medium supporter when the first device holding mechanism releases the first device and the first working device is moved in the scanning direction to perform the first predetermined work.