| 摘要 |
PURPOSE:To eliminate such a useless time that a user should wait until his previous user ends work by discriminating whether a device is usuable through a display means without approaching to the device. CONSTITUTION:An I/O signal processing circuit 34 is installed on the upper end of a supporting body 25 expanding upward of the device main body 1, and electrically connected to the display means 26 so as to operate said means 26 which displays whether the device main body 1 is usuable by lighting a lamp or emitting a sound. A hindrance 27 projects the display mans 26, and a person who wants to have a copy can discriminate the state of the device main body 1 over the hindrance 27 by the visual display of the display means 26 and by signaling display. |
