| 摘要 |
PURPOSE:To provide a printer device capable of comparatively easily switching the density to the one desired by an operator. CONSTITUTION:This device is provided with a toner mark output means 1 outputting the toner mark information for printing together with the output of the printing information in the same or different timing, a density detecting sensor 2 detecting the density of a toner mark outputted in printing based on the toner mark information, and a toner supply amount control part 3 actuated based on the output from the sensor 2 and controlling to set the toner supply amount to an optimum amount. The output means 1 is provided with plural toner mark output parts 1A, 1B and 1C individually generating and outputting plural pieces of toner mark information having different reflectance, and an output part selection switch 4 selectively setting the plural output parts 1A to 1C according to a command from the outside. |
