| 摘要 |
PURPOSE:To prevent the wasteful consumption of toner which is not supplied for copying directly by forming a reference picture at the time of copying by a special copying magnification with a high copying frequency, executing the constant quantity supply of the toner in accordance with the copying quan tity at the time of the copying except for it. CONSTITUTION:When the density of the reference picture is lower than the reference density at the time of the magnification copying, the toner of the quantity is supplied in which the toner quantity necessary to develop the original with the black and white ratio of 20% an A4 size is applied to the toner quantity necessary to develop the reference latent image. When the density of the reference picture is higher than the reference density, the toner of the quantity is supplied in which the toner quantity necessary to develop the original with the black and white ratio of 2% by the A4 size is applied to the toner quantity necessary to develop the reference latent image. On the other hand, at the time of the variable power copying, the control by an AIDC is not required, and the toner of the quantity necessary to develop the original of the black and white ratio of 2% by the A4 size for one copying is supplied in the constant quantity. |
