Abstract:
A damage amount determination device, which is used for an image forming device that forms an image on paper, includes an information acquisition unit that acquires information related to whiteness of the paper used for printing and a damage amount determination unit that determines an amount of damage, which is caused by the paper to a predetermined component of the image forming device when the paper passes through the predetermined component, based on the information related to the whiteness.
Abstract:
An image forming device includes: a developing device which includes a developing unit storing a developer containing a first carrier and a toner and a toner concentration detection unit detecting a toner concentration within the developing unit; and a supply container which stores a supply developer containing a second carrier and the toner, and supplies, based on a detection value by the toner concentration detection unit, the supply developer to the developing unit and discharges an excessive amount of the developer within the developing unit from the developing unit. Then, the setting value of the toner concentration detection unit is corrected based on the presence proportion of the second carrier within the developing unit detected by a calculation unit.
Abstract:
A developing apparatus that develops an electrostatic latent image on an image supporting body, using developer including toner and carrier, includes: a circulation path where the developer circulates; a discharge path which is connected to the circulation path and through which some of the developer passes; and a first recycle path connected to the discharge path and allowing some of the developer flowing into the discharge path to return to the circulation path, wherein the discharge path is provided with: a discharge opening for discharging the developer flowing into the discharge path; and a first return opening for connecting to the first recycle path, and the first return opening is located on an upper side in a vertical direction with respect to the discharge opening and located on an upstream side in a pass-through direction of the developer flowing into the discharge path.