Regulierung der Tonerzufuhrgeschwindigkeit

摘要

The Infra-Red Densitometer (IRD) (54) readings of developed toner patches in a tri-level imaging apparatus (2) are compared to target values stored in Non-Volitale Memory (NVM) (156) and are also compared to the previous IRD (54) reading. Toner dispensing decisions (i.e. addition or reduction) by a control board (150) are based on both comparisons. In this manner, not only are IRD readings examined as to how far the reading is from the target, they are examined as to current trend (i.e. whether the reading is moving away from or toward the target).