Monitoring of color developer housing in a tri-level highlight color imaging apparatus

摘要

In a single pass, tri-level imaging apparatus (2), machine cycle down is initiated when the color developer housing (58) is functioning improperly. The voltage level (VDAD) of the color image prior to its development is read using an electrostatic voltmeter (ESV) (ESV₁). The voltage level thereof is also read after development by ESV₂. The difference between these two readings is compared to an arbitrary target value and a machine cycle down is initiated if the difference is greater than the target.