초록 ▼

In a xerographic printing apparatus wherein a development field is maintained between the photoreceptor and a donor member, there is always a danger of arcing across the field, particularly at high elevations. An arcing-avoidance system interacts with the print quality control system of a printing a

In a xerographic printing apparatus wherein a development field is maintained between the photoreceptor and a donor member, there is always a danger of arcing across the field, particularly at high elevations. An arcing-avoidance system interacts with the print quality control system of a printing apparatus, to monitor the biases within the apparatus being demanded at various times by the control system. If a bias consistent with arcing conditions is approached, the arcing-avoidance system constrains the control system to avoid the arcing conditions. The arcing-avoidance system accepts as an input the elevation of a particular printing apparatus.

대표청구항 ▼

[ What is claimed is:] [1.]1. An electrostatographic printing apparatus having a development system, the development system comprising:a donor member;a charge receptor, a development gap being defined between the donor member and the charge receptor;means for creating a development field in the deve

[ What is claimed is:] [1.]1. An electrostatographic printing apparatus having a development system, the development system comprising:a donor member;a charge receptor, a development gap being defined between the donor member and the charge receptor;means for creating a development field in the development gap, whereby toner is conveyed from the donor member over the development gap to the charge receptor by the development field;means for monitoring at least a first parameter of the system to detect an arcing condition within the development gap;means for creating at least one of a DC bias and an AC bias in the development field;means for creating an initial charging voltage on the charge receptor; andmeans for altering a second parameter of the system to avoid the arcing condition if an arcing condition is detected, wherein the second parameter is the initial charging voltage on the charge receptor.