Patent ID: 7817929

Claim:
A system for adjusting selected operating parameters of an image forming device to improve color registration based on selected environmental conditions, said system comprising: a first image forming station to print a first registration mark on a substrate; a second image forming station having a photoconductive unit, a charging unit and a developer unit cooperable together so as to at least partially erase the first registration mark printed on the substrate by said first image forming station to form a registration pattern in a reverse transfer process of the color registration performed at said second image forming station; a sensor mechanism for measuring selected environmental conditions of dry-bulb temperature and relative humidity; a control mechanism for reading said sensor mechanism to adjust the voltage biases of said charging and developer units of said second image forming station based on a wet-bulb temperature value so as to maintain a predetermined potential difference between charged and uncharged areas of said photoconductive unit of said second image forming station that avoids Paschen breakdown and the development of toner at charged areas of said photoconductive unit during the reverse transfer process of the color registration; and a memory connected to and accessible by said control mechanism and having stored therein lists of correlated values comprising a list of wet-bulb temperature values related to values of dry-bulb temperature and relative humidity measured by said sensor mechanism correlated with lists of voltage values related to voltage biases of said charging and developer units to maintain the predetermined potential difference between the charged and uncharged areas of said photoconductive unit during the reverse transfer process of the color registration.