Patent ID: 8275272
Filing Date: 2012-09-25
Classification: G03G

Abstract:
1. A method for replacing a customer replaceable unit (CRU) in a printing system, comprising: determining a historic usage pattern for a photoreceptor during a usage of the photoreceptor, the historic usage pattern for the photoreceptor being determined as an amount of use of the photoreceptor per a unit of time, a usage attribute is an imaging layer thickness of the photoreceptor; periodically measuring the imaging layer thickness of the photoreceptor according to saturation charging; plotting the imaging layer thickness of the photoreceptor as a function of time between periodic measurements to obtain a resultant plot; calculating a remaining time for the photoreceptor based on a relationship between the imaging layer thickness and time from the resultant plot; and signaling a user for ordering a new photoreceptor when the remaining time for the photoreceptor is substantially equivalent to a pre-determined value.