Browse Prior Art Database

Original Publication Date: 1986-Feb-28
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


The performance of a drive system in a xerographic machme IS rated on its ability to provide uniform motion quality to sensitive drive components, particularly the photoreceptor belt or drum. Torque spikes, such as paper feeding into a roll fuser nip, or a cleaner blade coming into contact with a belt seam, must be isolated from the belt drive so that copy quality parameters of resolution, skips and smears can be met. Elements that induce such spikes rnust be placed on a different drive loop from the photoreceptor so that the inertia of the motor rotor can be used to absorb these spikes before they reach the belt. One method to obtain the required isolation is to use a motor with double output shafts. The figure shows a motor having a first shaft 12 driving the photoreceptor and a second shaft 10 driving the remainder of the drive components. Not only are the torque-inducing elements seperated from the photoreceptor drive by the motor, but the photoreceptor belt drive is directly linked to the motor, providing sufficient stiffness to ensure a uniform belt motion.