SYNCHRONOUS V-BELT DRIVE
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
It has become common practice to design copying machines such that one or more of the processing stations may be included in a process unit or cartridge which is removable from the main body of the machine for replacement by a new unit when its life is exhausted or for replacement by a different unit having a different capability. With the advent of such machine architecture, it has become increasingly important to provide a mechanism to drive the functional components in such a process unit. For example, these process units typically contain a photoreceptor either in the form of a cylindrical drum or belt and may also contain a developer unit. The figures illustrate a drive system wherein on the main body of the machine a motor (not shown) provides a drive to a drive pulley 14 in driving engagement with the timing teeth of drive belt 10 endlessly wound around fixed idler rolls 16 and a movable or adjustable idler roll 18. A drive pulley 20 for the photoreceptor is mounted on a process unit which is insertable into the main body of the machine such that the teeth 22 on the pulley are in driving engagement with the valleys 24 between the teeth 10 on the drive belt 12. As illustrated in Figures 2a and 2b, the drive belt has the cross-sectional form of a V and each of the drive pulleys and idler wheels have a matting configuration 26. By using a V-belt in a sheaved groove the belt is positively located and will not walk or track toward one side of the pulley rubbing against an idler flange causing premature wear to the belt and an increase in the torque on the motor due to the belt misalignment. Thus, as the photoreceptor unit is inserted into the main body of the machine, the drive pulley of the photoreceptor mates with the synchronous drive belt of the motor drive pulley.