| 摘要 |
An arrangement for controlling the surface speed of one endless xerographic plate relative to another in a duplex xerographic machine. According to the arrangement, an endless member along a first portion thereof is operatively associated with one of the xerographic plates to be driven at a surface speed proportional to the respectively associated xerographic plate and along a second portion thereof is operatively associated with the other of the xerographic plates to be driven at a surface speed proportional to the other of the respectively associated xerographic plates. The endless member along a third portion thereof is formed into a loop, the size of which may vary according to variations in the relative surface speeds between the xerographic plates. Upon detection in variations in the size of the loop portions of the endless member, the surface speed of the respective xerographic plates may be operatively varied to maintain equal surface speeds between each of the xerographic plates.
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