Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In a xerographic device for copying documents by optical imaging between a document, which is transported by some mechanical means and a photoreceptor drum driven by a separate mechanical means, it is common to drive the original by a servo motor which is phase locked to an encoder signal generated on the drum shaft. If error signals from the encoder cannot be tracked by the document drive system, llskipsll or other distortions in the reproduction will occur.