Browse Prior Art Database

Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal


The above diagram illustrates the following concept: Some photoreceptors used in xerographic copying machines have short useful lives. To reduce service costs and the number of service calls, photoreceptor replenishment systems may be built into the machines to replace a used photoreceptor with a new one. In addition to normal wear, a scratch may dictate replacement of a photoreceptor if defective copies are being produced. Although an indexing switch could be provided to allow a customer to replace a scratched photoreceptor with a new one, this would increase the risk that the customer would wastefully replace photoreceptors. To prevent this waste while simultaneously eliminating most service calls for a scratched photoreceptor, it is proposed that the machine be coupled through a modem to a remote computer which interro-gates and interprets machine symptom signals. The nature of a scratch would determine whether a service call is necessary or whether the damaged photoreceptor may be replaced with a new one by the remote computer. For example, a circumferential scratch that extends in the direction of photoreceptor travel could be caused by machine interferences and replacing the damaged photoreceptor with a new one by the remote computer may result in a similar scratch on the new one. Latitudinal scratches at an angle to photorecptor travel, however, are more likely to be caused by random occurrences, and conse-quently the damaged photoreceptor could be replaced with a new one by the remote computer.