International Business Machines Corporation

James E Bierschbach

Jerry J Abbott

Raymond A Daniels

Ben A Nilsson

Robert L Fey

Roberta R Tanner

Greg S Herring

Keith N Bobo

Selected points in a copier are monitored by signal lines connected to a computer. If a signal is detected on a signal line, the time of occurrence is stored in the computer's memory at a location associated with the point that caused the signal. Eventually an array of the times of operation of each monitored point will be stored. The computer then calculates the difference between the times stored for selected pairs of the monitored points and stores these, as intervals, in additional locations of the memory. The intervals are combined to give calculated statistical results (mean, deviation, etc.) each of which is then compared against predetermined values normal for correctly operating copiers also stored in the memory. The results of the comparison set error flags if the limits are exceeded indicating possible future copier failures.

Apparatus and method for predicting failure in a copier's paper path

Apparatus and method for accurately setting a gap between mating

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Longmont, CO, United States of America

James E Bierschbach