Eastman-kodak Company

Ronald W Stephens

Timothy John Young

David J Fuest

Donald J Lewandoski

Eric G Sheldon

George R Vorhauer

A method of improving the synchronization of the timing of a plurality of physically coupled print engines by detecting and eliminating misleading indications of a non-synchronized print engine that are essentially minimal variations caused by disturbances to the printer such as torque disturbances, power line voltage or frequency variations, etc. using a chosen number of consecutive changes in the time delay to result in the time delay of the receiver being handed off from one engine or module to a sequential engine or module before a machine error is declared. This method notes that a speed variation is sufficiently large or if a signal is reported that a module, operating within its speed specifications but near the end the limit of that specification, had been subjected to a small incremental change in module speed resulting in that module operating outside its specifications and takes corrective actions or not depending on the magnitude and or source of the variation.

Maximizing speed tolerance during dual engine synchronization

A method of synchronizing the timing of a plurality of physically coupled print engines using a small delta time increment. According to the first mode of practice, the second electrophotographic module, designated as Eis started at a slower operating speed than its normal run speed. The PI control algorithm that controls the motor speed will then allow the speed of Eto reach its nominal speed.

Engine synchronization with a small delta time between engines

A copier apparatus and method for copying is described that includes a scanning station for scanning a set of document sheets to be copied as a production job. The scanning station includes a platen for supporting a document sheet to be scanned in a first mode wherein the document sheet is manually positioned on the platen by an operator. An automatic document handler or feeder is provided for automatically feeding seriatim document sheets to the scanning station for scanning document sheets in a second mode; i.e., an automatic feeding mode. An operator control panel includes a display for indicating options for selection by an operator in response to clearance of a jam condition in the feeder. The display includes an option for selecting the first mode; i.e. platen mode, for scanning of the document sheet that was jammed. There is thus provided a facile recovery from a jammed condition allowing copying from the platen of documents that may no longer be suited for feeding through the feeder as part of a pause or interrupt operation in a production job.

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Lima, NY, United States of America

Ronald W Stephens