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US 8,567,777 B2Granted
Combined ultrasonic-based multifeed detection method and sound-based damage detection method
AssigneeEastman Kodak Company
InventorsAnthony A. Syracuse, Randall R. Maysick, Thomas Gregory Middleton, Daniel P. Phinney, Swapnil Sakharshete, David M. Schaertel
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Abstract
A method for feeding sheets through a sheet transport path. Ultrasonic energy is directed toward a sheet in the transport path while an audio receiver detects audio data generated by the ultrasonic source and the mechanisms that transport the sheet. The audio data is processed to determine whether a multifeed or a misfeed condition exists in the transport path.
Claims16
A method for feeding sheets comprising:
- urging a sheet through a sheet transport path;
- directing ultrasonic energy toward the sheet and toward only one audio receiver;
- processing audio data detected by the audio receiver, the audio data detected during the step of urging, by filtering the audio data into a first frequency band and a second frequency band, wherein the first frequency band corresponds to a multifeed and the second frequency band corresponds to the misfeed;
- determining a misfeed in the audio data;
- and
- terminating feeding sheets in response to the step of determining.
3 more elements
A method of determining a misfeed in an article processing apparatus, comprising:
- placing only one microphone in the article processing apparatus;
- placing an ultrasonic energy source in the article processing apparatus;
- feeding an article into the article processing apparatus;
- generating and collecting data frames of sound detected by the microphone;
- processing the collected data frames to determine the misfeed;
- and
- reducing a probability of a false misfeed determination including:
- accumulating a number of data frames collected;
- and
- reducing a sensitivity setting if the number of data frames collected exceeds a preselected amount.
7 more elements
Dependencies are inferred from the claim text.