System and method for sensing a paper roll ultrasonically

Details System and method for sensing a paper roll ultrasonically System and method for sensing a paper roll ultrasonically

2006-09-21

2008-12-16

Williams, Hezron E. (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S597000, C073S602000

Reexamination Certificate

active

07464594

ABSTRACT:
A method for sensing paper on a paper roll is disclosed. The method comprises transmitting an ultrasonic signal into the paper roll and detecting an ultrasonic return echo transmit signal from the paper roll, the ultrasonic return echo transmit signal resulting from the ultrasonic signal interacting with the paper roll. Moreover, the method comprises determining an amount of paper remaining on the paper roll in response to the ultrasonic return echo transmit signal. Furthermore, the method may comprise indicating that the paper roll needs to be replaced in response to determining the amount of paper remaining on the paper roll.

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