Fitzpatrick, Cella, Harper & Scinto
Recording medium determination apparatus and image forming apparatus
The recording medium determination apparatus includes a transmission unit for transmitting an ultrasonic wave, a receiving unit for outputting a signal corresponding to the ultrasonic wave, a peak extraction unit for detecting a value of the signal output from the receiving unit, a control unit for determining basis weight of a recording medium based on the value of the signal, and a timer for measuring a period of time from when the transmission unit transmits the ultrasonic wave to the detection by the peak extraction unit. The control unit calculates, based on a period of time measured by the timer at the time of factory shipment and a period of time measured by the timer after the factory shipment, variation of a distance between the transmission unit and the receiving unit after the factory shipment.
CANON KABUSHIKI KAISHA
G G G
G03G G03G G03G
additional inventional additional
Tsutomu Shuhei
Ishida Watanabe