Sheet determination apparatus using ultrasonic wave transmitting unit or reception unit

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United States of America Patent

PATENT NO 9874842
SERIAL NO

14449833

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Importance

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Abstract

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A protection member is arranged such that the distance from an opening plane of a reception guide to the center of the protection member is half of the distance from the opening plane of the reception guide to the surface of a reception vibration member. In other words, the arrangement position of the protection member is in the center between the opening plane of the reception guide and the surface of the reception vibration member. Accordingly, even if a protection member is arranged, a transmission coefficient is obtained that is equal to a transmission coefficient in the case where no protection member is present.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishida, Tsutomu Suntou-gun, JP 110 1417

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