Ultrasonic softness testing system

Details Ultrasonic softness testing system Ultrasonic softness testing system

1984-07-20

1985-10-22

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73 78, 73159, 73599, 73627, 162198, 162263, G01N 2900

Patent

active

045480818

ABSTRACT:
The softness of paper as a function of the number of bonding sites per unit area of the paper is determined by directing ultrasonic energy toward the paper and determining the magnitude of the portion of reflected energy.

REFERENCES:
patent: 2786352 (1957-03-01), Sobota
patent: 2922303 (1960-01-01), Veneklosen et al.
patent: 3151483 (1964-10-01), Plummer
patent: 3683681 (1972-08-01), Taylor

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