Ultrasonic measuring sensor for the fixing station of a non-mech

Details Ultrasonic measuring sensor for the fixing station of a non-mech Ultrasonic measuring sensor for the fixing station of a non-mech

1982-03-22

1984-01-10

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

118712, 73290V, G01N 2902

Patent

active

044247010

ABSTRACT:
An ultrasonic measuring sensor for the fixing station of a non-mechanical printing or copying device has an electroacoustical transducer for both transmitting and receiving ultrasonic oscillation, and a reflector spaced a distance from the transducer for reflecting the oscillation transmitted by the transducer back to the transducer. The measuring path between the transducer and the reflector is surrounded by a fine mesh net having a mesh size which is significantly smaller than the wavelength of the ultrasonic oscillation. The mesh of the net is selected so as to permit the vapor concentration inside of the net to follow the changes in the average concentration at the fixing station with sufficient rapidity while shielding the measuring path against brief and topically limited concentration fluctuations.

REFERENCES:
patent: 3049810 (1962-08-01), Iwerks
patent: 3697936 (1972-10-01), Zacharias, Jr. et al.
patent: 4313343 (1982-02-01), Kobayashi et al.

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