Ultrasonic web edge guide circuit

Details Ultrasonic web edge guide circuit Ultrasonic web edge guide circuit

1990-02-06

1990-10-16

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With compensating features

318623, 318638, 226 16, 264 24, 4251742, B65H 23192, B06B 112

Patent

active

049638076

ABSTRACT:
An ultrasonic servo controller circuit is disclosed which is used to detect the edge of a web and adjust the web position as it is dispensed from a pay-off roll to packaging machinery. The circuit is utilized to control a motor which operates a linear actuator to "de-oscillate" the web thereby providing the packaging machinery with a steady, non-oscillating sheet of material.

REFERENCES:
patent: 3268140 (1966-08-01), Rouyer
patent: 3908880 (1975-09-01), Russmann et al.
patent: 3919560 (1975-11-01), Nopper
patent: 4049213 (1977-09-01), Hank et al.
patent: 4077579 (1978-03-01), Seleski et al.
patent: 4146797 (1979-03-01), Nakagawa
patent: 4291825 (1981-09-01), Glanz
patent: 4303189 (1981-12-01), Wiley et al.
patent: 4779782 (1988-10-01), Ricoux et al.
patent: 4901292 (1990-02-01), Schrauwen

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