Advancing material of indeterminate length – With material-responsive control means – Detector means
Patent
1996-01-05
1998-09-08
Stodola, Daniel P.
Advancing material of indeterminate length
With material-responsive control means
Detector means
B23Q 1500, B65H 2600
Patent
active
058033343
ABSTRACT:
An edge sensor working on ultrasonic principles is used to protect the edge of a travelling web and has a plurality of sensor units with adjacent or overlapping ultrasonic measurement fields between the transmitter and receiver of each unit. The units are switched so that only one unit serves to output a receiver signal when the edge crosses over into the respective measurement field.
REFERENCES:
patent: 3570624 (1971-03-01), O'Connor
patent: 5027993 (1991-07-01), Ferguson
patent: 5072414 (1991-12-01), Buisker
patent: 5274573 (1993-12-01), Buisker
Alt Gerhard
Krauth Wolfgang
Patel Arvind Ishwarial
Seibold Hans
Dubno Herbert
Erhardt & Leimer GmbH
Kaness Matthew A.
Stodola Daniel P.
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