Apparatus and method for detecting printing press web breakage

Details Apparatus and method for detecting printing press web breakage Apparatus and method for detecting printing press web breakage

D - Textiles, Paper

21

G

D21G 5/00 (2006.01) G01N 29/22 (2006.01) G01N 29/27 (2006.01) G01N 33/34 (2006.01)

Patent

CA 2183408

An apparatus for detecting breakage of a web of material traversing a machine for feeding the web, and a method for the same. The apparatus includes a housing for mounting three transducers, a first transducer adapted to periodically emit a burst of energy for a period of time, the burst of energy being reflected off an object and producing an echo signal. A second transducer adjacent to the first transducer receives a portion of the echo signal, and a third transducer also adjacent to the first transducer receives another portion of the echo signal. The strongest portion of the echo signal is used to detect whether the web is broken.

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