Erhardt Leimer Gmbh

Texmag Gmbh Vertriebsgesellschaft

Wolfgang Krauth

Lars Zwerger

Juergen Eisen

Gerhard Brunner

Hans Seibold

Jürgen Eisen

Hang Seibold

Günter Franz

Some aspects relate to an apparatus for detecting an edge of a material web. In some examples, the apparatus comprises an ultrasound sensor which comprises two or more separately readable ultrasound receiver elements and an ultrasound transmitter element, wherein the ultrasound transmitter element is designed and arranged such that it applies an ultrasound measurement signal to two or more of the ultrasound receiver elements.

Apparatus for detecting an edge of a material web

A device for detecting a selvage of a material web or the selvage position in one measuring direction. The device comprises at least one ultrasonic sensor, with the ultrasonic sensor comprising a transmitter element and a receiver element. The external contour of at least one of the transmitter elements and/or of the receiver elements comprises at least one arc segment side and at least one flattened side.

Device for detecting a selvage of a material web

A method and an apparatus () are used to detect the position of the edge () of a moving product web (). The apparatus () has piezoelectric elements (), which firstly output ultrasonic pulses () and secondly pick them up and convert them into an electrical signal. The product web () is arranged between the piezoelectric elements () and a reflector () for this purpose. If the product web () is located in the measurement range of the piezoelectric element (), it attenuates the ultrasonic pulses as a result of reflection or absorption during the double passage of the latter. The position of the product web edge () is calculated from this attenuation.

Method and apparatus for detecting the position of the edge of a moving product web

Edge sensor for a moving strip of material

A photo-electric scanning device 1, with tubular housings 2, 3 with light source 15 and receiving element 16 and 17, respectively, arranged transversely and enclosing a web between them. The receiving element 17 cooperates with the light source 15 either according to the reflection principle or the light barrier principle. For light source 15 two receiving elements 16, 17 are provided which are capable of being actuated, of which either the first 16 cooperates with the light source 15 according to the reflection principle or the second 17 according to the light barrier principle. The first receiver 16 is closer to the light source 15 than the second receiving element 17. In this manner, operation is continuous with both receiving elements 16, 17.

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Friedberg, Germany

Wolfgang Krauth