Patent ID: 6460748
Filing Date: 2002-10-08
Classification: B65B

Abstract:
A device for adjusting a transverse position of a strip of packaging material on a packaging machine for producing packages containing a pourable food product, the device comprising:a slide movable in a first direction parallel to a feed plane of said strip and substantially perpendicular to a feed direction of said strip in said plane; gripping means carried by said slide and for gripping in sliding manner an edge of said strip; and adjusting means for adjusting the position of said slide in said first direction; characterized in that said adjusting means comprise an actuator for controlling said slide; a first sensor for detecting a first limit position of said strip and generating a first signal; a second sensor for detecting a second limit position of said strip and generating a second signal; and a control unit connected to said first and said second sensors, and which controls said actuator to move said slide towards said second limit position of said strip in response to a value of said first signal indicating said first limit position of said strip has been exceeded, and towards said first limit position of said strip in response to a value of said second signal indicating said second limit position of said strip has been exceeded, said first and said second sensors are optical sensors for detecting optical references of said strip, and said control unit comprising enabling means for enabling detection of said optical references with a predetermined sampling frequency.