Detection of Print Marks on Sachet Packaging via Contrast Sensors
In vertical packaging machines, loose products, granules, powders, pastes or difficult-to-process products are packaged into small, uniform sachets, also known as sealed edge pouches. To ensure consistent product quality and package size in series production machines, small contrast marks are applied to the film material. A contrast sensor with a small, round white light spot reliably detects these marks and can thus precisely control the sealing process.
Contrast Sensors
Contrast sensors with switching or analog output measure the brightness of objects. Sensors with switching output compare the brightness level with a reference value in order to detect contrast marking, for example. Sensors with analog output provide the measured brightness as a proportional voltage signal in order to monitor brightness curves, for example.
