Leading Edge Detection of Packages with a Thin, Flexible Edge

Frozen dinners go through many processes during secondary packaging before being stretch wrapped in large boxes for shipment. As frozen dinners come down the line, it’s important each dinner be individually placed into a bucket, so it can enter the carton magazine correctly. Detecting the leading edge of the plastic container—which is usually thin and can vary slightly in position—is essential to isolating dinners into buckets. This process requires a solution that can swiftly detect small objects that may or may not be in the exact position as the previous object.


Banner’s LX Series is an economical solution for detecting the leading edge of flat objects, such as the frozen dinner containers. With a web of modulated light, the LX Series part-sensing light screen can detect any item—in any position—passing through the light screen.

The LX Series’ response rate 0.8 to 3.2 ms prevents sensing delays and keeps the conveyor moving at the optimum speed for placing dinners in the bucket. With easy-to-see, bright LEDS on the emitter and receiver, data monitoring and processing is simple.

Because LX Series’ emitter and receiver do not require a synchronization wire, its wiring configuration is straightforward and efficient. The LX Series’ bipolar design offers NPN and PNP solid-state outputs with a rugged, self-contained housing.

LX Series

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