Device for detecting shortage of products in a package

摘要

A device for detecting shortage of cigarette packs in a carton has a pair of first proximity sensors capable of individually detecting the cigarette packs at the opposite ends of the carton in an inspecting position, among other cigarette packs in the carton, and a plurality of second proximity sensors capable of individually detecting the remaining cigarette packs in the carton in the inspecting position, the interval between each two adjacent second proximity sensors being longer than the width of each cigarette pack.