Checking products with labels involves bringing product between light source and light-sensitive device, and measuring pattern and/or intensity of light falling through product

摘要

Products with labels are checked by bringing the product between a light source and a light-sensitive device. The pattern and/or intensity of light falling through the product is measured. The light-sensitive device produces a rejection signal if the pattern and/or the intensity do not agree with a pre-set pattern and/or intensity. Checking products with labels comprises forming and providing a product on one side, in particular an outer, with a label which, at least in fitted condition, forms at least one closed surface. The product is brought between a light source and a light-sensitive device (70). With the light-sensitive device, the pattern and/or intensity of light originating from the light source and falling through the product, in particular through and/or alongside the label, is measured. The light-sensitive device produces a rejection signal if the pattern and/or the intensity do not agree with a pre-set pattern and/or intensity. An independent claim is included for an apparatus for checking products with labels, comprising a feeding mechanism for feeding products, a light source and a light-sensitive device, and recognition mechanism for comparing a pattern of light originating from the light source and falling through the product. Signaling mechanisms are provided for producing a rejection signal if the pattern does not agree with a pre-set pattern.