Abstract: A method of inspecting the quality of blanks (2n) to be processed into packaging material, includes the following steps: A carrier (1) with a plurality of blanks (2n) is supplied. Each blank (2n) is identified in accordance with its position (n) on the carrier (1), and a scanned image (Sn) of each blank (2) is obtained, and each scanned image (Sn) is compared with a reference image (Rn) associated with the specific position (n) of the blank (2n) from which the image was taken. Based on the result of the comparison, the respective blank (2n) is accepted or rejected. Furthermore, there is a quality inspection system (10) comprising a digital imaging unit (12) for scanning images of blanks (2n) on a sheet (1), a unit (16) for generating individual reference images for each blank, a storage (18) for storing the individual reference images (Rn), and a comparator (20) for comparing scanned images (Sn) of a blank with the individual reference image (Rn) for this blank (2n).

Abstract: A method of inspecting the quality of blanks (2n) to be processed into packaging material, includes the following steps: A carrier (1) with a plurality of blanks (2n) is supplied. Each blank (2n) is identified in accordance with its position (n) on the carrier (1), and a scanned image (Sn) of each blank (2) is obtained, and each scanned image (Sn) is compared with a reference image (Rn) associated with the specific position (n) of the blank (2n) from which the image was taken. Based on the result of the comparison, the respective blank (2n) is accepted or rejected. Furthermore, there is a quality inspection system (10) comprising a digital imaging unit (12) for scanning images of blanks (2n) on a sheet (1), a unit (16) for generating individual reference images for each blank, a storage (18) for storing the individual reference images (Rn), and a comparator (20) for comparing scanned images (Sn) of a blank with the individual reference image (Rn) for this blank (2n).

Abstract: A method for determining the surface quality of a substrate passing from an initial state into a converted state during a conversion process including the steps of acquiring first information relating to surface defects detected on the initial substrate, acquiring second information relating to surface defects detected on the converted substrate, of processing the first information and the second information, and of classifying the converted substrate as a function of the first acquired information relating to the surface defects detected on the initial substrate and as a function of the second acquired information relating to the surface defects detected on the converted substrate.

Abstract: A method for determining the surface quality of a substrate passing from an initial state into a converted state during a conversion process including the steps of acquiring first information relating to surface defects detected on the initial substrate, acquiring second information relating to surface defects detected on the converted substrate, of processing the first information and the second information, and of classifying the converted substrate as a function of the first acquired information relating to the surface defects detected on the initial substrate and as a function of the second acquired information relating to the surface defects detected on the converted substrate.

Abstract: This automatic system (1) detects printing faults on metallized strips (3) or any other printing support comprising a predominance of specular color surfaces. The said system, arranged in a blackout casing (2), comprises an arm (30) on which there can move automatically a lighting unit (10) provided with a video camera (55). The camera has a variable-focus lens (56) which, through a semi-transparent filter (57) disposed in an oblique position in front of the lens, continuously films a portion of the strip (3) of a format (7) of variable size. The illumination of this strip portion is provided by two direct-illumination flashlights (12, 14), provided primarily to illuminate the non-specular surfaces of the strip, and by two other indirect-illumination flashlights (11, 13), advantageously provided to illuminate the specular color surfaces.