Method and device for length measurement of packaging webs
AssigneeTetra Laval Holdings & Finance S.A.
InventorLars Rodman
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Abstract
The present invention concerns a method and a device for absolute measurement of a print repeat length and/or at least one package length of a moving packaging web (1) in line with a printing machine. Normally the print repeat length and one package length are measured and analysed simultaneously. The measurements are made by means of a number of CCD-cameras (2, 3, 4) connected to a computer (6) by means of a frame grabber (7).
Claims17
(Amended) A method for measurement on a moving packaging web, wherein the absolute value of a print repeat length (PRL) and/or at least one package length (PL) are measured on the web in line with a printing machine.
(Amended) A length measuring device for a moving packaging web, wherein means are provided for absolute measurement of a print repeat length (PRL) and/or at least one package length (PL) of the packaging web in line with a printing machine.
Dependencies are inferred from the claim text.