Method of controlling the relative position between printed patterns and non-printed patterns on a web-shaped material and a system used in the method
First Claim
1. Method of controlling the register, between a printed pattern and a non-printed pattern, with high accuracy, on a running material web, comprising:
- a) printing at least one printed pattern and at least one, printed, two-dimensional, register mark on the web,b) creating a non-printed pattern or recurring feature on the web, steps a) and b) being carried out in any order,c) simultaneously, and in synchronisation with the operation of carrying out step b), impressing an indentation having a three-dimensional topographic configuration such that a shadow is created from the indentation when illuminated, on the web at a pre-determined distance from the printed register mark, the indentation thereby producing a dark spot when illuminated,d) determining the position of the said shadow or dark spot relative to the position of the printed mark by illuminating and detecting with an optical sensor system, the shadow being detectable by the same optical sensor system as used for detecting the printed mark,e) comparing the value of the measured position of the shadow created from the impressed indentation relative to the position of the printed mark with a pre-set value, andf) regulating the operation of creating said non-printed pattern or recurring feature as well as said synchronised, impressed indentation and/or regulating the printing operation, in order to adjust the measured value to the pre-set value.
1 Assignment
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Accused Products
Abstract
A method and a system for controlling the relative position between a printed pattern and a non-printed pattern, such as for example a pattern of creasing lines or holes, on a running web-shaped material, involves providing the material web with at least one impressed indentation mark with a three-dimensional topographic configuration, at a pre-determined distance from a printed register mark and detecting the marks with a same sensor control system. The controlling method and system is used for the manufacturing of a laminated packaging material, having a printed décor and creased folding lines in register.
17 Citations
29 Claims
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1. Method of controlling the register, between a printed pattern and a non-printed pattern, with high accuracy, on a running material web, comprising:
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a) printing at least one printed pattern and at least one, printed, two-dimensional, register mark on the web, b) creating a non-printed pattern or recurring feature on the web, steps a) and b) being carried out in any order, c) simultaneously, and in synchronisation with the operation of carrying out step b), impressing an indentation having a three-dimensional topographic configuration such that a shadow is created from the indentation when illuminated, on the web at a pre-determined distance from the printed register mark, the indentation thereby producing a dark spot when illuminated, d) determining the position of the said shadow or dark spot relative to the position of the printed mark by illuminating and detecting with an optical sensor system, the shadow being detectable by the same optical sensor system as used for detecting the printed mark, e) comparing the value of the measured position of the shadow created from the impressed indentation relative to the position of the printed mark with a pre-set value, and f) regulating the operation of creating said non-printed pattern or recurring feature as well as said synchronised, impressed indentation and/or regulating the printing operation, in order to adjust the measured value to the pre-set value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system used in a method of manufacturing a material web having a printed pattern in register position with a non-printed pattern or recurring feature on the material web, comprising:
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g) a station for providing a printed material web, wherein at least one pattern is printed together with at least one, printed, two-dimensional register mark on the web, h) a station for creating a non-printed pattern or recurring feature on the web, and, impressing means for simultaneously, and in synchronisation with the creation of the non-printed pattern or feature, creating an indentation having a three-dimensional topographic configuration, such that a shadow is created from the indentation when illuminated, on the web at a pre-determined distance from the printed register mark, i) an optical sensor system for determining the position of the said shadow relative to the position of the printed mark by detecting the shadow produced by said three-dimensional indented configuration when illuminated, and by simultaneously detecting the printed mark(s), j) a comparison means for comparing the value of the measured position of the shadow relative to the position of the printed mark with a pre-set value, and k) controlling means for regulating the operation of creating said non-printed pattern or recurring feature as well as said synchronised, impressed indentation and/or for regulating the printing operation, in order to adjust the measured value to the pre-set value. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification