Authenticity Verification Methods, Products and Apparatuses
First Claim
1. An apparatus for analysing an article made of paper or cardboard placed in a reading volume, comprising:
- a scanner for scanning an article with a coherent optical beam;
a detector arrangement for collecting a set comprising groups of data points from signals obtained when the coherent beam reflects from the reading volume, wherein different ones of the groups of data points relate to signals obtained at different times during a scan of the reading volume; and
a data acquisition and processing module for processing the set of data points so as to determine whether the article possesses predetermined surface structure which gives rise to a predetermined class signature that identifies articles of a known generic type from the intrinsic properties of the article.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for determining a class signature from an article made of paper or cardboard in order to identify a generic type of class to which the article belongs. An optical beam illuminates the article and a detector arrangement collects data points from light scattered from many different parts of the article as the article is scanned by the beam. The class signature derives from intrinsic properties imparted to the paper/cardboard during manufacture by, it is believed, the screen used during dewatering of paper pulp. Detection of the class signature allows the manufacturer or the particular paper making machine that made the paper to be identified.
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Citations
33 Claims
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1. An apparatus for analysing an article made of paper or cardboard placed in a reading volume, comprising:
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a scanner for scanning an article with a coherent optical beam; a detector arrangement for collecting a set comprising groups of data points from signals obtained when the coherent beam reflects from the reading volume, wherein different ones of the groups of data points relate to signals obtained at different times during a scan of the reading volume; and a data acquisition and processing module for processing the set of data points so as to determine whether the article possesses predetermined surface structure which gives rise to a predetermined class signature that identifies articles of a known generic type from the intrinsic properties of the article. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of analysing an article made of paper or cardboard, comprising:
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placing an article in a reading volume; scanning the article with a coherent optical beam; collecting a set comprising groups of data points from signals obtained when the coherent beam reflects from the reading volume, wherein different ones of the groups of data points relate to signals obtained at different times during a scan of the reading volume; and processing the set of data points to determine whether the article possesses a predetermined surface structure which rives rise to a predetermined class signature that identifies articles of a known generic type from the intrinsic properties of the article. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A screen for manufacturing a paper or cardboard article, wherein the screen comprises a plurality of elements arranged and configured to impart a bespoke predetermined surface structure imprint pattern to a paper or cardboard article for providing a predetermined class signature that identifies the article as being of a known generic type, wherein the imprint pattern incorporates spatial modulation provided according to one or more of the following schemes:
- chirped modulation, surer-periodicity modulation, amplitude modulation, phase shift keying modulation, and frequency shift keying modulation.
- View Dependent Claims (24, 26, 27)
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25. (canceled)
- 28. A paper or cardboard article comprising a bespoke predetermined surface structure imprint pattern for providing a class signature when scatter from a coherent beam incident on the article is collected, for identifying the article as belonging to a known generic type.
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33-37. -37. (canceled)
Specification