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US 6,480,655 B1Granted
Apparatus for the measurement of paperboard strain in a confined area
AssigneeMeadeWestvaco Corporation
InventorsJeffery Alan Fisk, Richard Eric Nordgren
Life of this patent
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Abstract
This invention concerns a technique and an apparatus that is used for the measurement of bi-axial strain in printed paperboard or paperboard based laminates. Such strain information is useful for determining the margin to failure of various features of laminated paperboard cartons, such as those used in the liquid packaging industry. Knowing such margins of failure is crucial for ensuring integrity of the microbiological barrier in aseptic liquid packaging.
Claims9
An apparatus for measuring paperboard strain comprising:
- a fiber optic scope means;
- a fiber optic tube means operatively connected to said fiber optic scope means, wherein said fiber optic tube means comprises a plurality of concentric tubes;
- and
- an adjustable stand-off means operatively connected to said fiber optic tube means for constraining a focal length between an end of said fiber optic scope means and a surface of said paperboard.
1 more element
Dependencies are inferred from the claim text.