Patent ID: 8248610

Claim:
A measuring method for measuring a web moving in the machine direction with a traversing measuring unit and an array measuring unit, of which the traversing measuring unit comprises at least one measuring part that moves in a direction transverse relative to the machine direction and of which the array measuring unit comprises at least two measuring parts successively in a direction transverse relative to the machine direction, the method comprising: measuring, with the traversing measuring unit, at least one characteristic of the web with a first radiation type from a plurality of measuring locations during the traversing movement at successive moments in time; measuring, with the array measuring unit, at least one characteristic of the web with another radiation type during each traversing movement of the traversing measuring unit at a plurality of different moments in time by measuring the web at each moment in time at a plurality of measuring locations; and estimating at least one characteristic measured by the traversing measuring unit with at least one measurement of the array measuring unit.