Insertion of an elongate element into a fibrous substrate

摘要

This invention is directed to improvements in manufacturing substrates, such as paper, incorporating an elongate element ( 13 ), to a method of and apparatus for making such paper and to documents made therefrom. The method comprises the steps of depositing fibres onto a moving support surface ( 10 ) to form a substrate ( 14 ) and introducing an elongate element ( 13 ) such that it is at least partially embedded in the substrate ( 14 ). Information pertaining to the location of a control feature of the elongate element ( 18 ) and the location of the substrate ( 17 ) are monitored and provided to a controller ( 16 ), which controls the tension of the elongate element ( 13 ) as it is introduced into the substrate ( 14 ). The location information is used to control the rate at which the elongate element is introduced so that the elongate element control feature is in registration with at least one control feature of the substrate ( 14 ).