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(11) | EP 1 630 285 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A method of manufacturing a fibrous substrate incorporating an elongate element |
| (57) This invention is directed to improvements in manufacturing substrates, such as paper,
incorporating an elongate impermeable element which is exposed at windows in both
surfaces of the substrates and a substrate made therefrom. The invention comprises
a method of making a fibrous substrate comprising the steps of bringing a first surface
of an elongate flexible impermeable element into contact with primary window forming
means provided on a moving cylinder mould support surface. Secondary window forming
means provided on a secondary moving surface are brought into contact with an opposing
surface of the element. Fibres are deposited onto the support surface and element
to form a fibrous substrate. The deposition of fibres is carried out in such a manner
that as the fibres are deposited onto the support surface the elongate element is
incorporated in the substrate. A first set of windows is formed in one surface of
the substrate at the point of contact of the element with the primary window forming
means, in which windows the element is at least partially exposed, and a second set
of windows is formed in an opposing surface of the substrate in which the elongate
element is also at least partially exposed.
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