Patent ID: 7347917
Filing Date: 2008-03-25
Classification: D21F,D21H,Y10T

Abstract:
1. A method of manufacturing paper comprising the steps of first bringing an elongate; flexible, impermeable element into contact with a support surface prior to their entry into a vat of aqueous paper stock, said element having a width of at least 6 mm, then depositing fibres onto the support surface to form paper, the deposition of fibres being carried out in such a manner that as fibres are deposited on the support surface, the elongate element is incorporated in the paper with regions of the element at least partially exposed at at least one surface of the paper at at least two sets of windows at spaced locations, said at least two sets of windows being formed by two sets of portions which are raised from the support surface relative to adjacent areas of the support surface, in which a first set of raised portions has a width transverse to a machine direction in which the paper travels during manufacture, which width is narrower than the width of the elongate element, and the second set of raised portions has a width transverse to a machine direction in which the paper travels during manufacture, which width is at least equal to the width of the elongate element, such that during manufacture of the paper the elongate element is brought into contact with both sets of raised portions, with edges of the elongate element being supported by the second set of raised portions, the second set of raised portions allowing paper fibres to deposit between the windows.