Method of producing at least one window opening in an...

B - Operations – Transporting – 65 – H

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Details

B65H 35/00 (2006.01) B42D 15/10 (2006.01) B65H 23/04 (2006.01)

Patent

CA 2662028

The invention relates to a method and an apparatus for producing at least one window opening (7) in an elongate paper substrate (1) which is divided virtually into paper sheet sections transversely with respect to its longitudinal axis. The method comprises the following steps: a) the paper substrate (1) is provided with at least one watermark (2) per paper sheet section; b) the position of at least one watermark (2) on the paper substrate (1) is detected by means of at least one sensor unit (3); c) the paper substrate (1) is then fed to a unit for producing openings in the paper substrate (1), which unit is actuated in such a way that at least one window opening (7) per paper sheet section is produced in the paper substrate (1) on the basis of the position of the at least one watermark (2), which position is detected by the at least one sensor unit (3).

L'invention concerne un procédé et un dispositif de réalisation d'au moins une ouverture (7) en forme de fenêtre dans un substrat oblong en papier (1) qui est virtuellement divisé en parties de feuille transversalement à son axe longitudinal. Le procédé comprend les étapes suivantes : a) le substrat en papier (1) est pourvu d'au moins un filigrane (2) par partie de feuille ; (b) la position d'au moins un filigrane (2) sur le substrat en papier (1) est détectée au moyen d'au moins une unité de détection (3) ; c) le substrat en papier (1) est ensuite apporté à une unité de réalisation d'ouvertures dans le substrat en papier (1), qui est asservie de telle sorte que, sur la base de ladite ou desdites positions du filigrane (2) détectées par ladite ou lesdites unités de détection (3), au moins une ouverture (7) en forme de fenêtre est créée dans chaque partie de feuille dans le substrat en papier (1).

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