Procedure for imprinting a filigree pattern on sheet of paper

B - Operations – Transporting – 31 – F

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B31F 1/07 (2006.01) B41M 3/10 (2006.01) D21H 25/00 (2006.01) D21H 27/02 (2006.01) D21H 21/26 (2006.01)

Patent

CA 2428583

La présente invention concerne un procédé pour marquer un motif (9) de type filigrane, sur une partie au moins d'une feuille (8) de papier absorbant, ledit procédé consistant à déformer sous contrainte ladite feuille par passage entre au moins un premier rouleau lisse (1) et au moins un deuxième rouleau grave (2). Selon l'invention, on applique à froid une pellicule d'additif sur l'une au moins desdites surfaces de la feuille lors du marquage, ce qui favorise la formation du filigrane. L'invention vise également une feuille de papier absorbant comprenant au moins un pli d'ouate de cellulose et obtenue par le procédé.

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