Method and device for gravure printing using an erasable and...

Details Method and device for gravure printing using an erasable and... Method and device for gravure printing using an erasable and...

B - Operations, Transporting

41

N

B41N 1/06 (2006.01) B41N 3/00 (2006.01)

Patent

CA 2628155

The invention relates to a method and a device for gravure printing using an erasable and re-usable printing form. The starting point of said method is a gravure printing form comprising a basic grid that is designed for the maximum quantity of ink that is transferred, said grid being uniformly filled in a filling process, a pattern being created by thermal ablation and the gravure printing form being erased after the printing process. The aim of the invention is to provide a method and device with which the complete removal of the filler material can be performed in a justifiable time in a reliable manner, even outside the printing press. To achieve this, the filler material and the residual ink is removed by a separate laser beam from that of the image-point transfer device.

L'invention concerne un procédé et un dispositif d'héliogravure au moyen d'une forme en creux effaçable et réutilisable, à partir d'une forme en creux brute présentant une trame de base appliquée au moins sur la quantité maximale d'encre à transférer et remplie uniformément en une opération de remplissage, les images à imprimer étant gravées par ablation thermique et une opération d'effacement étant effectuée sur la forme en creux après l'impression. L'objectif de cette invention est de permettre d'effectuer une élimination complète et fiable de la substance de remplissage en un temps raisonnable même à l'extérieur de la presse. A cet effet, la substance de remplissage et l'encre restante sont éliminées au moyen d'un faisceau laser séparé du dispositif de transfert de points d'image.

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