Process for producing highly registered printed images and...

B - Operations – Transporting – 41 – F

Patent

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B41F 19/02 (2006.01) B41F 33/00 (2006.01)

Patent

CA 2529699

A process for making continuous stretchable substrate products comprising the steps of supplying a web of stretchable substrate having a first surface and a second surface, embossing at least one of the surfaces of the web substrate with an embossed image using at least one embossing roller (21), printing at least one of the surfaces of the web substrate with a printed image using at least one printing roller (31); wherein the embossed image and the printed image are disposed onto the substrate relative to each other such that a print/emboss registration is created, measuring the angular location of one embossing roller and translating that location into a digital signal, measuring the angular location of one printing roller and translating that location into a digital signal, manually zeroing the print/emboss registration; and automatically controlling the print and emboss rolls to maintain registration using a control program that comprises the steps of i) comparing the digital signal from the embossing roller and the digital signal from the printing roller, and ii) correcting the angular location and angular speed of either the embossing roll or the printing roller.

L'invention concerne un procédé de réalisation de substrats étirables continus selon les étapes suivantes : fourniture d'une bande de substrat étirable à première et seconde surfaces, emboutissage d'au moins une des surfaces avec une image en relief au moyen d'au moins un cylindre d'emboutissage (21), impression de la ou des surfaces avec une image imprimée au moyen d'au moins un cylindre d'impression (31). Les deux images sont placées en relation mutuelle d'implantation impression/relief, puis on mesure l'implantation angulaire du cylindre d'emboutissage et on convertit cette implantation en signal numérique. L'opération de mesure et de conversion considérée est répétée pour le cylindre d'impression, puis on ajuste manuellement l'implantation impression/relief et on contrôle automatiquement les cylindres d'impression et d'emboutissage pour maintenir l'implantation en utilisant un programme de contrôle qui permet i) de comparer le signal numérique du cylindre d'emboutissage et le signal numérique du cylindre d'impression, et ii) de corriger l'implantation angulaire et la vitesse angulaire du cylindre d'emboutissage ou du cylindre d'impression.

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