Plant for obtaining sheets with optical effects

Details Plant for obtaining sheets with optical effects Plant for obtaining sheets with optical effects

B - Operations, Transporting

29

D

B29D 11/00 (2006.01) B29D 99/00 (2010.01) B29C 35/10 (2006.01) B29C 39/14 (2006.01) B29C 59/00 (2006.01) B29C 59/04 (2006.01) B29C 35/08 (2006.01)

Patent

CA 2239625

Plant for obtaining sheets with optical effects, said sheets (2) receiving the impression of various patterns and/or illustrations (a, b, c, d and e) and receiving a layer of transparent resin (1); the engraving of the resin, by contact and polymerisation, produces the optical effects. In the plant, the application of the resin (1) to the sheet (2) is effected by rotogravure, rotary serigraphy, flexography, offset or other means, directly to the engraving cylinder (4, 4', 4'' or 4''') or on the sheet (2); ultra violet rays (18) are used as polymerising element, optatively with filter (19) for infrared rays, or an electron generator; the engraving and polymerization of the resin (1) are done at the same time and with the use of an engraver cylinder (4, 4', 4'' or 4''') without any seam. The printing means, the engraving means and the polymerization means form a compact assembly (20) arranged in line on a rotary machine (21).

Istallation pour l'obtention de feuilles avec effets optiques, ces feuilles (2) pouvant recevoir l'impression de motifs et/ou illustrations divers (a, b, c, d et e) et également une couche de résine transparente (1). La gravure de la résine, par contact et polymérisation, produit les effets optiques. Dans l'installation, l'application de résine (1) à la feuille (2) s'effectue par rotogravure, sérigraphie, sérigraphie rotative, flexographie, offset ou autres moyens, directement sur le cylindre graveur (4, 4', 4'' ou 4''') ou bien sur la feuille (2). Comme élément polymérisateur, on utilise des rayons ultraviolets (18), optativement avec filtre (19) pour les rayons infrarouges, ou bien un générateur d'électrons. La gravure et la polymérisation de la résine (1) s'effectue en même temps et à l'aide d'un cylindre graveur (4, 4', 4'' ou 4''') ne présentant aucune jointure. Les moyens d'impression, les moyens de gravure et les moyens de polymérisation forment un ensemble compact (20) qui est disposé en ligne dans une rotative (21).

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