Touch-readable product and associated process

Details Touch-readable product and associated process Touch-readable product and associated process

G - Physics

09

B

G09B 21/02 (2006.01) B41M 3/16 (2006.01) G09B 21/00 (2006.01)

Patent

CA 2223758

The economic production of raised printed characters such as Braille is achieved by a "screen printing" process, using a rotational printing machine in combination with high viscosity, "U/V" inks that make possible the depth of deposition and character solidity necessary for achieving the required tactile effect in order to be "readable" by touch. The high body ink of the thus formed characters is cured comparatively rapidly by exposure to U/V light, so that the high drying rate thus obtained enables the achievement of economically effective rates of production. It is found that raised patterns of significantly lesser prominence than for embossed Braille, as produced by the printing process, are readable on a short-term basis, even by trainee "readers".

Afin de produire de manière économique des caractères saillants d'imprimerie (25) tels que les caractères de l'écriture Braille, on met en oeuvre un procédé d'impression sérigraphique en utilisant une rotative (10) et des encres "U.V." (20) de haute viscosité qui permettent d'obtenir la profondeur de dépôt et la solidité nécessaire pour que les caractères puissent être perçus et "lus" par toucher. L'encre à corps saillant des caractères ainsi formés (25) est durcie de manière relativement rapide par exposition à la lumière ultraviolette; la haute vitesse de séchage ainsi atteinte permet un rendement économique. On a découvert que les motifs saillants (25) d'une hauteur sensiblement moins élevée que celle des caractères Braille gravés peuvent être lus en très peu de temps, même par des lecteurs "novices" de ce type de caractères.

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