Method for recording and erasure of images using a...

B - Operations – Transporting – 41 – M

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B41M 5/26 (2006.01) B41M 5/30 (2006.01) G09F 3/00 (2006.01)

Patent

CA 2453064

A method for recording and erasure of images using a rewritable thermal label of the non-contact type which enables complete elimination of residual images after the erasure and repeated rewriting. The absorptivity of laser light used for the recording with the surface of the label is 50% or greater, the laser light irradiating the surface of the label for the recording has a wavelength of 700 to 1,500 nm and an amount of energy of irradiation of 5.0 to 15.0 mJ/mm2, the product of the amount of energy of irradiation of the laser light and the absorptivity of the laser light during the recording is 3.0 to 14.0 mJ/mm2, and the product of the amount of energy of irradiation of the laser light and the absorptivity of the laser light with the surface of the label during the erasure is 1.1 to 3.0 times as great as the corresponding product during the recording.

Une méthode d'enregistrement et d'effacement d'images au moyen d'une étiquette thermique réinscriptible de type sans contact qui permet la suppression complète d'images résiduelles après l'effacement et l'écriture répétés. L'absorptivité de lumière laser pour l'enregistrement avec la surface de l'étiquette est de 50 % ou supérieure, la lumière laser irradiant la surface de l'étiquette pour l'enregistrement ayant une longueur d'onde de 700 à 1 500 nm et une énergie d'irradiation de 5,0 à 15,0 mJ/mm2, le produit de la quantité d'énergie d'irradiation de la lumière laser et de l'absorptivité de la lumière laser pour l'enregistrement étant de 3,0 à 14,0 mJ/mm2, et le produit de la quantité d'énergie d'irradiation de la lumière laser et de l'absorptivité de la lumière laser avec la surface de l'étiquette pendant l'effacement étant de 1,1 à 3,0 fois plus grand que le produit correspondant pendant l'enregistrement.

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