Method of illustrating an erasable printing form

Details Method of illustrating an erasable printing form Method of illustrating an erasable printing form

B - Operations, Transporting

41

C

B41C 1/055 (2006.01) B41C 1/10 (2006.01) B41F 30/04 (2006.01) B41F 35/04 (2006.01) B41J 27/16 (2006.01) B41N 1/08 (2006.01) G03G 9/12 (2006.01) G03G 15/02 (2006.01) G03G 15/10 (2006.01) G03G 15/34 (2006.01)

Patent

CA 2195826

A method for imaging a printing form in which the printing form is charged on its entire surface and is coated on its entire surface with particles, in particular toner particles, which bear the opposite charge. The layer formed by the particles is then fixed in accordance with the image by a beam, in particular a laser beam, and especially by infrared radiation, on the surface of the printing form or ablated in accordance with the image. Thereupon, the unfixed portions of the layer are removed or the non-ablated portions are fixed by full-surface heat treatment.

L'invention est une méthode de production d'images sur une feuille de tirage entièrement électrisée et entièrement recouverte de particules, en particulier de particules de toner, porteuses de charges électriques de signe opposé. La couche de particules est alors fixée d'après l'image au moyen d'un faisceau, en particulier d'un faisceau laser et plus spécialement au moyen de radiations infrarouges, sur la feuille de tirage, ou est ablatée d'après l'image. Les parties non fixées de la couche sont ensuite enlevées; si l'on utilise l'ablation, les parties non ablatées sont fixées par chauffage de l'ensemble de la surface.

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