Transparent printing blankets and methods of use

Details Transparent printing blankets and methods of use Transparent printing blankets and methods of use

B - Operations, Transporting

41

L

B41L 3/02 (2006.01) B41N 6/00 (2006.01) B41N 10/04 (2006.01)

Patent

CA 2294517

Substantially transparent printing blankets are provided comprising a substantially transparent printing layer (11) disposed upon a substantially transparent support layer (12). The substantial transparency of such printing blankets permits off press introduction of knock-out areas. In certain embodiments, this is accomplished by disposing the support layer (12) of the printing blanket adjacent to a substrate which bears either an image to be printed or some other print transfer information (such as a negative) corresponding to the image. The print transfer information then is viewed through the printing blacket to identify portions of the underlying substrate which bear information indicating that the print should not appear on a corresponding portion of the coated substrate. After such portions are identified, the printing layer (11) is removed from the support layer (12) in those areas of the printing blanket which are adjacent to the identified portions of the substrate.

La présente invention concerne des blanchets d'imprimerie substantiellement transparents qui comprennent une couche d'impression (11) substantiellement transparente, disposée sur une couche support (12) substantiellement transparente. La transparence substantielle desdits blanchets d'imprimerie permet d'introduire, en dehors de la presse, des zones de relief. Selon certains modes de réalisation, on obtient ce résultat en disposant la couche support (12) du blanchet d'imprimerie adjacent, sur un substrat qui porte une image à imprimer ou d'autres informations de transfert d'impression (par exemple, un négatif) correspondant à ladite image. Les informations de transfert d'impression sont, ensuite, visualisées par le blanchet d'imprimerie de façon à identifier des parties de substrat sous-jacent qui portent des informations indiquant que l'impression ne doit pas apparaître sur une partie correspondante du substrat revêtu. Une fois que lesdites parties ont été identifiées, la couche d'impression (11) est retirée de la couche (12), dans lesdites zones du blanchet d'imprimerie, qui sont adjacentes aux parties de substrat identifiées.

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