Printing unit for blanket-to-blanket printing

Details Printing unit for blanket-to-blanket printing Printing unit for blanket-to-blanket printing

B - Operations, Transporting

41

F

B41F 9/08 (2006.01) B41F 7/12 (2006.01) B41N 10/00 (2006.01)

Patent

CA 2148627

The present invention relates to a printing unit for blanket-to-blanket printing. The printing unit includes two printing couples positioned one on top of the other. Each printing couple includes a form cylinder and a transfer cylinder. The transfer cylinders each carry a gap-free blanket. A horizontal web passes between the transfer cylinders of the two printing couples. In order to achieve good print quality with an advantageous web path, a plane connecting the centers of the transfer cylinders is inclined from a plane extending perpendicular to the web and passing through the center of one of the transfer cylinders by an angle (.alpha.) in the range from 0° to 10° and optimally by an angle of 5°.

Unité d'impression pour presse blanchet contre blanchet. Cette unité est constituée de deux couples d'impression placés l'un par-dessus l'autre. Chaque couple comprend un cylindre gravé et un cylindre de transfert. Les cylindres de transfert sont recouverts chacun d'un blanchet sans trous. Une bande continue horizontale passe entre les cylindres de transfert des deux couples d'impression. Afin d'obtenir une bonne qualité d'impression et un parcours de bande avantageux, un plan reliant les centres des cylindres de transfert est incliné à partir d'un plan s'étendant perpendiculairement à la bande et traversant le centre d'un des cylindres de transfert à un angle (alpha) de 0 à 10 degrés, mais de préférence à un angle de 5 degrés.

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