Cebal

Pechiney Emballage Alimentaire

Michel Philippe

Christophe Masse

A dry offset printing process using a printing apparatus including a) at least one inker block, each block inking a relief plate corresponding to one color of the final motif to be reproduced on an object and including an inker and a succession of transfer rollers, and b) a central blanket which can be placed into contact with the object to be decorated. An ink of suitable tackiness is selected, and the temperature of the ink is regulated in the inker to a predetermined temperature between 15.degree. and 30.degree. C.

Offset printing process and corresponding apparatus

A hollow metallic or metalloplastic element drawn or drawn-ironed from a decorated blank, and comprising an outer skirt decorated with an image formed from lines of dots of ink. The skirt has over its entire height which comprises zones of level h:2R at least equal to 0.5, a spacing between adjacent lines of dots of a same ink and an angle of inclination of the lines which are constant to better than a relative 1%.

Decorated hollow element

According to the invention, the surface of a blank to be shaped into a product is decorated by marking on a test blank a plurality of reference points distributed over the entire surface of the test blank which will be affected by the shaping. The test blank is then shaped into a test product and the positions of the reference points are determined. A block of decoration to be obtained on the product is formed, and the positions of the reference points on the test product are located on the block. The decoration is then converted into a plurality of pixels of each inking color, and the position of each pixel with respect to the reference points on the test product is located. A corresponding pixel position with respect to the reference points on the test blank is also determined, and a film is prepared by printing the film with each pixel of the decoration reproduced in a location corresponding to the corresponding location on the test blank. At least one blank is then decorated with the film.

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Vienne, France

Michel Philippe