Printing cylinder supporting unit, use of printing cylinder...

B - Operations – Transporting – 41 – F

Patent

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Details

B41F 15/38 (2006.01) B41F 13/44 (2006.01)

Patent

CA 2495187

Printing cylinder supporting unit for a printing machine, with a supporting frame (27) and supporting means mounted on said supporting frame for rotatably supporting one of several printing cylinders (1), which are designed so that in the operating state they make contact along a contact line (6) with a substrate (3) that is to be printed, which printing cylinders (1) can have different diameters, the supporting means comprising at least three supporting bearings (11.1, 12.1, 13.1), each of which interacts at the position of a bearing point with the bearing surface (5) of a bearing ring fixed concentrically on the printing cylinder (1). The bearing points lie on a common circle with variable diameter. The supporting bearings are movable in such a way that the bearing points move along lines that have a fixed position relative to the supporting frame (27), which lines intersect each other at a fixed reference point lying on the same common circle and in the operating state lying in a plane that is defined by the contact line (6) and the centre point of the common circle.

L'invention concerne une unité supportant un cylindre d'impression destinée à une machine à imprimer et comprenant un cadre de support (27) et des moyens de support montés sur ce cadre de support de façon à supporter, de manière rotative, un cylindre d'une pluralité de cylindres d'impression (1). En cours de fonctionnement, ces cylindres sont conçus pour entrer en contact avec un substrat (3) à imprimer le long d'une ligne de contact (6). Lesdits cylindres d'impression (1) peuvent présenter différents diamètres, les moyens de support comprenant au moins trois paliers de support (11.1, 12.1, 13.1), chacun d'entre eux coopérant au niveau d'un point d'appui avec la surface d'appui (5) d'une bague fixée de manière concentrique sur le cylindre d'impression (1). Les points d'appui sont situés sur un cercle commun présentant un diamètre variable. Les paliers de support peuvent se déplacer de sorte que les points d'appui se déplacent le long de lignes présentant une position fixe par rapport au cadre de support (27), ces lignes faisant intersection les unes avec les autres au niveau d'un point de référence fixe situé sur le même cercle commun et se trouvant, pendant un fonctionnement, dans un plan défini par la ligne de contact (6) et le point central du cercle commun.

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