Kba-Notasys Sa

Kba-Giori S.a.

Didier Dupertuis

Andrea Ganini

Maurizio Ripamonti

Daniel Baertschi

There is described an apparatus () for coating a cylinder (C), in particular a wiping cylinder of an intaglio printing press, with a plastic composition comprising inter alia a blade mechanism () comprising a single substantially planar blade () with a straight edge () extending along the full length of the cylinder to be coated and which is mounted rotatably about an axis parallel to the axis of rotation of the cylinder to be coated. The blade comprises, at its terminal end proximate to the cylinder, an inclined end portion () having an inverted-V shape rising from the upper side of the blade, the top edge of the inclined end portion forming the straight edge of the blade. The blade is adapted to be rotated so that the straight edge of the blade undergoes an upward movement substantially tangential to the periphery of the cylinder in order to discontinue the application of the plastic composition onto the surface of the cylinder.

Apparatus for coating a cylinder, in particular a wiping cylinder of an intaglio printing press

There is described an apparatus () for coating a cylinder (C), in particular a wiping cylinder of an intaglio printing press, with a plastic composition comprising inter alia heating means () for applying radiant heat to the cylinder throughout its length as the cylinder is rotated, the heating means including a plurality of discrete heating elements () distributed along the length of the cylinder and around at least part of the peripheral surface of the cylinder, the heating elements being arranged at least in separate columns (toO) disposed parallel to one another along the length of the cylinder. The apparatus further comprises a temperature sensing system () for measuring the surface temperature of the cylinder along the length of the cylinder and a processing unit coupled to the temperature sensing system () for controlling operation of the heating elements () as a function of the measured surface temperature and a desired temperature setting (t). The temperature sensing system () is adapted to output a temperature measurement profile (T) representative of the surface temperature of the cylinder measured along the length of the cylinder, the temperature measurement profile being subdivided into a plurality of zones (Zto Z) each associated to one corresponding column of heating elements (toO). Operation of each column of heating elements (toO) is controlled by the processing unit on the basis of the surface temperature measured within at least one of the zones (Zto Z).

There is described an apparatus () for coating a cylinder (C), in particular a wiping cylinder of an intaglio printing press, with a plastic composition comprising, inter alia, heating means () for applying radiant heat to the cylinder throughout its length, the heating means being disposed in a movable hood part () adapted to be moved on top of the cylinder for applying heat thereto or away from the cylinder to allow mounting or dismounting of the cylinder (C) on or from the apparatus. In the closed state, the hood part forms an interior space enclosing the cylinder. The hood part includes a hood body () and a window panel () mounted on a front side of said hood body to allow a human operator to monitor deposition of the plastic composition onto the surface of the cylinder. The hood body and window panel are constructed in such a manner that, when the hood part is moved on top of the cylinder, the window panel lies above the position where the coating unit () cooperates with the cylinder during coating.

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Goumoens-la-Ville, Switzerland

Didier Dupertuis