Heidelberger Druckmaschinen Ag

Heidelberg Harris S.a.

Joel Bastard

Jean-Claude Marmin

The present invention relates to a device for holding a printing plate on a plate cylinder in a rotary printing press, and to a rotary printing press including such a device. The printing plate, retained by an anterior edge on the external surface of the plate cylinder, is furthermore retained by fastening a posterior end fold onto a hook which can move, with respect to the plate cylinder between a front limiting position in which it forms a projection on the external surface to allow this posterior end fold to be fastened or unfastened, and a rear limiting position in which it is retracted with respect to this external surface and retains the printing plate in tension, in the wound state on this cylinder. The mounting and dismantling of the printing press are thereby facilitated, and the printing gap is reduced to a minimum.

Plate cylinder

The invention relates to a device with an interchangeable leaf for holding a printing plate on a plate cylinder in a rotary printing press, and to a tool for dismantling the leaf. A leaf for fastening an edge of a printing plate onto the external surface of a plate cylinder penetrates into the latter via a slit and is mounted against a flat of a tension bar housed in the plate cylinder through the use of a passage receiving a end region of the leaf, of stop means for retaining the end region in the passage counter to movements other than the movement for extraction via the slit, and an elastic stop piece locking the end region by elastic clipping counter to such a movement but capable of being actuated by means of a flat tool inserted via the slit to release the end region. The mounting and dismantling of the leaf may thus be performed through the slit, without extracting the tension bar.

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Thiverny, France

Joel Bastard