Basf Aktiengesellschaft

Joachim Dorow

Gerhard Bleckmann

In an apparatus for clamping printing plates for printing presses comprising two clamping strips which are displaceably arranged in a cylinder recess and held by two leaf springs and hook under an end region of the printing plate to be clamped and whose outer contours, in the clamped state, have a curvature corresponding to the cylinder curvature and each of which is bounded by a thrust surface which engages a bent-over edge claw of the printing plate to be clamped, a resilient hose being inserted between the thrust surfaces of the clamping strips and the clamping strips themselves, the clamping strips are adjustable on the one hand in the clamping direction of the printing plates by means of two cams arranged in depressions and on the other hand in a direction opposite to the clamping direction of the printing plates by means of a cam arranged between the leaf springs and in the vertical plane of symmetry of the cylinder.

Apparatus for clamping printing plates

The gap between the ends of a gravure printing plate (3) clamped on a plate cylinder (1) is closed by an apparatus having a gap (5) -covering plate (6) and means for filling the gap cavity with plastic and curable material, consisting of two shaped pieces (7), which are mounted on the shaft ends of the plate cylinder, and a section (8) which is firmly connected to the shaped pieces and in which two displaceable pressure bars (9) are incorporated, wherein a plurality of pressure screws (10) distributed over the length of the pressure bars are arranged above each of the pressure bars.

Apparatus for closing the gap between the ends of a gravure printing

Apparatus for clamping printing plates for rotary printing presses, having one or more clamping strips which are arranged so that they are laterally displaceable in a cylinder recess, which grip under an end region of the plate to be clamped and whose outer contour has a curvature corresponding to the cylinder curvature and is bordered by a pressure surface which engages a bent-over edge claw of the plate to be clamped, an insertable, resilient strip being inserted between the pressure surfaces of the clamping strips and a compression strip which is adjustable radially with respect to the cylinder circumference, wherein the clamping strip is adjustable in the clamping direction of the printing plates by means of two or more hydraulic cylinders which are supported at their rear and on the adjacent cylinder wall.

An apparatus for lining a form cylinder for gravure printing with a wrap-around plate is characterized by a machine frame having insertion apertures (3) provided in the area of its side walls (2) and allocated to the lateral journals (4) of the form cylinder (5), and having a swivel frame (10) which is pivotably mounted outside the insertion apertures (3), can be fixed relative to the machine frame and accommodates a drivable pressing roller (7) mounted in rotatable eccentric bushes. In this way, the wrap-around plate can be rolled onto the form cylinder, so that a full, uniform seating of the wrap-around plate on the cylinder periphery is ensured even when the form cylinder possesses no adjustable clamping device.

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Hassloch, Germany

Joachim Dorow