Device for tensioning and adjusting flexible printing plates on plate cylinders of rotary presses
AssigneeKoenig & Bauer Aktiengesellschaft
InventorJurgen A. Stiel
Life of this patent
Estimating the term…
Abstract
A device for tensioning and adjusting flexible printing plates on plate cylinders of rotary printing presses, has as an object to achieve an automatic tensioning and a partial adjustment of the printing plates, in which the width of the cylinder groove as well as the transmission losses are kept low. According to the invention, this object is solved by that the pressure bar is movable in the radial direction via adjustment means, causing a tensioning- and adjustment movement of the printing plate tensioning bar via wedge areas on a secant, intersecting the cylinder groove at an angle of about 90.degree..
Claims11
Device for tensioning flexible printing plates on plate cylinders of rotary presses with a clamping- and tensioning bar, acting nearly tangentially in relation to a peripheral surface of the plate cylinder, arranged in a groove, extending parallely to an axis of the plate cylinder, and gripping the printing plate ends, characterized by the improvement that there is arranged a pressure bar, extending in the axial direction, which is movable in the radial direction at its one end, directing to an axis of rotation of said plate cylinder, by adjustment means arranged in said cylinder groove, said pressure bar being in effective contact with a tensioning bar through a slant, said tensioning bar having projections, on a secant, having a course by an angle (.beta.) in relation to the radial direction of movement, and which intersects said cylinder groove, so that said tensioning bar performs a tensioning movement and an adjustment movement.
Device for tensioning flexible printing plates on plate cylinders of rotary presses with a clamping- and tensioning bar,acting nearly tangentially in relation to the peripheral surface of the cylinder, arranged in a groove, extending parallely to the axis, and gripping the printing plate ends, characterized by the improvement that a pressure bar extending at an axial direction of the plate cylinder, is movable at its one end, directing to an axis of rotation, by adjustment means arranged in said cylinder groove, at first in the radial direction, that said pressure bar is cooperating with a slant, situated at its second end, directing to said periphery, at a counterslant, extending between an upper and a lower cylinder gap side wall whereby said pressure bar performs a small swivelling movement in the direction of a secant extending by an angle (.beta.) in relation to the radial direction of movement, which intersects said cylinder groove so that said tensioning bar generates a tensioning- and adjustment movement.
Dependencies are inferred from the claim text.