Device for tensioning a flexible printing plate mounted on a plate cylinder
AssigneeHeidelberger Druckmaschinen AG
InventorWilli Jeschke
Life of this patent
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Abstract
A device for tensioning a flexible printing plate mounted on a plate cylinder of a rotary printing machine having a device for pivoting the printing plate on the plate cylinder so as to provide a register correction, the printing plate having ends which are clamped in tensioning rails, include respective pivot levers via which the tensioning rails are articulatingly connected at both ends thereof, respectively, the pivot levers being pivotally mounted on a cylinder body, and a cam device for tipping and displacing the tensioning rails relatively to one another so that the printing plate is pivotable about a precisely defined pivot point.
Claims13
Device for tensioning a flexible printing plate mounted on a plate cylinder of a rotary printing machine having a device for pivoting the printing plate on the plate cylinder so as to provide a register correction, the printing plate having ends which are clamped in tensioning rails, comprising respective pivot levers mounted by a respective pivot on a cylinder body at or near either end of the plate cylinder and connecting the tension rails by respective connections to one another at or near both ends of the tension rails, said connections being ofset from the pivot so that movement about the pivot causes one end of the printing plate to move in one direction and the other end thereof in the opposite direction, and cam means for tipping and displacing the tensioning rails in common relatively to one another so that the printing plate is pivotable about a precisely defined pivot point.
A device for tensioning a flexible printing plate mounted on a plate cylinder of a rotary printing machine having a device for pivoting the printing plate on the plate cylinder so as to provide a register correction, the printing plate having ends which are clamped in tensioning rails, comprising respective pivot levers via which the tensioning rails are articulatingly connected to one another at both ends thereof, respectively, said pivot levers being pivotally mounted on a cylinder body, and cam means for tipping and displacing the tensioning rails in common relatively to one another so that the printing plate is pivotable about a precisely defined pivot point, said pivot levers for adjusting the tensioning rails being constructed as angular levers and being pivotally mounted on bearing bolts at the bottom of a cylinder channel formed in the cylinder body, said angular levers, respectively, having two legs each differing in length, each of said angular levers having a pivot point offset towards the shorter of said two legs thereof and, in a midposition of said angular levers, means located thereon for mutually connecting the tensioning rails and said angular levers are disposed on imaginary lines extending perpendicularly to a longitudinal axis of the plate cylinder.
Dependencies are inferred from the claim text.