Mounting device for image cylinders
AssigneeDipl. Ing. Rudolf Hell GmbH
InventorsManfred Deisler, Ralf Balzeit, Reinhard Gesell, Bernd Lassen, Wolfgang Dinse
Life of this patent
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Abstract
An apparatus is disclosed on the basis whereof the image cylinders seated in cantilevered fashion in drum scanners can be mounted in the scanner in a short time running centrally regardless of the dexterity of the operator. This thus enables the preparation of the image cylinders (application of the images, etc.) outside of the apparatus, this leading to short standstill times of the scanner.
Claims7
A device for central, cantilevered mounting of an image cylinder on an end of a shaft of a drum scanner, said device comprising the image cylinder having a membrane at a mounting end and a tension ring with a projection, said membrane having a centrally extending center bore;
- said shaft having a stub end with a cone, said shaft having a flange adjacent said stub end;
- seating surfaces for the tension ring of the image cylinder being arranged on said flange;
- a plurality of clamping levers being mounted on the flange at circumferentially distributed positions by eccentric shafts having lever arms, each clamping lever having a link-like guide and a hook-shaped end facing toward the image cylinder, each clamping lever having a slide with a pin engaged in the link-like guide, each slide being mounted for a straight line movement parallel to the axis of the shaft and being engaged by a spring urging it in one direction, each slide having a coupler hinged thereto and extending to the lever arm for the clamping lever and each slide having a piston received in a pneumatic working cylinder, means evacuating one side of said cylinder to shift said piston against said spring so that releasing the vacuum in each cylinder allows the spring to shift the piston to a position to move the clamping levers into a gripping position for gripping the projection on the tension ring.
A device for a central, cantilevered mounting of an image cylinder on an end of a shaft of a drum scanner, said device comprising the image cylinder having an end flange at a mounting edge, said flange having a male member with a spherical head being centrally arranged at the flange;
- said end of the shaft of the scanner having a bore having an inside diameter corresponding to the diameter of the spherical head, said shaft of the scanner carrying a radial flange adjacent said end, three clamping levers uniformly distributed over the circumference of said radial flange and being mounted thereon by eccentric shafts having lever arms, three seating surfaces for engagement by a tension ring of the image cylinder being arranged on said radial flange, each of said clamping levers having a link-like guide and a hook-shaped end facing towards the image cylinder, each clamping lever having a slide movable against the force of a spring in a straight line parallel to the apparatus axis, each slide having a pin engaged in the link-like guide of the clamping lever and a coupler hinged to the slide and the lever arm for said clamping lever, each of said slides being connected to a piston disposed in a pneumatic cylinder having means to evacuate one side of the cylinder to shift the piston against the force of said spring;
- and a retaining hook being attached to the radial flange between two of said clamping levers, said retaining hook engaging a projection on the image cylinder for temporarily holding the image cylinder until the clamping levers engage said projection to mount the cylinder on said shaft with the head received in said bore.
Dependencies are inferred from the claim text.