Mdc Max Datwyler Bleienbach Ag

Mdc Max Datwyler Ag

Max Datwyler

In an engraving head for apparatus for engraving printing cylinders, a drivable engraving tool and a sensing organ contacting any printing cylinder being engraved by the drivable engraving tool are mounted on a common fixture. A damping element is located between the sensing organ and the engraving tool for at least substantially barring transmission of oscillations from the sensing organ to the engraving stylus, while preserving a firm and accurate guidance of the drivable engraving tool by the sensing organ contacting the printing cylinder. Damped sleeve structures and collets for mounting a sensing stylus include such damping elements.

Engraving head for apparatus for engraving printing cylinders

During electrolytical treatment, a printing cylinder is held between center points, of which one is provided adjustably with a centering sleeve in a tail spindle. A belt connects the tail spindle in force transmitting relationship to a drive. The tail spindle is axially displaceable together with the inner housing of the apparatus, so that an electric contact ring at the end of the tail spindle is engageable with the front surface of a printing cylinder. The current conduction to the contact ring takes place via cooled carbon brushes located between the tail spindle bearings and the contact ring. A current conducting sleeve encompassing the end region of the tail spindle and being contacted by the carbon brushes, prevents the tail spindle carrying the printing cylinder from being exposed to electric current.

System for electrolytical treatment of printing cylinders

A flexible wrap-on printing plate structure has a flexible printing plate body extending between opposite first and second edges at which the printing plate structure is attached to a rotary printing form cylinder. A thickening of the printing plate body or other means extend along a third edge of the printing plate body between the mentioned first and second edges for mechanically stiffening the printing plate body along that third edge, so that no warping of the printing plate structure and no printout of printing plate margins can occur.

Wrap-on printing plate structures and assemblies

A wrap-on printing plate with first and second clamping bars along opposite sides thereof for installation on a printing cylinder is produced by providing a layer defining a printing plate body, forming from marginal portions of that layer, along opposite sides thereof, first and second foundations for the first and second clamping bars, respectively. These clamping bars are provided on such first and second foundations by interatomic bonding between the first and second foundations and the first and second clamping bars, respectively. To this end, the layer may, for instance, be electroplated on existing clamping bars in a special form, or, as presently preferred, material from which the first and second clamping bars are formed may be electroplated on the first and second foundations formed in marginal portions of the mentioned layer.

Growing community of inventors

Langenthal, Switzerland

Max Datwyler