Ohio Electronic Engravers, Inc.

Mdc Max Daetwyler Ag

Ohio Electronics Engravers, Inc.

Paul L Holowko

Curtis Woods

John W Fraser

David R Seitz

Eric J Serenius

Eric Serenius

An engraver having an engraving signal generating system for engraving a workpiece. The engraver includes a setup circuit enabling direct dimensional control of the cavities engraved by the engraver. Controls are provided for setting at least one of a plurality of parameters, such as a black cell width. These parameters are fed to the setup circuit which translates them into multiplication factors for an AC signal and a videosignal. The multiplied signals are combined with an offset signal to produce an engraving signal.

Apparatus and method for engraving a gravure printing cylinder

An engraver having an engraving signal generating system for engraving a workpiece. The engraver includes a setup circuit enabling direct dimensional control of the cavities engraved by the engraver. Controls are provided for setting at least one of a plurality of parameters, such as a black cell width, a black channel width and a highlight cell width. These parameters are fed to the setup circuit which translates them into multiplication factors for an AC signal and a video signal. The multiplied signals are combined with an offset signal to produce an engraving signal.

Engraving system and engraving signal generator for engraving workpieces

An error detection apparatus and method for use with engravers, such as gravure engravers. An error value E corresponding to the difference between a set of predetermined setup parameters and actual measurement of a portion of an engraved area on the cylinder is determined. The error value E is then used to adjust the engraver to engrave an actual cut or etch in accordance with the set of predetermined setup parameters. The error detection and correction system a closed-loop system for engraving a cylinder. The apparatus and method may be used during initial setup or during normal operation of the engraver. A method is disclosed comprising the steps of engraving ink receptive cells in the surface of a rotating gravure printing cylinder consisting of the steps of generating a cell width command signal comprising a series of cell width commands, engraving the cells by using the cell width command signal to urge an engraving stylus into periodic engraving contact with the surface, measuring actual widths of cells which have been engraved as aforesaid, and adjusting the cell width command signal in correspondence with differences between the actual widths and the cell width commands.

Error detection apparatus and method for use with engravers

The invention provides a method for controlling the engraving head and the response of the engraving head in response to a plurality of engraving setup parameters which may be input into a computer associated with the engraving head and automatically generating a response signal for energizing the engraving head in response to the plurality of engraving setup parameters which were input in real units. The method further provides that adjusting one or more of the engraving setup parameters in real units may be performed. Further, the method provides for multiplying either an AC input signal or a video signal by a multiplication factor which is generated by the setup circuit to produce the driving signal.

Method for automatically controlling an engraver in response to a

An error detection apparatus and method for use with engravers, such as gravure engravers. An error value E corresponding to the difference between a set of predetermined setup parameters and actual measurement of a portion of an engraved area on the cylinder is determined. The error value E is then used to adjust the engraver to engrave an actual cut or etch in accordance with the set of predetermined setup parameters. Advantageously, an error detection and correction system is suitable for providing a closed-loop system for engraving a cylinder. The apparatus and method may be used during initial setup or during normal operation of the engraver.

Apparatus for engraving a gravure printing cylinder includes a setup circuit enabling direct dimensional control of the cavities engraved by a stylus. Controls are provided for setting a black cell width, a black channel width and a highlight cell width. These parameters are fed to the setup circuit which translates them into multiplication factors for an AC signal and a video signal. The multiplied signals are combined with an offset signal to produce a driving signal for the stylus.

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Spring Valley, OH, United States of America

Paul L Holowko