Ohio Electronic Engravers, Inc.

Mdc Max Daetwyler Ag

Ohio Electronics Engravers, Inc.

Kenneth William Jackson

Tony D Beckett

David R Seitz

John W Fraser

Eric J Serenius

David L Flannery

Eric R Auberry

Neal Clements

Mark Burns

Louis Jacques Duchesneau

An engraving method and apparatus for engraving a cylinder for printing an intaglio pattern and/or non-intaglio pattern on a web of material. The engraver includes a driver for rotatably driving the cylinder and a computer for controlling the operation of the engraver and for generating an intaglio engraving signal corresponding to an intaglio pattern and a non-intaglio signal for a gravure pattern. The engraver also uses an engraving head for engraving the cylinder with the intaglio pattern and the gravure pattern during the rotation of the cylinder in response to the intaglio engraving signal and non-intaglio signal. The invention includes an intaglio engraved pattern and method for engraving engraved areas having bottoms which are generally planar.

Engraving system and method for engraving intaglio and non-intaglio patterns

This invention relates to a system and method for intelligently placing in a periodic and/or random manner a plurality of whetting areas which facilitate lubricating and/or cooling a doctor blade in a printing press when the cylinder is placed therein. The system and method includes one or more routines which analyzes engraving/etching data and any associated white-span length. One or more whetting areas are placed in a periodic or random pattern in response thereto. The whetting areas facilitate lubricating and/or cooling the doctor blade so that it does not heat beyond a predetermined level, thereby avoiding scoring of the cylinder and problems associated with deterioration of print quality or length of cylinder life resulting from thermo-dynamic expansion and/or undesired evaporation of ink associated with areas which make up the image.

System and method for improving printing of a leading edge of an image in a gravure printing process

This invention relates to an engraving method and apparatus for engraving a cylinder for printing an intaglio pattern on a web of material. The engraver comprises a driver for rotatably driving the cylinder and a controller for controlling the operation of the engraver and for generating an intaglio engraving signal corresponding to the predetermined intaglio pattern. The engraver also comprises an engraving head comprising a stylus having a generally flat cutting edge or surface. The engraving head also is capable of engraving at response times of less than 200-300 microseconds, thereby enabling the engraving head to engrave the intaglio pattern on the cylinder during the rotation of the cylinder in response to the intaglio engraving signal. The apparatus and method also comprise a fine line boost routine for facilitating engraving fine areas or lines of the intaglio pattern. There is also provided apparatus and method for controlling ink flow in large engraved areas or intaglio trenches. The apparatus and method facilitate engraving intaglio grooves or trenches which may be generally rectangular in cross section, and which were engraved in response to a pulse-width modulated intaglio engraving signal generated by the controller. In another embodiment of the invention, a system and method or process for engraving a mixed pattern of non-intaglio and intaglio engraved areas is shown. The invention also includes a system and method for engraving mixed patterns of intaglio and non-intaglio areas. In this regard, a controller associated with the engraver analyzes the image data and differentiates the non-intaglio data from intaglio data so that it can be signed an appropriate feed rate for the intaglio and non-intaglio patterns. Using the feed rates, the mixed patterns are engraved.

Method and apparatus for engraving a mixed pattern

The invention is characterized in that it comprises a toolpath generating routine and system for generating a plurality of control points directly from image data representing an image to be engraved. The control points are used to generate a toolpath which, in turn, will be used to energize an engraving head such that a tool or stylus will engrave a pattern of engraved areas in response to the toolpath. An engraving system and method for engraving at least one engraved area is shown having an engraving head tuner for tuning an engraving head such that the frequency characteristic of the engraving head defines a substantially constant gain for frequencies less than a predetermined frequency. The invention is further characterized in that it incudes a system and method for interactively or automatically tuning the engraving head, interactively adjusting the filter characteristics (including the filter coefficients for the filters used on the engraving head) and for being responsive to the type of image data (whether continuous tone data or linework data). The invention is characterized in that it synthesizes the screening function so as to more accurately reproduce the image to be engraved by engraving multiple frequency cells where single cells would be engraved in the past.

Engraving system and method with arbitrary toolpath control

An engraving method and apparatus for engraving a cylinder for printing an intaglio pattern and/or non-intaglio pattern on a web of material. The engraver includes a driver for rotatably driving the cylinder and a computer for controlling the operation of the engraver and for generating an intaglio engraving signal corresponding to an intaglio pattern and a non-intaglio signal for a gravure pattern. The engraver also uses an engraving head for engraving the cylinder with the intaglio pattern and the gravure pattern during the rotation of the cylinder in response to the intaglio engraving signal and non-intaglio signal.

Engraving system and method for engraving intaglio and non-intaglio

This invention relates to an engraving method and apparatus for engraving a cylinder for printing an intaglio pattern on a web of material. The engraver comprises a driver for rotatably driving the cylinder and a computer for controlling the operation of the engraver and for generating an intaglio engraving signal corresponding to the predetermined intaglio pattern. The engraver also comprises an engraving head comprising a stylus having a generally flat cutting edge or surface. The engraving head also is capable of engraving at response times of less than 200-300 microseconds, thereby enabling the engraving head to engrave the intaglio pattern on the cylinder during the rotation of the cylinder in response to the intaglio engraving signal. The apparatus and method also comprise a fine line boost routine for facilitating engraving fine areas or lines of the intaglio pattern. There is also provided apparatus and method for controlling ink flow in large engraved areas or intaglio trenches. The apparatus and method facilitate engraving intaglio grooves or trenches which may be generally rectangular in cross section, and which were engraved in response to a pulse-width modulated intaglio engraving signal generated by the computer.

Intaglio engraving method and apparatus

An engraving system for engraving printing cells in a gravure printing cylinder uses a video camera for feedback control of printing cell width. A setup procedure for the engraving system involves engraving an isolated test cell and a series of adjacent test cells, the latter being engraved under steady state engraving conditions. The isolated test cell is located through a search sequence which establishes a strobe control count for a strobe trigger unit. The strobe control count then is adjusted for steady state engraving by acquiring and centering a steady state test cell. Cell width is measured by creating video runtable sets for a plurality of overlapping video boxes and finding a maximum connected run length which meets predetermined acceptance criteria.

Growing community of inventors

Dayton, OH, United States of America

Kenneth William Jackson