Michael D Christopher

US Patent:

6614558, Sep 2, 2003

Filed:

Mar 16, 1998

Appl. No.:

09/039575

Inventors:

Michael Duane Christopher - Dayton OH
David Flannery - Dayton OH
David R. Setiz - Vandalia OH
Eric J. Serenius - Springboro OH
Wei Zhao - Cincinnati OH

Assignee:

MDC Max Daetwyler AG

International Classification:

B41C 104

US Classification:

358 329, 358406, 700173, 700175

Abstract:

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. Other features include an autofocus routine to facilitate the auto-focus procedure. Also, image processing is further enhanced by gap filling, discontinuity removal, and light calibration methods which may be used alone, in combination with each other, or in combination with the automatic focus system and/or automatic shoe system.

US Patent:

57370907, Apr 7, 1998

Filed:

Apr 3, 1995

Appl. No.:

8/415638

Inventors:

Michael Duane Christopher - Dayton OH
David Flannery - Dayton OH
David R. Setiz - Vandalia OH
Eric J. Serenius - Springboro OH
Wei Zhao - Cincinnati OH

Assignee:

Ohio Electronic Engravers, Inc. - Dayton OH

International Classification:

B41C 104

US Classification:

358299

Abstract:

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. Other features include an autofocus routine to facilitate the auto-focus procedure. Also, image processing is further enhanced by gap filling, discontinuity removal, and light calibration methods which may be used alone, in combination with each other, or in combination with the automatic focus system and/or automatic shoe system.