Apparatus for Monitoring a Print Result in a Rotary Printing Press

• US 20120013733A1
• Filed: 07/11/2011
• Published: 01/19/2012
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Eltromat GmbH (elexis AG)
• Original Assignee: Eltromat GmbH (elexis AG)
• Inventors: Koltermann, Oliver, Volkening, Dirk
• Granted Patent: US 8,817,091 B2
• Time in Patent Office: Days
• US Class Current: 348/125
• CPC Class Codes: B41F 33/0009 Central control units
• CPC Class Codes: B41F 33/0036 Devices for scanning or checking the printed matter for quality control
• CPC Class Codes: G01N 21/8901 Optical details; Scanning details per se G02B
• CPC Class Codes: G01N 21/956 Inspecting patterns on the surface of objects contactless testing of electronic circuits G01R31/308; testing currency G07D; manufacturing processes per se of semiconductor devices implementing a measuring step H01L22/10

Abstract

Apparatus for monitoring a print result in a rotary printing press, includes a web monitoring system including a matrix camera (20) that is movable in transverse direction over a web printed in the printing press, the matrix camera being adapted to capture an excerpt of the printed image in synchronism with a repeat of the printed image during a print run, an inspection system for a complete inspection of the printed image, the inspection system including a line camera that extends over the entire widths of the web, and an integrated control desk for the web monitoring system and the inspection system.

Claims

1. An apparatus for monitoring a print result in a rotary printing press, comprising:

a web monitoring system including a matrix camera that is movable in transverse direction over a web printed in the printing press, the matrix camera being adapted to capture an excerpt of the printed image in synchronism with a repeat of the printed image during a print run, and

an inspection system for a complete inspection of the printed image, said inspection system including a line camera that extends over the entire width of the web, and

an integrated control desk for the web monitoring system and the inspection system.

2. The apparatus according to claim 1, wherein the control desk has a touch screen for selectively displaying at least one of:

an image delivered by the matrix camera and

an image delivered by the line camera and for inputting operating instructions.

3. The apparatus according to claim 1, wherein the matrix camera has an optical zoom function.

4. The apparatus according to claim 1, further comprising a data processing system adapted to automatically detect errors in the image printed onto the web by analysing the image captured with the line camera and to display the errors visually on a screen of the control desk.

5. The apparatus according to claim 4, wherein the data processing system is adapted to indicate defective image areas by showing a mark on the touch screen and to interpret a strike of a user onto this mark as a command to display the image area on an enlarged scale.

6. The apparatus according to claim 4, wherein the data processing system is adapted to automatically adjust the matrix camera onto a position for a closer inspection of an error when such error has been detected in an automatic error detection process.