Printing plate registration using a camera
US7854199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2007 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Dec 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04787
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining the alignment of printing plate (14) mounted on an imaging drum (12), and applying an image to a printing plate while maintaining registration and alignment between the image and a reference edge (15) of the printing plate include mounting the printing plate on a plate-making machine (10) and then determining the locations of at least two points on the reference edge. The locations of two or more points are used to determine a transformation that is applied to image data to yield transformed image data (27). The transformed image data is used to image the printing plate. A method and apparatus for determining the locations of the points using backlighting avoids errors encountered in illuminating from the top.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.