Method and system for verifying correct mounting of a printing plate on an external drum imaging machine
US6794626B2 · kind B2 · utility
42Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jan 18, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A printing plate mounted on an external drum platesetter is verified to be securely fastened to the drum using an autofocus system prior to spinning the drum to maximum operating speed. An autofocus mode is employed to set a reference signal using a light beam and light sensor. After establishing the reference signal at one end of the plate, the system switches to a second mode of operation where the autofocus system is fixed, and the reference signal is monitored as the drum and plate are rotated. If the reference signal deviates from the initial value, the rotation of the drum is stopped and an operator is alerted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.