Ink level control system for offset printing presses
US5103728A · kind A · utility
16Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | May 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D9/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for monitoring and controlling the level of the ink in the ink fountain of offset printing presses, using an ultrasonic transducer for measuring the distance between the ink and the transducer which includes a microprocessor system for calculating a time duration of an ink feed cycle to fill the ink fountain to a preset ink level and for generating an ink cycle control signal based on time duration data and ink viscosity characteristics. A control valve activated by the ink cycle control signal delivers ink to the ink fountain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.