Apparatus and method for lithographic printing utilizing a precision emulsion ink feeding mechanism
US6698353B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 20, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Nov 20, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2231/21
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A control system for regulating the composition of an emulsion ink made from an oil-based ink and a water-based fountain solution using a mixing and dispersing apparatus includes a liquid level sensor, means responsive to the liquid level sensor for maintaining a proper liquid level in the mixing and dispersing apparatus, and means for producing an emulsion ink with a water content value which is within a predetermined range from a desired water content value. The producing means includes a feedforward controller and a feedback controller for regulating water-based fountain solution input rate to the mixing and dispersing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.