Patent · US Expired

Apparatus and method for lithographic printing utilizing a precision emulsion ink feeding mechanism

US6698353B2 · kind B2 · utility

14Cited by
34References
18Claims
0Family size

Inventors

Key dates

Filing dateNov 20, 2001
Grant dateMar 2, 2004
Priority date
Expiry dateNov 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.