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Ink Concentration Control System for Continuous Ink Jet Printers

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Continuous ink jet printers have been widely used for industrial marking such things as bar codes and product dates. An electronically controlled drop to ensure accurate printing positioning carries out the printing. An ink concentration control system has been developed to improve stability of the drop formation and printing quality. The key features are a unique in-line viscometer and an ink concentration control system. The ink concentration is constantly monitored by measuring ink viscosity and temperature, and the ink concentration control system can always maintain the concentration accurately by adjusting the ratio of solvent in the ink. The viscometer consists of a plunger moving vertically in a cylinder, a solenoid to raise the plunger by electromagnetic force and a proximity sensor to detect the position of the plunger. The ink viscosity can be calculated by the fall time of the plunger from the top to the bottom in the cylinder. The viscometer can measure it rapidly (in a few seconds), precisely, and automatically. Also, the reliability of the viscometer can be improved by measuring the fall time of the plunger repeatedly in a short period.

Document Type: Research Article

Publication date: 2004-01-01

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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