Ink-jet printer, and method of controlling ink quality of such ink-jet printer

Application Number: 00118825
Application Date: 2000.04.28
Publication Number: 1273912
Publication Date: 2000.11.22
Priority Information: 1999/4/28 FR 99/05362
International: B41J2/07;B41J2/195
Applicant(s) Name: Imaje SA
Inventor(s) Name: A. Panon;L. Frote
Patent Agency Code: 72001
Patent Agent: li efei
Abstract This invention relates to an ink jet printer and a method of managing the ink quality of such a printer, wherein information on ink pressure P, temperature T, jet speed V, and the nominal ink characteristics (rhon(T), mun(T)) is available. When the machine is started for the first time, the ink jet is varied at its nominal value and the resulting pressure is measured so as to determine the values a and b characteristic of the ink circuit, the characteristics of the utilized ink rho(T), mu(T), and the difference in level between the print head and the pressure transducer H. These values allow to set the desired pressure value and to take corrective action on ink quality.