Ink-jet recording method

Details Ink-jet recording method Ink-jet recording method

1996-07-05

1999-08-24

Hartary, Joseph

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

526260, 526258, B41J 205

Patent

active

059430800

ABSTRACT:
An ink-jet recording method comprises actuating a heating element which is in contact with an ink in a recording head, in response to a recording signal, to heat the ink thereby creating bubbles in the ink and thus ejecting ink droplets from the head so that recording is effected with the ink droplets. The ink is a liquid having a property such that its viscosity changes abruptly when heated and the heating element generates heat so that the average heat flux q.sub.o from the surface of the heating element to the ink satisfies the condition represented by the following formula: ##EQU1## where .kappa. denotes the coefficient of thermal conductivity of the ink, S the effective area of the heating element, V the volume of ink droplets ejected by one driving operation, T.sub.B the temperature of the ink at which bubbles are created in the ink, T.sub.o the temperature of the ink before the ink is ejected, T.sub.P the transition temperature of the ink at which the abrupt change in the viscosity occurs, and a the correction factor 1.5.

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Croucher, et al., "Design Criteria and Future Directions in Inkjet Ink Technology," Ind. Eng. Chem. Res., vol. 28, No. 11, pp. 1712-1718 (1989).

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