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Proceedings Paper

Surface tension effects in bubble-jet printing
Author(s): Joachim Patzer; Joachim Fuchs; Eberhard P. Hofer
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Paper Abstract

Although bubble-jet printers have gained a high market share there are still open questions left for fully understanding the various physical phenomena of the processes in ink jet firing chambers. Surface tension effects play a key role in this context. For example, these effects strongly influence the formation of the bubble at its growth and collapse and the refilling of the firing chamber. In this paper an improved model approach in combination with a new measurement technique to study surface tension effects for bubble-jet printheads is presented. Main attention is directed towards the simulation of the flow in the chamber and the droplet formation including surface tension effects. The model calculations have been carried out for a commercially available printhead. In order to support the simulation results a new class of measurements have been developed, namely, measurements under closed-pool conditions. This enables the examination of the growth of the vapor bubble under real conditions in side-view. The basic idea for preparation of the firing chamber is presented. It is shown that the new measurement technique does not affect the physical processes in the firing chamber and, consequently, the results can be compared with the simulations directly.

Paper Details

Date Published: 27 April 1995
PDF: 9 pages
Proc. SPIE 2413, Color Hard Copy and Graphic Arts IV, (27 April 1995); doi: 10.1117/12.207574
Show Author Affiliations
Joachim Patzer, Univ. Ulm (Germany)
Joachim Fuchs, Univ. Ulm (Germany)
Eberhard P. Hofer, Univ. Ulm (Germany)

Published in SPIE Proceedings Vol. 2413:
Color Hard Copy and Graphic Arts IV
Jan Bares, Editor(s)

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