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Electrostatic Inkjet Phenomena in Pin-to-Plate Discharge System

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A preliminary investigation was conducted on electrostatic inkjet phenomena. High voltage was applied between an insulative capillary tube filled with ion-conductive water and a metal plate electrode. Inkjet phenomenon was observed at the dark discharge under conditions of appropriate voltage application and water level. Although the electrostatic attractive Coulomb force is small, in the order of 10 μN at the voltage lower than the corona onset, it is large enough to separate a water drop against surface tension to the capillary tube at certain conditions. The diameter of the drop was about one millimeter. At the beginning of corona discharge, however, water mist was dispersed at wide angle from the tip of the tube due to the Coulomb repulsive force of charged mist. When the applied voltage was further increased, water mist became to be dispersed like spray, because the ionic wind prevented the separation and spread of the droplet. Application of adjusted pulse voltage can form a droplet of which formation is synchronized with the pulse. The diameter of the droplet depended on the applied voltage and the tube diameter. The droplet volume was in the order of several hundred picoliters. Preliminary printing on a paper was also demonstrated. This phenomenon is expected to be utilized for a new inkjet print head.
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Document Type: Research Article

Publication date: 2003-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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