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Measurement of electric charges on flowing toner with an electrostatic voltmeter

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In every electrophotographic development system, the optimal charging and mass transfer processes are crucial for achieving high quality prints. Therefore, precise measurements of both charge and mass of toner become very important. This paper presents a novel method for measurements of the electric charge of the flowing electrophotographic toner particles. An electrostatic voltmeter (ESVM) is used for precise measurements of the voltage induced by charges carried by the flux of solid toner particles and by the charges generated on the walls of a dielectric pipe, while the toner is pneumatically transported through the pipe. Additionally, the total charge and mass of the toner are measured before and after passing through the pipe. In this way, voltages registered by the ESVM can be correlated with the amount of charge created by tribocharging. This allows for determination of tribocharging properties of the toner at a given particle flow velocity and for a given dielectric pipe material. The ESVM is a convenient, noncontacting, continuous, real-time charge monitoring tool.
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Document Type: Research Article

Publication date: 2004-01-01

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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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