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Toner Charging Behavior in Mono-Component Developing Process

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Charging behavior of toner in the nonmagnetic mono-component developing process was examined experimentally. A developing unit, which consisted of a developing roller, a supply roller and a doctor blade, was fabricated, and charging characteristics of the toner layer on the developing roller surface was investigated. The influence of CCA contained in the toner on its charging was also studied. It was found that the toner particles were charged mainly when they passed the gap between the doctor blade and developing roller. Although a negative toner was used, some toner particles were charged positively. The fraction of wrong sign toner decreased from 22% to 8% by passing the doctor blade. SEM observation suggested that toner particles of small particle size passed the doctor blade more easily.

Document Type: Research Article

Publication date: January 1, 2001

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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