Formation of charged toner layer and degradation of toner particles in doctoring process of electrophotographic non-magnetic single-component development system

Hiroyuki Kawamoto, Tomohiko Sugiyama, Wataru Furuichi

    Research output: Contribution to journalArticle

    Abstract

    In a non-magnetic single-component development system in electrophotography, formation of a thin and uniform toner layer on the development roller is important for obtaining high image quality. We conducted experimental and numerical investigations to clarify the dynamics of toner particles in this process. Two approaches were adopted for the investigation. One is experimental and the other is numerical simulation using the distinct element method. We manufactured a mock-up apparatus consisting of a supply roller, a development roller, and a doctor blade for forming a thin toner layer on the development roller. The thickness, surface roughness, and charge density of the formed toner layer were measured after the doctoring process. It was clarified that the thickness of the toner layer was increased, but the charge density was decreased, by increasing the applied voltage and rotational speed. These findings were confirmed by direct observation of the toner motion in the doctoring area with a high-speed microscope camera. Numerical calculations performed using an improved distinct element method revealed that the elastic energy applied to the toner particles, which is an index of toner degradation, was increased by increasing the stiffness and pressing force of the doctor blade, but decreased when the curvature of the blade tip was large. The present experimental and numerical results can be used to improve non-magnetic single-component development system in electrophotography.

    Original languageEnglish
    Pages (from-to)1235-1241
    Number of pages7
    JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
    Volume78
    Issue number788
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Business equipment
    • Doctoring process
    • Electrophotography
    • Information processing equipment
    • Mechatronics
    • Non-magnetic single-component development
    • Toner

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Industrial and Manufacturing Engineering

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