Doctor process of toner layer in non-magnetic single-component development system in electrophotography

Hiroyuki Kawamoto, Tomohiko Sugiyama, Wataru Furuichi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    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
    Title of host publicationInternational Conference on Digital Printing Technologies
    Pages213-215
    Number of pages3
    Publication statusPublished - 2010
    Event26th International Conference on Digital Printing Technologies, NIP26 and 6th International Conference on Digital Fabrication 2010, DF 2010 - Austin, TX
    Duration: 2010 Sep 192010 Sep 23

    Other

    Other26th International Conference on Digital Printing Technologies, NIP26 and 6th International Conference on Digital Fabrication 2010, DF 2010
    CityAustin, TX
    Period10/9/1910/9/23

    ASJC Scopus subject areas

    • Media Technology
    • Computer Science Applications

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  • Cite this

    Kawamoto, H., Sugiyama, T., & Furuichi, W. (2010). Doctor process of toner layer in non-magnetic single-component development system in electrophotography. In International Conference on Digital Printing Technologies (pp. 213-215)