Dynamics of toner and carrier particles in two-component development system used in electrophotography

Hiroyuki Kawamoto, Satoshi Lesaka

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

    Abstract

    We have studied the dynamics of toner and carrier particles in a two-component development system used for electrophotography in order to improve the image defect due to the bead-carry-out (BCO) phenomenon. We have manufactured a mock-up apparatus consisting of a pseudo-photoreceptor drum, development sleeve, and stationary magnetic roller. We have measured the number density of carrier particles adhered to the photoreceptor surface after the development process and have observed the behavior of the toner and carrier particles using a high-speed color microscope camera. It has been confirmed that the number density of the adhered carrier particles increases when the DC development voltage is high, toner concentration is low, and speed ratio of the development sleeve to photoreceptor drum is low. It has been observed that depletion of toner particles from the tips of carrier chains occurs in the post-nip region of the development area. It is assumed that when the initial toner concentration is lower than the threshold value, 6 wt%, insulative toner particles do not affect the electrical conduction of the conductive carrier chains, and therefore, the electrical charge at the top of the chains, which is induced by the applied voltage, increases. This increase in the electrical charge causes an increase in the Coulomb force applied to the top of the chains, and the BCO phenomenon occurs. On the other hand, when the speed of the development sleeve is low, the number of toner particles developed on the latent image is not sufficient to neutralize the surface potential of the latent image. The effective voltage between the sleeve and photoreceptor drum is not sufficiently reduced in this case, and thus, the BCO phenomenon occurs.

    Original languageEnglish
    Title of host publicationInternational Conference on Digital Printing Technologies
    Pages237-240
    Number of pages4
    Publication statusPublished - 2009
    EventNIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009 - Louisville, KY
    Duration: 2009 Sep 202009 Sep 24

    Other

    OtherNIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009
    CityLouisville, KY
    Period09/9/2009/9/24

    Fingerprint

    Electric potential
    Surface potential
    Microscopes
    Cameras
    Color
    Defects

    ASJC Scopus subject areas

    • Media Technology
    • Computer Science Applications

    Cite this

    Kawamoto, H., & Lesaka, S. (2009). Dynamics of toner and carrier particles in two-component development system used in electrophotography. In International Conference on Digital Printing Technologies (pp. 237-240)

    Dynamics of toner and carrier particles in two-component development system used in electrophotography. / Kawamoto, Hiroyuki; Lesaka, Satoshi.

    International Conference on Digital Printing Technologies. 2009. p. 237-240.

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

    Kawamoto, H & Lesaka, S 2009, Dynamics of toner and carrier particles in two-component development system used in electrophotography. in International Conference on Digital Printing Technologies. pp. 237-240, NIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009, Louisville, KY, 09/9/20.
    Kawamoto H, Lesaka S. Dynamics of toner and carrier particles in two-component development system used in electrophotography. In International Conference on Digital Printing Technologies. 2009. p. 237-240
    Kawamoto, Hiroyuki ; Lesaka, Satoshi. / Dynamics of toner and carrier particles in two-component development system used in electrophotography. International Conference on Digital Printing Technologies. 2009. pp. 237-240
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