Patents by Inventor Yeong-sik Mun

Yeong-sik Mun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of preparing poly-silicic-ferric coagulant (PSFC) for electrostatic charge image developing toner
    Patent number: 9921508
    Abstract: Provided is a method of preparing a poly-silicic-ferric coagulant (PSFC) having a controlled aggregating strength. In particular, according to an embodiment, provided is a method of preparing a PSFC that may effectively suppress both formation of fine toner particles having a particle size that is smaller than a desired particle size and formation of coarse toner particles having a particle size that is greater than the desired particle size, wherein the PSFC for a toner is used in preparation of a toner by using an emulsion aggregation (EA) method. The PSFC for a toner prepared by using the method, according to an embodiment, significantly exhibits a controlled aggregating strength, and thus a viscosity of an emulsion aggregation solution for the toner preparation is appropriate, which results in suppressing production of fine toner particles and coarse toner particles. In this regard, a toner preparation yield may improve.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 20, 2018
    Assignee: S-PRINTING SOLUTION CO., LTD.
    Inventors: Sung-hwa Lee, Il-hyuk Kim, Yeong-sik Mun
  • METHOD OF PREPARING POLY-SILICIC-FERRIC COAGULANT (PSFC) FOR ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER
    Publication number: 20170031256
    Abstract: Provided is a method of preparing a poly-silicic-ferric coagulant (PSFC) having a controlled aggregating strength. In particular, according to an embodiment, provided is a method of preparing a PSFC that may effectively suppress both formation of fine toner particles having a particle size that is smaller than a desired particle size and formation of coarse toner particles having a particle size that is greater than the desired particle size, wherein the PSFC for a toner is used in preparation of a toner by using an emulsion aggregation (EA) method. The PSFC for a toner prepared by using the method, according to an embodiment, significantly exhibits a controlled aggregating strength, and thus a viscosity of an emulsion aggregation solution for the toner preparation is appropriate, which results in suppressing production of fine toner particles and coarse toner particles. In this regard, a toner preparation yield may improve.
    Type: Application
    Filed: March 30, 2016
    Publication date: February 2, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-hwa LEE, II-hyuk Kim, Yeong-sik Mun