Patents by Inventor Masayasu Hagi

Masayasu Hagi 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).

  • Toner and developer, toner container, process cartridge, image forming method and image forming apparatus
    Patent number: 7635549
    Abstract: A toner including a binder resin, a colorant and a release agent, and satisfying the following relationships (1) and (2): 1.0?FT120/FT160?1.5??(1) wherein FT120 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 120° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FT160 is same except that the substrate has a temperature of 160° C.; 1.0?FP100/FP200?1.5??(2) wherein FP100 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 160° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FP200 is same except that the pressure is 200 kPa.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: December 22, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Minoru Nakamura, Chiyoshi Nozaki, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Atsushi Yamamoto, Masayasu Hagi, Takuya Kadota, Hiroaki Katoh, Masahide Inoue
  • Toner and developer, toner container, process cartridge, image forming method and image forming apparatus
    Publication number: 20060210902
    Abstract: A toner including a binder resin, a colorant and a release agent, and satisfying the following relationships (1) and (2): 1.0?FT120/FT160?1.5??(1) wherein FT120 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 120° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FT160 is same except that the substrate has a temperature of 160° C.; 1.0?FP100/FP200?1.5??(2) wherein FP100 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 160° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FP200 is same except that the pressure is 200 kPa.
    Type: Application
    Filed: March 20, 2006
    Publication date: September 21, 2006
    Inventors: Minoru Nakamura, Chiyoshi Nozaki, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Atsushi Yamamoto, Masayasu Hagi, Takuya Kadota, Hiroaki Katoh, Masahide Inoue