Patents by Inventor Tsuneaki Kondoh

Tsuneaki Kondoh 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).

  • Fixing member, method for producing it, and image forming apparatus comprising the fixing member
    Patent number: 6911240
    Abstract: In a fixing member (10) in which an elastic layer made of heat-resistance synthetic rubber and a releasing layer made of fluorocarbon resin are sequentially provided on a substrate, a melting point of the fluorocarbon resin constituting the releasing layer (3) is set to be at least 20° C. lower than a temperature for starting an oxidation of the heat-resistance synthetic rubber constituting the elastic layer (2), and the releasing layer (3) is baked at a temperature which is higher than the melting point of the fluorocarbon resin constituting the releasing layer (3), and a baking temperature which does not exceed the starting temperature for the oxidation of the heat-resistance rubber constituting the elastic layer (2).
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: June 28, 2005
    Assignee: Ricoh Company, Ltd.
    Inventor: Tsuneaki Kondoh
  • Fixing member, method for producing it, and image forming apparatus comprising the fixing member
    Publication number: 20050095381
    Abstract: In a fixing member (10) in which an elastic layer made of heat-resistance synthetic rubber and a releasing layer made of fluorocarbon resin are sequentially provided on a substrate, a melting point of the fluorocarbon resin constituting the releasing layer (3) is set to be at least 20° C. lower than a temperature for starting an oxidation of the heat-resistance synthetic rubber constituting the elastic layer (2), and the releasing layer (3) is burned by a temperature which is higher than the melting point of the fluorocarbon resin constituting the releasing layer (3), and a burning temperature which does not exceed the starting temperature for the oxidation of the heat-resistance rubber constituting the elastic layer (2).
    Type: Application
    Filed: November 19, 2004
    Publication date: May 5, 2005
    Inventor: Tsuneaki Kondoh
  • Fixing member and image forming apparatus using the same
    Publication number: 20040224165
    Abstract: In a fixing member (10) having an elastic layer (2) of heat resistance rubber provided on a substrate 1 and a separation layer (3) of fluorocarbon resin provided on the elastic layer, the fluorocarbon resin is that a tensile strength of a 30 &mgr;m coating film burned at 340° C. is equal or greater than 25 MPa. The heat resistance rubber includes, for example, silicone rubber or fluorosilicone rubber as a major component. The fluorocarbon resin includes PFA as a major component, for example.
    Type: Application
    Filed: February 24, 2004
    Publication date: November 11, 2004
    Inventors: Tsuneaki Kondoh, Kyoichi Ashikawa, Takuzo Kurachi, Norihiko Aze, Kohji Kamiya, Takayuki Yoshii, Nozomu Takahata, Atsushi Ishibe, Hidenori Machida
  • Fixing member, method for producing it, and image forming apparatus comprising the fixing member
    Publication number: 20040069404
    Abstract: In a fixing member (10) in which an elastic layer made of heat-resistance synthetic rubber and a releasing layer made of fluorocarbon resin are sequentially provided on a substrate, a melting point of the fluorocarbon resin constituting the releasing layer (3) is set to be at least 20° C. lower than a temperature for starting an oxidation of the heat-resistance synthetic rubber constituting the elastic layer (2), and the releasing layer (3) is burned by a temperature which is higher than the melting point of the fluorocarbon resin constituting the releasing layer (3), and a burning temperature which does not exceed the starting temperature for the oxidation of the heat-resistance rubber constituting the elastic layer (2).
    Type: Application
    Filed: August 13, 2003
    Publication date: April 15, 2004
    Inventor: Tsuneaki Kondoh