Abstract: The present invention provides an endless belt for an image forming apparatus having at least two layers of an inner layer and an outermost layer, in which the average regular reflectance of the surface of the outermost layer is 5.0% or more and the fluctuation of the regular reflectance of the surface of the outermost layer is kept within ±10%, and an image forming apparatus having the endless belt for an image forming apparatus.

Abstract: The present invention provides an endless belt for an image forming apparatus having at least two layers of an inner layer and an outermost layer, in which the average regular reflectance of the surface of the outermost layer is 5.0% or more and the fluctuation of the regular reflectance of the surface of the outermost layer is kept within ±10%, and an image forming apparatus having the endless belt for an image forming apparatus.

Abstract: A dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus including: a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and a capturing device for capturing the operating fluid leaked from the gap, the capturing device being disposed on an outside surface of the sleeve in the predetermined direction.

Abstract: A shaft integral with a rotary polygon mirror is fitted in a sleeve so as to be rotatable, and the bearing clearance is filled with a lubricant. The lubricant comprises a base oil comprising a mixed oil consisting of a plurality of components whose vapor pressures are equal or close to each other. Suitably combining components of different viscosities makes it possible to prepare the lubricant so as to have such a viscosity to match with the bearing characteristics. Selection of components having a little difference in vapor pressure prevents viscosity change due to volatilization of a specific component. Thus, the viscosity change of the lubricant in the bearing clearance is prevented.

Abstract: To provide a dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus of the present invention comprises; a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and capturing means for capturing the operating fluid leaked from the gap, the capturing means being disposed on an outside surface of the sleeve in the predetermined direction.

Abstract: A minutely working method of and apparatus for opposing the surface of a transfer member having a concave or convex pattern formed on the surface thereof and the surface of a workpiece to each other, heating the transfer member and thermally expanding the transfer member in the direction of a normal to the surface thereof to thereby transfer the concave or convex pattern to the workpiece.