Abstract: For providing a optical disk driving device that is capable of accurately performing recording and reproduction also of disks including warpage without the provision of a tilt mechanism, a clamper is comprised of a central clamper portion for pinching and holding a disk with a turntable, and an outer clamper portion for abutting against an outer periphery of the disk and pressurizing the same in case the disk includes any warpage to thereby correct the warpage, if present, through pressurizing; it is accordingly possible to restrict an angle formed between a light beam and an information surface of the disk to be within a specified value for accurately performing reproduction.

Abstract: A roller is equipped with an elastic layer comprising a foam, wherein at least a part of the elastic layer is subjected to permanent compressional deformation by heating compression, and the cells in the elastic layer subjected to permanent compressional deformation by heating compression outnumber the cells therein before the heating compression; and a process for producing the above roller in high efficiency. The above process enables the production of the roller in which the surface state of only an arbitrary portion thereof is modified according to the purpose of use, and the roller thus obtained can exhibit high performances in a variety of applications including paper feed roller, developer conveying roller and so forth.

Abstract: A mounting system that is capable of effectively draining the rainwater off the roof, while enabling easy installation of the solar battery modules. The mounting system is adapted to install on the roof an array of the solar battery modules each of a panel-like configuration with a rectangular frame. The system includes a plurality of vertical rails which are secured to the roof and extend along a roof sloping direction towards eaves from a ridge of the roof for holding the solar battery modules between a laterally spaced pair of the vertical rails in a spaced relation from a roof sheathing. Each of the vertical rails is formed on opposite sides thereof respectively with stepped shoulders which extend the full length of the vertical rail for supporting thereon the frame of the laterally adjoining solar battery modules.

Abstract: A roller is equipped with an elastic layer comprising a foam, wherein at least a part of the elastic layer is subjected to permanent compressional deformation by heating compression, and the cells in the elastic layer subjected to permanent compressional deformation by heating compression outnumber the cells therein before the heating compression; and a process for producing the above roller in high efficiency. The above process enables the production of the roller in which the surface state of only an arbitrary portion thereof is modified according to the purpose of use, and the roller thus obtained can exhibit high performances in a variety of applications including paper feed roller, developer conveying roller and so forth.