Abstract: A heat-sensitive stencil including a thermoplastic resin film on which a porous resin layer and a porous reinforcing layer are formed in succession. A porous fibrous layer may be disposed between the porous resin layer and the porous reinforcing layer.

Abstract: A tissue paper used for heat sensitive stencil sheet to be used for a heat-sensitive stencil sheet comprising natural fibers, synthetic fibers, or their mixture, which being impregnated with an ionizing radiation curable type of resin, and a heat-sensitive stencil sheet having a thermoplastic resin film being bonded thereto, wherein, at surface of one side of the resin film, there is provided the tissue paper used for heat-sensitive stencil sheet, which is that being bonded the thermoplastic resin film by point-bonding with using an ionizing radiation-curable resin, and there is provided an anti-sticking layer on the other side of the thermoplastic resin film.

Abstract: An optical deflector for deflecting a laser beam from a laser by rotating a polygon mirror uses a dynamic pressure pneumatic bearing as a radial bearing and a magnetic bearing as a thrust bearing. The deflector includes a hollow rotor rotatable integrally with the mirror, a stationary shaft received in said hollow rotor, a casing member accommodating the rotor and stationary shaft, and an annular rotor magnet assembly mounted on the outer periphery of the rotor. A first rotary magnet is mounted in an upper end portion of a rotary shaft and a first stationary magnet in an upper end portion of the stationary shaft in such a manner as to face each other with the same polarity, a repulsive force acting between the two magnets serving as a thrust magnetic bearing. A second stationary magnet is arranged to face the first rotary magnet with the same polarity.