Abstract: A process for producing polyacrylonitrile-base precursor fibers for production of carbon fibers, which comprises spinning a spinning dope containing 10 to 25 wt % of a polyacrylonitrile-base polymer having an intrinsic viscosity of 2.0 to 10.0 by extruding the spinning dope from a spinneret by a wet spinning or a dry wet spinning method, drying and heat-treating fibers obtained by the spinning, and then steam drawing the resulting fibers, wherein the linear extrusion rate of the polyacrylonitrile-base polymer from the spinneret is 2 to 15 m/min. Carbon fibers which are produced by stabilizing-carbonizing treatment of the polyacrylonitrile-base precursor fibers and which have a strand tensile modulus of 320 to 380 GPa and a conduction electron density of 3.0×1019 to 7.0×1019 spins/g as determined by electron spin resonance.

Abstract: To provide a thin film balun that can improve balance characteristics while maintaining miniaturization. In a thin film balun to which an embodiment relates, an auxiliary coil portion is disposed at a predetermined position so as to face any one of an unbalanced transmission line and a balanced transmission line.

Abstract: The present invention provides a thin film balun includes: an unbalanced transmission line 2 including a first coil portion C1 and a second coil portion C2; a balanced transmission line 3 including a third coil portion C3 and a fourth coil portion C4 that are magnetically coupled to the first coil portion C1 and the second coil portion C2, respectively; a first balanced terminal T1 connected to the third coil portion C3; a second balanced terminal T2 connected to the fourth coil portion C4; and an auxiliary coil portion C5 provided between the third coil portion C3 and the first balanced terminal T1 and/or between the fourth coil portion C4 and the second balanced terminal T2.

Abstract: The present invention provides a thin film balun according to an embodiment of the present invention includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a first electrode which is connected to the balanced transmission line and constitutes a capacitor 4; and a second electrode 51 which is connected to a ground terminal 72 and disposed to be opposed to the first electrode and constitutes the capacitor 4. The second electrode 51 has a section opposed to the coils configuring the unbalanced transmission line or the balanced transmission line, the section being integrally formed with a section opposed to the first electrode.

Abstract: The present invention provides a thin film balun according to an embodiment of the present invention includes: an unbalanced transmission line which includes two coils; a balanced transmission line which includes two coils and is electromagnetically coupled to the unbalanced transmission line; a capacitor having one end connected to the balanced transmission line; and a ground terminal 72 connected to the other end of the capacitor. The capacitor 4 is disposed in a region which does not overlap a coil included in the unbalanced transmission line and a coil included in the balanced transmission line.

Abstract: In a sheet stacking apparatus, a pair of side members includes a pair of lower side members which is provided with an approximately same distance therebetween as a width of a planographic printing plate and limits a movement in the planographic printing plate width direction; and a pair of upper side members which are provided above the pair of lower side members, each of which is provided with a movable section movable in the planographic printing plate width direction, and on which tapered surfaces are formed facing each other in a generally V shape. The distance between the pair of upper side members is controlled by driving the movable sections of the pair of upper side members so as to prevent quality degradation caused by a thrown-in sheet scratching a stacked sheet.

Abstract: A polyacrylonitrile-based polymer, containing a polymer of which main component is acrylonitrile, which satisfies at least one kind requirement selected from the following [a] to [d]. [a] Z-average molecular weight (Mz) determined by gel-permeation chromatograph is 800,000 to 6,000,000 and degree of polydispersity (Mz/Mw) (Mw denotes weight average molecular weight) is 3.0 to 10.0. [b] Z+1-average molecular weight (Mz+1) determined by GPC method is 3,000,000 to 10,000,000 and degree of polydispersity (Mz+1/Mw) is 6.0 to 25.0. [c] Mzm determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 400,000 to 1,000,000 and degree of polydispersity (Mzm/Mwm) is 3.0 to 10.0. [d] Z-average radius of gyration (Rz) determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 25 to 45 nm and its ratio to weight average radius of gyration (Rz/Rw) is 1.3 to 2.5.

Abstract: A polygon scanner including a polygon mirror, a bearing, a polygon motor, and a scanner board is mounted in an optical housing. A scanner-unit attachment portion to which the polygon scanner is attached is formed as a convex portion protruded from a bottom plate of the optical housing such that at least a planar shape of the polygon mirror is surrounded by the convex portion. The scanner board makes a tight contact with an upper surface of the convex portion in direct contact with each other, so that a bottom of the polygon scanner is covered by the convex portion and the bottom plate of the optical housing in a sealed manner.

Abstract: There is provided a thin film balun which, while incorporating a capacitor used to supply a DC bias, allows improvement of various required characteristics. A thin film balun according to the present embodiment includes: an unbalanced transmission line which includes two coils 11 and 12; a balanced transmission line 3 which includes two coils 21 and 22 and which magnetically couples with the unbalanced transmission line; a capacitor 4 having one end connected to the balanced transmission line 3; and a ground terminal 72 connected to the other end of the capacitor 4. The capacitor 4 is disposed to have a region which does not overlap a part of coil openings C1 and C2 defined by the coils 11 and 12 and the coils 21 and 22.

Abstract: A cleaning pad is provided that is disposable into a toilet after cleaning. Also provided is a laminated body of cleaning pads, and a cleaning tool that holds the cleaning pad or the laminated body of cleaning pads. A cleaning pad is formed in such a manner that an intermediate layer containing water-degradable pulp is interposed between two layers of water-degradable nonwoven fabric or water-soluble pulp paper, and the cleaning pad comprises a cleaning composition. A laminated body of cleaning pads is provided by forming cleaning pads in layers, and a cleaning tool holds the cleaning pad or the laminated body of cleaning pads.

Abstract: In a sheet stacking apparatus, a pair of side members includes a pair of lower side members which is provided with an approximately same distance therebetween as a width of a planographic printing plate and limits a movement in the planographic printing plate width direction; and a pair of upper side members which are provided above the pair of lower side members, each of which is provided with a movable section movable in the planographic printing plate width direction, and on which tapered surfaces are formed facing each other in a generally V shape. The distance between the pair of upper side members is controlled by driving the movable sections of the pair of upper side members so as to prevent quality degradation caused by a thrown-in sheet scratching a stacked sheet.

Abstract: An optical deflector, a method of producing the optical deflector, an optical scanning device, and an image forming apparatus are disclosed that are able to save resources, provide high reliability at low cost, and enable stacked and relatively-offset polygon mirrors to be arranged precisely. The optical deflector includes a rotary member supported by a bearing with plural polygon mirrors fixed thereon. The polygon mirrors are stacked along a rotation axis of the rotary member, the polygon mirrors are relatively offset by a predetermined angle in a rotation plane of the rotary member, and an effective deflection area of each of the reflection surfaces of any one of the polygon mirrors is positioned away from a center of the corresponding reflection surfaces of the other one of the polygon mirrors in the direction of the rotation axis.

Abstract: A carbon fiber tow composed of many carbon filaments and having a strand tensile strength of 3.8 to 5.5 GPa, a strand tensile modulus of 180 to 220 GPa and a carbon crystal size (Lc) of 13 to 18 ?. This carbon fiber tow can be produced by subjecting a precursor fiber tow composed of many polyacrylonitrile filaments which have a lightness difference (?L) of 50 or below and fineness of 1.1 to 1.7 dtex to oxidative stabilization and subjecting the stabilized fiber tow to carbonization with the maximum temperature within the range of 1,100 to 1,300° C. in an inert atmosphere while raising the temperature from 1,000° C. to the maximum temperature at a temperature rise rate of 100 to 2,000° C./min.

Abstract: An optical deflector, a method of producing the optical deflector, an optical scanning device, and an image forming apparatus are disclosed that are able to save resources, provide high reliability at low cost, and enable stacked and relatively-offset polygon mirrors to be arranged precisely. The optical deflector includes a rotary member supported by a bearing with plural polygon mirrors fixed thereon. The polygon mirrors are stacked along a rotation axis of the rotary member, the polygon mirrors are relatively offset by a predetermined angle in a rotation plane of the rotary member, and an effective deflection area of each of the reflection surfaces of any one of the polygon mirrors is positioned away from a center of the corresponding reflection surfaces of the other one of the polygon mirrors in the direction of the rotation axis.

Abstract: A cleaning pad is provided that is disposable into a toilet after cleaning. Also provided is a laminated body of cleaning pads, and a cleaning tool that holds the cleaning pad or the laminated body of cleaning pads. A cleaning pad is formed in such a manner that an intermediate layer containing water-degradable pulp is interposed between two layers of water-degradable nonwoven fabric or water-soluble pulp paper, and the cleaning pad comprises a cleaning composition. A laminated body of cleaning pads is provided by forming cleaning pads in layers, and a cleaning tool holds the cleaning pad or the laminated body of cleaning pads.

Abstract: A hydrodynamic bearing unit is provided, by which the touch between oil and a sealing member in a housing is prevented to prevent oil leakage. A bearing member made of a sintered lubricant-containing metal is disposed along the inner periphery of the housing and a spindle is supported in a non-contact manner by the hydrodynamic oil pressure that is generated in a bearing gap by the rotation of the spindle. The opening of the housing is sealed by the sealing member. A ventilation path is formed so as to communicate a sealed space enclosed by the distal end of the spindle at the bottom of the housing, the bearing member and the housing with open air. An oil reservoir is formed between the inner periphery of the housing and the outer periphery of the bearing member at the end portion of the opening side of the housing. The oil reservoir is made so as to communicate with the ventilation path.

Abstract: A separable tow of elongated polymeric filaments comprises a plurality of distinct sub-tows lightly and individually and separably joined, as by light crimping together along their edges or, if uncrimped, joined by presence of moisture, and capable of being packed into a container and later removed and separated. The filaments are preferably acrylic and have a total fineness of about 300,00-1,500,000 denier and the sub-tows each of which has a total fineness of about 50,000-250,000 denier, with a filament fineness of about 1-2 denier, and each sub-tow has a degree of entanglement of about 10-40 m−1 as measured by the hook drop test. The separable tow is made of a plurality of sub-tows, after separately drawing the sub-tows and subsequently removably joining the sub-tows into a single tow.

Abstract: A continuous precursor fiber bundle for manufacture of carbon fibers comprising a plurality of precursor fiber bundles each of which comprises at least 30,000 filaments, having a joined portion formed by joining at the terminal end of one of the precursor fiber bundles and the starting end of another one of the fiber bundles directly or through an intervening fiber bundle comprising a plurality of filaments, wherein the individual filaments at the joined portion are substantially uniformly interlaced with each other and wherein the interlacing of filaments is in a pattern selected from the group consisting of continuous substantially uniform interlacing in the transverse direction of said fiber bundles, interlacing at many joints on the joining portion, and interlacing of the entire face of said joining portion.

Abstract: An electrically conducting curable resin composition containing (A) a vinyl ester resin, (B) at least one monomer selected from an allyl ester monomer, an acrylic acid ester monomer or a methacrylic acid ester monomer, (C) a radical polymerization initiator and (D) at least 40% by mass of a carbonaceous filler, and a cured product thereof are disclosed. The electrically conducting curable resin composition and cured product thereof not only have high electrical conductivity, but also excellent heat radiation property, high heat resistance and good corrosion resistance, and therefore are suitable for use as a highly electrically conducting material such as separator for fuel cells.

Abstract: A hydrodynamic bearing unit is provided, by which the touch between oil and a sealing member in a housing is prevented to prevent oil leakage. A bearing member made of a sintered lubricant-containing metal is disposed along the inner periphery of the housing and a spindle is supported in a non-contact manner by the hydrodynamic oil pressure that is generated in a bearing gap by the rotation of the spindle. The opening of the housing is sealed by the sealing member. A ventilation path is formed so as to communicate a sealed space enclosed by the distal end of the spindle at the bottom of the housing, the bearing member and the housing with open air. An oil reservoir is formed between the inner periphery of the housing and the outer periphery of the bearing member at the end portion of the opening side of the housing. The oil reservoir is made so as to communicate with the ventilation path.