Abstract: A balance correcting method, a dynamic pressure bearing, and an optical scanning apparatus. For balance correction a method of attaching weight to the rotatable body and another method of partly removing the rotatable body are jointly used. At the time of a first balance correcting process step, a balance correction is performed by applying adhesive agent to a recess portion formed on a circular circumference of a polygon mirror or a recess portion constructed with a rotor flange. At the time of a second balance correcting process step, the polygon mirror is partly removed or the rotor flange is partly removed. The method can be applied to a dynamic pressure bearing capable of stabilizing a rotation balance and an optical scanning apparatus having a structure capable of not changing the direction of the reflection surface of the rotatable polygon mirror. The rotating shaft is supported in the radial direction by sucking air existing between the fixing shaft and the rotating shaft.

Abstract: A carbon black is provided which is useful as an electrocatalyst carrier. The carbon black has a DBP oil absorption of 170 to 300 cm3/100 g, a specific surface area as measured by a BET method of 250 to 400 m2/g, a primary particle diameter value of 10 to 17 nm, and a total volume of open pores at the surface which have a pore radius of 10 to 30 nm of 0.40 to 2.0 cm3/g. The electrocatalyst can be used in electrochemical devices such as solid polymer electrolyte fuel cells.

Abstract: A separator for fuel cells is efficiently mass-produced by heating and compression-molding a raw material mixture of a carbonaceous powder and a binder while reducing the residence time in a compression-molding machine without impairing the quality or functions of the separator to be obtained. In this process for producing a fuel cell separator, the raw material mixture of a carbonaceous powder and a binder is heated in a heating oven, subsequently introduced into a compression-molding machine, and then compression-molded therein.

Abstract: A lubrication apparatus lubricates a feed mechanism of a molding machine. The lubrication apparatus includes a storage member for storing lubrication oil therein, and a lubrication oil circulation pipe connected to the storage member.

Abstract: A conductive carbonaceous-fiber sheet has a thickness of from 0.05 to 1 mm, a weight per a unit area of from 60 to 250 g/m2, a bending resistance (L) as determined by the 45° Cantilever method of 6 cm or higher and an in-plane volume resistivity of 0.2 &OHgr;cm or lower, and is suitable for use as a gas diffusion layer in a solid polymer electrolyte fuel cell.

Abstract: A card connector 1, which is constructed with a main body 11, a flap member 21, a plurality of first contacts 31 and a plurality of second contacts 32, comprises a first connector section 10 and a second connector section 20. The first connector section 10 allows removable insertion of a first card-like memory module 51 through a insertion opening 12 into a slot-like receiving part provided at the lower part of the main body 11 for electrical connection through the first contacts 31, which are aligned and retained in the receiving part. The second connector section 20 allows removable installation of a second card-like memory module 52 for electrical connection through the second contacts 32, which are aligned and retained on the main body above the receiving part, with the flap member 21 being mounted on the upper part of the main body 11 pivotally to be opened and closed for installation of the second card-like memory module 52.

Abstract: An image forming apparatus with a DC brushless motor including a permanent magnet having n magnetized poles, where n is an even number, a rotatably held rotor on which the permanent magnet is fixed, a stator core having T-shaped pole shoes corresponding to the magnetic poles of the permanent magnet, windings fixed on the stator core and including a plurality of phases for selectively generating magnetic polarities in sequence, a driver circuit for switching conduction to the windings, and a rotating position detector for detecting a rotating position of the permanent magnet. The windings are divided into a plurality of winding groups for generating magnetic polarities in a plurality of the windings so as to produce a magnetic repellent force or a magnetic attractive force between all the magnetic poles of the permanent magnet and T-shaped pole shoes of the stator core associated with selected phases by the driver circuit based on a rotating position detected by the rotating position detector.

Abstract: A polygonal scanner of the present invention includes a rotary body including a ceramic rotary sleeve and a metallic cylindrical member shrinkage-fitted on the rotary sleeve. The cylindrical member is formed with mirror surfaces constituting a polygonal mirror. A dynamic pressure, air bearing supports the rotary body. The mirror surfaces overlap the rotary sleeve in the axial direction of the rotary sleeve. A hole greater in diameter than the dynamic pressure, air bearing is formed in the top wall of the cylindrical member. The cylindrical member includes a stress removing portion positioned between the mirror surfaces and the rotary sleeve for removing a stress ascribable to shrinkage-fitting.

Abstract: An EMI suppression apparatus allowing a common mode radiant noise energy to be reduced without attenuating a normal mode signal level is disclosed. A communication LSI has an earth terminal connected to the housing via a common mode impedance. A Common mode choke composed of two coils having a mutual inductance is provided in the housing. One coil connects a signal terminal of the communication LSI to a signal transmission wire. The other coil connects the earth terminal of the communication LSI to the quasi-ground surface of the housing. The common mode chokes causes a common mode radiant noise generated by the common mode impedance to be removed from the signal transmission wire without affecting a normal mode signal flowing through the signal transmission wire.

Abstract: An electronic-part inspection device 20 comprises a plurality of terminals 30, a left terminal-retaining member 51 and a left swinging member 71, and each terminal 30 comprises a terminal base portion 31, a swinging arm portion 33, a contact portion 35 and an engaging portion 37. The terminal base portion 31 is located in the lower part of the terminal 30 and retained in the left terminal-retaining member 51, and the swinging arm portion 33 extends upward from the terminal base portion 31 and is capable of undergoing elastic deformation to swing back and forth. The contact portion 35 is located at the upper end of the swinging arm portion 33, and the engaging portion 37 is also located at the upper end of the swinging arm portion 33. The left terminal-retaining member 51 comprises base-receiving portions 58, which retain the terminal base portions 31 of the terminals 30, and a counter surface 63a provided on a middle wall 63 that exists in the base-receiving portions 58.

Abstract: A card connector 1, which is constructed with a main body 11, a flap member 21, a plurality of first contacts 31 and a plurality of second contacts 32, comprises a first connector section 10 and a second connector section 20. The first connector section 10 allows removable insertion of a first card-like memory module 51 through a insertion opening 12 into a slot-like receiving part provided at the lower part of the main body 11 for electrical connection through the first contacts 31, which are aligned and retained in the receiving part. The second connector section 20 allows removable installation of a second card-like memory module 52 for electrical connection through the second contacts 32, which are aligned and retained on the main body above the receiving part, with the flap member 21 being mounted on the upper part of the main body 11 pivotally to be opened and closed for installation of the second card-like memory module 52.

Abstract: A corrosion-resistant article of a magnesium material having the gloss of the metal substrate surface comprises an anodic oxide film formed on the external surface of an article of magnesium or a magnesium alloy, which never changes the gloss of the metal substrate and a colorless or colored transparent electrodeposition coating film on the anodic film. Such an article can be prepared by immersing an article of magnesium or a magnesium alloy in an electrolyte containing a phosphate and an aluminate to thus form an anodic oxide film through anodization of the surface of the article and forming a colorless or colored transparent electrodeposition coating film on the anodic film through electrodeposition coating.

Abstract: In a printed wiring board, slotted portions are provided in a grounding layer so as to be positioned under communication lines print-wired on a printed wiring board. Capacitors are provided between the slotted portions and external connecting terminals. Two units of oppositely directed magnetic flux of an equal level occur for the slotted portions by common mode currents flowing in the communication lines. These two units of magnetic flux offset each other to lower a common mode noise level.

Abstract: A direct-current (DC) brushless motor is provided for realizing an easy winding operation, a flat shape, effective utilization of a magnetic force, improved magnetic characteristics of a stator core, and a good rotation driving efficiency particularly at a higher rotational speed region. The DC brushless motor switches conduction to windings wound around a stator core fixedly disposed corresponding to a rotatable rotor on which a permanent magnet is fixed, to generate a rotating magnetic field which causes the rotor to rotate.

Abstract: A direct-current (DC) brushless motor is provided for realizing an easy winding operation, a flat shape, effective utilization of a magnetic force, improved magnetic characteristics of a stator core, and a good rotation driving efficiency particularly at a higher rotational speed region. The DC brushless motor switches conduction to windings wound around a stator core fixedly disposed corresponding to a rotatable rotor on which a permanent magnet is fixed, to generate a rotating magnetic field which causes the rotor to rotate.

Abstract: To provide a method of pseudogrounding which is capable of protecting against EMI by pseudogrounding communication lines, etc. without necessity of expensive ferrite cores and increasing the number of steps and cost. A wiring which is connected to an LSI (43) on a package and is connected to an external wiring (47) via a connector (461), radio-frequency connected via a capacitance (451, 452) to ta housing (42) in which protection against EMI is achieved so that the radiated noise energy is not higher than EMI restricted value level. This enables said wiring to be pseudogrounded.

Abstract: A high tensile strength copper foil having a matte side roughness Rz of 2.5 &mgr;m or less and a tensile strength of 40,000 Kgf/mm2 after heating one hour at 180° C. is produced by a process in which copper is electrodeposited from a solution containing predetermined small amounts of a polyether glycol and tin and iron ions. The chloride ion content is maintained below 0.1 wt. ppm. The copper foil is characterized by having copper crystals with atomic cells having a predominently (111) orientation.

Abstract: Provided a color recording device for developing a color image with the use of liquid developer in which toner is dispersed, in which liquid developer having a high toner density is preferably used for printing a fine image, which however causes a problem of precipitation of toner or the like. Thus, at least four liquid type color developing units using liquid developer having a high toner density of 5 to 35% are arranged on a rotary base which is rotated so that the developing units are changed over so as to be respectively opposed to a recording medium, and each of the developing units is composed of a cartridge bottle in which the liquid developer is pooled, a supply passage for supplying the liquid developer pumped up from the cartridge bottle onto a pump-up roller for feeding the liquid developer pumped up onto a developing roller. The supply passage can supply a regulated quantity of the liquid developer in association with the rotation of the rotary base.

Abstract: A motor drive apparatus for driving a motor with power derived from a main power source, including a signal input device configured to input a start signal and a stop signal to initiate starting and stopping of the motor; a voltage regulator configured to output regulated electric power to the motor; and a semiconductor switching device disposed between the main power source and the voltage regulator, coupled to the signal input device, and configured to switch electric power from the main power source to the voltage regulator in accordance with the start signal input from the signal input device, and to shut off the electric power to the voltage regulator in accordance with the stop signal input from the signal input device.

Abstract: A carbon black having a ratio of a maximum absorbance in a range of 1800 to 1670 cm.sup.-1 to a maximum absorbance in a range of 1670 to 1500 cm.sup.-1 of not less than 0.65 on condition that a straight line interconnecting the absorbances at 1805 cm.sup.-1 and 900 cm.sup.-1 is taken as a base line in an absorbance chart of infrared absorption spectrum.