Abstract: This invention provides a disc driving device used for rotationally driving a disc-shaped recording medium, comprising: a motor (3) in which a rotary shaft (2) attached to a rotor housed in a case (1) is provided to protrude from the case; and a turntable (4) having a setting portion (4d) for setting a disc (201) thereon and a cylindrical portion (4a) provided to protrude inward, and mounted on the proximal end side of the rotary shaft (2) so as to cover the proximal end side of the rotary shaft (2) by the cylindrical portion (4a).

Abstract: An apparatus for recording and/or reproducing a disc-shaped recording medium. A medium is placed on each of a plurality of placement members. The members are stacked and housed in a housing unit. An elevating mechanism elevates the housing unit in the direction almost parallel to the stack direction of the members. A carrying mechanism carries one of the members among a position where a medium can be placed or ejected to/from the member, a position where the member is housed in the housing unit and a position where the medium placed on the member is loaded to the recording and/or reproducing unit. A driving source drives both the carrying mechanism and the elevating mechanism. A switching mechanism selectively supplies a driving force from the driving source to the carrying mechanism and the elevating mechanism. A photodetector detects the presence/absence of the medium on the members in the housing unit.

Abstract: Disclosed is an adjustment apparatus for adjusting an optical pickup capable of recording and/or reproducing plural optical discs of different sorts. The adjustment apparatus is an optical disc for adjustment (1) having a first signal recording layer (5) having a physical format in common with a CD and a second signal recording layer (7) having a physical format in common with a DVD. On the first and second signal recording layers, there are concentrically recorded EFM modulated data. The respective signal recording layers are provided with recording areas (8), (9) not overlapped with each other.

Abstract: An apparatus for recording and/or reproducing a medium includes an elevating mechanism elevating a housing unit in which members are stacked and stored. A carrying mechanism carries at least one of the members between a position where the member is housed in the housing unit and a position where a medium on the member is loaded to a recording and/or reproducing unit. A driving source drives both the carrying mechanism and the elevating mechanism. A switching mechanism selectively supplies a driving force from the driving source to the carrying and elevating mechanisms. A rack part is formed in the member. The carrying mechanism includes a feed gear and an arm. The feed gear comes into engagement with the rack part and is rotatably attached to the arm. The switching mechanism swings the arm so that the feed gear is disengaged from the rack part when the elevating mechanism is driven.

Abstract: An apparatus for recording and/or reproducing a disc-shaped recording medium. A medium is placed on each of a plurality of placement members. The members are stacked and housed in a housing unit. An elevating mechanism elevates the housing unit in the direction almost parallel to the stack direction of the members. A carrying mechanism carries one of the members among a position where a medium can be placed or ejected to/from the member, a position where the member is housed in the housing unit and a position where the medium placed on the member is loaded to the recording and/or reproducing unit. A driving source drives both the carrying mechanism and the elevating mechanism. A switching mechanism selectively supplies a driving force from the driving source to the carrying mechanism and the elevating mechanism. A photodetector detects the presence/absence of the medium on the members housed in the housing unit.

Abstract: This device has an optical pickup section, a first rack portion provided on the optical pickup section, a slide member having an opening/closing portion for opening/closing a facing surface of the objective lens to the optical disc and a second rack portion provided to be slidable on the first rack portion, and a driving mechanism having a driving gear which meshes with the first rack portion and the second rack portion. In this device, when the optical pickup section is moved to a predetermined position, the meshing state of the first rack portion with the driving gear is canceled and the second rack portion is driven by the driving gear to move the slide member, thereby moving the opening/closing portion from a position for opening the facing surface side of the objective lens to a position for closing the facing surface side.

Abstract: To reduce the weight and size of the whole apparatus by decreasing the number of motors as driving sources and to reduce the manufacturing cost. The apparatus comprises: a plurality of disc trays each on which an optical disc is placed; a tray stocker in which the disc trays are stacked and housed; an elevating mechanism for elevating the tray stocker; an optical pickup device and a disc rotating mechanism for performing recording or reproduction; a tray carrying mechanism for moving a disc tray between a stock position and a play position; a driving motor for driving both the carrying mechanism and the elevating mechanism; and a switching mechanism for selectively supplying a driving force from the driving motor to the carrying mechanism and the elevating mechanism.

Abstract: To reduce the weight and size of the whole apparatus by decreasing the number of motors as driving sources and to reduce the manufacturing cost. The apparatus comprises: a plurality of disc trays each on which an optical disc is placed; a tray stocker in which the disc trays are stacked and housed; an elevating mechanism for elevating the tray stocker; an optical pickup device and a disc rotating mechanism for performing recording or reproduction; a tray carrying mechanism for moving a disc tray between a stock position and a play position; a driving motor for driving both the carrying mechanism and the elevating mechanism; and a switching mechanism for selectively supplying a driving force from the driving motor to the carrying mechanism and the elevating mechanism.

Abstract: This invention provides a disc driving device used for rotationally driving a disc-shaped recording medium, comprising: a motor (3) in which a rotary shaft (2) attached to a rotor housed in a case (1) is provided to protrude from the case; and a turntable (4) having a setting portion (4d) for setting a disc (201) thereon and a cylindrical portion (4a) provided to protrude inward, and mounted on the proximal end side of the rotary shaft (2) so as to cover the proximal end side of the rotary shaft (2) by the cylindrical portion (4a).

Abstract: An adjustment method for optical pick-up including a light source for emitting light beams, an object lens for irradiating light beams onto an optical disc for adjustment and a drive portion for driving the object lens in a direction in parallel to the optical axis of the object lens and in a direction perpendicular to the optical axis thereof, wherein in the state where the light source is movably held with respect to the object lens and the drive portion is movably held with respect to the light source, light beams are irradiated onto an optical disc for adjustment concentrically having recording tracks from the optical pick-up to adjust relative position of the object lens with respect to the light source and inclination of the optical axis of the object lens, and an optical disc for adjustment used in such an adjustment method.

Abstract: An optical pickup device for recording and/or reproducing the information on or from an optical disc.

Abstract: An objective lens driving apparatus having a lens holder, elastic supports, and a drive unit. The lens holds an objective lens. The elastic supports are secured at one end to the lens holder and at the other end to a fixed section, thereby allowing the lens holder to move. The drive unit drives the lens holder in a direction parallel to an optical axis of the objective lens and in a plane perpendicular to the direction parallel to the optical axis. The drive unit has at least two magnets provided on the lens holder, a coil section secured to the fixed section, and a yoke. The yoke constitutes, a closed magnetic circuit, along with the magnets. In the drive unit, said at least two magnets are arranged, opposing each other, the coil section is located in a gap between said at least two magnets, and a center of the gap is aligned with a center of the coil section.

Abstract: A plasma gas is injected from a vortex flow forming hole defined to an insulator in a tangential direction with respect to the circumference of the arc column of a torch to enable the axis of the arc column to be aligned with the axial of the torch and a vortex annular gas sheath is coaxially formed to thereby narrow down a plasma flame. Further, the torch comprises the above insulator and a casing which are connected in series each other.

Abstract: A reactor containment vessel with a cooling system includes a communication pipe having a valve to be connected to either an emergency condenser or suppression chamber in order to improve cooling performance by removing non-condensable gas from heat exchanger tubes when a main steam line is broken. One open end of the communication pipe is opened and positioned at a low position of the dry well. The valve is constantly closed and actuated to be opened in an abnormal condition of a reactor. When the valve is opened, the communication pipe introduces the non-condensable gas existing in the emergency condenser or suppression chamber to the low area of the dry well due to a density differential between steam and non-condensable gas, thus removing the non-condensable gas from the heat exchanger tubes, and improving the cooling performance of the emergency condenser.

Abstract: A heat fixing roll for a copying machine includes an insulating layer formed on the surface of a hollow tube, a heating resistor layer formed on the surface of the insulating layer by uniformly thermal spray coating a resistor material, a screw-like heating resistor formed by forming a helical groove having a depth reaching the surface of the insulating layer by using a laser irradiation head connected to an electric resistance compensator, and an antisticking layer formed on the surface of the resistor and the groove by coating. The present invention also provides a method of producing the heat fixing roll and an electronic copying machine provided with the roll.

Abstract: Use of a resin powder composition for electrostatic coating, wherein said resin powder composition comprises (1) a thermosetting or thermoplastic resin and (2) an electric charge-increasing agent incorporated in the resin.

Abstract: A cover for forming a space for coating is provided above an electroconductive belt conveyor for adjusting an electric field at an end portion of a flat plate-like object to be coated, electrostatic powder coating guns pointed at the object to be coated on the belt conveyor in the space for coating are provided, and means for introducing air into the space for coating and means for exhausting the air are respectively provided. As a result, the strength of the electric field formed from the electrostatic powder coating guns to the electroconductive belt conveyor and the object to be coated is made uniform through their entire surface so that the thickness of a powder layer to be adhered to the object to be coated is made uniform from its central portion to an end portion. Consequently, the waste of the powder coating material is prevented, and local cracks in a portion having a great thickness generated when the coated object is bent are prevented.

Abstract: A powder charging apparatus, in which a plasma electrode pair is disposed within an insulative tubular passage for transporting powder as carried by gas, a device for intermittently applying a D.C. voltage between that pair of plasma electrode is provided to form a space where mainly desired polarity ions drawn from the plasma electrode pair exist and another space where mainly opposite polarity ions exist, well dispersed powder is fed to the former space where mainly the desired polarity ions exist, and thereby stable and strong charging performances can be assured for a long term without adhesion and accumulation of the powder to and on either one of the pair of plasma electrodes; and an electrostatic powder painting apparatus containing this powder charging apparatus therein and having excellent penetrating performance and painting efficiency.

Abstract: It is described a novel powder charging apparatus, wherein a high voltage is applied between a couple of electrodes, consisting of a plasma electrode of required polarity and a plasma electrode of opposite polarity, to form plasma at tip of each of electrodes, an eventually finely dispersed powder is made to pass only through an area wherein mainly ones of negative and positive ions derived of said plasma, that is, ions of required polarity exist, and thereafter the charged powder is discharged. In this apparatus, the adhesion of powder to each electrode is prevented and charging performance is maintained for a long time. It is also described an electrostatic powder coating apparatus comprising the above-described novel powder charging apparatus, which is excellent in performance for making thick coating, depositing efficiency and throwing power.

Abstract: In an automatic powder feeding apparatus of the type that the apparatus comprises a sensor nozzle for blowing a carrier fluid into an inlet of a detector tubular passageway having an inlet and an outlet, apparatus for detecting a pressure difference between an inlet side pressure detecting port provided upstream of the outlet of the sensor nozzle and an outlet side pressure detecting port provided at the outlet of the detector tubular passageway, apparatus for shunting a part of the carrier fluid to the inlet side pressure detecting port and regulating a pressure at the outlet of the detector tubular passageway, the apparatus for regulating a pressure at the outlet of the detector tubular passageway being an injector connected via a valve to the outlet, and an automatic control valve having the pressure difference applied as its input and a flow rate of a driving fluid of the injector issued as its control output and including apparatus for presetting a set value corresponding to the pressure difference, in o