摘要:
In a linear motor comprises one or more moving units provided to move linearly on a base frame, one or more magnetic field forming members to opposed each of the moving units, and moving means provided on said magnetic forming members for moving the magnetic forming members on the base frame by reaction force occurring when the moving units are driven, whereby vibration acting on the base frame at the time of moving of the linear motor can be cancelled by the motion of the magnetic field forming members.
摘要:
An electrified transfer recording apparatus, which is characterized in that a draw-back region is provided for the end part of a printing head to be used for the electrified transfer recording apparatus which drives selectively a plurality of recording electrodes allocated on an insulated base material for the electrified transfer ribbon consisting of a thermal transfer ink and a resistance layer.
摘要:
In a state that a wafer stage is not positioned in the center of the Y-direction traveling range, thrusts Fa, Fb supplied from a pair of linear motors to a Y-direction stage are made different and the Y-direction stage is moved in the X direction so that moments Ma, Mb about the centroid of the Y-direction stage by the thrusts Fa, Fb cancel each other. Since the moments Ma, Mb about the centroid generated by the thrusts cancel each other and the thrusts do not act as forces for rotating the Y-direction stage, the Y-direction stage is not deflected in a yawing direction. Such a stage device as constructed above can prevent deflection in a yawing direction due to displacement of the centroid position of an object to be positioned or a stage and precisely move the object to be positioned to a target position.
摘要:
A corona discharge device includes a plurality of discharge electrodes each having a pointed tip for concentrating electric field, a plurality of resistors and a common electrode, each of the plurality of resistors connects corresponding one of the plurality of discharge electrodes to the common electrode, and causes a prescribed voltage drop within a range of from 200 V to 2000 V.
摘要:
A moving apparatus for an optical system is a duplicating machine is arranged as to effect a scanning operation of document images through the movement of two units of mirror platforms respectively. One of the platform moves at a scanning speed while the other platform moves at one half scanning speed. A stator for a polyphase brushless motor is provided along the moving direction of the apparatus on both the side portions of the moving region of each mirror platform. Two sets of rotors of core-less coils operatively react with the stator to form polyphase brushless linear motors. The mirror platforms are driven by the motors at their center of gravity.
摘要:
A display apparatus that has a display screen visible from a back face or a side face of an image forming apparatus is disposed on at least one side face of an image forming apparatus case.
摘要:
A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.
摘要:
A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.
摘要:
A process is provided for the production of a webbing take-up spindle by cold-forming of a cylindrical blank. The cylindrical blank is cold-formed into a preform having a flange-shaped disc portion and a spindle portion extending from and in continuation with said disc portion. Wedge action dies, whose pressing portions are in the form of ratchet teeth, are pressed against an upper and lower sides of an outer peripheral portion of the disc portion, respectively, so that ratchet teeth are partially formed and a thin-walled portion is also formed circumferentially along said partially-formed ratchet teeth. The thin-walled portion is then punched to fully form the ratchet teeth. A forming apparatus suitable for use in the practice of the process is also disclosed.
摘要:
To provide an ink jet image forming method and an ink jet image forming device capable of forming an image of superior quality by using quickly drying ink and slowly drying ink in combination, wherein deviation which may occur in a discharge position of ink causes no reduction in the resolution of the image, black ink is adopted as the slowly drying ink, and so is white ink as one of the quickly drying ink. A white dot is formed with the white ink in a position to form a black dot on white recording paper, thereafter applying the black ink thereto. Deviation which may occur in the discharge position of the quickly drying white ink on the recording paper thus becomes almost visually unnoticeable.