Abstract: A method for rotating an image with which the image can be rotated with a small memory area, a program for rotation, a recording medium and a rotation device are provided. A memory area for storing image data is sectioned into a plurality of square image areas, one line among lines of a periphery of the memory area in an initial state is secured as a temporary storage area, the remaining area is secured as an image area, and an image in an initial state is rotated by performing rotation and movement of the image data in the memory area for each square unit via the temporary storage area.

Abstract: The present invention provides a metal-graphite composite material favorable to two-dimensional diffusion of heat and having a high thermal conductivity in two axial directions, and a production method therefor. The metal-graphite composite material of the present invention includes: 20 to 80% by volume of a scaly graphite powder; and a matrix selected from the group consisting of copper, aluminium and alloys thereof, wherein the scaly graphite powder in which a normal vector to a scaly surface thereof is tilted at 20° or higher with respect to a normal vector to a readily heat-conducting surface of the metal-graphite composite material is 15% or less relative to a whole amount of the scaly graphite powder, and the metal-graphite composite material has a relative density of 95% or higher.

Abstract: A fixing device fixes a toner image on a recording medium. The fixing device includes a heat source that converts electric power into heat and a fixing member that gives the heat generated by the heat source to the recording medium on which the toner image is formed. The fixing device includes a safety circuit that forcibly interrupts voltage supplied from a power supply to the heat source if the temperature in the device detected by a temperature detection sensor exceeds reference temperature. The fixing device has a malfunction preventing circuit that stops the operation of the safety circuit in order to prevent the voltage supplied to the heat source from being forcibly interrupted when the voltage of the power supply supplied to the heat source is unstable.

Abstract: An object of the present invention is to provide a metal-based carbon fiber composite material that exhibits an improved thermal expansion coefficient and an improved thermal conductivity, and is smaller in weight. The metal-based carbon fiber composite material of the present invention comprises a metal and a carbon fiber comprising a micron carbon fiber and a nanofiber; the composite material having a first surface; the micron-size carbon fiber being oriented in one direction parallel to the first surface of the composite material, and being continuous from one end to the other end; at least 80% of the nanofiber being oriented at an angle within 30° with respect to the first surface; and the nano-size carbon fiber being oriented randomly in a plane parallel to the first surface.

Abstract: This utility model relates to the improvement of the high-frequency heating device providing high-frequency electricity with the box used for the heating-up. The high-frequency electricity was generated by high-frequency oscillator in the high-frequency heating device based on the high-frequency induction heating method.

Abstract: The invention provides a metal-based carbon fiber composite material that can be prepared with commonly used cheap materials and less energy than in a melt method, has a wide range of dimensions and shapes (particularly large area) and is excellent in the thermal conductivity and light in weight. The metal-based carbon fiber composite material can be obtained by heating and pressure welding a metal and carbon fibers and has a structure in which a metal layer and a carbon fiber-containing metal layer are alternately stacked. The metal-based carbon fiber composite material can be produced by a method comprising the steps of: adhering carbon fibers on a sheet or foil metal support to form a preform; stacking the preforms to form a preform laminate; and heating and pressure welding the preform laminate in a vacuum or non-oxidizing atmosphere to unite the preforms together.

Abstract: A method is provided for producing a metal-based carbon fiber composite material lightweight, high in the thermal conductivity and also capable of controlling the direction of heat flow, while inhibiting metal carbide formation. The method for producing the metal-based carbon fiber composite material comprises the steps of: obtaining a metal fiber mixture by physically mixing carbon fiber with metal powder; filling the metal fiber mixture into a jig, while the metal fiber mixture is aligned; and setting the jig in an air, vacuum or inert gas atmosphere and directly supplying pulse electric current to the metal fiber mixture, with applying a pressure, to effect sintering by the heat generated therefrom. Here, the composite material contains 10 to 80% by weight of carbon fiber based on a total weight of the composite material and is sintered at 70% or more of ideal density.

Abstract: When the sub-scanning beam position does not fall within a target range by the last directive value, the drift direction of a galvanomirror is estimated on the basis of the last directive value. A directive value is provided to the galvanomirror and then changed so that the sub-scanning beam position is shifted in the estimated direction in steps from the position corresponding to the last directive value. A decision is then made as to whether the directive value in the galvanomirror has reached a predetermined value. When the predetermined value is reached, the galvanomirror is directed to shift the beam position in the direction opposite to the estimated direction in steps from the position corresponding to the last directive value. As a result, a great load is prevented from being imposed on the galvanomirror during the laser beam sub-scanning direction position control.

Abstract: In this invention, a precise multi-beam control process can be effected while suppressing an influence due to the drift of a galvanomirror by effecting the multi-beam position control process during the copying operation, that is, by repeatedly effecting the sub-scanning position control process and main scanning position control process. Therefore, an image can be prevented from being deviated at the front and rear end portions of one sheet of paper.

Abstract: The timing control of optical beams (i.e., the control of the beam positions in the main scanning direction) and the beam amount control of the optical beams for position control (i.e., the control of the beam positions in the sub-scanning direction) are performed independently of the control of the amount of optical beam actually used for printing. Accordingly, the timing control of optical beams and the beam amount control of the optical beams for position control can be performed without reference to the characteristic change which the photosensitive drum may undergo with time. Even when the powers (second powers) of the optical beams incident on the photosensitive drum increase due to the characteristics change of the photosensitive drum or for some other reason, this power increase does not adversely affect the timing control of optical beams, nor does it vary the powers (first powers) of the optical beams which are incident on the optical beam sensor at the time of position control.

Abstract: A yarn traversing apparatus includes a first traverse member having rotary blades for traversing a yarn from a center toward ends of a traverse stroke, and a second traverse member having rotary blades for traversing the yarn from the ends toward the center of the traverse stroke in order to wind the yarn onto a bobbin to form a yarn package. Guide rails are provided so as to maintain the speed of the yarn constant as it is conveyed by the first traverse member, and to gradually decrease the speed of the yarn from the ends of the traverse stroke to the center of the traverse stroke as it is conveyed by the second traverse member, from a speed that is 1.5 to 7 times that of the first traverse member, to a speed substantially the same as that of the first traverse member.

Abstract: A bobbin holder comprises a rotatable support member, a plurality of bobbin holding devices inserted onto the rotatable support member, and at least one cylindrical member inserted onto the rotatable support member and engaging with the bobbin holding device, so that bobbin holding devices are expanded so as to hold bobbins. A main compression member for radically expanding the bobbin holding devices is disposed at one end of the bobbin holder. At least one supplementary compression member for supplementing expansion force of the main compression member is disposed at an intermediate portion between a bobbin holding device located at the end where the main compression member is disposed and another bobbin holding device located at an opposite end.

Abstract: A bearing cooling apparatus of a heating roller wherein the heating roller includes a roller, heating means disposed inside the roller, and a shaft having the roller mounted thereon, comprising a housing having the shaft rotatably supported thereto by bearings attached to the housing and formed with a first passageway and a second passageway, and means for circulating a cooling medium through the first and second passageways. At least one of the first and second passageways extends along the bearing disposed adjacent the heating means and along the shaft and are disposed adjacent the bearing and the shaft.

Abstract: A drive method for the winding of a yarn wherein the yarn is wound on a bobbin holder and into a yarn package by contacting a contact roller with the package and controlling the number of rotations of the contact roller or tension of the yarn so as to be a predetermined value. When the contact roller is driven by an induction motor and also the contact roller is driven in pressing contact with the package by the induction motor, the number of rotations of the contact roller is given by the following equation: N=n1-(K.multidot.m (n0-n1)/T1), wherein the N indicates the number of rotations (r.p.m.) of the contact roller with which the contact roller is operated in pressing contact with the bobbin holder, the n0 indicates the number of rotations (r.p.m.) which is synchronized to the power frequency of the motor driving the contact roller, the n1 indicates the number of rotations (r.p.m.

Abstract: A spindle drive type yarn winding apparatus of the bobbin changing type includes a motor for driving a bobbin holder; an inverter for supplying electric power to the motor; a contact roller for contacting with and driven by a bobbin inserted on the bobbin holder or a package wound on the bobbin; a controller for performing at least integral control action to the motor so as to control the rotating speed of the contact roller at a predetermined value; a setter which sets the winding speed, density of the wound package, stroke of the wound package and denier of the wound package, a first arithmetic circuit which calculates the diameter of the wound package; a second arithmetic circuit which calculates a gain of the controller based on winding conditions set by the setter, and diameter calculated by the first arithmetic circuit; and an altering device which alters the gain of the controller based on at least one factor set by the setter and the diameter of the wound package calculated in the first arithmetic cir

Abstract: A process for excavating and constructing a tunnel, and an excavating device are disclosed. This process is directed to excavating and constructing a tunnel under a railway or a road on a banking or on level land in the direction transverse to the railway or road. In this process, pits are dug on the opposite sides of the railway, and then an excavator digs into the wall of a pit on one side so as to go out of the wall of the other pit through the ground left therebetween. In this respect, a hollow casing unit of a box shape is coupled to the rear end of the excavator equipped with a screw conveyor. As the excavator advances or digs forwards a given distance, another casing unit is in turn coupled to the rear end of the preceding casing unit, and then such a step is repeated, until the excavator goes out of the wall of another pit. In this manner, the excavator further digs into the wall of one pit in the position adjacent to the preceding run of casing units.

Abstract: A process for excavating and constructing a tunnel, and an excavating device are disclosed. This process is directed to excavating and constructing a tunnel under a railway or a road on a bank or on level land in the direction transverse to the railway or road. In this process, pits are dug on the opposite sides of the railway, and then an excavator digs into the wall of a pit on one side so as to go out of the wall of the other pit through the ground left therebetween. In this respect, a hollow casing unit of a box shape is coupled to the rear end of the excavator equipped with a screw conveyor. As the excavator advances or digs forward a given distance, another casing unit is in turn coupled to the rear end of the preceding casing unit, and then such a step is repeated, until the excavator goes out of the wall of another pit. In this manner, the excavator further digs into the wall of one pit in the position adjacent to the preceding run of casing units.