Abstract: A belt drive control device of the present invention is constructed to sense the angular displacement or the angular velocity of a driven roller, separates from the angular displacement or the angular velocity sensed an AC component having a frequency that corresponds to the periodic thickness variation of an endless belt in the circumferential direction, and then controls the rotation of a drive roller in accordance with the amplitude and phase of the AC component.

Abstract: A belt drive control device of the present invention is constructed to sense the angular displacement or the angular velocity of a driven roller, separates from the angular displacement or the angular velocity sensed an AC component having a frequency that corresponds to the periodic thickness variation of an endless belt in the circumferential direction, and then controls the rotation of a drive roller in accordance with the amplitude and phase of the AC component.

Abstract: A drive control method includes detecting an angular displacement of a rotor driven by a pulse motor, calculating a difference between the detected angular displacement and a preset target value of the angular displacement, and calculating a drive pulse frequency of a drive pulse signal used to drive the pulse motor. The pulse motor is driven by the drive pulse signal having the drive pulse frequency to allow the rotor at a constant angular velocity.

Abstract: A belt drive control device constructed to sense the angular displacement or the angular velocity of a driven roller. The belt drive control device separates, from a sensed angular displacement or the angular velocity, an AC component having a frequency that corresponds to the periodic thickness variation of an endless belt in the circumferential direction, and then controls the rotation of a drive roller in accordance with the amplitude and phase of the AC component.

Abstract: An image forming apparatus including an image carrying member, a transfer member, support rollers, a detecting mechanism, and a controller. The image carrying member forms a toner image on its surface facing a surface of the transfer member, supported by the support rollers, which transfers the toner image to a recording medium. The detecting mechanism includes a detection roller, a roller shaft, a moving member, and a sensor, and detects a speed of the transfer member. The detection roller includes one support roller selected from the support rollers, and is provided with the roller shaft. The moving member is directly fixed to the roller shaft and rotates with the detection roller. The sensor detects a moving speed of the detection roller with the moving member. The controller controls a traveling speed of the transfer member to a target speed based on a detection result of the sensor.

Abstract: A drive control method includes detecting an angular displacement of a rotor driven by a pulse motor, calculating a difference between the detected angular displacement and a preset target value of the angular displacement, and calculating a drive pulse frequency of a drive pulse signal used to drive the pulse motor. The pulse motor is driven by the drive pulse signal having the drive pulse frequency to allow the rotor at a constant angular velocity.

Abstract: A belt drive control device of the present invention is constructed to sense the angular displacement or the angular velocity of a driven roller, separates from the angular displacement or the angular velocity sensed an AC component having a frequency that corresponds to the periodic thickness variation of an endless belt in the circumferential direction, and then controls the rotation of a drive roller in accordance with the amplitude and phase of the AC component.

Abstract: An image forming apparatus of the present invention includes a conveyance path extending from a sheet tray to an image forming section. A switchback path with a reversing device is connected to the intermediate portion of the conveyance path for switching back a sheet thereon. The switchback path reduces an interval between consecutive sheets being conveyed in the apparatus for thereby enhancing the productivity of image formation. In addition, the switchback path switches back a sheet being conveyed via a refeed path and the above conveyance path in a duplex print mode, thereby obviating the need of an exclusive switchback path for the duplex print mode. The apparatus is reduced in thickness despite the presence of the switchback path.

Abstract: A machine tool precision-measuring apparatus comprising: a first linear movement distance-measuring means 17 including a first slide shaft 11, a first slide bush 13 slidably attached to the first slide shaft 11, and a first distance sensor 15 for measuring a distance that the first slide shaft 11 relatively travels with respect to the first slide bush 13; and, a second linear movement distance-measuring means 18 including a second slide shaft 12 positioned across the first slide shaft 11, a second slide bush 14 connected to the first slide bush 13, the second slide bush 14 being slidably attached to the second slide shaft 12, and a second distance sensor 16 for measuring a distance that the second slide shaft 12 relatively moves with respect to the second slide bush 14.

Abstract: An image forming apparatus of the present invention includes a conveyance path extending from a sheet tray to an image forming section. A switchback path with a reversing device is connected to the intermediate portion of the conveyance path for switching back a sheet thereon. The switchback path reduces an interval between consecutive sheets being conveyed in the apparatus for thereby enhancing the productivity of image formation. In addition, the switchback path switches back a sheet being conveyed via a refeed path and the above conveyance path in a duplex print mode, thereby obviating the need of an exclusive switchback path for the duplex print mode. The apparatus is reduced in thickness despite the presence of the switchback path.

Abstract: A gate array driven by a plurality of source voltages and an electronic equipment using such a gate array are provided. The gate array comprises a plurality of P-well regions and a plurality of N-well regions, all of which are formed in an internal cell region in a first direction and alternately arranged in a second direction perpendicular to the first direction on a semiconductor substrate. A plurality of first basic cells receive a first source voltage VDD1 through a first source wiring layer, these first basic cells being respectively formed on a pair of P-well and N-well regions. A plurality of second basic cells receive a second source voltage VDD2 through a second source wiring layer, these second basic cells being respectively formed on a pair of P-well and N-well regions. A voltage level shifter for shifting the voltage level between data voltages outputted from first and second basic cell trains is formed on an region containing at least three of the P-well and N-well regions.

Abstract: A method for manufacturing a predetermined shape of molded plastics, comprising the steps of introducing a foamable shell forming material in molding dies, introducing a hard core forming material having a foaming agent on the shell forming material, clamping the molding dies together, and heating both the material located in the molding dies by an induction heating.

Abstract: A method of manufacturing a protective and decorative molding for an automobile, comprising the steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; successively forming the kneaded mixture into an elongated rod or sheet blank by means of extruder or calender rolls; shearing the rod or blank into pieces having a predetermined shape; and molding the piece in a mold having high-frequency heating electrodes to apply a high-frequency voltage to the piece so that the foaming agent contained in the piece decomposes and foams to provide a product having a predetermined shape.