摘要:
The heat fixing device includes a heating roller and a pressure roller disposed in contact with the heating roller, the heating roller includes a base member and a surface layer, and the surface layer has a surface resistivity of 1×1016 &OHgr; or lower, and a residual elongation percentage of 3% or lower. By this arrangement, charging of the heating roller can be prevented so that the recording medium can be prevented from being curled around the heating roller.
摘要:
A heating device for use in an induction heating type fixing system is composed of a sleeve 12 made of an electrical conductive material and an electromagnet 13 with a coil 20 and a core 18. It is constructed so as to fulfill the following formulas (1), (2), and (3).S1+S2.gtoreq.0.3.times.S3 (1)0.2.ltoreq.S2/(S1+S2).ltoreq.0.8 (2)1 mm.ltoreq.Dmax.ltoreq.5 mm (3)wherein S1 stands for the cross sectional area of the core 18, S2 for the cross sectional area of the coil 20, S3 for the cross sectional area of the sleeve 12, and Dmax for the maximum distance formed between the outer periphery of the holder 14 and the inner periphery of the sleeve 12.
摘要:
A chip feed apparatus capable of permitting a chip feed casing to be used for storage and transportation of chips in a distribution channel as well and preventing a weight of chips from being applied to a chip storage space of a hopper, resulting in positive separation and feeding of chips by the hopper. The chip feed apparatus includes a chip feed casing formed on a side surface thereof with a chip outlet, a hopper formed on a side surface thereof with a chip inlet and connected to the chip feed casing while enabling vertical movement of the hopper, a chip separating and aligning pipe inserted into a hole communicating with the chip storage space, and a chip feed path of which one end communicates with the chip separating and aligning pipe and the other end is defined at a chip pick-up position. The chip outlet of the chip feed casing is open at a lowermost end of a chip receiving space or below the lowermost end. The side surface of the chip feed casing and the side surface of the hopper are connected to each other while the chip outlet and chip inlet are kept aligned with each other.
摘要:
An image forming apparatus and a fixing device used therein capable of discriminating transport condition of a sheet in the fixing device without sheet sensors. The fixing device is provided with a fixing roller for heating unfixed toner borne on a sheet and fixing the toner onto the sheet. A temperature sensor is arranged for detecting the temperature of the fixing roller, which temperature sensor communicating with a controller of the image forming apparatus or the fixing device. The controller discriminates the transport condition of the sheet based on the temperature change of the fixing roller detected by the temperature sensor so as to execute varied control.
摘要:
Discharge machining for machining a workpiece in a tapered configuration by applying electric current to the workpiece and the machining electrode, and moving the electrode relative to the workpiece in a main machining direction and also in a direction substantially perpendicular thereto. The electrode is initially advanced relative to the workpiece in the main machining direction to a predetermined position or depth. The electrode is then moved relative to the workpiece in a direction perpendicular to the main machining direction while retracting the electrode. When the machining gap is lowered, the electrode is moved toward the center of the circulating locus of the electrode, and thus a shortcircuit between the electrode and the workpiece can be prevented.
摘要:
Apparatus for automatically inserting parallel leads of electronic components into openings in a printed circuit board having an improved lead holding and guiding assembly. The improved lead holding and guiding assembly is associated with the frame of the apparatus and includes a guiding member mounted for rotation about an axis of rotation which extends in the x-direction, i.e., in the direction of a line which is orthogonal to both of the parallel leads, and for longitudinal movement in the z-direction, i.e., in the direction which is perpendicular to the orthogonal plane which contains the orthogonally extending line. The holding and guiding assembly further includes a pair of holding members disposed at respective sides of the guiding members such that the side surfaces of the end portion of the guiding member and the respective inner side surfaces of the holding members constitute lead holding and guiding portions. The holding members are mounted for rotation relative to the guiding member about respective axes of rotation so that the lead holding and guiding portions can be opened and closed as the holding members are rotated.
摘要:
Apparatus for supplying and transferring electronic components includes a plurality of pallets each for receiving and holding one electronic component. An endless conveying mechanism conveys the pallets in and intermittent fashion on a substantially horizontal plane. A supply unit mechanism selectively supplies electronic components to the pallets.
摘要:
Herein disclosed is an electric discharge machine, by which, after the machining operation of a workpiece by an electrode has reached a predetermined position, the machining operation is further accomplished while rocking the electrode in a plane generally normal to the feeding direction of the workpiece for the machining operation. The workpiece has its respective portion uniformly machined by effecting the machining operation accompanied by the rocking motions for a preset period, e.g., either for a predetermined time period or a predetermined number of the rocking motions so that the precision of the finishing operation can be improved.
摘要:
An electrical discharge machine control device which controls the displacement of the relative positions of a machining electrode and a workpiece so that the relative positions of the electrode and workpiece are changed not only in the main direction in which the workpiece is machined with the electrode but also in a plane perpendicular to the Z-axis without rotating the electrode while a predetermined machining discharge gap is maintained between the electrode and the workpiece. The relative displacement in the perpendicular plane is displayed at an enlarged scale on an X-Y display device which may be a cathode-ray tube with the center of the displacement maintained at a predetermined origin point. An optical encoder detects the movement in the X-Y plane to provide a detection signal. The detection signal is applied through reversible counters to the horizontal and vertical deflection amplifiers of the display device.
摘要:
A fixing device is provided with first and second fixing members each having an elastic member, a heater for heating at least one of the first and second fixing members and a controller. The first and second fixing members are abutted against each other so that the elastic members contact with each other. A sheet carrying an image of a developer is passed between the first and second fixing members, whereby the developer is fixed onto the sheet. The controller corrects fixing conditions including a fixing speed and a fixing temperature in accordance with an integrated energizing time that is an integrated value of an energizing time of the heater.