Abstract: An original scanning section has an illuminating source, and optically scans an original in the first direction to obtain a reflected light from the original. A designating section designates a desired range of the original as a designation area. Each of photosensors is arranged in the second direction perpendicular to the first direction so as to receive part of the reflected light and output a detection signal corresponding to a density of each portion of the original. A weighting operation section receives a designation output from the designating section, provides different weighting data for an inside area and an outside area of the designation area, receives each detection signal from the plurality of photosensors, operates each detection signal using the different weighting data, and outputs a density signal of the original.

Abstract: A paper supply device includes a plurality of feeders for feeding sheets of paper respectively. An actuator actuates one of the feeders which is used for feeding the paper. A detector respectively detects the frequency of the use of the feeders actuated by the actuator. An indicator indicates the result of the detection for the respective feeders according to the frequency of the use of the feeder detected by the detector.

Abstract: Cleaning of gums, sludge and other adhering on a fuel injection valve in a fuel injection internal combustion engine can be done by driving of engine with a cleaning agent as a mixture of gasoline and an aromatic solvent. The mixture is adjusted the mixture rate thereof to satisfactorily combustion in an engine cylinder and dissolve gums, sludge and other adherings on the fuel injection valve. The cleaning agent is supplied to the engine cylinder through the fuel injection valve and during passing through the fuel injection valve it dissolves the adherings.

Abstract: An image forming apparatus of the invention has a cooling fan which is used for forcibly decreasing a temperature raised by heat generated as a result a copying operation being performed, and which can be switched between high-speed/low-speed rotation modes. The image data on a document supported on an original table is exposed by an exposure lamp, regulated by a lamp regulator under the control of a main controller, and is optically scanned. The main controller forms an optical image corresponding to the image data on a photoconductive drum, develops it by means of a developing unit having a solenoid, and forms the developed image on a sheet. The image formed on the sheet is fixed by a fixing unit having a heater lamp under the control of a fixing unit controller. A cooling fan controller drives the cooling fan in a high-speed mode during the above copying operation and for a predetermined period of time after completion of the copying operation, thereby cooling the interior of the apparatus.

Abstract: A foam extinguishing system in which a foam generating net is provided at the front of a chamber, and foam nozzles and a gas discharge nozzle are provided at the rear of the chamber is disclosed wherein in order to lengthen the flying distance and suspension time of the non-combustible gas solution discharged from the gas discharge nozzle a deflector is provided in front of the nozzle to reflect and disperse a non-combustible gas solution discharged from the nozzle rearwards or sideways from the rear. The gas discharge nozzle provided with the deflector may be also located in such a position that the non-flammable gas solution reflected and dispersed by the deflector does not disturb the discharge pattern of a foam solution from the foam nozzles and that the non-combustible gas is pushed forward by an air flow generated in the air by a negative pressure.

Abstract: An original transfer apparatus used in an image-forming apparatus for forming an image in accordance with image information from an original set on an original table, whereby the original is transferred to the original table, is provided with a housing which is removably attached to the image-forming apparatus. The housing contains therein a transfer mechanism for swallowing and transferring the original to the original table. A drive source for driving the transfer mechanism is integrally provided in the housing. Since the drive source is contained in the housing, the original transfer apparatus can be mounted on the image-forming apparatus with ease.

Abstract: A corona discharger is swingably and elastically supported in the direction contacting with or separating from a photosensitive drum always in the state urged toward the photosensitive drum side, and a supporting arm provided integrally with the corona discharger is contacted with the photosensitive drum, a shaft or relatively fixedly disposed member relative to the photosensitive drum, thereby positioning it relative to the photosensitive drum of the corona discharger. Therefore, an interval between the photosensitive drum and the corona discharger can always be maintained constant with a relatively simple structure, and can also perform always stable corona discharging operation.

Abstract: This invention is directed to a clam shell type image forming device whereby the upper unit is pivotally mounted with respect to the lower unit. Conversely, the upper unit is latched into a lower portion with the lower unit. If desired, however, the upper unit can be rotated to an upper position at a fixed angle. This is desirable, for example, if the operator must remove jammed paper from the device as to, otherwise, repair any defects. The invention utilizes a latching handle which permits the operator to unlatch the upper unit from the lower unit. The handle is not permitted to operate unless the carrier is moved to its predetermined position.

Abstract: An electrophotographic copier includes a housing having a lower frame and an upper frame pivotally connected to the lower frame. A lower paper supplying device and an upper paper supplying device are provided on the housing. The lower and upper paper supplying devices include first and second paper guide plates, respectively. A third paper guide plate is pivotally mounted on the first side of the lower frame and it defines a first paper feed guide path of the lower paper supplying device with the first paper guide plate and a second paper feed guide path of the upper paper supplying device with the second paper guide plate.

Abstract: In an electric control method for an automobile air conditioner, a digital computer is utilized to calculate a function required to direct the actual in-car temperature toward a desired value in consideration with various changes of ambient temperature and the calculation is compensated to effectively reduce a difference between the actual in-car temperature and the desired value when the rate of change of the actual in-car temperature becomes below a predetermined value.

Abstract: A method for air conditioning for vehicles comprising a step of detecting a temperature of a passenger compartment of a vehicle, an atmospheric temperature and a preset temperature in the initial period of air conditioning, a step of judging the results of comparisons between said temperatures and a step of switching between air conditioning by the circulation of inside air and air conditioning by the introduction of outside air.

Abstract: A button-less push switch board including a plurality of push switches which comprises an insulator plate having a plurality of penetrating holes, a transparent flexible cover sheet overlying the main surface of the insulator sheet and having identification marks printed thereon to indicate the positions and functions of the switches, and a printed circuit plate on the reverse surface of the insulator plate and having fixed contacts formed thereon. A transparent block is disposed in each hole of the insulator plate and is urged towards the cover plate by elastic members supported thereon. Each elastic member is of cup-like shape and has a movable contact corresponding to a pair of fixed contacts on the printed circuit plate. A lamp or a light emitting diode is disposed in each hole of the insulator plate and is mounted on the printed circuit. Each fixed contact and each lamp or light emitting diode are connected to an external control circuit.

Abstract: In an electric control method and apparatus for an automobile air conditioning system, an air-blend door is arranged between an evaporator and a heater within an air duct to control an amount of the cooled air flowing through the heater into a passenger compartment and to control an amount of the cooled air directly flowing into the compartment, and a refrigerant compressor for the evaporator is connected to a prime mover of the automobile when the air-blend door is opened to allow the cooled air flowing through the heater in a limited range and is disconnected from the prime mover when the air-blend door is further opened to allow the cooled air flowing through the heater beyond the limited range.

Abstract: A method and apparatus for controlling an automobile air conditioner wherein a deviation between the actual in-car temperature and a desired in-car temperature is periodically calculated to detect such various thermal disturbances as changes of the solar heat, the temperature of outside air, the number of passengers and the like, and wherein a compensation value of the opening angle of the air-blend door is determined in accordance with the periodical variation of the deviation to ensure stable control of the in-car temperature.

Abstract: In an electric control method for an automobile air conditioner, a digital computer is utilized to calculate a function required to direct the actual in-car temperature toward a desired value in consideration with various changes of ambient temperature and the calculation is compensated to effectively reduce a difference between the actual in-car temperature and the desired value when the rate of change of the actual in-car temperature becomes below a predetermined value.

Abstract: An electric control method and apparatus for an automobile air conditioner which is capable of conducting recirculation of inside air from a passenger compartment into an air duct under undesired outside air conditions caused by noxious gases, dust and the like and is also capable of conducting induction of outside air into the compartment through the air duct when the undesired outside air conditions are extinguished.