Abstract: This invention provides a two-component developer comprising magnetic carrier particles and toner particles which contain magnetic particles at a specified content, being excellent in high speed copying system.

Abstract: A monocomponent developer comprising a binder resin, a colorant and first and second offset preventing agents, wherein a softening point of said binder resin (Tm.sub.1), that of said first offset preventing agent (Tm.sub.2) and that of said second offset preventing agent (Tm.sub.3) satisfies relationship;Tm.sub.2 <Tm.sub.1 .ltoreq.Tm.sub.3a heat quantity change of said first offset preventing agent (.DELTA.H.sub.2) and that of the second offset preventing agent (.DELTA.H.sub.3) satisfies relationship;0.20 (mJ/mg).ltoreq..DELTA.H.sub.2 -.DELTA.H.sub.3 .ltoreq.1.50 (mJ/mg)A toner comprising a binder resin comprising (a) polyester resin made of etherified diphenol and dicarboxylic acid, and having an acid value of 15 to 50, (b) a colorant, (c) a first offset preventing agent having a softening point of 60.degree. to 110.degree. C. and an acid value of 3 to 45; and (d) a second offset preventing agent having a softening point of 110.degree. to 150.degree. C. and an acid value of 1 to 30.

Abstract: A zoom lens system includes a positive lens unit and a negative lens unit. Focusing in a focal length range from a shortest focal length condition to a middle focal length condition is performed by moving the positive lens unit, and focusing in a focal length range from the middle focal length condition to a longest focal length condition is performed by moving the negative lens unit. The zoom lens system fulfills the following condition: ##EQU1## where B.sub.f is a distance from a rear end surface of the zoom lens system to a film at the shortest focal length condition and .DELTA.t is a diagonal length of the film.

Abstract: A transmission mechanism is capable of effectively attenuating vibrations generated thereby during operation by converting vibrations into heat energy. The base plate is provided with a plurality of flexible connecting ribs and a plurality of substantially sectorial openings formed alternately around a motor base part for holding a motor and bearing parts for supporting the shafts of the gears. Each of the gears has a rim provided on its outer circumference with teeth, a hub and flexible arms connecting the rim to the hub. Vibrations generated by the motor and those generated by the gears strain the flexible connecting ribs of the base plate and the flexible arms of the gears, the strains of the flexible connecting ribs and the flexible arms are converted into heat energy in the end and the heat energy dissipates, so that the variations are attenuated and noise attributable to the vibrations is suppressed.

Abstract: A camera having a covering member which covers the upper side of the camera and having a projecting portion shaped as a pentagonal reflecting member; a first manually operable portion located at the covering member on one side of the projecting portion for designating one of a plurality of kinds of photographic data; a second manually operable portion located at the covering member on the other side of the projecting portion and adapted for commonly altering any of the plurality of kinds of photographing data to actually alter the designated one thereof in combination with the actual designation by the first manually operable portion; a light measuring device for measuring the luminance of the object to be photographed; a calculator for carrying out an exposure calculation based on the result of the light measuring; a display portion for displaying at least either one of shutter speed and aperture value obtained by the exposure calculation; and a display controller for controlling the display such that, when

Abstract: An image reading apparatus which reads document surface of open book-like document placed on a document platen in a face upward condition and detects height of the document. An image reader reads the document to output image data. A first detector detects a background luminance of the document in accordance with the image data. A second detector detects a height of document. A first determining device determines a background luminance distribution based on the background luminance of the document detected by the first detector. A second determining device determines a height distribution based on the height of document detected by the second detector. A first anomalies detector detects anomalies of the background luminance distribution. A second anomalies detector detects anomalies of the height distribution. A convertor converts the height distribution and the background luminance distribution each other.

Abstract: A camera system is capable of operating in a number of different photographic modes and includes a display system which provides information relevant to each of the modes. The camera system also includes an automatic film rewinding mechanism that has two modes of operation. In a first, automatic, mode, the tensioning of the film during winding is detected to indicate the end of the roll of film. Upon such detection, the film is automatically and fully rewound into the film cartridge. In a second, user selectable, mode a signal is manually provided by the user to initiate film rewinding. Rewinding of the film is stopped just prior to the time the end of the film enters the cartridge, so that a portion of the film leader remains extended outside of the cartridge.

Abstract: An image forming apparatus includes a first printing unit which forms a first image on a sheet with a first printing material and fixes the first image thereon by heat application; and a second printing unit which forms a second image with a second printing material on the sheet having the first image formed by the first printing unit, and fixes the second image thereon by heat application; the second printing material has a lower melting temperature than the first printing material and the second printing unit applies a lower temperature heat for fixation of the second image than the first printing unit.

Abstract: A camera includes a manually operable member having a plurality of distance measuring areas and for switching between exposure correction and AF area and between single photographing and continuous photographing. A viewfinder of the camera displays not only an object but also the above-described respective functions displayed on a LCD and switchable by the manually operable member. As a result, a photographer is allowed to perform photographing while looking at not only the object but also the state of the various functions displayed on the LCD in the finder.

Abstract: A mode selecting system of a camera which comprises a first mode group which includes a plurality of photo-taking modes, wherein photographing parameters are automatically set by the camera when each one among the modes of the first mode group is selected, and a second mode group which includes a plurality of photo-taking modes, wherein at least one of photographing parameters is manually settable when one among the modes of the second mode group is selected.

Abstract: A fixing device which changes the amount of heat received by a recording paper in accordance with a portion of the recording paper with respect to a paper transporting direction. The fixing device controls a heater for heating a fixing member so as to raise the temperature of the fixing member when a trailing half of the recording paper is disposed between the fixing member and a pressure member, or controls the heater so as to decrease the temperature of the fixing member when either one of a leading end and a trailing end of the recording paper is disposed between the fixing member and the pressure member.

Abstract: An image processing device in accordance with the present invention processes image data obtained by reading an original image including an image portion and a background portion to subdivide the original image into a plurality of images, the image data including density data representing density of each image. The device includes a device for outputting background density data, a device for outputting density coefficient data, a background color removing device for decreasing a value of density data corresponding to the background portion based on the background density data, and a density correcting device for increasing a value of density data corresponding to the image portion based on the density coefficient data.

Abstract: The image reading apparatus of this invention reads a desired image out of an original document with a CCD 1, edits a desired area of the thus read image with an edit processing part 4, and causes the edited area to be copied without being subjected to negative-positive inversion. The edit processing part 4 sets an optimum density severally for an area requiring negative-positive inversion and for an area not requiring negative-positive inversion. Thus, necessary information existing in the area of image and the area outside the image can be printed out without causing the formation of a completely black frame and density of the print can be optimized without discrimination between these areas.

Abstract: A film player includes an A-D conversion part for receiving a music signal from an external audio unit, a RAM write part for writing A-D converted music data in an integrated RAM, a RAM contained in a music card or a RAM contained in a film cartridge, and a RAM play part for playing music recorded in each RAM. The user externally inputs desired music and records the same in the RAM by an external switch through a control part, to play the music with reproduction of a picture.

Abstract: In an image forming apparatus, a toner image, formed by developing an electrostatic latent image on the photoreceptor, is primarily transferred to an intermediate transfer member and is secondarily transferred to a recording sheet. The image forming apparatus is provided with a retractable transfer member, which secondarily transfers the toner image on the recording sheet, and a retractable cleaning member, which removes a residual toner on the intermediate transfer member after the secondary transfer. In the above apparatus, when the primary transfer and the secondary transfer are not being performed, the transfer member and the cleaning member are allowed to contact with or retract from the intermediate transfer member.

Abstract: In electrophotographic image forming, there are provided a charging device and an image forming apparatus provided with the charging device for forming an image including no or less image noise by sufficiently suppressing generation of image memory due to untransferred residual developer. The charging device has, for example, a charging brush formed of a roller and a strip-like fiber member having a plurality of piles wound therearound. The brush satisfies a condition of 0.7s<d<1.5s where d(mm) is a wound margin of the strip-like fiber member, and s(mm) is an average distance between the piles in a width direction of the fiber strip member.

Abstract: A stationary barrel attached to a camera body, a first movable barrel, a second movable barrel and a third movable barrel are moved out successively. A first lens frame holding a first lens unit is held in the third barrel to be movable along the optical axis, and a second lens frame holding a second lens unit is held in the second barrel to be movable along the optical axis. With this arrangement, the three movable barrels are all housed in the stationary barrel, and the total moving-out mount of the three movable barrels is remarkably large compared to conventional arrangements.

Abstract: An image reproducing apparatus for reproducing an image recorded on successive frames of a film having a storage medium which information for each frame is readable from and writable on, the reproducing apparatus includes a pick-up device for picking up the image from the film; a read and write device for reading and writing frame information from and on the storage medium in a specified relative movement to the film; a drive device for rendering the specified relative movement and such special relative movement as fast transporting, rewinding; a directing device for directing the special relative movement; and a controller for keeping the drive device from rendering the special relative movement when the information reading and writing is performed.

Abstract: A mobile robot control system with plural mobile robots each of which moves along a predetermined route in the same area. One mobile robot gives way to the other mobile robot when the mobile robot receives a signal emitted by the other mobile robot. A mobile robot moving on a predetermined route has a sensor which senses whether or not an obstacle exists on the route. The sensor senses again after a predetermined time from the first sensing whether the sensor still detects the obstacle existing on the route at the first sensing.

Abstract: A camera capable of blurring correction includes an acceleration sensor detecting camera-shake amount, and a blurring correcting device correcting blurring of image on the basis of the sensor output. When a lens of the camera is driven for automatic focusing, the blurring is not corrected using an output of the acceleration sensor. Accordingly, blurring is not wrongly corrected.