Abstract: A document reading device suitable for use for a personal computer, a facsimile, and a work station or the like, and comprises a reading means for reading the image information provided on a manuscript, a read controlling means for controlling the reading means in such a way that when the reading operation of the reading means is interrupted while reading said manuscript, a predetermined amount of the image information read by the reading means immediately before said interruption occurred, can be reread after the reading operation is restarted, and a processing means for processing both groups of the image information duplicately read by the reading means before and after the interruption thereof, respectively, by modifying them in such a way that a portion of the image information finally output and based upon the image information read by the reading means before the interruption, and another portion of the image information finally output and based upon the image information read by the reading means afte

Abstract: The present invention provides an ink jet printer wherein a service life of an ink jet recording head can be effectively utilized by exchanging ink cassettes to be mounted on the recording head. The printer comprises a first supporting mechanism for removably supporting the ink jet recording head, a second supporting mechanism for removably supporting the ink cassette accommodating ink to be supplied to the ink jet recording head, and a recording device provided in the printer or in the ink jet recording head mounted on the printer, for recording or storing the number of the ink cassettes applied to the ink jet recording head mounted on the printer. The present invention also provides an ink jet recording head and an ink cassette used with the above-mentioned ink jet printer.

Abstract: An image forming apparatus usable with a process cartridge having an improved positioning mechanism between the process cartridge and an optical system of the main assembly of the image forming apparatus. The process cartridge and the optical system are freely movable supported in the main assembly, and positioning portions of the process cartridge and the optical system are abutted to a positioning member fixed to the main assembly of the image forming apparatus.

Abstract: Disclosed is a sheet material feeding device which has a first row of sheet materials comprising a number of sheet materials moved in the direction of arrangement and provided in the form of a row and a second row of sheet materials disposed in proximity to the first row of sheet materials and which is for converging these two rows of sheet materials into a single row of sheet materials. Accelerating apparatus is disposed in the first row of sheet materials and at this position, a sheet material of the first row of sheet materials is moved at a higher speed than the succeeding sheet material to thereby enlarge the interval between the two sheet materials, and accelerating apparatus for feeding a sheet material of the second row of sheet materials into the enlarged interval is disposed in the second row of sheet materials.

Abstract: An apparatus for forming an image of an original includes an illumination source for illuminating an original, a photosensor for receiving light from the original illuminated by the illumination source and a cover for covering the back of the original. The cover has the rate of specular reflection not less than 60% but not more than 90%. The photosensor is so located that it receives the light scatteredly reflected by the original but not the light specularly reflected by the cover.

Abstract: The present invention provides a recording apparatus including a plurality of printers each for reproducing an image on a recording sheet upon receiving the same signal, and a single sheet delivering device for delivering recording sheets to the printers. The present invention also provides a recording apparatus including a plurality of printers each for reproducing an image on a recording sheet upon receiving the same signal, and a sheet discharge device for feeding the recording sheets from the printers to a collector or sorter.

Abstract: Disclosed is an original reading device in which, of first and second areas of the portion to be read of an original to be read which adjoin each other with a boundary therebetween, the first area is projected upon a first image pick-up element by a first lens and the second area is projected upon a second image pick-up element by a second lens, whereby the first area and the second area are read by the first element and the second element, respectively. The first and second lenses are disposed at positions corresponding to positions more toward the boundary between the first and second areas than the centers of the first and second areas.

Abstract: This invention relates to means of separating a copying paper from a sensitive body in an electronic copying machine, said means making it easy and sure to separate the former from the latter by controlling variably a voltage for removing electric charges by detecting variations of a differential current between the current flowing to an electrode of a charged device for copying, i.e. quantity of electric charges given to the copying paper and the current flowing to a shield case of the charged device.