Abstract: A valuable file identification device, comprising a housing; a hollow transparent drum; an annular clamping belt supported by at least two tension rollers and pressing against the transparent drum, the outer surface of the annular clamping belt and the outer surface of the transparent drum forming a clamping and conveying channel for the valuable file, and the length of the clamping and conveying channel being greater than that of the valuable file in the conveying direction; at least one information acquisition device, the information acquisition element of the information acquisition device being adjacent to the inner surface of the transparent drum, facing at least a part of the outer surface of the annular clamping belt, and being fixed relative to the side wall of the housing; and a power-driven device respectively driving the transparent drum and the annular clamping belt to move synchronously in opposite directions.

Abstract: In a state where a second power transmission path of transmitting power from the second planetary gear to the cam driving gear through the intermediate gear is selected, when the intermediate gear is opposed to the non-tooth portion for the release position of the cam driving gear, the rotation direction of the driving motor is changed to select a first power transmission path of directly transmitting power from the first planetary gear to the cam driving gear, the non-tooth portion for the release position deviates from the opposed position of the intermediate gear, and the rotation direction of the driving motor is changed again to select the second power transmission path.

Abstract: In a color misalignment detection method, an alignment pattern is obtained by designating a plurality of lines having line width and line intervals formed by superposing a line image of a black color as a reference color and a line image of a color other than the reference color, for example, a cyan line image, as one patch, and continuously forming these patches by shifting the relative position between the line images of the two colors by an optional quantity. An alignment pattern detection sensor has a light emitting diode and a photodiode. These elements are arranged along the scanning direction of the alignment pattern such that the photodiode can only receive diffused reflected light of reflected light from the alignment pattern. A spot shape of the light emitting diode and a spot shape of the photodiode are both formed in a square shape.

Abstract: An image reading apparatus is provided that can prevent image streaks due to dirt, stain or the like from being produced in an image of an original that is read while being conveyed. The image reading apparatus (A) includes an ADF (40) having a scanner unit (59) incorporated therein and comprised of a cylinder (60) having an outer peripheral surface thereof on which a plurality of read pixels (61) are arranged in a matrix. In reading an original (D), the scanner unit is rotatably driven in an original conveying direction at a circumferential speed approximately equal to an original conveying speed, and reads image information on the original passing through an image reading position (P1).

Abstract: In a reflective scanning optical system employing an imaging optical system having a curved mirror with a rotationally symmetrical reflecting surface configuration, the change in magnification of the imaging optical system in the auxiliary scanning direction is reduced and thereby the beam spot diameter on the scan target surface is equalized, as well as equalizing the scan line interval on the scan target surface when the system is applied to a multibeam scanning optical system. The imaging optical system of the reflective scanning optical system includes a curved mirror with a rotationally symmetrical reflecting surface and a lens having an anamorphic lens surface configuration on its one side. In the anamorphic lens surface configuration, slope and curvature of the line of intersection of the lens surface and a plane parallel to the auxiliary scanning cross section change independently of each other as the position in the main scanning direction changes.

Abstract: Various embodiments and methods relating to a scan area indicator are disclosed.

Abstract: An image reading device including (1) a transparent member having an image reading area, (2) a line sensor that moves in a line sensor moving direction, which is perpendicular to a reading line direction of the line sensor, (3) a first supporting structure that supports, at opposite ends of the image reading area in the line sensor moving direction, the transparent member such that the transparent member is not deformed with respect to the reading line direction when an external force is applied to the transparent member, and (4) a second supporting structure that supports, at opposite ends of the image reading area in the reading line direction, the transparent member such that the transparent member is movable between a first posture, where the transparent member is in a flat plate shape, and a second posture, where the transparent member is bent with respect to the line sensor moving direction.

Abstract: The invention relates to a device for controlling material comprising a sensor device and a lighting device, whereby the material which is to be controlled is guided on a transparent drum.

Abstract: A scanner is provided that has a light-beam emitter for emitting a light beam, a light-beam deflector for deflecting the light beam to scan a scanning surface, a photo-detector provided at a position outside an image-forming scanning range of the scanning surface to detect a scanning light beam before the scanning light beam starts generating a scanning line in the image-forming scanning range, a rotatable member located in front of an incident surface of the photo-detector and positioned in a recess formed on an outer surface of a housing. The rotatable member is rotatable about a rotational axis perpendicular to a plane defined by the scanning light beam by said deflector. The scanner also has an optical member provided on the rotatable member that allows the scanning light beam to pass therethrough to be incident upon the incident surface of the photo-detector, and a device for adjusting rotational position of said rotatable member about said rotational axis.

Abstract: Misidentification, when a sheet-form recording material of a size different from an identified size is conveyed and wound on a rotating drum, is detected before proceeding to exposure processing, which is a subsequent process. When a trailing end of a printing plate is detected by a photo-interrupter, an actual plate length is calculated on the basis of an already known conveyance length and either a rotation angle of the rotating drum due to the operation of winding up till this detection or a product of a rotation linear speed of the rotating drum and a duration of the operation. If a difference between the actual plate length and an inputted plate length falls beyond pre-specified tolerance values, the printing plate is wound backward and separated from the rotating drum.

Abstract: In a method and apparatus for point-by-point and line-by-line scanning of masters chucked on a scanner drum, for pixel-by-pixel illumination of the master, a light spot is generated with a light conductor, the light spot being imaged by a matching objective onto the master as an illumination spot. The scan light is focused with a scanner objective and is converted into an image signal in an opto-electronic scanner element. The illumination spot, scanner objective, and scanner element implement a feed motion in the direction of the rotational axis of the scanner drum for planar scanning of the master. Given employment of scanner drums having different diameters, the size of the illumination spot is corrected by a modification of the imaging scale of the light spot. The modification of the imaging scale occurs by displacing the light conductor with an actuating drive relative to the stationary matching objective. A corresponding focus correction occurs with a radial displacement of the scanner objective.

Abstract: An image scanner in which an original is scanned by a trilinear CCD array, i.e. the original is scanned line by line, three lines at the time, one line for each color. Thus, at a specific time “only” the area of the original that is scanned by the trilinear CCD array at that time has to be positioned in focus of the imaging means of the image scanner while the remaining part of the original may be positioned anywhere and may adopt any suitable form. Thus, there is no need for all parts of the original to be kept flat and planar as required in known flat bed scanners. The original is kept flat and straight along a line to be scanned by imparting a substantially cylindrical shape, such as a circular cylindrical shape, to at least part of the original. The original is scanned along lines that are substantially parallel to the generatrix of the cylindrical part of the original.

Abstract: An image recording system is disclosed. The system comprises a rotatable recording drum on which an image receiving sheet and plural kinds of image recording mediums are mounted, an optical head for recording image information by exposing a laser beam to the image recording mediums while moving in one-dimensional direction at a speed in proportion to the rotation speed of the recording drum, a characteristics input section in which characteristics of the image recording medium is previously inputted, a conversion table storage section in which there is previously stored a conversion table converting the characteristics of the image recording mediums into setup values of parameters with respect to the image recording, and a parameter control section changing the setup values of the parameters based on the conversion table stored in the conversion table storage section in accordance with the kind of the image recording medium.

Abstract: A processing time is reduced without using expensive hardware. A head reads images of originals which are contained in an i-th original photo film Fi all at one time as it moves in a subscanning direction and as an original drum rotates in a main scanning direction. At this stage, a switch connects the head to a first band memory and a switch connects a second band memory to an image processing circuit. During the reading of the images, image signals are stored in memory sectors of the first band memory original by original while image signals regarding an (i−1)-th original photo film (F(i−1)) are serially read, processed and stored in a magnetic disk original by original. When the head read images of an original photo film (F(i+1)) all at one time, the switches are switched each other so that writing in the second band memory and reading from the first band memory are performed simultaneously.

Abstract: A dual drum rotary image scanner has a headstock and a tailstock between which may be mounted drums of different diameter. The tailstock has substantially annular surfaces which contact corresponding surfaces on the different diameter drums. The different drums, when held in the scanner, each create a different separation between the headstock and tailstock. These different separations are detected by photodetectors, the outputs of which are received by a system controller. The controller uses the photodetector signals to control motors that position the scanning head and the transmittance illuminator relative to the surface of the particular drum mounted in the scanner. The motors turn pinions which, in turn, move racks to which are attached the scanning head and the transmittance illuminator, respectively. The movement of the scanning head also results in the modification of the optical path within the optics box of the scanner.

Abstract: An imaging system is provided for imaging media of differing widths while supported at an imaging position on a support surfaces. The system includes a loading device configured to move the medium to be imaged along the support surface to the imaging position. During loading, the leading edge of the medium, which extends across the medium width and substantially perpendicular to a direction of movement of the medium, moves in a direction towards a registration device. The registration device is contacted by the leading edge of the medium during loading so as to position the medium in the imaging position on the support surface. A drive mechanism is provided to move the regristration pin, typically prior to loading of the medium, to a position which corresponds to the particular width of the medium to be imaged.

Abstract: A rotary drum scanner comprises a rotatably mounted hub, a drum detachably mounted to the hub and an interlock mechanism which locks the hub against rotation until the drum is locked to the hub.

Abstract: An internal drum recorder images a media to a radiation pattern using an image array, which extends along a primary track, such as a helical track, and in a direction essentially perpendicular to the primary track. In one embodiment, the source of radiation is a laser aimed along the longitudinal axis of the drum, deflected and applied through a light modifier within a spinner. The light modifier is a device breaking the single laser beam into a number of sub-beams. Alternately, a number of laser diodes rotating within a translatable spinner may be used to produce the image. A gripper bar rotating about the longitudinal axis of the drum facilitates introducing and removing new sheets into the drum. A focus detector rotating within the spinneris used to correct the radial distance to the media surface from the spinner.

Abstract: A composite molded article including a polarizer of polycarbonate is provided which is excellent in impact resistance and allows for the manufacture of an eyesight-corrective polarizing lens for eyeglasses, and which comprises a protective layer 2 formed of an annealed or stretched polycarbonate material, a layer to be polished 4 including an untreated layer 6 formed of a polycarbonate material as injection-molded which is not annealed or stretched, and a polarizing film 3 which are superposed one on another in stack with the polarizing film 3 interposed between the protective layer 2 and the layer to be polished 4, the layer to be polished 4 being greater in thickness than the protective layer 2.

Abstract: An image forming apparatus includes a scan unit for scanning a light beam modulated based on an image signal in the main scan direction, and a drive unit for rotating an image carrier in the subscan direction of an image. The rotation period of the image carrier is set to be an integer multiple of the scan period in the main scan direction of the light beam by the scan unit.

Abstract: A film transparency (7) is held by centrifugal force with its emulsion side in contact with the inside of the transparent drum (1) of a rotary drum scanner (1, 2, 3) used in a graphic reproduction process. A transparency locator is in the form of either an insert (4) or a clip device (20) and serves to hold the film transparency in position until the drum is rotating at a sufficiently high speed.

Abstract: A scanner housing encloses a rotatable cylindrical drum, the outer surface having opposing rims or hubs which support respective outer edges of a film strip or slide to be scanned. The edges of the film are releasably held flat against respective rims by means of bands contacting respective radially outer edges of the film to maintain them against the respective outer rim surfaces of the drum whereby the film rotates with the drum's rotation past a scanner assembly. The scanner assembly is disposed internally of the housing adjacent one outer side of the drum and includes a linear array scanning transducer. A light source is located adjacent an opposing outer side of the drum at a location substantially diametrically opposed from the scanner assembly. A focusing lens assembly is disposed internally of the drum between the light source and the scanner assembly. The film being carried on the outer circumference of the rotating drum as the drum rotates, passes adjacent the light source.

Abstract: A compact rotary drum colour separation scanner includes a drum which is rotatably mounted about an upwardly extending axis which is preferably slightly inclined to the vertical. A part of the carriage carrying either a light source or reading head travels into the drum through the hub upon which the drum is mounted.

Abstract: A linear illuminator for image reading by the use of a linear sensor comprises a linear illumination light source, a cylindrical rotational member provided about the circumference of the linear illumination light source, and plurality of color separation filters installed on the rotational member. By controlling the rotation of the rotational member, plural kinds of color separation linear illumination light are output in the time series. The cylinder may have a shielding area between filters, which enables measurement of the dark current of the linear sensor.

Abstract: The invention provides a device for efficiently mounting an original onto an image reading drum in an image scanning system. The mounting device includes a lower holder section and an upper holder section, each made of a flexible but hard plastic sheet. The original is held in between the lower holder section and the upper holder section and is attached onto the image reading drum, which has a predetermined thickness greater than a distance causing Newton's rings. Accordingly, image signals obtained by scanning the original effectively represent an original image without Newton's rings.

Abstract: A focusing system for the optical head of a rotary drum scanner establishes focus quickly and automatically by iteratively scanning a line of a document on the drum and repeatedly adjusting the focus of the head in accordance with a focus optimizing function until the region of optimal focus is found.

Abstract: A scanner comprises apparatus for scanning an image in a series of scanlines with a beam. Beam splitters split the modulated beam into a number of subsidiary beams which are fed to respective detectors. In one example (FIG. 2), a set of masks are provided to divide the subsidiary beam spatially such that different portions of the beams are fed to respective detectors. In another example (FIG. 4 ), a color filter splits the modulated beam into its respective color components and, after this beam has been split into subsidiary beams, the individual color components are filtered by filters and fed to detectors.

Abstract: The light source assembly dimensions to be removably positioned within a standard scanning drum utilized in the graphic arts industry, the assembly having a housing containing a 5000K light source, the housing have a viewing lens secured to the housing, the viewing lens rotatable from a closed position to an open position, the closed position permitting the insertion of the light source assembly into the scanner drum and the open position expanding to the lens to approximate the circumference of the scanner drum, the lens being of a flexible diffused material, thereby providing a 5000K light source from within the scanner drum illuminating the transparencies to be examined and viewed which are on the outer circumference of the scanner drum.

Abstract: An improvement in the electronic imaging of documents, of the type wherein document sheets are transported at a uniform constant velocity past an electronic imaging member with the document sheet surface to be imaged maintained at a constant imaging distance from the electronic imaging member, wherein the document is fed through a document position and velocity holding and feeding nip formed between the outside wall of a rotatable transparent cylinder and an opposing nip forming member moving therewith, preferably an idler belt, and wherein the electronic imaging member is mounted inside the transparent cylinder to image this nip area through a narrow portion of the wall of the rotatable transparent cylinder and thereby to image scan only the narrow portion of the document which is being fed through and held in the nip.

Abstract: Apparatus for providing controllable scan rotation of the image representation of an original revolving in a drum scanner is disclosed, the apparatus having: illumination means defining an illuminated line segment parallel to the drum revolution axis on at least a portion of the revolving original; and a scanning head moving in parallel to the drum revolution axis in accordance with a predetermined pitch, the scanning head having: imaging apparatus for providing the image of said illuminated line segment; and deflection apparatus providing a scanning beam with a controllable sweeping motion along said illuminated line segment image so as to scan successive points of light thereon during revolution of the drum, the controllable sweeping motion being synchronized with the speed of the drum revolution so as to provide on the portion of the revolving original a locus of scanned points having an oblique angle with respect to the drum axis for rotating the image representation.