Abstract: A compression tube attaching-detaching unit is provided with an arm, a connecting pin, and an attaching-detaching mechanism portion. The arm supports a compression tube. The attaching-detaching mechanism portion is removably coupled with the connecting pin to mount the arm on a radiographic fluoroscopic imaging apparatus. The connecting pin has a shaft portion and a flange portion positioned at the tip end of the shaft portion. The attaching-detaching mechanism portion includes a main body, a lid portion, a locking portion, and an unlocking portion.

Abstract: An assembly which is a composite including an end shield and a front wall. The size and shape of the end shield are adapted to the inner face of the front wall. Both parts are dimensioned and formed in such a way that they can be interconnected in a fixed manner to form a stable composite resembling a sandwich assembly. The joint surfaces between the front wall and the end shield lie on perpendicular planes and extend for some distance. The construction and connection of the individual parts and of the composite give the front region of the tumble dryer a high degree of rigidity, which obviates the need for additional reinforcement measures. The assembly thus saves material and mounting costs and resources.

Abstract: An automatic x-ray film feed uses a timer and relay system to automatically develop a multiplicity of film slides one-by-one in an x-ray processor without requiring a user to manually advance the slides after each slides in developed. The timer activates a motor through a relay system and the film feed advances a single slide into the processor with a motor and roller assembly. After the film leaves the magazine, a trip switch is triggered, shutting off the motor and halting advancement of the next slide in the magazine. The timer than reactivates the motor based on a pre-selected interval set on the timer, facilitating movement of the next undeveloped film slide in the magazine.

Abstract: A combined imaging plate scanning and erasing system, comprising: (a) a housing; (b) an imaging plate cassette infeed assembly positioned within the housing, the maging plate cassette infeed assembly comprising: (i) a mechanism to pull an imaging plate cassette into the housing; (ii) a mechanism to open the imaging plate cassette; and (iii) a mechanism to remove an imaging plate from the cassette; (c) a scanner positioned within the housing; (d) a curved path erasing assembly positioned between the imaging plate infeed assembly and the scanner; and (e) an imaging plate transportation assembly to move the imaging plate back and forth in a path extending from the imaging plate cassette, past the erasing assembly and through a scan area adjacent to the scanner.

Abstract: A radiographic silver halide film comprises a cubic grain silver halide emulsion layer on one side of the support and a tabular grain silver halide emulsion layer on the other side. The cubic grain silver halide emulsion layer comprises a combination of first and second spectral sensitizing dyes that provides a combined maximum J-aggregate absorption on the cubic silver halide grains of from about 540 to about 560 nm. The first spectral sensitizing dye is an anionic benzimidazole-benzoxazole carbocyanine, the second spectral sensitizing dye is an anionic oxycarbocyanine. The cubic grain silver halide emulsion layer also includes a mixture of gelatin or a gelatin derivative and a second hydrophilic binder other than gelatin or a gelatin derivative at a weight ratio of first to second hydrophilic binder of from about 2:1 to about 5:1. The cubic silver halide grains comprise from about 1 to about 20 mol % chloride and from about 0.25 to about 1.

Abstract: An automatic x-ray film feed uses a timer and relay system to automatically develop a multiplicity of film slides one-by-one in an x-ray processor without requiring a user to manually advance the slides after each slides in developed. The timer activates a motor through a relay system and the film feed advances a single slide into the processor with a motor and roller assembly. After the film leaves the magazine, a trip switch is triggered, shutting off the motor and halting advancement of the next slide in the magazine. The timer than reactivates the motor based on a pre-selected interval set on the timer, facilitating movement of the next undeveloped film slide in the magazine.

Abstract: The scanner includes a patient table having a table support and a moveable table top for receiving a patient. The scanner further includes a computer tomography (CT) imaging device for obtaining an image of a patient placed on the table top. The CT imaging device has an X-ray source and an X-ray detector mounted for rotation about an axis substantially parallel to the longitudinal direction of the table top, the table top being movable along this axis. Also included are a second conventional radiographic imaging device having a cassette for receiving a sheet of an x-ray sensitive material. The table top has a chamber for receiving the cassette of a length that is substantially equal to the length of the table top. Preferably, this chamber contains a trolley for carrying the cassette and a driving device for moving the trolley in the longitudinal direction of the table top over substantially the full length of the chamber.

Abstract: A direct-heated flat emitter for generating a homogenous electron beam, particularly for x-ray tubes, has two terminal lugs for the heating current supply formed at the edge of the perimeter of the emission surface and the emission surface is subdivided into interconnects by slits. The slits have a width no less than 10 .mu.m and no greater than 1% of the length of a diagonal of the smallest rectangle which can circumscribe the emission surface.

Abstract: A film treating apparatus has an apparatus body for executing the treatment of untreated film at a predetermined position, the apparatus body being capable of inserting thereinto and removing therefrom untreated film container containing untreated film therein. A film separating mechanism is provided in the apparatus body, the film separating mechanism taking out sheets of untreated film to be conveyed to the predetermined position one by one from the untreated film container. The film separating mechanism is insertable into and removable from the apparatus body in the same directions as the directions of insertion and removal of the untreated film container with respect to the apparatus body.

Abstract: A photographing device is provided with a pair of support members positioned in mutually opposed manner across a film, a sensitivity increasing screen mounted on at least one of the paired support members, a sealing member for hermetically sealing a space containing the film and the sensitivity increasing screen, a vacuum pump for reducing the pressure in the sealed space to maintain the film and the sensitivity increasing screen in mutual close contact, and a support member for maintaining the film in a predetermined position between the support member in the sealed space. Thus the sensitizing screen can be securely contacted with the film, and errors in operation are reduced even when the photographing operation is conducted with the film in vertical or inclined position.

Abstract: An x-ray target device for holding and positioning an x-ray film cassette in a radiological examination apparatus has a first assembly for the introduction or removal of a cassette into or out of a transfer region and a second assembly for holding for positioning the cassette sideways. A single drive is provided for operating both assemblies, with the driving connection between the single drive and the second assembly being disengaged when the second assembly is in the transfer region, but the driving connection is engaged otherwise. The second assembly carries a pair of gripping elements which are movable toward each other to grip the cassette therebetween. The second assembly is movable between the transfer region and an exposure region in the device. Another single drive is provided for moving the gripper elements and for moving the second assembly between the transfer and exposure regions.

Abstract: An x-ray examination apparatus has an x-ray radiator mounted on a radiator carrier, with an x-ray film cassette loading and positioning device arranged relative to the radiator carrier so that an x-ray film cassette can be loaded into the device at a position remote from the x-ray radiator, and can be conveyed by the device, after loading, to an exposure position disposed beneath the x-ray radiator.

Abstract: A collision preventive hood is provided for use with an x-ray film holder having removable film cassettes. Adequate collision protection is achieved by providing a collision preventive hood with side sections that can be folded back or slid inside when the film cassettes are removed.

Abstract: An imager apparatus for exposing a film with recorded images includes an exposure site, a primary film path along which unexposed films are fed to the exposure site, a secondary film path along which exposed films are taken away from the exposure site, and a film driver at the exposure site. The film driver drives films between the primary and the secondary film paths. The film driver includes at least a pair of cooperating driving wheels on opposite faces along only one side edge of the film to eliminate transmission rods.

Abstract: Disclosed is a film feeding mechanism for use during medical x-ray techniques, particularly angiography. Sheets of film are fed sequentially at high speed from a film magazine into a film exposure device, and then into a film receiving cassette, in a manner so as to reduce damage to the films, including the build-up and discharge of static charge on the films. In the film exposure device, a free-floating lower clamping assembly clamps each film against an upper clamping assembly from the center of the film progressively outward towards its leading and trailing ends, to eliminate wrinkling of the film. The upper clamping assembly is of thin construction so as to enable the locating of an object being x-rayed closely adjacent the x-ray film, to produce x-rays of exceptionally high resolution.

Abstract: In a film loading device, a plurality of supply magazines of different sizes are arranged horizontally one above the other. The removal sides of the supply magazines are staggered such that the largest supply magazine is arranged at the top of the device and each following, smaller supply magazine is staggered backwardly below. An endless conveyor belt with projections is arranged opposite to the removal sides of the supply magazines, said belt being in an inclined position corresponding to the inclination of the staggered arrangement of the magazines. The conveyor belt extends from the upper most supply magazine down to a cassette unloading and reloading station disposed below the supply magazines. At the side of the conveyor belt which faces away from the supply magazines, a drive and control device of the film-loading device is positioned.

Abstract: A dental film packet, comprises a film pack in a sealed envelope for intra-oral use for dental X-ray purposes. The envelope consists of a pair of thin pockets 21 and 22 of injection moulded plastics material, mating by means of tongues and cut-outs which may be held together and sealed by a band of adhesive tape. The envelope 20 has edges 29, 30 and corners 31 which are smoothly rounded so that the envelope 20 is devoid of any sharp edges. It will therefore generally cause the patient considerably less discomfort than the conventional form of packet. (FIG.

Abstract: An X-ray phototaking apparatus for effecting an X-ray phototaking operation on a sheet film, selected from plural kinds of sheet film in close contact, under a reduced pressure, with an intensifying member selected from of plural kinds of intensifying members, is provided with a device for detecting at least either the kind of the intensifying member and the kind of the sheet film, and a device for varying at least one of the contact time of the intensifying member and the sheet film, the X-ray irradiating conditions and the exposure control parameters, based on detection signals obtained from the detection.

Abstract: The invention set forth methods and apparatus for correcting the effect on image quality of a film processor having the steps of shielding a first portion along one edge of a film from x-ray energy and impressing, on the first portion, a first calibrated test pattern having a first calibrated graded stepwise density pattern made from visible light. A first plurality of symbols located adjacent the first pattern to indicate the magnitude of one of the density positions. Impressed along one edge of a control film, a second calibrated test pattern, which includes a second calibrated graded stepwise density pattern made from visible light. A second plurality of symbols are provided adjacent the second pattern to indicate the magnitude of one of the density positions. The performance of the film processor used to develop both films is measured and affected by comparing and noting the symbols associated with those density positions between the first and second test patterns.

Abstract: An x-ray film changer includes a removably mounted, passive-type cassette having no film driving mechanism and comprising a film-receiving spiral guide plate extending within the cassette in excess of one and one-half 360.degree. turns. The cassette further comprises an anvil bar for reverse bending of the guide plate when the cassette is opened, to facilitate film removal, a light-blocking gate which uncovers a film feed-in slot in response to mounting of the cassette on a film exposure device, and a combination carrying handle-latch mechanism.

Abstract: An X-ray radiograph apparatus comprises means for detecting a number of remaining unphotographed recording media retained in a recording-medium feed magazine, and display means for displaying the number of remaining unphotographed recording media detected by the detecting means with scales which change logarithmically and multiple display elements arranged in association with the scales.

Abstract: An X-ray radiographing system is provided with a table having a spot-film device which moves synchronously with an X-ray generator along a longitudinal axis (a patient's body axis) of the table. The spot-film device comprises a fluoroscopic area and a radiographic area arranged along a transverse axis at a front portion of the table. A film holder holding an X-ray sheet film (unexposed or exposed) shuttles along a transverse rail between the fluoroscopic area and a radiographic area. A feed magazine and a take-up magazine are provided under the fluoroscopic area. Unexposed X-ray sheet film is removed by suction cups from an opening in the feed magazine, and fed to the film holder. Exposed X-ray film is returned to the take-up magazine. Both the magazines can be loaded and unloaded from the front portion of the device.

Abstract: A sheet extracting mechanism is provided with a suction cup for attracting one of stacked sheets, a negative pressure source for supplying a suction force to the suction cup, a detector for detecting the pressure in the suction cup, a moving mechanism for moving the suction cup thereby extracting the sheet adhered to the suction cup by the section force, and a discriminator for comparing the suction force in the suction cup with a predetermined pressure, at a predetermined position located a predetermined distance from the bottom of the stack of sheets, thereby identifying the amount of the stacked sheets. The suction cup is temporarily stopped at the predetermined position corresponding to a predetermined number of remaining sheets, and the remaining number of sheets is identified equal to or less than the predetermined number when the suction cup no longer touches the sheet, thereby becoming unable to attract the sheet.

Abstract: A trayless film cassette transport apparatus is disclosed which includes an improved cassette gripping system which allows an x-ray film cassette to be loaded through a window; then gripped and withdrawn inwardly to a properly centered exposure position; then ejected to project partially from the window by a distance switch is automatically determined in accordance with the size of the cassette. This ensures that small cassettes project far enough from the window to be readily grasped by an operator while avoiding ejecting large cassettes so far that they are precariously balanced in the window. The novel gripper holds the cassette securely under a self-locking condition, such that the gripping force on the cassette increases in response to and at a greater rate than an improperly imposed cassette withdrawing force.

Abstract: A supply magazine receives a package having a stack of film sheets within a light-tight bag. When the magazine is closed, a the bag is driven from the magazine so that the sheets can be removed for exposure and development. The bag is removed at the rear end of the magazine and fed toward the front of the magazine so that it is accessible to the operator and to avoid having the bag fall into an associated printer/processor and out of the reach of the operator.

Abstract: In an X-ray equipment, a photographing program including a plurality of photographic formats is stored in advance. Program photographing is performed in accordance with the photographic formats read out in a predetermined order. When an interrupt signal is input during program photographing, a read operation of the photographic formats is temporarily interrupted, and photographing is performed in accordance with a newly input photographic format. In addition, when a skip signal is input during program photographing, the read out photographic format is cancelled, and program photographing is performed in accordance with the next photographic format.

Abstract: Disclosed is a film feeding mechanism for use during medical x-ray techniques, particularly angiography. Sheets of film are fed sequentially at high speed from a film magazine into a film exposure device, and then into a film receiving cassette, in a manner so as to reduce damage to the films, including the build-up and discharge of static charge on the films. In the film exposure device, a free-floating lower clamping assembly clamps each film against an upper clamping assembly from the center of the film progressively outward towards its leading and trailing ends, to eliminate wrinkling of the film. The upper clamping assembly is of thin construction so as to enable the locating of an object being x-rayed closely adjacent the x-ray film, to produce x-rays of exceptionally high resolution.

Abstract: This invention relates to an x-ray film holder for intra-oral photographing, comprising a holder head (2) with three slots (10, 11, 12) intended to hold films in different positions and to be inserted in the mouth-cavity of the patient with a film in any of the said slots, and a handle (1) comprising at least a substantially flat bite portion, so that the occlusion plane will be lying on each side of said flat portion. The three slots in the holder head consist of a first slot (10) for a lying film (FIG. 2A) for so called bite-wing exposure, where crowns as well as the border portion of the bone in one of both the jaws are visible on the developed picture, a second slot (11) for an upraised film (FIG. 2B) for so called upraised bite-wing exposure, where crowns as well as the border portion of the bone in both the jaws are visible on the developed picture, and a third slot (12) for so called apical pictures (FIG.

Abstract: An x-ray film changer includes a removably mounted, passive-type cassette having no film driving mechanism and comprising a film-receiving spiral guide plate extending within the cassette in excess of one and one-half 360.degree. turns. The cassette further comprises an anvil bar for reverse bending of the guide plate when the cassette is opened, to facilitate film removal, a light-blocking gate which uncovers a film feed-in slot in response to mounting of the cassette on a film exposure device, and a combination carrying handle-latch mechanism.

Abstract: An x-ray film magazine has a housing and a cover which in combination form an interior volume having an approximately C-shaped cross section, which receives a number of sheets of x-ray film in a stack made to conform to the C-shaped cross section. A foil is provided in the interior of the magazine having one end rigidly connected to a base of the housing, and an opposite end being resiliently connected to the cover of the magazine. The foil at least partially supports a bottom-most or lowest sheet of the stack of x-ray film sheets, and due to the resilient mounting of the foil, always presents the uppermost sheet in the stack of film sheets to be presented in a position which permits the uppermost sheet to be reliably conveyed out of the magazine to an exposure position in an exposure component adjacent the film magazine.

Abstract: An X-ray examination apparatus includes a device for positioning an X-ray film changer with respect to an image intensifier away from a position in front of the image intensifier for producing X-ray images to a position on a side of the image intensifier when not in use. The device combines a rotational and shifting movement so that the film changer can be positioned on the side of the image intensifier very close to the same without impeding access to a patient.

Abstract: An exposure unit for a film changer includes a fastening arrangement for upper and lower platens which are movable relative to one another so that film is introduceable therebetween when in one position and so that the film is pressed between the platens when the platens are in another position. The fastening arrangements of at least the upper platen are resiliently formed to insure parallelism between the lower platen and the upper platen during exposure of the film when the platens press against the film.

Abstract: X-ray intensifying screens that can be conveniently and easily used in book cassettes and automatic changer systems are described. These screens have an improved surface made by bonding a thin, clear, transparent, tough, flexible, dimensionally stable polyamide film thereon. The screens display a very low average dynamic coefficient of friction, very good resistant to wear (e.g., gouging and abrasion) and a low static susceptibly which permits long term use in book cassettes and rapid handling incurred in said changer systems.

Abstract: A radiation diagnostic device wherein different kinds of picture image record media can be used and the performance is improved. The radiation diagnostic device which includes a photographing station in which radiograph information of an object for inspection is irradiated upon a picture image record medium to make radiation photographing of the object for inspection comprises a first storing station for storing therein first and second different picture image record media, a first transporting system for alternatively taking out one of first and second picture image record media from the first storing station and transporting the same to the photographing station, a second storing station for storing therein first and second picture image record media after photographing, and a second transporting system for transporting a first or second picture image record medium after photographing from the photographing station to the second storing station.

Abstract: A light shield for an x-ray film sheet cassette is provided with increased flexibility in its end portions to prevent bowing of the shield when it is subjected to abnormal forces in its center portion. This is accomplished by notching the front lip of the light shield in the end portions of the shield.

Abstract: An X-ray apparatus includes a film cassette which is displaceable in a carriage in the loading direction, a device for fixing the cassette position perpendicularly to the loading direction, two pairs of guide rollers which are offset with respect to one another in the loading direction and which are mounted on the carriage and on the apparatus, respectively, and independently controlled motor drives which act on the film cassette by way of a traction means guided via the rollers, the traction means sections between the rollers on the carriage and the rollers on the apparatus extending parallel to one another.

Abstract: A lighttight box, for automatically delivering a photosensitive sheet of photographic film to an exposure station, includes a lid movable between a first lighttight position and a second box-opening posiiton. A clamshell film-carrying mechanism, connected to the lid, is mounted for movement (1) from a closed position internal to the box when the lid is in its lighttight position, to (2) an open film-delivery position external to the box when the lid is in its box-opening position.

Abstract: A programmable X-ray film changer for use, for example, in making angiograms, is provided with an improved pressure plate mechanism, feed and removal mechanism, photographic plate indexing mechanism, a clutched single cycle drive mechanism, a receiving photographic plate cassette and control methodology. The improvements in combination permit a substantial reduction of the number of parts in the film changer resulting in increased reliability, a decrease in the expense of manufacture, and decreased weight. Furthermore, the X-ray photographic film changer is arbitrarily orientable in space and independent of gravity feed mechanisms or the interference of gravity with respect to its operation. The improved pressure plate is normally substantially flat and is bowed to form a convex surface by a pressure plate bowing mechanism. Misfeeds of multiple numbers of photographic plates are thus tolerated by the natural resiliency of the pressure plate.

Abstract: A film feeder of a cassettes X-ray photographic apparatus comprises a plurality of suction cups capable of attracting unexposed film in a first and second magazines receiving unexposed film of different sizes, first guide path for guiding the cups between the first magazine and a feed mechanism which feeds unexposed film to a holder section, a second guide path for guiding the cups between the second magazine and feed mechanism, and a drive control mechanism for moving the cups attracting unexposed film from the first and second magazine to the holder along the first and second guide path selected optionally. The cups are moved in a vertical, slant and horizontal direction by the drive control mechanism.

Abstract: A lighttight box includes a lid movable between a first lighttight position and a second box-opening position. A clamshell film-carrying mechanism, connected to the lid, is mounted for movement (1) for a retracted position internal to the box when the lid is in its lighttight position, to (2) an extracted film-delivery position external to the box when the lid is in its box-opening position. Actuator apparatus includes a lift mechanism, attachable to the lid when the box is in a parked film-delivery position relative to a workstation, movable between a rest position in which the lid is held in its closed position, and an actuated position in which the lid is held in its box-opening position. A motor, coupled to the lift mechanism, serves for driving the lift mechanism between its rest and actuated positions.

Abstract: Disclosed is a film feeding mechanism for use during medical x-ray techniques, particularly angiography. Sheets of film are fed sequentially at high speed into and out of a film exposure device, by a feed mechanism including continuously driven feed wheels and movable pinch rollers, in a manner so as to reduce damage to the films, including the build-up and discharge of static charge on the films. In the film exposure device, a free-floating lower clamping assembly, having a natural substantially flat configuration, clamps each film against an upper clamping assembly from the center of the film progressively outward towards its leading and trailing ends, to eliminate wrinkling of the film. A firing command is transmitted to an X-ray generator before each unexposed sheet of film reaches the exposure position and each cycle of operation is accomplished by energizing a single revolution clutch connectable to a continuously running, constant speed motor.

Abstract: A method of checking the presence or absence of an X-ray sheet film in a cassette inserted into an automatic film unloading or loading apparatus, utilizes a proximity sensor arranged in the apparatus to sense position changes of a sheet film supporting foil which is arranged for a limited movement in the cassette. The proximity sensor is connected to an electronic control device which controls the operational sequence of the unloading and loading apparatus. When the gripping member preferably in the form of a suction cup seizes a sheet film on the supporting means in the cassette, the supporting means remain in its rest position after the sheet film is removed. However, if no film is present on the supporting means, the suction cup seizes the supporting means and displaces the same from its rest position. This change is sensed by the sensor and a signal is delivered to the electronic control circuit which modifies the operational sequence accordingly.

Abstract: A film handling system which permits industrial X-rays to be made on site comprises a film cassette having an area for a supply of film and an exposure area and the cassette after exposure of a film is placed in the throat of a processor. Upon placing the cassette in the throat of the processor a rack and pinion dispenses an exposed film from the cassette and upon removal of the cassette a film is moved from the storage area to the exposure area. The exposed film is processed in the processor.

Abstract: X-ray film feeding magazine usable in a film handling automatic apparatus, comprising a tray (3) in which is defined a housing (26) to receive an x-ray film packet (F). The film housing is delimited by a front gauge (17) and at least a side gauge (28) which can be shifted between a stand-by position and a work position to reduce the housing dimensions to prearranged values. The shifting of said movable front and side gauges from the stand-by to the work position is controlled by means of contrast elements (15) which are associated with the front gauge and accessible from the outside to apply an external thrust to the front and side gauges.

Abstract: An X-ray radiography apparatus having a supply magazine, a film-removing unit, an X-ray imaging unit, a reference position detector, a suction detector, a distance detector, a discriminator, and a display unit. The supply magazine contains a stack of unexposed films. The reference position detector detects when the suction unit passes a reference position located above the supply magazine. The suction detector detects when a sheet film has been attracted to the suction unit. The distance detector detects the distance the suction unit has moved vertically, from the outputs of the reference position detector and the suction detector. This distance is equal to the distance between the reference position and the topmost unexposed film stored in the magazine. The discriminator determines the number of unexposed films remaining in the supply vessel from the distance detected by the distance detector.

Abstract: A radiation photographing and reading apparatus according to the present invention is provided with transfer conveyors for automatically transferring reusable radiation image converting plates from a photographing housing as a movable member of a radiation photographing device to a fixed housing of a reading device. When each exposed radiation image converting plate is transferred by the transfer conveyors, the photographing housing and the fixed housing are connected by means of a shielding coupling, whereby a transfer passage between the two housings is shielded from light.

Abstract: A programmable X-ray film changer for use, for example, in making angiograms, is provided with an improved pressure plate mechanism, feed and removal mechanism, photographic plate indexing mechanism, a clutched single cycle drive mechanism, a receiving photographic plate cassette and control methodology. The improvements in combination permit a substantial reduction of the number of parts in the film changer resulting in increased reliability, a decrease in the expense of manufacture, and decreased weight. Furthermore, the X-ray photographic film changer is arbitrarily orientable in space and independent of gravity feed mechanisms or the interference of gravity with respect to its operation. The improved pressure plate is normally substantially flat and is bowed to form a convex surface by a pressure plate bowing mechanism. Misfeeds of multiple numbers of photographic plates are thus tolerated by the natural resiliency of the pressure plate.

Abstract: A plain film platform for projection screen apparatus for X-ray apparatus has a platform member, a first fixed guiding strip for a film extending along one vertical side, a second fixed guiding strip extending along a lower side near the opposite vertical side over a small part of the platform member, and a third movable guiding strip extending between the first and second guiding strips and displaceable parallel to the lower second guiding strip.

Abstract: An apparatus for scanning a sheet-shaped recording medium comprises a conveyance system provided with a conveying roller and a plurality of nip rollers for conveying the recording medium in co-operation with the conveying roller, and a scanning optical system for scanning the conveyed recording medium by a light beam in a scanning direction normal to the conveyance direction. One of the conveying roller and the nip rollers is fabricated as edge rollers contacting the other of said conveying roller and said nip rollers only near both end portions of the other. The scanning optical system is positioned on the side of the edge rollers.

Abstract: An X-ray film holder which permits optional fluoroscopic or radiographic examination of a patient has a number of screen foils disposed in a film conveying track wherein X-ray film is provided between a supply magazine and a take-up magazine. The film changer is disposed between the patient and an X-ray image intensifier, the changer and the intensifier having the same image axis. The film changer has a conveyor unit for moving the screen foils into place in front of the image intensifier and for automatically opening overlapping flaps of the screen to permit an X-ray film sheet to be moved therebetween. As needed, the screen foils can be conveyed in an opposite direction to a storage area to permit radiation to pass unobstructed to the image intensifier for fluoroscopic examination of the patient.