Abstract: A data card recording system having a rotatable drum for supporting a plurality of data cards on its circumferential surface. A light source emits a beam which is modulated in response to data and directed to the cards on the rotating drum. The beam produces data spots in a plurality of parallel tracks aligned in the direction of drum rotation on a recording strip whose length is parallel to the drum axis. The focusing optics may be moved transversely to record in adjacent tracks. A data segment accessed from a data source and stored in a register of a microprocessor is recorded on a track on each card on the drum. A data control, controlling modulation rate, and a position detector unit are provided to synchronize the light beam modulation with the drum rotation rate. Drums and optical system embodiments are described for both reflectively and transmissively read data cards.

Abstract: A sheet clamping system for high speed rotatable drums is provided in which light-weight clamping bars, formed of relatively thin metal sheet stock, are configured and/or oriented for maximum resistance to deflection radially of the axis of drum rotation as well as positively secured in a sheet medium clamping position at axially spaced intervals along the length of the drum. The system further includes centrifugally actuated, axially extending rods positioned to underlie the operative portion of each clamping bar in a manner such that leading and trailing edges of a retained sheet are sandwiched between the rods and the clamping bars under a clamping force generally proportional to the square of drum rotational speeds.

Abstract: An optical information carrier includes a cylinder (1) with a recording layer (2) and bushings (3,4) located at butt ends of the hollow cylinder (1) and insulating the recording layer (2) from the environment. A method for erasing information recorded on the optical carrier uses a high-frequency electrical discharge is produced inside the air-tight closed space (5) of the hollow cylinder (1). An optical storage device realizing the method includes an erasing unit (11) having a circuit for initiating a high-frequency discharge, which has electrodes (12,13) between which the optical carrier (10) is located so that the high-frequency discharge is initiated inside the closed air-tight space (5).

Abstract: An automatic document feeder including an automatic sheet winding device and an exposure device. The automatic sheet winding device includes a rotary drum and a sheet clamping device for clamping the original sheet wound around a circumferential face of the rotary drum such that a sheet clamping region and an exposure region on the circumferential face of the rotary drum are circumferentially spaced from each other.

Abstract: Disclosure is made of an optical memory wherein a cylindrical information carrier (2) is disposed in a stationary cylindrical container (14) filled with a liquid or gaseous medium transparent for the radiation flux emitted by a source (1) of modulated coherent radiation. The cylindrical information carrier (2) is equipped with a rotational drive. A recording coating (12) is applied on a tubular base (11) of the cylindrical information carrier (2). The cylindrical information carrier (2) is optically connected with the source (1) of modulated coherent radiation and with an addressing unit (3) arranged so that its optical elements can move axially with respect to the cylindrical information carrier (2).

Abstract: A data card recording system having a rotatable drum for supporting a plurality of data cards on its circumferential surface. A laser light source emits a beam which is modulated in response to data and directed to the cards on the rotating drum. The beam produces data spots in a plurality of parallel tracks aligned in the direction of drum rotation. The focussing optics may be moved transversely to record in adjacent tracks. A data segment accessed from a data source and stored in a register of a microprocessor is recorded on a track on each card on the drum. A data control, controlling modulation rate, and a position detector unit are provided to synchronize the light beam modulation with the drum rotation rate. Drums and optical system embodiments are described for both reflectively and transmissively read data cards.

Abstract: A sheet clamping apparatus for a thermal printer drum includes a clamping lever mounted in a recess of the drum, fixed cam members, and a mechanism mounted on an end surface of the drum and connected to the clamping lever and operatively associated with the cam members for moving the lever between open sheet receiving and ejecting positions and a closed sheet clamping position as the drum rotates.

Abstract: An ink jet printing system has a low aspect ratio cylindrical drum adapted to support a sheet of material to be printed by a computer controlled printing head of a plurality of pigmented inks. The drum is preferably of approximately the same diameter as its axial length, is made up of at least two spoked wheel assemblies consisting of several arcuate wheel segment subassemblies that are joined together and held in place by a corregated skin covered with a fiberglass layup to provide a smooth cylindrical surface onto which the sheet material is spread. A clamping device is provided for tensioning the sheet material as it is rotated past a carriage carrying the printing head and affording two relative movement directions as between the printing head and the sheet to be printed for these differently colored printing inks.

Abstract: Disclosure is made of an optical storage device wherein a cylindrical information carrier (2) with a recording medium (12) applied on a tubular base (9) is disposed in a stationary cylindrical container (3) having a window (4) in the lateral wall thereof. A lens (5) is secured in the window (4) of the cylindrical container (3) to let through the radiation flux from a source (1) of modulated coherent radiation. The cylindrical container (3) is filled with a liquid or gaseous medium transparent for the radiation flux. The length of this cylindrical container (3) is at least twice as long as that of the recording coating (12) applied on the tubular base (9) of the cylindrical information carrier (2) equipped with drives for rotation and axial motion.

Abstract: An image recording apparatus has a feed system for feeding a recording sheet from a feed magazine to a drum, a drum system for winding the recording sheet therearound and rotating to align the recording position with a predetermined position on the circumferential surface of the drum, a scanning system for main-scanning the recording sheet at the recording position of the sheet with an optically modulated beam, and a storage system for storing the recording sheet on which an image has been formed. The drum is rotated in opposite directions during feed and storage of the sheet.

Abstract: An ink jet printer with a continuous supply of sheet material from a spool contained within an imaging drum. The sheet material is withdrawn from the interior of the drum by a pair of rollers carried by the drum and removably connected to an external drive system. The sheet material travels around the drum and is held by the rollers in that position. The external drive system is then disconnected allowing the drum to rotate while a printing head scans the surface of the sheet material to produce the desired image. After the imaging process, the drum is stopped in a predetermined position and the rollers connected to the external drive. The rollers are then driven to eject the imaged sheet material while a fresh supply is withdrawn from the interior of the drum and wrapped around its outer surface.

Abstract: According to the recording apparatus of the present invention, recording papers are wound by the winding member while the end portions of the recording papers are tightly held. The recording papers can therefore be correctly reciprocated. Furthermore, before recording is effected by the recording head, the recording papers are one wound back by the winding member to an initial position, thereby removing strains or deflections of the recording papers. Also, in the case of a color printer of thermal transcription, images in each of the four colors can be accurately overlapped without disagreement.

Abstract: For requirements where constant velocity is important and positional error must be small and non-cumulative, a bipolar or unipolar, two-phase, permanent magnet stepper motor is driven by sawtooth currents in such manner as to produce a rotating magnetic field that exerts a substantially constant torque on the rotor. When using a bipolar stepper motor with windings electrically offset by 90.degree., two drive currents are generated that increase and decrease in amplitude linearly between predetermined maximum and minimum values. With a unipolar motor, four sawtooth waveforms, of single polarity, are provided. In either case, the currents are displaced by 90.degree. to produce a rotating magnetic field of uniform amplitude.A microprocessor controls the generation of a number of voltage ramps that control current generators for either the bipolar or unipolar stepper motor.

Abstract: Disclosed is an apparatus for wrapping paper on a cylindrical drum for use in a recording or reading system. The apparatus includes a roller for pressing the paper wrapped on the cylindrical drum. The roller is disposed in the vicinity of the cylindrical drum and in parallel to the axis of the cylindrical drum and is supported by a pair of roller-supporting plates disposed facing each other. Also included is a connecting rod disposed in parallel to the roller. The connecting rod penetrates a through-hole made in a substantial center portion of each of the roller-supporting plates and is supported by a pair of rod-supporting plates disposed outwardly with respect to the pair of roller-supporting plates. A lever is mounted on an end of at least one of the roller-supporting plates, which end is opposite to the other end where the roller is supported, so that the roller is rotatable about the axis of the connecting rod with the operation of the lever.

Abstract: An ink-jet printer including an ink jet nozzle for ejecting ink droplets onto the recording paper which is moved relative to the nozzle so that dots of ink are printed in the form of a pattern. The trajectory of flying ink droplets is deflected along the direction of the relative movement under control based on the measurement of the relative movement speed.

Abstract: A printer which utilizes a charge controlled ink jet head is disclosed. A platen and its surrounding parts will be marred if the ink jet head is operated when there is no paper around the platen. Thus, the detection of a paper is of importance, and accordingly, a paper sensor is disposed near the platen. To prevent the sensor from being contaminated by the ink, the paper sensor is disposed rearward of the platen, as viewed from the ink jet head. The presence or absence of a record paper in front of the ink jet head is determined by a microprocessor which responds to a detection signal from the paper sensor and the amount of rotation which the platen has undergone since the detection of a paper by the sensor. If the printing operation is in pause over a given time interval at the end thereof or after the initiation of the projection of an ink jet, the projection of the ink jet is interrupted in order to reduce evaporation of solvent from the ink.

Abstract: A method of rolling a photosensitive film on a drum wherein the film is wound on the drum being held at the seam by a double-sided adhesive band and then heat shrunk into a smooth surface on the drum.

Abstract: A drum type image scanning and recording apparatus, with a drum around whose cylindrical external surface a film is fixedly wrapped and a drum-driving apparatus mechanically coupled to the drum for rotating the drum, has a string tensionally stretched nearby and along the external surface of the drum in parallel with the drum axis by a string stretching device. A swing detecting device detects the swing of the string produced when part of the film and the string are in contact with each other, as when the drum is rotating and the film separates away from the drum external surface. The rotation of the drum is stopped in response to an abnormality detection signal from the swing detecting device, thus precluding significant physical separation of the film from the drum.

Abstract: A printer is used for printing the output of an electronic balance, for example, having a printing roller as a component of a printing unit. The printing roller is adapted to be driven by a motor and to feed the printing sheet by its own rotation when a printing head presses the printing sheet against the printing roller and impresses a given print on the printing sheet.

Abstract: An apparatus for generating a trigger signal having pulses synchronized with selectable angular displacement of a rotating object. The apparatus comprises a position encoder to monitor the rotation of the rotating object and to produce M output signal pulses during each revolution of the object, a frequency multiplier coupled to generate an output signal having a frequency N times the frequency of the position encoder output signal, and a frequency divider coupled to generate a pulsed trigger signal of frequency 1/Mth of the frequency of the frequency multiplier output signal, N being a selected integer and M normally being fixed by the physical contruction. The trigger signal comprises N pulses per revolution of the object and the angular displacement of the rotating object associated with each pulse of the trigger signal is selected by appropriate adjustment of N.

Abstract: The present invention relates to a recording paper winding apparatus for winding a recording paper on a rotary drum, by providing a bar for pinching a front end of a recording paper between the bar and the outer surface of a rotary drum, whereon a recording paper is to be sucked by making inside a negative pressure. Thus, the recording paper can be wound on the drum by a simple operation and held tightly thereon.

Abstract: A recorder contains a rotatably mounted drum which is structured as a vacuum or negative pressure-hollow cylinder. At the cylindrical circumferential surface of the drum body there is arranged at least one clamping or supporting region for the retention of a sheet-shaped record carrier or medium, each clamping or supporting region containing a closed channel system. Each individual channel system comprises a number of channels of a first group of channels which are arranged in the lengthwise axial direction of the drum and essentially parallel to a clamping portion and a number of channels of a second group of channels arranged essentially transversely with respect to the first group of channels. In order to obtain a stable smooth contact or support of the record carrier or medium at the drum there is provided in the last channel of the related clamping or supporting region, which is arranged parallel to the clamping portion, an opening which penetrates through the drum body.

Abstract: A paper guiding device and operating method for use in an office writing machine, the device including a platen carried by a shaft and constituting a paper support, the platen shaft and platen being rotatable in a first direction for insertion of a paper sheet in the machine and in a second direction opposite to the first direction, a paper holding rail disposed adjacent the platen and carrying a plurality of pressure rollers which are pressed toward the platen, a rocker member supporting the rail and mounted to undergo pivotal movement about the axis of rotation of the platen shaft between a paper insertion position and a normal printing position; and a coupling member coupling the rocker member and platen such that rotation of the platen in the second direction effects pivotal movement of the rocker member into the paper insertion position for insertion of the leading edge of a paper sheet between the rollers and the platen and rotation of the platen in the first direction effects pivotal movement of the ro

Abstract: Apparatus for thermally printing images, such as color images, on a print medium. The medium is moved repeatedly from a reference position through a printing region, as by rotating the medium on a platen. Thermal print elements are disposed at the print region and are selectively energizable to cause images, such as color images, to be printed. A movable web of thermally transferable material has a run interposed between the print medium and the thermal elements at the print region. In one embodiment, the web is provided with successive frames of respectively different colors of thermally transferable material arranged in repeated sequence. Energizing signals are supplied to the thermal elements representative of the image to be printed; and an image is printed in a color corresponding to the color frame then disposed at the printing region. Successive passes of the print medium are made in order to print images of the remaining colors in the sequence of frames on the web.

Abstract: A heat-sensitive printer is provided with an apparatus for effecting the stoppage of a travelling ink donor sheet as soon as a recording sheet can be separated therefrom of the printing, in order to economize the consumption of the donor sheet.

Abstract: A low inertia plotter having a carrier consisting solely of a relatively thin sheet of support material defining a surface for carrying a sheet of plotting media and supported by an air bearing for movement in one coordinate direction relative to a frame and a plotting instrument supported on the frame for movement in another coordinate direction and in plotting relation to the plotting media. The carrier and the plotting instrument are driven in response to command signals received from a controller.

Abstract: An electrostatic recording member comprising a recording layer, an electrically conductive layer and a support, wherein the electrically conductive layer is composed of from 2 to 40 parts by weight of electrically conductive micro-fine powder dispersed in from 60 to 98 parts by weight of an organic polymer binder, and has a surface resistivity of 10.sup.6 to 10.sup.8 Ohms.

Abstract: A sheet clamping device is provided which is used to clamp both the leading and the trailing end of a sheet while the sheet is being disposed around the peripheral surface of a drum rotating in a given direction. The drum is provided with a front and a rear claw which are adapted to clamp the leading and the trailing end of the sheet, respectively, and which are urged to bear against the peripheral surface of the drum. The claws are operated to open or close in response to respective claw operating means. After a sheet has its leading end clamped to the drum surface by means of the front claw, combing urges the sheet against the drum surface while combing it, and the trailing end of the sheet is clamped to the drum by means of the rear claw.

Abstract: A facsimile transceiver unit utilizing a drum wherein a drum gripper bar grips an edge of a sheet to be scanned during system operation. On termination of operation, the drum direction is reversed allowing the beam strength of the scanned sheet to lift the free edge of the sheet off the drum. The sheet is then picked off by a suitable member and directed out of the facsimile transceiver unit. At the same time, the gripper bar is opened releasing the sheet for easy operator removal. In a preferred method, the sheet is bumped by the raised gripper bar to ensure release of the sheet from the facsimile transceiver unit.

Abstract: A facsimile system has improved features for receiving copy medium and for printing. The system has a cylindrical rotatably driven drum that has an expansion device that allows the drum to expand its effective diameter. When the unit is used as a receiver, a cylindrical loop of copy medium is inserted over the drum, when the drum is in its reduced diameter position. Then the expansion device is actuated to enlarge the diameter and tightly constrain the copy medium. The same device may be used to transmit, since the expansion device utilizes a slot formed along the periphery of the drum. The slot opens to receive the edge of an original document when the expansion device is in the reduced diameter position. The slot closes to retain the document when the expansion device is rotated to the enlarged diameter position. The printing is accomplished by a solenoid actuated hammer that presses a ribbon against the copy medium while the drum rotates.

Abstract: Disclosed herein is a facsimile apparatus with an improved sheet transport means including a transport path and a feeder in the path for moving sheets along it to a scanner. A sensor is situated in the path for sensing the length of the sheets being fed to the scanner. The sensor is utilized for detecting the length of the document such that it may be removed from the scanner by engaging the trailing edge of the sheet.

Abstract: A recording medium is directed onto a cyclically moving support cylinder and information is recorded on the recording medium as it is sucked onto the support cylinder, whereafter upon termination of the recording, the suction force is controlled to permit the recording medium to be discharged out of the circulatory moving path of the support cylinder.

Abstract: A recording laser beam is modulated by an acousto-optic modulator with input image signals. The modulated laser beam expanded by a lens system impinges upon a light beam deflector. The light beam deflector includes a plurality of mirror surfaces in the form of a polygonal pyramid. A plurality of photosensitive recording media are supported on the inner surface of a cylindrical support member. The light beam deflector is located within the cylindrical support member for rotation about and sliding movement along the longitudinal axis of the cylindrical support member. The modulated and expanded laser beam impinges upon the light beam deflector at the apex of the polygonal pyramid at an angle parallel to the axis of the pyramid and divided into a plurality of light beams outwardly reflected by the mirror surfaces in a plurality of radial directions. The reflected light beams are focussed on the respective photosensitive recording media on the inner surface of the cylindrical support member.

Abstract: Image signals received by a facsimile receiver are stored in a scan converter. The scan converter repeatedly reads out the stored image signals and supplies them to an acousto-optic modulator. The acousto-optic modulator modulates a recording laser beam with the supplied image signals. The modulated laser beam is deflected by a deflector to scan a photosensitive recording medium to record an image thereon. The scan converter first reads out a first part of the stored image signals corresponding to the first scan line. After the first part of the stored image signals has been recorded on one photosensitive recording medium, the scan converter again reads out the same part of the stored image signals and the laser beam modulated with the same image signals is caused to scan another photosensitive recording medium.

Abstract: A facsimile device of a type having a rotary drum and clamping bars movable toward and away from the drum surface to cooperate, when moved toward the drum surface, together with the drum surface in clamping therebetween the leading and trailing ends of a sheet. The device has a combination of electric and mechanical means adapted to control the movements of the first and the second clamping bars in response to the manual opening and closing action of a manually operable drum cover or the like member, such that, as the drum cover or the like is moved to the closing position, the sheet placed at a predetermined position is automatically picked up and wound around the drum and, as the drum cover or the like member is moved to the opening position, the sheet is automatically released and returned to the predetermined position.

Abstract: A low inertia rotary drum transport for flexible sheets, the drum rotating at a relatively low speed for loading a sheet, rapidly accelerating to a relatively high speed for processing the sheet, then rapidly decelerating to the relatively low speed for unloading the sheet. A gate and conveyor are controlled to supply the sheet to the drum in precise registration. Vacuum apparatus and a charge corona are provided for attaching the sheet to the drum, the vacuum attaching the leading portion of the sheet, the corona charging the middle portion of the sheet to hold the sheet to the drum by electrostatic attraction, and the vacuum attaching the trailing portion of the sheet. Air pressure apparatus detaches the leading portion of the sheet for unloading.

Abstract: In a storage system including a semi-permanent database there is provided apparatus for updating said database comprising: instrumentalities for reading magnetically recorded data and storing said data in said database; a rotatable drum having an exterior circumferentially-extending surface, said drum including a plurality of protrusions extending beyond said exterior surface; a flexible magnetic card including database updating data magnetically recorded on a major surface thereof, said card having opposed side edges extending lengthwise thereof and having a leading edge and a trailing end edge respectively extending transverse to the length thereof, the length of said card being such that one of said end edges is disposable in overlapping relationship with respect to the other of said end edges when said card is wrapped around said drum, said card having a plurality of apertures formed therein, said apertures located to permit registration of a sufficient number of said apertures with said drum protrusions

Abstract: An ink jet printer includes a rotatable support means for supporting a sheet of paper, a rotary drive means for rotating the support means, and an ink jet print head mounted adjacent the support means for printing on a sheet of paper supported thereon during a plurality of successive rotations of the support means. A paper supply means loads a sheet of paper onto the support means such that the sheet of paper is supported thereby. A paper ejector means removes a sheet of paper from the support means. A control means controls operation of the paper supply means and the paper ejector means such that as a sheet of paper is removed, after a plurality of rotations on the support means, another sheet is concurrently loaded onto the support means, whereby the time required for loading and unloading a sheet of paper is minimized and the overall speed of the printer enhanced.

Abstract: Apparatus and method for a drum-type facsimile machine having a clamping mechanism for clamping an edge portion of sheet material to the drum and gripping arms operated for removal of the sheet material for gripping the paper to inhibit its movement with the drum. The gripping action is timed to be present during the unclamping of the sheet material. The clamping mechanism, when moved to its unclamped position, causes a limited rotation to be imparted to the drum to free the clamped edge portion of the sheet material from the drum for withdrawal from the apparatus by the operator.

Abstract: A paper web is maintained on a rotating apertured drum by means of a vacuum created inside of the drum. The paper length is slightly greater than the circumference of the drum thereby providing a tangentially projecting flap which is detected by a flap sensor. The concurrance of a pulse from the flap sensor with an end of message signal enables a counter. A first series of selected states of the counter are decoded and used to interrupt the vacuum causing the paper to come to rest against a shroud surrounding the drum. A second series of counter states, some of which coincide with the first series, open a discharge door covering a paper discharge opening in the shroud. When the vacuum is reapplied to the drum, upon expiration of the first series of counter states, the rotating drum boosts the paper out through the discharge opening.

Abstract: The present invention provides a document handling system having a processing device for transmitting information to and from a document and a document feed unit for driving the document along a feed path to the processing device. The system includes a pair of gripper bars and an electromagnet structure for selectively attracting the gripper bars to maintain them adjacent to the processing device. The processing device is fitted with a magnetic surface, and a control system, operating in conjunction with the feed mechanism, deactivates the electromagnet structure retaining the first gripper bar as a document is fed to the processing device. The first gripper bar is attracted to the magnetic surface of the processing device thereby clamping the document to the processing device.

Abstract: The sheet clamp apparatus is for clamping a sheet of original paper, recording paper, photosensitive paper, master plate, or the like on a drum usually provided in facsimile apparatus, copying apparatus, or the like. The apparatus comprises a single plate-shaped clamp member positioned along a generating line of the drum and at a part of the peripheral surface of the drum. The single clamp member presses firmly both the front edge and the rear edge of a sheet against the drum. The front edge of the sheet is clamped with the drum being stopped at a predetermined position, and the rear edge of the sheet is clamped after the drum has made about one revolution from the predetermined position of the front edge where the sheet is clamped.

Abstract: A jet drop copying apparatus has an array of printing nozzles supported for axial movement over a copy paper mounted upon a rotating drum. Simultaneously therewith an optical scanning system scans a document positioned flat on a planar support surface and sweeps an image thereof across an array of photosensors arranged in correspondence with the array of printing nozzles. Output signals from the photosensors are supplied to a control unit which controls the printing operation of the nozzles.The control unit also controls the optical scanning for synchronism with the movement of the nozzle array relative to the copy paper. The nozzles are rather widely spaced, but their spacing (and likewise the photosensor spacing) is adjusted in accordance with the number thereof and with the nozzle movement speed so as to produce an interlaced solid printed copy. Optical distortion during scanning is avoided by provision of a double lens arrangement with a rotating mirror therebetween.

Abstract: A record sheet clamping mechanism for a drum type facsimile and the like which can detachably hold one end of a record sheet on the outer peripheral surface of a rotary cylindrical drum by means of a clamping bar is disclosed. The mechanism comprises a balancing member which can always maintain substantially constant pressing force of the clamping bar to be applied to the record sheet irrespective of the number of rotations of the cylindrical drum.

Abstract: A record structure for recording with a radiation beam uses a transparent disc or drum, a coaxial backing disc or drum and two coaxial resilient ring-shaped seals to provide an enclosure between the discs or drums. Radiation-sensitive recording material on the side of the disc or drum within the enclosure is thereby protected from ambient dust particles and other contaminations, while the gaseous or solid by-products of the inter-action between the recording material and the radiation beam in the area around which the beam impinges are substantially contained between the disc surfaces and cannot produce deposits on an objective lens used to focus the radiation beam or poison the user.

Abstract: Disclosed is a sheet feed apparatus suitable for feeding an original into a copying machine at an intake position and through the machine past an exposure station, the apparatus comprising a rotary support having a surface for supporting the original, means rotatable with the rotary support for gripping the leading edge of the original, means for selectively coupling and decoupling the gripping means with the support, means in advance of the exposure station for pressing the original against the supporting surface, means associated with the rotary support for conveying the original in contact with the supporting surface when the gripping means is stationary and means for releasing the original from the gripping means at a discharge position after the support has made a predetermined number of revolutions.

Abstract: The invention provides an improvement for an apparatus which produces engraved printing forms via an electron beam device which is located in a vacuum chamber having an open side facing a peripheral surface of a printing form cylinder and defining therewith an air gap, and an arrangement for effecting relative movement of the vacuum chamber and printing form cylinder while maintaining the air gap. The inventive improvement comprises an annular member having an outer circumferential surface of a diameter corresponding to the outer diameter of the printing form cylinder, and cooperating annular bevelled contact faces provided on respective axial ends of the annular member and printing form cylinder so that, when the contact faces are coaxial and urged into abutment with one another, the outer circumferential surface constitutes an extension of the peripheral surface of the printing form cylinder.

Abstract: A drumless paper transporter carries a sheet of paper on a relatively narrow hub located near one end of the sheet. A plurality of canted idler rollers that surround the periphery of the hub dynamically adjust the sheet against a reference edge as the hub rotates. A plurality of guards surround the sheet at least in the region between adjacent idler wheels. In a preferred form, a flexible brush located interior to the path of rotation of the sheet has a free edge opposed by a fixed abutment member located exterior to the path to form a converging wall guide that accurately controls the radial position of the sheet. Also, a stripper blade reliably removes the paper from the hub during continuous operations by pivoting an edge interior to the path of rotation to direct the approaching sheet to an exit slot.

Abstract: A facsimile transceiver comprising a document/copy receiving drum, a motor for rotation of the drum about the drum axis and a read/write head mounted for linear movement in a direction parallel with the drum axis. When the transceiver is operating in the receive mode, the copy medium having adhesive along at least one edge circumscribes the drum in a closed loop so as to eliminate the necessity for transmitter-receiver angular synchronizing signals which would otherwise be required for locating the copy margin adjacent the edge of the copy paper. After completion of a transmission, the copy medium is severed along a line so as to provide an appropriate margin for the copied information content. The closed loop is formed from a single sheet having adhesive along at least one edge for purposes of forming a bond between opposite edges of the sheet when the sheet is applied to the drum.

Abstract: A facsimile transceiver comprising a document/copy receiving drum, a motor for rotation of the drum about the drum axis and a read/write head mounted for linear movement in a direction parallel with the drum axis. When the transceiver is operating in the receive mode, the copy medium having adhesive along at least one edge circumscribes the drum in a closed loop so as to eliminate the necessity for transmitter-receiver angular synchronizing signals which would otherwise be required for locating the copy margin adjacent the edge of the copy paper. After completion of a transmission, the copy medium is severed along a line so as to provide an appropriate margin for the copied information content. In one embodiment of the invention, the closed loop is formed from a single sheet having adhesive along one edge for purposes of forming a bond between opposite edges of the sheet when the sheet is applied to the drum.