Abstract: A sheet supplying apparatus comprises a sheet supporting plate for supporting sheets, a separation claw for regulating one end of a leading edge of the sheets supported by the sheet supporting plate, sheet supply rollers for feeding out the sheets supported by the sheet supporting plate, a regulator for regulating leading ends of the sheets supported by the sheet supporting plate, and a guide for guiding side edges of the sheets on which the separation rollers act. One sheet supply roller is positioned between the separation claw and the regulator in a direction perpendicular to a sheet feeding direction.

Abstract: A paper feeder is arranged so that a hand-carry type portable printer per se is mounted thereon, and a magnetic repulsion and/or a mechanical engagement are utilized to properly orientate and position the printer with respect to the base frame, when mounting the printer on the base frame.

Abstract: A dot printer includes: a platen and a printing head encased in a printer case in the vertical direction; a paper housing portion provided laterally of the platen; a feed roller disposed laterally of the printing head for feeding a paper taken out of a paper housing portion to the printing head; and a discharge roller disposed laterally of the printing head for discharging the paper outside of the case. With this construction, the printer can be made thin and can also be miniaturized.

Abstract: A thermal printer in which a sheet of recording paper is held by and between a thermal print head includes a plurality of heat generating elements and a platen drum, the amounts of heat of the heat generating elements are selectively changed, and an image is printed onto the recording paper. In the thermal printer, a printing position is set just behind a clamp position at which a clamp clamps the leading end of the recording paper onto the platen drum. Therefore, the image printing can be started immediately after the clamp position passes through the thermal head, with the recording paper being in part wound around the platen drum by the thermal printer. As a result, the time taken from paper feeding to printing starting can be reduced.

Abstract: A pair of conveyor rolls for transporting each record sheet to be printed past the ink-jet printing head is disposed directly below the printing zone of an ink-jet printing head to permit the transportation of freshly printed record sheets within an ink-jet printer without the print being smudged. A gripping device grabs the printed record sheet at its lower edge immediately after it has left the pair of conveyor rolls and carries it out of the printing zone and into an output area.

Abstract: A sheet feeding apparatus includes a sheet containing device for supporting sheets, a sheet supply device for feeding out the sheet from the sheet containing device, and a path surface for deflecting the sheet by abutting the sheet fed from the sheet supply device against the path surface to guide the sheet in a predetermined direction. In such sheet feeding apparatus, a rotary feeding device for applying a feeding force to the sheet by slidingly contacting with a surface of the sheet fed from the sheet supply device, which is opposite to a surface facing the path surface, is provided.

Abstract: An apparatus for control of a sheet of paper in a printer mechanism includes a single motor drive mechanism, a frame, a platen, a roller assembly for advancing the sheet of paper over the platen, and a kicker element for selectively contacting only an edge of a sheet of paper and for urging the sheet of paper in a forward direction once it is forwardly disengaged from the roller assembly.

Abstract: A printer apparatus having a sheet feeding roller which rotates in the forward direction only when the platen rotates in the reversed direction, and a auxiliary sheet feeding roller rotating in the forward direction both when the platen rotates in the forward direction and when it rotates in the reverse direction, when the platen rotates in the forward direction, the printing sheet is nipped at a predetermined amount between the platen and the driven roller, and thereafter while the platen is rotated in the reverse direction sufficient for pushing the thus nipped sheet back while the auxiliary sheet feeding roller rotates in the forward direction to eliminate an undesirable skew, whereby the printing sheet is bent being pushed in front and in rear, and thereafter the platen is rotated in the forward direction again, to transport the printing sheet to a printing start position.

Abstract: A recording and reproducing apparatus includes a sheet supply mechanism, a sheet transporting mechanism, an image recording mechanism and a sheet discharging mechanism. The mechanisms are driven by a rotary driver which transmits a driving force through a driving force transmitter to a plurality of rotating bodies. The driving force transmitter can engage a selected number of mechanisms through the rotating bodies to transmit the driving force from the rotary driver.

Abstract: An adjustable cassette for use in an envelope printing system. The cassette includes an elevator for maintaining the top envelope in a stack of envelopes in contact with a take-up roller in the printing system. The cassette also includes lateral guides positioned adjacent to the extreme forward portion of the envelope stack. The lateral guides are resiliently mounted to depress and pass beneath the take-up roller as the cassette is inserted into the printing system.

Abstract: A thermal transfer printer having a simplified structure and an improved printing speed, includes a paper supply section including a plurality of roller guides for guiding sheets of paper from a paper tray, a printing section including a platen drum and a thermal print head, for printing a picture onto paper guided along the platen drum, and a paper discharging section including a plurality of roller guides, for discharging the printed paper. The printing section includes a platen drum, one or more guide drums and a pair of roller guides, forming a closed loop around the drums on which sheets of paper are carried.

Abstract: A paper feeder including a driven platen which receives paper fed from a paper feed roller mounted on a shaft. Also mounted on the shaft is a freely rotatable gear which cooperates with a one-way clutch by way of interengaging protrusions, to rotate the shaft mounting the paper feed roller. When the paper reaches the platen, the paper is fed at a faster rate than the feed rate of the paper feed roller so that the roller and shaft are rotated by the action of the paper. Whereupon, the protrusions disengage and the gear does not cause rotation of the one-way clutch until after the first sheet of paper has been completely fed.

Abstract: A sheet material feeding device includes a first conveying path for feeding sheet material, a second conveying path for feeding the sheet material and which joins the first conveying path, an anchoring unit for anchoring and bending the leading end of the sheet material fed through the first conveying path or the second conveying path, and a guide member provided at the joining point of the first conveying path and the second conveying path for allowing the sheet material fed from an upstream side through the first conveying path to pass the joining point and for preventing the sheet material fed from a downstream side through the first conveying path from entering an upstream side from the joining point. The guide member presses a curved portion of the sheet material formed by the leading end of the sheet material fed through the first conveying path anchored by the anchoring unit in a direction to flatten that portion.

Abstract: The invented printer includes a paper drive and mechanisms which hold paper in proper alignment in the drive. Specifically, it includes a pressure plate capable of bringing a sheet of paper into contact with a drive roller so that the paper is properly aligned, a wrapper which keeps paper in proper contact with the drive roller, a media edge contactor that presses against paper, a carriage guide support which helps to insure proper alignment of the paper during printing, and a back-out restraint to prevent paper from backing out of the printer.

Abstract: A color printer is provided in which a paper sheet is wrapped about a rotatable platen and three colors are printed on the sheet, to obtain an image, by a thermal head and a color ribbon during three rotations of the platen. In a paper feeding device for the printer, a sheet of paper is fed by a feeding roller, from the bottom of a stack of paper sheets in a paper tray through, a feeding guide to the platen. The tray has an opening in its bottom plate so as to expose the lowermost paper sheet stored therein. The feeding roller is provided under the tray and lifts up toward the opening of the tray so as to come in engagement with the lowermost paper sheet, the feeding roller rotating to feed it to the platen. The width of the platen is less than that of the sheet and the circumference thereof is less than the length of the sheet. Therefore, when the sheet is wrapped about the platen, it extends laterally outward from the ends thereof, and its ends overlap.

Abstract: There is disclosed a device for feeding documents stacked in a document tray for use in a facsimile machine. The device includes a pick-up roll for picking up the undermost document of the stacked documents, a transferring roll for transferring the document picked up by the pick-up roll, the two rolls being mounted parallel and synchronized with each other, a shaft for rotating the pick-up roll, a bushing having a cylindrical portion and a notch portion and fixedly mounted on one end portion of the shaft, a driving gear having a cylindrical portion and a plurality of notch portions and loosely mounted on the end portion of the shaft with the cylindrical portions opposing each other, and a clutch spring having an internal end and external end and encircling the two cylindrical portions with the internal and external ends respectively caught in the notch portions.

Abstract: A recording apparatus on which a cut sheet feeder is removably mountable includes an outer case, a feed roller contained in the outer case and rotatable by the power of a drive source, a pinch roller urged against or spaced apart from the feed roller, and a controlling device exposed out of the outer case and engageable with the cut sheet feeder to forcibly control the pinch roller into a state in which it is urged against the feed roller. The cut sheet feeder has a first stacker piling thereon cut sheets to be fed to the recording apparatus, a second stacker piling thereon cut sheets discharged from the recording apparatus, and a controlling device for forcibly controlling the pinch roller into its urged state when the cut sheet feeder is mounted on the recording apparatus.

Abstract: The printer device is fashioned as an independent structural unit and is arranged such that the printer head is situated in front of a cooperating platen that is seated such next to the deflection roller that does not cover the full width of the document in the document processing means that its apex line facing toward the printer head proceeds in alignment with a corresponding apex line of the deflection roller. The structural unit is held in guide elements and is removable from the printing position tangentially relative to the apex line of the cooperating platen along the guide elements. A printer head operating based on the thermo transfer principle and having a thermo-inking ribbon transported synchronously with the document preferably serves as the printer device.

Abstract: A mechanism is described for automatically handling envelopes and paper sheets, the mechanism having an input window for receiving the envelopes and paper sheets. The mechanism comprises a first tray for holding a stack of paper sheets and is mountable in the window. A second tray is provided for holding a stack of envelopes and is also mountable in the window. A roller system is positioned to selectively engage the topmost sheet of the stack of sheets in the first tray or a bottommost envelope of the stack of envelopes in the second tray and to feed either the topmost sheet or the bottommost envelope, as the case may be.

Abstract: The present invention, whose auto sheet feeder is demountably mounted on a printing machine, which includes a sequential arrangement of a reversible motor, a transmission mechanism, and a rotatable platen, is provided with an input gear, an arm whose one end is supported by the input gear for rotation around its axis of rotation and is urged to move toward a gear of the transmission mechanism, and as planetary gear rotatably provided at the end of the arm to be constantly in mesh with the input gear and opposite to the periphery of the gear of the transmission mechanism.

Abstract: A device for feeding of individual sheets to a plate (4) of an office machine, in particular of a matrix printer (1), is provided with several storage bins (5, 6). In each case a separating roller (7, 8) is coordinated to the storage bins (5, 6) and the separating roller (7, 8) is connected to a drive motor (9) via a gear train.

Abstract: A printer having a printing unit for printing on a sheet and a sheet feeding control section for controlling continuous or cut sheet feeding is disclosed. The sheet feeding control section performs sheet feeding of a predetermined amount after the data corresponding to one page has been printed by the printing unit. The sheet detecting section detects whether or not the printing sheet exists in the vicinity of the printing unit. If no printing sheet is det4ected in the vicinity of the printing unit, the printing control section determines that no continuous-page sheet feeder has been mounted. On the other hand, if the printing sheet is detected, the printing control section determines that the continuous-page sheet feeder has been mounted. If it is found that no continuous-page sheet feeder is mounted, the printing operation is stopped temporarily. If it is found that the continuous-page sheet feeder has been mounted, the printing operation is continued.

Abstract: In a printer of the type having a print mechanism comprising a platen rotatable about its own axis for supporting a print sheet, an ink ribbon cassette accommodating an ink ribbon therein, and a print head movable along the platen for performing a print operation on the print sheet with the use of the ink ribbon, a hopper storing a stack of cut sheets is disposed above a first area of a printer frame and a stacker above a second area thereof. A pin tractor is disposed beneath the first area thereof for mounting a continuous sheet. The cut sheet and the continuous sheet are selectively fed to the print mechanism for printing. The stacker is movably disposed between a cut sheet receiving position allowing to receive the cut sheets discharged from the platen and a rest position rejecting to receive the cut sheet. A space above the second area is enlarged when the stacker is brought to the rest position, whereby the ink ribbon cassette disposed beneath the second area can easily be exchanged.

Abstract: A printer wherein a piece of recording paper housed in a cassette is picked up and sent to a platen roller which is made to rotate in the direction of leading the sent recording paper to the printing position, hereupon one piece of recording paper to be sent to the printing position is separated from the other pieces, the latter pieces being sent back in the reverse direction to the printing position, by rotating a separation roller positioned against the platen roller in the same direction as that of the platen roller rotation.

Abstract: In a sheet feeding apparatus which is employable in a printer and the like, provided is a mechanism for removing sag of the printing sheet caused by backward feeding operation executed when the reverse line feed operation and so on. Further, the mechanism controls the sheet feeding operation so as to be executed without a disadvantage caused by backlash included in a gear mechanism for driving the sheet to be fed. Thus, the printing sheet is accurately set at a printing position.

Abstract: A document imprinting device for imprinting on documents such as checks comprises a frame, a document feeding mechanism mounted on the frame for sequentially feeding documents, a conveying mechanism for conveying a document from the document feeding mechanism along a document conveyance path, an imprinting mechanism for imprinting the documents conveyed along the document conveyance path, and a sensing mechanism positioned along the document conveyance path for sensing the position of the documents and for triggering the imprinting mechanism such that the document is imprinted at a desired location on the document.

Abstract: The printer drives the sheet feeding mechanism in response to the initial sheet-setting command and both the first sensor's and the second sensor's detection of no sheet, first forward until the second sheet sensor detects no sheet, then backward until the second sheet sensor detects no sheet, and finally forward the predetermined distance. The paper is neither caught nor crumpled near the exit of the first sheet supplier when the paper is fed backward.

Abstract: The present invention relates to a rotation transmission mechanism for transmitting the rotation of a drive gear on a printer body side to a driven gear as a rotation power source on a paper feeder side. The present invention includes a gear shaft of the driven gear freely movably disposed on the paper feeder side so that the driven gear engages with the drive gear on the printer body side. In the present invention, when the paper feeder is placed on the printer body, the gear shaft of the driven gear of the paper feeder moves downward from a position it holds when the paper feeder is removed from the printer body, and the driven gear is engaged with the drive gear of the printer body.

Abstract: An improved sheet separator and guide construction for a printer having a supply station and a feeder/platen for feeding a top sheet from a supported sheet stack and transporting it through the printing region. The construction includes a force plate for urging a supported sheet stack so that its top sheet contacts the feeder-platen and is moved toward a supply station egress region. A pair of sheet corner deflectors located respectively at opposite edges of the supply station egress region are constructed to direct sheet corners fed there-against inwardly toward the sheet center, and a central deflector located along a central portion of the egress region in spaced relation between the corner deflectors is constructed to direct the center lead-edge of a sheet fed there-against upwardly toward the printer top.

Abstract: A paper feeding apparatus associated with a printer for storing a plurality of individual recording media and for controlling the release of individual recording media from a storage device toward a platen of the printer. A transmission mechanism couples rotation of the platen in a counterclockwise direction which rotates the paper feeding rollers in a clockwise direction for releasing the individual recording media from the storage device. Rotation of the platen in a clockwise direction halts rotation of the paper feeding rollers preventing further release of individual recording media from the storage device while rotating auxiliary paper feeding rollers in a counterclockwise direction for advancing the individual recording medium toward the platen. A release lever disengages the paper feeding rollers and auxiliary paper feeding mechanism to permit use of continuous print media.

Abstract: A tray assembly for a full color thermal transfer type printer is disclosed. The printing mechanism of the printer including a roller platen moves the sheet of printing paper under printing several times forward and backward to effect a full color printing. The tray assembly comprises a discharge tray at the top, a paper guide formed integrally thereunder, and a manual feed tray detachably attached to the underside of the paper guide. The paper guide form an extension of the return paper passage of the printer into which the sheet of paper enters when it is moved backward. The tray assembly further comprises a pair of plate-shaped adapters detachably attached to the interior sides of the side walls of the manual feed tray; thus, the interior side surfaces of the adapters determine, when attached to the manual feed tray, the lateral position of the sheet of paper fed into the printer from the manual feed tray.

Abstract: A sheet feed device for feeding a sheet-like material includes a feed roller disposed upstream with respect to a sheet feeding direction for feeding the sheet-like material and main and auxiliary roller pair disposed downstream with respect thereto for further feeding the sheet-like material fed out by the feed roller. At the start of feeding the sheet-like material, both the feed roller and the main and auxiliary roller pair are rotated, and after the sheet-like material is fed a certain distance and grasped by the main and auxiliary roller pair, only the main and auxiliary roller pair is rotated, whereby a load imposed to a motor for rotating both the feed roller and main and auxiliary roller pair is lessened.

Abstract: A sheet feeder is disclosed, which is mounted in a printer for feeding cut printing sheets one by one to a printing position in the printer. The sheet feeder comprises first and second sheet accommodation sections for accommodating respective stacks of printing sheets. First and second feed roller mechanisms are provided for the respective sheet accommodation sections. These roller mechanisms selectively receive a drive torque from a single reversible drive motor via a selective coupling mechanism. The selective coupling mechanism senses the direction of rotation of the drive motor, and selectively couples the drive motor to either one of the first and second roller mechanisms according to the sensed direction of rotation.

Abstract: A paper feeder comprises a tray having a stage on which papers to be fed are stacked, driving means for driving a platen, transmitting means for transmitting a motive power of the driving means to position the stage at predetermined position for paper feeding operation, and paper feeding means having a roller for feeding the uppermost one of the papers stacked on the stage when the uppermost paper positioned to contact with the feeding roller at the predetermined position by the motive power. It is advantageous that the paper feeder can be made economical and compact since there is no need to provide an exclusive motive power source having a speed reducer. Furthermore, a contact pressure between the paper feeding roller and the paper is stabilized to enhance the accuracy of the paper feeding.

Abstract: A sheet feeding apparatus for use with a printing office machine includes at least one magazine, a drive wheel for removing a single sheet from the magazine and passing the sheet in a forward direction the nip of a printing wheel; the printing wheel is drivingly connectable with the separating roller and is driven in a forward direction to provide rotary power to the sheet feeder wheel to effect feeding of a single sheet to the nip; the method includes first driving the printing wheel in the forward direction and then reversing the direction of rotation of the printing wheel to move the sheet back out of the nip, the reverse rotation being disengaged from the separating wheel by a latch device.

Abstract: A low cost, compact ink jet recording apparatus effectively uses a single drive source for controlling paper feed and discharge operations. The apparatus comprises a feed mechanism for feeding a sheet to be printed, discharge rollers for discharging the printed sheet, a moving mechanism for engaging and disengaging the discharge rollers, and a single drive source for operating the feed mechanism, the discharge rollers and the moving mechanism. The apparatus increases sheet feeding reliability by disengaging the discharge rollers during printing. Because the sheet feed mechanism, moving mechanism and discharge rollers are operated by a single drive source, a simpler structure is possible.

Abstract: A sheet-feeding device for feeding individual sheets to the platen of a printing apparatus from a single storage unit or a plurality of storage units is provided. The sheet-feeding device incorporates selecting discs incorporating a switching arrangement for the purpose of establishing a driving connection with the associated printing apparatus to a separating roller for withdrawing a sheet from the selected storage unit. In the storage units which have not been selected, the switching disc prevents inadvertent activation of the non-selected storage units by a blocking device controlled by a counter which permits the switching arrangement to be blocked during the printing process in order to prevent undesired sheet feeding.

Abstract: The sheet feeder can be mounted on a typewriter or on a printer in a system for processing data. The sheets which are accommodated in a feed magazine are passed to the platen roller by friction stripper rollers. After the printing operation, the sheets are passed on to a collection table positioned in front of the feed magazine. The stripper rollers are permanently connected to the platen roller by way of a mechanical transmission and rotate in the same direction as the platen roller. The stripper rollers are mounted on an oscillating arm to be selectively moved towards or away from the first sheet to be fed, by means of a first cam. Before a fresh sheet is fed, a second cam, also coupled to the platen roller, has to be brought to a reference position by rotating the platen roller enough to expel the current sheet. The platen roller is then rotated in the reverse direction, whereby the second cam actuates a lever, thereby to close a clutch.

Abstract: A sheet-feeding device for feeding individual sheets to the platen of a printing apparatus from a single storage unit or a plurality of storage units is provided. The sheet-feeding device incorporates a selecting disc incorporating a switching arrangement for the purpose of establishing a driving connection with the associated printing apparatus to a separating roller for withdrawing a sheet from the selected storage unit. In the storage units which have not been selected, the switching disc prevents inadvertent activation of the non-selected storage units by a blocking device controlled by a counter which permits the switching arrangement to be blocked during the printing process in order to prevent undesired sheet feeding.

Abstract: The printer paper feed mechanism disclosed herein operates to transfer a sheet of paper being printed from the printing platen to an output tray above the platen by means of a plurality of resiliently surfaced rolls carried on a shaft which is journaled in arcuate slots in end plates at either end of the platen roll. When the rollers are driven in one direction, the shaft walks along the arcuate slots toward a guide which is overlaid by a sheet of paper being fed from the platen. The rollers drive that piece of paper upwardly away from the platen and into the output tray.

Abstract: A sheet feeder for automatic printers has a single cassette sheet feeder in which the printer rests. The printer supports an over-the-top feed apparatus which receives sheets from the cassette and transports sheets to the platen of the printer and from the platen to a receiver.

Abstract: A bottom-weighted, free-standing, self-contained, self-supported printer in which the printer is provided with two vertical hoppers in spaced-apart adjacency, with the first hopper to house a supply of cut paper and with the second hopper for paper retrieval in a first in/first out (FIFO) sequence, in which the printer has an exceedingly small footprint so that it may be utilized adjacent the display for a personal computer.

Abstract: A cut sheet feeding mechanism for feeding a cut sheet from a sheet hopper to a platen roller which is rotated in a forward direction to further feed the cut sheet to a printer. The mechanism includes a pick-up roller for picking up a cut sheet from a sheet hopper by rotating in a forward rotary direction and a transmission for transmitting the rotary force of the platen roller to a pick-up roller in a manner such that the pick-up roller also rotates in the forward direction. The transmission includes a disabling device for disabling the transmission after the pick-up roller has fed the cut sheet from the hopper by a predetermined amount.

Abstract: A coupling (12) to be operated between a platen (16) and a sheet separating arrangement (18) may be triggered by the reversal of the direction of rotation of the platen (16) in order to produce a driving connection from the platen (16) to the separating arrangement (18). The drive at the same time takes place as a result of a reverse rotation through a predetermined rotational angle and a subsequent forward rotation. In order, however, to make possible also a backward rotation of the platen without any triggering of the couling, said coupling has camming discs (40, 44) one of which serves for the production of the driving connection by engagement of one driver and the other for the prevention of an engagement of the driver, whenever the platen is turned backward beyond the predetermined angle of rotation. The prevention of coupling which is caused thereby, produces the freedom of rotating the platen forward and backward for the production of a graphic presentation on the sheet.

Abstract: A paper feeding device for feeding paper to a printer wherein the paper is advanced by a paper feed motor and a print head prints on the paper while the paper is supported by a platen. The feeding device includes a paper stacker for storing a stack of paper sheets, a feed roller which is disposed for contact with a top sheet of the paper stack for feeding the top sheet when the roller is rotated, a first paper path for directing the top sheet from the paper stacker to the printer, a second paper path for directing another sheet of paper to the printer without passing the feed roller, a transmission mechanism disposed between the feed roller and the paper feed motor for transmitting a rotary motion of the paper feed motor to the feed roller, and a cut-off mechanism disposed in the transmission mechanism which is manually operated to a cut-off position in which the feed roller is operatively disconnected from the paper feed motor.

Abstract: The printing machine comprises a device for the supply of sheets. This dee is constituted in the form of a removable unitary module comprising means for taking-up motion. Selection means are provided and comprise motion distributing means associated with said take-up means to direct the motion to means for extraction of sheets.

Abstract: A device for marking of comparatively stiff, bendable sheets (21) by of a stationary write head (3), which sheets are displaceable relative to the write head (3) along a linear guiding path (12, 13), comprising a feeding device (27) for feeding the sheets one at time from a magazine (9). The sheets (21) are arranged to cooperate with a guiding member (17) movable to-and-fro in the longitudinal direction of the guiding path (12, 13) by the driving device (28). The feeding device (27) has a sliding track (8) which inclines against the guiding path (12,13) and arranged in connection to the magazine (9). In the extension of the sliding track (8) above the guiding path (12, 13) there is arranged a driving wheel (24) for feeding the front edge of the sheets (21) along the guiding path until the rear edge of the sheets leave the sliding track and are completely located on the guiding path and in cooperation with the guiding device (17).

Abstract: A printing apparatus having a printing unit and a paper supply unit mounted thereon is provided with a control means which controls a carriage such that it occupies a position other than its home position when a front end of a paper passes through a guide member for guiding a printed paper. The apparatus can be provided with a movable paper guide which is movable between a use position and a wait position. A clutch mechanism is provided for transferring rotation from the platen to a feed roller associated with the paper supply unit.

Abstract: A paper feed device of the invention comprises a transport gear connected in coaxial relationship to a transport roller interposed in a paper transporting route, a change-over arm which is rocked within a predetermined fixed range when the direction of rotation of a bidirectionally rotatable platen is reversed, and an idler gear mounted at a rocking free end of the change-over arm and connected to be normally rotated by power transmitted from the platen. The idler gear is selectively meshed with the transport gear in response to a rocking motion of the change-over arm, whereby a turning force of the platen is transmitted to the transport roller to transport paper only when the platen is rotated in one direction. Such a manner of transmission of rotation is attained without the necessity of a one-way clutch.

Abstract: A sheet feed device for sequentially selecting and feeding sheets of paper from one or more trays or magazines mounted upon a printer and delivering them to the platen of the printer. The device includes one or more selector latch mechanisms, one associated with each tray, whose movement is controlled by the platen rotation and which, in turn, controls the rotation of sheet feed rollers associated with the trays, in response to a specific sequence of forward and reverse angular platen movements.