EP0128866B1 - Sheet feeding device for a printer or a typewriter - Google Patents

Sheet feeding device for a printer or a typewriter Download PDF

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Publication number
EP0128866B1
EP0128866B1 EP84810261A EP84810261A EP0128866B1 EP 0128866 B1 EP0128866 B1 EP 0128866B1 EP 84810261 A EP84810261 A EP 84810261A EP 84810261 A EP84810261 A EP 84810261A EP 0128866 B1 EP0128866 B1 EP 0128866B1
Authority
EP
European Patent Office
Prior art keywords
selection
lever
selection lever
guide tracks
platen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84810261A
Other languages
German (de)
French (fr)
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EP0128866A1 (en
Inventor
Jorge Costa
Wolfgang Reichel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hermes Precisa International SA
Original Assignee
Hermes Precisa International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hermes Precisa International SA filed Critical Hermes Precisa International SA
Publication of EP0128866A1 publication Critical patent/EP0128866A1/en
Application granted granted Critical
Publication of EP0128866B1 publication Critical patent/EP0128866B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/44—Simultaneously, alternately, or selectively separating articles from two or more piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B41J13/0018—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material in the sheet input section of automatic paper handling systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42328—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles of inclined articles and inclination angle >45

Definitions

  • the present invention relates to a sheet feeding device for printer or typewriter comprising a frame, one or more supports on which the sheets to be printed are stored in a stack, an extraction mechanism, associated with each of the supports, intended for extracting a sheet from the support for insertion into the printer, and a selection mechanism intended to activate one of the extraction mechanisms, the selection mechanism and the extraction mechanisms being driven by a cylinder drive member from the printer in two opposite directions.
  • the device described in this patent includes a selection mechanism driven by the striking cylinder enabling one of the paper extraction mechanisms to be activated by first driving the striking cylinder over a predetermined distance in a paper opposite to the introduction of the paper, by reversing the drive direction over a small predetermined distance, then driving the cylinder again in the first direction to advance the sheet to the striking cylinder and by reversing the direction d a third time drive the striking cylinder to feed the paper into the printer.
  • This mode of operation is complicated.
  • the device described in this German patent allows to go back only a few lines, otherwise the one of the extraction mechanisms is driven to advance a sheet towards the printer which can disturb the operation of the device.
  • the selection mechanism comprises a selection lever driven by the drive member and a guide piece cooperating with a portion of the selection lever, this guide piece comprising a selection slide cooperating with said portion and a number of guide tracks for this portion at least equal to the number of extraction mechanisms, the device comprising, associated with each of the guide tracks an extraction control part arranged so as to cooperate with the selection lever, each of the guide tracks having an opening through which it communicates with the selection slide, the selection lever being urged by an elastic element in a position of rest from which it is driven in a first direction following the selection slide towards said openings, which are arranged es so that said portion follows one of the guide tracks, when the selection lever is moved in a second direction opposite to the first to cooperate with one of the extraction control parts.
  • the sheet feeding device 1 is mounted on a printer 2 or typewriter comprising a striking cylinder 3 and a movable carriage 4 movable along the cylinder and carrying a writing device 5, such as a needle head or a character disc.
  • a drive shaft 6 connected to a drive motor preferably of the stepping type, not illustrated, drives the cylinder 3.
  • Back pressure rollers, of which only one 7 is shown, are elastically biased against the cylinder and constitute a drive mechanism 25 for advancing in a known manner a sheet of paper introduced into the printer.
  • the feed device 1 comprises a chassis 40, the side walls 41 of which have notches 42 which fit on the shaft 43 of the striking cylinder 3.
  • the base 44 of the chassis rests on the rear part of the printer 2.
  • the feeding device 1 comprises supports 8 and 9 on which the sheets 11 to be printed are stored. These supports include cassettes 12 and 13, which can be placed on retaining plates 14, 15 and be removed from these locations.
  • the cassettes 12, 13, of rectangular shape have a bottom 16 and side walls 17, 17a. The latter have at their upper part retaining members 18, 18a, in the form of flanges intended to retain the sheets 11 placed on a support plate 19.
  • This plate 19 is biased in its lower part by a spring 20 in the direction of the members retainer 18. At its upper part, the plate 19 is kept substantially in contact with the bottom 16.
  • An extraction mechanism 21, 22, is associated with each of the supports 8, 9 and serves to shift and extract the tallest sheet from the stack of sheets 11 and to transport it through a channel 23, 24 to a paper driving device 25.
  • this mechanism is arranged so as to transport the sheet upwards using a roller 26.
  • the lower edge of the sheet then emerges from the members retainer 18 and the sheet, abutting against the upper wall 17a of the cassette, forms a pocket 10.
  • the roller 26 then drives the sheet in the opposite direction. The lower edge passes over the retaining members 18 and the pocket 10 is eliminated.
  • the roller 26 is then released from the sheet which falls in free fall on an alignment stop 27.
  • a transport device 28, constituted by two rollers 29, 30, is then made active to introduce the sheet in a controlled manner into the printer 2 where it is taken up by the drive device 25.
  • the device 1 further comprises two supports 31 and 32 intended for the storage of the printed sheets. After printing, the latter pass through the outlet channel 33, where they are entrained by the transport device 34 also consisting of two drive rollers 35 and 36 to be deposited in normal order on the support 31 or in reverse on the support 32.
  • the wall 45 separating the two supports is mounted for this purpose so pivoting around a pivot 46.
  • a lever 48 makes it possible to block this wall 45 in a given position.
  • the lower edge 47 of the wall 45 has two guide surfaces leading the sheets to the outlet of the channel 33 either to the left on the support 31 or to the right on the support 32.
  • the support 32 can also be used as a support for feeding envelopes to be printed. It has, for this purpose, in its lower part, a channel 49 adapted so as to drive the envelopes towards the cylinder 3.
  • An extraction mechanism 50 is arranged at the lower part of the support 32 and makes it possible to offset and to drive the lowest casing of a stack placed on the support 32.
  • the casing stack is held by rollers 51 arranged on a transverse bar fixed to the end of an elbow lever 52 pivotally mounted around a pivot 53.
  • the rollers 51 are biased by a spring 54 in the direction of the rear wall of the support 32. If this support is used as a reservoir for the sheets already printed, the rollers 51 rest on this wall so as to obstruct the entry from channel 49.
  • the supply device comprises a selection mechanism 55 intended to activate, according to the user's choice, one of the extraction mechanisms 21, 22, 50.
  • This selection mechanism 55 comprises a lever selection 56 pivotally mounted at one end of a selection arm 57, the other end of which is integral with a bushing 66 rotatably mounted around a shaft 58.
  • a guide piece 59 cooperates with a finger 60 passing through the end of the selection lever 56.
  • a spring 61 a connects the lever 56 to the arm 57 so as to urge the finger 60 against the guide piece 59.
  • the arm 57 is driven by the striking cylinder 3 thanks to a series of gears 61 to 65 so that the arm 57 pivots in the same direction around the shaft 58 as the cylinder 3 around the shaft 43.
  • the toothed wheel 65 pivotally mounted around the shaft 58, comprises a bush 67 connected by a freewheel coupling device to the socket 66 secured to the arm d e selection 57.
  • the coupling device consists of a spring clutch 68.
  • One end of the spiral clutch spring 68 is rigidly fixed to the sleeve 66, while the other end is wound around the sleeve 67 and comprises an extension 69.
  • the selection arm 57 is biased by a spring 70 in a rest position, in which the finger 60 is held against a stop 71 of the guide piece 59.
  • the winding of the spiral clutch spring 68 is such that the sockets 66 and 67 are coupled, when the wheel 65 rotates in a sinister direction.
  • the sleeve 67 can on the other hand continue to rotate in a dextrous direction, when the selection lever 56 is stopped by the stop 71. In the case illustrated in FIG. 2, this winding of the spring 68 must therefore be dextrous.
  • the extension 69 of the spring is capable of coming into contact with a stop constituted by a shaft 82 and is blocked by the latter, when the toothed wheel 65 rotates in a sinister direction. This blocking of the extension 69 has the effect of slightly opening the spring 68 wound around the sleeve 67 and of uncoupling the selection arm 57 from the drive device 61 to 65.
  • the guide piece 59 of the selection mechanism comprises a selection slide 72, along which the finger 60 is guided when the selection lever rotates in a sinister direction, and a number of guide channels 73 to 75 equal to the number of extraction mechanisms 21, 22, 50.
  • the selection slide 72 and the guide tracks 73 to 75 are formed by sectors of concentric circles.
  • the axis of rotation of the selection arm 57 coincides with the center of these concentric circles.
  • the guide tracks 73 to 75 have openings 73a, 74a, 75a communicating with the selection slide 72 so that the finger 60 can follow one of the guide tracks when the lever 56 is driven in the opposite direction. It is therefore the amplitude of the displacement of the lever 56 in the direction of the direction which determines the guide path followed by the finger 60.
  • the feed device comprises, associated with each of the guide paths, an extraction control part. , such as flip-flops 76 to 78.
  • flip-flops 76 to 78 are pivotally mounted on the shaft 82 and cooperate by a fold with the finger 60, when the latter takes the corresponding guide track. A rotation of one of the rockers causes the corresponding extraction mechanism to start. Solicited by a spring 79, the rocker then falls back into its rest position determined by a stop 80.
  • the guide tracks 73 to 75 meet and communicate with the selection path 72 through an opening covered with an elastic blade 81 so as to allow the output of the finger 60 in direction of the rest position, but preventing any entry to this finger 60, when it is moved from right to left.
  • Each of the extraction mechanisms associated with the paper supports comprises a cam 90 to 92.
  • This cam is pivotally mounted around an eccentric pivot 93 on a bent arm 94 capable of pivoting around a shaft 95.
  • a stop 96 integral with the cam 90 cooperates with the fold 97 of the rocker 76 to prevent the cam 90 from rotating around the pivot 93.
  • a spring 102 biases the bent arm 94 against a fixed stop 101 so that the periphery of the cam 90 occupies a position close to the periphery of the toothed wheel 63b, but does not touch this periphery, when the fold 97 is in contact with the stop 96.
  • Each of the extraction mechanisms further comprises a lever 98 biased by a spring 99, arranged between the lever 98 and the bent arm 94, against a part 100 integral with the cam 90 so as to rotate the cam 90, when the fold 97 is released from the stop 96.
  • the periphery of the cam 90 comprises a first portion 90a constituted by a toothing capable of cooperating with the toothed wheel 63b and a second smooth portion 90b capable of sliding on this toothing under the action of the spring 102.
  • the end of the bent arm 94 is coupled to a pull tab 105 controlling means 106 for separating a sheet and fitting the alignment stop 27.
  • This alignment stop is constituted by a comb-shaped part fixed between two arms 107 pivoting around a shaft 108 fixed to the chassis.
  • a finger 125 secured to the pull tab 105, engaged in a slot in the wall 41, is connected by a spring 109 to one of the arms 107.
  • the separation means 106 comprise, near the two side walls 41, a lever 110 mounted on a shaft 111 fixed to the chassis and a bracket 112 also pivoting around the shaft 111.
  • the lever 110 and the bracket 112 are connected by a spring 113 urging the bracket 112 towards a rest position determined by two stops 114 and 115 carried by the lever 110 respectively the bracket 112.
  • the roller 30 of the extraction mechanism is pivotally mounted on a shaft 116 held by the levers 110.
  • a spring 117 biases the levers 110 in a position such that the roller 30 remains in contact with the roller 29 fixed on a shaft 118 mounted on bearings integral with the chassis.
  • This shaft 118 is driven by the striking cylinder 3 by means of gears 119 to 121, so that the roller 29 and the striking cylinder 3 rotate in opposite directions.
  • the roller 26 comprises a shaft 122 mounted on the brackets 112.
  • a toothed wheel 123 secured to the shaft 122 cooperates with a toothing 124 in the form of a segment of a circle carried by one end 124 of one of the levers 110.
  • the other end of this lever 110 is arranged so as to cooperate with the finger 125 integral with the pull tab 105 to control a pivoting of the lever 110 around the shaft 111.
  • the device further comprises a stop 126 intended to fix the exact position of the stop of alignment 27 during its installation and stops 127 to limit the pivoting of the bracket 112 around the shaft 111.
  • the rollers 26, 29 and 30 are covered with elastomer to ensure a friction drive of the sheets of paper.
  • the sheet feeding device can be adapted to any printer or typewriter comprising a control unit 130 capable of precisely controlling the drive of the striking cylinder in both directions.
  • the device operates as follows.
  • the control unit 130 of the printer receives the order to introduce a given type of sheets stacked on the supports 8, 9 and 32, it controls a rotation of the cylinder 3 in a direction opposite to the introduction .
  • the cylinder 3 drives through the gears 62 to 65 the arm 57 and the selection lever 56 according to a sinister rotation.
  • the amplitude of this sinister rotation determines which of the guide channels 73 to 75 will be followed by the finger 60. This amplitude therefore constitutes the selection criterion.
  • the gears 62 to 65 were chosen so that the selection is made for cylinder rotations of between 2 and 2.5 turns in the direction opposite to the introduction of the paper.
  • the direction of drive of the cylinder is then reversed and the finger 60 follows one of the paths 73 to 75 to actuate one of the extraction control parts, constituted by the rockers 76 to 78.
  • gear 62 to 65 is adapted so that it is necessary to carry out at least two turns of cylinder 3 in the opposite direction to the advance of the paper for a selection to be effective and like the circumference of the cylinder 3 corresponds approximately to the half-length of a sheet of A4 format paper, it is in any case possible to go back with cylinder 3 to correct or complete a previously printed line, without triggering a new selection and extraction cycle.
  • the introduction of a sheet requires a single movement of the cylinder 3 in a direction opposite to the advance of the paper to make the selection of the paper.
  • the cylinder is then driven in the normal direction of introduction of the paper.
  • the two stops of the drive motor controlled by the unit 130 ensure an unimpeded fall of the paper and a closing of the drive rollers 29, 30 in the stationary position of the sheet. It is understood that these two stops are not essential, if the shape of the cam 90 is chosen so that the paper has sufficient time to fall on the alignment stop 27 before the roller 30 rests on the roller 29 and so that the stop 27 is retracted immediately after the contact of the two transport rollers 29, 30.
  • the transport mechanism 28 picks up this sheet in a predetermined position to introduce it in a controlled manner into the printer, thus ensuring exact positioning of the sheet on the striking cylinder 3.

Description

La présente invention concerne un dispositif d'alimentation en feuilles pour imprimante ou machine à écrire comprenant un châssis, un ou plusieurs supports sur lesquels les feuilles à imprimer sont stockées en pile, un mécanisme d'extraction, associé à chacun des supports, destiné à extraire une feuille du support en vue de son introduction dans l'imprimante, et un mécanisme de sélection destiné à activer un des mécanismes d'extraction, le mécanisme de sélection et les mécanismes d'extraction étant entraînés par un organe d'entraînement du cylindre de frappe de l'imprimante suivant deux directions opposées.The present invention relates to a sheet feeding device for printer or typewriter comprising a frame, one or more supports on which the sheets to be printed are stored in a stack, an extraction mechanism, associated with each of the supports, intended for extracting a sheet from the support for insertion into the printer, and a selection mechanism intended to activate one of the extraction mechanisms, the selection mechanism and the extraction mechanisms being driven by a cylinder drive member from the printer in two opposite directions.

On connaît déjà ce mode de construction par le brevet allemand DE 2.950.707. Le dispositif décrit dans ce brevet comprend un mécanisme de sélection entraîné par le cylindre de frappe permettant d'activer l'un des mécanismes d'extraction du papier en entraînant le cylindre de frappe d'abord sur une distance prédéterminée dans un papier sens opposé à l'introduction du papier, en inversant le sens d'entraînement sur une petite distance prédéterminée, en entraînant ensuite le cylindre de nouveau suivant le premier sens pour faire avancer la feuille jusqu'au cylindre de frappe et en inversant une troisième fois le sens d'entraînement du cylindre de frappe pour introduire le papier dans l'imprimante. Ce mode de fonctionnement est compliqué. En outre, lorsqu'une feuille introduite dans l'imprimante est partiellement imprimée et l'opérateur désire compléter ou corriger une ligne préalablement écrite, le dispositif décrit dans ce brevet allemand ne permet de revenir en arrière que de quelques lignes, sans quoi l'un des mécanismes d'extraction est entraîné pour faire avancer une feuille vers l'imprimante ce qui peut perturber le fonctionnement du dispositif.This construction method is already known from the German patent DE 2,950,707. The device described in this patent includes a selection mechanism driven by the striking cylinder enabling one of the paper extraction mechanisms to be activated by first driving the striking cylinder over a predetermined distance in a paper opposite to the introduction of the paper, by reversing the drive direction over a small predetermined distance, then driving the cylinder again in the first direction to advance the sheet to the striking cylinder and by reversing the direction d a third time drive the striking cylinder to feed the paper into the printer. This mode of operation is complicated. In addition, when a sheet inserted in the printer is partially printed and the operator wishes to complete or correct a line previously written, the device described in this German patent allows to go back only a few lines, otherwise the one of the extraction mechanisms is driven to advance a sheet towards the printer which can disturb the operation of the device.

Le dispositif selon la présente demande a pour but de remédier à ces inconvénients et il est caractérisé à cet effet en ce que le mécanisme de sélection comprend un levier de sélection entraîné par l'organe d'entraînement et une pièce de guidage coopérant avec une portion du levier de sélection, cette pièce de guidage comportant une glissière de sélection coopérant avec ladite portion et un nombre de voies de guidage pour cette portion au moins égal au nombre de mécanismes d'extraction, le dispositif comportant, associée à chacune des voies de guidage une pièce de commande d'extraction agencée de façon à coopérer avec le levier de sélection, chacune des voies de guidage comportant une ouverture par laquelle elle communique avec la glissière de sélection, le levier de sélection étant sollicité par un élément élastique dans une position de repos à partir de laquelle il est entraîné selon une première direction en suivant la glissière de sélection vers lesdites ouvertures, qui sont agencées de façon que ladite portion suive une des voies de guidage, lorsque le levier de sélection est déplacé suivant une seconde direction opposée à la première pour coopérer avec une des pièces de commande d'extraction.The device according to the present application aims to remedy these drawbacks and it is characterized for this purpose in that the selection mechanism comprises a selection lever driven by the drive member and a guide piece cooperating with a portion of the selection lever, this guide piece comprising a selection slide cooperating with said portion and a number of guide tracks for this portion at least equal to the number of extraction mechanisms, the device comprising, associated with each of the guide tracks an extraction control part arranged so as to cooperate with the selection lever, each of the guide tracks having an opening through which it communicates with the selection slide, the selection lever being urged by an elastic element in a position of rest from which it is driven in a first direction following the selection slide towards said openings, which are arranged es so that said portion follows one of the guide tracks, when the selection lever is moved in a second direction opposite to the first to cooperate with one of the extraction control parts.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution du dispositif objet de l'invention.

  • La figure 1 est une vue latérale en coupe représentant l'ensemble du dispositif monté sur une imprimante.
  • La figure 2 est une vue latérale illustrant des particularités du dispositif.
  • La figure 3 est une vue en coupe suivant C de la figure 2.
  • La figure 4 est une vue en coupe suivant D de la figure 2, certains éléments n'étant pas illustrés pour des raisons de clarté.
The accompanying drawing shows, by way of example, an embodiment of the device which is the subject of the invention.
  • Figure 1 is a side sectional view showing the entire device mounted on a printer.
  • Figure 2 is a side view illustrating features of the device.
  • FIG. 3 is a sectional view along C of FIG. 2.
  • Figure 4 is a sectional view along D of Figure 2, some elements not being illustrated for reasons of clarity.

En référence à la figure 1, le dispositif d'alimentation en feuilles 1 est monté sur une imprimante 2 ou machine à écrire comprenant un cylindre de frappe 3 et un chariot mobile 4 déplaçable le long du cylindre et portant un dispositif d'écriture 5, tel qu'une tête à aiguilles ou un disque à caractères. Un arbre moteur 6 relié à un moteur d'entraînement de préférence du type pas à pas, non illustré, entraîne le cylindre 3. Des rouleaux de contre-pression, dont seulement un 7 est représenté, sont sollicités élastiquement contre le cylindre et constituent un mécanisme d'entraînement 25 permettant de faire avancer de façon connue une feuille de papier introduite dans l'imprimante.With reference to FIG. 1, the sheet feeding device 1 is mounted on a printer 2 or typewriter comprising a striking cylinder 3 and a movable carriage 4 movable along the cylinder and carrying a writing device 5, such as a needle head or a character disc. A drive shaft 6 connected to a drive motor preferably of the stepping type, not illustrated, drives the cylinder 3. Back pressure rollers, of which only one 7 is shown, are elastically biased against the cylinder and constitute a drive mechanism 25 for advancing in a known manner a sheet of paper introduced into the printer.

Le dispositif d'alimentation 1 comprend un châssis 40 dont les parois latérales 41 présentent des encoches 42 s'adaptant sur l'arbre 43 du cylindre de frappe 3. La base 44 du châssis repose sur la partie arrière de l'imprimante 2. Le dispositif d'alimentation 1 comporte des supports 8 et 9 sur lesquels les feuilles 11 à imprimer sont stockées. Ces supports comprennent des cassettes 12 et 13, susceptibles d'être posées sur des plaques de maintien 14, 15 et d'être retirées de ces emplacements. Les cassettes 12, 13, de forme rectangulaire, comportent un fond 16 et des parois latérales 17, 17a. Ces dernières possèdent à leur partie supérieure des organes de retenue 18, 18a, sous forme de rebords destinés à retenir les feuilles 11 posées sur une plaque de support 19. Cette plaque 19 est sollicitée dans sa partie inférieure par un ressort 20 en direction des organes de retenue 18. A sa partie supérieure, la plaque 19 est maintenue sensiblement en contact avec le fond 16.The feed device 1 comprises a chassis 40, the side walls 41 of which have notches 42 which fit on the shaft 43 of the striking cylinder 3. The base 44 of the chassis rests on the rear part of the printer 2. The feeding device 1 comprises supports 8 and 9 on which the sheets 11 to be printed are stored. These supports include cassettes 12 and 13, which can be placed on retaining plates 14, 15 and be removed from these locations. The cassettes 12, 13, of rectangular shape, have a bottom 16 and side walls 17, 17a. The latter have at their upper part retaining members 18, 18a, in the form of flanges intended to retain the sheets 11 placed on a support plate 19. This plate 19 is biased in its lower part by a spring 20 in the direction of the members retainer 18. At its upper part, the plate 19 is kept substantially in contact with the bottom 16.

Un mécanisme d'extraction 21, 22, est associé à chacun des supports 8,9 et sert à décaler et à extraire la feuille la plus haute de la pile de feuilles 11 et de la transporter par un canal 23, 24 jusqu'à un dispositif d'entraînement de papier 25. Tel que décrit en détail plus loin, ce mécanisme est agencé de façon à transporter la feuille vers le haut à l'aide d'un rouleau 26. Le bord inférieur de la feuille se dégage alors des organes de retenue 18 et la feuille, butant contre la paroi supérieure 17a de la cassette, forme une poche 10. Le rouleau 26 entraîne ensuite la feuille dans la direction opposée. Le bord inférieur passe par dessus les organes de retenue 18 et la poche 10 est supprimée. Le rouleau 26 est alors dégagé de la feuille qui tombe en chute libre sur une butée d'alignement 27. Un dispositif de transport 28, constitué par deux rouleaux 29, 30, est alors rendu actif pour introduire la feuille de façon contrôlée dans l'imprimante 2 où elle est reprise par le dispositif d'entraînement 25.An extraction mechanism 21, 22, is associated with each of the supports 8, 9 and serves to shift and extract the tallest sheet from the stack of sheets 11 and to transport it through a channel 23, 24 to a paper driving device 25. As described in detail below, this mechanism is arranged so as to transport the sheet upwards using a roller 26. The lower edge of the sheet then emerges from the members retainer 18 and the sheet, abutting against the upper wall 17a of the cassette, forms a pocket 10. The roller 26 then drives the sheet in the opposite direction. The lower edge passes over the retaining members 18 and the pocket 10 is eliminated. The roller 26 is then released from the sheet which falls in free fall on an alignment stop 27. A transport device 28, constituted by two rollers 29, 30, is then made active to introduce the sheet in a controlled manner into the printer 2 where it is taken up by the drive device 25.

Le dispositif 1 comprend en outre deux supports 31 et 32 destinés au stockage des feuilles imprimées. Après l'impression, ces dernières passent dans le canal de sortie 33, où elles sont entraînées par le dispositif de transport 34 constitué également par deux rouleaux d'entraînement 35 et 36 pour être déposées en ordre normal sur le support 31 ou en suite inversée sur le support 32. La paroi 45 séparant les deux supports est montée à cet effet de façon pivotante autour d'un pivot 46. Une manette 48 permet de bloquer cette paroi 45 dans une position donnée. La tranche inférieure 47 de la paroi 45 présente deux surfaces de guidage conduisant les feuilles à la sortie du canal 33 soit à gauche sur le support 31 soit à droite sur le support 32.The device 1 further comprises two supports 31 and 32 intended for the storage of the printed sheets. After printing, the latter pass through the outlet channel 33, where they are entrained by the transport device 34 also consisting of two drive rollers 35 and 36 to be deposited in normal order on the support 31 or in reverse on the support 32. The wall 45 separating the two supports is mounted for this purpose so pivoting around a pivot 46. A lever 48 makes it possible to block this wall 45 in a given position. The lower edge 47 of the wall 45 has two guide surfaces leading the sheets to the outlet of the channel 33 either to the left on the support 31 or to the right on the support 32.

Le support 32 peut également être utilisé comme support pour l'alimentation en enveloppes à imprimer. Il possède, à cet effet, dans sa partie inférieure, un canal 49 adapté de façon à conduire les enveloppes vers le cylindre 3. Un mécanisme d'extraction 50 est disposé à la partie inférieure du support 32 et permet de décaler et d'entraîner l'enveloppe la plus basse d'une pile posée sur le support 32. La pile d'enveloppe est maintenue par des galets 51 disposés sur une barre transversale fixée à l'extrémité d'un levier coudé 52 monté pivotant autour d'un pivot 53. Les galets 51 sont sollicités par un ressort 54 en direction de la paroi arrière du support 32. Au cas où ce support est utilisé comme réservoir pour les feuilles déjà imprimées, les galets 51 reposent sur cette paroi de façon à obstruer l'entrée du canal 49.The support 32 can also be used as a support for feeding envelopes to be printed. It has, for this purpose, in its lower part, a channel 49 adapted so as to drive the envelopes towards the cylinder 3. An extraction mechanism 50 is arranged at the lower part of the support 32 and makes it possible to offset and to drive the lowest casing of a stack placed on the support 32. The casing stack is held by rollers 51 arranged on a transverse bar fixed to the end of an elbow lever 52 pivotally mounted around a pivot 53. The rollers 51 are biased by a spring 54 in the direction of the rear wall of the support 32. If this support is used as a reservoir for the sheets already printed, the rollers 51 rest on this wall so as to obstruct the entry from channel 49.

En référence aux figures 2 à 4, le dispositif d'alimentation comprend un mécanisme de sélection 55 destiné à activer selon le choix de l'utilisateur un des mécanismes d'extraction 21,22, 50. Ce mécanisme de sélection 55 comprend un levier de sélection 56 monté pivotant à une des extrémités d'un bras de sélection 57 dont l'autre extrémité est solidaire d'une douille 66 montée de façon tournante autour d'un arbre 58. Une pièce de guidage 59 coopère avec un doigt 60 traversant l'extrémité du levier de sélection 56. Un ressort 61 a relie le levier 56 au bras 57 de façon à solliciter le doigt 60 contre la pièce de guidage 59. Le bras 57 est entraîné par le cylindre de frappe 3 grâce à une série d'engrenages 61 à 65 de façon que le bras 57 pivote dans le même sens autour de l'arbre 58 que le cylindre 3 autour de l'arbre 43. La roue dentée 65, montée pivotante autour de l'arbre 58, comprend une douille 67 reliée par un dispositif d'accouplement à roue libre à la douille 66 solidaire du bras de sélection 57. Le dispositif d'accouplement est constitué par un embrayage à ressort 68. Une extrémité du ressort spiralé d'embrayage 68 est fixé rigidement à la douille 66, tandis que l'autre extrémité est enroulée autour de la douille 67 et comporte un prolongement 69. Le bras de sélection 57 est sollicité par un ressort 70 dans une position de repos, dans laquelle le doigt 60 est maintenu contre une butée 71 de la pièce de guidage 59. L'enroulement du ressort spiralé d'embrayage 68 est tel que les douilles 66 et 67 sont accouplées, lorsque la roue 65 tourne dans un sens senestre. La douille 67 peut par contre continuer à tourner dans un sens dextre, lorsque le levier de sélection 56 est arrêté par la butée 71. Dans le cas illustré à la figure 2, cet enroulement du ressort 68 doit donc être dextre. Le prolongement 69 du ressort est susceptible d'entrer en contact avec une butée constituée par un arbre 82 et est bloqué par ce dernier, lorsque la roue dentée 65 tourne dans un sens senestre. Ce blocage du prolongement 69 a pour effet d'ouvrir légèrement le ressort 68 enroulé autour de la douille 67 et de désaccoupler le bras de sélection 57 du dispositif d'entraînement 61 à 65.With reference to FIGS. 2 to 4, the supply device comprises a selection mechanism 55 intended to activate, according to the user's choice, one of the extraction mechanisms 21, 22, 50. This selection mechanism 55 comprises a lever selection 56 pivotally mounted at one end of a selection arm 57, the other end of which is integral with a bushing 66 rotatably mounted around a shaft 58. A guide piece 59 cooperates with a finger 60 passing through the end of the selection lever 56. A spring 61 a connects the lever 56 to the arm 57 so as to urge the finger 60 against the guide piece 59. The arm 57 is driven by the striking cylinder 3 thanks to a series of gears 61 to 65 so that the arm 57 pivots in the same direction around the shaft 58 as the cylinder 3 around the shaft 43. The toothed wheel 65, pivotally mounted around the shaft 58, comprises a bush 67 connected by a freewheel coupling device to the socket 66 secured to the arm d e selection 57. The coupling device consists of a spring clutch 68. One end of the spiral clutch spring 68 is rigidly fixed to the sleeve 66, while the other end is wound around the sleeve 67 and comprises an extension 69. The selection arm 57 is biased by a spring 70 in a rest position, in which the finger 60 is held against a stop 71 of the guide piece 59. The winding of the spiral clutch spring 68 is such that the sockets 66 and 67 are coupled, when the wheel 65 rotates in a sinister direction. The sleeve 67 can on the other hand continue to rotate in a dextrous direction, when the selection lever 56 is stopped by the stop 71. In the case illustrated in FIG. 2, this winding of the spring 68 must therefore be dextrous. The extension 69 of the spring is capable of coming into contact with a stop constituted by a shaft 82 and is blocked by the latter, when the toothed wheel 65 rotates in a sinister direction. This blocking of the extension 69 has the effect of slightly opening the spring 68 wound around the sleeve 67 and of uncoupling the selection arm 57 from the drive device 61 to 65.

La pièce de guidage 59 du mécanisme de sélection comprend une glissière de sélection 72, le long de laquelle le doigt 60 est guidé lorsque le levier de sélection tourne dans un sens senestre, et un nombre de voies de guidage 73 à 75 égal au nombre de mécanismes d'extraction 21, 22, 50.The guide piece 59 of the selection mechanism comprises a selection slide 72, along which the finger 60 is guided when the selection lever rotates in a sinister direction, and a number of guide channels 73 to 75 equal to the number of extraction mechanisms 21, 22, 50.

La glissière de sélection 72 et les voies de guidage 73 à 75 sont constituées par des secteurs de cercles concentriques. L'axe de rotation du bras de sélection 57 est confondu avec le centre de ces cercles concentriques. Les voies de guidage 73 à 75 comportent des ouvertures 73a, 74a, 75a communiquant avec la glissière de sélection 72 de façon que le doigt 60 puisse suivre l'une des voies de guidage lorsque le levier 56 est entraîné dans le sens opposé. C'est donc l'amplitude du déplacement du levier 56 dans la direction senestre qui détermine la voie de guidage suivie par le doigt 60. Le dispositif d'alimentation comprend, associée à chacune des voies de guidage, une pièce de commande d'extraction, tel que les bascules 76 à 78. Ces bascules 76 à 78 sont montées pivotantes sur l'arbre 82 et coopèrent par un pli avec le doigt 60, lorsque ce dernier emprunte la voie de guidage correspondante. Une rotation de l'une des bascules provoque la mise en marche du mécanisme d'extraction correspondant. Sollicitée par un ressort 79, la bascule retombe ensuite dans sa position de repos déterminée par une butée 80.The selection slide 72 and the guide tracks 73 to 75 are formed by sectors of concentric circles. The axis of rotation of the selection arm 57 coincides with the center of these concentric circles. The guide tracks 73 to 75 have openings 73a, 74a, 75a communicating with the selection slide 72 so that the finger 60 can follow one of the guide tracks when the lever 56 is driven in the opposite direction. It is therefore the amplitude of the displacement of the lever 56 in the direction of the direction which determines the guide path followed by the finger 60. The feed device comprises, associated with each of the guide paths, an extraction control part. , such as flip-flops 76 to 78. These flip-flops 76 to 78 are pivotally mounted on the shaft 82 and cooperate by a fold with the finger 60, when the latter takes the corresponding guide track. A rotation of one of the rockers causes the corresponding extraction mechanism to start. Solicited by a spring 79, the rocker then falls back into its rest position determined by a stop 80.

Pour guider le levier de sélection 56 vers sa position de repos, les voies de guidage 73 à 75 se rejoignent et communiquent avec le chemin de sélection 72 par une ouverture recouverte d'une lame élastique 81 de façon à permettre la sortie du doigt 60 en direction de la position de repos, mais interdisant toute entrée à ce doigt 60, lorsqu'il est déplacé de droite à gauche.To guide the selection lever 56 to its rest position, the guide tracks 73 to 75 meet and communicate with the selection path 72 through an opening covered with an elastic blade 81 so as to allow the output of the finger 60 in direction of the rest position, but preventing any entry to this finger 60, when it is moved from right to left.

Chacun des mécanismes d'extraction associé au supports de papier comporte une came 90 à 92. Cette came est montée de façon pivotante autour d'un pivot excentrique 93 sur un bras coudé 94 susceptible de pivoter autour d'un arbre 95. Un arrêt 96 solidaire de la came 90 coopère avec le pli 97 de la bascule 76 pour empêcher que la came 90 tourne autour du pivot 93. Un ressort 102 sollicite le bras coudé 94 contre une butée fixe 101 de façon que la périphérie de la came 90 occupe une position proche de la périphérie de la roue dentée 63b, mais ne touche pas cette périphérie, lorsque le pli 97 est en contact avec l'arrêt 96. Chacun des mécanismes d'extraction comporte en outre un levier 98 sollicité par un ressort 99, agencé entre le levier 98 et le bras coudé 94, contre une pièce 100 solidaire de la came 90 de façon à mettre en rotation la came 90, lorsque le pli 97 est dégagé de l'arrêt 96.Each of the extraction mechanisms associated with the paper supports comprises a cam 90 to 92. This cam is pivotally mounted around an eccentric pivot 93 on a bent arm 94 capable of pivoting around a shaft 95. A stop 96 integral with the cam 90 cooperates with the fold 97 of the rocker 76 to prevent the cam 90 from rotating around the pivot 93. A spring 102 biases the bent arm 94 against a fixed stop 101 so that the periphery of the cam 90 occupies a position close to the periphery of the toothed wheel 63b, but does not touch this periphery, when the fold 97 is in contact with the stop 96. Each of the extraction mechanisms further comprises a lever 98 biased by a spring 99, arranged between the lever 98 and the bent arm 94, against a part 100 integral with the cam 90 so as to rotate the cam 90, when the fold 97 is released from the stop 96.

La périphérie de la came 90 comporte une première portion 90a constituée par une denture susceptible de coopérer avec la roue dentée 63b et une seconde portion lisse 90b susceptible de glisser sur cette denture sous l'action du ressort 102.The periphery of the cam 90 comprises a first portion 90a constituted by a toothing capable of cooperating with the toothed wheel 63b and a second smooth portion 90b capable of sliding on this toothing under the action of the spring 102.

L'extrémité du bras coudé 94 est accouplée à une tirette 105 commandant des moyens de séparation 106 d'une feuille et la mise en place de la butée d'alignement 27. Cette butée d'alignement est constituée par une pièce en forme de peigne fixée entre deux bras 107 pivotant autour d'un arbre 108 fixé au châssis. Un doigt 125 solidaire de la tirette 105, engagé dans une fente de la paroi 41, est relié par un ressort 109 à l'un des bras 107.The end of the bent arm 94 is coupled to a pull tab 105 controlling means 106 for separating a sheet and fitting the alignment stop 27. This alignment stop is constituted by a comb-shaped part fixed between two arms 107 pivoting around a shaft 108 fixed to the chassis. A finger 125 secured to the pull tab 105, engaged in a slot in the wall 41, is connected by a spring 109 to one of the arms 107.

Les moyens de séparation 106 comprennent à proximité des deux parois latérales 41 un levier 110 monté sur un arbre 111 fixé au châssis et une équerre 112 pivotant également autour de l'arbre 111. Le levier 110 et l'équerre 112 sont reliés par un ressort 113 sollicitant l'équerre 112 vers une position de repos déterminée par deux butées 114 et 115 portées par le levier 110 respectivement l'équerre 112. Le rouleau 30 du mécanisme d'extraction est montée pivotant sur un arbre 116 tenu per les leviers 110. Un ressort 117 sollicite les leviers 110 dans une position telle que le rouleau 30 demeure en contact avec le rouleau 29 fixé sur un arbre 118 monté sur des paliers solidaires du châssis. Cet arbre 118 est entraîné par le cylindre de frappe 3 grâce à des engrenages 119 à 121, de façon que le rouleau 29 et le cylindre de frappe 3 tournent en sens opposé.The separation means 106 comprise, near the two side walls 41, a lever 110 mounted on a shaft 111 fixed to the chassis and a bracket 112 also pivoting around the shaft 111. The lever 110 and the bracket 112 are connected by a spring 113 urging the bracket 112 towards a rest position determined by two stops 114 and 115 carried by the lever 110 respectively the bracket 112. The roller 30 of the extraction mechanism is pivotally mounted on a shaft 116 held by the levers 110. A spring 117 biases the levers 110 in a position such that the roller 30 remains in contact with the roller 29 fixed on a shaft 118 mounted on bearings integral with the chassis. This shaft 118 is driven by the striking cylinder 3 by means of gears 119 to 121, so that the roller 29 and the striking cylinder 3 rotate in opposite directions.

Le rouleau 26 comporte un arbre 122 monté sur les équerres 112. Une roue dentée 123 solidaire de l'arbre 122 coopère avec une denture 124 en forme de segment de cercle portée par une extrémité 124 d'un des leviers 110. Lautre extrémité de ce levier 110 est agencée de façon à coopérer avec le doigt 125 solidaire de la tirette 105 pour commander un pivotement du levier 110 autour de l'arbre 111. Le dispositif comprend en outre une butée 126 destinée à fixer la position exacte de la butée d'alignement 27 lors de sa mise en place et des butées 127 pour limiter le pivotement de l'équerre 112 autour de l'arbre 111.The roller 26 comprises a shaft 122 mounted on the brackets 112. A toothed wheel 123 secured to the shaft 122 cooperates with a toothing 124 in the form of a segment of a circle carried by one end 124 of one of the levers 110. The other end of this lever 110 is arranged so as to cooperate with the finger 125 integral with the pull tab 105 to control a pivoting of the lever 110 around the shaft 111. The device further comprises a stop 126 intended to fix the exact position of the stop of alignment 27 during its installation and stops 127 to limit the pivoting of the bracket 112 around the shaft 111.

Les rouleaux 26, 29 e 30 sont recouverts d'élastomère pour assurer un entraînement par friction des feuilles de papier. Le dispositif d'alimentation en feuille peut être adapté à toute imprimante ou machine à écrire comportant une unité de commande 130 susceptible de contrôler de façon précise l'entraînement du cylindre de frappe dans les deux sens.The rollers 26, 29 and 30 are covered with elastomer to ensure a friction drive of the sheets of paper. The sheet feeding device can be adapted to any printer or typewriter comprising a control unit 130 capable of precisely controlling the drive of the striking cylinder in both directions.

Le dispositif fonctionne de la façon suivante. Lorsque l'unité de commande 130 de l'imprimante reçoit l'ordre d'introduction d'un type donné de feuilles empilées sur les supports 8, 9 et 32, elle commande une rotation du cylindre 3 dans un sens contraire à l'introduction. Le cylindre 3 entraîne per l'intermédiaire des engrenages 62 à 65 le bras 57 et le levier de sélection 56 suivant une rotation senestre. L'amplitude de cette rotation senestre détermine laquelle des voies de guidage 73 à 75 va être suivie par le doigt 60. Cette amplitude constitue donc le critère de sélection. Les engrenages 62 à 65 ont été choisis de sorte que la sélection est effectuée pour des rotations du cylindre comprises entre 2 et 2,5 tours dans la direction opposée à l'introduction du papier. Le sens d'entraînement du cylindre est ensuite inversé et le doigt 60 suit une des voies 73 à 75 pour actionner l'une des pièces de commande d'extraction, constituées par les bascules 76 à 78.The device operates as follows. When the control unit 130 of the printer receives the order to introduce a given type of sheets stacked on the supports 8, 9 and 32, it controls a rotation of the cylinder 3 in a direction opposite to the introduction . The cylinder 3 drives through the gears 62 to 65 the arm 57 and the selection lever 56 according to a sinister rotation. The amplitude of this sinister rotation determines which of the guide channels 73 to 75 will be followed by the finger 60. This amplitude therefore constitutes the selection criterion. The gears 62 to 65 were chosen so that the selection is made for cylinder rotations of between 2 and 2.5 turns in the direction opposite to the introduction of the paper. The direction of drive of the cylinder is then reversed and the finger 60 follows one of the paths 73 to 75 to actuate one of the extraction control parts, constituted by the rockers 76 to 78.

La bascule sélectionnée effectue un pivotement autour du pivot 82 et dégage l'arrêt 96. En appuyant sur la pièce 100, le bras 98, sollicité par le ressort 99, entraîne en rotation la came 90, qui du fait de son excentricité entre en contact avec la roue dentée 63b. Cette dernière est entraînée dans le même sens que le cylindre de frappe 3 et entraîne en rotation la came 90. La tirette 105 est alors déplacée dans un premier temps vers la gauche dans la figure 2 et commande successivement les opérations suivantes:

  • - Mise en place de la butée d'alignement 27.
  • - Pivotement du levier 110 et de l'équerre 112 autour de l'arbre 111, jusqu'a ce que l'équerre 112 vient en contact avec la butée 127.
  • - Le levier 110 continue son mouvement de pivotement et entraîne grâce à l'engrenage 123, 124, le rouleau 26 dans un sens senestre; en contact avec la feuille la plus haute contenue dans la cassette 13, ce rouleau déplace cette feuille par friction sur une distance de un centimètre environ vers le haut pour dégager le bord inférieur de la feuille sous les organes de retenue 18 de la cassette 13, et pour former la poche 10 (voir figure 1).
The selected lever pivots around the pivot 82 and releases the stop 96. By pressing on the part 100, the arm 98, biased by the spring 99, drives the cam 90 in rotation, which due to its eccentricity comes into contact with the gear 63b. The latter is driven in the same direction as the striking cylinder 3 and rotates the cam 90. The pull tab 105 is then first moved to the left in FIG. 2 and successively controls the following operations:
  • - Installation of the alignment stop 27.
  • - Pivoting the lever 110 and the bracket 112 around the shaft 111, until the bracket 112 comes into contact with the stop 127.
  • - The lever 110 continues its pivoting movement and drives, thanks to the gear 123, 124, the roller 26 in a semester direction; in contact with the uppermost sheet contained in the cassette 13, this roller displaces this sheet by friction over a distance of about one centimeter upward to release the lower edge of the sheet under the retaining members 18 of the cassette 13, and to form the pocket 10 (see Figure 1).

La came 90 a effectué à ce moment une rotation de 180° et commence à déplacer la tirette 105 vers la droite, contrôlant les opérations suivantes:

  • - Le levier 110 pivote dans le sens contraire, entraînant le rouleau 26 dans un sens dextre, ce dernier transporte la feuille de papier par dessus les organes 18 vers le bas.
  • - Lorsque la poche est entièrement résorbée et la feuille posée à plat, le rouleau 26 se dégage de la feuille qui tombe en chute libre sur la butée d'alignement 27.
  • - L'unité de commande 130 commande à ce moment un arrêt du moteur d'entraînement d'une durée d'une seconde environ pour assurer que cette chute s'effectue sans entrave.
  • - Après la mise en marche du moteur d'entraînement, la périphérie lisse 90b entre en contact avec la roue 63b et glisse sur cette dernière.
  • - L'unité 130 commande un nouvel arrêt du moteur d'entraînement. Pendant cet arrêt, le levier 110, sollicité par le ressort 117 continue à pivoter pour permettre la fermeture des deux rouleaux d'entraînement 29 et 30. La tirette 105 commande ensuite l'escamotage de la butée d'alignement 27 sous l'effet de la traction du ressort 102 agissant sur le bras 94. La périphérie 90a munie de la denture entre alors de nouveau en contact avec la roue dentée 63b.
  • - Le moteur d'entraînement est mis en marche pendant une durée qui est fonction de la longueur d'introduction désirée du papier et commandée par l'unité 130. Pendant cette opération, la came 90 est entraînée par la roue 63b et le bras coudé 94 vient en contact avec la butée de repos 101.
  • - Le levier 98 sollicité par le ressort 99 appuie sur la pièce 100 en écartant d'une faible distance la came 90 de la roue d'entraînement 63b et son arrêt 96 entre en contact avec le pli 97 de la bascule 76.
The cam 90 has then made a rotation of 180 ° and begins to move the pull tab 105 to the right, controlling the following operations:
  • - The lever 110 pivots in the opposite direction, driving the roller 26 in a dextrous direction, the latter transports the sheet of paper over the members 18 downwards.
  • When the pocket is fully absorbed and the sheet laid flat, the roller 26 is released from the sheet which falls in free fall on the alignment stop 27.
  • - The control unit 130 controls at this time a stop of the drive motor for a period of about one second to ensure that this fall takes place without hindrance.
  • - After starting the drive motor, the smooth periphery 90b comes into contact with the wheel 63b and slides on the latter.
  • - The unit 130 commands a new stop of the drive motor. During this stop, the lever 110, biased by the spring 117 continues to pivot to allow the closing of the two drive rollers 29 and 30. The pull tab 105 then controls the retraction of the alignment stop 27 under the effect of the traction of the spring 102 acting on the arm 94. The periphery 90a provided with the toothing then again comes into contact with the toothed wheel 63b.
  • - The drive motor is started for a period which is a function of the desired insertion length of the paper and controlled by the unit 130. During this operation, the cam 90 is driven by the wheel 63b and the bent arm 94 comes into contact with the rest stop 101.
  • - The lever 98 biased by the spring 99 presses on the part 100 by spreading the cam 90 of the drive wheel 63b a short distance and its stop 96 comes into contact with the fold 97 of the rocker 76.

Comme l'engrenage 62 à 65 est adapté de façon qu'il est nécessaire d'effectuer au moins deux tours de cylindre 3 dans la direction opposée à l'avance du papier pour qu'une sélection soit effective et comme la circonférence du cylindre 3 correspond approximativement à la demi-longueur d'une feuille de papier format A4, il est dans tous les cas possible de revenir en arrière avec le cylindre 3 pour corriger ou compléter une ligne préalablement imprimée, sans pour autant enclencher un nouveau cycle de sélection et d'extraction.As the gear 62 to 65 is adapted so that it is necessary to carry out at least two turns of cylinder 3 in the opposite direction to the advance of the paper for a selection to be effective and like the circumference of the cylinder 3 corresponds approximately to the half-length of a sheet of A4 format paper, it is in any case possible to go back with cylinder 3 to correct or complete a previously printed line, without triggering a new selection and extraction cycle.

L'introduction d'une feuille nécessite un déplacement unique du cylindre 3 dans un sens opposé à l'avance du papier pour effectuer la sélection du papier. Le cylindre est ensuite entraîné dans le sens normal d'introduction du papier. Les deux arrêts du moteur d'entraînement commandé par l'unité 130 assurent une chute sans entrave du papier et une fermeture des rouleaux d'entraînement 29, 30 en position immobile de la feuille. Il est bien entendu que ces deux arrêts ne sont pas indispensables, si la forme de la came 90 est choisie de façon que le papier ait suffisamment de temps pourtomber sur la butée d'alignement 27 avant que le rouleau 30 ne s'appuie sur le rouleau 29 et de façon que la butée 27 soit escamotée immédiatement après le contact des deux rouleaux de transport 29, 30.The introduction of a sheet requires a single movement of the cylinder 3 in a direction opposite to the advance of the paper to make the selection of the paper. The cylinder is then driven in the normal direction of introduction of the paper. The two stops of the drive motor controlled by the unit 130 ensure an unimpeded fall of the paper and a closing of the drive rollers 29, 30 in the stationary position of the sheet. It is understood that these two stops are not essential, if the shape of the cam 90 is chosen so that the paper has sufficient time to fall on the alignment stop 27 before the roller 30 rests on the roller 29 and so that the stop 27 is retracted immediately after the contact of the two transport rollers 29, 30.

Comme la poche 10 est entièrement résorbée avant que la feuille puisse tomber sur la butée d'alignement 27, la chute s'effectue de façon régulière. Le mécanisme de transport 28 reprend cette feuille dans une position prédéterminée pour l'introduire de façon contrôlée dans l'imprimante assurant donc un positionnement exact de la feuille sur le cylindre de frappe 3.As the pocket 10 is completely absorbed before the sheet can fall on the alignment stop 27, the fall takes place regularly. The transport mechanism 28 picks up this sheet in a predetermined position to introduce it in a controlled manner into the printer, thus ensuring exact positioning of the sheet on the striking cylinder 3.

Claims (9)

1. Sheet feed device for a printer (2) or typewriter comprising a frame (4), one or more supports (8, 9) on which the sheets (11) to be printed are stored in a stack, a removal mechanism (21, 22), associated with each of the supports (8, 9), intended to remove a sheet from the support for its introduction into the printer (2), and a selection mechanism (55) intended to activate one of the removal mecanisms, the selection mechanism (55) and the removal mechanisms (21, 22) being driven by the drive element (61) of the platen (3) of the printer (2) in two opposite directions, characterized in that the selection mechanism (55) comprises a selection lever (56) driven by the drive element (61) and a guide part (59) working with a portion (60) of the selection lever (56), this guide part (59) comprising a selection slide (72) working with said portion (60) and a number of guide tracks (73 to 75) for this portion (60) at least equal to the number of removal mechanisms (21, 22), the device comprising, associated with each of the guide tracks (73 to 75), a removal control part (76 to 78) made to work with the selection lever (56), each of the guide tracks (73 to 75) comprising an opening (73a to 75a) through which it communicates with the selection slide (72), the selection lever (56) being pulled by an elastic element (70) to a rest position from which it is driven in a first direction along the selection slide (72) to said openings, which are made so that said portion (60) follow one of the guide tracks (73 to 75), when the selection lever (56) is moved in a second direction opposite the first to work with one of the removal control parts (76 to 78).
2. Device according to claim 1, characterized in that the device is made so that a movement of the selection lever (56) in said first direction corresponds to a rotation of the platen (3) in the direction opposite the introduction of the paper, the selection lever (56) working with one of the removal control parts (76 to 78) when the platen (3) turns in the direction of introduction of the paper.
3. Device according to one of claims 1 or 2, characterized in that the device comprises an elastic element (61 a) made to pull said portion (60) of the selection lever on one of the guide tracks (73 to 75) when the lever is moved in said second direction.
4. Device according to one of claims 1 to 3, characterized in that the selection slide (72) and the guide tracks (73 to 75) consist of sectors of concentric circles, the selection lever (56) being mounted at one of the ends of a selection arm (57) whose other end is fastened to a pivot (58) whose axis is located approximately in the center of the concentric circles.
5. Device according to claim 4, characterized in that the selection slide (72) has a radius greater than the circles of the guide tracks (73 to 75) and in that said elastic element (61 a) consists of a spring connecting the arm (57) to the selection lever (56) to pull said portion (60) of the selection lever in a direction approximately radial to the selection slide (72).
6. Device according to one of claims 1 to 5, characterized in that the guide tracks (73 to 75) are shaped to bring the selection lever (56) to its rest position, when it is driven in said second direction.
7. Device according to claim 2, comprising a gear (61 to 64) between the platen (3) and a toothed wheel (65) intended to drive the selection lever (56), characterized in that this gear (61 to 64) is so shaped that the periphery of the platen (3) makes a movement, in a first direction, approximately equal to the length of the sheets to be printed, before the selection lever (56) has reached one of said openings communicating with one of the guide tracks (73 to 75).
8. Device according to claim 7, characterized in that it comprises an overriding clutch (66 to 69) between said toothed wheel (65) and the selection lever (56) made to couple the toothed wheel (65) to this lever (56), when the platen (3) turns in said first direction, and a stop (71) intended to hold the selection lever (56) in its rest position when the platen (3) turns in the opposite direction.
9. Device according to claim 8, characterized in that the clutch (66 to 69) comprises an element (69) able to uncouple the selection lever (56) from the toothed wheel (65), this element (69) working with a stationary stop (82) made so that the element (69) comes in contact with the stop (82) when the selection lever (56) is driven in said first direction over a predetermined amplitude greater than the distance separating the rest position from the farthest opening.
EP84810261A 1983-06-03 1984-05-28 Sheet feeding device for a printer or a typewriter Expired EP0128866B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3056/83 1983-06-03
CH3056/83A CH654254A5 (en) 1983-06-03 1983-06-03 SHEET FEEDING DEVICE FOR PRINTER OR WRITING MACHINE.

Publications (2)

Publication Number Publication Date
EP0128866A1 EP0128866A1 (en) 1984-12-19
EP0128866B1 true EP0128866B1 (en) 1986-12-10

Family

ID=4247624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84810261A Expired EP0128866B1 (en) 1983-06-03 1984-05-28 Sheet feeding device for a printer or a typewriter

Country Status (5)

Country Link
US (1) US4564187A (en)
EP (1) EP0128866B1 (en)
JP (1) JPS59227633A (en)
CH (1) CH654254A5 (en)
DE (1) DE3461622D1 (en)

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US4717136A (en) * 1984-11-02 1988-01-05 Albert Rutishauser Process and apparatus for feeding in of recording carriers to the writing roller of an office machine
JPH07106801B2 (en) * 1985-07-31 1995-11-15 セイコーエプソン株式会社 Paper feeder
JPH0674097B2 (en) * 1985-11-08 1994-09-21 ブラザー工業株式会社 Printer paper feeder
US4729683A (en) * 1986-01-24 1988-03-08 Ziyad Incorporated Paper sheet feeding apparatus
DE3607080A1 (en) * 1986-03-04 1987-09-10 Mannesmann Ag DEVICE FOR PAPER TRANSPORT IN PRINTERS WITH BAR-SHAPED PRINT REAR, IN PARTICULAR IN MATRIX PRINTERS
DE3708601A1 (en) * 1986-03-18 1987-10-01 Canon Kk Paper feed device for a recording apparatus
FR2596703B1 (en) * 1986-04-08 1988-07-08 Sagem PRINTING MACHINE EQUIPPED WITH A DEVICE FOR SELECTIVELY FEEDING PRINTED SHEETS DISTRIBUTED IN TWO LOADING TRAYS
US4729680A (en) * 1986-06-09 1988-03-08 Xerox Corporation Selector latch for a sheet feeder
US4795145A (en) * 1986-09-22 1989-01-03 Centronics Data Computer Corporation Cut sheet paper mechanism
US4848944A (en) * 1986-09-22 1989-07-18 Genicom Corporation Printer paper feed mechanism
JPS63162736U (en) * 1987-04-10 1988-10-24
JPS63288837A (en) * 1987-05-18 1988-11-25 Seiko Epson Corp Paper feeder
US4940348A (en) * 1988-09-15 1990-07-10 International Business Machines Corporation Platen controlled sheetfeed permitting back-up for erasure
US5073055A (en) * 1988-11-11 1991-12-17 Brother Kogyo Kabushiki Kaisha Sheet-feed/sheet-receiving unit used in combination with printer
JP2641642B2 (en) * 1991-05-24 1997-08-20 富士写真フイルム株式会社 Sheet feeder
JP3362444B2 (en) * 1993-05-14 2003-01-07 ソニー株式会社 Printer
US5713674A (en) * 1994-10-06 1998-02-03 Pfu Limited Paper feed method and apparatus for a printer
US5642952A (en) * 1995-07-06 1997-07-01 Brother Kogyo Kabushiki Kaisha Sheet-supply unit capable of controlling sheet-feed operations and sheet alignment operations using a single solenoid
US8061704B1 (en) * 2010-10-29 2011-11-22 Lexmark International, Inc. Apparatus for feeding compressible media in an image forming device with rotation limiting stop

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Also Published As

Publication number Publication date
JPS59227633A (en) 1984-12-20
US4564187A (en) 1986-01-14
EP0128866A1 (en) 1984-12-19
CH654254A5 (en) 1986-02-14
DE3461622D1 (en) 1987-01-22

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