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EP0013720B1 - Device for regulating the supply of paper to a printing-platen - Google Patents

Device for regulating the supply of paper to a printing-platen Download PDF

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Publication number
EP0013720B1
EP0013720B1 EP79104887A EP79104887A EP0013720B1 EP 0013720 B1 EP0013720 B1 EP 0013720B1 EP 79104887 A EP79104887 A EP 79104887A EP 79104887 A EP79104887 A EP 79104887A EP 0013720 B1 EP0013720 B1 EP 0013720B1
Authority
EP
European Patent Office
Prior art keywords
driving means
platen
cam
paper
channel
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
EP79104887A
Other languages
German (de)
French (fr)
Other versions
EP0013720A1 (en
Inventor
Ronald Eugene Hunt
Ernest George Souliere
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0013720A1 publication Critical patent/EP0013720A1/en
Application granted granted Critical
Publication of EP0013720B1 publication Critical patent/EP0013720B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices 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
    • B41J13/26Registering devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices 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
    • B41J13/02Rollers
    • B41J13/03Rollers driven, e.g. feed rollers separate from platen

Definitions

  • the present invention relates generally to the handling of paper in a printer with a cylindrical platen and more particularly a device for controlling the alignment of the paper, of the supply thereof by the rear and front rollers cooperating with the platen and opening and closing the paperweight rod.
  • control structure does not bear any resemblances to that described in said publication.
  • device that can be controlled by said control structure is different from said publication.
  • This mechanism of the prior art although it facilitates the operation of the feed rollers when the operator has to place a sheet in the machine, does not facilitate or automate the various other operations necessary for the establishment of the sheet.
  • the positioning of the sheet requires the execution, in a well-determined sequence, of various other operations, such as aligning the paper with respect to the platen, removing the paperweight rod, the rotation of the platen to advance the paper to the first printing line and the replacement of the paperweight rod.
  • the subject of the present invention is a device by which the operations necessary for placing the sheet of paper in a typewriter or printer are carried out automatically in the appropriate sequence, the only tasks remaining to be performed manually by the operator being the introduction of the sheet of paper until its front edge abuts on an alignment member and the operation of a control button which triggers the appropriate sequence of operations necessary for the establishment of the sheet of paper.
  • the device according to the present invention comprises, as is the case for the device described in the aforementioned document US-A-2 121 853, a cylindrical plate selectively driven in rotation by a first drive means, as well as rollers of 'front and rear power supply mounted. on a cradle which can pivot to bring the rollers in contact with the plate or move them away from it.
  • the cradle is driven by a second drive means by means of coupling means.
  • a control button, or cycle initiating means allows the operator to initiate an operating cycle of the second drive means, a cycle during which the roller cradle moves from a first to a second position and returns to its first position.
  • the control device is formed of a modular unit 1 ( Figure 1) and a flexible comb 20 ( Figure 2).
  • Unit 1 is mounted at one end of the chassis 2 of a printer by means of a support 3 which also carries a drive motor 4 having a motion transmission shaft 5 with worm screw 6.
  • the support 3 carries also an axis 7 on which a pinion 8 with cam is rotatably mounted.
  • the pinion 8 has teeth 9, on its periphery, which mesh with the endless screw 6.
  • the front face of the pinion 8 comprises an integral cam 10 whose guide surface 11 is intended to control the paperweight rod.
  • the outer face of the cam 10 has a stud 19 which projects in the vicinity of its outer periphery.
  • This stud 19 is movable in a buttonhole 12 formed in an arm 13 of the flexible comb 20.
  • the lower end of the arm 13 is fixed to a rod 14 rotatably mounted in the chassis of the printer 2.
  • the rod 14 is an element of the flexible comb 20 which has teeth 15, 16, 17, etc. (see Figure 8).
  • the rod 14 has a groove 18 in which is fixed a flexible blade in which are cut radial tongues forming the teeth 15, 16, 17, etc. of the flexible comb 20.
  • An axis 21 is mounted in the printer chassis 2.
  • An arm 22 is pivotally mounted on the axis 21 and includes a cam follower 23 whose end follows the guide surface 11 of the cam pinion 8 for driving the arm 22 in rotation in a first and in a second direction.
  • the arm 22 and the rod 21 are not mounted on the support 3.
  • An axis 25, oriented towards the outside, is mounted in the upper part 24 of the support 3 and carries the arm 26 of a rocking button 31 and a restoration spring 27.
  • a support 28 of the rocking button, comprising contact surfaces 29 and 30 is integral with the upper part of the arm 26.
  • the tilting button 31 is mounted on the upper part of the support 28.
  • the spring 27 is biased by one of the surfaces 29 or 30 along the end 32 or 33 which has been pressed in by the operator.
  • the spring 27 recalls the arm 26 and the rocking button 31 in their position shown.
  • An axis 34 oriented towards the outside is also mounted on the support 3 and passes through a curved buttonhole 35 formed in the arm 26.
  • This buttonhole 35 is located below the axis 25 and its ends 36 and 36 limit tilting or the rotation of the control button 31 and of the arm 26.
  • a shunt leg 38 and a magnet-carrying leg 39 are integral with the arm 26.
  • a permanent magnet 41 is fixed to an outer end 40 of the leg 39.
  • the support 3 also carries a switching assembly 42 on which are mounted blade switches 43 and 44.
  • the blade switches 43 and 44 are connected to the input / output conductors 45, 46 and 47.
  • signals are applied to conductors 45, 46 and 47 to start and stop the motor 4 and to start and stop a drive motor not shown. These two motors are activated at different times.
  • a curved magnet 80 is embedded in the rear face of the pinion 8 and can be positioned, by the rotation of said pinion 8 relative to the reed switch 43 to cut the motor 4 and start the platen drive motor.
  • the comb 20 is designed to be installed in a device 50.
  • the device 50 is composed of a platinum cradle 51 and yokes such as 52 and 53 which are identical; we therefore only describe the yoke 52.
  • the yoke 52 is integral with the cradle 51 and has two legs 54 and 55 oriented downward which form between them a passage 56 provided for receiving an axis 57 whose ends are mounted in the chassis d printer 2.
  • the device 50 rotates around the axis 57 under the action of the teeth 15 of the comb 20 coming into contact with the contact surfaces 58 and 59 of the legs 54 and 55.
  • the cradle 51 has three windows.
  • the front feed roller 60 is arranged in one of them and in another is arranged the rear feed roller 61.
  • a paper alignment unit 62 can be arranged in the third window of the cradle 51.
  • a element 63 oriented downwards is fixed to the cradle 51 and carries an axis 64 on which a reference 65 is rotatably mounted.
  • the paper alignment element 62 is integral with the reference 65 which has a leg 66 oriented downwards which has a contact surface 67 which is biased by the tooth 16 to cause the positioning of the paper alignment element 52 with respect to the printer platen 68.
  • the front feed roller 60 is arranged so as to cause the application of the paper 71 against the platen 68. So that the roller 60 is in this position; the comb 20 must have been rotated counterclockwise and the tooth 15 must be in contact with the surface 58. In this position of the tooth 15, the device 50 is kept in the position of FIG. 4 At this instant, the alignment element 62 is in contact with the paper 71 and presses it against the plate 68. After the sheet 71 has been advanced to the first writing line, another sheet 72 can be inserted into the printer from the back of the plate 68.
  • the second clockwise arc allows the tooth 15 to come into contact with the surface 59 and causes the device 50 to rotate counterclockwise.
  • the rear feed roller 61 is driven towards the platen 58 to cause the application of the paper 71 against said platen 68.
  • the third arc of rotation in the clockwise direction of the comb 20 allows the tooth 16 to come in contact with the surface 67 of the leg 66 of the reference 65 to separate the alignment element 62 'from the plate 68.
  • the first arc of counterclockwise rotation of the comb 20 after its third arc of clockwise rotation causes the tooth 16 to separate from the surface 67.
  • the alignment element 62 is released or authorized to move towards the plate 68 under the stress of a spring not shown.
  • the second counter-clockwise rotation arc of the comb 20 causes the tooth 15 to separate from the surface 59, which allows the roller 61 to be moved away from the plate 58.
  • the third anti-clockwise rotation arc -comb of the comb 20 brings the tooth 15 into contact with the surface 58 to apply the front feed roller 60 against the plate 68 and thus cause the contact of the paper 71 and the plate.
  • the rear feed roller 61 is removed from the stage 68 and the alignment element 62 is in contact with it. This allows the front edge 73 of the sheet 71 to pass between the roller 61 and the plate 68.
  • the front edge 73 is brought into abutment against the element ' 62 to align the sheet 71. After aligning the edge front 73 against the alignment element 62, this must be distant from the plate 68 to allow a continuous passage for the sheet 71 around the plate 68.
  • the rear feed roller 61 must be applied against the plate 68 to cause the sheet 71 and said plate 68 to come into contact. Then, the plate 68 is rotated until the front edge 73 has passed the feed roller before 60 and the sheet 71 is arranged at the first printing line. After the paper 71 has thus been advanced, the alignment member 62 is pressed against the platen 68 to hold the sheet 71 in position while the rear feed roller 61 is away from the platen 68 and the front roller 60 is applied against it. The application of the front roller 60 against the platen 68 causes the sheet 71 to contact the platen and allows the sheet to be fed during printing.
  • the first table A relates to a paper loading operation which begins with the introduction of the paper and ends with the positioning of said paper at the first printing line.
  • the second table B relates to an operation for removing the paper from the platen to allow the execution of an adjustment by the operator or the removal of the paper from the printer.
  • the initial loading operation begins with the introduction of a sheet of paper 71 into the printer from the rear of the platen 68.
  • the alignment element paper 62 must be in contact with the plate 68 and the rear feed roller 61 must be released from the latter.
  • the advent edge 73 of the latter is therefore aligned against the alignment element 62.
  • the end 33 of the rocking button 31 is momentarily depressed, which causes the switch to close.
  • the rotation of the motor 4 drives the comb 20 in a clockwise rotation to apply the rear roller 61 against the plate 68 in order to cause the paper to be tightened 71 against the plate 68.
  • the alignment element 62 will be released from the plate 68.
  • the rotation of the pinion 8 continues until the magnet 80 embedded in the rear side of the pinion 8 arrives in a position causing the opening of the reed switch 43, which cuts the motor 4 and causes the application of signals to lines 45 to 47 towards a motor for driving in rotation of the plate 68.
  • the plate is driven in rotation on a certain arc by a stepping motor, a servomotor or other similar motor e, until the front edge 73 has advanced sufficiently to allow the printing of the first line on the sheet 71.
  • the drive motor of the stage is then stopped and a signal or signals are again applied by lines 45 to 47 to restart the motor 4.
  • the paperweight rod 74 fixed to the arm 22 has been rotated counterclockwise around the axis 21 to release it from the plate 68.
  • the paperweight rod 74 must be engaged against the plate 68 to apply the front part 81 of the sheet 71 on the plate 68.
  • FIGS. 3 and 4 The position and the state of the elements composing the device of the present invention at the moment when the plate 68 is rotated to advance the front part 81 to a first writing line, are shown in Figures 5 and 6.
  • the elements s making up the device of the present invention must be in the positions and states shown in FIGS. 3 and 4 for feeding by the front roller of the sheet 71 during the rotation of the plate 68 for printing.
  • Table B describes en detait a paper release operation for which the front feed rollers 60 and rear 61 must be released from the plate 68.
  • the positions and states of the elements making up the device of the present invention should be those of the figures 1 and 2. The order of operations is noted in parentheses in the table.
  • the motor 4 is started for a predetermined time, then it is switched off. This is due to the application of a signal or signals on lines 45 to 47. This operating period is determined by logic not shown. Similarly, a logic which is not shown controls the starting of the drive motor of the plate on a given arc, then, in sequence, the restarting of the motor 4.

Landscapes

  • Handling Of Sheets (AREA)
  • Handling Of Cut Paper (AREA)

Description

Domaine techniqueTechnical area

La présente invention concerne de façon générale la manipulation du papier dans une imprimante à platine cylindrique et plus particulièrement un dispositif de commande de l'alignement du papier, de l'alimentation de celui-ci par les rouleaux arrière et avant coopérant avec la platine et de l'ouverture.et de la fermeture de la tige presse-papier.The present invention relates generally to the handling of paper in a printer with a cylindrical platen and more particularly a device for controlling the alignment of the paper, of the supply thereof by the rear and front rollers cooperating with the platen and opening and closing the paperweight rod.

Etat de la technique antérieureState of the prior art

L'état de la technique antérieure est illustré par les publications "IBM" Technical Disclosure Bulletins" suivantes: Vol. 15, No. 7, Décembre. 1972, page 2311; Vol. 17, No. 5, Octobre 1974, page 1263 et 1264; Vol. 18, No. 5, Octobre 1975, pages 1305 et 1306 et Vol. 21, No. 2, Juillet 1978, pages 709 et 710. Ces publications illustrent les caractéristiques générales de alimentation d'une feuille de papier, par des rouleaux avant et arrière coopérant avec une platine cylindrique, de son alignement, et de la manoeuvre de la tige presse-papier. Plus particulièrement, la publication ci-dessus en date d'Octobre 1974 décrit un dispositif remplissant les mêmes fonctions générales que celles du dispositif de la présente invention, y compris la commande partielle du dispositif par un moyen unique.The state of the prior art is illustrated by the following "IBM" Technical Disclosure Bulletins: Vol. 15, No. 7, December 1972, page 2311; Vol. 17, No. 5, October 1974, page 1263 and 1264; Vol. 18, No. 5, October 1975, pages 1305 and 1306 and Vol. 21, No. 2, July 1978, pages 709 and 710. These publications illustrate the general characteristics of feeding a sheet of paper, by front and rear rollers cooperating with a cylindrical plate, its alignment, and the operation of the paperweight rod. More particularly, the above publication dated October 1974 describes a device fulfilling the same general functions as those of the device of the present invention, including partial control of the device by a single means.

Toutefois, la structure de commande particulière selon la présente invention ne présente pas de ressemblances avec celle décrite dans ladite publication. De plus, le dispositif pouvant être commandé par ladite structure de commande est différent de ladite publication.However, the particular control structure according to the present invention does not bear any resemblances to that described in said publication. In addition, the device that can be controlled by said control structure is different from said publication.

L'état de la technique antérieure est également illustré par le document US-A-2 121 853. Ce document décrit une machine à écrire à moteur dans laquelle un mécanisme, couplé audit moteur, permet à l'opérateur de provoquer à volonté l'écartement ou le rapprochement des rouleaux d'alimentation du papier par rapport à la platine, en manoeuvrant simplement un bouton particulier du clavier. Les rouleaux d'alimentation du papier sont portés par un berceau lui- même monté pivotant par rapport à la platine. Le berceau porte-rouleaux est couplé audit moteur par l'intermédiaire de moyens d&- couplage.The state of the prior art is also illustrated by document US-A-2 121 853. This document describes a motor typewriter in which a mechanism, coupled to said motor, allows the operator to induce at will the spacing or approximation of the paper feed rollers with respect to the platen, by simply operating a particular button on the keyboard. The paper feed rollers are carried by a cradle itself pivotally mounted relative to the plate. The roller carrier cradle is coupled to said motor by means of coupling means.

Ce mécanisme de la technique antérieure, s'il facilite bien la manoeuvre des rouleaux d'alimentation lorsque l'opérateur doit placer une feuille dans la machine, ne facilite pas pour autant ni n'automatise les diverses autres opérations nécessaires à la mise en place de la feuille. En plus de la manoeuvre des rouleaux d'alimentation, la mise en place de la feuille exige l'exécution, selon une séquence bien déterminée, de diverses autres opérations, telles que l'alignement du papier par rapport à la platine, le retrait de la tige presse-papier, la rotation de la platine pour avancer le papier jusqu'à la première ligne d'impression et la remise en place de la tige presse-papier.This mechanism of the prior art, although it facilitates the operation of the feed rollers when the operator has to place a sheet in the machine, does not facilitate or automate the various other operations necessary for the establishment of the sheet. In addition to the operation of the feed rollers, the positioning of the sheet requires the execution, in a well-determined sequence, of various other operations, such as aligning the paper with respect to the platen, removing the paperweight rod, the rotation of the platen to advance the paper to the first printing line and the replacement of the paperweight rod.

Exposé de l'inventionStatement of the invention

La présente invention a pour objet un dispositif grâce auquel les opérations nécessaires à la mise en place de la feuille de papier dans une machine à écrire ou imprimante, sont effectuées automatiquement selon la séquence appropriée, les seules tâches restant à accomplir manuellement par l'opérateur étant l'introduction de la feuille de papier jusqu'à ce que son bord avant vienne en butée sur un organe d'alignement et la manoeuvre d'un bouton de commande qui déclenche la séquence appropriée des opérations nécessaires à la mise en place de la feuille de papier.The subject of the present invention is a device by which the operations necessary for placing the sheet of paper in a typewriter or printer are carried out automatically in the appropriate sequence, the only tasks remaining to be performed manually by the operator being the introduction of the sheet of paper until its front edge abuts on an alignment member and the operation of a control button which triggers the appropriate sequence of operations necessary for the establishment of the sheet of paper.

Le dispositif selon la présente invention comporte, comme c'est le cas pour le dispositif décrit dans le document précité US-A-2 121 853, une platine cylindrique entraînée sélectivement en rotation par un premier moyen d'entraînement, ainsi que des rouleaux d'alimentation avant et arrière montés . sur un berceau lequel peut pivoter pour amener les rouleaux en contact avec la platine ou les éloigner de celle-ci. Le berceau est entraîné par un second moyen d'entraînement par l'intermédiaire de moyens de couplage. Un bouton de commande, ou moyen d'amorçage de cycle, permet à l'opérateur de déclencher un cycle de fonctionnement du second moyen d'entraînement, cycle au cours duquel le berceau porte-rouleaux passe d'une première à une seconde position et revient à sa première position.The device according to the present invention comprises, as is the case for the device described in the aforementioned document US-A-2 121 853, a cylindrical plate selectively driven in rotation by a first drive means, as well as rollers of 'front and rear power supply mounted. on a cradle which can pivot to bring the rollers in contact with the plate or move them away from it. The cradle is driven by a second drive means by means of coupling means. A control button, or cycle initiating means, allows the operator to initiate an operating cycle of the second drive means, a cycle during which the roller cradle moves from a first to a second position and returns to its first position.

Le dispositif selon la présente invention est caractérisé en ce que:

  • une tige presse-papier est associée à une came entraînée en rotation par le second moyen d'entraînement. La rotation de la came, au cours d'un cycle de fonctionnement du second moyen d'entraînement, provoque successivement le passage de la tige presse-papier d'une première position où elle est en contact avec la platine, à une seconde position où elle en est hors de contact et son retour à la première position,
  • le berceau porte-rouleaux est monté pivotant par rapport à la platine entre une première position dans laquelle les rouleaux d'alimentation avant sont en contact avec la platine alors que les rouleaux d'alimentation arrière en soht éloignés et une seconde position dans laquelle les positions respectives des rouleaux d'alimentation sont inversées,
  • un moyen d'alignement du bord avant de la feuille de papier est monté sur le berceau porte-rouleaux pour pouvoir se déplacer entre une première position, où il est en contact avec la platine, dans la zone comprise entre les rouleaux d'alimentation avant et arrière, et une seconde position, où il est dégagé de la platine, ledit moyen d'alignement étant rappelé élastiquement vers sa première position et étant associé auxdits moyens de couplage pour être amené par ces derniers vers sa deuxième position lorsque le berceau porte-rouleaux est amené dans sa deuxième position,
  • des moyens de commutation sont associés au moyen d'amorçage de cycle, à la came de commande de la tige presse-papier et au second moyen d'entraînement et, en réponse à l'arrivée de la came dans une position angulaire prédéterminée au cours du cycle de fonctionnement du second moyen d'entraînement, commandent l'arrêt de ce dernier, ladite position prédéterminée de la came correspondant à la deuxième position du berceau porte-rouleaux, de l'élément d'alignement et de la tige presse-papier,
  • des moyens logiques, en réponse à l'arrêt du second moyen d'entraînement, commandent le premier moyen d'entraînement afin que celui-ci entraîne la platine sur un arc prédéterminé et, lorsque ledit arc a été parcouru, commandent l'arrêt du premier moyen d'entraînement et la reprise du cycle du second moyen d'entraînement.
The device according to the present invention is characterized in that:
  • a paperweight rod is associated with a cam driven in rotation by the second drive means. The rotation of the cam, during an operating cycle of the second drive means, successively causes the paperweight rod to pass from a first position where it is in contact with the plate, to a second position where she is out of touch and returning to the first position,
  • the roller carrier cradle is pivotally mounted with respect to the plate between a first position in which the front feed rollers are in contact with the plate while the rear feed rollers in distant soht and a second position in which the positions respective feed rollers are reversed,
  • a means for aligning the front edge of the sheet of paper is mounted on the roll holder cradle so that it can move between a first position, where it is in contact with the plate, in the zone between the front and rear feed rollers, and a second position, where it is released from the plate, said alignment means being resiliently returned to its first position and being associated with said coupling means to be brought by the latter to its second position when the roller carrier cradle is brought into its second position,
  • switching means are associated with the cycle initiating means, the paperweight rod control cam and the second drive means and, in response to the arrival of the cam in a predetermined angular position during of the operating cycle of the second drive means, control the stopping of the latter, said predetermined position of the cam corresponding to the second position of the roller cradle, of the alignment element and of the paperweight rod ,
  • logic means, in response to the stop of the second drive means, control the first drive means so that the latter drives the plate over a predetermined arc and, when said arc has been traversed, control the stop of the first drive means and resumption of the cycle of the second drive means.

Brève description des figures des dessinsBrief description of the figures in the drawings

  • La Figure 1 est une vue prise de l'une des extrémités du dispositif de commande selon la présente invention dont les divers éléments sont dans une position ou un état permettant le relâchement du papier.Figure 1 is a view taken from one end of the control device according to the present invention, the various elements of which are in a position or state allowing the paper to be released.
  • La Figure 2 est une vue d'extrémité montrant la position du peigne flexible du dispositif de commande selon la présente invention lorsque les éléments composant ce dernier sont dans leur position ou leur état représenté sur la Figure 1.FIG. 2 is an end view showing the position of the flexible comb of the control device according to the present invention when the elements making up the latter are in their position or their state shown in FIG. 1.
  • La Figure 3 est une autre vue prise de la même extrémité que celle de la Figure 1 montrant les divers éléments composant le dispositif de commande dans une position ou un état permettant l'introduction initiale du papier.Figure 3 is another view taken from the same end as that of Figure 1 showing the various elements making up the control device in a position or state allowing the initial introduction of the paper.
  • La Figure 4 est une autre vue d'extrémité montrant la position du peigne flexible lorsque les divers éléments composant le dispositif de commande sont dans leur position ou état représenté sur la Figure 3.FIG. 4 is another end view showing the position of the flexible comb when the various elements making up the control device are in their position or state shown in FIG. 3.
  • La Figure 5 est toujours la même vue d'extrémité du dispositif de commande mais les éléments le composant sont dans une position ou un état permettant l'alimentation du papier autour de la platine à la suite d'une opération d'introduction initiale.Figure 5 is always the same end view of the control device but the elements making it up are in a position or state allowing the paper to be fed around the platen following an initial insertion operation.
  • La Figure 6 est encore une autre vue d'extrémité montrant la position du peigne flexible lorsque les divers éléments du dispositif de commande sont dans leur position ou état de la Figure 5.FIG. 6 is yet another end view showing the position of the flexible comb when the various elements of the control device are in their position or state in FIG. 5.
  • La Figure 7 est une vue en perspective du dispositif de commande des Figures 1, 3 et 5, qui montre d'une façon plus détaillée, tes divers éléments composant ce dernier.Figure 7 is a perspective view of the control device of Figures 1, 3 and 5, which shows in more detail, the various components of the latter.
  • La Figure 8 est une vue en perspective du dispositif des Figures 2, 4 et 6, qui montre d'une façon plus détaillée les divers éléments composant ce dernier.Figure 8 is a perspective view of the device of Figures 2, 4 and 6, which shows in more detail the various elements making up the latter.
Description d'un mode de réalisation de l'inventionDescription of an embodiment of the invention

On se reportera maintenant aux Figures 1, 2 et 7. Le dispositif de commande selon la présente invention est formé d'une unité modulaire 1 (Figure 1) et d'un peigne flexible 20 (Figure 2). L'unité 1 est montée à une extrémité du châssis 2 d'une imprimante au moyen d'un support 3 qui porte également un moteur d'entraînement 4 présentant un arbre de transmission de mouvement 5 à vis sans fin 6. Le support 3 porte aussi un axe 7 sur lequel un pignon 8 à came est monté à rotation. Le pignon 8 comporte des dents 9, sur sa périphérie, qui engrènent la vis sans fin 6. La face avant du pignon 8 comporte une came solidaire 10 dont la surface de guidage 11 est destinée à commander la tige presse-papier. La, face extérieure de la came 10 présente un téton 19 qui fait saillie au voisinage de sa périphérie extérieure. Ce téton 19 est mobile dans une boutonnière 12 ménagée dans un bras 13 du peigne flexible 20. L'extrémité inférieure du bras 13 est fixée à une tige 14 montée à rotation dans le châssis de l'imprimante 2. La tige 14 est un élément du peigne flexible 20 qui comporte des dents 15, 16, 17, etc ... (voir Figure 8).Referring now to Figures 1, 2 and 7. The control device according to the present invention is formed of a modular unit 1 (Figure 1) and a flexible comb 20 (Figure 2). Unit 1 is mounted at one end of the chassis 2 of a printer by means of a support 3 which also carries a drive motor 4 having a motion transmission shaft 5 with worm screw 6. The support 3 carries also an axis 7 on which a pinion 8 with cam is rotatably mounted. The pinion 8 has teeth 9, on its periphery, which mesh with the endless screw 6. The front face of the pinion 8 comprises an integral cam 10 whose guide surface 11 is intended to control the paperweight rod. The outer face of the cam 10 has a stud 19 which projects in the vicinity of its outer periphery. This stud 19 is movable in a buttonhole 12 formed in an arm 13 of the flexible comb 20. The lower end of the arm 13 is fixed to a rod 14 rotatably mounted in the chassis of the printer 2. The rod 14 is an element of the flexible comb 20 which has teeth 15, 16, 17, etc. (see Figure 8).

La tige 14 présente un rainure 18 dans laquelle est fixée une lame flexible dans laquelle sont découpées des languettes radiales formant les dents 15, 16, 17, etc ... du peigne flexible 20.The rod 14 has a groove 18 in which is fixed a flexible blade in which are cut radial tongues forming the teeth 15, 16, 17, etc. of the flexible comb 20.

On se reportera à nouveau aux Figures 1,2 et 7. Un axe 21 est monté dans le châssis d'imprimante 2. Un bras 22 est monté à pivot sur l'axe 21 et comporte un suiveur de came 23 dont l'extrémité suit la surface de guidage 11 du pignon à came 8 pour entraîner le bras 22 en rotation dans un premier et dans un deuxième sens. Le bras 22 et la tige 21 ne sont pas montés sur le support 3.Referring again to Figures 1,2 and 7. An axis 21 is mounted in the printer chassis 2. An arm 22 is pivotally mounted on the axis 21 and includes a cam follower 23 whose end follows the guide surface 11 of the cam pinion 8 for driving the arm 22 in rotation in a first and in a second direction. The arm 22 and the rod 21 are not mounted on the support 3.

Un axe 25, orienté vers l'extérieur, est monté dans la partie supérieure 24 du support 3 et porte le bras 26 d'un bouton basculant 31 et un ressort de restauration 27. Un support 28 du bouton basculant, comportant des surfaces de contact 29 et 30 est solidaire de la partie supérieure du bras 26. Le bouton basculant 31 est monté sur la partie supérieure du support 28. Lors de l'enfoncement par l'opérateur de l'une des extrémités 32 ou 33 du bouton basculant 31, le bras 26 est entraîné en rotation autour de l'axe 25. Le ressort 27 est sollicité par l'une des surfaces 29 ou 30 selon l'extrémité 32 ou 33 qui a été enfoncée par l'opérateur. Lorsque l'opérateur relâche sa pression sur l'une des extrémités 32 ou 33, le ressort 27 rappelle le bras 26 et le bouton basculant 31 dans leur position représentée.An axis 25, oriented towards the outside, is mounted in the upper part 24 of the support 3 and carries the arm 26 of a rocking button 31 and a restoration spring 27. A support 28 of the rocking button, comprising contact surfaces 29 and 30 is integral with the upper part of the arm 26. The tilting button 31 is mounted on the upper part of the support 28. When the operator pushes one of the ends 32 or 33 of the tilting button 31, the arm 26 is rotated about the axis 25. The spring 27 is biased by one of the surfaces 29 or 30 along the end 32 or 33 which has been pressed in by the operator. When the operator releases his pressure on one of the ends 32 or 33, the spring 27 recalls the arm 26 and the rocking button 31 in their position shown.

Un axe 34 orienté vers l'extérieur est également monté sur le support 3 et traverse une boutonnière incurvée 35 ménagée dans le bras 26. Cette boutonnière 35 est située en-dessous de l'axe 25 et ses extrémités 36 et 36 limitent le basculement ou la rotation du bouton de commande 31 et du bras 26. Une jambe de shunt 38 et une jambe porte-aimant 39 sont solidaires du bras 26. Un aimant permanent 41 est fixé à une extrémité extérieure 40 de la jambe 39.An axis 34 oriented towards the outside is also mounted on the support 3 and passes through a curved buttonhole 35 formed in the arm 26. This buttonhole 35 is located below the axis 25 and its ends 36 and 36 limit tilting or the rotation of the control button 31 and of the arm 26. A shunt leg 38 and a magnet-carrying leg 39 are integral with the arm 26. A permanent magnet 41 is fixed to an outer end 40 of the leg 39.

Le support 3 porte également un ensemble de commutation 42 sur lequel sont montés des commutateurs à lames 43 et 44. Les commutateurs à lame 43 et 44 sont connectés aux conducteurs d'entrée/sortie 45, 46 et 47. Comme on le verra par la suite, des signaux sont appliqués aux conducteurs 45, 46 et 47 pour mettre le moteur 4 en route et le couper et pour mettre en route et couper un moteur d'entraînement de platine non représenté. Ces deux moteurs sont actionnés à des moments différents.The support 3 also carries a switching assembly 42 on which are mounted blade switches 43 and 44. The blade switches 43 and 44 are connected to the input / output conductors 45, 46 and 47. As will be seen by the below, signals are applied to conductors 45, 46 and 47 to start and stop the motor 4 and to start and stop a drive motor not shown. These two motors are activated at different times.

Un aimant incurvé 80 est noyé dans la face arrière du pignon 8 et peut être positionné, par la rotation dudit pignon 8 relativement au commutateur à lames 43 pour couper le moteur 4 et mettre en route le moteur d'entraînement de platine.A curved magnet 80 is embedded in the rear face of the pinion 8 and can be positioned, by the rotation of said pinion 8 relative to the reed switch 43 to cut the motor 4 and start the platen drive motor.

On se reportera maintenant aux Figures 2 et 8. On voit que le peigne 20 est conçu pour être installé dans un dispositif 50. Le dispositif 50 est composé d'un berceau de platine 51 et des chapes telle que 52 et 53 qui sont identiques; on ne décrire donc que la chape 52. La chape 52 est solidaire du berceau 51 et comporte deux jambes 54 et 55 orientées vers le bas qui forment entre elles un passage 56 prévu pour recevoir un axe 57 dont les extrémités sont montées dans le châssis d'imprimante 2. Le dispositif 50 tourne autour de l'axe 57 sous l'action des dents 15 du peigne 20 venant en contact avec les surfaces de contact 58 et 59 des jambes 54 et 55.We will now refer to Figures 2 and 8. We see that the comb 20 is designed to be installed in a device 50. The device 50 is composed of a platinum cradle 51 and yokes such as 52 and 53 which are identical; we therefore only describe the yoke 52. The yoke 52 is integral with the cradle 51 and has two legs 54 and 55 oriented downward which form between them a passage 56 provided for receiving an axis 57 whose ends are mounted in the chassis d printer 2. The device 50 rotates around the axis 57 under the action of the teeth 15 of the comb 20 coming into contact with the contact surfaces 58 and 59 of the legs 54 and 55.

Le berceau 51 comporte trois fenêtres. Le rouleau d'alimentation avant 60 est disposé dans l'une d'elles et dans une autre est disposé le rouleau d'alimentation arrière 61. Une unité d'alignement du papier 62 peut être disposée dans la troisième fenêtre du berceau 51. Un élément 63 orienté vers le bas est fixé au berceau 51 et porte un axe 64 sur lequel un renvoi 65 est monté à rotation. L'élément d'alignement du papier 62 est solidaire du renvoi 65 qui comporte une jambe 66 orientée vers le bas laquelle présente une surface de contact 67 qui est sollicitée par la dent 16 pour provoquer le positionnement de l'élément d'alignement du papier 52 par rapport à la platine d'imprimante 68.The cradle 51 has three windows. The front feed roller 60 is arranged in one of them and in another is arranged the rear feed roller 61. A paper alignment unit 62 can be arranged in the third window of the cradle 51. A element 63 oriented downwards is fixed to the cradle 51 and carries an axis 64 on which a reference 65 is rotatably mounted. The paper alignment element 62 is integral with the reference 65 which has a leg 66 oriented downwards which has a contact surface 67 which is biased by the tooth 16 to cause the positioning of the paper alignment element 52 with respect to the printer platen 68.

Pour la description du fonctionnement du dispositif, on se reportera maintenant aux Figures 3, 4 et 8. Pendant les opérations d'impression réelles, le rouleau d'alimentation avant 60 est disposé de façon à provoquer l'application du papier 71 contre la platine 68. Pour que le rouleau 60 soit dans cette position; il faut que le peigne 20 ait été entraîné en rotation dans le sens anti-horaire et la dent 15 doit être en contact avec la surface 58. Dans cette position de la dent 15, le dispositif 50 est maintenu dans la position de la Figure 4. A cet instant, l'élément d'alignement 62 est en contact avec le papier 71 et l'applique contre la platine 68. Après que la feuille 71 ait été avancée à la première ligne d'écriture, une autre feuille 72 peut être introduite dans l'imprimante par l'arrière de la platine 68.For the description of the operation of the device, reference will now be made to Figures 3, 4 and 8. During the actual printing operations, the front feed roller 60 is arranged so as to cause the application of the paper 71 against the platen 68. So that the roller 60 is in this position; the comb 20 must have been rotated counterclockwise and the tooth 15 must be in contact with the surface 58. In this position of the tooth 15, the device 50 is kept in the position of FIG. 4 At this instant, the alignment element 62 is in contact with the paper 71 and presses it against the plate 68. After the sheet 71 has been advanced to the first writing line, another sheet 72 can be inserted into the printer from the back of the plate 68.

Il y a trois arcs de rotation possibles du peigne 20 dans chaque sens de rotation (avant ou anti-horaire, arrière ou horaire). Le peigne 20 étant dans sa position de la Figure 4, le premier arc de rotation dans le· sens horaire permet au rouleau d'alimentation avant 60 de s'éloigner de la platine 68. C'est-à-dire que la pression exercée par le rouleau 60 est relâchée. Ceci est dû au fait que la dent 15 est dégagée de la surface 58.There are three possible arcs of rotation of the comb 20 in each direction of rotation (forward or counterclockwise, backward or clockwise). With the comb 20 in its position in FIG. 4, the first arc of rotation clockwise allows the front feed roller 60 to move away from the plate 68. That is to say that the pressure exerted by the roller 60 is released. This is due to the fact that the tooth 15 is released from the surface 58.

Le deuxième arc de rotation dans le sens horaire permet à la dent 15 d'entrer en contact avec la surface 59 et provoque la rotation du dispositif 50 dans le sens anti-horaire. Dans ce cas, le rouleau d'alimentation, arrière 61 est entraîné vers la _platine 58 pour provoquer l'application du papier 71 contre ladite platine 68. Le troisième arc de rotation dans le sens horaire du peigne 20 permet à la dent 16 de venir en contact avec la surface 67 de la jambe 66 du renvoi 65 pour séparer l'élément d'alignement 62 'de la platine 68.The second clockwise arc allows the tooth 15 to come into contact with the surface 59 and causes the device 50 to rotate counterclockwise. In this case, the rear feed roller 61 is driven towards the platen 58 to cause the application of the paper 71 against said platen 68. The third arc of rotation in the clockwise direction of the comb 20 allows the tooth 16 to come in contact with the surface 67 of the leg 66 of the reference 65 to separate the alignment element 62 'from the plate 68.

Le premier arc de rotation dans le sens anti-horaire du peigne 20 après son troisième arc de rotation dans le sens horaire, provoque la séparation de la dent 16 de la surface 67. Lorsque ceci se produit, l'élément d'alignement 62 est relâché ou autorisé à se déplacer vers la platine 68 sous la sollicitation d'un ressort non représenté. Le deuxième arc de rotation dans le sens anti-horaire du peigne 20 provoque la séparation de la dent 15 de la surface 59, ce qui permet au rouleau 61 d'être éloigné de la platine 58. Le troisième arc de rotation dans le sens anti-horaire du peigne 20 amène la dent 15 en contact avec la surface 58 pour appliquer le rouleau d'alimentation avant 60 contre la platine 68 et ainsi provoquer le contact du papier 71 et de la platine.The first arc of counterclockwise rotation of the comb 20 after its third arc of clockwise rotation causes the tooth 16 to separate from the surface 67. When this occurs, the alignment element 62 is released or authorized to move towards the plate 68 under the stress of a spring not shown. The second counter-clockwise rotation arc of the comb 20 causes the tooth 15 to separate from the surface 59, which allows the roller 61 to be moved away from the plate 58. The third anti-clockwise rotation arc -comb of the comb 20 brings the tooth 15 into contact with the surface 58 to apply the front feed roller 60 against the plate 68 and thus cause the contact of the paper 71 and the plate.

Avant l'exécution du chargement initial d'une feuille de papier 71 dans une imprimante par l'arrière de la platine 68, le rouleau d'alimentation arrière 61 est éloigné de la platine 68 et l'élément d'alignement 62 est en contact avec celle-ci. Ceci permet le passage du bord avant 73 de la feuille 71 entre le rouleau 61 et la platine 68. A l'introduction du papier 71 entre le rouleau 61 et la platine 68, le bord avant 73 est amené en butée contre l'élément '62 pour aligner la feuille 71. Après l'alignement du bord avant 73 contre l'élément d'alignement 62, celui-ci doit être éloigné de la platine 68 pour laisser un passage continu pour la feuille 71 autour de la platine 68. De plus, le rouleau d'alimentation arrière 61 doit être appliqué contre la platine 68 pour provoquer le contact de la feuille 71 et de ladite platine 68. Puis, la platine 68 est entraînée en rotation jusqu'à ce que le bord avant 73 ait dépassé le rouleau d'alimentation avant 60 et que la feuille 71 soit disposée à la première ligne d'impression. Après que le papier 71 ait été ainsi avancé, l'élément d'alignement 62 est appliqué contre la platine 68 pour maintenir la feuille 71 en position tandis que le rouleau d'alimentation arrière 61 est éloigné de la platine 68 et que le rouleau avant 60 est appliqué contre celle-ci. L'application du rouleau avant 60 contre la platine 68 provoque le contact de la feuille 71 et de la platine et permet l'alimentation de la feuille pendant l'impression.Before the initial loading of a sheet of paper 71 into a printer from the rear of the stage 68 is carried out, the rear feed roller 61 is removed from the stage 68 and the alignment element 62 is in contact with it. This allows the front edge 73 of the sheet 71 to pass between the roller 61 and the plate 68. When introducing the paper 71 between the roller 61 and the plate 68, the front edge 73 is brought into abutment against the element ' 62 to align the sheet 71. After aligning the edge front 73 against the alignment element 62, this must be distant from the plate 68 to allow a continuous passage for the sheet 71 around the plate 68. In addition, the rear feed roller 61 must be applied against the plate 68 to cause the sheet 71 and said plate 68 to come into contact. Then, the plate 68 is rotated until the front edge 73 has passed the feed roller before 60 and the sheet 71 is arranged at the first printing line. After the paper 71 has thus been advanced, the alignment member 62 is pressed against the platen 68 to hold the sheet 71 in position while the rear feed roller 61 is away from the platen 68 and the front roller 60 is applied against it. The application of the front roller 60 against the platen 68 causes the sheet 71 to contact the platen and allows the sheet to be fed during printing.

En gardant à l'esprit ce que l'on a décrit ci-dessus, on pourra consulter les tableaux suivants qui illustrent plus clairement le fonctionnement du dispositif de la présente invention. Le premier tableau A concerne une opération de chargement du papier qui commence par l'introduction du papier et se termine par le positionnement dudit papier à la première ligne d'impression. Le deuxième tableau B concerne une opération de dégagement du papier de la platine pour permettre l'exécution d'un réglage par l'opérateur ou le retrait du papier hors de l'imprimante.

Figure imgb0001
Figure imgb0002
Figure imgb0003
Figure imgb0004
Figure imgb0005
Figure imgb0006
Keeping in mind what has been described above, we can consult the following tables which illustrate more clearly the operation of the device of the present invention. The first table A relates to a paper loading operation which begins with the introduction of the paper and ends with the positioning of said paper at the first printing line. The second table B relates to an operation for removing the paper from the platen to allow the execution of an adjustment by the operator or the removal of the paper from the printer.
Figure imgb0001
Figure imgb0002
Figure imgb0003
Figure imgb0004
Figure imgb0005
Figure imgb0006

En consultant le tableau A, on supposera que les éléments composant le dispositif de la présente invention sont dans leur position ou état des Figures 3 et 4 lorsqu'une opération de chargement initial doit être effectuée. Chaque séquence de cas est numérotée par ordre au moyen de chiffres entre parenthèses. L'opération de chargement initial commence par l'introduction d'une feuille de papier 71 dans l'imprimante par l'arrière de la platine 68. Avant l'introduction de la feuille 71 dans l'imprimante, l'élément d'alignement du papier 62 doit être en contact avec la platine 68 et le rouleau d'alimentation arrière 61 doit être dégagé de celle-ci. A l'introduction de la feuille 71, le bord avent 73 de celle-ci est donc aligné contre l'élément d'alignement 62. Puis, l'éxtrémité 33 du bouton basculant 31 est momentanément enfoncée, ce qui provoque la fermeture du commutateur à lames 44 par l'aimant 41 et la mise en route du moteur 4. La rotation du moteur 4 entraîne le peigne 20 dans une rotation dans le sens horaire pour appliquer le rouleau arrière 61 contre la platine 68 afin de provoquer le serrage du papier 71 contre la platine 68. De plus, l'élément d'alignement 62 sera dégagé de la platine 68. La rotation du pignon 8 se poursuit jusqu'à ce que l'aimant 80 noyé dans le côté arrière du pignon 8 arrive dans une position provoquant l'ouverture du commutateur à lames 43, ce qui coupe le moteur 4 et entraîne l'application de signaux à des lignes 45 à 47 vers un moteur d'entraînement en rotation de la platine 68. La platine est entaînée en rotation sur un certain arc par un moteur pas à pas, un servomoteur ou autre moteur similaire, jusqu'à ce que le bord avant 73 ait suffisamment avancé pour permettre l'impression de la première ligne sur la feuille 71. Le moteur d'entraînement de la platine est alors coupé et un signal ou des signaux sont à nouveau appliqués par les lignes 45 à 47 pour redémarrer le moteur 4. A la première mise en marche du moteur d'entrainement 4 la tige presse-papier 74 fixée au bras 22 a été entraînée en rotation dans le sens anti-horaire autour de l'axe 21 pour la dégager de la platine 68. Lorsque le moteur 4 est à nouveau mis en route, lors de l'arrêt de la rotation de la platine 68, la tige presse-papier 74 doit être engagée contre la platine 68 pour appliquer la partie avant 81 de la feuille 71 sur la platine 68. La position et l'état des éléments composant le dispositif de la présente invention au moment où la platine 68 est entraînée en rotation pour avancer la partie avant 81 à une première ligne d'écriture, sont représentés aux figures 5 et 6. Après l'arrêt du moteur 4, les éléments composant le dispositif de la présente invention doivent être dans les positions et états représentés aux figures 3 et 4 pour l'alimentation par le rouieau avant de la feuille 71 lors de la rotation de la platine 68 pour l'impression. Le tableau B décrit én détait une opération de dégagement du papier pour laquelle les rouleaux d'alimentation avant 60 et arrière 61 doivant être dégagés de la platine 68. Les positions et états des éléments composant le dispositif de la présente invention doivent être ceux des figures 1 et 2. L'ordre des opérations est noté entre parenthèses dans le tableau. Il est à noter que lorsque l'extrémité 32 du bouton 31 est enfoncée, le moteur 4 est mis en route pendant un temps prédéterminé, puis il est coupé. Ceci est dû l'application d'un signal ou de signaux sur les lignes 45 à 47. Cette période de fonctionnement est déterminée par une logique non représentée. De même une logique non représentée commande la mise en route du moteur d'entraînement de la platine sur un arc donné, puis, en séquence, la remise en route du moteur 4.By consulting table A, it will be assumed that the elements making up the device of the present invention are in their position or state in FIGS. 3 and 4 when an initial loading operation has to be carried out. Each case sequence is numbered in order using numbers in parentheses. The initial loading operation begins with the introduction of a sheet of paper 71 into the printer from the rear of the platen 68. Before the introduction of the sheet 71 into the printer, the alignment element paper 62 must be in contact with the plate 68 and the rear feed roller 61 must be released from the latter. When the sheet 71 is introduced, the advent edge 73 of the latter is therefore aligned against the alignment element 62. Then, the end 33 of the rocking button 31 is momentarily depressed, which causes the switch to close. with blades 44 by the magnet 41 and the starting of the motor 4. The rotation of the motor 4 drives the comb 20 in a clockwise rotation to apply the rear roller 61 against the plate 68 in order to cause the paper to be tightened 71 against the plate 68. In addition, the alignment element 62 will be released from the plate 68. The rotation of the pinion 8 continues until the magnet 80 embedded in the rear side of the pinion 8 arrives in a position causing the opening of the reed switch 43, which cuts the motor 4 and causes the application of signals to lines 45 to 47 towards a motor for driving in rotation of the plate 68. The plate is driven in rotation on a certain arc by a stepping motor, a servomotor or other similar motor e, until the front edge 73 has advanced sufficiently to allow the printing of the first line on the sheet 71. The drive motor of the stage is then stopped and a signal or signals are again applied by lines 45 to 47 to restart the motor 4. When the drive motor 4 is started for the first time, the paperweight rod 74 fixed to the arm 22 has been rotated counterclockwise around the axis 21 to release it from the plate 68. When the motor 4 is started again, when the rotation of the plate 68 stops, the paperweight rod 74 must be engaged against the plate 68 to apply the front part 81 of the sheet 71 on the plate 68. The position and the state of the elements composing the device of the present invention at the moment when the plate 68 is rotated to advance the front part 81 to a first writing line, are shown in Figures 5 and 6. After stopping the engine 4, the elements s making up the device of the present invention must be in the positions and states shown in FIGS. 3 and 4 for feeding by the front roller of the sheet 71 during the rotation of the plate 68 for printing. Table B describes en detait a paper release operation for which the front feed rollers 60 and rear 61 must be released from the plate 68. The positions and states of the elements making up the device of the present invention should be those of the figures 1 and 2. The order of operations is noted in parentheses in the table. It should be noted that when the end 32 of the button 31 is pressed, the motor 4 is started for a predetermined time, then it is switched off. This is due to the application of a signal or signals on lines 45 to 47. This operating period is determined by logic not shown. Similarly, a logic which is not shown controls the starting of the drive motor of the plate on a given arc, then, in sequence, the restarting of the motor 4.

Bien que l'on ait décrit dans ce qui précède et représenté sur les dessins les caractéristiques essentielles de l'invention appliquées à un mode de réalisation préféré de celle-ci, il est évident que l'homme de l'art peut y apporter toutes modifications de forme ou de détail qu'il juge utiles sans pour autant sortir du cadre de ladite invention.Although the essential characteristics of the invention applied to a preferred embodiment of the invention have been described in the foregoing and represented in the drawings, it is obvious that a person skilled in the art can provide all of them. modifications of form or detail which he deems useful without departing from the scope of said invention.

Claims (5)

1. A control device for feeding a paper sheet (71) into a printer, of the type including a cylindrical platen (68) selectively driven into rotation by a first driving means, front and rear feed rollers (60, 61) coupled to a position control means (50) for selectively bringing them into contact with the platen (68) or moving them away from the latter, said rollers being supported by a roller support channel (51) pivotally mounted with respect to the platen (68), a second driving means (4) associated with said position control means (50) to move the latter, an operator controllable cycle initiating means (31) for initiating an operation cycle of the second driving means (4), and coupling means (8, 19, 13, 14, 20) for coupling the channel (51) to the second driving means (4), said coupling means ensuring movement of said channel from a first position to a second position and back to its first position during an operation cycle of the second driving means (4), said cycle device being characterized in that:
a paper bail (74) is movably mounted between a first position where it is in contact with the platen (68) and a second position where it is released therefrom,
the roller support channel (51) is pivotally mounted with respect to the platen (68) between a first position where the front feed rollers (60) are in contact with the platen (68), whereas the rear feed rollers (61) are moved away therefrom, and a second position where the respective positions of the feed rollers are inverted,
an aligning means (62) for aligning the leading edge (73) of the paper sheet (71) is mounted on said channel (51) so as to move between a first position where it is in contact with the platen (68), in the area between the front and back feed rollers (60, 61), and a second position where it is released from the platen (68), said aligning means (62) being spring-biased to its first position and being associated with said coupling means (8, 19, 13, 14, 20) to be moved by the latter to its second position when said channel (51) is moved to its second position,
the paper bail (74) is associated with a cam (10) rotatably driven by said second driving means (4), said cam (10) causing the paper bail (74) to be moved successively from its first to its second position and back to its first position during an operation cycle of the second driving means (4),
switching means (43, 44, 80) are associated, with said cycle initiating means, with the cam (10) and the second driving means (4) and said switching means being responsive to the positioning of the cam (10) in a predetermined angular position during the operation cycle of the second driving means (4), to stop the latter, said predetermined position of the cam (10) corresponding to the second position of the channel (51 ),of the aligning means (62) and of the paper bail (74),
logic means responsive to said stopping of the second driving means (4) are provided to control the first driving means so that the latter drives the platen (68) over a predetermined arc, and when this arc has been traversed, controls stopping of the first driving means and resuming of the second driving means.
2. A device according to claim 1, characterized in that said coupling means (8, 19, 13, 14, 20) for coupling the roller support channel (51) to the second driving means (4) include a gear (8) rotatably driven by the second driving means (4), a pin (19) fixed to the periphery of the gear (8), an arm (13) with an aperture (12) in which the pin (19) moves an end of the arm (13) being fixed to a rod (14) rotatably mounted in the printer frame (2) and an element (20) coupled to the rod (14) for transmitting the motion of the latter to the roller support channel (51).
3. A device according to claim 2, characterized in that said cam (10) is fixed to said gear (8).
4. A device according to claim 3, characterized in that the paper bail (74) is fixed to an arm (22) pivotally mounted with respect to the printer frame (2), said arm (22) having a cam follower (23) cooperating with the cam (10).
5. A device according to claim 4, characterized in that said switching means (43, 44, 80) include at least one reed switch (43) normally closed, and a magnet (80) fixed to the gear (8), said magnet (80) causing said normally closed switch (43) to open and the cycle of the second driving means (4) to stop when the cam (10) reaches at said predetermined angular position.
EP79104887A 1978-12-26 1979-12-04 Device for regulating the supply of paper to a printing-platen Expired EP0013720B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/973,360 US4211499A (en) 1978-12-26 1978-12-26 Paper feeding control apparatus
US973360 1978-12-26

Publications (2)

Publication Number Publication Date
EP0013720A1 EP0013720A1 (en) 1980-08-06
EP0013720B1 true EP0013720B1 (en) 1982-05-05

Family

ID=25520814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104887A Expired EP0013720B1 (en) 1978-12-26 1979-12-04 Device for regulating the supply of paper to a printing-platen

Country Status (6)

Country Link
US (1) US4211499A (en)
EP (1) EP0013720B1 (en)
JP (1) JPS5587587A (en)
CA (1) CA1128450A (en)
DE (1) DE2962744D1 (en)
IT (1) IT1162597B (en)

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Publication number Priority date Publication date Assignee Title
WO1982001514A1 (en) * 1980-11-04 1982-05-13 Wang Laboratories Paper insertion and feeding controlled by upper paper bail
DE3209085C2 (en) * 1981-03-17 1986-03-27 Canon K.K., Tokio/Tokyo Paper feed mechanism
JPS5816874A (en) * 1981-07-24 1983-01-31 Ricoh Co Ltd Semi-automatic paper insertion device
IT1155264B (en) * 1982-02-03 1987-01-28 Olivetti & Co Spa DOCUMENT INTRODUCER
JPS5939574A (en) * 1982-08-30 1984-03-03 インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション Switchgear for bail
US4714364A (en) * 1984-08-10 1987-12-22 Ricoh Company, Ltd. Automatically returned paper ball assembly of a printer
JPS61132361A (en) * 1984-11-30 1986-06-19 Tokyo Juki Ind Co Ltd Printing paper feeding mechanism for printer
JPS6397909A (en) * 1986-10-08 1988-04-28 ジーティーイー・コントロール・デバイセズ・オブ・プエルトリコ・インコーポレイテッド Fiber optic splice assembly
US4988224A (en) * 1986-10-09 1991-01-29 Genicom Corporation Universal ribbon cartridge for high-speed printers
CH689277A5 (en) * 1993-09-10 1999-01-29 Ocd Sa Sheet feeding device.
KR100472482B1 (en) * 2002-11-27 2005-03-09 삼성전자주식회사 Ejecting mechanism of printing media and inkjet printer having the same
GB2422764A (en) 2005-02-07 2006-08-09 Advanced Engineering Tech Ltd Grass treatment apparatus having removable cassette
US10501275B2 (en) 2016-04-15 2019-12-10 Hewlett-Packard Development Company, L.P. Bail arm to rotate and oscillate

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US1145017A (en) * 1915-07-06 Royal Typewriter Co Inc Writing-machine.
US1874256A (en) * 1930-05-01 1932-08-30 Underwood Elliott Fisher Co Typewriting machine
US1969773A (en) * 1932-01-15 1934-08-14 L C Smith & Corona Typewriters Typewriting machine
US2121853A (en) * 1936-12-04 1938-06-28 Burroughs Adding Machine Co Typewriter
US2881893A (en) * 1954-10-28 1959-04-14 Standard Register Co Strip feeding device
US2864484A (en) * 1955-03-01 1958-12-16 Standard Register Co Strip feeding mechanism
US3223221A (en) * 1963-03-13 1965-12-14 Royal Typewriter Co Inc Paper handling mechanism
JPS5026611B2 (en) * 1972-09-12 1975-09-02
JPS6021869B2 (en) * 1976-04-12 1985-05-29 エプソン株式会社 paper feed mechanism
JPS5492408A (en) * 1977-12-28 1979-07-21 Ricoh Kk Paper supplying apparatus of letter printing apparatus

Also Published As

Publication number Publication date
IT1162597B (en) 1987-04-01
EP0013720A1 (en) 1980-08-06
US4211499A (en) 1980-07-08
DE2962744D1 (en) 1982-06-24
JPS5753193B2 (en) 1982-11-11
IT7927809A0 (en) 1979-12-04
JPS5587587A (en) 1980-07-02
CA1128450A (en) 1982-07-27

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