EP1084853A1 - Thermal printer - Google Patents

Thermal printer Download PDF

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Publication number
EP1084853A1
EP1084853A1 EP00402534A EP00402534A EP1084853A1 EP 1084853 A1 EP1084853 A1 EP 1084853A1 EP 00402534 A EP00402534 A EP 00402534A EP 00402534 A EP00402534 A EP 00402534A EP 1084853 A1 EP1084853 A1 EP 1084853A1
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EP
European Patent Office
Prior art keywords
roller
print head
head
frame
stop
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.)
Withdrawn
Application number
EP00402534A
Other languages
German (de)
French (fr)
Inventor
Patrick Favre
Laurent Brac De La Perriere
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.)
Safran Electronics and Defense SAS
Original Assignee
Sagem 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 Sagem SA filed Critical Sagem SA
Publication of EP1084853A1 publication Critical patent/EP1084853A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B41J15/042—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles for loading rolled-up continuous copy material into printers, e.g. for replacing a used-up paper roll; Point-of-sale printers with openable casings allowing access to the rolled-up continuous copy material
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/04—Roller platens

Definitions

  • the invention relates to a thermal printer.
  • the domain of the invention is that of thermal printers, and more particularly that of thermal printers included in payment terminals for bank card for example. So it's just printers with a small writing width and a print head which is fixed.
  • the object of the invention is to ensure uniform support of the paper on which one you want to print against the print head, and this with the the simplest and least expensive device to make.
  • bank payment terminals portable have a thermal head having a width of about 58 mm, and comprising approximately 384 printing dots. This represents a definition of 6.6 points per millimeter.
  • This print head is attached to the printer frame by an elastic device which gives the head printer mobility in one direction.
  • Thermal paper is held against the print head by a drive roller.
  • the drive roller is integral with the cover of the loading magazine in paper. So when you open this cover to reload the printer for paper, the roller moves away from the print head, which gives you complete freedom the user to position the paper. Then when the cover is closed, the drive roller presses the paper against the print head. To ensure correct positioning of the roller relative to the head printing, and therefore to ensure proper maintenance of the paper, the roller comes to rest on a stop fixed on the printer frame.
  • Figure 1 shows a print head 101 fixed to a frame 102 by an elastic link 103 which gives the head 101 mobility according to a horizontal direction.
  • a sheet of paper 104 is held against the head 103 by a roller 105.
  • the roller 105 is in abutment on a stop 106 fixed to the frame 102.
  • the roller 105 is movable around a hinge 107.
  • the problem with this device is that when it is made, it accumulates many quotes and tolerances that must be maintained to ensure correct positioning of roller 105.
  • the dimensions relate to the frame, to the stop 106, on the hinge 107 and on the print head 101. Indeed if the link 103 makes it possible to recover a slight defect in a horizontal positioning of the roller, it does not allow a defect in vertical positioning. So stop 106 must be fixed very precisely with respect to the frame 102. Similarly, the play of the hinge 107 is zero. It is therefore a difficult solution to implement.
  • the invention solves these problems on the one hand by securing the stop and the print head, on the other hand by making the print head mobile according to two directions. Therefore the print head allows to catch errors positioning of the drive roller due to incorrect machining or quotations held but at the limit, in a horizontal direction and a vertical direction.
  • the invention therefore relates to a thermal printer comprising a frame, a print head, a paper feed roller, and a timing roller stopper characterized in that the stopper wedging the drive roller is rigidly fixed to the print head.
  • FIG. 2 shows a frame 201 of a printing device 200.
  • the 200 printing device can be a printer or any other device requiring information to be printed, such as a bank payment.
  • Figure 2 also shows a print head 202.
  • This print head is substantially equal in width to that of paper on which it should print, and it has heating elements which let you burn this paper. In our example the print head has a width of 58mm, and has 384 independent heating elements. These elements constitute a line and can be activated independently. This is like saying that a line of the printed image has 384 pixels.
  • the print head 202 is fixed to a radiator 203.
  • the radiator 203 is a device made of a material which makes it possible to dissipate the excess heat produced by the head 202.
  • a radiator is a flat device.
  • the radiator 203 comprises a protrusion 204.
  • This protrusion 204 serves as a stop for an axis 205 of a 206 paper feed roller, it is also useful for dissipation of excess heat and will allow the heating elements making up the head 202 to cool.
  • the head 202 is fixed to the radiator 203 so that when the axis 205 of the roll 206 rests on the protrusion 204, the line formed by the heating elements of the head 202 and the director of the axis 205 are parallel and there is tangency between the head 202 and the surface of the roller 206. So when you place a sheet of paper 207 between the head 202 and the roller 206, the sheet 207 can be driven by the roller 206. In addition as there is tangency between the roller 206 and the head 202 the sheet 207 can be printed since it is pressed against the print head 202 by the roller 206.
  • the axis 205 is fixed to a branch 208 by a pivot link 209.
  • the axis 205 and the roller 206 can therefore have a rotational movement around of the pivot link 209.
  • the branch 208 is fixed to the frame 201 by a hinge 210.
  • the connection between the axis 205 and the branch 208 can be slightly floating.
  • the branch 208 is in the open position, when the roller 206 is as far as possible from the head 202.
  • the branch 202 is in the closed position when there is tangency between the roller 206 and the head 202.
  • FIG. 4 shows that, as a general rule, branch 208 is a cover 401.
  • the roller 206 and the cover 401 are therefore integral in a movement of rotation about the axis of the hinge 210.
  • a locking device not shown. This locking device limits the travel of the hood around the hinge 210.
  • the radiator 203 is fixed to the frame 201 by a spring 211 which can be compressed in a horizontal direction, and by a spring 212 which can be compressed in a vertical direction.
  • the horizontal is defined when the device including the device according to the invention is placed flat on a table, in the normal position provided for its operation by its manufacturer. In practice it it suffices that the compression directions of the springs 211 and 212 are not not parallel, and both oppose the placement of the roller 206. Proper positioning of the roller 206 relative to the head 202 is therefore ensured by good completion of the stop 204.
  • Figure 3 illustrates that Figure 2 was a side view.
  • the figure 3 shows that there is a protrusion on which the axis 205 abuts on either side of the head 202. There is therefore a protrusion 204 and a outgrowth 204b.
  • the axis 205 is supported both on the stop 204 and on the stop 204b.
  • FIG. 3 also shows that the axis 205 is integral, for example, with a gear 301. It is thanks to this gear 301 that the roller 206 can be rotated, and therefore drag the paper to scroll in front of the head 202.
  • the axle 205, roller 206 and gear 301 assembly is movable in rotation about an axis 302 parallel to the head 202. This allows to press the roller 206 against the head 202, or to free access to a compartment in which to place the paper reserve of the printer.
  • gear 301 For driving the rotating roller 206, or the gear 301 comes to mesh on a gear fixed on the frame 201.
  • the gear fixed on the frame 201 is rotated by a motor included in the device.
  • Either gear 301 is meshed on a device which is included in the cover 401.
  • This latter solution dispenses with having to provide means so that the gear 301 meshes properly on a gear which would be fixed to the frame 201.
  • the device for rotating the roller 206 is completely integral, in its movement around axis 302, with axis 205 and the roller 206. This eliminates the problems associated with relative positioning two gears which must mesh correctly.

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  • Common Mechanisms (AREA)
  • Electronic Switches (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

Thermal printer comprises a frame (201), a print head (202), a paper guide roller (206) and a stop (204) to hold the roller in position. The stop is rigidly fixed to the print head by an extension (203) from the print head. Print head and extension are mounted on the support frame using sprung connections (211, 212).

Description

L'invention a pour objet une imprimante thermique. Le domaine de l'invention est celui des imprimantes thermiques, et plus particulièrement celui des imprimantes thermiques comprises dans les terminaux de paiement pour carte bancaire par exemple. Il s'agit donc que des imprimantes thermiques ayant une faible largeur d'écriture, et une tête d'impression qui est fixe. Le but de l'invention est d'assurer un appui homogène du papier sur lequel on souhaite imprimer contre la tête d'impression, et ce avec le dispositif le plus simple et le moins onéreux à réaliser.The invention relates to a thermal printer. The domain of the invention is that of thermal printers, and more particularly that of thermal printers included in payment terminals for bank card for example. So it's just printers with a small writing width and a print head which is fixed. The object of the invention is to ensure uniform support of the paper on which one you want to print against the print head, and this with the the simplest and least expensive device to make.

Dans l'état de la technique, les terminaux de paiement bancaire portable sont dotés d'une tête thermique ayant une largeur de l'ordre de 58 mm, et comportant environ 384 points d'impression. Cela représente une définition de 6,6 points par millimètre. Cette tête d'impression est fixée au bâti de l'imprimante par un dispositif élastique qui confère à la tête d'imprimante une mobilité suivant une direction. Le papier thermique est maintenu contre la tête d'impression par un rouleau d'entraínement. Le rouleau d'entraínement est solidaire du capot du magasin de chargement en papier. Ainsi lorsqu'on ouvre ce capot pour recharger l'imprimante pour papier, le rouleau s'écarte de la tête d'impression, ce qui laisse toute latitude à l'utilisateur pour positionner le papier. Puis lorsqu'on referme le capot, le rouleau d'entraínement vient appuyer le papier contre la tête d'impression. Afin d'assurer un positionnement correct du rouleau par rapport à la tête d'impression, et donc d'assurer un maintien correct du papier, le rouleau vient en appui sur une butée fixée sur le bâti de l'imprimante.In the state of the art, bank payment terminals portable have a thermal head having a width of about 58 mm, and comprising approximately 384 printing dots. This represents a definition of 6.6 points per millimeter. This print head is attached to the printer frame by an elastic device which gives the head printer mobility in one direction. Thermal paper is held against the print head by a drive roller. The drive roller is integral with the cover of the loading magazine in paper. So when you open this cover to reload the printer for paper, the roller moves away from the print head, which gives you complete freedom the user to position the paper. Then when the cover is closed, the drive roller presses the paper against the print head. To ensure correct positioning of the roller relative to the head printing, and therefore to ensure proper maintenance of the paper, the roller comes to rest on a stop fixed on the printer frame.

La figure 1 montre une tête d'impression 101 fixée à un bâti 102 par une liaison élastique 103 qui confère à la tête 101 une mobilité suivant une direction horizontale. Une feuille de papier 104 est maintenue contre la tête 103 par un rouleau 105. Le rouleau 105 est en appui sur une butée 106 fixée au bâti 102. D'autre part le rouleau 105 est mobile autour d'une charnière 107.Figure 1 shows a print head 101 fixed to a frame 102 by an elastic link 103 which gives the head 101 mobility according to a horizontal direction. A sheet of paper 104 is held against the head 103 by a roller 105. The roller 105 is in abutment on a stop 106 fixed to the frame 102. On the other hand the roller 105 is movable around a hinge 107.

Le problème de ce dispositif est que lors de sa réalisation il cumule de nombreuses cotations et tolérances qui doivent être tenues pour assurer un positionnement correct du rouleau 105. Les cotations portent sur le bâti, sur la butée 106, sur la charnière 107 et sur la tête 101 d'impression. En effet si la liaison 103 permet de récupérer un léger défaut au niveau d'un positionnement horizontal du rouleau, elle ne permet pas de récupérer un défaut sur le positionnement vertical. Il faut donc que la butée 106 soit fixée très précisément par rapport au bâti 102. De même il faut que le jeu de la charnière 107 soit nul. Il s'agit donc d'une solution difficile à mettre en oeuvre.The problem with this device is that when it is made, it accumulates many quotes and tolerances that must be maintained to ensure correct positioning of roller 105. The dimensions relate to the frame, to the stop 106, on the hinge 107 and on the print head 101. Indeed if the link 103 makes it possible to recover a slight defect in a horizontal positioning of the roller, it does not allow a defect in vertical positioning. So stop 106 must be fixed very precisely with respect to the frame 102. Similarly, the play of the hinge 107 is zero. It is therefore a difficult solution to implement.

L'invention résout ces problèmes d'une part en solidarisant la butée et la tête d'impression, d'autre part en rendant la tête d'impression mobile selon deux directions. Dès lors la tête d'impression permet de rattraper des erreurs de positionnement du rouleau d'entraínement dû à un mauvais usinage ou à des cotations tenues mais en limite, suivant une direction horizontale et une direction verticale.The invention solves these problems on the one hand by securing the stop and the print head, on the other hand by making the print head mobile according to two directions. Therefore the print head allows to catch errors positioning of the drive roller due to incorrect machining or quotations held but at the limit, in a horizontal direction and a vertical direction.

L'invention a donc pour objet une imprimante thermique comportant un bâti, une tête d'impression, un rouleau d'entraínement du papier, et une buté de calage du rouleau d'entraínement caractérisé en ce que la buté de calage du rouleau d'entraínement est rigidement fixée à la tête d'impression.The invention therefore relates to a thermal printer comprising a frame, a print head, a paper feed roller, and a timing roller stopper characterized in that the stopper wedging the drive roller is rigidly fixed to the print head.

La présente invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles- ci ne sont présentées qu'à titre indicatif et nullement limitatif de l'invention. Les figures montrent :

  • Figure 1 : une illustration du dispositif tel qu'existant dans l'état de la technique.
  • Figure 2 : une illustration du dispositif selon l'invention.
  • Figure 3 : une illustration du dispositif selon l'invention avec le capot ouvert.
  • Figure 4 : une illustration du dispositif selon l'invention avec le capot fermé.
    • The present invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented for information only and in no way limit the invention. The figures show:
  • Figure 1: an illustration of the device as existing in the state of the art.
  • Figure 2: an illustration of the device according to the invention.
  • Figure 3: an illustration of the device according to the invention with the cover open.
  • Figure 4: an illustration of the device according to the invention with the cover closed.

    • La figure 2 montre un bâti 201 d'un dispositif 200 impression. Le dispositif 200 d'impression peut être une imprimante ou tout autre dispositif nécessitant que des renseignements soient imprimés, comme un terminal de paiement bancaire. La figure 2 montre aussi une tête d'impression 202. Cette tête d'impression est d'une largeur sensiblement égale à celle du papier sur laquelle elle doit imprimer, et elle comporte des éléments chauffants qui permettent de brûler ce papier. Dans notre exemple la tête d'impression a une largeur de 58mm, et comporte 384 éléments chauffants indépendants. Ces éléments constituent une ligne et peuvent être actionnés indépendamment. Cela revient à dire qu'une ligne de l'image imprimée comporte 384 pixels. La tête d'impression 202 est fixée sur un radiateur 203. Le radiateur 203 est un dispositif fait d'un matériau qui permet de dissiper l'excédent de chaleur produit par la tête 202. Généralement un radiateur est un dispositif plan. Dans l'invention le radiateur 203 comporte une excroissance 204. Cette excroissance 204 sert de butée à un axe 205 d'un rouleau 206 d'entraínement du papier, elle est aussi utile pour la dissipation de l'excédent de chaleur et permettra aux éléments chauffants composant la tête 202 de refroidir.FIG. 2 shows a frame 201 of a printing device 200. The 200 printing device can be a printer or any other device requiring information to be printed, such as a bank payment. Figure 2 also shows a print head 202. This print head is substantially equal in width to that of paper on which it should print, and it has heating elements which let you burn this paper. In our example the print head has a width of 58mm, and has 384 independent heating elements. These elements constitute a line and can be activated independently. This is like saying that a line of the printed image has 384 pixels. The print head 202 is fixed to a radiator 203. The radiator 203 is a device made of a material which makes it possible to dissipate the excess heat produced by the head 202. Generally a radiator is a flat device. In the invention, the radiator 203 comprises a protrusion 204. This protrusion 204 serves as a stop for an axis 205 of a 206 paper feed roller, it is also useful for dissipation of excess heat and will allow the heating elements making up the head 202 to cool.

    La tête 202 est fixée sur le radiateur 203 de telle sorte que lorsque l'axe 205 du rouleau 206 est en appui sur l'excroissance 204, la ligne formée par les éléments chauffants de la tête 202 et la directrice de l'axe 205 sont parallèles et, il y a tangence entre la tête 202 et la surface du rouleau 206. Ainsi lorsqu'on positionne une feuille de papier 207 entre la tête 202 et le rouleau 206, la feuille 207 peut être entraínée par le rouleau 206. De plus comme il y a tangence entre le rouleau 206 et la tête 202 la feuille 207 peut être imprimée puisqu'elle est plaquée sur la tête 202 d'impression par le rouleau 206.The head 202 is fixed to the radiator 203 so that when the axis 205 of the roll 206 rests on the protrusion 204, the line formed by the heating elements of the head 202 and the director of the axis 205 are parallel and there is tangency between the head 202 and the surface of the roller 206. So when you place a sheet of paper 207 between the head 202 and the roller 206, the sheet 207 can be driven by the roller 206. In addition as there is tangency between the roller 206 and the head 202 the sheet 207 can be printed since it is pressed against the print head 202 by the roller 206.

    L'axe 205 est fixé à une branche 208 par une liaison pivot 209. L'axe 205 et le rouleau 206 peuvent donc avoir un mouvement de rotation autour de la liaison pivot 209. La branche 208 est fixée au bâti 201 par une charnière 210. La liaison entre l'axe 205 et la branche 208 peut être légèrement flottante. Lorsque l'on fait pivoter la branche 208 autour de la charnière 210, on éloigne le rouleau 206 de la tête 202. Cela permet de libérer le papier 207. Cela permet aussi d'accéder à un compartiment du dispositif auquel est incorporé le dispositif d'impression, ce compartiment contenant la réserve de papier. La branche 208 est en position ouverte, lorsque le rouleau 206 est le plus éloigné possible de la tête 202. La branche 202 est en position fermée lorsqu'il y a tangence entre le rouleau 206 et la tête 202.The axis 205 is fixed to a branch 208 by a pivot link 209. The axis 205 and the roller 206 can therefore have a rotational movement around of the pivot link 209. The branch 208 is fixed to the frame 201 by a hinge 210. The connection between the axis 205 and the branch 208 can be slightly floating. When you rotate the branch 208 around the hinge 210, the roller 206 is moved away from the head 202. This makes it possible to release the paper 207. This also allows access to a compartment of the device to which the printing device is incorporated, this compartment containing the paper supply. The branch 208 is in the open position, when the roller 206 is as far as possible from the head 202. The branch 202 is in the closed position when there is tangency between the roller 206 and the head 202.

    La figure 4 montre qu'en règle générale la branche 208 est un capot 401. Le rouleau 206 et le capot 401 sont donc solidaires dans un mouvement de rotation autour de l'axe de la charnière 210.Lorsque le capot est en position fermée il existe un dispositif de verrouillage non représenté. Ce dispositif de verrouillage limite la course du capot autour de la charnière 210. Lorsque le capot 401 est en position fermée, l'axe 205 est en appui sur la butée 204 et le rouleau 206 en appui sur la tête 202. Afin que ce résultat puisse être obtenu, le radiateur 203 est fixé au bâti 201 par un ressort 211 qui peut être compressé selon une direction horizontale, et par un ressort 212 qui peut être compressé selon une direction verticale. Dans cette description l'horizontale est définie lorsque l'appareil comportant le dispositif selon l'invention est placé à plat sur une table, dans la position normale prévue pour son fonctionnement par son constructeur. Dans la pratique il suffit que les directions de compression des ressorts 211 et 212 ne soient pas parallèles, et s'opposent toutes les deux à la mise en place du rouleau 206. Un bon positionnement du rouleau 206 par rapport à la tête 202 est donc assuré par une bonne réalisation de la butée 204.FIG. 4 shows that, as a general rule, branch 208 is a cover 401. The roller 206 and the cover 401 are therefore integral in a movement of rotation about the axis of the hinge 210.When the cover is in closed position there is a locking device not shown. This locking device limits the travel of the hood around the hinge 210. When the cover 401 is in the closed position, the axis 205 is supported on the stop 204 and the roller 206 pressing on the head 202. So that this result can be obtained, the radiator 203 is fixed to the frame 201 by a spring 211 which can be compressed in a horizontal direction, and by a spring 212 which can be compressed in a vertical direction. In this description the horizontal is defined when the device including the device according to the invention is placed flat on a table, in the normal position provided for its operation by its manufacturer. In practice it it suffices that the compression directions of the springs 211 and 212 are not not parallel, and both oppose the placement of the roller 206. Proper positioning of the roller 206 relative to the head 202 is therefore ensured by good completion of the stop 204.

    La figure 3 illustre le fait que la figure 2 était une vue de côté. La figure 3 montre qu'il existe une excroissance sur laquelle l'axe 205 vient en butée de part et d'autre de la tête 202. Il y a donc une excroissance 204 et une excroissance 204b. L'axe 205 prend appui à la fois sur la butée 204 et sur la butée 204b.Figure 3 illustrates that Figure 2 was a side view. The figure 3 shows that there is a protrusion on which the axis 205 abuts on either side of the head 202. There is therefore a protrusion 204 and a outgrowth 204b. The axis 205 is supported both on the stop 204 and on the stop 204b.

    La figure 3 montre aussi que l'axe 205 est solidaire, par exemple, d'un engrenage 301. C'est grâce à cet engrenage 301 que le rouleau 206 peut être entraíné en rotation, et donc entraíner le papier pour le faire défiler devant la tête 202. L'ensemble axe 205, rouleau 206 et engrenage 301 est mobile en rotation autour d'un axe 302 parallèle à la tête 202. Cela permet de venir plaquer le rouleau 206 contre la tête 202, ou de libérer un accès à un compartiment dans lequel on place la réserve de papier de l'imprimante.FIG. 3 also shows that the axis 205 is integral, for example, with a gear 301. It is thanks to this gear 301 that the roller 206 can be rotated, and therefore drag the paper to scroll in front of the head 202. The axle 205, roller 206 and gear 301 assembly is movable in rotation about an axis 302 parallel to the head 202. This allows to press the roller 206 against the head 202, or to free access to a compartment in which to place the paper reserve of the printer.

    Pour l'entraínement du rouleau 206 en rotation, soit l'engrenage 301 vient s'engrener sur un engrenage fixé sur le bâti 201. Dans ce cas l'engrenage fixé sur le bâti 201 est entraíné en rotation par un moteur compris dans le dispositif . Soit l'engrenage 301 est engrené sur un dispositif qui est comporté dans le capot 401. Cette dernière solution dispense d'avoir à prévoir des moyens pour que l'engrenage 301 s'engrène correctement sur un engrenage qui serait fixé au bâti 201. En effet dans cette dernière solution le dispositif d'entraínement en rotation du rouleau 206 est totalement solidaire, dans son mouvement autour de l'axe 302, de l'axe 205 et du rouleau 206. On supprime ainsi les problèmes liés au positionnement relatif de deux engrenages qui doivent s'engrener correctement.For driving the rotating roller 206, or the gear 301 comes to mesh on a gear fixed on the frame 201. In this case the gear fixed on the frame 201 is rotated by a motor included in the device. Either gear 301 is meshed on a device which is included in the cover 401. This latter solution dispenses with having to provide means so that the gear 301 meshes properly on a gear which would be fixed to the frame 201. Indeed in this latter solution the device for rotating the roller 206 is completely integral, in its movement around axis 302, with axis 205 and the roller 206. This eliminates the problems associated with relative positioning two gears which must mesh correctly.

    Claims (5)

    Imprimante thermique comportant un bâti (201), une tête (202) d'impression, un rouleau (206) d'entraínement du papier, et une butée (204) de calage du rouleau d'entraínement caractérisé en ce que: la butée de calage du rouleau d'entraínement est rigidement fixée à la tête d'impression, et la butée est une prolongation d'un radiateur (203) de la tête d'impression. Thermal printer comprising a frame (201), a print head (202), a paper drive roller (206), and a stop (204) for setting the drive roller, characterized in that: the setting stop of the drive roller is rigidly fixed to the print head, and the stopper is an extension of a radiator (203) of the print head. Imprimante selon la revendication 1, caractérisé en ce que la tête thermique et son radiateur sont solidaires du bâti par l'intermédiaire de ressorts (211, 212) selon au moins deux directions différentes.Printer according to claim 1, characterized in that the head and its radiator are secured to the frame by means of springs (211, 212) in at least two different directions. Imprimante selon la revendication 2, caractérisé en ce que l'un des ressorts au moins s'oppose à la mise en place du rouleau d'entraínement.Printer according to claim 2, characterized in that one of the springs at least opposes the establishment of the drive roller. Imprimante selon la revendication 3, caractérisé en ce que le rouleau d'entraínement est fixé sur un support (208) mobile autour d'un axe (210).Printer according to claim 3, characterized in that the drive roller is fixed on a support (208) movable around an axis (210). Imprimante selon l'une des revendications 3 ou 4, caractérisé en ce que le support du rouleau d'entraínement est un capot (401) d'un compartiment de l'imprimante.Printer according to one of claims 3 or 4, characterized in that the support of the drive roller is a cover (401) of a printer compartment.
    EP00402534A 1999-09-16 2000-09-13 Thermal printer Withdrawn EP1084853A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9911569A FR2798619B1 (en) 1999-09-16 1999-09-16 THERMAL PRINTER
    FR9911569 1999-09-16

    Publications (1)

    Publication Number Publication Date
    EP1084853A1 true EP1084853A1 (en) 2001-03-21

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    EP00402534A Withdrawn EP1084853A1 (en) 1999-09-16 2000-09-13 Thermal printer

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    US (1) US6646667B1 (en)
    EP (1) EP1084853A1 (en)
    JP (1) JP3438816B2 (en)
    FR (1) FR2798619B1 (en)

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    FR2798619B1 (en) 2001-11-23
    JP3438816B2 (en) 2003-08-18
    JP2001130088A (en) 2001-05-15
    US6646667B1 (en) 2003-11-11
    FR2798619A1 (en) 2001-03-23

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