EP0672601A1 - Device for feeding sheets or envelopes which are to be printed - Google Patents

Device for feeding sheets or envelopes which are to be printed Download PDF

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Publication number
EP0672601A1
EP0672601A1 EP94118175A EP94118175A EP0672601A1 EP 0672601 A1 EP0672601 A1 EP 0672601A1 EP 94118175 A EP94118175 A EP 94118175A EP 94118175 A EP94118175 A EP 94118175A EP 0672601 A1 EP0672601 A1 EP 0672601A1
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EP
European Patent Office
Prior art keywords
angle
flat
magazine
inclined plane
materials
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.)
Granted
Application number
EP94118175A
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German (de)
French (fr)
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EP0672601B1 (en
Inventor
Giuseppe Bortolotti
Jorge Costa
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.)
Olivetti Engineering SA
Original Assignee
OCD SA
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Publication date
Application filed by OCD SA filed Critical OCD SA
Publication of EP0672601A1 publication Critical patent/EP0672601A1/en
Application granted granted Critical
Publication of EP0672601B1 publication Critical patent/EP0672601B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223—Retainers of the pad-type, e.g. friction pads

Definitions

  • the invention relates to a device for introducing flat materials to be printed, such as sheets of paper and / or envelopes, for printers or typewriters comprising a magazine with a substantially flat bottom in which a stack of said flat materials is arranged and from which these materials are extracted one by one and introduced into the printer, drive rollers arranged on a drive shaft so as to move the upper flat material of the stack to bring it into the printer or the machine write, the device further comprising at least one retaining member intended to retain the flat materials disposed in said stack under the upper flat material.
  • Such devices are known for introducing sheets of paper used in printers, typewriters or even in other devices, such as photocopiers. These devices very frequently use, as a retaining member, retaining corners under which the upper sheet is extracted during its introduction. If these retaining corners can be satisfactory for use with relatively thin and not very rigid sheets, the use of thicker and rigid sheets or envelopes is no longer possible with this type of retaining members.
  • the object of the present invention is to remedy this drawback and to create a device allowing the introduction of flat materials to be printed of very different rigidity ranging from very thin sheet to card stock or envelopes.
  • the retaining member comprises at least one movable part mounted movably on the magazine and having an upper surface intended to come into contact with the front edge of said flat materials to constitute a bearing surface with variable orientation for said flat materials disposed downstream of the drive rollers, the orientation of this variable bearing surface relative to said substantially planar bottom being adjusted as a function of the rigidity of said flat materials to be printed, l 'angle between this variable bearing surface and a plane parallel to said bottom being greater for less rigid materials and lower for rigid materials.
  • the retaining member automatically adapts or can be adjusted manually to the rigidity of the sheets or envelopes to be introduced.
  • the retaining part is fixed, an angle that is too small corresponding to a strong inclination of this part would not make it possible to retain the underlying sheets effectively, which would then be partially entrained with the upper sheet, if these sheets are thin and not very rigid; on the contrary, envelopes or rigid sheets could not be extracted with a fixed retaining piece, if its angle with the support is too large.
  • the retaining piece is mobile and therefore has a bearing surface with variable orientation, which allows the introduction of very different stiffness and thickness materials.
  • the retaining member further comprises a fixed inclined plane making a predetermined angle with a plane parallel to said bottom, the moving parts being urged elastically towards a rest position, in which their bearing surface variable makes an angle with a plane parallel to said bottom greater than said predetermined angle of the fixed inclined plane, the moving parts being oriented by the flat material during its introduction so that the angle of the variable bearing surface with the plane parallel to said plane bottom decreases according to the increase in the rigidity of the flat material to be introduced.
  • the device comprises at least two moving parts constituted by leaf springs fixed by one of their ends to the magazine.
  • This arrangement allows a very simple, reliable and inexpensive construction.
  • Figure 1 shows a cross-sectional view of the device in the rest position.
  • Figure 2 is a front view of the device.
  • Figure 3 shows a side view
  • Figures 4a and 4b are partial views in cross section of the device during the introduction of a rigid sheet, respectively not very rigid.
  • Figures 5 and 6 are partial cross-sectional views of two variants.
  • the introduction device 1 illustrated in Figures 1 to 4 is removably mounted on a printer 2 of which only part of the frame 3 and the introduction channel 4 are shown.
  • the device 1 may of course also be integral with the printer, the typewriter or any other device using flat materials, such as sheets of paper, card stock or envelopes.
  • the device 1 comprises a magazine 6 with a bottom 8, a front wall 9, two fixed side walls 10 and 11, and a support plate 12 on which a stack of sheets 14, envelopes or any other flat material can be willing.
  • the support plate 12 is pivotally articulated on the side walls 10, 11 by means of two pivots 15 and biased by a spring 16 in the direction of the drive rollers 17, 18 mounted on a drive shaft 20.
  • the latter is connected via a gear train 21 to a motor 22.
  • the magazine 6 further comprises a movable lateral guide 25 slidably mounted in a lateral direction on the upper part of the support plate 12 in order to be able to adapt the width of device for introducing different formats of sheets or envelopes.
  • the movable lateral guide 25 and the lateral wall 10 are each provided with guide elements 26, 27 defining an insertion channel for the sheets and facilitating the placing of the stack of sheets 14 in the magazine 6.
  • the front wall 9 of the magazine has an extension 30 comprising a first portion 31 forming a fixed inclined plane making a predetermined angle ⁇ with a plane parallel to the bottom 8 of the magazine and a second curved final portion 32 substantially parallel to said bottom 8.
  • This extension 30 further comprises three openings 34 and three leaf springs 35 curved at their free ends 36. These leaf springs 35 are arranged along the front wall 9 and fixed to the bottom 8 of the magazine 6. Their the curved free ends 36 extend inside the openings 34.
  • the non-curved part 37 of the spring blades 35 makes an angle ⁇ greater than the angle ⁇ with a plane parallel to the bottom 8.
  • the three blades springs 35 in combination with the fixed inclined plane 31 thus constitute a retaining member 40 disposed downstream of the drive rollers 17.
  • the upper surface of the non-bent portion 37 of the spring blades 35 acts as a bearing surface with variable orientation for sheets or envelopes.
  • the angle ⁇ between this bearing surface and a plane parallel to the bottom 8 of the magazine is variable depending on the rigidity of the materials to be introduced. This angle ⁇ is greater for thin and not very rigid sheets where it approaches 90 °, see FIG. 4B.
  • the leaf springs 35 serving as bearing surface are strongly pushed down in FIG. 4a by the rigid sheet, so as to obtain an adequate inclination to introduce the rigid sheet while retaining the underlying sheets or envelopes.
  • the angle ⁇ becomes equal to the angle ⁇ and the rigid sheet extracted slides simultaneously on the fixed inclined plane 31 and on the upper surface of the leaf springs 35 which are retracted into the openings 34.
  • the angle ⁇ between the fixed inclined plane 31 and a plane parallel to the bottom 8 is preferably chosen between 30 ° and 80 °, very advantageously between 60 ° and 65 °; it is in the configuration illustrated in Figures 1 and 4, 63 °.
  • the inclination of this fixed inclined plane 31 relative to the front wall 9 is therefore between 10 ° and 60 °, and is in Figures 1 and 4 by 27 °.
  • variable angle ⁇ between the variable bearing surface of the non-curved part 37 of the leaf springs 35 therefore varies substantially between 90 ° and the angle ⁇ , namely 63 ° in the case of FIGS. 1 and 4.
  • the suitable slope or angle ⁇ is automatically adjusted by the flat material to be introduced itself, and this as a function of its rigidity.
  • the introduction device is further provided with an additional retaining member 42.
  • the latter is constituted by a retaining corner 43 intended to cooperate with one of the corners of the front edge of the sheets.
  • This retaining corner 43 is integral with a lever 44 pivotally articulated on the side wall 10 by means of a pivot 45.
  • a notching member 46 makes it possible to retain the lever 44 in two positions determined by three stops 47, 48 and 49
  • the retaining corner 43 is in the active position and serves as an additional retaining member for thin and not very rigid sheets.
  • the retaining wedge 43 is retracted. This position is used for rigid or thick materials, such as envelopes.
  • the device could of course also function satisfactorily without the additional retaining member 42, but the latter constitutes an additional safety element making the device particularly reliable even with very thin sheets.
  • the upper surfaces of the fixed inclined plane 31, of the extension 30 and possibly of the leaf springs 35 may be covered with a layer of substance modifying the coefficient of friction, such as a thin layer of tetrafluoroethylene. This layer is then used more particularly to erase the fine unevenness and roughness of the device manufacturing.
  • FIG. 5 represents a variant of the device in which spring blades 35 are replaced by levers 50 pivotally mounted by means of an axis 51 on the wall 9 of the magazine 6.
  • Springs 52 urge the levers 50 in a rest position, such that 'illustrated in Figure 5, wherein the upper bearing surface 53 of the lever makes an angle close to 90 ° with a plane parallel to the bottom 8.
  • This position corresponds to an introduction of very slightly rigid sheets.
  • the lever 50 is tilted anti-clockwise in FIG. 5 so as to be practically retracted inside the opening 34 in the extension 30.
  • the envelopes then also cooperate with the fixed inclined plane 31.
  • the retaining member may be formed by a single piece 60, lever or plate, of a substantially equal width to the width of the insertion device and pivotally mounted on the front wall 9.
  • the pivoting or tilting movement of this part is delimited in both directions by stops 61, 62 so that the upper bearing surface with variable orientation of this part 60 has an angle ⁇ with a plane parallel to the bottom 8 varying between substantially 90 ° and 60 °.
  • An elastic element such as a spring 64, biases the part towards a rest position against the stop 61 in which the angle ⁇ is substantially 90 °.
  • the extension 30 of the front wall 9 is eliminated in this variant.
  • the embodiments described above are in no way limiting and that they can receive any desirable modifications inside the frame as defined by claim 1.
  • the position of the magazine 6 may be different, its bottom 8 could be inclined or horizontal.
  • the support plate 12 may be fixed, the drive rollers would then be stressed during an insertion operation elastically against the sheets to be extracted.
  • the number of leaf springs 35 may be different from three, for example four or more.
  • drive rollers it is also possible to provide other members, such as a striking cylinder or drive lugs.
  • these springs may be replaced by a manual or other adjustment device making it possible to adjust the part of the upper bearing surface of this lever according to the sheets or envelopes to introduce.
  • the device may also include an additional retaining member 42 comprising two retractable retaining corners 43.

Abstract

The paper is fed int the inlet chute (4) of the printer (2) from a store (6) having a front wall (9) and a plate (12) supporting a stack (14) which is urged by a spring (16) against a driving roller (17). Part of an extension (30) of the front wall forms a fixed inclined plane (31) with three openings (34) accepting the curved portions (36) of leaf springs (35). These form with the plane a retainer (40) whose slope can be gentle for thin sheets of paper, or steeper for envelopes or thick sheets.

Description

L'invention concerne un dispositif d'introduction de matériaux plats à imprimer, tels que des feuilles de papier et/ou des enveloppes, pour imprimantes ou machines à écrire comprenant un magasin à fond sensiblement plan dans lequel une pile desdits matériaux plats est disposée et duquel ces matériaux sont extraits un à un et introduits dans l'imprimante, des galets d'entraînement agencés sur un arbre d'entraînement de façon à déplacer le matériau plat supérieur de la pile pour l'amener dans l'imprimante ou la machine à écrire, le dispositif comprenant en outre au moins un organe de retenue destiné à retenir les matériaux plats disposés dans ladite pile sous le matériau plat supérieur.The invention relates to a device for introducing flat materials to be printed, such as sheets of paper and / or envelopes, for printers or typewriters comprising a magazine with a substantially flat bottom in which a stack of said flat materials is arranged and from which these materials are extracted one by one and introduced into the printer, drive rollers arranged on a drive shaft so as to move the upper flat material of the stack to bring it into the printer or the machine write, the device further comprising at least one retaining member intended to retain the flat materials disposed in said stack under the upper flat material.

On connaît de tels dispositifs d'introduction de feuilles de papier utilisés dans des imprimantes, des machines à écrire ou encore dans d'autres appareils, tels que des photocopieurs. Ces dispositifs utilisent très fréquemment en tant qu'organe de retenue des coins de retenue sous lesquels la feuille supérieure est extraite lors de son introduction. Si ces coins de retenue peuvent donner satisfaction pour un usage avec des feuilles relativement minces et peu rigides, une utilisation de feuilles plus épaisses et rigides ou d'enveloppes n'est plus possible avec ce type d'organes de retenue.Such devices are known for introducing sheets of paper used in printers, typewriters or even in other devices, such as photocopiers. These devices very frequently use, as a retaining member, retaining corners under which the upper sheet is extracted during its introduction. If these retaining corners can be satisfactory for use with relatively thin and not very rigid sheets, the use of thicker and rigid sheets or envelopes is no longer possible with this type of retaining members.

La présente invention a pour but de remédier à cet inconvénient et de créer un dispositif permettant l'introduction de matériaux plats à imprimer de rigidité très différente allant de la feuille très mince au papier cartonné ou à des enveloppes.The object of the present invention is to remedy this drawback and to create a device allowing the introduction of flat materials to be printed of very different rigidity ranging from very thin sheet to card stock or envelopes.

L'invention est caractérisée à cet effet par le fait que l'organe de retenue comporte au moins une pièce mobile montée de façon mobile sur le magasin et présentant une surface supérieure destinée à entrer en contact avec le bord antérieur desdits matériaux plats pour constituer une surface d'appui à orientation variable pour lesdits matériaux plats disposés en aval des galets d'entraînement, l'orientation de cette surface d'appui variable par rapport audit fond sensiblement plan étant réglée en fonction de la rigidité desdits matériaux plats à imprimer, l'angle entre cette surface d'appui variable et un plan parallèle audit fond étant plus grand pour des matériaux peu rigides et plus faible pour des matériaux rigides.The invention is characterized for this purpose by the fact that the retaining member comprises at least one movable part mounted movably on the magazine and having an upper surface intended to come into contact with the front edge of said flat materials to constitute a bearing surface with variable orientation for said flat materials disposed downstream of the drive rollers, the orientation of this variable bearing surface relative to said substantially planar bottom being adjusted as a function of the rigidity of said flat materials to be printed, l 'angle between this variable bearing surface and a plane parallel to said bottom being greater for less rigid materials and lower for rigid materials.

De cette manière l'organe de retenue s'adapte automatiquement ou peut être ajusté d'une manière manuelle à la rigidité des feuilles ou des enveloppes à introduire.In this way the retaining member automatically adapts or can be adjusted manually to the rigidity of the sheets or envelopes to be introduced.

Au cas où la pièce de retenue serait fixe, un angle trop faible correspondant à une forte inclinaison de cette pièce ne permettrait pas de retenir les feuilles sous-jacentes de manière efficace, qui seraient alors partiellement entraînées avec la feuille supérieure, si ces feuilles sont fines et peu rigides; au contraire des enveloppes ou des feuilles rigides ne pourraient être extraites avec une pièce de retenue fixe, si son angle avec le support est trop grand. Dans la présente invention, la pièce de retenue est mobile et présente donc une surface d'appui à orientation variable, ce qui permet l'introduction de matériaux de rigidité et d'épaisseur fort différentes.If the retaining part is fixed, an angle that is too small corresponding to a strong inclination of this part would not make it possible to retain the underlying sheets effectively, which would then be partially entrained with the upper sheet, if these sheets are thin and not very rigid; on the contrary, envelopes or rigid sheets could not be extracted with a fixed retaining piece, if its angle with the support is too large. In the present invention, the retaining piece is mobile and therefore has a bearing surface with variable orientation, which allows the introduction of very different stiffness and thickness materials.

Selon un mode d'exécution préféré, l'organe de retenue comprend en outre un plan incliné fixe faisant un angle prédéterminé avec un plan parallèle audit fond, les pièces mobiles étant sollicitées élastiquement vers une position de repos, dans laquelle leur surface d'appui variable fait un angle avec un plan parallèle audit fond supérieur audit angle prédéterminé du plan incliné fixe, les pièces mobiles étant orientées par le matériau plat lors de son introduction de façon que l'angle de la surface d'appui variable avec le plan parallèle audit fond diminue en fonction de l'augmentation de la rigidité du matériau plat à introduire.According to a preferred embodiment, the retaining member further comprises a fixed inclined plane making a predetermined angle with a plane parallel to said bottom, the moving parts being urged elastically towards a rest position, in which their bearing surface variable makes an angle with a plane parallel to said bottom greater than said predetermined angle of the fixed inclined plane, the moving parts being oriented by the flat material during its introduction so that the angle of the variable bearing surface with the plane parallel to said plane bottom decreases according to the increase in the rigidity of the flat material to be introduced.

Par cette disposition on obtient un réglage automatique de l'orientation de la surface d'appui en fonction de la rigidité du matériau à introduire, sans que l'opérateur n'ait à effectuer un quelconque réglage.By this arrangement, an automatic adjustment of the orientation of the bearing surface is obtained as a function of the rigidity of the material to be introduced, without the operator having to make any adjustment.

Avantageusement, le dispositif comprend au moins deux pièces mobiles constituées par des lames ressorts fixées par une de leur extrémité sur le magasin.Advantageously, the device comprises at least two moving parts constituted by leaf springs fixed by one of their ends to the magazine.

Cette disposition permet une construction très simple, fiable et peu onéreuse.This arrangement allows a very simple, reliable and inexpensive construction.

D'autres avantages ressortent des caractéristiques exprimées dans les revendications dépendantes et de la description exposant ci-après l'invention plus en détail à l'aide de dessins qui représentent schématiquement et à titre d'exemple un mode d'exécution et des variantes.Other advantages emerge from the characteristics expressed in the dependent claims and from the description setting out the invention below in more detail with the aid of drawings which schematically represent, by way of example, an embodiment and variants.

La figure 1 représente une vue en coupe transversale du dispositif dans la position de repos.Figure 1 shows a cross-sectional view of the device in the rest position.

La figure 2 est une vue de face du dispositif.Figure 2 is a front view of the device.

La figure 3 représente une vue de côté.Figure 3 shows a side view.

Les figures 4a et 4b sont des vues partielles en coupe transversale du dispositif lors de l'introduction d'une feuille rigide, respectivement peu rigide.Figures 4a and 4b are partial views in cross section of the device during the introduction of a rigid sheet, respectively not very rigid.

Les figures 5 et 6 sont des vues partielles en coupe transversale de deux variantes.Figures 5 and 6 are partial cross-sectional views of two variants.

Le dispositif d'introduction 1 illustré aux figures 1 à 4 est monté de façon amovible sur une imprimante 2 dont seule une partie du bâti 3 et le canal d'introduction 4 sont représentés. Le dispositif 1 pourra bien entendu également être solidaire ou de l'imprimante, de la machine à écrire ou de tout autre appareil utilisant des matériaux plats, telles que des feuilles de papier, du papier cartonné ou des enveloppes. Le dispositif 1 comporte un magasin 6 avec un fond 8, une paroi antérieure 9, deux parois latérales fixes 10 et 11, et une plaque de support 12 sur laquelle une pile de feuilles 14, d'enveloppes ou de tous autres matériaux plats peut être disposée.The introduction device 1 illustrated in Figures 1 to 4 is removably mounted on a printer 2 of which only part of the frame 3 and the introduction channel 4 are shown. The device 1 may of course also be integral with the printer, the typewriter or any other device using flat materials, such as sheets of paper, card stock or envelopes. The device 1 comprises a magazine 6 with a bottom 8, a front wall 9, two fixed side walls 10 and 11, and a support plate 12 on which a stack of sheets 14, envelopes or any other flat material can be willing.

La plaque de support 12 est articulée pivotante sur les parois latérales 10, 11 au moyen de deux pivots 15 et sollicitée par un ressort 16 en direction des galets d'entraînement 17, 18 montés sur un arbre d'entraînement 20. Ce dernier est relié par l'intermédiaire d'un train d'engrenages 21 à un moteur 22. Le magasin 6 comporte en outre un guide latéral mobile 25 monté de façon coulissante suivant une direction latérale sur la partie supérieure de la plaque de support 12 pour pouvoir adapter la largeur du dispositif d'introduction à différents formats de feuilles ou d'enveloppes. Le guide latéral mobile 25 et la paroi latérale 10 sont chacun munis d'éléments de guidage 26, 27 définissant un canal d'introduction pour les feuilles et facilitant la mise en place de la pile de feuilles 14 dans le magasin 6.The support plate 12 is pivotally articulated on the side walls 10, 11 by means of two pivots 15 and biased by a spring 16 in the direction of the drive rollers 17, 18 mounted on a drive shaft 20. The latter is connected via a gear train 21 to a motor 22. The magazine 6 further comprises a movable lateral guide 25 slidably mounted in a lateral direction on the upper part of the support plate 12 in order to be able to adapt the width of device for introducing different formats of sheets or envelopes. The movable lateral guide 25 and the lateral wall 10 are each provided with guide elements 26, 27 defining an insertion channel for the sheets and facilitating the placing of the stack of sheets 14 in the magazine 6.

En référence aux figures 1, 4a et 4b la paroi antérieure 9 du magasin présente un prolongement 30 comportant une première portion 31 formant un plan incliné fixe faisant un angle prédéterminé α avec un plan parallèle au fond 8 du magasin et une seconde portion finale recourbée 32 sensiblement parallèle audit fond 8. Ce prolongement 30 comporte en outre trois ouvertures 34 et trois lames ressorts 35 recourbées à leurs extrémités libres 36. Ces lames ressorts 35 sont disposées le long de la paroi antérieure 9 et fixées au fond 8 du magasin 6. Leurs extrémités libres 36 recourbées se prolongent à l'intérieur des ouvertures 34.With reference to FIGS. 1, 4a and 4b, the front wall 9 of the magazine has an extension 30 comprising a first portion 31 forming a fixed inclined plane making a predetermined angle α with a plane parallel to the bottom 8 of the magazine and a second curved final portion 32 substantially parallel to said bottom 8. This extension 30 further comprises three openings 34 and three leaf springs 35 curved at their free ends 36. These leaf springs 35 are arranged along the front wall 9 and fixed to the bottom 8 of the magazine 6. Their the curved free ends 36 extend inside the openings 34.

Dans la position de repos, telle qu'illustrée à la figure 1 et à la figure 4B, la partie non recourbée 37 des lames ressorts 35 fait un angle β supérieur à l'angle α avec un plan parallèle au fond 8. Les trois lames ressorts 35 en combinaison avec le plan incliné fixe 31 constituent ainsi un organe de retenue 40 disposé en aval des galets d'entraînement 17. La surface supérieure de la partie non recourbée 37 des lames ressorts 35 fait fonction de surface d'appui à orientation variable pour les feuilles ou les enveloppes. L'angle β entre cette surface d'appui et un plan parallèle au fond 8 du magasin est variable en fonction de la rigidité des matériaux à introduire. Cet angle β est plus grand pour des feuilles fines et peu rigides où il se rapproche de 90°, voir figure 4B. Par contre pour des feuilles rigides, tel que du papier cartonné ou des enveloppes, les lames ressorts 35 servant de surface d'appui sont fortement poussées vers le bas à la figure 4a par la feuille rigide, de façon à obtenir une inclinaison adéquate pour introduire la feuille rigide tout en retenant les feuilles ou enveloppes sous-jacentes. Dans ce cas de matériaux rigides, l'angle β devient égal à l'angle α et la feuille rigide extraite coulisse simultanément sur le plan incliné fixe 31 et sur la surface supérieure des lames ressorts 35 qui sont escamotées dans les ouvertures 34.In the rest position, as illustrated in FIG. 1 and in FIG. 4B, the non-curved part 37 of the spring blades 35 makes an angle β greater than the angle α with a plane parallel to the bottom 8. The three blades springs 35 in combination with the fixed inclined plane 31 thus constitute a retaining member 40 disposed downstream of the drive rollers 17. The upper surface of the non-bent portion 37 of the spring blades 35 acts as a bearing surface with variable orientation for sheets or envelopes. The angle β between this bearing surface and a plane parallel to the bottom 8 of the magazine is variable depending on the rigidity of the materials to be introduced. This angle β is greater for thin and not very rigid sheets where it approaches 90 °, see FIG. 4B. On the other hand, for rigid sheets, such as cardstock or envelopes, the leaf springs 35 serving as bearing surface are strongly pushed down in FIG. 4a by the rigid sheet, so as to obtain an adequate inclination to introduce the rigid sheet while retaining the underlying sheets or envelopes. In this case of rigid materials, the angle β becomes equal to the angle α and the rigid sheet extracted slides simultaneously on the fixed inclined plane 31 and on the upper surface of the leaf springs 35 which are retracted into the openings 34.

L'angle α entre le plan incliné fixe 31 et un plan parallèle au fond 8 est de préférence choisi entre 30° et 80°, très avantageusement entre 60° et 65°; il est dans la configuration illustrée aux figures 1 et 4, de 63°. L'inclinaison de ce plan incliné fixe 31 par rapport à la paroi antérieure 9 se situe donc entre 10° et 60°, et est dans les figures 1 et 4 de 27°.The angle α between the fixed inclined plane 31 and a plane parallel to the bottom 8 is preferably chosen between 30 ° and 80 °, very advantageously between 60 ° and 65 °; it is in the configuration illustrated in Figures 1 and 4, 63 °. The inclination of this fixed inclined plane 31 relative to the front wall 9 is therefore between 10 ° and 60 °, and is in Figures 1 and 4 by 27 °.

L'angle variable β entre la surface d'appui variable de la partie non recourbée 37 des lames ressorts 35 varie donc sensiblement entre 90° et l'angle α , à savoir 63° dans le cas des figures 1 et 4.The variable angle β between the variable bearing surface of the non-curved part 37 of the leaf springs 35 therefore varies substantially between 90 ° and the angle α, namely 63 ° in the case of FIGS. 1 and 4.

Au cas où le dispositif ne présentait qu'un plan incliné fixe, il faudrait donner un angle α relativement faible proche de 65° pour que des feuilles rigides ou des enveloppes puissent être extraites; sans cela ces matériaux plats rigides risqueraient de se crocher sur le plan incliné fixe 31. Avec un tel angle α relativement faible, les feuilles minces et peu rigides ne pourront plus être introduites une à une, étant donné que les feuilles sousjacentes ne seront plus suffisamment retenues et seront au moins partiellement entraînées avec la feuille supérieure.If the device had only a fixed inclined plane, a relatively small angle α close to 65 ° should be given so that rigid sheets or envelopes can be extracted; without this, these rigid flat materials would risk hooking onto the fixed inclined plane 31. With such a relatively small angle α, thin and not very rigid sheets can no longer be introduced one by one, since the underlying sheets will no longer be sufficiently retained and will be at least partially entrained with the upper sheet.

Au contraire avec un angle α plus grand par exemple de 80°, les feuilles minces sous-jacentes seront suffisamment retenues, par contre les feuilles rigides ne pourront plus être suffisamment courbées et resteront de ce fait crochées sur le plan faiblement incliné. Grâce au plan incliné à orientation variable constitué par les lames ressorts 35 ces inconvénients sont éliminés.On the contrary with an angle α greater for example of 80 °, the underlying thin sheets will be sufficiently retained, on the other hand the rigid sheets will no longer be able to be sufficiently curved and will therefore remain hooked on the slightly inclined plane. Thanks to the inclined plane with variable orientation constituted by the leaf springs 35 these drawbacks are eliminated.

En outre, du fait de l'élasticité des lames ressorts 35, la pente ou l'angle β adéquat est automatiquement ajusté par le matériau plat à introduire même, et ceci en fonction de sa rigidité.In addition, due to the elasticity of the spring blades 35, the suitable slope or angle β is automatically adjusted by the flat material to be introduced itself, and this as a function of its rigidity.

En référence aux figures 2 et 3, le dispositif d'introduction est en outre muni d'un organe de retenue additionnel 42. Ce dernier est constitué par un coin de retenue 43 destiné à coopérer avec un des coins du bord antérieur des feuilles. Ce coin de retenue 43 est solidaire d'un levier 44 articulé de façon pivotante sur la paroi latérale 10 grâce à un pivot 45. Un organe de crantage 46 permet de retenir le levier 44 dans deux positions déterminées par trois butées 47,48 et 49. Dans la position illustrée en traits pleins à la figure 3, le coin de retenue 43 se trouve en position active et sert d'organe de retenue additionnel pour des feuilles minces et peu rigides. Dans la position représentée en traits interrompus à la figure 3, le coin de retenue 43 est escamoté. Cette position est utilisée pour des matériaux rigides ou épais, telles que des enveloppes. Le dispositif pourrait bien entendu également fonctionner à satisfaction sans l'organe de retenue additionnel 42, mais ce dernier constitue un élément additionnel de sûreté rendant le dispositif particulièrement fiable même avec des feuilles très fines.Referring to Figures 2 and 3, the introduction device is further provided with an additional retaining member 42. The latter is constituted by a retaining corner 43 intended to cooperate with one of the corners of the front edge of the sheets. This retaining corner 43 is integral with a lever 44 pivotally articulated on the side wall 10 by means of a pivot 45. A notching member 46 makes it possible to retain the lever 44 in two positions determined by three stops 47, 48 and 49 In the position illustrated in solid lines in FIG. 3, the retaining corner 43 is in the active position and serves as an additional retaining member for thin and not very rigid sheets. In the position shown in broken lines in Figure 3, the retaining wedge 43 is retracted. This position is used for rigid or thick materials, such as envelopes. The device could of course also function satisfactorily without the additional retaining member 42, but the latter constitutes an additional safety element making the device particularly reliable even with very thin sheets.

Avantageusement les surfaces supérieures du plan incliné fixe 31, du prolongement 30 et éventuellement des lames ressorts 35 pourront être recouvertes d'une couche de substance modifiant le coefficient de frottement, telle qu'une mince couche de tétrafluoréthylène. Cette couche sert alors plus particulièrement à effacer les fines inégalités et aspérités de fabrication du dispositif.Advantageously, the upper surfaces of the fixed inclined plane 31, of the extension 30 and possibly of the leaf springs 35 may be covered with a layer of substance modifying the coefficient of friction, such as a thin layer of tetrafluoroethylene. This layer is then used more particularly to erase the fine unevenness and roughness of the device manufacturing.

La figure 5 représente une variante du dispositif dans laquelle des lames ressorts 35 sont remplacées par des leviers 50 montés pivotants grâce à un axe 51 sur la paroi 9 du magasin 6. Des ressorts 52 sollicitent les leviers 50 dans une position de repos, tel qu'illustrée à la figure 5, dans laquelle la surface supérieure d'appui 53 du levier fait un angle proche de 90° avec un plan parallèle au fond 8. Cette position correspond à une introduction de feuilles très peu rigides. Au contraire, lorsque des enveloppes rigides sont introduites, le levier 50 est basculé dans le sens contraire aux aiguilles d'une montre à la figure 5 de façon à être pratiquement escamoté à l'intérieur de l'ouverture 34 dans le prolongement 30. Les enveloppes coopèrent alors également avec le plan incliné fixe 31.FIG. 5 represents a variant of the device in which spring blades 35 are replaced by levers 50 pivotally mounted by means of an axis 51 on the wall 9 of the magazine 6. Springs 52 urge the levers 50 in a rest position, such that 'illustrated in Figure 5, wherein the upper bearing surface 53 of the lever makes an angle close to 90 ° with a plane parallel to the bottom 8. This position corresponds to an introduction of very slightly rigid sheets. On the contrary, when rigid envelopes are introduced, the lever 50 is tilted anti-clockwise in FIG. 5 so as to be practically retracted inside the opening 34 in the extension 30. The envelopes then also cooperate with the fixed inclined plane 31.

Selon une autre variante illustrée à la figure 6, l'organe de retenue pourra être formé par une seule pièce 60, levier ou plaquette, d'une largeur sensiblement égale à la largeur du dispositif d'introduction et monté de façon pivotante sur la paroi antérieure 9. Le mouvement de pivotement ou de basculement de cette pièce est délimité dans les deux sens par des butées 61,62 de façon que la surface supérieure d'appui à orientation variable de cette pièce 60 présente un angle β avec un plan parallèle au fond 8 variant entre sensiblement 90° et 60°. Un élément élastique, tel qu'un ressort 64, sollicite la pièce vers une position de repos contre la butée 61 dans laquelle l'angle β est sensiblement de 90°. Le prolongement 30 de la paroi antérieure 9 est supprimé dans cette variante.According to another variant illustrated in Figure 6, the retaining member may be formed by a single piece 60, lever or plate, of a substantially equal width to the width of the insertion device and pivotally mounted on the front wall 9. The pivoting or tilting movement of this part is delimited in both directions by stops 61, 62 so that the upper bearing surface with variable orientation of this part 60 has an angle β with a plane parallel to the bottom 8 varying between substantially 90 ° and 60 °. An elastic element, such as a spring 64, biases the part towards a rest position against the stop 61 in which the angle β is substantially 90 °. The extension 30 of the front wall 9 is eliminated in this variant.

Il est bien entendu que les modes de réalisation décrits ci-dessus ne présentent aucun caractère limitatif et qu'ils peuvent recevoir toutes modifications désirables à l'intérieur du cadre tel que défini par la revendication 1. En particulier, la position du magasin 6 pourra être différente, son fond 8 pourrait être incliné ou horizontal. La plaque de support 12 pourra être fixe, les galets d'entraînement seraient alors sollicités pendant une opération d'introduction élastiquement contre des feuilles à extraire. Le nombre de lames ressorts 35 pourra être différent de trois, par exemple quatre ou davantage. Au lieu de galets d'entraînement, on pourra également prévoir d'autres organes, tel qu'un cylindre de frappe ou des pattes d'entraînement. Au lieu que la pente du levier 50 (fig. 5) ou 60 (fig. 6) soit automatiquement ajustée grâce aux ressorts 52 ou 64, ces ressorts pourront être remplacés par un dispositif de réglage manuel ou autre permettant d'ajuster la partie de la surface supérieure d'appui de ce levier en fonction des feuilles ou des enveloppes à introduire. Le dispositif pourra également comporter un organe de retenue additionnel 42 comportant deux coins de retenue 43 escamotables.It is understood that the embodiments described above are in no way limiting and that they can receive any desirable modifications inside the frame as defined by claim 1. In particular, the position of the magazine 6 may be different, its bottom 8 could be inclined or horizontal. The support plate 12 may be fixed, the drive rollers would then be stressed during an insertion operation elastically against the sheets to be extracted. The number of leaf springs 35 may be different from three, for example four or more. Instead of drive rollers, it is also possible to provide other members, such as a striking cylinder or drive lugs. Instead of the slope of the lever 50 (fig. 5) or 60 (fig. 6) being automatically adjusted by means of the springs 52 or 64, these springs may be replaced by a manual or other adjustment device making it possible to adjust the part of the upper bearing surface of this lever according to the sheets or envelopes to introduce. The device may also include an additional retaining member 42 comprising two retractable retaining corners 43.

Claims (8)

Dispositif d'introduction de matériaux plats (14) à imprimer, telles que des feuilles de papier et/ou des enveloppes, pour imprimantes ou machines à écrire comprenant un magasin (6) à fond (8) sensiblement plan dans lequel une pile (14) desdits matériaux plats est disposée et duquel des matériaux sont extraits un à un et introduits dans l'imprimante (2), des galets d'entraînement (17) agencés sur un arbre d'entraînement (20) de façon à déplacer le matériau plat supérieur de la pile pour l'amener dans l'imprimante (2) ou la machine à écrire, le dispositif comprenant en outre au moins un organe de retenue (31,35,43,50,60) destiné à retenir les matériaux plats disposés dans ladite pile sous le matériau plat supérieur, caractérisé en ce que l'organe de retenue (40) comporte au moins une pièce mobile (35,50,60) montée de façon mobile sur le magasin (6) et présentant une surface supérieure (37) destinée à entrer en contact avec le bord antérieur desdits matériaux plats pour constituer une surface d'appui (37) à orientation variable pour lesdits matériaux plats, disposée en aval des galets d'entraînement (17), l'orientation de cette surface d'appui variable (37) par rapport audit fond (8) sensiblement plan étant réglée en fonction de la rigidité desdits matériaux plats à imprimer, l'angle β entre cette surface d'appui variable (37) et un plan parallèle audit fond (8) étant plus grand pour des matériaux peu rigides et plus faible pour des matériaux rigides.Device for introducing flat materials (14) to be printed, such as sheets of paper and / or envelopes, for printers or typewriters comprising a magazine (6) with substantially flat bottom (8) in which a stack (14 ) of said flat materials is arranged and from which materials are extracted one by one and introduced into the printer (2), drive rollers (17) arranged on a drive shaft (20) so as to move the flat material top of the stack to bring it into the printer (2) or the typewriter, the device further comprising at least one retaining member (31,35,43,50,60) for retaining the flat materials arranged in said stack under the upper flat material, characterized in that the retaining member (40) comprises at least one movable part (35,50,60) mounted movably on the magazine (6) and having an upper surface ( 37) intended to come into contact with the front edge of said mat flat sides to form a variable orientation support surface (37) for said flat materials, disposed downstream of the drive rollers (17), the orientation of this variable support surface (37) relative to said bottom ( 8) substantially plane being adjusted as a function of the rigidity of said flat materials to be printed, the angle β between this variable bearing surface (37) and a plane parallel to said bottom (8) being greater for less rigid materials and more weak for materials rigid. Dispositif selon la revendication 1, caractérisé en ce que l'organe de retenue (40) comprend en outre un plan incliné fixe (31) faisant un angle prédéterminé (α) avec un plan parallèle audit fond (8), des pièces mobiles (35,50) étant sollicitées élastiquement vers une position de repos, dans laquelle leur surface d'appui variable (37) fait un angle (β) avec un plan parallèle audit fond (8) supérieur audit angle prédéterminé (α) du plan incliné fixe, les pièces mobiles (35,50) étant orientées par le matériau plat lors de son introduction de façon que l'angle (β) de la surface d'appui variable (37) avec le plan parallèle au dit fond diminue en fonction de l'augmentation de la rigidité du matériau plat à introduire.Device according to claim 1, characterized in that the retaining member (40) further comprises a fixed inclined plane (31) making a predetermined angle (α) with a plane parallel to said bottom (8), moving parts (35 , 50) being urged elastically towards a rest position, in which their variable bearing surface (37) forms an angle (β) with a plane parallel to said bottom (8) greater than said predetermined angle (α) of the fixed inclined plane, the moving parts (35.50) being oriented by the flat material when it is introduced so that the angle (β) of the variable bearing surface (37) with the plane parallel to said bottom decreases as a function of the increased rigidity of the flat material to be introduced. Dispositif selon la revendication 2, caractérisé en ce que le magasin (6) comprend une paroi antérieure (9) sensiblement perpendiculaire audit fond (8), le plan incliné fixe (31) prolongeant cette paroi antérieure (9) et l'angle prédéterminé (α) de ce plan incliné fixe (31) est compris entre 30° et 85°, de préférence entre 60°et 65°, la pièce mobile (35,50,60) étant montée sur cette paroi antérieure (9) et l'angle (β) entre sa surface d'appui variable (37) et un plan parallèle audit fond (8) étant dans la position de repos sensiblement égal à 90° et variant dans la position de travail entre 90° et 30°, de préférence entre 90° et 60°.Device according to claim 2, characterized in that the magazine (6) comprises a front wall (9) substantially perpendicular to said bottom (8), the fixed inclined plane (31) extending this front wall (9) and the predetermined angle ( α) of this fixed inclined plane (31) is between 30 ° and 85 °, preferably between 60 ° and 65 °, the movable part (35,50,60) being mounted on this anterior wall (9) and the angle (β) between its variable bearing surface (37) and a plane parallel to said bottom (8) being in the rest position substantially equal to 90 ° and varying in the working position between 90 ° and 30 °, preferably between 90 ° and 60 °. Dispositif selon la revendication 2 ou 3, caractérisé en ce qu'il comprend au moins deux pièces mobiles constituées par des lames ressorts (35) fixées par une de leur extrémité sur le magasin (6).Device according to claim 2 or 3, characterized in that it comprises at least two moving parts constituted by leaf springs (35) fixed by one of their ends to the magazine (6). Dispositif selon la revendication 2 ou 3, caractérisé en ce qu'il comprend au moins deux pièces mobiles constituées par des leviers (50) montés pivotants sur le magasin (6) et sollicités élastiquement vers une position de repos dans laquelle la surface d'appui variable des leviers (50) fait un angle β avec un plan parallèle audit fond (8) qui est plus grand que celui (α) du plan incliné fixe (31).Device according to claim 2 or 3, characterized in that it comprises at least two moving parts constituted by levers (50) pivotally mounted on the magazine (6) and resiliently biased towards a rest position in which the bearing surface variable levers (50) makes an angle β with a plane parallel to said bottom (8) which is larger than that (α) of the fixed inclined plane (31). Dispositif selon la revendication 4 ou 5, caractérisé en ce que les pièces mobiles (35,50) sont au moins partiellement engagées dans des ouvertures (34) du plan incliné fixe (31).Device according to claim 4 or 5, characterized in that the moving parts (35.50) are at least partially engaged in openings (34) of the fixed inclined plane (31). Dispositif selon la revendication 1, caractérisé en ce que l'organe de retenue est constitué par une seule pièce mobile (60) montée pivotante sur le magasin (6) et comprend deux butées (61,62) délimitant le mouvement de pivotement de la pièce mobile (60) et un organe élastique (64) sollicitant la pièce mobile (60) vers une position de repos déterminée par l'une des butées (61), position dans laquelle l'angle entre la surface d'appui variable de cette pièce mobile et un plan parallèle audit fond (8) est maximum.Device according to claim 1, characterized in that the retaining member consists of a single movable part (60) pivotally mounted on the magazine (6) and comprises two stops (61,62) delimiting the pivoting movement of the part mobile (60) and an elastic member (64) urging the mobile part (60) towards a rest position determined by one of the stops (61), position in which the angle between the variable bearing surface of this part mobile and a plane parallel to said bottom (8) is maximum. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la surface supérieure du plan incliné fixe (31) et/ou de ladite pièce mobile (35,50,60) est recouverte d'une couche de substance modifiant le coefficient de frottement.Device according to one of the preceding claims, characterized in that the upper surface of the fixed inclined plane (31) and / or of said moving part (35,50,60) is covered with a layer of substance modifying the coefficient of friction .
EP94118175A 1994-03-07 1994-11-18 Device for feeding sheets or envelopes which are to be printed Expired - Lifetime EP0672601B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00682/94A CH689671A5 (en) 1994-03-07 1994-03-07 Sheet feeding device or envelopes to be printed.
CH682/94 1994-03-07

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EP0672601A1 true EP0672601A1 (en) 1995-09-20
EP0672601B1 EP0672601B1 (en) 1998-02-25

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EP (1) EP0672601B1 (en)
JP (1) JP3468600B2 (en)
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DE (1) DE69408659T2 (en)

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EP0734875A2 (en) * 1995-03-30 1996-10-02 Canon Kabushiki Kaisha Sheet supplying apparatus
EP0786426A1 (en) * 1996-01-25 1997-07-30 Canon Kabushiki Kaisha Sheet supplying apparatus
EP0781720A3 (en) * 1995-12-26 1998-05-27 Brother Kogyo Kabushiki Kaisha Sheet feeder having improved sheet separation regardless of rigidity and size of sheet
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EP0694491A2 (en) * 1994-07-29 1996-01-31 Canon Kabushiki Kaisha Sheet supply apparatus
EP0694491A3 (en) * 1994-07-29 1997-01-29 Canon Kk Sheet supply apparatus
US6045220A (en) * 1994-07-29 2000-04-04 Canon Kabushiki Kaisha Sheet supply apparatus
US5992993A (en) * 1994-07-29 1999-11-30 Canon Kabushiki Kaisha Sheet supply apparatus
EP0694490A2 (en) 1994-07-29 1996-01-31 Canon Kabushiki Kaisha Sheet supply apparatus
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EP0734875A2 (en) * 1995-03-30 1996-10-02 Canon Kabushiki Kaisha Sheet supplying apparatus
US6305682B1 (en) 1995-03-30 2001-10-23 Canon Kabushiki Kaisha Sheet supplying apparatus
EP0734875A3 (en) * 1995-03-30 1998-08-26 Canon Kabushiki Kaisha Sheet supplying apparatus
US5857671A (en) * 1995-12-26 1999-01-12 Brother Kogyo Kabushiki Kaisha Sheet feeder having improved sheet separation regardless of rigidity and size of sheet
EP0781720A3 (en) * 1995-12-26 1998-05-27 Brother Kogyo Kabushiki Kaisha Sheet feeder having improved sheet separation regardless of rigidity and size of sheet
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EP0786426A1 (en) * 1996-01-25 1997-07-30 Canon Kabushiki Kaisha Sheet supplying apparatus
EP0885825A3 (en) * 1997-06-20 1999-09-15 Lexmark International, Inc. Sheet separator
EP0885825A2 (en) * 1997-06-20 1998-12-23 Lexmark International, Inc. Sheet separator
EP1125873A1 (en) * 1997-06-20 2001-08-22 Lexmark International, Inc. Sheet separator
US6712351B2 (en) 2001-05-03 2004-03-30 Benq Corporation Sheet feeding apparatus
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Also Published As

Publication number Publication date
US5527029A (en) 1996-06-18
DE69408659D1 (en) 1998-04-02
DE69408659T2 (en) 1998-10-01
JP3468600B2 (en) 2003-11-17
JPH07247033A (en) 1995-09-26
CH689671A5 (en) 1999-08-13
EP0672601B1 (en) 1998-02-25

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