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EP0037901B1 - Couvercle pour la surface du jet d'une tête à écrire à encre - Google Patents

Couvercle pour la surface du jet d'une tête à écrire à encre Download PDF

Info

Publication number
EP0037901B1
EP0037901B1 EP81101695A EP81101695A EP0037901B1 EP 0037901 B1 EP0037901 B1 EP 0037901B1 EP 81101695 A EP81101695 A EP 81101695A EP 81101695 A EP81101695 A EP 81101695A EP 0037901 B1 EP0037901 B1 EP 0037901B1
Authority
EP
European Patent Office
Prior art keywords
shaft
covering
rotation
nozzle surface
sliding plate
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
EP81101695A
Other languages
German (de)
English (en)
Other versions
EP0037901A1 (fr
Inventor
Fred Johannsen
Manfred Herbst
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.)
Olympia AG
Original Assignee
Olympia Werke AG
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 Olympia Werke AG filed Critical Olympia Werke AG
Publication of EP0037901A1 publication Critical patent/EP0037901A1/fr
Application granted granted Critical
Publication of EP0037901B1 publication Critical patent/EP0037901B1/fr
Expired 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16505—Caps, spittoons or covers for cleaning or preventing drying out
    • B41J2/16508—Caps, spittoons or covers for cleaning or preventing drying out connected with the printer frame
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • B41J2002/1655—Cleaning of print head nozzles using wiping constructions with wiping surface parallel with nozzle plate and mounted on reels, e.g. cleaning ribbon cassettes

Definitions

  • the invention relates to a covering device for a nozzle surface on an ink writing head of the type specified in the preambles of claims 1 and 5.
  • all systems of the ink writing head are energized after a predetermined number of written characters in order to drive ink from all nozzle systems and in particular also from those nozzles which are used to represent excess and short lengths, which are very rare in relation to the nozzles which often excite characters be excited.
  • Another measure to maintain the functions of the nozzle systems can be to increase the pressure in the ink supply, so as to cause an increased ink output. These functions are usually carried out in a marginal position, i.e. outside the actual writing area and the ink writing head is to be moved into this.
  • DE-PS 2519160 describes a device for covering the nozzle openings on an ink writing head with a cushion that can be placed against the nozzle openings during non-writing times.
  • the pillow is deformable.
  • the ink writing head is placed with its nozzle surface under slight pressure against the cushion, which is carried along the width of the nozzle surface in the direction of the movement of the ink writing head.
  • the cushion can have a rotationally symmetrical shape and be rotatably mounted on an axis in a housing. The pillow is soaked and this and the wiping movement caused by the rotational movement between the nozzle surface and the pad leads to disturbances at the nozzle openings.
  • DE-OS 2 746 617 describes a device for covering the nozzle surface on an ink writing head in non-writing times with an adjusting device for the installation of a masking tape inserted in a cassette on the nozzle surface. With this device, a new covering area is led into the head area between two systems.
  • the masking tape is placed in front of the nozzle surface by first guiding a locking fork oriented on a rocker against the ink writing head and catching it, and then gripping a pad attached to the rocker behind the masking tape and holding it against it the nozzle surface lays.
  • the masking tape must be lifted off the nozzle surface when the ink writing head is moved to the edge position.
  • the rocker with the pad and the locking fork is brought out of engagement with the ink writing head.
  • the indexing movement of the masking tape takes place under spring action, the lifting movement of the locking fork and cushion and the winding of this spring by an electromagnet.
  • the new areas of covering material moving in front of the nozzle surface are of different lengths as a result of a growing winding diameter and this leads to an increased consumption of covering material.
  • the locking fork and the rocker with the pad are guided undamped against the ink writing head and its nozzle surface, so that the nozzle systems are severely disrupted and their functions can fail.
  • the object of the invention is to provide a device for covering the nozzle surface on an ink writing head, which is simplified in structure, but with which the covering movements and the tape feed movement can nevertheless be carried out as movements which are independent of one another.
  • cassette-covered masking tapes can be used, and also those with a pretensioning tape. This can be wound away by controlling the motor without additional funds must be removed.
  • a masking tape with the new area to be placed in front of the nozzle area can be brought (simultaneously) in a preliminary process into the area of the nozzle area of the ink writing head which is guided into the edge position, while the ink writing head is in the writing area for performing writing functions .
  • the forces to be exerted for the covering for the frictional moments in the cassette are separated from the forces for the covering band to rest on the nozzle surface.
  • Another advantage is the possibility of using multi-tape cartridges and here such cartridges with a cover tape or a cover roller and a cleaning tape.
  • the cover device shown in FIG. 1 for the nozzle surface on an ink writing head, which has not been shown, is fastened to a frame plate 1 of an ink writing mechanism.
  • a bearing bracket is positioned at 2 for carrying the elements of the covering device.
  • a motor 4 is also shown, which is screwed to the bearing bracket via the motor mounting plate 3 and by means of the screw means 5.
  • the motor 4 can be, for example, a pulse or DC motor that is reversible in its direction of rotation. This is controlled via connections 8 for clockwise or counterclockwise rotation.
  • a gear mechanism can also be incorporated to reduce the rotational speed of the motor to the protruding shaft 6.
  • the shaft 6 carries adjustment means which consist of a first cam 9, a second cam 10 and the one drawn from the shaft in the drawing Cam 11 exist. These cams 9, 10 and 11 have different running surfaces 16, 17 and 18.
  • the cams 9 and 10 are rigidly connected to one another.
  • the cam 11 can be locked by means of locking teeth, arrow 42 on the cylindrical extension 41 in a groove 20 in the adjusting means or in a coupling 19.
  • the clutch 19 is firmly connected to the cams 9 and 10.
  • This can consist, for example, of an electromagnetically adjustable disengaging clutch, which would thus be controllable, or of a one-way clutch, so that the adjusting means, cams 9 and 10 are taken along by the shaft 6 in the direction of the arrow 12 shown when the shaft 6 rotates.
  • the bearing bracket 2 has an angled guide rail 26 for the displaceable mounting of a first slide plate 21 and a second slide plate 29. Both slide plates 21 and 29 are displaceable in the holes and via running disks 27 and 38 by means of screw means 39 on the angled guide rail 26 in the direction of the double arrows 23 and 35 attached.
  • the slide plate 21 has an angled contact surface 25 for contact with the running surface 17 of the cam 10.
  • the spring 24, shown as not visible, holds the slide plate 21 over the angled contact surface 25 on the running surface 17, the slide plate 21 being more or less in accordance with the predetermined curve shape is fed less far in the direction of the double arrow 23 and thus onto an ink writing head guided into the edge position 32.
  • the slide plate 21 has an opening 28 for the passage of the shaft 6 upwards and a contact surface 37 to be described on the slide plate 29.
  • a left pad 30 and a right pad 31 are fixed, the meaning of which is still to be described.
  • the spring 36 engages on the slide plate 29 in such a way that the already mentioned and angled contact surface 37 is always held in contact with the running surface 16 of the cam 9.
  • the opening 40 serves for the passage of the shaft 6 and the cylindrical extension 41 of the cam 11 placed thereon.
  • a support plate 46 is fastened to the bearing bracket 2 with a bend 54 and a resilient hold-down device 55.
  • a cassette 45 is placed on the support plate 46, which is held in a predetermined position between the bend 54 and a pin 56 and by the resilient hold-down device 55 becomes.
  • the cassette 45 essentially contains a cover tape 50 and optionally a cleaning tape 53 for contacting the ink writing head.
  • These ribbons are guided via deflection means into a front area opposite the ink writing head.
  • the cartridge has windows for accessing the ribbons and for placing them on the nozzle surface of the ink writing head.
  • a deflection element, roller 52 has been shown, which carries a clock disk 51 in its lower part. A supply roll and an empty roll for the length of tape used are not shown.
  • Both tapes can be unwound from one reel and wound onto the other reel.
  • the core of the empty spool is symbolically indicated here at 49 and is in connection with the driving mandrel 47 when the cassette is attached, its ribs in corresponding receiving openings or lock the ribs in the winding core to drive the empty winding.
  • a loadable clutch or a one-way clutch is likewise introduced into a cylindrical projection 44 of the driving mandrel 47, so that the driving mandrel 47 can be driven by the shaft 6 in only one direction according to the arrow 48.
  • the cylindrical extension 44 is in the assembled state of the device in the bore 43 of the cam 11 without any effect on it.
  • the pads 30 and 31 engage through openings in the bottom of the cassette 45 behind the tapes 50 and 53, which are then guided when the slide plate 29 is moved in the direction of the double arrow 35 against the ink writing head and its nozzle surface which have been moved to the edge position 32 or 33 .
  • the coupling 19 and that in the cylindrical extension 44 separate the running directions of the cams 9, 10 and 11 and the driving mandrel 47 in accordance with the predetermined direction of the arrows 12 and 48. It goes without saying that for this the motor 4 must be reversible or not shown in detail Such a measure is to be provided in the transmission to reverse the rotary movement of the shaft 6 in accordance with the double arrow 7
  • FIG. 2 shows the control structure for the motor, the cam 11 and the timing disk 51 having been taken from FIG. 1.
  • the roller 52 and the cover band 50 guided on it are shown in order to indicate the synchronous operation between the cover band 50 and the clock disk 51.
  • Switching element which can consist of a light-emitting diode 57 and a photo transistor 58.
  • the signals in the phototransistor 58 derived from the clock disk are processed in an amplifier 59 and the voltage discriminator 60 in a known manner and fed to a microprocessor 61.
  • the running surfaces 16 and 17 of the cams 9 and 10 are designed in such a way that when the motor shaft 6 rotates in the direction of the arrow 12, the slide plate 21 with the locking means 22 is guided against the ink writing head moved into the edge position 32 and locks it in this position and in time then displaces the slide plate 29 with the cushion 30 at the angled end 34 with the interposition of the cover tape 50 stored in the cassette 45 being guided against the nozzle surface of the ink writing head.
  • the cam 11 is designed in its tread 18, for example in the form shown in FIG., So that a different signal is present at the microprocessor 61 for the advanced positions of the slide plates 21 and 29 and for the positions withdrawn from the ink writing head.
  • the slide plates 21 and 29 are lifted off from the nozzle surface or from the ink writing head essentially simultaneously, in accordance with the design of the running surfaces 16 and 17 of the cams 9 and 10.
  • the pulse lengths via the clock disk 51 on the phototransistor 58 enable a uniform tape transport of the cover material 50. If a new area of the cover material 50 in a cover cassette and new cover areas of a cover tape 50 and a cleaning tape 53 are transported into the area of the window openings, the motor shaft 6 can be acted upon of the motor are rotated in accordance with arrow 12 to perform a simultaneous capping function, although the ink writing head has not been guided in the first or second edge positions 32, 33.
  • the pre-embossed or pre-shaped tape areas do not disturb the entry of the ink-writing head into one or the other edge position, but do bring about an exact, closely tolerable contact pressure of the masking tape on the nozzle surface, since the contact pressure is not reduced by the frictional forces of the supply roll and the tape guides.

Landscapes

  • Ink Jet (AREA)
  • Common Mechanisms (AREA)

Claims (5)

1. Dispositif de recouvrement de la surface d'imprégnation d'une tête d'écriture encrée occupant une position marginale, à l'aide d'un moyen de recouvrement dont une nouvelle région de surface de recouvrement peut être amenée par rotation en regard de la surface d'imprégnation et peut être appliquée contre cette surface d'imprégnation par l'intermédiaire d'un moyen d'ajustement, ce dispositif comportant une source de force motrice pour assurer la rotation et le mouvement dudit moyen d'ajustement, dispositif caractérisé par le fait que le moyen (47) permettant le mouvement de la substance de recouvrement (50) par rotation (flèche 48) et le moyen d'ajustement (cames 9,10,11) sont agencés de façon à pouvoir être accouplés sélectivement, par l'intermédiaire d'un élément respectif d'accouplement commandable, avec un arbre commun (6) entraîne sélectivement vers la gauche ou vers la droite par ladite source (4) de force motrice.
2. Dispositif selon la revendication 1, caractérisé par le fait que les éléments d'accouplement entre le moyen (47) assurant la rotation (flèche 48) et l'arbre (6), ainsi qu'entre le moyen d'ajustement (cames 9, 10, 11) et ledit arbre (6) consistent en des accouplements à roue libre (44, 19) qui assurent un entraînement ou une libération dans des sens mutuellement opposés.
3. Dispositif selon la revendication 1 ou 2, comportant une plaque coulissante pouvant être, grâce au moyen d'ajustement et à l'encontre de l'action d'un ressort, déplacée en direction de la tête d'écriture encrée avancée, dispositif caractérisé par le fait que le moyen d'ajustement englobe trois cames (9, 10, 11) calées sur l'arbre, parmi lesquelles une première came (9) est en liaison efficace avec une première plaque coulissante (21), une deuxième came (10) est en liaison efficace avec une seconde plaque coulissante (29) et une troisième came (11) est en liaison efficace avec un élément de commutation (62); par le fait que la première plaque coulissante (21) est munie d'une fourche d'arrêt (22) connue en soi, qui s'engage dans la région de la tête d'écriture encrée avancée; par le fait que la seconde plaque coulissante (29) est pourvue d'une pièce extrême (34) rembourrée d'une manière connue en soi, qui peut être appliquée contre la surface d'imprégnation de ladite tête d'écriture encrée; et par le fait que les cames (9,10,11 ) sont agencées de telle façon que, lors de la rotation (flèche 12) de l'arbre (6), tout d'abord la première plaque coulissante (21), puis la seconde plaque coulissante (29) soient déplacées en direction de la tête d'écriture encrée (doubles flèches 23, 35), et soient soulevées pour l'essentiel simultanément dans la direction opposée à l'écart de ladite tête, et que l'interrupteur (62) puisse être amené à différentes positions de commutation lorsque lesdites plaques coulissantes (21, 29) occupent la position avancée en direction de la tête d'écriture encrée et/ou la position reculée à l'écart de cette tête d'écriture.
4. Dispositif selon la revendication 2 ou 3, caractérisé par le fait que, en vue du mouvement de la substance de recouvrement (50) par la rotation (48) de l'arbre (6), cet arbre (6) est doté à l'une de ses extrémités d'un mandrin d'entraînement (47); et par le fait que ledit mandrin d'entraînement (47) est en liaison efficace avec ledit arbre (6) par l'intermédiaire d'un accouplement à roue libre (44).
5. Dispositif de recouvrement de la surface d'imprégnation d'une tête d'écriture encrée occupant une position marginale, comportant une substance de recouvrement dont une nouvelle région de surface de recouvrement peut être amenée par rotation en regard de ladite surface d'imprégnation et être appliquée contre cette surface d'imprégnation grâce à un moyen d'ajustement, ce dispositif comportant en outre une source de force motrice assurant la rotation et le mouvement dudit moyen d'ajustement, dispositif caractérisé par un moyen (par exemple moteur 4) pour assurer sélectivement la marche de l'arbre (6) vers la gauche ou vers la droite; un jeu de cames (9, 10, 11) calées sur ledit arbre (6) et en prise avec une première plaque coulissante (21) afin de bloquer ladite tête d'écriture encrée dans la position marginale (32), avec une seconde plaque coulissante (29) pour assurer le recouvrement de ladite surface d'imprégnation, et avec un premier interrupteur (62) pour commander les mouvements de blocage et de recouvrement (23, 35), des trains d'impulsions provenant de cet interrupteur étant alors comptés; ainsi qu'un autre élément de commutation (57, 58) situé au voisinage de la matière de recouvrement (50) en circulation, afin de saisir un train d'impulsions permettant la commande d'un acheminement uniforme de la bande de cette matière de recouvrement (50).
EP81101695A 1980-04-16 1981-03-07 Couvercle pour la surface du jet d'une tête à écrire à encre Expired EP0037901B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3014526 1980-04-16
DE19803014526 DE3014526A1 (de) 1980-04-16 1980-04-16 Abdeckeinrichtung fuer die duesenflaeche an einem tintenschreibkopf

Publications (2)

Publication Number Publication Date
EP0037901A1 EP0037901A1 (fr) 1981-10-21
EP0037901B1 true EP0037901B1 (fr) 1984-10-24

Family

ID=6100127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101695A Expired EP0037901B1 (fr) 1980-04-16 1981-03-07 Couvercle pour la surface du jet d'une tête à écrire à encre

Country Status (2)

Country Link
EP (1) EP0037901B1 (fr)
DE (2) DE3014526A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107599633A (zh) * 2017-11-02 2018-01-19 深圳华云科技实业有限公司 兼容多平台的喷码设备、系统及喷码方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3117707B2 (ja) * 1988-11-22 2000-12-18 協和醗酵工業株式会社 ５´―イノシン酸の製造法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107599633A (zh) * 2017-11-02 2018-01-19 深圳华云科技实业有限公司 兼容多平台的喷码设备、系统及喷码方法
CN107599633B (zh) * 2017-11-02 2019-11-12 深圳华云数码有限公司 可兼容于多种平台的喷码设备、系统及喷码方法

Also Published As

Publication number Publication date
DE3014526A1 (de) 1981-10-22
EP0037901A1 (fr) 1981-10-21
DE3166768D1 (en) 1984-11-29

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