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EP1161346B1 - Printing device with means for conveying paper - Google Patents

Printing device with means for conveying paper Download PDF

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Publication number
EP1161346B1
EP1161346B1 EP00920377A EP00920377A EP1161346B1 EP 1161346 B1 EP1161346 B1 EP 1161346B1 EP 00920377 A EP00920377 A EP 00920377A EP 00920377 A EP00920377 A EP 00920377A EP 1161346 B1 EP1161346 B1 EP 1161346B1
Authority
EP
European Patent Office
Prior art keywords
printing
print
pair
printing device
recording medium
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 - Lifetime
Application number
EP00920377A
Other languages
German (de)
French (fr)
Other versions
EP1161346A1 (en
Inventor
Günter Baitz
Wilfried Dobring
Wolfgang Malke
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.)
Wincor Nixdorf International GmbH
Original Assignee
Wincor Nixdorf International GmbH
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 Wincor Nixdorf International GmbH filed Critical Wincor Nixdorf International GmbH
Publication of EP1161346A1 publication Critical patent/EP1161346A1/en
Application granted granted Critical
Publication of EP1161346B1 publication Critical patent/EP1161346B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices 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
    • B41J11/02Platens
    • B41J11/08Bar or like line-size platens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices 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
    • B41J15/04Supporting, feeding, or guiding devices; Mountings for web rolls or spindles

Definitions

  • the invention relates to a printing device according to the preamble of claim 1.
  • a printing device of the type mentioned is from DE 23 09 684 A1 known.
  • the electrode comb and a holder for a recording medium supply roll are in the Lower part and a transport device designed as a pressure roller for a record carrier in the upper part arranged.
  • the electrode comb is spatial to the pressure roller assigned, the individual electrodes against the pressure roller are sprung.
  • the pressure roller thus forms Platen and in cooperation with the electrodes a record carrier transport device.
  • the top has two side walls, one inserted into the receptacle Enclose the recording medium supply roll on the side.
  • the known arrangement has the advantage that a record carrier supply roll is particularly easy to insert.
  • the arrangement may also be well suited for a printing device be the one as the printhead the record carrier only has a line-like electrode comb. Should but one flat and at a distance from the record carrier opposite printhead are used, so this is Arrangement cannot be used.
  • WO 91 13765 A1 describes a printer which also a lower part and on this around a pivot axis includes pivotally mounted upper part.
  • a printhead is in the lower part and a pressure bar as well as a holder for a recording medium supply roll in the upper part arranged.
  • As a transport device for a record carrier two pairs of transport rollers are provided, one of which is in the direction of transport of the record carrier seen, located in front of the pressure bar and at the same time driven with a second pair of transport rollers is located behind the pressure bar.
  • a disadvantage is believed to be due to the location of the media stock roll in the upper part of the record carrier through a slot and around the front of the Upper transport roller and the pressure bar must be led around. Replacing one Record carrier supply roll is thus developed difficult and time consuming.
  • the object of the invention is therefore a printing device of the type mentioned that a printhead can be used, the recording medium at a distance faces and at least its pressure elements extend across the width of a print line.
  • the task is for a printing device according to the preamble of claim 1 by the characterizing features of claim 1 solved.
  • the pressure counter bearing is in the printing area character or movable in print line direction column-specific printhead flat, includes the transport device one aligned parallel to the print area pair of transport rollers driven by a motor and one Tightening device for the recording medium and in Print line direction seen is next to the print area Parking area for the print head arranged.
  • the platen can for a non-contact printhead as a simple one Support plate, but must be used when using a stop print head be designed as a pressure bar.
  • a pressure bar one described below Combination of one on one side of the Pressure roller arranged pair of transport rollers and one tightening device arranged on the other side ensures that the recording medium in the area of Platen is always taut.
  • the print head is preferably one in the print line direction Ink printhead movable parallel to the platen, one or more print lines at the same time can print.
  • a good one Tension of the record carrier in the area of the platen achieved in that a pair of transport rollers, in Direction of transport of the record carrier seen, behind the platen and one made of a material with high Friction coefficient formed recording medium brake before Platen is arranged.
  • the first pair of transport rollers pulls the one held back by the recording medium brake Record carrier on the platen past.
  • the record carrier brake can be made from one elastic compressible plastic strips with high coefficient of friction exist, which is supported on the platen.
  • the tension of the record carrier in the area of the platen achieved in that a first pair of transport rollers, seen in the direction of transport of the record carrier, in front of the platen and at the same time as the first pair of transport rollers driven second pair of transport rollers is arranged behind the platen, whereby the second pair of feed rollers with a slight greater peripheral speed than the first pair of transport rollers is driven and a less than this Has coefficient of friction, so that the recording medium feed width determined by the first pair of transport rollers becomes.
  • the pair of transport rollers or the first and second pair of transport rollers from a bearing mounted in the upper part attacking on the back of the record carrier driven roller and a mounted in the lower part towards the driven roller with the force a spring loaded on the recording side of the Record carrier attacking free-running counter role educated.
  • the counter roles are from the record carrier when it is fed taken along, move with it without slipping With. This makes blurring of the print reliable avoided.
  • the arrangement of the pivot axis of the upper part on the same Height like a the first counter roller and the first driven one Rolling centerline or below of this ensures that when pivoting the upper part in its open position after swiping over one minimum swivel angle the pair of transport rollers and the tightening device is open, the record carrier is not taken along when swiveling.
  • the reverse order is also possible. It is essential that the two locking elements are complementary to each other.
  • a two-leg release lever is pivoted, one leg of which is intended to be attached to the at least a locking lever in the sense of unlocking the to attack complementary locking elements.
  • the at least one Locking lever can only be brought into the unlocked position, if the print head is in the parking area or in front of it acceleration range lying within the pressure range, i.e. outside of the print area. This is when replacing the record carrier stock roll the sensitive Mouthpiece of the printhead against unauthorized contact and the operator's hands are protected from contamination.
  • the printhead is to make the printer impossible additionally in the parking area or the acceleration area blocked when the top is outside the Pressure position.
  • a printing device is generally designated 10. It comprises a lower part 12 with side cheeks 13 and an upper part 14. The latter is about a pivot axis 16 held pivotably on the rear area of the lower part 12, as the arrow A shows.
  • an ink print head 18 On the lower part 12 is an ink print head 18 in the direction Movable perpendicular to the plane of the drawing on guide rails 19 stored, which is held in the side cheeks 13 are.
  • Below the ink print head 18 is one on one first shaft 20 freely rotatable first counter roller 22 of a first Pair of transport rollers 24 and above the ink print head 18 a freely rotatable on a second shaft 26 second counter roller 28 of a second pair of transport rollers 30 arranged.
  • the two ends of the are parallel to the direction of displacement of the ink print head 18 extending waves 20, 26 are from a pressure spring 32 and 34 (only a pressure spring can be seen) in the direction of Upper part 14 biased elastically.
  • the ink print head 18 opposite is in Area of the inkjet printhead 18 planar platen 36 attached.
  • Below the platen 36 is one first driven roller 38 of the first pair of transport rollers 24 and a second one above the ink print head 18 driven roller 40 of the second pair of transport rollers 30 arranged.
  • the first and second driven rollers 38, 40 are shared by two, arranged in the lower part 12 Drive motor, not shown, driven.
  • the second driven roller 40 has a slightly larger one Scope as the first driven roller 38.
  • That Platen 36 and the first and second driven Rollers 38, 40 are in two aligned parallel to each other Side walls 42 held, the platen 36 slightly in the direction of the print head 18 via the driven Rolls 38, 40 protrudes so that a record carrier 66 abuts this.
  • the pivot axis 16 the upper part 14 is at the same height as one first counter roller 22 and first driven roller 38 penetrating center line 25. It can also be below this lie.
  • a locking pin 44 is perpendicular to each side wall 42 to the outside.
  • Upper part 14 engages the locking pin 44 in a claw 46 which in a flank of a pivot pin 48 pivotable locking lever 50 is incorporated.
  • Above the Claw 46 tapers the locking lever 50 to an insertion bevel 52 for the locking pin 44.
  • the locking lever 50 is in Direction of its shown with solid lines Locking position with the force of a locking spring 54 acted upon.
  • a two-legged Release lever 56 around one of the side walls 42 vertically penetrating second pivot axis 57 pivotable stored.
  • the uprights of the release levers 56 are interconnected by a handle 58 connected so that the release lever assembly 56, 58th grips the upper part 14 in a U-shape.
  • the free leg 60 each locking lever 56 is with its solid Lines shown at rest on the flank of the Locking lever 50, into which the claw 46 is also incorporated is.
  • a recording medium supply roll 64 arranged in the lower part 12 of the printer 10 in the lower part 12 of the printer 10 in the lower part 12 of the printer 10 is between the side walls 42 of the upper part 14 and near the pivot axis 16 a upwardly open receiving trough 62 for a recording medium supply roll 64 arranged. That from the bottom the recording medium supply roll 64 end of the Record carrier 66 is from the bottom around the first and the second pair of transport rollers 24, 30 passed around.
  • unlocking lever 56 By adjusting the unlocking lever 56 in with Dashed lines shown unlocking position 56 'press their free legs 60 into their locking levers 50 unlocked position shown with dash-dotted lines 50 ', so that the upper part 14 in its in Fig. 2nd shown unfolded position can be pivoted.
  • the free legs 60 of the unlocking lever come here 56 out of engagement with the locking levers 50, which under the Power of the locking locks 54 in their original position to return.
  • the recording medium supply roll 64 in the receiving trough 62 inserted and the record carrier 66 on the driven rollers 38, 40 are placed.
  • the upper part 14 is folded down into that shown in FIG. 1 Positioned, the locking pins 44 slide along the lead-in chamfers 52 until they engage the claws 46 engage.
  • the record carrier 66 is in the drive roller pairs 24, 30 pinched. Will their drive motor briefly energized, the record carrier 66 is forward the platen 36 additionally tightened and the printer 10 is ready to print.
  • the top view in Fig. 3 shows that the area divided into three sections between the side walls 13 is: an acceleration area 68, a pressure area 70 and a parking area 72.
  • the platen 36 extends over the entire pressure range 70.
  • parking area adjoining the printing area 70 on the right a so-called docking station 74 is arranged, which a drying out of the ink print head 18 preventing Cover cap 76 and a wiper lip 78 includes.
  • the docking station 74 can also additionally have a suction device for cleaning the ink nozzles of the ink print head 18 include. Docking stations for ink printers are common known. A more detailed description of their structure and their Effectiveness is therefore superfluous.
  • the acceleration range 68 is required if in both directions of transport of the ink print head 18 and with a constant Print quality should be printed. If the ink print head 18 starts from the left side cheek 13 in FIG. 3, he already has his when entering the printing area 70 Target speed reached.
  • a first leg 80 projects inside the parking area 72 one with the force of a third pressure spring 86 in the direction of the upper part 14 acted blocking lever 82nd in the path of the ink print head 18.
  • a second Leg 84 of the blocking lever 82 engages behind the Right locking lever 50, so that it is blocked and the upper part 14 is not pivoted out of its pressure position can be.
  • the blocking position of the blocking lever 82 is shown in dash-dotted lines.
  • the ink printhead 18 but brought into its parking position shown in FIG. 3, he moves the blocking lever 82 to the right in its release position shown with solid lines, the right locking lever 50 is released and that Upper part 14 can be pivoted out of the pressure position.
  • a printhead locking lever 88 height-adjustable In the lower part 12 of the printer 10 is also a printhead locking lever 88 height-adjustable. This has one first leg 90, which is in the displacement of the ink print head 18 protrudes. A second leg 92 of the printhead lock lever 88 protrudes into the swivel path of the upper part 14 Printhead locking lever 88 is between one with its first Leg 90 in the path of the ink print head 18 protruding locking position (shown in dot-dash lines in FIG. 1) and a position releasing the displacement path (shown in Fig. 1 with solid lines) adjustable. He is in the direction of his locked position with the force a fourth pressure spring 94 biased.
  • the printhead lock lever 88 is for the displacement of the ink print head 18 arranged so that the latter in the park position can be held. As long as the top 14 is in its print position, the print head locking lever 88 held in its release position and the Ink printhead 18 can be moved as desired. Becomes the upper part 14 pivoted out of the printing position, moves printhead locking lever 88 driven by the fourth pressure spring 94 in its locked position.
  • the blocking lever 82 and the printhead locking lever 88 work together in such a way that on the one hand the upper part 14 only can be brought out of its printing position if itself the ink print head 18 is in the parking area 72, and that on the other hand, the ink print head 18 only from the parking area 72 can be moved when the upper part 14 in its Pressure position. This will make it more reliable Protection of the ink printhead 18 against accidental touch reached.

Landscapes

  • Ink Jet (AREA)
  • Common Mechanisms (AREA)
  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Advancing Webs (AREA)

Description

Die Erfindung betrifft eine Druckvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a printing device according to the preamble of claim 1.

Eine Druckvorrichtung der genannten Art ist aus der DE 23 09 684 A1 bekannt. Darin ist eine elektrographische Druckvorrichtung mit einem sich über die Druckzeilenbreite erstreckenden Elektrodenkamm beschrieben, welche ein Unterteil und ein an diesem um eine Schwenkachse schwenkbar gelagertes Oberteil umfaßt. Der Elektrodenkamm und eine Aufnahme für eine Aufzeichnungsträger-Vorratsrolle sind in dem Unterteil und eine als Druckwalze ausgebildete Transportvorrichtung für einen Aufzeichnungsträger in dem Oberteil angeordnet. Der Elektrodenkamm ist der Druckwalze räumlich zugeordnet, wobei die einzelnen Elektroden gegen die Druckwalze angefedert sind. Die Druckwalze bildet damit ein Druckgegenlager und in Zusammenwirkung mit den Elektroden eine Aufzeichnungsträger-Transportvorrichtung. Das Oberteil weist zwei Seitenwände auf, die eine in die Aufnahme eingelegte Aufzeichnungsträger-Vorratsrolle seitlich umschließen.A printing device of the type mentioned is from DE 23 09 684 A1 known. There is an electrographic in it Printing device with an over the printing line width extending electrode comb described, which is a lower part and a pivotally mounted thereon about a pivot axis Covered top. The electrode comb and a holder for a recording medium supply roll are in the Lower part and a transport device designed as a pressure roller for a record carrier in the upper part arranged. The electrode comb is spatial to the pressure roller assigned, the individual electrodes against the pressure roller are sprung. The pressure roller thus forms Platen and in cooperation with the electrodes a record carrier transport device. The top has two side walls, one inserted into the receptacle Enclose the recording medium supply roll on the side.

Die bekannte Anordnung hat den Vorteil, daß eine Aufzeichnungsträger-Vorratsrolle besonders einfach einzulegen ist. Die Anordnung mag auch gut für eine Druckvorrichtung geeignet sein, die als Druckkopf einen den Aufzeichnungsträger nur linienhaft berührenden Elektrodenkamm aufweist. Soll aber ein dem Aufzeichnungsträger flächig und mit Abstand gegenüberstehender Druckkopf eingesetzt werden, so ist diese Anordnung nicht verwendbar. The known arrangement has the advantage that a record carrier supply roll is particularly easy to insert. The arrangement may also be well suited for a printing device be the one as the printhead the record carrier only has a line-like electrode comb. Should but one flat and at a distance from the record carrier opposite printhead are used, so this is Arrangement cannot be used.

In der WO 91 13765 A1 ist ein Drucker beschrieben, welcher ebenfalls ein Unterteil und ein an diesem um eine Schwenkachse schwenkbar gelagertes Oberteil umfaßt. Ein Druckkopf ist in dem Unterteil und ein Druckbalken sowie eine Aufnahme für eine Aufzeichnungsträger-Vorratsrolle in dem Oberteil angeordnet. Als Transportvorrichtung für einen Aufzeichnungsträger sind zwei Transportrollenpaare vorgesehen, deren eines sich, in Transportrichtung des Aufzeichnungsträgers gesehen, vor dem Druckbalken befindet und zeitgleich mit einem zweiten Transportrollenpaar angetrieben wird, das hinter dem Druckbalken angeordnet ist. Als nachteilig wird angesehen, daß auf Grund der Anordnung der Aufzeichnungsträger-Vorratsrolle im Oberteil der Aufzeichnungsträger durch einen Schlitz hindurch und um die vor dem Druckbalken befindliche obere Transportrolle und den Druckbalken selbst herumgeführt werden muß. Das Auswechseln einer Aufzeichnungsträger-Vorratsrolle gestaltet sich also schwierig und zeitaufwendig.WO 91 13765 A1 describes a printer which also a lower part and on this around a pivot axis includes pivotally mounted upper part. A printhead is in the lower part and a pressure bar as well as a holder for a recording medium supply roll in the upper part arranged. As a transport device for a record carrier two pairs of transport rollers are provided, one of which is in the direction of transport of the record carrier seen, located in front of the pressure bar and at the same time driven with a second pair of transport rollers is located behind the pressure bar. As a disadvantage is believed to be due to the location of the media stock roll in the upper part of the record carrier through a slot and around the front of the Upper transport roller and the pressure bar must be led around. Replacing one Record carrier supply roll is thus developed difficult and time consuming.

Aufgabe der Erfindung ist es daher, eine Druckvorrichtung der genannten Art dahin fortzubilden, daß ein Druckkopf eingesetzt werden kann, der dem Aufzeichnungsträger mit Abstand gegenübersteht und dessen Druckelemente sich wenigstens über die Breite einer Druckzeile erstrecken.The object of the invention is therefore a printing device of the type mentioned that a printhead can be used, the recording medium at a distance faces and at least its pressure elements extend across the width of a print line.

Die Aufgabe wird für eine Druckvorrichtung nach dem Oberbegriff des Anspruchs 1 durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The task is for a printing device according to the preamble of claim 1 by the characterizing features of claim 1 solved.

Erfindungsgemäß ist das Druckgegenlager im Druckbereich eines in Druckzeilenrichtung verschieblichen zeichen- oder spaltenseiellen Druckkopfes planeben, umfaßt die Transporteinrichtung ein parallel zu dem Druckbereich ausgerichtetes durch einen Motor antreibbares Transportrollenpaar und eine Straffungseinrichtung für den Aufzeichnungträger und in Druckzeilenrichtung gesehen ist neben dem Druckbereich ein Parkbereich für den Druckkopf angeordnet.According to the invention, the pressure counter bearing is in the printing area character or movable in print line direction column-specific printhead flat, includes the transport device one aligned parallel to the print area pair of transport rollers driven by a motor and one Tightening device for the recording medium and in Print line direction seen is next to the print area Parking area for the print head arranged.

Durch die planebene Ausgestaltung des Druckgegenlagers wird sichergestellt, daß für alle Druckelemente der Abstand zum Aufzeichnungsträger gleich ist. Das Druckgegenlager kann bei einem berührungslos arbeitenden Druckkopf als einfaches Stützblech, muß aber bei Verwendung eines Anschlagdruckkopfes als Druckbalken ausgebildet sein. eine weiter unten beschriebene Kombination aus einem auf der einen Seite des Druckgegenlagers angeordneten Transportrollenpaar und einer auf der anderen Seite angeordneten Straffungseinrichtung sorgt dafür, daß der Aufzeichnungträger im Bereich des Druckgegenlagers stets straff gespannt ist.Due to the flat design of the platen ensures that the distance to the Record carrier is the same. The platen can for a non-contact printhead as a simple one Support plate, but must be used when using a stop print head be designed as a pressure bar. one described below Combination of one on one side of the Pressure roller arranged pair of transport rollers and one tightening device arranged on the other side ensures that the recording medium in the area of Platen is always taut.

Vorzugsweise ist der Druckkopf ein in Druckzeilenrichtung parallel zu dem Druckgegenlager verfahrbarer Tintendruckkopf, der eine oder auch mehrere Druckzeilen gleichzeitig bedrucken kann.The print head is preferably one in the print line direction Ink printhead movable parallel to the platen, one or more print lines at the same time can print.

Gemäß einer Weiterbildung der Erfindung wird eine gute Spannung des Aufzeichnungsträgers im Bereich des Druckgegenlagers dadurch erreicht, daß ein Transportrollenpaar, in Transportrichtung des Aufzeichnungsträgers gesehen, hinter dem Druckgegenlager und eine aus einem Material mit hohem Reibwert gebildete Aufzeichnungsträger-Bremse vor dem Druckgegenlager angeordnet ist. Das erste Transportrollenpaar zieht dabei den von der Aufzeichnungsträger-Bremse zurückgehaltenen Aufzeichnungsträger an dem Druckgegenlager vorbei. Die Aufzeichnungsträger-Bremse kann dabei aus einem elastisch kompressiblen Kunststoffstreifen mit hohem Reibwert bestehen, der sich an dem Druckgegenlager abstützt.According to a development of the invention, a good one Tension of the record carrier in the area of the platen achieved in that a pair of transport rollers, in Direction of transport of the record carrier seen, behind the platen and one made of a material with high Friction coefficient formed recording medium brake before Platen is arranged. The first pair of transport rollers pulls the one held back by the recording medium brake Record carrier on the platen past. The record carrier brake can be made from one elastic compressible plastic strips with high coefficient of friction exist, which is supported on the platen.

Gemäß einer alternativen Weiterbildung der Erfindung wird die Spannung des Aufzeichnungsträgers im Bereich des Druckgegenlagers dadurch erreicht, daß ein erstes Transportrollenpaar, in Transportrichtung des Aufzeichnungsträgers gesehen, vor dem Druckgegenlager und ein zeitgleich mit dem ersten Transportrollenpaar angetriebenes zweites Transportrollenpaar hinter dem Druckgegenlager angeordnet ist, wobei das zweite Transportrollenpaar mit einer geringfügig größeren Umfangsgeschwindigkeit als das erste Transportrollenpaar angetrieben wird und einen gegenüber diesem geringeren Reibwert hat, so daß die Aufzeichnungsträger-Vorschubweite von dem ersten Transportrollenpaar bestimmt wird.According to an alternative development of the invention the tension of the record carrier in the area of the platen achieved in that a first pair of transport rollers, seen in the direction of transport of the record carrier, in front of the platen and at the same time as the first pair of transport rollers driven second pair of transport rollers is arranged behind the platen, whereby the second pair of feed rollers with a slight greater peripheral speed than the first pair of transport rollers is driven and a less than this Has coefficient of friction, so that the recording medium feed width determined by the first pair of transport rollers becomes.

Entsprechend einer bevorzugten Ausprägung des Erfindungsgegenstandes ist das Transportrollenpaar oder auch das erste und zweite Transportrollenpaar aus einer im Oberteil gelagerten, an der Rückseite des Aufzeichnungsträgers angreifenden angetriebenen Rolle und einer im Unterteil gelagerten, in Richtung auf die angetriebene Rolle mit der Kraft einer Feder beaufschlagten, an der Auzeichnungsseite des Aufzeichnungsträgers angreifenden frei laufenden Gegenrolle gebildet. Dadurch, daß die angetriebenen Rollen an der Rückseite des Aufzeichnungsträgers angreifen, wird ein Verwischen des noch frischen Aufdrucks vermieden. Die Gegenrollen werden von dem Aufzeichnungsträger bei dessen Vorschub mitgenommen, bewegen sich also schlupffrei mit diesem mit. Dadurch wird ein Verwischen des Aufdrucks zuverlässig vermieden. According to a preferred form of the subject matter of the invention is the pair of transport rollers or the first and second pair of transport rollers from a bearing mounted in the upper part attacking on the back of the record carrier driven roller and a mounted in the lower part towards the driven roller with the force a spring loaded on the recording side of the Record carrier attacking free-running counter role educated. The fact that the driven rollers on the Attacking the back of the record carrier becomes a blurring the still fresh print avoided. The counter roles are from the record carrier when it is fed taken along, move with it without slipping With. This makes blurring of the print reliable avoided.

Die Anordnung der Schwenkachse des Oberteils auf der gleichen Höhe wie eine die erste Gegenrolle und die erste angetriebene Rolle durchsetzenden Mittellinie oder unterhalb von dieser sorgt dafür, daß beim Verschwenken des Oberteils in dessen geöffnete Stellung bereits nach Überstreichen eines minimalen Schwenkwinkels das Transportrollenpaar und die Straffungseinrichtung geöffnet sind, der Aufzeichnungsträger beim Verschwenken also nicht mitgenommen wird.The arrangement of the pivot axis of the upper part on the same Height like a the first counter roller and the first driven one Rolling centerline or below of this ensures that when pivoting the upper part in its open position after swiping over one minimum swivel angle the pair of transport rollers and the tightening device is open, the record carrier is not taken along when swiveling.

Entsprechend einer bevorzugten Ausprägung der Erfindung ist am Unterteil wenigstens ein mit einer Klaue versehener Rasthebel schwenkbar gelagert und an der dem Rasthebel benachbarten Seitenwand des Oberteils ein Riegelzapfen angeordnet. Selbstverständlich ist auch die umgekehrte Anordnung möglich. Wesentlich ist, daß die beiden Verriegelungselemente komplementär zueinander ausgebildet sind.According to a preferred embodiment of the invention at least one with a claw on the lower part Locking lever pivotally mounted and on the adjacent to the locking lever Sidewall of the upper part arranged a locking pin. Of course, the reverse order is also possible. It is essential that the two locking elements are complementary to each other.

Entsprechend einer vorteilhaften Weiterbildung des Erfindungsgegenstandes ist an der dem Rasthebel benachbarten Seitenwand bei der der Schwenkachse fernen Seite des Oberteils ein zweischenkliger Entriegelungshebel schwenkbar gelagert, dessen einer Schenkel dazu bestimmt ist, an dem wenigstens einen Rasthebel im Sinne einer Entriegelung der komplementären Verriegelungselemente anzugreifen.According to an advantageous development of the subject matter of the invention is adjacent to the locking lever Side wall on the side of the upper part remote from the swivel axis a two-leg release lever is pivoted, one leg of which is intended to be attached to the at least a locking lever in the sense of unlocking the to attack complementary locking elements.

Von besonderem Vorteil ist es, wenn der wenigstens eine Rasthebel nur in die Entriegelungsstellung bringbar ist, wenn sich der Druckkopf in dem Parkbereich oder einem vor dem Druckbereich liegenden Beschleunigungsbereich, also außerhalb des Druckbereichs befindet. Dadurch ist beim Auswechseln der Aufzeichnungsträger-Vorratsrolle das empfindliche Mundstück des Druckkopfes vor unbefugten Berührungen und die Hände der Bedienkraft vor Verschmutzung geschützt. It is particularly advantageous if the at least one Locking lever can only be brought into the unlocked position, if the print head is in the parking area or in front of it acceleration range lying within the pressure range, i.e. outside of the print area. This is when replacing the record carrier stock roll the sensitive Mouthpiece of the printhead against unauthorized contact and the operator's hands are protected from contamination.

Um ein manuelles Verschieben des Druckkopfes bei ausgeschaltetem Drucker unmöglich zu machen, ist der Druckkopf zusätzlich in dem Parkbereich oder dem Beschleunigungsbereich blockiert, wenn sich das Oberteil außerhalb der Druckstellung befindet.To move the print head manually when the printer is switched off The printhead is to make the printer impossible additionally in the parking area or the acceleration area blocked when the top is outside the Pressure position.

Um die Gefahr des Verwischens des noch frischen Drucks noch weiter zu verringern, hat entsprechend einer bevorzugten Weiterbildung der Erfindung die in Transportrichtung hinter dem Druckkopf liegende Gegenlaufrolle, also zumindest die Gegenrolle des Transportrollenpaares bzw. des zweiten Transportrollenpaares eine von Drucktinte nicht benetzbare Oberflächenstruktur und/oder besteht aus einem von Drucktinte nicht benetzbaren Material.About the risk of blurring the still fresh print further decrease has according to a preferred Further development of the invention behind in the direction of transport the counter roller lying on the printhead, i.e. at least the Counter roller of the pair of transport rollers or the second Pair of transport rollers one that cannot be wetted by printing ink Surface structure and / or consists of a printing ink non-wettable material.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels, welches an Hand der beigefügten Zeichnung erläutert wird. Es zeigt

Fig. 1
eine schematische Seitenansicht einer Druckvorrichtung mit geschlossenem Oberteil,
Fig. 2
eine schematische Seitenansicht der Druckvorrichtung mit aufgeklapptem Oberteil,
Fig. 3
die Druckvorrichtung in einer schematisierten Draufsicht.
Further features and advantages of the invention result from the following description of an exemplary embodiment, which is explained with reference to the accompanying drawing. It shows
Fig. 1
1 shows a schematic side view of a printing device with the upper part closed,
Fig. 2
2 shows a schematic side view of the printing device with the upper part opened,
Fig. 3
the printing device in a schematic plan view.

In Fig. 1 ist eine Druckvorrichtung allgemein mit 10 bezeichnet. Sie umfaßt ein Unterteil 12 mit Seitenwangen 13 und ein Oberteil 14. Letzteres ist um eine Schwenkachse 16 am hinteren Bereich des Unterteils 12 schwenkbar gehalten, wie der Pfeil A zeigt. In Fig. 1, a printing device is generally designated 10. It comprises a lower part 12 with side cheeks 13 and an upper part 14. The latter is about a pivot axis 16 held pivotably on the rear area of the lower part 12, as the arrow A shows.

An dem Unterteil 12 ist ein Tintendruckkopf 18 in Richtung senkrecht zur Zeichnungsebene auf Führungsschienen 19 verschieblich gelagert, die in den Seitenwangen 13 gehalten sind. Unterhalb des Tintendruckkopfes 18 ist eine auf einer ersten Welle 20 frei drehbare erste Gegenrolle 22 eines ersten Transportrollenpaares 24 und oberhalb des Tintendruckkopfes 18 eine auf einer zweiten Welle 26 frei drehbare zweite Gegenrolle 28 eines zweiten Transportrollenpaares 30 angeordnet. Die beiden Enden der sich parallel zur Verschieberichtung des Tintendruckkopfes 18 erstreckenden Wellen 20, 26 werden von einer Andruckfeder 32 bzw. 34 (nur jeweils eine Andruckfeder ist zu sehen) in Richtung des Oberteils 14 elastisch vorgespannt.On the lower part 12 is an ink print head 18 in the direction Movable perpendicular to the plane of the drawing on guide rails 19 stored, which is held in the side cheeks 13 are. Below the ink print head 18 is one on one first shaft 20 freely rotatable first counter roller 22 of a first Pair of transport rollers 24 and above the ink print head 18 a freely rotatable on a second shaft 26 second counter roller 28 of a second pair of transport rollers 30 arranged. The two ends of the are parallel to the direction of displacement of the ink print head 18 extending waves 20, 26 are from a pressure spring 32 and 34 (only a pressure spring can be seen) in the direction of Upper part 14 biased elastically.

Am Oberteil 14, dem Tintendruckkopf 18 gegenüber ist ein im Bereich des Tintendruckkopfes 18 planebenes Druckgegenlager 36 befestigt. Unterhalb des Druckgegenlagers 36 ist eine erste angetriebene Rolle 38 des ersten Transportrollenpaares 24 und oberhalb des Tintendruckkopfes 18 eine zweite angetriebene Rolle 40 des zweiten Transportrollenpaares 30 angeordnet. Die erste und die zweite angetriebene Rolle 38, 40 werden von einem beiden gemeinsamen, im Unterteil 12 angeordneten nicht dargestellten Antriebsmotor angetrieben. Die zweite angetriebene Rolle 40 hat einen geringfügig größeren Umfang als die erste angetriebene Rolle 38. Das Druckgegenlager 36 und die erste und die zweite angetriebene Rolle 38, 40 sind in zwei parallel zueinander ausgerichteten Seitenwänden 42 gehalten, wobei das Druckgegenlager 36 geringfügig in Richtung des Druckkopfes 18 über die angetriebenen Rollen 38, 40 hinausragt, damit ein Aufzeichnungsträger 66 satt an diesem anliegt. Die Schwenkachse 16 des Oberteils 14 liegt auf der gleichen Höhe wie eine die erste Gegenrolle 22 und die erste angetriebene Rolle 38 durchsetzende Mittellinie 25. Sie kann auch unterhalb von dieser liegen. Dadurch wird erreicht, daß beim Verschwenken des Oberteils 14 in dessen geöffnete Stellung bereits nach Überstreichen eines minimalen Schwenkwinkels in Richtung des Pfeils A das erste Transportrollenpaar 24 und die Straffungseinrichtung -im dargestellten Ausführungsbeispiel das zweite Transportrollenpaar 30- geöffnet sind, der Aufzeichnungsträger 66 beim Verschwenken des Oberteils 14 also nicht mitgenommen wird. Umgekehrt wird beim Zurückschwenken des Oberteils 14 in seine Druckstellung der Aufzeichnungsträger 66 zuerst in dem ersten Transportrollenpaar 24 eingeklemmt. Wird der Aufzeichnungsträger 66 beim weiteren Verschwenken des Oberteils 14 in die Druckstellung manuell gestrafft, so bleibt die Spannung erhalten, wenn auch das zweite Transportrollenpaar 30 den Aufzeichnungsträger 66 einklemmt.On the upper part 14, the ink print head 18 opposite is in Area of the inkjet printhead 18 planar platen 36 attached. Below the platen 36 is one first driven roller 38 of the first pair of transport rollers 24 and a second one above the ink print head 18 driven roller 40 of the second pair of transport rollers 30 arranged. The first and second driven rollers 38, 40 are shared by two, arranged in the lower part 12 Drive motor, not shown, driven. The second driven roller 40 has a slightly larger one Scope as the first driven roller 38. That Platen 36 and the first and second driven Rollers 38, 40 are in two aligned parallel to each other Side walls 42 held, the platen 36 slightly in the direction of the print head 18 via the driven Rolls 38, 40 protrudes so that a record carrier 66 abuts this. The pivot axis 16 the upper part 14 is at the same height as one first counter roller 22 and first driven roller 38 penetrating center line 25. It can also be below this lie. This ensures that when pivoting the upper part 14 in its open position already after Scanning a minimum swivel angle in the direction arrow A the first pair of transport rollers 24 and Tightening device - in the illustrated embodiment the second pair of transport rollers 30- are opened, the record carrier 66 when pivoting the upper part 14 is not taken away. The opposite is the case when swiveling back of the upper part 14 in its printing position of the record carrier 66 first clamped in the first pair of transport rollers 24. If the record carrier 66 in the further Swiveling the upper part 14 into the pressure position manually tightened, the tension remains, even if that second pair of transport rollers 30 the recording medium 66 clamps.

Von jeder Seitenwand 42 steht ein Riegelzapfen 44 senkrecht nach außen ab. In der in Fig. 1 gezeigten Stellung des Oberteils 14 greift der Riegelzapfen 44 in eine Klaue 46 ein, welche in eine Flanke eines um einen Schwenkzapfen 48 schwenkbaren Rasthebels 50 eingearbeitet ist. Oberhalb der Klaue 46 verjüngt sich der Rasthebel 50 zu einer Einführschräge 52 für den Riegelzapfen 44. Der Rasthebel 50 ist in Richtung seiner mit durchgezogenen Linien dargestellten Verriegelungsstellung mit der Kraft einer Verriegelungsfeder 54 beaufschlagt.A locking pin 44 is perpendicular to each side wall 42 to the outside. In the position shown in Fig. 1 Upper part 14 engages the locking pin 44 in a claw 46 which in a flank of a pivot pin 48 pivotable locking lever 50 is incorporated. Above the Claw 46 tapers the locking lever 50 to an insertion bevel 52 for the locking pin 44. The locking lever 50 is in Direction of its shown with solid lines Locking position with the force of a locking spring 54 acted upon.

An den Seitenwänden 42 des Oberteils 14 ist je ein zweischenkliger Entriegelungshebel 56 um eine die Seitenwände 42 senkrecht durchsetzende zweite Schwenkachse 57 schwenkbar gelagert. Die nach oben ragenden Schenkel der Entriegelungshebel 56 sind durch einen Handgriff 58 miteinander verbunden, so daß die Entriegelungshebel-Anordnung 56, 58 das Oberteil 14 U-förmig umgreift. Der freie Schenkel 60 jedes Verriegelungshebels 56 liegt bei seiner mit durchgezogenen Linien dargestellten Ruhestellung an der Flanke des Rasthebels 50 an, in die auch die Klaue 46 eingearbeitet ist.On the side walls 42 of the upper part 14 is a two-legged Release lever 56 around one of the side walls 42 vertically penetrating second pivot axis 57 pivotable stored. The uprights of the release levers 56 are interconnected by a handle 58 connected so that the release lever assembly 56, 58th grips the upper part 14 in a U-shape. The free leg 60 each locking lever 56 is with its solid Lines shown at rest on the flank of the Locking lever 50, into which the claw 46 is also incorporated is.

Im Unterteil 12 des Druckers 10 ist zwischen den Seitenwänden 42 des Oberteils 14 und nahe der Schwenkachse 16 eine nach oben offene Aufnahmemulde 62 für eine Aufzeichnungsträger-Vorratsrolle 64 angeordnet. Das von der Unterseite der Aufzeichnungsträger-Vorratsrolle 64 ablaufende Ende des Aufzeichnungsträgers 66 ist von unten her um die erste und die zweite Transportrollenpaar 24, 30 herumgeführt.In the lower part 12 of the printer 10 is between the side walls 42 of the upper part 14 and near the pivot axis 16 a upwardly open receiving trough 62 for a recording medium supply roll 64 arranged. That from the bottom the recording medium supply roll 64 end of the Record carrier 66 is from the bottom around the first and the second pair of transport rollers 24, 30 passed around.

Durch Verstellen der Entriegelungshebel 56 in ihre mit strichpunktierten Linien dargestellte Entriegelungsstellung 56' drücken deren freie Schenkel 60 die Rasthebel 50 in ihre mit strichpunktierten Linien dargestellte Entriegelungsstellung 50', so daß das Oberteil 14 in seine in Fig. 2 dargestellte aufgeklappte Position geschwenkt werden kann. Dabei kommen die freien Schenkel 60 der Entriegelungshebel 56 außer Eingriff mit den Rasthebeln 50, die unter der Kraft der Verriegelungsferdern 54 in ihre Ursprungsstellung zurückkehren. In der aufgeklappten Position des Oberteils 14 kann die Aufzeichnungsträger-Vorratsrolle 64 in die Aufnahmemulde 62 eingelegt und der Aufzeichnungsträger 66 auf die angetriebenen Rollen 38, 40 aufgelegt werden.By adjusting the unlocking lever 56 in with Dashed lines shown unlocking position 56 'press their free legs 60 into their locking levers 50 unlocked position shown with dash-dotted lines 50 ', so that the upper part 14 in its in Fig. 2nd shown unfolded position can be pivoted. The free legs 60 of the unlocking lever come here 56 out of engagement with the locking levers 50, which under the Power of the locking locks 54 in their original position to return. In the opened position of the upper part 14 can the recording medium supply roll 64 in the receiving trough 62 inserted and the record carrier 66 on the driven rollers 38, 40 are placed.

Wird das Oberteil 14 in seine in Fig. 1 gezeigte heruntergeklappte Position gebracht, so gleiten die Riegelzapfen 44 an den Einführschrägen 52 entlang, bis sie in die Klauen 46 einrasten. Der Aufzeichnungsträger 66 wird dabei in den Antriebsrollenpaaren 24, 30 eingeklemmt. Wird deren Antriebsmotor kurz bestromt, wird der Aufzeichnungsträger 66 vor dem Druckgegenlager 36 zusätzlich gestrafft und der Drucker 10 ist druckbereit.The upper part 14 is folded down into that shown in FIG. 1 Positioned, the locking pins 44 slide along the lead-in chamfers 52 until they engage the claws 46 engage. The record carrier 66 is in the drive roller pairs 24, 30 pinched. Will their drive motor briefly energized, the record carrier 66 is forward the platen 36 additionally tightened and the printer 10 is ready to print.

Der Draufsicht in Fig. 3 ist zu entnehmen, daß der Bereich zwischen den Seitenwangen 13 in drei Abschnitte aufgeteilt ist: einen Beschleunigungsbereich 68, einen Druckbereich 70 und einen Parkbereich 72. Das Druckgegenlager 36 erstreckt sich über den gesamten Druckbereich 70. In dem in Fig. 3 sich rechts an den Druckbereich 70 anschließenden Parkbereich ist eine sogenannte Dockingstation 74 angeordnet, die eine das Austrocknen des Tintendruckkopfes 18 verhindernde Abdeckkappe 76 und eine Wischlippe 78 umfaßt. Die Dockingstation 74 kann auch zusätzlich noch eine Saugeinrichtung für die Reinigung der Tintendüsen des Tintendruckkopfes 18 umfassen. Dockingstationen für Tintendrucker sind allgemein bekannt. Ein nähere Beschreibung ihres Aufbaus und ihrer Wirkungsweise erübrigt sich also. Der Beschleunigungsbereich 68 wird benötigt, wenn in beiden Transportrichtungen des Tintendruckkopfes 18 und dabei mit gleichbleibender Druckqualität gedruckt werden soll. Wenn der Tintendruckkopf 18 von der in Fig. 3 linken Seitenwange 13 startet, hat er beim Eintreten in den Druckbereich 70 bereits seine Sollgeschwindigkeit erreicht.The top view in Fig. 3 shows that the area divided into three sections between the side walls 13 is: an acceleration area 68, a pressure area 70 and a parking area 72. The platen 36 extends over the entire pressure range 70. In the area shown in FIG. 3 parking area adjoining the printing area 70 on the right a so-called docking station 74 is arranged, which a drying out of the ink print head 18 preventing Cover cap 76 and a wiper lip 78 includes. The docking station 74 can also additionally have a suction device for cleaning the ink nozzles of the ink print head 18 include. Docking stations for ink printers are common known. A more detailed description of their structure and their Effectiveness is therefore superfluous. The acceleration range 68 is required if in both directions of transport of the ink print head 18 and with a constant Print quality should be printed. If the ink print head 18 starts from the left side cheek 13 in FIG. 3, he already has his when entering the printing area 70 Target speed reached.

Innnerhalb des Parkbereichs 72 ragt ein erster Schenkel 80 eines mit der Kraft einer dritten Andruckfeder 86 in Richtung des Oberteils 14 beaufschlagten Blockierungshebels 82 in den Verschiebeweg des Tintendruckkopfes 18. Ein zweiter Schenkel 84 des Blockierungshebels 82 hintergreift den im Bild rechten Rasthebel 50, so daß dieser blockiert ist und das Oberteil 14 nicht aus seiner Druckstellung geschwenkt werden kann. Die Blockierstellung des Blockierungshebels 82 ist strichpunktiert dargestellt. Wird der Tintendruckkopf 18 aber in seine in Fig. 3 dargestellte Parkposition gebracht, verschiebt er den Blockierungshebel 82 nach rechts in seine mit durchgezogenen Linien dargestellte Freigabeposition, der rechte Rasthebel 50 wird freigegeben und das Oberteil 14 kann aus der Druckstellung geschwenkt werden.A first leg 80 projects inside the parking area 72 one with the force of a third pressure spring 86 in the direction of the upper part 14 acted blocking lever 82nd in the path of the ink print head 18. A second Leg 84 of the blocking lever 82 engages behind the Right locking lever 50, so that it is blocked and the upper part 14 is not pivoted out of its pressure position can be. The blocking position of the blocking lever 82 is shown in dash-dotted lines. The ink printhead 18 but brought into its parking position shown in FIG. 3, he moves the blocking lever 82 to the right in its release position shown with solid lines, the right locking lever 50 is released and that Upper part 14 can be pivoted out of the pressure position.

Im Unterteil 12 des Druckers 10 ist ferner ein Druckkopf-Sperrhebel 88 höhenverschieblich gelagert. Dieser hat einen ersten Schenkel 90, der in den Verschiebeweg des Tintendruckkopfes 18 ragt. Ein zweiter Schenkel 92 des Druckkopf-Sperrhebels 88 ragt in den Schwenkweg des Oberteils 14. Der Druckkopf-Sperrhebel 88 ist zwischen einer mit seinem ersten Schenkel 90 in den Verschiebeweg des Tintendruckkopfes 18 ragenden Sperrstellung (in Fig. 1 strichpunktiert dargestellt) und einer den Verschiebeweg freigebenden Stellung (in Fig. 1 mit durchgezogenen Linien dargestellt) verstellbar. Er ist in Richtung seiner Sperrstellung mit der Kraft einer vierten Andruckfeder 94 vorgespannt. Der Druckkopf-Sperrhebel 88 ist bezüglich des Verschiebeweges des Tintendruckkopfes 18 so angeordnet, daß letzterer in der Parkposition festgehalten werden kann. Solange sich das Oberteil 14 in seiner Druckstellung befindet, wird der Druckkopf-Sperrhebel 88 in seiner Freigabeposition gehalten und der Tintendruckkopf 18 kann beliebig verschoben werden. Wird das Oberteil 14 aus der Druckstellung geschwenkt, verschiebt sich der Druckkopf-Sperrhebel 88 getrieben durch die vierte Andruckfeder 94 in seine Sperrstellung. In the lower part 12 of the printer 10 is also a printhead locking lever 88 height-adjustable. This has one first leg 90, which is in the displacement of the ink print head 18 protrudes. A second leg 92 of the printhead lock lever 88 protrudes into the swivel path of the upper part 14 Printhead locking lever 88 is between one with its first Leg 90 in the path of the ink print head 18 protruding locking position (shown in dot-dash lines in FIG. 1) and a position releasing the displacement path (shown in Fig. 1 with solid lines) adjustable. He is in the direction of his locked position with the force a fourth pressure spring 94 biased. The printhead lock lever 88 is for the displacement of the ink print head 18 arranged so that the latter in the park position can be held. As long as the top 14 is in its print position, the print head locking lever 88 held in its release position and the Ink printhead 18 can be moved as desired. Becomes the upper part 14 pivoted out of the printing position, moves printhead locking lever 88 driven by the fourth pressure spring 94 in its locked position.

Der Blockierungshebel 82 und der Druckkopf-Sperrhebel 88 wirken derart zusammen, daß einerseits das Oberteil 14 nur aus seiner Druckstellung gebracht werden kann, wenn sich der Tintendruckkopf 18 im Parkbereich 72 befindet, und daß andererseits der Tintendruckkopf 18 nur aus dem Parkbereich 72 bewegt werden kann, wenn sich das Oberteil 14 in seiner Druckstellung befindet. Dadurch wird ein zuverlässiger Schutz des Tintendruckkopfes 18 gegen zufällige Berührung erreicht.The blocking lever 82 and the printhead locking lever 88 work together in such a way that on the one hand the upper part 14 only can be brought out of its printing position if itself the ink print head 18 is in the parking area 72, and that on the other hand, the ink print head 18 only from the parking area 72 can be moved when the upper part 14 in its Pressure position. This will make it more reliable Protection of the ink printhead 18 against accidental touch reached.

Claims (14)

  1. Printing device (10) comprising a lower part (12) and an upper part (14) that is attached to said lower part (12), an imaging device (18) and a holding trough (62) for a recording medium supply roll (64) being arranged in the lower part (12), and a conveying device (24, 30) for a recording medium (66), and a print backing support (36) extending over a printing area (70) and spatially associated with the imaging device (18) being arranged in the upper part (14), the upper part (14) having two side walls (42) which laterally enclose a recording medium supply roll (64) put into the holding trough (62), and the upper part (14) being capable of pivoting about a pivot axis (16), between an opening position that opens the holding trough (62) and a printing position, in which the print backing support (36) is opposite the imaging device (18), characterized in that the imaging device is a serial-character or serial-column print head (18) which can be displaced in the direction of a line of print,
    the print backing support (36) is planar in the printing area (70) of the print head (18),
    the conveying device comprises a pair of conveyor rollers (24) that are aligned parallel to the printing area (70) and can be driven by a motor, and a tautening device (30) for the recording medium (66), and in that, as viewed in the direction of a line of print, a parking area (72) for the print head is arranged beside the printing area (70).
  2. Printing device according to Claim 1, characterized in that the print head (18) can print a number of lines of print simultaneously.
  3. Printing device according to Claim 1 or 2, characterized in that the print head is an ink jet print head (18).
  4. Printing device according to one of Claims 1 to 3, characterized in that a pair of conveyor rollers, as viewed in the conveying direction of the recording medium (66), are arranged downstream of the print backing support (36), and a recording medium brake formed of a material with a high coefficient of friction is arranged upstream of the print backing support (36).
  5. Printing device according to one of Claims 1 to 3, characterized in that a first pair of conveyor rollers (24), as viewed in the conveying direction of the recording medium (66), are arranged upstream of the print backing support (36), and a second pair of conveyor rollers (30), driven at the same time as the first pair of conveyor rollers (24), are arranged downstream of the print backing support (36), the second pair of conveyor rollers (30) being driven at a slightly greater conveying speed than the first pair of conveyor rollers (24) and having a coefficient of friction which is lower than the latter.
  6. Printing device according to Claim 4 or 5, characterized in that the pair of conveyor rollers or else the first and second pairs of conveyor rollers (24; 30) are formed by a driven roller (38; 40) which is mounted on the upper part (14) and acts on the rear of the recording medium (66), and a backing roller (22; 28) which is mounted on the lower part (12), is acted on in the direction of the driven roller (38; 40) by the force of a spring (32; 34), acts on the recording side of the recording medium (66) and runs freely.
  7. Printing device according to one of the preceding claims, characterized in that the pivot axis (16) is located at the same height as a centre line (25) which passes through the first backing roller (22) and the first driven roller (38), or underneath said line.
  8. Printing device according to one of the preceding claims, characterized in that at least one latching lever (50) is pivotably mounted on the lower part (12) and, on the side wall (42) of the upper part (14) adjacent to the latching lever (50), there is arranged a first locking element designed as a locking pin (44) or as a claw and, on the latching lever (50), there is arranged a second locking element (46) which is designed to be complementary to the first locking element.
  9. Printing device according to Claim 8, characterized in that on the side wall (42) that is adjacent to the latching lever (50), on that side of the upper part (14) that is remote from the pivot axis (16), a two-armed unlocking lever (56) is pivotably mounted, whose one arm (60) is intended to engage on the at least one latching lever (50) with the effect of unlocking the complementary locking elements (44, 46).
  10. Printing device according to Claim 9, characterized in that a latching lever (50) is arranged on both sides of the lower part (12), and an unlocking lever (56) is arranged on both sides of the upper part (14), in that the unlocking levers (56) are connected to each other in a U shape, and in that the U-shaped unlocking lever arrangement (56, 58, 56) engages over the upper part (14) and can be pivoted about a pivot axis (57) which passes perpendicularly through the side walls (42) of the upper part (14).
  11. Printing device according to one of the preceding claims, characterized in that, at least on one side of the printing area (70), an acceleration area (68) for the print head (18) adjoins said printing area (70).
  12. Printing device according to Claims 8 to 11, characterized in that the at least one latching lever (50) can be moved into the unlocking position only when the print head (18) is located in the parking area (72) or the acceleration area (68).
  13. Printing device according to Claim 12, characterized in that the print head (18) is blocked in the parking area (72) or the acceleration area (68) if the upper part (14) is outside the printing position.
  14. Printing device according to one of Claims 5 to 13, characterized in that at least the backing roller (28) of the pair of conveyor rollers or of the second pair of conveyor rollers (30) has a surface structure that cannot be wetted by printing ink and/or consists of a material that cannot be wetted by printing ink.
EP00920377A 1999-03-18 2000-03-11 Printing device with means for conveying paper Expired - Lifetime EP1161346B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19912255 1999-03-18
DE19912255 1999-03-18
PCT/DE2000/000766 WO2000056551A1 (en) 1999-03-18 2000-03-11 Printing device with means for conveying paper

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EP1161346B1 true EP1161346B1 (en) 2003-06-11

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EP (1) EP1161346B1 (en)
JP (1) JP2002539975A (en)
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US6979080B2 (en) * 2001-08-29 2005-12-27 Brother Kogyo Kabushiki Kaisha Printer having improved recording medium feeding mechanism

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DE50002534D1 (en) 2003-07-17
EP1161346A1 (en) 2001-12-12
US6637959B1 (en) 2003-10-28
JP2002539975A (en) 2002-11-26
WO2000056551A1 (en) 2000-09-28

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