EP1200268A1 - Franking machine - Google Patents

Franking machine

Info

Publication number
EP1200268A1
EP1200268A1 EP01905564A EP01905564A EP1200268A1 EP 1200268 A1 EP1200268 A1 EP 1200268A1 EP 01905564 A EP01905564 A EP 01905564A EP 01905564 A EP01905564 A EP 01905564A EP 1200268 A1 EP1200268 A1 EP 1200268A1
Authority
EP
European Patent Office
Prior art keywords
print head
conveying
print
rollers
machine according
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
EP01905564A
Other languages
German (de)
French (fr)
Other versions
EP1200268B1 (en
Inventor
Werner Haug
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.)
Frama AG
Original Assignee
Frama 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 Frama AG filed Critical Frama AG
Publication of EP1200268A1 publication Critical patent/EP1200268A1/en
Application granted granted Critical
Publication of EP1200268B1 publication Critical patent/EP1200268B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00661—Sensing or measuring mailpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0045—Guides for printing material
    • B41J11/005—Guides in the printing zone, e.g. guides for preventing contact of conveyed sheets with printhead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/20—Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/12—Sheet holders, retainers, movable guides, or stationary guides specially adapted for small cards, envelopes, or the like, e.g. credit cards, cut visiting cards
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00467—Transporting mailpieces
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00508—Printing or attaching on mailpieces
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00508—Printing or attaching on mailpieces
    • G07B2017/00516—Details of printing apparatus
    • G07B2017/00524—Printheads
    • G07B2017/00532—Inkjet
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00508—Printing or attaching on mailpieces
    • G07B2017/00516—Details of printing apparatus
    • G07B2017/00556—Ensuring quality of print
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00661—Sensing or measuring mailpieces
    • G07B2017/00669—Sensing the position of mailpieces
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00459—Details relating to mailpieces in a franking system
    • G07B17/00661—Sensing or measuring mailpieces
    • G07B2017/00693—Measuring the speed of mailpieces inside apparatus

Definitions

  • the invention relates to a franking machine with an inkjet printing unit having at least one print head for printing insertable or continuous flat shipping objects such as letters or postcards, consisting of a guide part arranged above the print head and opposite its nozzle mouth level, one of which has the shipping objects between them and opposite,
  • a conveying device transporting the shipping objects is assigned to conveying rollers rotating about axes arranged transversely to the conveying direction, the conveying device having two drive rollers forming a conveying section with the guide part, which, viewed in the advancing direction, are mounted in front of and behind the print heads, and opposite, against the driving rollers or one in between transported shipping object a pressure exerting counter pressure rollers are provided
  • Inkjet or inkjet printheads have been known for a long time and are used in particular in PC printers there when using such printheads
  • the knowledge gained cannot be transferred to the field of application in franking machines here.
  • the reasons include the high speed of the letters to be franked, their different formats and thicknesses as well as the significantly rougher environmental conditions, based on the partly dirty surfaces of the shipping objects.
  • the franking imprints must meet strict quality standards fulfill the factual requirements of the post office, which requires high construction effort and reliability
  • the present invention has for its object to provide a franking machine with an inkjet printing unit, which allows trouble-free printing and a clearly identifiable print image when franking shipping objects such as letters cards or the like
  • the printing unit has at least two print heads, which form a common nozzle mouth plane, that the print heads are each rectangular when viewed at the nozzle mouth plane, are arranged at an acute angle to the direction of the shipping objects and are partially offset from one another
  • the counter pressure is created by counter pressure rollers.
  • Two rollers are located under the right and left drive rollers.
  • a third, middle roller has the task of bringing the letter under the print heads to the required height without printing the letter against the end faces of the print heads, so that the print image remains uncleaned After franking, the counter pressure rollers move down again and open the gap for inserting a new envelope
  • the counterpressure levers are ready to insert a single letter.As soon as the letter is in its exact rear and right position on the table stop, the franking machine is activated via a reflex light barrier.
  • the main shaft 3 turns approx. 1/3 turn clockwise
  • the control levers 7 , 9 are pivoted upwards via the control rollers 29 by the control cams 1 2.
  • the counterpressure levers are also moved upwards via the tension springs 30 until the counterpressure rollers 13, 15 rest against the drive rollers 32, 33.
  • the control levers move a little further until the The control cam has reached its highest point
  • the possible overstroke of the control lever is compensated for by the spring-loaded coupling of the counterpressure lever.
  • the support roller 14 has been adjusted to the same level via the rocker arm 22.
  • the letter is now clamped between the drive rollers and the counterpressure rollers.
  • the drive motor 40 drives via the gearbox 41 d he drive rollers 32, 33 and moves the letter from right to left.
  • the speed and position are detected via the incremental encoder 42 and the feeler wheel 38.
  • the feeler wheel is driven by friction from the moving envelope and thus detects the exact speed of the surface of the letter depending on the Letter position, the inkjet printheads spray corresponding patterns line by line, which subsequently lead to the desired print image.
  • the hold-down plate or guide part 39 holds the letter at an exact distance from the printhead Front side in order to be able to obtain a clean print image with regard to the resolution and also to prevent the printed lines from being smeared when the envelope is moved.
  • the drive motor switches off and the main shaft rotates back to its basic position, the counterpressure levers take theirs again Starting position on
  • the inkjet printheads are fixed on an adjustment module. This mechanism allows the printheads to be precisely adjusted to each other so that the starting pixel of one head exactly matches the end pixel of the second head and so there are no gaps in the print image.
  • the printheads are connected to an easily exchangeable ink bag holder via tubes When using for the first time, the ink must be sucked out of the ink bag and the print heads flooded
  • FIG. 4 front view of the print heads and the print head support plates, in this
  • the print heads are offset in depth D h, so that the upper half of the print image is generated by the rear print head and the lower half by the front print head
  • the pixel rows of the two print heads must be able to be adjusted against each other.
  • the print heads are also arranged at an angle in the top view, since with this inclination the effective distance between the individual print nozzles is smaller and a higher resolution of the print image is possible is
  • a printhead is rigidly mounted, whereas the second printhead along the row of nozzles can be moved or fine-adjusted relative to the rigid printhead.
  • the hold-down plate or guide part already described is also mounted on the printhead adjustment module
  • the printhead unit is designed as a separate module, which means that it can be assembled as a copied sub-assembly and the printheads can be fine-tuned prior to installation.
  • the siarre printhead support plate 305 and the head plate 313 are mounted on the carrier plate 314 positioned and printed onto the printhead support plate 305 by means of small embossments on the clamping plate 303.Tensioning is carried out via the tension screw 310 and the press-in nut 311 309 guided
  • the collar screws 309 print the adjustable printhead support plate 304 via the spring washers 308 and the washers 302 on the support surface.
  • the adjustable print head carrier plate can be moved against the friction of this contact pressure.
  • the rear print head 301 B is positioned and held like the front one.
  • the adjustable printhead support plate 304 has a fold on the front into which a threaded bush is pressed.
  • a spring washer pack 307 and the spacer sleeve 323 are applied to this threaded bush.
  • the spring pack clamps between the bent angles of the rigid and adjustable printhead support plates.
  • the adjustable printhead support plate is adjusted using the set screw 306. When the set screw is tightened, the rear printhead moves with the printhead support plate to the front. When released, the unit moves backwards under the spring force of the spring assembly 307. The pre-tensioning of the spring assembly eliminates any play.
  • the rear printhead 301 B is set so that the foremost ink jet nozzle matches the rearmost of the front printhead or has exactly one pixel spacing of the head plate 313 there are still two column guide bushings 315 which hold the columns 316 of the hold-down plate or guide 26 guide part 317.
  • the hold-down plate resp. Guide part 317 is moved up and down via the stroke eccentric 320.
  • the compression springs 318 lift the lifting plate 319 upwards without play.

Abstract

The invention relates to a franking machine, comprising a print head of an ink-jet printing mechanism for printing flat postal items such as letters or postcards, which can be introduced into said mechanism or which pass through the same. Said franking machine consists of a guiding part which is located around the print head and projects in relation to the nozzle opening plane of said print head, and with which a conveying device is associated, said conveying device transporting the postal items between itself and conveying rollers lying opposite and rotating about axes that are located crosswise to the conveying direction. Said conveying device has two drive-connected driving rollers which together with the guiding part, form a path of travel. The driving rollers are located in front of and behind the print head in relation to the conveying direction. A reversibly liftable counter pressure roller located opposite exerts a pressure on each driving roller, respectively, or on a postal item being transported in-between. A roller feeler (39, 119) which is driven by the passing postal item and which is associated with an encoder device (122) is located between the driving rollers (13, 15; 127, 113) in order to monitor the speed and position of a postal item being transported or for controlling the pressure on a postal item.

Description

Frankiermaschinefranking machine
Die Erfindung betrifft eine Frankiermaschine mit einem wenigstens einen Druckkopfe aufweisenden Inkjet-Druckwerkes zum Bedrucken von einlegbaren oder durchlaufenden flachen Versandobjekten wie Briefe oder Postkarten, bestehend aus einem um den Druckkopf und gegenüber dessen Dusenmundungsebene vorstehend angeordneten Fuhrungsteil, dem eine die Versandobjekte zwischen sich und gegenüberliegenden, um quer zur Forderrichtung angeordnete Achsen rotierende Forderrollen einer die Versandobjekte transportierenden Fordereinrichtung zugeordnet ist, wobei die Fordereinrichtung zwei mit dem Fuhrungsteil eine Forderstrecke bildende Antriebsrollen aufweist, die in Forderrichtung betrachtet vor und hinter den Druckkopfen gelagert sind, und gegenüberliegend, gegen die Antriebsrollen resp ein dazwischen transportiertes Versandobjekt einen Druck ausübende Gegendruckrollen vorgesehen sindThe invention relates to a franking machine with an inkjet printing unit having at least one print head for printing insertable or continuous flat shipping objects such as letters or postcards, consisting of a guide part arranged above the print head and opposite its nozzle mouth level, one of which has the shipping objects between them and opposite, A conveying device transporting the shipping objects is assigned to conveying rollers rotating about axes arranged transversely to the conveying direction, the conveying device having two drive rollers forming a conveying section with the guide part, which, viewed in the advancing direction, are mounted in front of and behind the print heads, and opposite, against the driving rollers or one in between transported shipping object a pressure exerting counter pressure rollers are provided
Bei Frankiermaschinen werden heute nebst der klassischen Rotationstechnik vermehrt neue Stempelaufbringverfahren u a auf Thermo- und Inkjetbasis eingesetztIn franking machines, in addition to classic rotation technology, new stamp application processes, including those based on thermal and inkjet, are increasingly being used
Inkjet- oder Tintenstrahldruckkopfe sind seit längerem bekannt und werden insbesondere bei PC-Druckern eingesetzt Die dort beim Einsatz solcher Druckkopfe gewonnenen Erkenntnisse können nicht auf das hier vorliegende Einsatzgebiet in Frankiermaschinen übertragen werden Die Grunde liegen u a in der hohen Geschwindigkeit der zu frankierenden Briefe, deren unterschiedlichsten Formate und Dicken sowie den bedeutend rauheren Umgebungsbedingungen, beruhend auf zumTeil verschmutzten Oberflachen der Versandobjekte Zudem müssen die Frankieraufdrucke strenge Qua tatsanforderungen der Poststellen erfüllen, was hohen Konstruktionsaufwand und Zuverlässigkeit verlangtInkjet or inkjet printheads have been known for a long time and are used in particular in PC printers there when using such printheads The knowledge gained cannot be transferred to the field of application in franking machines here. The reasons include the high speed of the letters to be franked, their different formats and thicknesses as well as the significantly rougher environmental conditions, based on the partly dirty surfaces of the shipping objects. In addition, the franking imprints must meet strict quality standards fulfill the factual requirements of the post office, which requires high construction effort and reliability
Der vorliegenden Erfindung hegt die Aufgabe zugrunde, eine Frankiermaschine mit einem Inkjet-Druckwerk zu schaffen, das beim Frankieren von Versandobjekten wie Briefe Karten oder dgl ein störungsfreies Bedrucken und ein eindeutig identifizierbares Druckbild erlaubtThe present invention has for its object to provide a franking machine with an inkjet printing unit, which allows trouble-free printing and a clearly identifiable print image when franking shipping objects such as letters cards or the like
Daneben sind Voraussetzungen zu schaffen, die eine hohe Zuverlässigkeit und wartungsarme Konstruktion gewährleistenIn addition, conditions must be created that ensure high reliability and low-maintenance construction
Erfindungsgemass wird diese Aufgabe dadurch gelost, dass das Druckwerk wenigstens zwei Druckkopfe aufweist, die eine gemeinsame Dusenmundungsebene bilden dass die Druckkopfe auf die Dusenmundungsebene betrachtet jeweils rechteckig ausgebildet, in einem spitzen Winkel zur Forderrichtung der Versandobjekte und gegenseitig teilweise versetzt zueinander angeordnet sindAccording to the invention, this object is achieved in that the printing unit has at least two print heads, which form a common nozzle mouth plane, that the print heads are each rectangular when viewed at the nozzle mouth plane, are arranged at an acute angle to the direction of the shipping objects and are partially offset from one another
Nachfolgend sind die Funktionen und die Ausbildung einer Ausfuhrung der erfin- dungsgemassen Frankiermaschine beschriebenThe functions and design of an embodiment of the franking machine according to the invention are described below
Zum besseren Verständnis wird dabei auf die Bezugszeichen und Bilder in denen Ausfuhrungsformen der Erfindung dargestellt sind, Bezug genommenFor a better understanding, reference is made to the reference numerals and pictures in which embodiments of the invention are shown
1A vordere Steuerkurve für rechte Gegendruckrolle 1 B hintere Steuerkurve für rechte Gegendruckrolle 2A vordere Steuerkurve für linke Gegendruckrolle B hintere Steuerkurve für linke Gegedruckrolle Hauptwelle hintere Seitenwand vordere Seitenwand A Gegendruckhebel, links, vorne B Gegendruckhebel, links, hinten A Steuerhebel, links, vorne B Steuerhebel, links, hinten A Gegendruckhebel, rechts vorneB Gegendruckhebel, rechts, hintenA Steuerhebel, rechts, vorne B Steuerhebel, rechts, hinten 0 Achse für Gegedruckhebel und Steuerhebel 1 Anschlagbolzen für Gegendruckhebel rechts2 Anschlabbolzen für Gegendruckhebel links3 Gegendruckrolle rechts 4 Stutzrolle 5 Gegendruckrolle links 6A Schwinge, vorne für Stutzrolle 6B Schwinge, hinten für Stutzrolle 7 Achse für Schwinge 8 Federeinhangestange 9 Federeinhangung 0 Zugfeder für Steuerhebel 1 Stutzrollentrager mit Tastausleger2 Schlepphebel 3 Schneckenwelle 4 Schneckenrad 5 Gabel chtschranke 6 Schlitzscheibe 7 Schaltnocke für Hauptwellengrundstellung 8 Mikroschalter 9 Steuerrolle 0 Zugfeder für Gegedruckhebel1A front control curve for right counter pressure roller 1 B rear control curve for right counter pressure roller 2A front control curve for left counter pressure roller B rear control cam for left counter pressure roller main shaft rear side wall front side wall A counter pressure lever, left, front B counter pressure lever, left, rear A control lever, left, front B control lever, left, rear A counter pressure lever, right front B counter pressure lever, right, rear A control lever, right, front B Control lever, right, rear 0 axis for counter pressure lever and control lever 1 stop bolt for counter pressure lever right 2 connection bolt for counter pressure lever left 3 counter pressure roller right 4 support roller 5 counter pressure roller left 6A rocker arm, front for support roller 6B rocker arm, rear for support roller 7 axis for rocker arm 8 spring suspension rod 9 spring suspension 0 tension spring for control lever 1 support roller support with push arm 2 rocker arm 3 worm shaft 4 worm wheel 5 fork barrier 6 Slotted disc 7 Switch cam for main shaft basic position 8 Microswitch 9 Control roller 0 Tension spring for counter pressure lever
31 Gleichstrommotor31 DC motor
32 Antriebswalze rechts32 drive roller on the right
33 Antriebswalze links33 Drive roller on the left
34 Achse für Gegendruckrolle rechts34 Axle for counter pressure roller on the right
35 Anschlag für Schlepphebel35 Stop for rocker arm
36 Zugfeder für Schlepphebel36 Tension spring for rocker arm
37 Anschlag für Tastausleger37 Stop for push arm
38 Tastrad für Inkrementalgeber38 tracer wheel for incremental encoder
39 Niederhalteplatte resp Fuhrungsteil39 hold-down plate or guide part
40 Antriebsmotor für Vorschub40 drive motor for feed
41 Getriebe für Antriebsrollen41 Gear units for drive rollers
42 Inkrementalgeber, Encoder42 incremental encoder, encoder
43 Ausleger am Stutzrollentrager43 Boom on the support roller support
Beschreibung der Zeichnungsinhalte bei folgenden FigurenDescription of the contents of the drawing in the following figures
Fig 1 Frontansicht der kompletten Gegendruckmechanik, emschhesslichFig 1 Front view of the complete counter-pressure mechanism, sensitive
Antrieb, Tastrad und Hauptwelienantπeb und Fig 2 Draufsicht auf GegendruckmechanikDrive, feeler wheel and main shaft and Fig 2 top view of the counter pressure mechanism
Bei der Einzelbneffrankierung wird der Brief manuell in die Frankiermaschine eingelegt Fotozellen starten bei exakter Kuvertposition den Frankiervorgang Die beim Einlegen des Kuverts sich in einer unteren Position befindenden Gegendruckrollen werden über Steuerkurven der Hauptwelle nach oben bewegt und drucken das Briefgut gegen die oberen Antriebswalzen Der Brieftansport resp der Fran- kiervorgang werden nun ausgelostIn the case of single franking, the letter is manually inserted into the franking machine. Photocells start the franking process when the envelope is in the exact position. The counterpressure rollers, which are in a lower position when the envelope is inserted, are moved upwards via control cams of the main shaft and print the mail items against the upper drive rollers Fran- The drawing process will now be drawn
Der Gegendruck entsteht aus Gegendruckrollen Zwei Rollen liegen unter den rechten und linken Antriebswalzen Eine dritte, mittlere Rolle hat die Aufgabe den Brief unter den Druckkopfen auf das erforderliche Hohenniveau zu bringen, ohne den Brief gegen die Stirnflachen der Druckopfe zu drucken, damit das Druckbild unverschmiert bleibt Nach dem Frankieren bewegen sich die Gegendruckrollen wieder nach unten und geben den Spalt für das Einlegen eines neuen Kuverts freiThe counter pressure is created by counter pressure rollers. Two rollers are located under the right and left drive rollers. A third, middle roller has the task of bringing the letter under the print heads to the required height without printing the letter against the end faces of the print heads, so that the print image remains uncleaned After franking, the counter pressure rollers move down again and open the gap for inserting a new envelope
Beschreibung zu den Figuren 1 und 2Description of Figures 1 and 2
Die Gegendruckhebel sind in der Grundstellung zum Einlegen eines Einzelbriefes bereit Sobald der Brief in seiner exakten hinteren und rechts am Tischanschlag angelegten Position ist, wird über eine Reflexlichtschranke die Frankiermaschine aktiviert Zuerst dreht sich die Hauptwelle 3 um ca 1/3 Umdrehung im Uhrzeigersinn Die Steuerhebel 7, 9 werden über die Steuerrollen 29 durch die Steuerkurven 1 2 nach oben geschwenkt Die Gegendruckhebel werden über die Zugfedern 30 ebenfalls nach oben mitgewegt, bis die Gegendruckrollen 13, 15 an den Antriebswalzen 32, 33 anliegen Die Steuerhebel bewegen sich noch etwas weiter, bis die Steuerkurve ihren Hochstpunkt erreicht hat Der mögliche Uberhub der Steuerhebel wird durch die gefederte Ankopplung der Gegendruckhebel ausgeglichen Die Stutzrolle 14 hat sich über den Schlepphebel 22 auf dasselbe Niveau eingestellt Der Brief ist nun zwischen den Antriebswalzen und den Gegendruckrollen eingeklemmt Der Antriebsmotor 40 treibt über das Getriebe 41 die Antriebswalzen 32, 33 an und bewegt den Brief von rechts nach links Die Geschwindigkeits- und Posi- tionsdetektierung erfolgt über den Inkrementalgeber 42 und dasTastrad 38 DasTastrad wird über Reibung vom sich bewegenden Briefumschlag angetrieben und erfasst so die exakte Geschwindigkeit der Bnefoberflache In Abhängigkeit von der Briefposition spritzen die Tintenstrahldruckkopfe zeilenweise entsprechende Muster ab, die in Folge zu dem gewünschten Druckbild fuhren Die Niederhalteplatte resp Fuhrungsteil 39 halt den Brief auf einen exakten Abstand zu der Druckkopf- Stirnseite um bezüglich Auflosung ein sauberes Druckbild erhalten zu können und ausserdem zu verhindern, dass die gedruckten Zeilen bei der Bewegung des Kuverts verschmiert werden Nach Beendigung des Frankiervorganges schaltet der Antriebsmotor ab und die Hauptwelle dreht sich wieder in ihre Grundstellung zurück, die Gegendruckhebel nehmen wieder ihre Ausgangsstellung ein Die Tintenstrahldruckkopfe sind auf einem Justagemodul fixiert Über diese Mechanik lassen sich die Druckkopfe genau zueinander justieren, damit das Anfangspixel des einen Kopfes mit dem Endpixel des zweiten Kopfes genau übereinstimmen und so keine Druckbildlucken entstehen Die Druckkopfe werden über Schlauche an einem einfach austauschbaren Tintenbeutelbehalter angeschlossen Bei der Erstinbetriebnahme müssen die Tinte aus dem Tintenbeutel abgesaugt und die Druckkopfe geflutet werdenIn the basic position, the counterpressure levers are ready to insert a single letter.As soon as the letter is in its exact rear and right position on the table stop, the franking machine is activated via a reflex light barrier.First, the main shaft 3 turns approx. 1/3 turn clockwise The control levers 7 , 9 are pivoted upwards via the control rollers 29 by the control cams 1 2. The counterpressure levers are also moved upwards via the tension springs 30 until the counterpressure rollers 13, 15 rest against the drive rollers 32, 33. The control levers move a little further until the The control cam has reached its highest point The possible overstroke of the control lever is compensated for by the spring-loaded coupling of the counterpressure lever. The support roller 14 has been adjusted to the same level via the rocker arm 22. The letter is now clamped between the drive rollers and the counterpressure rollers. The drive motor 40 drives via the gearbox 41 d he drive rollers 32, 33 and moves the letter from right to left. The speed and position are detected via the incremental encoder 42 and the feeler wheel 38. The feeler wheel is driven by friction from the moving envelope and thus detects the exact speed of the surface of the letter depending on the Letter position, the inkjet printheads spray corresponding patterns line by line, which subsequently lead to the desired print image. The hold-down plate or guide part 39 holds the letter at an exact distance from the printhead Front side in order to be able to obtain a clean print image with regard to the resolution and also to prevent the printed lines from being smeared when the envelope is moved.After the franking process has ended, the drive motor switches off and the main shaft rotates back to its basic position, the counterpressure levers take theirs again Starting position on The inkjet printheads are fixed on an adjustment module.This mechanism allows the printheads to be precisely adjusted to each other so that the starting pixel of one head exactly matches the end pixel of the second head and so there are no gaps in the print image.The printheads are connected to an easily exchangeable ink bag holder via tubes When using for the first time, the ink must be sucked out of the ink bag and the print heads flooded
Numeπerungs- und Teilebenennungs ste für Druckkopf-JustagemodulNumbering and part naming for printhead adjustment module
301A vorderer Tintenstrahldruckkopf301A front inkjet printhead
301 B hinterer Tintenstrahldruckkopf301 B rear inkjet printhead
302 Unterlagsscheibe302 washer
303 Spannblech für Druckkopf303 clamping plate for printhead
304 verstellbare Druckkopftragerplatte304 adjustable printhead support plate
305 starre Druckkopftragerplatte305 rigid printhead support plate
306 Stellschraube306 set screw
307 Federscheibe für Justageweg307 spring washer for adjustment
308 Federscheibe für Anpressung308 spring washer for pressure
309 Bundschraube309 collar screw
310 Spannschraube310 clamping screw
311 Einpressgewindebuchse311 press-in threaded bush
312 Butzen für die Druckopfpositionierung312 slugs for positioning the print head
313 Kopf platte313 head plate
314 Tragerplatte314 carrier plate
ERSÄTZBLATT (REGEL 26) 315 SaulenfuhrungsbuchseREPLACEMENT BLADE (RULE 26) 315 column guide bushing
316 Hubsaule316 lifting column
317 Niederhalteplatte resp Fuhrungsteil317 hold-down plate or guide part
318 Druckfeder318 compression spring
319 Hubplatte319 lifting plate
320 Hubexzenter320 stroke eccentric
321 Feststellschraube321 locking screw
322 Einpressgewindebuchse322 self-clinching threaded bush
323 Distanzhulse323 distance sleeves
Beschreibung der Zeichnungsinhalte bei folgenden FigurenDescription of the contents of the drawing in the following figures
Fig 3 Draufsicht auf das Druckkopf-Justagemodul,3 top view of the printhead adjustment module,
Fig 4 Frontansicht auf die Druckkopfe und die Druckkopftragerplatten, in dieserFig. 4 front view of the print heads and the print head support plates, in this
Ansicht sind nicht alle Teile in ihrer wahren Position dargestellt und Fig 5 Frontansicht auf die Druckkopfe und die DruckkopftragerplattenView not all parts are shown in their true position and Fig 5 front view of the print heads and the print head carrier plates
Bei der hier beschriebenen Frankiermaschine werden zur Realisierung der geforderten Druckbildhohe und der Auflosung zwei Tintenstrahldruckkopfe benotigt Zur Erreichung der Druckbildhohe sind die Druckkopfe in der Tiefe gegeneinander versetzt D h , dass die obere Hälfte des Druckbildes vom hinteren Druckkopf und die untere Hälfte vom vorderen Druckkopf erzeugt wird Um im Druckbild keine Lücke oder ein Überdrucken zu erhalten, müssen die Pixelzeilen der beiden Druckkopfe gegeneinander justiert werden können Die Druckkopfe sind ausserdem in der Draufsicht schräg angeordnet, da bei dieser Schragstellung der effektive Abstand der einzelnen Druckdusen geringer und so eine höhere Auflosung des Druckbildes möglich ist Ein Druckkopf ist starr montiert, wogegen der zweite Druk- kopf entlang der Dusenreihe relativ zum starren Druckkopf verschoben bzw fein- justiert werden kann An dem Druckkopf-Justagemodul ist auch die schon beschriebene Niederhalteplatte resp Fuhrungsteil gelagert Die Druckkopfeinheit ist als eigenständiges Modul ausgeführt, d h dass die Montage als kopierte Unterbaugruppe möglich ist und die Druckkopfe vor dem Gesamteinbau feinjustiert werden können Auf der Tragerplatte 314 ist die siarre Druckkopftragerplatte 305 und die Kopfplatte 313 montiert Der vordere Druckkopf 301A wird über die Butzen 312 genau positioniert und über kleine Prägungen am Spannblech 303 an die Druckkopftragerplatte 305 angedruckt Das Spannen erfolgt über die Spannschraube 310 und die Einpressmutter 311 Auf der Ruckseite des starren Druckkopftragers sitzt die verstellbare Druckkopftragerplatte 304 Sie ist in der Tiefe verschiebbar und wird durch die Einpressgewindebuchsen 322 bzw die Bundschrauben 309 gefuhrt Die Bundschrauben 309 drucken die verstellbare Druckkopftragerplatte 304 über die Federscheiben 308 und die Unterlagsscheiben 302 an die Auflagefiache an. Die verstellbare Druckkopftragerplatte iasst sich gegen die Reibung dieser Anpresskraft verschieben Der hintere Druckkopf 301 B ist wie der vordere positioniert und gehalten. Die verstellbare Druckkopftragerplatte 304 weist an der vorderen Seite einen Umbug auf, in den eine Gewindebuchse emgepresst ist Auf diese Gewindebuchse sind ein Federscheibenpaket 307 und die Distanzhulse 323 aufgebracht Das Federpaket verspannt sich zwischen den abgebogenen Winkeln der starren und verstellbaren Druckkopftragerplatten. Die Justage der verstellbaren Druckkopftragerplatte erfolgt über die Stellschraube 306 Beim Anziehen der Stellschraube bewegt sich der hintere Druckkopf mit der Druckkopftragerplatte nach vorne. Beim Losen wandert die Einheit unter der Federkraft des Federpaketes 307 nach hinten. Durch die Vorspannung des Federpaketes wird jegliches Spiel aufgehoben. Der hintere Druckkopf 301 B wird so eingestellt, dass die vorderste Tintenstrahlduse mit der hintersten des vorderen Druckkopfes übereinstimmt bzw exakt einen Pixelabstand aufweist Nachdem die Druckkopfe exakt justiert sind, wird der verstellbare Teil mittels der Feststellschraube 321 fixiert, damit sich dieser nicht mehr verstellen kann In der Kopfplatte 313 sitzen noch zwei Saulenfuhrungsbuchsen 315, die die Säulen 316 der Niederhalteplatte resp Füh- GEL 26 rungsteil 317 führen. Die Niederhalteplatte resp. Führungsteil 317 wird über die Hubexzenter 320 auf und abbewegt. Die Druckfedern 318 heben die Hubplatte 319 spielfrei nach oben an. In the franking machine described here, two inkjet printheads are required to achieve the required print image height and resolution.To achieve the print image height, the print heads are offset in depth D h, so that the upper half of the print image is generated by the rear print head and the lower half by the front print head In order to avoid any gaps or overprinting in the print image, the pixel rows of the two print heads must be able to be adjusted against each other. The print heads are also arranged at an angle in the top view, since with this inclination the effective distance between the individual print nozzles is smaller and a higher resolution of the print image is possible is A printhead is rigidly mounted, whereas the second printhead along the row of nozzles can be moved or fine-adjusted relative to the rigid printhead. The hold-down plate or guide part already described is also mounted on the printhead adjustment module The printhead unit is designed as a separate module, which means that it can be assembled as a copied sub-assembly and the printheads can be fine-tuned prior to installation. The siarre printhead support plate 305 and the head plate 313 are mounted on the carrier plate 314 positioned and printed onto the printhead support plate 305 by means of small embossments on the clamping plate 303.Tensioning is carried out via the tension screw 310 and the press-in nut 311 309 guided The collar screws 309 print the adjustable printhead support plate 304 via the spring washers 308 and the washers 302 on the support surface. The adjustable print head carrier plate can be moved against the friction of this contact pressure. The rear print head 301 B is positioned and held like the front one. The adjustable printhead support plate 304 has a fold on the front into which a threaded bush is pressed. A spring washer pack 307 and the spacer sleeve 323 are applied to this threaded bush. The spring pack clamps between the bent angles of the rigid and adjustable printhead support plates. The adjustable printhead support plate is adjusted using the set screw 306. When the set screw is tightened, the rear printhead moves with the printhead support plate to the front. When released, the unit moves backwards under the spring force of the spring assembly 307. The pre-tensioning of the spring assembly eliminates any play. The rear printhead 301 B is set so that the foremost ink jet nozzle matches the rearmost of the front printhead or has exactly one pixel spacing of the head plate 313 there are still two column guide bushings 315 which hold the columns 316 of the hold-down plate or guide 26 guide part 317. The hold-down plate resp. Guide part 317 is moved up and down via the stroke eccentric 320. The compression springs 318 lift the lifting plate 319 upwards without play.

Claims

PATENTANSPRÜCHE
1. Frankiermaschine mit einem wenigstens einen Druckkopf aufweisenden Inkjet-Druckwerk zum Bedrucken von einlegbaren oder durchlaufenden flachen Versandobjekten, wie Briefe oder Postkarten, bestehend aus einem um den Druckkopf und gegenüber dessen Dusenmundungsebene vorstehend angeordneten Führungsteil (317), dem eine die Versandobjekte zwischen sich und gegenüberliegenden, um quer zur Förderrichtung angeordnete Achsen rotierende Förderrollen einer die Versandobjekte transportierenden Fördereinrichtung zugeordnet ist, wobei die Fördereinrichtung zwei mit dem Führungsteil eine Förderstrecke bildende Antriebsrollen aufweist, die in Förderrichtung (F) betrachtet vor und hinter dem Druckkopf gelagert sind, und gegenüberliegend, gegen die Antriebsrollen resp. ein dazwischen transportiertes Versandobjekt einen Druck ausübende Gegendruckrollen vorgesehen sind, dadurch gekennzeichnet, dass das Druckwerk wenigstens zwei Druckköpfe (301 A, 301 B) aufweist, die eine gemeinsame Düsen- mundungsebene bilden, dass die Druckkopfe (301 A, 301 B) auf die Dusenmundungsebene betrachtet jeweils rechteckig ausgebildet in einem spitzen Winkel zur Forderrichtung (F) der Versandobjekte und gegenseitig teilweise versetzt zueinander angeordnet sind1. franking machine with an inkjet printing unit having at least one print head for printing insertable or continuous flat shipping objects, such as letters or postcards, consisting of a guide part (317) arranged above the print head and opposite its nozzle mouth plane, one of which has the shipping objects between itself and opposite conveying rollers rotating about axes arranged transversely to the conveying direction is assigned to a conveying device transporting the objects to be dispatched, the conveying device having two drive rollers forming a conveying path with the guide part, which, viewed in the conveying direction (F), are mounted in front of and behind the print head, and opposite, opposite the drive rollers respectively. a shipping object transported between them is provided with pressure-exerting counter-pressure rollers, characterized in that the printing unit has at least two print heads (301 A, 301 B) which have a common nozzle Form the mouth plane, that the print heads (301 A, 301 B), viewed on the nozzle mouth plane, each have a rectangular shape at an acute angle to the direction (F) of the shipping objects and are partially offset from one another
Maschine nach Anspruch 1 , dadurch gekennzeichnet, dass wenigstens einer der Druckkopfe (301 A, 301 B) in der von der Forderrichtung (F) der Versandobjekte abweichenden Richtung gegenüber dem anderen Druckkopf (301 A, 301 B) verschiebbar istMachine according to claim 1, characterized in that at least one of the print heads (301 A, 301 B) is displaceable in the direction deviating from the forward direction (F) of the shipping objects relative to the other print head (301 A, 301 B)
Maschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der verstellbare Druckkopf (301 B) an einer gegenüber einer den ortsfesten Druckkopf (301A) aufnehmenden, senkrecht zur Dusenmundungsebene angeordneten stationären Druckkopftragerplatte (305) verstellbaren Druckkopftragerplatte (304) befestigt istMachine according to Claim 1 or 2, characterized in that the adjustable print head (301 B) is attached to a print head support plate (304) which is adjustable relative to a stationary print head support plate (305) which accommodates the fixed print head (301A) and is perpendicular to the nozzle mouth plane
Maschine nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Druckkopftragerplatten (304, 305) durch eine in Verstellrichtung wirkende Spannvorrichtung (306, 307) ausgebildet ist.Machine according to one of claims 2 or 3, characterized in that the print head support plates (304, 305) is formed by a tensioning device (306, 307) acting in the adjustment direction.
5. Maschine nach 4, dadurch gekennzeichnet, dass die mit den Rückseiten aneinanderliegenden Druckkopftragerplatten (304, 305) an einem in Verstellrichtung angeordneten Ende durch abgewinkelte Abschnitte ausgebildet sind, zwischen denen eine an einer die Abschnitte verbindenden Stellschraube (306) angeordnete Feder (307) vorgesehen ist.5. Machine according to 4, characterized in that the print head support plates (304, 305) lying against one another at the rear are formed at one end arranged in the adjustment direction by angled sections, between which a spring (307) arranged on an adjusting screw (306) connecting the sections. is provided.
6. Maschine nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass die verstellbare Druckkopftragerplatte (304) durch eine sie durchsetzende, in der ortsfesten Druckkopftragerplatte (305) verdrehbar befestigte Schraube (309) arretierbar ist. 6. Machine according to one of claims 3 to 7, characterized in that the adjustable print head support plate (304) by a penetrating, in the fixed print head support plate (305) rotatably fastened screw (309) can be locked.
EP01905564A 2000-02-23 2001-02-23 Franking machine Expired - Lifetime EP1200268B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3452000 2000-02-23
CH345002000 2000-02-23
PCT/CH2001/000121 WO2001062506A1 (en) 2000-02-23 2001-02-23 Franking machine

Publications (2)

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EP1200268A1 true EP1200268A1 (en) 2002-05-02
EP1200268B1 EP1200268B1 (en) 2004-05-06

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EP01905559A Expired - Lifetime EP1183155B1 (en) 2000-02-23 2001-02-22 Franking machine
EP01905558A Expired - Lifetime EP1183154B1 (en) 2000-02-23 2001-02-22 Franking machine
EP01905560A Expired - Lifetime EP1183156B1 (en) 2000-02-23 2001-02-22 Franking machine
EP01905564A Expired - Lifetime EP1200268B1 (en) 2000-02-23 2001-02-23 Franking machine

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EP01905560A Expired - Lifetime EP1183156B1 (en) 2000-02-23 2001-02-22 Franking machine

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US (4) US7255422B2 (en)
EP (4) EP1183155B1 (en)
AT (4) ATE277770T1 (en)
AU (4) AU782070B2 (en)
CA (4) CA2368355A1 (en)
DE (4) DE50102184D1 (en)
WO (4) WO2001062503A1 (en)

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WO2001062504A1 (en) 2001-08-30
US6973433B2 (en) 2005-12-06
AU782076B2 (en) 2005-06-30
US20030007820A1 (en) 2003-01-09
AU8156301A (en) 2002-02-28
ATE277770T1 (en) 2004-10-15
WO2001062506A1 (en) 2001-08-30
US6910766B2 (en) 2005-06-28
CA2368358A1 (en) 2001-08-30
US7255422B2 (en) 2007-08-14
AU782136B2 (en) 2005-07-07
EP1200268B1 (en) 2004-05-06
AU782070B2 (en) 2005-06-30
DE50102191D1 (en) 2004-06-09
ATE265934T1 (en) 2004-05-15
DE50103192D1 (en) 2004-09-16
CA2368355A1 (en) 2001-08-30
US20030016981A1 (en) 2003-01-23
EP1183154A1 (en) 2002-03-06
AU782071B2 (en) 2005-06-30
CA2368360A1 (en) 2001-08-30
ATE273138T1 (en) 2004-08-15
EP1183156A1 (en) 2002-03-06
ATE265935T1 (en) 2004-05-15
AU8156201A (en) 2002-02-28
EP1183154B1 (en) 2004-08-11
EP1183155B1 (en) 2004-05-06
AU8156101A (en) 2002-02-28
US20020161728A1 (en) 2002-10-31
CA2368351A1 (en) 2001-08-30
WO2001062503A1 (en) 2001-08-30
DE50102184D1 (en) 2004-06-09
US20030158825A1 (en) 2003-08-21
WO2001062505A1 (en) 2001-08-30
DE50103845D1 (en) 2004-11-04
EP1183155A1 (en) 2002-03-06
EP1183156B1 (en) 2004-09-29
US8341094B2 (en) 2012-12-25
AU8156401A (en) 2002-02-28

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