EP1183155B1 - Franking machine - Google Patents

Franking machine Download PDF

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Publication number
EP1183155B1
EP1183155B1 EP01905559A EP01905559A EP1183155B1 EP 1183155 B1 EP1183155 B1 EP 1183155B1 EP 01905559 A EP01905559 A EP 01905559A EP 01905559 A EP01905559 A EP 01905559A EP 1183155 B1 EP1183155 B1 EP 1183155B1
Authority
EP
European Patent Office
Prior art keywords
roller
counter pressure
rollers
letter
drive
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
EP01905559A
Other languages
German (de)
French (fr)
Other versions
EP1183155A1 (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 EP1183155A1 publication Critical patent/EP1183155A1/en
Application granted granted Critical
Publication of EP1183155B1 publication Critical patent/EP1183155B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00661Sensing or measuring mailpieces
    • 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
    • B41J11/0045Guides for printing material
    • B41J11/005Guides in the printing zone, e.g. guides for preventing contact of conveyed sheets with printhead
    • 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
    • B41J11/20Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
    • 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
    • B41J13/00Devices 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
    • B41J13/10Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/12Sheet holders, retainers, movable guides, or stationary guides specially adapted for small cards, envelopes, or the like, e.g. credit cards, cut visiting cards
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00467Transporting mailpieces
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00508Printing or attaching on mailpieces
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00508Printing or attaching on mailpieces
    • G07B2017/00516Details of printing apparatus
    • G07B2017/00524Printheads
    • G07B2017/00532Inkjet
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00508Printing or attaching on mailpieces
    • G07B2017/00516Details of printing apparatus
    • G07B2017/00556Ensuring quality of print
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00661Sensing or measuring mailpieces
    • G07B2017/00669Sensing the position of mailpieces
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07BTICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00Franking apparatus
    • G07B17/00459Details relating to mailpieces in a franking system
    • G07B17/00661Sensing or measuring mailpieces
    • G07B2017/00693Measuring the speed of mailpieces inside apparatus

Definitions

  • the invention relates to a franking machine with at least one print head Inkjet printing unit for printing on insertable or continuous flat Shipping objects such as letters or postcards, consisting of one around the print head and arranged above the nozzle orifice plane Guide part, which one the shipping objects between themselves and opposite, conveyor rollers rotating about axes arranged transversely to the conveying direction is assigned to the conveying device transporting objects, the Conveyor device two drive-connected with the guide part forming a conveyor line Has drive rollers, viewed in the conveying direction in front and behind the printhead are arranged and that one opposite each other a driving role resp. a shipping object transported in between a print exercising, reversibly raised counter pressure roller is arranged.
  • a postage meter is in US-A-5 166 883 disclosed.
  • Inkjet or inkjet printheads have long been known and in particular are used in PC printers.
  • Insights gained cannot apply to the field of application here Franking machines are transmitted.
  • the reasons include in high speed the letters to be franked, their different formats and Thicknesses, as well as the significantly rougher environmental conditions, due to partly dirty surfaces of the shipping objects. They also have to Franking imprints often meet strict post office quality requirements high design effort and reliability required.
  • US 5'440'979 A1 relates to a franking machine for canceling postage stamps and for printing information on an envelope.
  • This franking machine has a conveyor system with two revolving conveyor belts, between which the depths in the lower edge area are recorded and transported vertically. So that there is a sufficient frictional connection between the working strands of the conveyor belts and the envelopes, freely rotatable rollers which press on the conveyor belts are provided behind and in front of the conveyor system.
  • a scanning wheel of an encoder which is connected to the conveyor belt for speed monitoring of the conveyor system, is provided.
  • the front edge of the envelope triggers the printing process of the print heads over time.
  • the sensor that detects the front edge of the envelope sends a signal to a computer, from which control signals for triggering the pressure are sent to the print heads via a control panel.
  • the computer Based on the input from the sensor, the computer determines the position at which point the envelope is to be printed and also determines which of the print heads is to be activated for printing in the specific position.
  • the present invention has for its object in a franking machine to ensure that the printing unit when franking shipping objects such as letters, cards or the like with different thicknesses, different formats and materials a trouble-free printing and a clearly identifiable Print image allowed. Because nowadays such machines enable high throughputs fully automatic operation is also required. Because from the thinnest objects (quasi single sheet) to thick letters a wide one Occurrence of shipping objects with different mechanical properties - for example, due to the bending behavior - and in a wide variety of formats to be printed or franked must be done during the entire printing phase the printing process with the throughput speed resp. that of the shipping object distance traveled must be coordinated or controlled. In addition, conditions must be created that are highly reliable and Ensure low-maintenance construction.
  • this object is achieved in that for speed and position monitoring of a transported shipping object or.
  • a feeler wheel driven by the passing shipping object and assigned to an encoder device is arranged. This means that simple means can be used to achieve a high level of precision when printing on the shipping objects.
  • the letter In the case of single letter franking, the letter is inserted manually into the franking machine. Photocells start the franking process with an exact envelope 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 press the mail item against the upper drive rollers.
  • the letter transport resp. the franking process is triggered.
  • the counter pressure consists of two counter pressure rollers and an intermediate support roller.
  • the counter pressure rollers are located under the right and left drive rollers.
  • the support roller has the task of keeping the letter under the print heads at the required height level without pressing the letter against the end faces of the print heads, so that the printed image remains unsmeared.
  • the counter-pressure rollers and the support roller move down again and open the gap for inserting a new envelope.
  • a plurality of control cams 1A, 1B and 2A, 2B are arranged on the main shaft 3, the control levers 7A, 7B and 9A, 9B via the control rollers 29 about the axis 10 pivoting, raise or lower more or less depending on the required position.
  • the basic position of the main shaft 3 is via a control cam 27 switched microswitch 28 found.
  • the worm gear is driven by the motor 31 23/24 driven and the main shaft in the "insert letter" positions, "Franking" or “Service” turned. The exact position is determined by a Fork light barrier 25 and the slotted disc 26 on the motor shaft per electronic control achieved.
  • the right and left counter pressure levers 6A, 6B and 8A, 8B are by those attached to the control levers 7A, 6B and 9A, 9B
  • Tension springs 30 pivoted upwards about the axis 10 until the counter pressure rollers 13, 15 rest on the upper drive rollers 32, 33.
  • the control levers 7A, 7B and 9A, 9B reach their end positions via the control cams 1A, 1B and 2A, 2B, which leads to The consequence is that the tension springs 36 are biased a little further.
  • the secure support between the control rollers 29 and the control curves 1A, 1B and 2A, 2B is supported by the tension springs 29 attached to the spring suspension rod 18 reached.
  • the rocker arm 22 seated on the axis of rotation of support roller 14 is in axis 34 the right counter pressure rollers 13 hooked in and must be when lowering the right counter pressure lever 6A, 6B forcibly move down with and reaches the level of the right counter pressure roller.
  • the rocker arm 22 is supported from the stop 35 against the support roller carrier 21 from left turning rigid.
  • the rocker arm 22 can rotate clockwise against the force of the tension spring 36 turn away from the stop 35. This is because of the mutual scanning between right and left counter pressure roller required and will be more precise later described.
  • the counterpressure levers are ready for inserting a single letter in the basic position. 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 rotates clockwise by about 1/3 of a turn. The control levers 7, 9 are pivoted upward via the control rollers 29 by the control cams 1, 2. The counter pressure levers are also moved upwards via the tension springs 30 until the counter pressure rollers 13, 15 rest against the drive rollers 32, 33. The control levers move a little further until the control curve has reached its peak. The possible overstroke of the control lever is compensated for by the spring-loaded coupling of the counter pressure lever.
  • the support roller 14 has adjusted itself to the same level via the rocker arm 22.
  • the letter is now clamped between the drive rollers and the counter pressure rollers.
  • the drive motor 40 (see FIG. 8) drives the drive rollers 31, 33 via the transmission 41 and moves the letter from right to left.
  • the speed and position are detected by 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.
  • the letter is pressed onto the feeler wheel via a separate counterpressure, which will be described separately later.
  • the inkjet print heads spray corresponding patterns from cell to cell, which in turn lead to the desired print image.
  • Guide part 39 holds the letter at an exact distance from the print head face side in order to be able to obtain a clean printed image with regard to resolution and also to prevent the printed lines from being smeared when the envelope is moved.
  • the drive motor 40 switches off and the main shaft 3 rotates back into its basic position, the counterpressure levers 6A, 6B; 8A, 8B return to their starting position. A new letter can be inserted.
  • the main shaft 3 rotates between the "insert” and "franking” positions only about 1/3 turn back and forth, which brings a considerable time advantage and also protects the mechanics.
  • the counter pressure rollers After another 1/3 turn, the counter pressure rollers have reached their absolutely lowest position, as is necessary in the service position (see Figure 4). Back to the basic position "insert" again only 1/3 turn is required.
  • the thick letter is also below the left Drive roller 15 driven.
  • the left counter pressure lever had to be against spring force also move down and has the same height level as the right one Counter pressure roller or the middle support roller assumed.
  • the stop 37 of the the left counter pressure lever has contact with the push arm of the support roller support 21 added.
  • position monitoring is carried out via a separate one Touch wheel that drives an encoder disc directly.
  • the encoder disc or that The feeler wheel is exactly between the drive rollers, on the middle of the two print heads arranged.
  • the signals are evaluated via an encoder.
  • the exact one The starting position when inserting the letter manually is from a reflex light barrier supplied, which detects the position of the right edge of the letter. With automatic This zero point signal is fed by a fork light barrier from the letter feeder peripheral automatic feeder supplied. From this start signal onwards Touch the feeler wheel for the exact position of the letter.
  • the Tatrad when the zero point is triggered has not yet reached and therefore cannot drive, this must be done for a short Distance via the driven button counterpressure.
  • the proof of the driven counter pressure roller to the feeler wheel or the left drive roller via the cam-controlled mechanism of the remaining counter pressure levers or rollers.
  • the speed of the is controlled by two friction wheels and several intermediate wheels transfer left drive roller to the feeler wheel.
  • the left and right drive rollers are firmly coupled via a spur gear, so that the speed of the letter driven by the right roll at the speed of the left drive roll to match. Small differences don't matter here, there are still printing has not started.
  • the speed of the driven back pressure no longer matters.
  • the feeler wheel becomes the same speed due to the friction between the letter surface and the feeler wheel circumference driven.
  • the counter pressure wheel that previously acted as a friction wheel drive now only has a pressing function, since the envelope is between the friction partners pushed.
  • the begins Printing process in the designated letter position According to the respective Envelope position, the print heads line-by-line patterns that correspond to the corresponding one Guide overall print image. After a certain distance that leaves Envelopes the right drive roller and is only left of the left drive roller emotional.
  • the feeler wheel scans the speed until the end of the letter. Around 10 mm before the end of the envelope the printing is finished.
  • the counter pressure lever 101 of the driven incremental encoder is on the to Side wall riveted axis of rotation 102 pivoted.
  • the up and down movement of the counterpressure lever takes place in connection with the remaining counterpressure levers. This function is described separately.
  • the counter pressure lever 101 will over the riveted stop bolt 103 and through the stop edge 104 of the Control lever 105 moves up and down.
  • the overstroke of the control lever is by The contact of the friction wheel 108 on the feeler wheel 119 is balanced by the tension spring 116.
  • the friction wheel 108 is rotatably supported on the riveted axis of rotation 131.
  • About two Linking tabs 106, 107 are the left back pressure lever 120 and the back pressure lever 101 rotatably connected with each other and guarantee for the connecting gear constant center distances with simultaneous degree of freedom of rotation.
  • the Friction wheel 109 which sits on the same axis 117 as the counter-pressure roller 114 driven by the left drive roller 113 (friction pairing 125). Over the spur wheels 112, 111, 110, the friction wheel 108 is driven at the same speed (friction pairing 126).
  • the counter pressure levers are raised so far up until the corresponding counter pressure rollers on the drive rollers or the feeler wheel.
  • the feeler wheel is driven up to the Time at which the envelope arrives between friction wheel 108 and feeler wheel 119 through the gear chain from the left drive roller via friction and idler gears to the feeler wheel.
  • the scanning surface of the feeler wheel (Shell surface) can be roughened, knurled to increase grip or the like.
  • the driven counter pressure of the incremental encoder also has the advantage that the feeler wheel does not have to be accelerated by the letter arriving from the feeding. This point is not important for manual feeding, since all rotating parts are accelerated from standstill at the same time.
  • the feeler wheel 119 sits together with the encoder slotted disk 121 on the axis 123, which is supported by means of two precision ball bearings.
  • the encoder 122 samples the signals and passes them on to the control electronics.
  • the quality of the scanning of the letter speed and the position is of enormous importance for the print quality.
  • the chronological sequence of the spraying of the line-by-line printing pattern occurs depending on the letter speed and thus the letter position.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Ink Jet (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Common Mechanisms (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

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

Die Erfindung betrifft eine Frankiermaschine mit wenigstens einem Druckkopf eines Inkjet-Druckwerkes zum Bedrucken von einlegbaren oder durchlaufenden flachen Versandobjekten wie Briefe oder Postkarten, bestehend aus einem um den Druckkopf und gegenüber dessen Düsenmündungsebene vorstehend angeordneter Führungsteil, 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, antriebsverbundene Antriebsrollen aufweist, die in Förderrichtung betrachtet vor und hinter dem Druckkopf angeordnet sind und dass gegenüberliegend jeweils eine gegen eine Antriebsrolle resp. ein dazwischen transportiertes Versandobjekt einen Druck ausübende, reversierbar anhebbare Gegendruckrolle angeordnet ist. Solch eine Frankiermaschine ist in US-A-5 166 883 offenbart.The invention relates to a franking machine with at least one print head Inkjet printing unit for printing on insertable or continuous flat Shipping objects such as letters or postcards, consisting of one around the print head and arranged above the nozzle orifice plane Guide part, which one the shipping objects between themselves and opposite, conveyor rollers rotating about axes arranged transversely to the conveying direction is assigned to the conveying device transporting objects, the Conveyor device two drive-connected with the guide part forming a conveyor line Has drive rollers, viewed in the conveying direction in front and behind the printhead are arranged and that one opposite each other a driving role resp. a shipping object transported in between a print exercising, reversibly raised counter pressure roller is arranged. Such a postage meter is in US-A-5 166 883 disclosed.

Bei Frankiermaschinen werden heute nebst der klassischen Rotationstechnik vermehrt neue Stempelaufbringverfahren, u.a. auf Thermo- und Inkjetbasis, eingesetzt.In franking machines, in addition to the classic rotation technology, there is a growing number today new stamp application processes, e.g. based on thermal and inkjet.

Die Erfahrung zeigt, dass dabei nicht nur der Druckkopf ersetzt werden muss, sondern je nach Drucktechnik der gesamte Frankiermaschinenaufbau grösseren und sehr aufwendigen, d.h. auch entsprechend kostspieligen Änderungen und Experience shows that not only the printhead has to be replaced, Depending on the printing technology, the entire franking machine structure is larger and very complex, i.e. also corresponding to expensive changes and

Anpassungen unterworfen ist.Is subject to adjustments.

Inkjet- oder Tintenstrahldruckköpfe sind seit längerem bekannt und werden insbesondere bei PC-Druckern eingesetzt. Die dort beim Einsatz solcher Druckköpfe gewonnenen Erkenntnisse können nicht auf das hier vorliegende Einsatzgebiet in Frankiermaschinen übertragen werden. Die Gründe liegen u.a. in der hohen Geschwindigkeit der zu frankierenden Briefe, deren unterschiedlichsten Formate und Dicken, sowie den bedeutend rauheren Umgebungsbedingungen, begründet durch zumTeil verschmutzte Oberflächen der Versandobjekte. Zudem müssen diese Frankieraufdrucke oft strenge Qualitätsanforderungen der Poststellen erfüllen, was hohen Konstruktionsaufwand und Zuverlässigkeit verlangt.Inkjet or inkjet printheads have long been known and in particular are used in PC printers. The one there when using such printheads Insights gained cannot apply to the field of application here Franking machines are transmitted. The reasons include in high speed the letters to be franked, their different formats and Thicknesses, as well as the significantly rougher environmental conditions, due to partly dirty surfaces of the shipping objects. They also have to Franking imprints often meet strict post office quality requirements high design effort and reliability required.

Die US 5'440'979 A1 betrifft eine Frankiermaschine zur Entwertung von Briefmarken und zum Druck von Informationen auf einen Briefumschlag.
Diese Frankiermaschine weist ein Fördersystem mit zwei umlaufenden Transportbändern auf, zwischen denen die Biefe im unteren Randbereich erfasst und senkrecht stehend transportiert werden. Damit ein ausreichender Reibungsschluss zwischen den Arbeitstrums der Transportbänder und den Umschlägen entsteht, sind hinter und vor dem Fördersystem auf die Transportbänder drückende, frei drehbare Rollen vorgesehen. Auf dem Förderweg sind zwischen einer letzten hinteren Rolle und einer vorderen Rolle Lichtleiter resp. Glasfasersensoren montiert, an die ein Druckwerk mit auf die Rückseite der Förderbänder einwirkenden Führungsleisten anschliesst. In Förderrichtung vor dem Sensor ist ein mit dem Förderband antriebsverbundenes Tastrad eines Encoders zur Geschwindigkeitsüberwachung des Fördersystems vorgesehen. Die Vorderkante des Briefumschlages löst über die Zeit den Druckvorgang der Druckköpfe aus. Der die Vorderkante des Briefumschlages erfassende Sensor schickt ein Signal an einen Rechner, von dem aus über einen Steuerpanel Steuersignale zur Auslösung des Druckes an die Druckköpfe geleitet werden. Der Rechner bestimmt aufgrund des Inputs des Sensors die Position, an welcher Stelle der Briefumschlag zu bedrucken ist und bestimmt weiterhin, weicher der Druckköpfe zum Druck in der bestimmten Position zu aktivieren ist.
US 5'440'979 A1 relates to a franking machine for canceling postage stamps and for printing information on an envelope.
This franking machine has a conveyor system with two revolving conveyor belts, between which the depths in the lower edge area are recorded and transported vertically. So that there is a sufficient frictional connection between the working strands of the conveyor belts and the envelopes, freely rotatable rollers which press on the conveyor belts are provided behind and in front of the conveyor system. On the conveyor path between a last rear role and a front role light guide, respectively. Glass fiber sensors are installed, to which a printing unit with guide strips acting on the rear of the conveyor belts is connected. In the conveying direction in front of the sensor, a scanning wheel of an encoder, which is connected to the conveyor belt for speed monitoring of the conveyor system, is provided. The front edge of the envelope triggers the printing process of the print heads over time. The sensor that detects the front edge of the envelope sends a signal to a computer, from which control signals for triggering the pressure are sent to the print heads via a control panel. Based on the input from the sensor, the computer determines the position at which point the envelope is to be printed and also determines which of the print heads is to be activated for printing in the specific position.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, bei einer Frankiermaschine dafür Sorge zu tragen, dass das Druckwerk beim Frankieren von Versandobjekten wie Briefe, Karten oder dgl. mit unterschiedlichen Dicken, verschiedenen Formaten und Materialien ein störungsfreies Bedrucken und ein eindeutig identifizierbares Druckbild erlaubt. Da heutzutage derartige Maschinen hohe Durchsätze ermöglichen müssen, wird auch ein vollautomatischer Betrieb verlangt. Da von dünnsten Objekten (quasi Einzelblatt) bis zu dicken Briefen ein breites Vorkommen an Versandobjekten mit unterschiedlichsten mechanischen Eigenschaften -beispielsweise durch das Biegeverhalten- und auf verschiedensten Formaten gedruckt bzw. frankiert werden soll, muss während der gesamten Druckphase der Druckvorgang mit der Durchlaufgeschwindigkeit resp. dem von dem Versandobjekt zurückgelegten Weg abgestimmt bzw. kontrolliert sein. Daneben sind Voraussetzungen zu schaffen, die eine hohe Zuverlässigkeit und wartungsarme Konstruktion gewährleisten.The present invention has for its object in a franking machine to ensure that the printing unit when franking shipping objects such as letters, cards or the like with different thicknesses, different formats and materials a trouble-free printing and a clearly identifiable Print image allowed. Because nowadays such machines enable high throughputs fully automatic operation is also required. Because from the thinnest objects (quasi single sheet) to thick letters a wide one Occurrence of shipping objects with different mechanical properties - for example, due to the bending behavior - and in a wide variety of formats to be printed or franked must be done during the entire printing phase the printing process with the throughput speed resp. that of the shipping object distance traveled must be coordinated or controlled. In addition, conditions must be created that are highly reliable and Ensure low-maintenance construction.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass zur Geschwindigkeitsund Positionsüberwachung eines transportierten Versandobjektes resp. zur Steuerung des Druckes auf einem Versandobjekt, zwischen den Antriebsrollen ein durch das passierende Versandobjekt angetriebenes, einer Encodervorrichtung zugeordnetes Tastrad angeordnet ist.
Damit lässt sich mit einfachen Mitteln eine hohe Präzision beim Bedrucken der Versandobjekte erzielen.
According to the invention, this object is achieved in that for speed and position monitoring of a transported shipping object or. To control the pressure on a shipping object, a feeler wheel driven by the passing shipping object and assigned to an encoder device is arranged.
This means that simple means can be used to achieve a high level of precision when printing on the shipping objects.

Nachfolgend sind die Funktionen und die Ausbildung einer Ausführung der erfindungsgemässen Frankiermaschine beschrieben.
Zum besseren Verständnis wird dabei auf die Bezugszeichen und Figuren, in denen Ausführungsformen der Erfindung dargestellt sind, Bezug genommen.

1A
vordere Steuerkurve für rechte Gegendruckrolle
1B
hintere Steuerkurve für rechte Gegendruckrolle
2A
vordere Steuerkurve für linke Gegendruckrolle
2B
hintere Steuerkurve für linke Gegedruckrolle
3
Hauptwelle
4
hintere Seitenwand
5
vordere Seitenwand
6A
Gegendruckhebel, links, vorne
6B
Gegendruckhebel, links, hinten
7A
Steuerhebel, links, vorne
7B
Steuerhebel, links, hinten
8A
Gegendruckhebel, rechts. vorne
8B
Gegendruckhebel, rechts, hinten
9A
Steuerhebel, rechts, vorne
9B
Steuerhebel, rechts, hinten
10
Achse für Gegedruckhebel und Steuerhebel
11
Anschlagbolzen für Gegendruckhebel rechts
12
Anschlabbolzen für Gegendruckhebel links
13
Gegendruckrolle rechts
14
Stützrolle
15
Gegendruckrolle links
16A
Schwinge, vorne für Stützrolle
16B
Schwinge, hinten für Stützrolle
17
Achse für Schwinge
18
Federeinhängestange
19
Federeinhängung
20
Zugfeder für Steuerhebel
21
Stützrollenträger mit Tastausleger
22
Schlepphebel
23
Schneckenwelle
24
Schneckenrad
25
Gabellichtschranke
26
Schlitzscheibe
27
Schaltnocke für Hauptwellengrundstellung
28
Mikroschalter
29
Steuerrolle
30
Zugfeder für Gegedruckhebel
31
Gleichstrommotor
32
Antriebsrolle rechts
33
Antriebsrolle links
34
Achse für Gegendruckrolle rechts
35
Anschlag für Schlepphebel
36
Zugfeder für Schlepphebel
37
Anschlag für Tastausleger
38
Tastrad für Inkrementalgeber
39
Niederhalteplatte resp. Führungsteil
40
Antriebsmotor für Vorschub
41
Getriebe für Antriebsrollen
42
Inkrementalgeber, Encoder
43
Ausleger am Stützrollenträger
The functions and design of an embodiment of the franking machine according to the invention are described below.
For a better understanding, reference is made to the reference numerals and figures in which embodiments of the invention are shown.
1A
front cam for right counter pressure roller
1B
rear cam for right counter pressure roller
2A
Front cam for left counter pressure roller
2 B
rear cam for left counter pressure roller
3
main shaft
4
rear side wall
5
front side wall
6A
Counter pressure lever, left, front
6B
Counter pressure lever, left, rear
7A
Control lever, left, front
7B
Control lever, left, rear
8A
Counter pressure lever, right. ahead
8B
Counter pressure lever, right, rear
9A
Control lever, right, front
9B
Control lever, right, rear
10
Axle for counter pressure lever and control lever
11
Stop bolt for counter pressure lever on the right
12
Connecting bolt for counter pressure lever on the left
13
Counter pressure roller on the right
14
supporting role
15
Counter pressure roller on the left
16A
Swingarm, front for support roller
16B
Swing arm, rear for support roller
17
Swingarm axle
18
Federeinhängestange
19
spring suspension
20
Tension spring for control lever
21
Support roller carrier with push arm
22
cam follower
23
worm shaft
24
worm
25
Light barrier
26
slotted disc
27
Switch cam for main shaft basic position
28
microswitch
29
control roller
30
Tension spring for counter pressure lever
31
DC motor
32
Drive roller on the right
33
Drive roller on the left
34
Axle for counter pressure roller right
35
Stop for rocker arm
36
Tension spring for rocker arm
37
Stop for push arm
38
Touch wheel for incremental encoders
39
Hold-down plate resp. guide part
40
Drive motor for feed
41
Gear for drive rollers
42
Incremental encoder, encoder
43
Boom on the support roller support

Beschreibung der Zeichnungsinhalte bei folgenden Figuren

Figur 1
Frontansicht der kompletten Gegendruckmechanik, einschliesslich Antrieb, Tastrad und Hauptwellenantrieb,
Figur 2
Draufsicht auf Gegendruckmechanik,
Figur 3
Frontansicht der kompletten Gegendruckmechanik in Frankierstellung, Gegendruck in oberer Stellung,
Figur 4
Frontansicht der kompletten Gegendruckmechanik in Servicestellung, Gegendruck in unterster Stellung,
Figur 5
Frontansicht, Stellung der Gegedruckhebel/-rollen bei eingelegtem, dickerem Kurzbrief oder von der automatischen Zuführung von rechts einlaufender Brief unter die rechte Antriebsrolle,
Figur 6
Frontansicht, dicker Brief unter allen Antriebsrollen und dem Tastrad,
Figur 7
Frontansicht, dicker Brief hat die rechte Rolle verlassen, die rechte Gegendruckrolle kommt automatisch in die obere Position, mittlere Stützrolle bleibt auf ursprünglichem Höhenniveau. Die linke Gegendruckrolle hat die Höhenabtastung übernommen und
Figur 8
Daufsicht, Antriebsrollen mit Vorschubgetriebe.
Description of the contents of the drawing in the following figures
Figure 1
Front view of the complete counter pressure mechanism, including drive, feeler wheel and main shaft drive,
Figure 2
Top view of counter pressure mechanism,
Figure 3
Front view of the complete counter pressure mechanism in the franking position, counter pressure in the upper position,
Figure 4
Front view of the complete counter pressure mechanism in service position, counter pressure in the lowest position,
Figure 5
Front view, position of the counterpressure levers / rollers with a thicker short letter inserted or from the automatic feed from the right incoming letter under the right drive roller,
Figure 6
Front view, thick letter under all drive rollers and the feeler wheel,
Figure 7
Front view, thick letter has left the right roller, the right counter pressure roller automatically comes to the upper position, the middle support roller remains at the original height level. The left counter pressure roller has taken over the height sensing and
Figure 8
Top view, drive rollers with feed gear.

Bei der Einzelbrieffrankierung 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 drücken das Briefgut gegen die oberen Antriebsrollen. Der Brieftansport resp. der Frankiervorgang werden ausgelöst.
Der Gegendruck besteht aus zwei Gegendruckrollen und einer dazwischenliegenden Stützrolle. Die Gegendruckrollen liegen unter den rechten und linken Antriebswalzen. Die Stützrolle hat die Aufgabe, den Brief unter den Druckköpfen auf dem erforderlichen Höhenniveau zu halten, ohne den Brief gegen die Stimflächen der Drucköpfe zu drücken, damit das Druckbild unverschmiert bleibt. Nach dem Frankieren bewegen sich die Gegendruckrollen und die Stützrolle wieder nach unten und geben den Spalt für das Einlegen eines neuen Kuverts frei.
In the case of single letter franking, the letter is inserted manually into the franking machine. Photocells start the franking process with an exact envelope 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 press the mail item against the upper drive rollers. The letter transport resp. the franking process is triggered.
The counter pressure consists of two counter pressure rollers and an intermediate support roller. The counter pressure rollers are located under the right and left drive rollers. The support roller has the task of keeping the letter under the print heads at the required height level without pressing the letter against the end faces of the print heads, so that the printed image remains unsmeared. After franking, the counter-pressure rollers and the support roller move down again and open the gap for inserting a new envelope.

Ausser der Einlege- und Frankierstellung der Gegendruckrollen und der Stützrolle gibt es noch eine Stellung "Service". In dieser Stellung sind die Gegendruckrollen noch weiter nach unten gefahren um für die Servicestation Platz zu schaffen. Die Servicestation reinigt und verschliesst bei längerer Arbeitspause die Druckköpfe. Ausserdem ist sie für das Füllen der Drucköpfe beim Wechsel des Tintenbeutels erforderlich.Except for the insertion and franking position of the counter pressure rollers and the support roller there is still a position "service". The counter pressure rollers are in this position drove further down to make room for the service station. The Service station cleans and closes the printheads during long breaks. It is also for filling the print heads when changing the ink bag required.

Auf der Hauptwelle 3 sind mehrere Steuerkurven 1A, 1B und 2A, 2B angeordnet, die die Steuerhebel 7A, 7B und 9A, 9B über die Steuerrollen 29 um die Achse 10 schwenkend, je nach notwendiger Position mehr oder weniger anheben bzw. absenken. Die Grundpostion der Hauptwelle 3 wird durch einen über die Steuernocke 27 geschalteten Mikroschalter 28 gefunden. Durch den Motor 31 wird das Schnekkengetriebe 23/24 angetrieben und die Hauptwelle in die Positionen "Briefeinlegen", "Frankieren" oder "Service" gedreht. Die genaue Position wird über eine Gabellichtschranke 25 und die auf der Motorwelle sitzende Schlitzscheibe 26 per elektronischer Steuerung erreicht. Die Gegendruckhebel rechts und links 6A, 6B bzw. 8A, 8B werden durch die an die Steuerhebel 7A, 6B und 9A, 9B angehängten Zugfedern 30 nach oben um die Achse 10 geschwenkt, bis die Gegendruckrollen 13, 15 an den oberen Antriebsrollen 32, 33 anliegen. Die Steuerhebel 7A, 7B und 9A, 9B erreichen ihre Endlagen über die Steuerkurven 1A, 1B und 2A, 2B, was zur Folge hat, dass die Zugfedern 36 noch etwas weiter vorgespannt werden. Die sichere Auflage zwischen den Steuerrollen 29 und den Steurerkurven 1A, 1B und 2A, 2B wird durch die an der Federeinhängestange 18 angehängten Zugfedern 29 erreicht. Die exakte untere Position der Gegendruckhebel 6A, 6B bzw. 8A, 8B wird durch die an den Steuerhebeln befindlichen Anschlagbolzen 11,12 erreicht, die sich auf den Gegendruckhebein nach einem geringen Leerhub abstützen und sie nach unten mitschleppen. Die entsprechenden Positionen sind in den Figuren detailliert dargestellt.A plurality of control cams 1A, 1B and 2A, 2B are arranged on the main shaft 3, the control levers 7A, 7B and 9A, 9B via the control rollers 29 about the axis 10 pivoting, raise or lower more or less depending on the required position. The basic position of the main shaft 3 is via a control cam 27 switched microswitch 28 found. The worm gear is driven by the motor 31 23/24 driven and the main shaft in the "insert letter" positions, "Franking" or "Service" turned. The exact position is determined by a Fork light barrier 25 and the slotted disc 26 on the motor shaft per electronic control achieved. The right and left counter pressure levers 6A, 6B and 8A, 8B are by those attached to the control levers 7A, 6B and 9A, 9B Tension springs 30 pivoted upwards about the axis 10 until the counter pressure rollers 13, 15 rest on the upper drive rollers 32, 33. The control levers 7A, 7B and 9A, 9B reach their end positions via the control cams 1A, 1B and 2A, 2B, which leads to The consequence is that the tension springs 36 are biased a little further. The secure support between the control rollers 29 and the control curves 1A, 1B and 2A, 2B is supported by the tension springs 29 attached to the spring suspension rod 18 reached. The exact lower position of the counter pressure levers 6A, 6B and 8A, 8B is reached by the stop bolts 11, 12 located on the control levers Support on the counter pressure lifting leg after a short idle stroke and adjust it drag along below. The corresponding positions are detailed in the figures shown.

Die in der Mitte befindliche Stützrolle 14, die den Brief auf exakten Abstand zu den Tintenstrahldruckköpfen bringt, sitzt drehgelagert auf zwei Stützrollenträgem 21, die wiederum über zwei ParellePogramm-Schwingen 16A, 16B gelagert sind. Der auf der Drehachse der Stützrolle 14 sitzende Schlepphebel 22 ist in der Achse 34 der rechten Gegendruckrollen 13 eingehängt und muss sich beim Absenken des rechten Gegendruckhebels 6A, 6B zwangsweise mit nach unten bewegen und erreicht das Niveau der rechten Gegendruckrolle. Der Schlepphebel 22 stützt sich über den Anschlag 35 gegen den Stützrollenträger 21 linksdrehend starr ab. Rechtsdrehend kann sich der Schlepphebel 22 gegen die Kraft der Zugfeder 36 vom Anschlag 35 wegdrehen. Dies ist wegen der gegenseitigen Abtastung zwischen rechter und linker Gegendruckrolle erforderlich und wird später noch genauer beschrieben.The center support roller 14, which the letter at an exact distance to the Brings inkjet printheads, is rotatably mounted on two support roller supports 21, which in turn are supported by two ParellePogram arms 16A, 16B. The rocker arm 22 seated on the axis of rotation of support roller 14 is in axis 34 the right counter pressure rollers 13 hooked in and must be when lowering the right counter pressure lever 6A, 6B forcibly move down with and reaches the level of the right counter pressure roller. The rocker arm 22 is supported from the stop 35 against the support roller carrier 21 from left turning rigid. The rocker arm 22 can rotate clockwise against the force of the tension spring 36 turn away from the stop 35. This is because of the mutual scanning between right and left counter pressure roller required and will be more precise later described.

Beschreibung zu den Figuren 1 bis 8:
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 Höchstpunkt erreicht hat. Der mögliche Überhub der Steuerhebel wird durch die gefederte Ankopplung der Gegendruckhebel ausgeglichen. Die Stützrolle 14 hat sich über den Schlepphebel 22 auf dasselbe Niveau eingestellt. Der Brief ist nun zwischen den Antriebsrollen und den Gegendruckrollen eingeklemmt. Der Antriebsmotor 40 (siehe Figur 8) treibt über das Getriebe 41 die Antriebswalzen 31, 33 an und bewegt den Brief von rechts nach links. Die Geschwindigkeits- und Positionsdetektierung erfolgt über den Inkrementalgeber 42 und das Tastrad 38. DasTastrad wird über Reibung vom sich bewegenden Briefumschlag angetrieben und erfasst so die exakte Geschwindigkeit der Briefoberfläche. Der Andruck des Briefes an dasTastrad erfolgt über einen separaten Gegendruck, der später noch gesondert beschrieben ist. In Abhängigkeit von der Briefposition spritzen die Tintenstrahldruckköpfe zellenweise entsprechende Muster ab, die in Folge zu dem gewünschten Druckbild führen. Die Niederhalteplatte resp. Führungsteil 39 hält den Brief auf einen exakten Abstand zu der Druckkopfstimseite um bezüglich Auflösung 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 40 ab und die Hauptweile 3 dreht sich wieder in ihre Grundstellung zurück, die Gegendruckhebel 6A, 6B; 8A, 8B nehmen wieder ihre Ausgangsstellung ein. Ein neuer Brief kann eingelegt werden. Die Hauptwelle 3 dreht sich zwischen der Position "Einlegen" und "Frankieren" immer nur ca. 1/3 Umdrehung vor bzw. zurück, was einen erheblichen Zeitvorteil mit sich bringt und ausserdem die Mechanik schont. Nach einer weiteren 1/3 Umdrehung haben die Gegendruckrollen ihre absolut tiefste Position errecht, wie sie in der Serviceposition (siehe Figur 4) notwendig ist. Zurück in die Grundstellung "Einlegen" ist ebenfalls wieder nur 1/3 Umdrehung erforderlich.
Description of Figures 1 to 8:
The counterpressure levers are ready for inserting a single letter in the basic position. 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 rotates clockwise by about 1/3 of a turn. The control levers 7, 9 are pivoted upward via the control rollers 29 by the control cams 1, 2. The counter pressure levers are also moved upwards via the tension springs 30 until the counter pressure rollers 13, 15 rest against the drive rollers 32, 33. The control levers move a little further until the control curve has reached its peak. The possible overstroke of the control lever is compensated for by the spring-loaded coupling of the counter pressure lever. The support roller 14 has adjusted itself to the same level via the rocker arm 22. The letter is now clamped between the drive rollers and the counter pressure rollers. The drive motor 40 (see FIG. 8) drives the drive rollers 31, 33 via the transmission 41 and moves the letter from right to left. The speed and position are detected by 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. The letter is pressed onto the feeler wheel via a separate counterpressure, which will be described separately later. Depending on the letter position, the inkjet print heads spray corresponding patterns from cell to cell, which in turn lead to the desired print image. The hold-down plate resp. Guide part 39 holds the letter at an exact distance from the print head face side in order to be able to obtain a clean printed image with regard to 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 40 switches off and the main shaft 3 rotates back into its basic position, the counterpressure levers 6A, 6B; 8A, 8B return to their starting position. A new letter can be inserted. The main shaft 3 rotates between the "insert" and "franking" positions only about 1/3 turn back and forth, which brings a considerable time advantage and also protects the mechanics. After another 1/3 turn, the counter pressure rollers have reached their absolutely lowest position, as is necessary in the service position (see Figure 4). Back to the basic position "insert" again only 1/3 turn is required.

In Figur 5 ist die Funktion des Schlepphebels in Verbindung mit der rechten Gegendruckrolle dargestellt. Die Notwendigkeit dieser Funktion ist nachfolgend beschrieben. Ausgangslage ist ein relativ dicker Kurzbrief der manuell eingelegt wird. Die Frankiermaschine löst den Frankiervorgang aus. Die Gegendruckhebel bewegen sich wie beschrieben nach oben. Die Dicke des Kurzbriefes begrenzt den Hub der rechten Gegendruckrolle nach oben. Der Brief wird über die sich aufbauende Federkraft der Zugfeder 19 zwischen oberer, rechter Antriebsrolle 32 und Gegendruckrolle 13 eingeklemmt. Dies ist erforderlich um einen schlupffreien Antrieb gewährleisten zu können. Würde die Stützrolle 14 nicht automatisch über den Schlepphebel 22 auf gleiches Höhenniveau gebracht, könnte das dicke Kuvert zwischen der oben feststehenden Niederhalteplatte resp. Führungsteil 39 und der Stützrolle eingeklemmt werden, was zu Transportproblemen und Druckqualitätsverlust führt. Über den bereits beschriebenen Schlepphebel 22 wird jedoch der Stützrollenträger mit Stützrolle auf das Höhenniveau der rechten Gegendruckrolle gebracht. Der Stützrollenträger bewegt sich parallelogrammförmig synchron mit dr rechten Gegendruckrolle nach unten und das Kuvert kann reibungsfrei die Druckstation passieren.In Figure 5, the function of the rocker arm in connection with the right counter pressure roller shown. The necessity of this function is described below. The starting point is a relatively thick short letter that is inserted manually. The franking machine triggers the franking process. Move the counter pressure levers as described above. The thickness of the short letter limits the stroke the right counter pressure roller upwards. The letter is about to build up Spring force of the tension spring 19 between the upper, right drive roller 32 and counter pressure roller 13 pinched. This is necessary for a slip-free drive to be able to guarantee. Would the support roller 14 not automatically over the The rocker arm 22 brought to the same level, could be the thick envelope between the hold-down plate fixed above. Guide part 39 and the Support roller can be pinched, leading to transport problems and loss of print quality leads. About the rocker arm 22 already described, however Support roller carrier with support roller to the level of the right counter pressure roller brought. The support roller carrier moves in a parallelogram in synchronism with dr right counter pressure roller down and the envelope can smoothly move the printing station happen.

In der nach Figur 6 gezeigten Darstellung ist der dicke Brief auch unter die linke Antriebsrolle 15 gefahren. Der linke Gegendruckhebel musste sich gegen Federkraft ebenfalls nach unten bewegen und hat gleiches Höhenniveau wie die rechte Gegendruckrolle bzw. die mittlere Stützrolle angenommen. Der Anschlag 37 des linken Gegendruckhebels hat mit dem Tastausleger des Stützrollenträgers 21 Berührung aufgenommen.In the illustration shown in Figure 6, the thick letter is also below the left Drive roller 15 driven. The left counter pressure lever had to be against spring force also move down and has the same height level as the right one Counter pressure roller or the middle support roller assumed. The stop 37 of the the left counter pressure lever has contact with the push arm of the support roller support 21 added.

In Figur 7 hat der Brief die rechte Antriebsrolle verlassen und der rechte Gegendruckhebel bewegt sich wieder nach oben, bis die Gegendruckrolle die obere Antriebsrolle berührt. Der Anschlag 37 des linken Gegendruckhebels liegt auf dem Ausleger 43 des Stützrollenträgers 21 auf und hält diesen jetzt auf dem ursprünglichen Höhenniveau. Der rechte Schlepphebel 22 kann linksdrehend ausklappen und der Einhängepunkt der rechten Gegendruckrolle folgen, bis die Gegendruckrolle an der oberen, rechten Antriebsrolle anliegt. Die Höhenabtastung der Stützrolle geschieht im Wechsel zwischen rechter und linker Gegendruckrolle und garantiert so über die gesamte Brieflänge den optimalen, reibungsfreien Abstand zu Druckköpfen und Niederhalteplatte resp. Führungsteil 39.

101
Gegendruckhebel für angetriebenen Inkrementalgeber
102
Drehachse für Gegendruckhebel
103
Anschlagbolzen als Schleppanschlag zu Steuerhebel 105
104
Anschlagkante zum Anschlagbolzen 103
105
Steuerhebel
106
Verbindungslasche für Zwischenräder
107
Verbindungslasche zur Achse der linken Gegendruckrolle
108
angetriebenes Reibrad zum Inkrementalgebertastrad
109
Reibrad zu linken Gegendruckrolle
110
Zwischenrad
111
Zwischenrad
112
Zwischenrad
113
Antriebsrolle links
114
Gegendruckrolle links
115
Getriebe für Vorschubantrieb
116
Zugfeder zwischen Inkremementalgebergegendruckhebel und Steuerhebel
117
Achse der linken Gegendruckrolle
118
Achse für Zwischenrad
119
Tastrad für Inkrementalgeber
120
Gegendruckhebellinks
121
Encoderscheibe
122
Encoder
123
Achse für Encoderscheibe
124
Kugellager
125
Reibpaarung Antriebsrolle 113 und Reibrad 109
126
Reibpaarung Reibrad 108 und Tastrad 119
127
Antriebsrolle rechts
128
Gegendruckrolle rechts
129
Stützrad
130
Brief
131
Achse für Reibrad
In Figure 7, the letter has left the right drive roller and the right counter pressure lever moves up again until the counter pressure roller touches the upper drive roller. The stop 37 of the left counter-pressure lever rests on the extension 43 of the support roller carrier 21 and now holds it at the original height level. The right rocker arm 22 can fold out to the left and follow the mounting point of the right counter-pressure roller until the counter-pressure roller rests on the upper, right drive roller. The height sensing of the support roller takes place alternately between the right and left counter-pressure roller and thus guarantees the optimal, friction-free distance to the printheads and hold-down plate over the entire letter length. Guide part 39.
101
Counter pressure lever for driven incremental encoder
102
Rotation axis for counter pressure lever
103
Stop bolt as a drag stop to control lever 105
104
Stop edge to stop pin 103
105
control lever
106
Connection bracket for idler gears
107
Link to the axis of the left counter pressure roller
108
driven friction wheel to the incremental encoder wheel
109
Friction wheel to left counter pressure roller
110
idler
111
idler
112
idler
113
Drive roller on the left
114
Counter pressure roller on the left
115
Gear for feed drive
116
Tension spring between the incremental counter pressure lever and the control lever
117
Left counter pressure roller axis
118
Axle for idler gear
119
Touch wheel for incremental encoders
120
Counterpressure levers Links
121
encoder disk
122
encoder
123
Axis for encoder disc
124
ball-bearing
125
Friction pair of drive roller 113 and friction wheel 109
126
Friction pair of friction wheel 108 and feeler wheel 119
127
Drive roller on the right
128
Counter pressure roller on the right
129
stabilizer
130
letter
131
Axle for friction wheel

Zeichnungsinhalte bei folgenden Figuren:

Fig. 9
Frontansicht der kompletten Gegendruckmechanik, einschliesslich Antrieb, angetriebenem Inkrementalgeber-Gegendruck, Tastrad und Hauptwellenantrieb. Gegendruckhebel in der Position "manuelles Einlegen",
Fig. 10
Frontansicht der kompletten Gegendruckmechanik, einschliesslich Antrieb, angetriebenem Inkrementalgeber-Gegendruck, Tastrad und Hauptwellenantrieb Gegendruckhebel in der obersten Position "Frankieren",
Fig. 11 + 12
Gegendruckmechanik freigestellt,
Fig. 13 + 14
freigestellte, angetriebene Gegendruckmechanik des Inkrementalgebers,
Fig. 15
Frontansicht, Brief ist unter der rechten Antriebsrolle und hat Tastrad noch nicht errecht, Tastrad wird indirekt über linke Antriebsrolle, Reibräder und Zwischenräder angetrieben,
Fig. 16 + 17
Gegendruckmechanik freigestellt,
Fig. 18
Frontansicht, Kuvert unter beiden Antriebsrollen, Tastrad dirket von Briefoberfläche angetrieben,
Fig. 19
Frontansicht, Kuvert hat rechte Antriebsrolle verlassen, Antrieb erfolgt jetzt über linke Antriebsrolle, Tastrad direkt von Briefoberfläche angetrieben,
Fig. 20
Daufsicht auf koplette Gegedruckmechanik,
Fig. 21
Abwicklung des angetriebenen Inkrementalgebergegedruckes im Schnitt und
Fig. 22 - 24
Details zum Tatrad mit Encoder.
Contents of the drawing for the following figures:
Fig. 9
Front view of the complete counter pressure mechanism, including drive, driven incremental encoder counter pressure, feeler wheel and main shaft drive. Counter pressure lever in the "manual insertion" position,
Fig. 10
Front view of the complete counter pressure mechanism, including drive, driven incremental encoder counter pressure, feeler wheel and main shaft drive Counter pressure lever in the top position "Franking",
Fig. 11 + 12
Back pressure mechanism free,
Fig. 13 + 14
optional, driven counter pressure mechanism of the incremental encoder,
Fig. 15
Front view, letter is under the right drive roller and has not yet reached the touch wheel, the touch wheel is driven indirectly via the left drive roller, friction wheels and idler wheels,
Fig. 16 + 17
Back pressure mechanism free,
Fig. 18
Front view, envelope under both drive rollers, feeler wheel driven directly from the surface of the letter,
Fig. 19
Front view, envelope has left the right drive roller, drive is now via the left drive roller, feeler wheel driven directly from the letter surface,
Fig. 20
Supervision of complete counter pressure mechanism,
Fig. 21
Processing of the driven incremental encoder pressure on average and
Figures 22-24
Details on the Tatrad with encoder.

Wegen der Kurzbriefproblematik und des Platzbedarfes für die Druckköpfe sind bei Druckwerken einer Frankiermaschine, insbesondere einem Inkjet-Druckwerk, Antriebswalzen erforderlich, damit das Kuvert beim Druckvorgang immer unter einer Antriebsrolle geklemmt ist. Die rechte Antriebsrolle treibt das Kuvert beim Einlauf in den Druckbereich an, die linke Walze übernimmt den Antrieb beim Auslauf aus dem Druckbereich. Die Geschwindigkeit- bzw. Positionsüberwachung des Kuverts auf einer der beiden Walzen hätte den Nachteil, dass der Kurzbrief innerhalb eines bestimmten Wegstückes also am Anfang oder am Ende des Kuverts nicht mehr überwacht wäre. Für die Qualität des Druckbildes ist es ausserdem notwendig die exakte Briefgeschwindigkeit zu kennen. Eine Geschwindigkeitsdetektierung auf einer angetriebenen Welle hätte den Nachteil, dass nicht unbedingt die Briefgeschwindigkeit detektiert wird, wenn z.B. der Brief einen Transportschlupf hat bzw. angehalten wird oder wenn ein Stauproblem auftritt. Die Geschwindig-keits- bzw. Positionsüberwachung erfolgt bei dem hier beschriebenen Gerät über ein separates Tastrad, das eine Encoderscheibe direkt antreibt. Die Encoderscheibe bzw. das Tastrad sind genau zwischen den Antriebsrollen, auf Mitte der zwei Druckköpfe angeordnet. Die Signale werden über einen Encoder ausgewertet. Die exakte Startposition beim manuellen Einlegen des Briefes wird von einer Reflexlichtschranke geliefert, die die Position der rechten Briefkante erfasst. Bei automatischer Briefzuführung wird dieses Nullpunktsignal von einer Gabellichtschranke der peripheren automatischen Zuführung geliefert. Ab diesem Startsignal muss das Tastrad die genaue Position des Briefes abtasten. Da der Brief bei manuellem Einlegen bzw. bei automatischer Zuführung das Tatrad bei Nullpunktauslösung noch nicht erreicht hat und deshalb nicht antreiben kann, muss dies für eine kurze Strecke über den angetriebenen Tastengegendruck erfolgen. Der Andruck der angetriebenen Gegendruckrolle an das Tastrad bzw. die linke Antriebsrolle erfolgt über die kurvengesteuerte Mechanik der restlichen Gegendruckhebel bzw. Rollen. Über zwei Reibräder und mehrere Zwischenräder wird die Geschwindigkeit der linken Antriebsrolle auf das Tastrad übertragen. Die linke und die rechte Antriebsrolle sind über ein Stirnradgetriebe fest gekoppelt, so dass die Geschwindigkeit des von der rechten Rolle getriebenen Briefes mit der Geschwindigkeit der linken Antriebsrolle übereinstimmen. Kleine Differenzen spielen hier keine Rolle, da noch nicht mit dem Drucken begonnen wurde. Sobald der Brief -beispielsweise ein Kurzbrief-, angetrieben von der rechten Antriebsrolle, unter das Tastrad gelangt, spielt die Geschwindigkeit des angetriebenen Gegendrucks keine Rolle mehr. Das Tastrad wird über Reibung zwischen Briefoberfläche und Tastradumfang geschwindigkeitsgleich angetrieben. Das zuvor als Reibradantrieb wirkende Gegendruckrad hat jetzt nur noch Anpressfunktion, da sich das Kuvert zwischen die Reibpartner geschoben hat. Abhängig von der Brieflänge bzw. der Labellänge beginnt der Druckvorgang in der dafür bestimmten Briefposition. Entsprechend der jeweiligen Kuvertposition spritzen die Drucköpfe zeilenweise Muster ab, die zum entsprechenden Gesamtdruckbild führen. Nach einer gewissen Wegstrecke verlässt das Kuvert die rechte Antriebsrolle und wird nur noch von der linken Antriebsrollee bewegt. Das Tastrad tastet die Geschwindigkeit bis zum Briefende ab. Zirka 10 mm vor Kuvertende ist der Druck beendet.Because of the short letter problem and the space required for the print heads are at Printing units of a franking machine, in particular an inkjet printing unit, drive rollers required so that the envelope is always under one when printing Drive roller is clamped. The right drive roller drives the envelope in when it enters the pressure area, the left roller takes over the drive at the outlet the print area. The speed and position monitoring of the envelope on one of the two rollers would have the disadvantage that the short letter within one certain path section no longer at the beginning or end of the envelope would be monitored. It is also necessary for the quality of the printed image know the exact letter speed. A speed detection on a driven shaft would have the disadvantage that not necessarily the letter speed is detected if e.g. the letter has a transport slip or is stopped or if a jam problem occurs. The speed or In the device described here, position monitoring is carried out via a separate one Touch wheel that drives an encoder disc directly. The encoder disc or that The feeler wheel is exactly between the drive rollers, on the middle of the two print heads arranged. The signals are evaluated via an encoder. The exact one The starting position when inserting the letter manually is from a reflex light barrier supplied, which detects the position of the right edge of the letter. With automatic This zero point signal is fed by a fork light barrier from the letter feeder peripheral automatic feeder supplied. From this start signal onwards Touch the feeler wheel for the exact position of the letter. Since the letter with manual Insert or, in the case of automatic feeding, the Tatrad when the zero point is triggered has not yet reached and therefore cannot drive, this must be done for a short Distance via the driven button counterpressure. The proof of the driven counter pressure roller to the feeler wheel or the left drive roller via the cam-controlled mechanism of the remaining counter pressure levers or rollers. The speed of the is controlled by two friction wheels and several intermediate wheels transfer left drive roller to the feeler wheel. The left and right drive rollers are firmly coupled via a spur gear, so that the speed of the letter driven by the right roll at the speed of the left drive roll to match. Small differences don't matter here, there are still printing has not started. As soon as the letter - for example, a Brief letter, driven by the right drive roller, gets under the feeler wheel, the speed of the driven back pressure no longer matters. The The feeler wheel becomes the same speed due to the friction between the letter surface and the feeler wheel circumference driven. The counter pressure wheel that previously acted as a friction wheel drive now only has a pressing function, since the envelope is between the friction partners pushed. Depending on the letter length or the label length, the begins Printing process in the designated letter position. According to the respective Envelope position, the print heads line-by-line patterns that correspond to the corresponding one Guide overall print image. After a certain distance that leaves Envelopes the right drive roller and is only left of the left drive roller emotional. The feeler wheel scans the speed until the end of the letter. Around 10 mm before the end of the envelope the printing is finished.

Der Gegendruckhebel 101 des angetriebenen Inkrementalgebers ist auf der an die Seitenwand angenieteten Drehachse 102 drehgelagert. Die Auf- und Abbewegung des Gegendruckhebels erfolgt in Verbindung mit den restlichen Gegendruckhebeln. Diese Funktion wird noch separat beschrieben. Der Gegendruckhebel 101 wird über den eingenieteten Anschlagbolzen 103 und durch die Anschlagkante 104 des Steuerhebels 105 auf bzw. ab bewegt. Der Überhub des Steuerhebels wird bis zum Anliegen des Reibrades 108 am Tastrad 119 über die Zugfeder 116 ausgeglichen. The counter pressure lever 101 of the driven incremental encoder is on the to Side wall riveted axis of rotation 102 pivoted. The up and down movement of the counterpressure lever takes place in connection with the remaining counterpressure levers. This function is described separately. The counter pressure lever 101 will over the riveted stop bolt 103 and through the stop edge 104 of the Control lever 105 moves up and down. The overstroke of the control lever is by The contact of the friction wheel 108 on the feeler wheel 119 is balanced by the tension spring 116.

Das Reibrad 108 ist auf der eingenieteten Drehachse 131 drehgelagert. Über zwei Verbindungslaschen 106, 107 sind der linke Gegendruckhebel 120 und der Gegendruckhebel 101 miteinander drehbar verbunden und garantieren für das Verbindungsgetriebe konstante Achsabstände bei gleichzeitigem Drehfreiheitsgrad. Das Reibrad 109, das auf derselben Achse 117 wie die Gegendruckrolle 114 sitzt, wird von der linken Antriebswalze 113 getrieben (Reibpaarung 125). Über die Stimräder 112, 111, 110 wird das Reibrad 108 mit gleicher Drehzahl angetrieben (Reibpaarung 126). Beim Auslösen der Frankiermaschine heben sich die Gegendruckhebel so weit nach oben, bis die entsprechenden Gegendruckrollen an den Antriebswalzen bzw. dem Tastrad anliegen. Zu Beginn des Frankiervorganges wird der Kurzbrief nur von der rechten Antriebswalze 127 angetrieben und von der rechten Gegendruckrolle 128 angedrückt. Der Antrieb des Tastrades erfolgt bis zu dem Zeitpunkt, an dem das Kuvert zwischen Reibrad 108 und Tastrad 119 gelangt, durch die Getriebekette von der linken Antriebswalze über Reib- und Zwischenräder zum Tastrad. Sobald der Brief unter dem Tastrad 119 ist und von dem Reibrad 108 angedrückt wird, ist für die Umfangsgeschwindigkeit des Tastrades nur noch die Geschwindigkeit der Briefoberfläche von Bedeutung. Dies bedeutet, dass die exakte Briefgeschwindigkeit detektiert wird. Die abtastende Oberfläche des Tastrades (Mantelfläche) kann zur Erhöhung der Griffigkeit aufgerauht, gerändelt oder dgl. sein.The friction wheel 108 is rotatably supported on the riveted axis of rotation 131. About two Linking tabs 106, 107 are the left back pressure lever 120 and the back pressure lever 101 rotatably connected with each other and guarantee for the connecting gear constant center distances with simultaneous degree of freedom of rotation. The Friction wheel 109, which sits on the same axis 117 as the counter-pressure roller 114 driven by the left drive roller 113 (friction pairing 125). Over the spur wheels 112, 111, 110, the friction wheel 108 is driven at the same speed (friction pairing 126). When the franking machine is triggered, the counter pressure levers are raised so far up until the corresponding counter pressure rollers on the drive rollers or the feeler wheel. At the beginning of the franking process, the Brief letter driven only by the right drive roller 127 and by the right Counter pressure roller 128 pressed. The feeler wheel is driven up to the Time at which the envelope arrives between friction wheel 108 and feeler wheel 119 through the gear chain from the left drive roller via friction and idler gears to the feeler wheel. As soon as the letter is under the feeler wheel 119 and from the friction wheel 108 is pressed, is only for the peripheral speed of the feeler wheel the speed of the letter surface matters. This means that the exact letter speed is detected. The scanning surface of the feeler wheel (Shell surface) can be roughened, knurled to increase grip or the like.

Bei der automatischen Zuführung hat der angetriebene Gegendruck des Inkrementalgebers auch noch den Vorteil, dass das Tastrad nicht durch den von der Zuführung einlaufenden Brief beschleunigt werden muss. Dieser Punkt ist bei der manuellen Zuführung nicht von Bedeutung, da alle drehenden Teile gleichzeitig aus dem Stillstand heraus beschleunigt werden.
Das Tastrad 119 sitzt zusammen mit der Encoderschlitzscheibe 121 auf der Achse 123, die mittels zweier Präzisionslaufkugellager gelagert ist. Der Encoder 122 tastet die Signale ab und gibt sie an die Steuerelektronik weiter. Die Qualität der Abtastung der Briefgeschwindigkeit und der Position ist für die Druckqualität von enormer Bedeutung. Die zeitliche Abfolge des Abspritzens der zeilenweisen Druckmuster geschieht in Abhängigkeit der Briefgeschwindigkeit und somit der Briefposition.
In the case of automatic feeding, the driven counter pressure of the incremental encoder also has the advantage that the feeler wheel does not have to be accelerated by the letter arriving from the feeding. This point is not important for manual feeding, since all rotating parts are accelerated from standstill at the same time.
The feeler wheel 119 sits together with the encoder slotted disk 121 on the axis 123, which is supported by means of two precision ball bearings. The encoder 122 samples the signals and passes them on to the control electronics. The quality of the scanning of the letter speed and the position is of enormous importance for the print quality. The chronological sequence of the spraying of the line-by-line printing pattern occurs depending on the letter speed and thus the letter position.

Claims (5)

  1. Franking machine comprising at least one print head of an ink-jet printing unit for printing flat postal items, such as letters or postcards, which can be inserted into or pass through the machine, consisting of a guide part (39) which is arranged around the print head in such a manner that it projects with respect to its nozzle orifice plane and with which a conveying device transporting the postal items between itself and opposing conveying rollers (13, 15) rotating about axes arranged transversely to the conveying direction is associated, the conveying device having two operatively connected drive rollers (32, 33) forming a conveying section together with the guide part and mounted upstream and downstream of the print head as viewed in the conveying direction, and respective reversibly liftable counter-pressure rollers exerting pressure on a drive roller and on a postal item transported therebetween being arranged opposite thereto, characterised in that a follower roll (38, 119) driven by the passing postal item and associated with an encoder device (122) is arranged between the drive rollers (32, 33; 127, 113) in order to monitor the speed and position of a transported postal item or to control the pressure applied to a postal item.
  2. Machine according to claim 1, characterised in that the encoder device (122) is connected to a control unit connected to a computer.
  3. Machine according to one of claims 1 or 2, characterised in that the follower roll (38, 119) is operatively connected to the downstream drive roller (33, 113) in the conveying direction.
  4. Machine according to claim 3, characterised in that a freely rotatably mounted friction wheel (109) which can be operatively connected to the drive roller (33, 113) by means of the counter-pressure levers (6A, 6B; 120) and is concentric with the counter-pressure roller (15, 114) cooperating with the drive roller (33, 113) is provided laterally thereof and drives another friction wheel (126) operatively connected to the follower roll (38, 119) by means of gearing formed by intermediate wheels.
  5. Machine according to claim 4, characterised in that the other friction wheel (126) with the counter-pressure roller (15, 114) is mounted on a multi-part lever (101) and can be displaced towards the follower roll (38, 119) against a spring force.
EP01905559A 2000-02-23 2001-02-22 Franking machine Expired - Lifetime EP1183155B1 (en)

Applications Claiming Priority (3)

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CH345002000 2000-02-23
CH3452000 2000-02-23
PCT/CH2001/000116 WO2001062504A1 (en) 2000-02-23 2001-02-22 Frankiermaschine

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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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EP01905564A Expired - Lifetime EP1200268B1 (en) 2000-02-23 2001-02-23 Franking machine

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US (4) US6910766B2 (en)
EP (4) EP1183155B1 (en)
AT (4) ATE265934T1 (en)
AU (4) AU782071B2 (en)
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ATE277770T1 (en) 2004-10-15
CA2368360A1 (en) 2001-08-30
US20020161728A1 (en) 2002-10-31
US6973433B2 (en) 2005-12-06
EP1200268A1 (en) 2002-05-02
WO2001062506A1 (en) 2001-08-30
CA2368358A1 (en) 2001-08-30
WO2001062504A1 (en) 2001-08-30
EP1183155A1 (en) 2002-03-06
US6910766B2 (en) 2005-06-28
EP1183154B1 (en) 2004-08-11
US20030016981A1 (en) 2003-01-23
US20030158825A1 (en) 2003-08-21
WO2001062503A1 (en) 2001-08-30
AU782071B2 (en) 2005-06-30
US7255422B2 (en) 2007-08-14
WO2001062505A1 (en) 2001-08-30
DE50103192D1 (en) 2004-09-16
AU782136B2 (en) 2005-07-07
AU8156401A (en) 2002-02-28
AU8156101A (en) 2002-02-28
US20030007820A1 (en) 2003-01-09
ATE265935T1 (en) 2004-05-15
AU8156201A (en) 2002-02-28
DE50103845D1 (en) 2004-11-04
ATE265934T1 (en) 2004-05-15
CA2368351A1 (en) 2001-08-30
AU782070B2 (en) 2005-06-30
DE50102184D1 (en) 2004-06-09
US8341094B2 (en) 2012-12-25
DE50102191D1 (en) 2004-06-09
EP1183156B1 (en) 2004-09-29
ATE273138T1 (en) 2004-08-15
AU782076B2 (en) 2005-06-30
EP1183154A1 (en) 2002-03-06
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AU8156301A (en) 2002-02-28
EP1183156A1 (en) 2002-03-06

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