EP1103382B1 - Méthode pour la détermination du nombre d'impressions normales exécutables en utilisant une fonction de gestion de l'encre résiduelle et dispositif pour effectuer cette méthode - Google Patents

Méthode pour la détermination du nombre d'impressions normales exécutables en utilisant une fonction de gestion de l'encre résiduelle et dispositif pour effectuer cette méthode Download PDF

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Publication number
EP1103382B1
EP1103382B1 EP00250398A EP00250398A EP1103382B1 EP 1103382 B1 EP1103382 B1 EP 1103382B1 EP 00250398 A EP00250398 A EP 00250398A EP 00250398 A EP00250398 A EP 00250398A EP 1103382 B1 EP1103382 B1 EP 1103382B1
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EP
European Patent Office
Prior art keywords
ink
prints
franking
normal
microprocessor
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
EP00250398A
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German (de)
English (en)
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EP1103382A3 (fr
EP1103382A2 (fr
Inventor
Ralf Kubatzki
Wolfgang Dr. Thiel
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Francotyp Postalia GmbH
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Francotyp Postalia GmbH
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Filing date
Publication date
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Publication of EP1103382A2 publication Critical patent/EP1103382A2/fr
Publication of EP1103382A3 publication Critical patent/EP1103382A3/fr
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Publication of EP1103382B1 publication Critical patent/EP1103382B1/fr
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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
    • G07B17/00508—Printing or attaching on 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17543—Cartridge presence detection or type identification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17566—Ink level or ink residue control
    • 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

Definitions

  • the invention relates to a method for determining the number of executable with an ink residue normal prints that can be generated by a device with at least one inkjet printhead, according to claim 1 and an arrangement for carrying out the method according to claim 9.
  • the below solution is for the determination the ink supply in ink tank cartridges for postage meters that print with an inkjet printhead and allows the maximum use of the ink until the ink tank cartridge is replaced.
  • Postage meter machines have been known since the twenties and are still being perfected to this day.
  • the printing principle has changed from original purely mechanical solutions with printing drum to electronic solutions with thermal transfer or inkjet printhead.
  • the franking imprint must be visually and machine readable by the postal authorities to verify the postage payment.
  • DE 196 13 944 C1 has already proposed an ink tank cassette with two approximately identically constructed ink containers suitable for the type JetMail® postage meter machine.
  • the one ink tank is for disposal, the ink collected during priming.
  • the other ink tank is for ink supply and has two end electrode end detection but does not provide level information either before or after the end signal.
  • a further proposed hole coding does not provide sufficient protection against the use of an ink tank cassette not authorized by the franking machine manufacturer.
  • An ink end detection with electrodes is previously known from DE 27 28 283 C2.
  • two electrodes for a comparative measurement and a separate electrode for a conductivity measurement for ink end signaling are introduced in the bottom of the ink container.
  • the electrodes are arranged in troughs, which are formed in the container bottom.
  • the prerequisite for the use of such ink end detection is the use of an electrically conductive ink.
  • Such sensors for ink end detection provide the franking machine of the applicant of the type JetMail® for safety's sake, a final signal when a maximum of 200 frankings are possible to avoid an incomplete printed due to lack of ink but billed franking print image.
  • cassette-shaped container with ink liquid, ink ribbon or toner from US 5,365,312, which have a chip-shaped integrated circuit with an electronic memory for a reservoir identifying code for an expiration date and other data and a counter to the consumption at Print by counting the individual pressure pulses to determine which printed ink drops correspond.
  • the integrated circuit stores the current filling status, which can be read out and displayed by the printer controller.
  • reprogramming the chip and refilling the container is not possible.
  • the ink cartridge with chip counts the individual drops and allows use in office printers. The great technical effort of a drop counting is justified but only for printing, where must be expected with very large differences in consumption for various printed images. However, due to the diversity of the print images, no statement can be made about the number of prints still possible with an ink remaining.
  • EP 875 862 A2 has already proposed an ink jet print head for franking machines which carries an integrated ink tank and a connector with many contacts and a chip for storing a head identification number and a number.
  • the number corresponds to the number of maximum possible franking prints, it being possible to frank with the franking machine only if the head identification number is authorized and the maximum number of franking prints has not yet been reached.
  • This solution can only be used for ink-jet franking machines, because in franking, in particular of stacks of mail, a substantially constant ink consumption is attributed. However, only the consumption of ink is indicated here.
  • the user of a postage meter wants to be sure that a billed franking imprint can always be completely printed, i.
  • the counting of the (normal) impressions can here therefore provide no information about the number of possible impressions with the ink residue in the ink tank, because with a small to medium number of frankings per day, the consumption of ink by cleaning outweighs what the number reduced at possible impressions per ink tank filling. Piezo inkjet printheads lose a lot of ink when priming and vacuuming, and can not be returned to the head.
  • the object of the invention is to provide a method for determining the number of normal prints that can be printed with an ink remaining in the ink tank cassette.
  • Four-stroke should be suitable for an ink jet printhead device which must be cleaned at intervals, consuming a quantity of ink that is tolerant.
  • the calculated residual amount of ink should nevertheless deviate so little from the practically available amount at the end of the ink that a final normal print will certainly be completely printed out and that less than that quantity remains in the ink tank cassette needed for a normal print.
  • the invention is based on the recognition that it is of no interest whether the indication of the available quantity of ink at the beginning of the consumption is accurate. Rather, the exact indication of the remaining quantity with the approach to the end of the consumption interests. This can be done after a rough determination of the remaining amount of ink a message about the number of still possible normal imprints. The prerequisite for such a message is the validity of an entered authorization code for an ink tank cassette. The fine mathematical determination the remaining number of Normalabdrucken takes place only after a predetermined amount of ink remaining sensory detected and signaled.
  • the numbers of rinses and taken at different normal imprints are taken into account and that the remaining number is displayed as an integer number of normal imprints.
  • the sensory detected predetermined residual amount of ink is a certain amount of consumption reserve, which allows a predetermined number of Normalabdrucken from the aforementioned time.
  • a cleaning procedure is prevented when the ink consumption is greater than the ink consumption for a normal print.
  • the executable with an ink tank filling the replaced ink tank cartridge normal prints are determined in rough approximation and user-specific by the largest consumers detected and the consumption is converted mathematically or empirically obtained data in the appropriate number of franking imprints.
  • a normalized consumption converted in numbers to pseudo-prints or normal imprints is subtracted from a starting number.
  • the rough determination of the number of executable prints is made user-specifically by multiplying the result of the abovementioned subtraction by a yield factor u.
  • a threshold of signaling be freely programmed as reference value by the user.
  • the use of piracy products or refilled ink tank cartridges eliminates this advantage.
  • the change in the operation of the apparatus may be that the need to change the ink tank cassette is no longer signaled before the reserve quantity is tapped for consumption.
  • FIG. 1 shows an illustration of the user-profile-dependent ink tank yield for the ink tank cassette which is used in the JetMail® type franking machine.
  • a cleaning (priming) of the ink jet print head is automatically performed. If the postage meter machine is often turned on, with little postage stamped, relatively much ink is consumed by cleaning. However, if the number of normal prints per power-on cycle is increased, that is, in the operation period after a power-on, ink consumption by printing increases relative to ink consumption by cleaning.
  • B 360 ml of ink.
  • the quantity Q max coincides with the quantity B in a rough approximation.
  • Such small frankers frank less than 50 letters in the shop each time the postage meter machine is turned on. Due to the large number of cleaning processes, a filled ink tank is sufficient for only about 20,000 normal prints. Few frankers are defined as users who make fewer than 200 letters per duty cycle, ie franking in operation after each turn on the postage meter and still consuming 60% to 80% of the ink for cleaning operations. A filled ink tank then suffices for up to approx. 30,000 normal prints.
  • multi-franking refers to users who create more than 1000 letters per duty cycle, ie frank in operation after each time the franking machine is switched on. Since only 20% to 30% of the ink is consumed for cleaning operations, a filled ink tank will suffice for well over 60,000 normal prints.
  • the curve in FIG. 1 results from the empirical values of a statistical examination.
  • the latter also provides initial values for the approximate calculation of the residual ink quantity and the resulting number of possible frankings.
  • the amount of ink consumed for a total of franking simply corresponds to the sum of all normal prints A multiplied by the average amount of ink q consumed per single franking [in ml].
  • B Q Max + ⁇ A * q [ in ml ]
  • the quantity of ink Q max can be converted into a number of dummy prints A 'which are produced by the cleaning operations for franking get lost.
  • the difference D which results from the equation (1), can then be converted into a number of normal prints, being rounded off to whole normal prints.
  • the difference D is divided into a sum of dummy prints A 'and sum of normal prints A according to the user-specific behavior and a negligible ink residue here: ( ⁇ A ' + ⁇ A ) q ⁇ B - Q [ in ml ]
  • the invention now allows the better utilization of this residual amount by a more accurate determination of a residual amount of possible normal prints due to a residual amount of ink in an ink tank, which incorporates both the previous end sensor and based on a more accurate calculation of the ink consumption.
  • FIG. 2 shows a representation of the rear side of an ink tank cassette of the Jetmaif® type franking machine.
  • An ink tank container 955 of the ink tank cartridge 95 holds approximately 360 ml of ink and serves to supply ink. It is equipped with a pair of electrodes 93,94.
  • An attached sensor 92 provides an ink end signal when the ink tank is empty except for a remaining amount. If now signalisert that the level to be detected falls below, then authorized by the manufacturer ink in the ink tank for ink supply who refilled the. This can be done for example via a hollow needle or syringe through a rubber seal 957 in the rear wall of the ink tank cartridge.
  • Hole coding has holes 951 and holes capped with lid 952. Alternatively to the lids, a perforation of the intact back wall can take place. The hole coding protects against confusion with ink tank cassettes that are filled with an ink of a different color. Lateral grooves 958, 959 provide guidance during insertion of the ink tank cartridge.
  • FIG. 3 shows a circuit diagram of a detector which reliably detects the removal or replacement of the consumable even when the device is switched off and is not supplied with system voltage U s .
  • the detector has a commercial lithium battery BAT, which supplies a memory with a memory retention voltage of about 3V.
  • a first switch S1 is operated when removing or changing the consumable. For example, a mechanical contact is opened, which interrupts the power supply of the memory by the lithium battery BAT. This voltage supply is detected and causes the closing of a second switch S2, which is preferably realized as a CMOS circuit.
  • the memory may be formed as SRAM, which can be equipped by the microcomputer 19 via the interface 18 by means of a - not shown - shift register with a code and can be queried for the presence of the code.
  • the data request for a removal or replacement of the ink tank cassette symbolized by d1, d2 can be supplemented by a data query regarding a mating of the ink tank cassette symbolized by d3.
  • a mechanical contact or first switch S1 which produces the power supply of the memory by the lithium battery BAT, is closed when the cassette is inserted.
  • the voltage level of the lithium battery BAT can be queried via d3 and window comparators (not shown).
  • the type of aggregation of the consumable with the codeword preferably depends on the type of consumable. It is intended a sensor, directly or indirectly, permits the presence of consumables to be determined by a physical action principle, the consumable being a solid body.
  • the consumable is the ink in an ink tank cartridge for a postage meter of Fig. 4.
  • FIG. 4 In the perspective view of a franking machine of the JetMail® type illustrated in FIG. 4 from the right, there is an internal data connection to the integrated balance 20.
  • an automatic feed 3 with an integrated separating device is arranged upstream of the franking machine 1.
  • a pressure strap 35 can be folded up and then presses on a mail stack, from which 32 letters are separated by means of take-off rollers.
  • Under a hood 34 are more parts of the separating device.
  • a letter abuts on a guide plate 31 and is moved downstream to the guide plate 11 of the postage meter 1, where the printing operation called "franking" takes place.
  • a further moved franked letter is applied to a guide plate 81 of a closing module 8.
  • a closing roller pair 82 ensures the closing of not yet completely closed envelope and for ejection via an insert 5 in the storage box 6.
  • a chip card disk / reader unit 70 and an on-off switch 71 are arranged in the guide plate 11 of the franking machine 1. After switching on, a chip card 10 can be used in conjunction with the user interface 43, 45 for simplified setting of the franking machine.
  • the user interface 43, 45 is located on the meter 12 of the franking machine 1.
  • DE 298 21 903 U1 an internationally usable user interface has been explained in more detail.
  • a microprocessor of the franking machine 1 monitors the fill level of an ink tank 95 shown in FIG. 5 by means of an ink end sensor 92.
  • the latter can be in contact with two electrodes according to German Patent 196 13 944 C1.
  • German Patent 196 13 944 C1 As a precautionary measure, such sensors already provide a final signal in the JetMail if a maximum of 200 frankings are still possible in order to avoid a franking imprint printed incompletely because of lack of ink.
  • the microprocessor If necessary, the microprocessor generates a display text for display in the display 43: THE INK PRESET IS ALMOST USED. PLEASE REPLACE THE TINTANT TANK AS SOON! RESERVE IN PRINT: 200.
  • the franking machine 1 can now continue to be operated with the reserve ink quantity.
  • the microprocessor realizes in its memory space a backward counter, which is preset by the ink end signal to the number 200 and decremented by one with each additional franking.
  • the number 200 results empirically from empirical values for a balance of possible normal imprints and a safety factor.
  • the number indicating the remainder can be displayed before the next franking.
  • a remainder of possible impressions can be more accurately determined when starting from the aforementioned equation (5). The more accurate calculation will be explained in more detail with reference to FIG.
  • the microprocessor After each further franking, the microprocessor generates a status line which indicates the number of remaining prints and issues the message at the end: THE INK ADVANTAGE IS REPLIED. PLEASE CHANGE THE TINTANCE TANK.
  • the used ink tank 95 can be removed and inserted into a plastic bag, which catches any leaking ink residues.
  • a new ink tank can be removed from the packaging to verify that the color of the ink is correct. For this purpose, a hole coding on the back of the ink tank can be used. At the same time the new codeword will be read.
  • the ink tank is inserted into lateral guide rails (not shown) of the ink tank compartment and pushed in until it noticeably engages.
  • the microprocessor If the ink tank is not inserted correctly, the microprocessor generates the message: PLEASE CHANGE THE TINT TANK! When docking the new consumables, a contact is automatically closed. The postage meter recognizes through this contact that a new consumable has been installed. Depending on a hole coding on the back of the ink tank, the original ink type (post red, red florescent, post blue, etc.) can be detected by means of suitably designed contacts. The microprocessor will now generate a message prompting the customer via the display to enter the new code: PLEASE ENTER THE TINT TANK CODE. For example, the customer can take this code from an imprint on the packaging and enter it in the franking machine 1 by means of the keyboard 45.
  • the franking machine 1 has the new code
  • a connection with the data center of the manufacturer is made.
  • Today, modern franking machines are all equipped with a modem in order to be able to communicate with the data center of the manufacturer. This is normally used to load a credit amount from the data center if the corresponding storage has been franked.
  • the transmission of the code may be done separately as soon as the new consumable has been identified or may be an additional component of the communication to periodically load the postage meter at a later time.
  • Known measures of data protection are used to prevent the code on the transmission link can be borrowed.
  • the data center receives the code of the new consumable 95 along with an identifier of the postage meter 1.
  • the code comparison performed in the remote data center 100 also checks to see if the code has already been used once. Has he been reported by another postage meter has obviously their users are passing the code and the new customer is trying to use unauthorized supplies in combination with that code. If the customer has already given the code before, this is an indication that he has now taken possession of unauthorized after using authorized consumables.
  • the authorization can be checked in the device itself, which will be explained below with reference to FIG.
  • FIG. 6 shows a block diagram of a JetMail® type franking machine with a control unit 40 to 58 having a processor 46 and with a base including an integrated balance 20, a rate PROM 22, a modem 53 and such a detector 96.
  • the rate PROM 22 may alternatively be implemented in the dashed memory module 51, 52 within the meter.
  • the detector 96 recognizes the change or use of a new ink tank cassette 95 according to a direct measuring method. It is also provided that by means of existing sensors 92, 97 in cooperation with an evaluation of measured and stored data carried out by the microprocessor 46 the presence of an exchanged ink tank cassette is determined according to a physically active principle.
  • a predetermined remainder of ink is detected by means of the electrodes 93, 94 and the sensor 92 and communicated via the modules SAS 59, sensor / actuator control interface ASIC 58 to the microprocessor 46, which then generates a display. There remains a predetermined remainder of ink which is sufficient for about 200 impressions when the conductivity between the contacts 93, 94 falls below a predetermined threshold. Switching the franking machine 1 off / on via the switch 71 can be detected via the sensor 97, which is likewise connected to the SAS 59. In cooperation with an evaluation of measured and stored data carried out by the microprocessor 46, the presence of an interchangeable ink tank cassette 95 is indirectly determined.
  • a security module 60 developed by the applicant serves as the first charging module and has a hardware accounting unit 63 and a battery-powered nonvolatile memory 61 in which a credit can be loaded by modem 53.
  • An OTP (One Time Programmable) processor 66 executes security routines both during the credit debit, as well as to secure the register data with a MAC (Message Authentication Code).
  • the advantage of the security module is that the verification of the reliability and approval of the franking and franking machine according to the invention, which is carried out by the mail carrier, then only for the relevant processor system 60 and the connected printer module 55-57 is required.
  • a second processing module forms the smart card 10 in conjunction with the smart card write / read unit 70.
  • the microprocessor 46 and the first memory devices 41, 42 then form a third processing module and the microprocessor 46 and the second memory devices 51, 52 (dashed) then form a fourth processing module, and so on.
  • one abandon module is sufficient and the other processing modules can perform other tasks.
  • the microprocessor 46 with associated memory is used as a postage computer and for printing control and the abort module 60 for accounting and calculation of encryption codes at least for communication with the data center for the purpose of credit recharge. Due to this division of tasks, the bill module 60 has been further developed into the security module. All of the processing modules 41, 42, 51, 52, the security module 60, the microprocessor 46, the interface assemblies 44, 54 and 55, a main memory pixel RAM 47, clock / date module 48, cliché EEPROM 49, program memory ROM 50 and ASIC with the sensor / actuator control interface 58 are connected to a meter-internal BUS 40 of the controller. By means of the keyboard 45 an input is made to the ports of the microprocessor 46 for the corresponding control of the franking machine 1.
  • a generated screen image can reach the display 43.
  • the display has an integrated controller for support.
  • Both interface circuits 54 and 58 can also be implemented in a user circuit ASIC. Further details can be found in EP 716 398 A2, which bears the title: franking machine-internal interface circuit and method for tamper-proof print data control.
  • EP 875 864 A2 which bears the title: Arrangement for communication between stations of a mail processing machine.
  • the letter transporting motor M1, the stripper type motor M2, and the letter closing motor motor M6 there are a motor M3 for the swing mechanism, a motor M4 for a wiper blade, and a motor M5 for an ink pump.
  • a beeper 15 and RDS position sensors Connected to the SAS 59 are a beeper 15 and RDS position sensors which monitor the movement of the Motor M3 for the swing mechanism and thus the movement of a RDS 17 notice.
  • the beeper 15 briefly signals a malfunction, such as pulling the power plug when the print head is not sealed. It uses very little energy for signaling.
  • the print head is sealed when a sealing cap of the RDS 17 Cleaning and Sealing Station is raised to a sealing position.
  • the latter is not the case in the franking mode, since the print head has been pivoted into a franking position.
  • Cleaning of the printhead is done in conjunction with the control of the three motors M3, M4, M5 mentioned above. Cleaning involves passing through the phases of suction, wiping and free spraying, wherein the passage through the operation of the motor M3 is realized by means of a special mechanism. After a negative pressure has been generated by turning on the ink pump motor M5, a valve 18 is opened by the swing mechanism and sucked a predetermined amount of ink by a priming time period.
  • the sealing cap After priming, the sealing cap is lowered into a wiping position and by driving the motor M4 for the wiper lip, the printhead is wiped. After switching off the ink pump motor M5 is still a free spraying by the piezo actuators of the print head are driven with pulses for a predetermined period of time. If there is no print job, the RDS is docked and the valve 18 is closed.
  • the structure and operation of the RDS 17 has been described in more detail in the German patent DE 197 26 642 C1 entitled: Apparatus for positioning an ink jet printhead and a cleaning and sealing device.
  • FIG. 7 shows a flow chart for the above franking machine.
  • the system routine 200 is reached.
  • the serial interfaces for example interface 54, are selected and queried and further stored data is called up.
  • branching is made to step 209, possibly via further steps (not shown).
  • an input and display routine whereby the input possibilities of the User interface are specified via the screens, more data and commands are entered.
  • An input may be recognized as a communication request in query step 301, whereupon a communication routine 300 is run through before branching back to point e.
  • the command to enter a test mode 213 is detected in a query step 212.
  • the command to enter a display mode 215 is recognized in a query step 214.
  • the print head heating is switched off, the RDS 17 is docked and the valve 18 is closed in a step 217.
  • step 227 the printhead heater is turned off, the RDS 17 is docked, and the valve 18 is closed. Subsequently, a branch back to the system routine via a display step 228. Otherwise, branching is made to a point a for the next interrogation step.
  • query steps 220, 222, 224 are passed, which trigger a cleaning of the ink print head.
  • Query step 224 queries if a command has been entered to initiate intensive cleaning.
  • step 226 In the case of intensive cleaning, the number of which is counted separately in step 225, a branch is made to query step 226. In the latter, it is queried whether the above-mentioned command has been entered again so often in succession that a number Pmax is exceeded. In such a case, in which a multiple cleaning was unsuccessful, the heater is turned off in step 227, the RDS 17 docked and the valve 18 is closed. A step 228 for generating a display "CALL SERVICE" branches back to the system routine 200. Otherwise, an intensive cleaning is triggered, which differs in duration from the others.
  • a branch is made to a step 223, in which the heating is switched on, the RDS 17 is docked and the valve 18 is closed.
  • the cleaning of the print head takes place in step 229 and has already been explained in connection with FIG.
  • a step 230 first, the remaining amount of remaining ink is considered, taking into account at least the cleaning time or intensity Current residual number M act converted to normal imprints and then displayed.
  • the remaining number K of impressions must be calculated more accurately only after the presence of an ink end signal, ie at a low ink level.
  • a value H is subtracted from a starting number c2.
  • the value H is normalized consumption converted into units of pseudo-printing or normal imprints, which is stored before the calculation of the remaining number of residues.
  • normal cleaning results in twice as much ink consumption as compared to easy cleaning
  • An initial cleaning which leads to an initial filling of a printhead with ink, may possibly be taken into account in the postage meter machine by means of a changed start number c2.
  • the yield factor u takes into account that only a fraction of the number (c2 - H) is used directly to produce impressions.
  • the user-dependent yield factor u must be stored during initial initialization of the franking machine and lies in the range between 0.1 and 0.8.
  • a high factor u 0.8 applies here to a user who has been referred to in the explanation of the curve according to FIG. 1 as a multi-receiver.
  • FIG. 8 shows a flow chart for the franking mode 400 with a billing and printing routine for the JetMail® type franking machine.
  • the determination of a number of normal prints corresponding to a remaining ink remaining is done by the microprocessor 46. If the RDS 17 is not docked (step 401) and the printhead heater is turned on (step 406), the microprocessor 46 starts a calculation of the print image (step 408). Otherwise, if it has been determined in the interrogation step 401 that the RDS 17 is docked, a step 402 is shown. In the latter, the printhead heater is turned on, the RDS is moved to a wiping position and the valve 18 is opened. Then there is a free spraying.
  • step 403 If an ink end signal is present, which is queried in step 403, the microprocessor 46 calculates a number K of normal prints in step 404, which can still be executed after the free-spraying. Thereafter, and if there is no end of ink signal, microprocessor 46 drives motor M3 to step 405 to lower the RDS 17 to the depth of the base and pivot the printhead to the print position. The reached position is detected in step 405 via RDS position sensors 16. Subsequently, branching is made to step 408 to calculate the printed image. During the calculation of the print image by the microprocessor 46, the security module 60 is activated.
  • a piece count credit S> 0 is present after a register check 412 (query step 411) and the check yields proper unmanipulated register data (query step 413), a signature is calculated for the impression (step 416), the printed postage value (step 417) and incrementing the lottery credit (step 418). Otherwise, the OTP processor of the security module 60 switches to statistics and error evaluation (step 414) and generates an indication (step 415) to then branch back to the system routine s.
  • the steps 403, 404, 421, 422, 423 required to determine a number of prints corresponding to a remaining amount of ink still available are part of the aforementioned accounting and printing routine. To roughly determine a number of normal prints, only one increment of the number N is required in step 421. Prior to finely determining a number K of prints, the ink end signal must have been delivered, which is queried in steps 403 and 422. The starting value for K is the remaining number c1. The value K is used to subtract the consumption which can be exactly determined according to equation (6) as a numerical value. The consumption is entered into a pseudo-print number W / 6 for a free-spraying in step 404 and a number Z for an impression in step 423.
  • step 423 Starting from step 423 and if no ink end signal has been issued, which is queried in step 422, then, when the print head is in print position, which is queried via a query step 424, the print engine 426 is reached.
  • the print data passes via the interface 55 and the print controller 56 to the print head 57.
  • An error message is generated in step 425, if it was determined in the latter query that when the print head is not in the print position. Finally, it branches back to the system routine. Between the points a and b of the flow chart according to FIG. 7, further interrogation steps may be present.
  • a not shown polling step results in a step of generating a signaling or warning before the ink tank cartridge needs to be changed.
  • a numerical threshold I on residual normal imprints for a warning / signaling may be preprogrammed by the user by means of the input and print routine 109.
  • the current residual number M akt at still possible frankings with normal pressures can be found in Display mode 215 are displayed when a corresponding input has been made in the input and print routine 109. If the value M akt ⁇ I, however, a signaling or warning occurs independently of this.
  • the other query steps are those that are important in the context of the ink tank cartridge authorization.
  • Figure 9 shows a flow chart for detecting the change of the ink tank cartridge in a postage meter machine.
  • a is a query step 241, which refuses to another query step 242 if the user has just reentered an invalid authorization code.
  • the further query step 242 asks if an old code has been entered. If no old code has been entered, then a branch is made to a step 244 to store the information, whereby the postage meter recognizes that it is suspicious to work with other than original inks. However, if an old code has been entered, then a query step 243 is branched to store the information in step 244 if the condition M akt ⁇ 1 is met.
  • the query step 243 and the query step 241 branches to a query step 245, from which another query step 246 is denied if the user has just reentered a valid authorization code.
  • the other inquiry step 246 it is asked whether the ink tank cassette 95 is inserted. If this is not the case or if no authorization code has been entered and the ink tank cassette 95 is not plugged in, then a branch is made to step 250 in order to generate a display text "REPLACE PLEASE TINT TANK". If it is determined in the inquiry step 246 that the ink tank cassette 95 is inserted, then a query step 248 is branched and asked whether an alternating signal is emitted from the detector 96.
  • step 250 the process branches back to step 250 in order to generate a display text "PLEASE CHANGE TINT TANK". Otherwise, if an alternating signal is emitted from the detector 96, then sets the Microprocessor 46 in step 247, the remaining number M akt to the initial value c2 and sets the detector 96 in a state in which no change signal is delivered. The entered authorization code is stored as old code. If it is determined by the inquiry step 249 that the ink tank cassette 95 is not inserted, the step 250 is refrained. Otherwise, a query branch 251 is made if yes.
  • a branch is made to a query step 252 and a request is made as to whether an ink end signal is being output from the sensor 92. If this is the case, then the system branches back to step 250 in order to generate a display text "PLEASE CHANGE TINT TANK". Otherwise, a branch is made to step 253 to generate a display text "ENTER PLEASE TINTENTANK CODE".
  • the initial state c2 for the postage meter having a maximum count of the remaining number M is again present because the ink tank cassette has just been replaced with an ink tank cassette 95 filled with original ink of an authorized manufacturer.
  • the ink tank cassette 95 When branching to the step 253, the ink tank cassette 95 has been put back after being taken out of the ink tank compartment and is to be reused, for example, because it is not yet empty. If the old authorization code is then input upon request, the above-mentioned reuse is suspect if the current roughly calculated residual number M akt ⁇ 1. In fact, in such a case, ie if the ink tank cartridge had not been tampered with by an unauthorized refill, an ink end signal would have been required. From steps 244, 247, 250 and 253, the system routine 200 branches back.
  • the microprocessor 46 may distinguish the input of an authorization code from other data inputs. It can also compare a stored old code with the entered one.
  • the franking machine leads into
  • the authorization check itself or in another variant uses a communication with the data center for authorization check.
  • the codeword is printed on the ink tank cassette or on a label attached to the latter.
  • the authenticity of a cassette filled with original ink can be checked.
  • further interrogation steps not shown are required. After passing through the interrogation steps 241, 245, 249 and 251 of the subflow plan shown in FIG. 9, the point b is reached again.
  • FIG. 10 shows a partial flow chart for determining a yield factor u.
  • the user-dependent yield factor u can be determined.
  • Each determined mean value V m can be assigned a u-factor in a list.
  • the list can be stored in the ROM 50. It suffices to count the respective current number V of frankings per duty cycle.
  • the measured values which have been stored more than three switch-on cycles and which were stored in step 262 are deleted or overwritten in step 263 beforehand.
  • the display 43 and the input means 45 form a User interface 4, via which a threshold value of the signaling as a reference value is freely programmable by the user and stored in the memory means 41, 42 via microprocessor 46.
  • the storage means 41, 42 are equipped to store at least one threshold value in a memory area.
  • the microprocessor 46 is programmed by a program in the memory 50 to compare the determined number of normal-prints executable with an ink residue with the reference value, and when the reference value is reached or undershot, generate a signal for the need to change the ink tank cassette again.
  • the microprocessor 46 is further programmed to alter the operation of the device if the verification of the authorization code has been invalidated, the change in operation of the device being that the need to change the ink tank cartridge is not signaled in advance.
  • the codeword can be considered a manufacturer's certificate that guarantees the quality of the ink it contains.
  • the certificate is issued in the form of an electronically readable signature from the manufacturer, away from the data center, which has a so-called signing key, and the data center database has a verification key.
  • the identity number of the ink and the quantity sold are encrypted with the signing key by the manufacturer for signature and printed as codeword.
  • a message containing the identity number of the ink, the amount, possibly the date and the signing key can be transmitted to the data center, which upon receipt of the information transmits a verification key with which the postage meter machine can verify a multiplicity of filled or refilled ink tank cassettes.
  • verification or authorization check is performed only in the data center. It is also possible that such checks are performed in both the data center and the postage meter.
  • the rough computational determination and display of the number of executable normal imprints prior to a time at which the predetermined amount of ink remaining detected by the sensor 92 is signaled is particularly advantageous for users belonging to the group of middle and multiple frankers.
  • the order of a new ink tank cassette must be timely, since a remainder of 200 normal imprints is quickly consumed.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ink Jet (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (18)

  1. Procédé de détermination du nombre d'impressions normales réalisables avec une quantité restante d'encre, qui peuvent être générées par un appareil avec au moins une tête d'impression à jet d'encre (57), le nombre de pages encore imprimables étant déterminé (423) dans l'appareil à partir d'un moment, où un capteur (92) signale (218) une quantité d'encre réduite, caractérisé en ce que lors de la détermination par voie de calcul, les nombres de nettoyages effectués à partir du moment susmentionné et de diverses impressions sont pris en considération et en ce que le nombre restant est indiqué (219) sous la forme d'un nombre entier d'impressions normales.
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité restante d'encre prédéterminée acquise par capteur est une quantité de réserve destinée à être consommée, qui permet un nombre prédéterminé c1 d'impressions normales, en ce qu'à partir du moment susmentionné, une procédure de nettoyage avec une consommation d'encre qui est supérieure à la consommation d'encre pour une impression normale est empêchée et en ce qu'une détermination précise par voie de calcul du nombre d'impressions normales réalisables avec la quantité restante d'encre s'effectue à compter du moment susmentionné.
  3. Procédé selon la revendication 1, caractérisé en ce qu'une détermination approximative par voie de calcul du nombre s'effectue après enregistrement d'un code d'autorisation valide entré pour une cartouche de stockage d'encre avant une détermination précise par voie de calcul du nombre à partir du moment, où la quantité restante d'encre prédéterminée acquise par capteur est signalée en tant que réserve pour l'impression d'un nombre prédéterminé.
  4. Procédé selon la revendication 3, caractérisé en ce qu'une consommation normalisée convertie en nombres de pièces H de pseudoimpressions ou d'impressions normales est soustraite d'un nombre initial c2 et en ce que la détermination approximative du nombre d'impressions normales réalisables s'effectue de manière spécifique à l'utilisateur, en multipliant le résultat de la soustraction susmentionnée par un facteur de rendement u.
  5. Procédé selon la revendication 4, caractérisé en ce que le facteur de rendement u est préprogrammé pour la détermination approximative spécifique à l'utilisateur du nombre.
  6. Procédé selon la revendication 4, caractérisé en ce que le facteur de rendement u est établi pour la détermination approximative spécifique à l'utilisateur du nombre au cours de l'exploitation de la machine à affranchir à partir d'une liste mémorisée au moyen d'un nombre moyen Vm d'affranchissements par cycle de mise en marche E, le nombre V d'affranchissements étant acquis pour un nombre de cycles de mise en marche E et le nombre moyen Vm étant déterminé à partir de cela.
  7. Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce qu'une détermination approximative du nombre s'effectue de manière spécifique à l'utilisateur et en ce que dans le cas d'un nombre prédéterminé d'impressions normales réalisables, la nécessité de changer la cartouche de stockage d'encre est signalée avant que la quantité de réserve ne soit utilisée pour consommation.
  8. Procédé selon l'une quelconque des revendications 3 à 7, caractérisé par la constatation d'un changement de la cartouche de stockage d'encre (95), pour laquelle un code d'autorisation ou une carte à puce correspondante (10) avec un code d'autorisation est mis à disposition, et par une vérification de la validité du code d'autorisation, après qu'il ait été entré au moyen de la carte à puce (10) ou en utilisant l'interface utilisateur (4).
  9. Disposition destiné à la réalisation du procédé selon la revendication 3, comportant une unité de commande d'un appareil, des moyens d'entrée (10, 45), une tête d'impression à jet d'encre (57) et un poste de nettoyage et d'étanchéité (17) ainsi qu'un capteur (92) destiné à signaler lorsqu'une quantité restante prédéterminée est atteinte, le capteur (92) signalant la quantité restante prédéterminée, qui est utilisée pour consommation en tant que quantité restante, le capteur (92) et d'autres moyens (96, 97) destinés à constater la présence d'une cartouche de stockage d'encre remplacée et des moyens d'entrée (10, 45) destinés à entrer un code étant reliés de manière opérationnelle à l'unité de commande de l'appareil, et un microprocesseur (46) étant relié à des moyens d'enregistrement (41, 42 et 50) dans l'unité de commande de l'appareil et programmé
    - afin de la déterminer approximativement par voie de calcul le nombre d'impressions normales réalisables avec une quantité restante d'encre et afin de le signaliser avant un moment, où la quantité restante d'encre prédéterminée acquise par le capteur (92) est signalée en tant que réserve,
    - afin de générer une communication après une reconnaissance du changement de la cartouche de stockage d'encre, et de l'afficher via écran de visualisation (43) et d'attendre l'entrée d'un code au moyen de moyens de saisie (10, 45),
    - afin de procéder à une vérification du code entré en vue de l'autorisation de la cartouche de stockage d'encre changée et d'altérer le fonctionnement de l'appareil, lorsque la vérification effectuée du code s'est révélée non valide.
  10. Disposition selon la revendication 9, caractérisé en ce que l'écran de visualisation (43) et les moyens d'entrée (45) forment une interface utilisateur (4), par l'intermédiaire de laquelle une valeur de seuil de la signalisation est librement programmable par l'utilisateur en tant que valeur de référence et est enregistrée dans les moyens d'enregistrement (41, 42) via microprocesseur (46).
  11. Disposition selon l'une quelconque des revendications 9 et 10, caractérisé en ce que les moyens d'enregistrement (41, 42) sont équipés afin d'enregistrer au moins une valeur de seuil dans une zone de mémoire et en ce que le microprocesseur (46) est programmé dans la mémoire (50) grâce à un programme, afin de comparer le nombre déterminé d'impressions normales réalisables avec une quantité restante d'encre avec une valeur de référence et afin de générer un signal pour la nécessité de changer de nouveau la cartouche de stockage d'encre lorsque la valeur de référence est atteinte ou que l'on passe en dessous.
  12. Disposition selon l'une quelconque des revendications 9 à 11, caractérisé en ce que le microprocesseur (46) est programmé afin de signaler à l'avance la nécessité de changer de nouveau la cartouche de stockage d'encre en cas de code d'autorisation valide, avant que la quantité de réserve ne soit utilisée pour consommation et afin d'altérer le fonctionnement de l'appareil, lorsque la vérification effectuée du code d'autorisation s'est révélée non valide, l'altération du fonctionnement de l'appareil résidant en ce que la nécessité de changer la cartouche de stockage d'encre n'est pas signalée à l'avance.
  13. Disposition selon la revendication 9, caractérisé en ce que le moyen de constatation de la présence d'une cartouche de stockage d'encre remplacée est un détecteur (96), qui détecte une interruption de la présence et enregistre de manière non volatile.
  14. Disposition selon la revendication 9, caractérisé en ce que des capteurs disponibles (92, 97) sont les moyens de constatation de la présence d'une cartouche de stockage d'encre remplacée, la présence d'une cartouche de stockage d'encre remplacée étant constatée indirectement en coopération avec une exploitation de données mesurées et enregistrées réalisée par le microprocesseur (46).
  15. Disposition selon la revendication 9, caractérisé en ce qu'un capteur (92) et des contacts (93, 94) reliés de manière opérationnelle au microprocesseur (46) sont prévus dans le réservoir de la cartouche de stockage d'encre (95) en vue d'identifier le changement de la cartouche de stockage d'encre (95), la conductivité électrique de l'encre étant mesurée entre les contacts (93, 94) et la présence d'une cartouche de stockage d'encre (95) remplacée étant établie indirectement en coopération avec une exploitation de données mesurées et enregistrées réalisée par le microprocesseur (46).
  16. Disposition selon la revendication 9, caractérisé en ce que l'appareil est une machine à affranchir (1), en ce qu'un enregistrement du nombre de pièces d'impressions normales ou d'affranchissements s'effectue au cours de l'exploitation et en ce que le microprocesseur de la machine à affranchir identifie un changement non autorisé par l'intermédiaire du décalage entre le nombre d'affranchissements admissibles établi à compter de l'entrée du code d'autorisation et le rendement d'affranchissement réel et fournit des données en vue de la transmission de données au centre de données Teleporto (TDC).
  17. Disposition selon la revendication 16, caractérisé en ce que le centre de données (100) est doté d'une banque de données (110) et de moyens dans le serveur en vue de la vérification du code d'autorisation et présente des moyens pour vérifier si le nombre de pièces d'impressions normales ou d'affranchissements est vraisemblable pour un changement de cartouche depuis la dernière recharge.
  18. Disposition selon la revendication 9, caractérisé en ce que le microprocesseur (46) est programmé en vue de la détermination précise par voie de calcul du nombre d'impressions normales réalisables à compter d'un moment, où la quantité restante d'encre prédéterminée acquise par le capteur (92) est signalée.
EP00250398A 1999-11-26 2000-11-24 Méthode pour la détermination du nombre d'impressions normales exécutables en utilisant une fonction de gestion de l'encre résiduelle et dispositif pour effectuer cette méthode Expired - Lifetime EP1103382B1 (fr)

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DE19958948A DE19958948B4 (de) 1999-11-26 1999-11-26 Verfahren zur Bestimmung der Anzahl von mit einer Tintenrestmenge ausführbaren Drucken und Vorrichtung zur Durchführung des Verfahrens

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DE50012686D1 (de) 2006-06-08
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DE19958948B4 (de) 2005-06-02
US6428132B1 (en) 2002-08-06
DE19958948A1 (de) 2001-06-07

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