EP3060486B1 - Machine d'étiquetage et procédé de fonctionnement - Google Patents

Machine d'étiquetage et procédé de fonctionnement Download PDF

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Publication number
EP3060486B1
EP3060486B1 EP14787040.6A EP14787040A EP3060486B1 EP 3060486 B1 EP3060486 B1 EP 3060486B1 EP 14787040 A EP14787040 A EP 14787040A EP 3060486 B1 EP3060486 B1 EP 3060486B1
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EP
European Patent Office
Prior art keywords
speed
label
web
label web
controller
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EP14787040.6A
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German (de)
English (en)
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EP3060486A2 (fr
Inventor
Gary Pfeffer
Philip Hart
Jeremy Ellis
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Videojet Technologies Inc
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Videojet Technologies Inc
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Priority to EP20160135.8A priority Critical patent/EP3778410A1/fr
Publication of EP3060486A2 publication Critical patent/EP3060486A2/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C1/00—Labelling flat essentially-rigid surfaces
    • B65C1/02—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/40—Controls; Safety devices
    • B65C9/42—Label feed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C1/00—Labelling flat essentially-rigid surfaces
    • B65C1/02—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands
    • B65C1/025—Affixing labels to one flat surface of articles, e.g. of packages, of flat bands the label being picked up by the article to be labelled, i.e. the labelling head remaining stationary

Definitions

  • the present invention relates to a labelling machine and particularly to a labelling machine for use with label web comprising a web and a plurality of labels attached to the web and which are separable from the web. Such machines are sometimes referred to as "roll-fed self-adhesive labelling machines”.
  • the present invention also relates to a method of operating a labelling machine.
  • a labelling machine according to the preamble of claim 1 is known from US 2006/0289106 A1 .
  • a label stock comprising a web carrying labels is usually manufactured and supplied as a wound roll (hereinafter referred to as a spool).
  • a spool For a given spool, all the labels are typically the same size, within manufacturing tolerances. However, in some instances, this is not the case.
  • Labels are commonly used to display information relating to an article and are commonly disposed on the article such that the information is easily readable either manually or automatically. Such labels may, for example, display product information, barcodes, stock information or the like. Labels may be adhered to a product or to a container in which the product is packaged.
  • Some known labelling machines apply pre-printed labels to an article.
  • Other known labelling machines print information onto labels immediately before printed labels are applied to an article.
  • Such labelling machines may be referred to as print and apply labelling machines.
  • This may be particularly important in print and apply labelling machines in which printing is typically carried out while the label moves relative to the printhead, making accurate control of the label (and hence the label web) important if printing is to be properly carried out such that the desired information is correctly reproduced on the label.
  • labels are often removed from the moving web by passing the label web under tension around a labelling peel beak (sometimes referred to as a peel beak, a peel blade or a label separating beak), it is sometimes desirable to ensure that a predetermined optimum tension in the web of the label web is maintained.
  • the label web can be moved at a predetermined speed of travel along a defined web path, so as to ensure that the speed at which labels are dispensed is compatible with the speed at which products or containers move along a path adjacent the device.
  • the advancement of the label web is generally effected by a motive apparatus. Accurate advancement of the label web requires accurate control of the motive apparatus. Such accurate control of the motive apparatus so as to accurately position the label web has been difficult to achieve in known labelling machines.
  • the likelihood that (or the extent to which) the speed of the first motive apparatus will undesirably exceed the second speed as a result of the acceleration is reduced.
  • This will be advantageous in applications of labeling machine in which it is desirable to be able to accurately position the label web along the label web path.
  • This may be advantageous to enable accurate positioning of a label onto an article to which a label is applied and, if the labelling machine includes a printer, ensuring that not only the printer prints on the correct portion of the label, but also ensuring acceptable print quality.
  • the labelling machine includes a printer with print ribbon (such as, for example a thermal transfer printer)
  • the invention may allow the motion of the label stock to more closely match that of the print ribbon, thereby improving print quality.
  • the second predetermined intermediate speed may not be intermediate the first intermediate speed and the second speed.
  • the second predetermined intermediate speed may be less than the first predetermined intermediate speed.
  • at least one of the first and second intermediate speeds may be less than the first speed. It follows that the first and second predetermined intermediate speeds may be any appropriate speed.
  • the first and second predetermined intermediate speeds may be defined as a proportion of the second speed.
  • the first and second intermediate speeds may be defined as the first speed plus a proportion of the difference between the first and second speeds.
  • the labelling machine may further include an encoder configured to produce a sensor signal indicative of the speed of the label web along the web path.
  • the encoder may be configured to monitor rotation of a roller which defines a portion of the label web path.
  • the labelling machine may include a printer comprising a printhead which is configured to press the label web against a print roller to effect printing, and the encoder may be configured to monitor the rotation of the print roller.
  • the respective predetermined speed may be defined as a proportion of the second speed.
  • the respective predetermined speed may be defined as the first speed plus a proportion of the difference between the first and second speeds.
  • the acceleration during the first time period may be a predetermined acceleration.
  • the acceleration during the second time period may be a predetermined acceleration.
  • the acceleration during the third time period may be a predetermined acceleration.
  • the acceleration during the first time period may be determined by the controller based on the first speed and the first intermediate speed.
  • the acceleration during the second time period may be determined by the controller based on the first intermediate speed and the second intermediate speed.
  • the acceleration during the second time period may be determined by the controller based on the first intermediate speed and the second intermediate speed.
  • a computer program comprising computer readable instructions arranged to carry out a method according to claim 11.
  • the methods described in any of the aspects of the invention above can be carried out in any convenient way.
  • the method may be carried out by a controller and such a controller is therefore provided by the invention.
  • the controller may be provided by any appropriate hardware elements.
  • the controller may be microcontroller which reads and executes instructions stored in a memory, the instructions causing the controller to carry out a method as described herein.
  • the controller may take the form of an ASIC of FPGA.
  • label web material is provided as a label supply spool 1 supported by a supply spool support 1a and is conveyed through a labelling station 2 to a label take up spool 3 supported by a take up spool support 3a.
  • the label web material comprises a plurality of labels (not shown) which are affixed to a backing paper (or backing web) and the labelling station is arranged to remove labels from the backing paper such that the labels are affixed to packages which are conveyed past the labelling station 2.
  • the backing paper is then taken up onto the label take up spool 3.
  • a motor 4 is coupled to the label take up spool 3 via a belt drive 3b thereby causing rotation of the take up spool 3 and consequently movement of the label web from the label supply spool 1 to the label take up spool 3 through the labelling station 2.
  • the motor 4 constitutes a first motive apparatus for transporting web along a web path between the supply spool support to the take up spool support.
  • the first motive apparatus may take any appropriate form.
  • both the label supply spool 1 and the label take up spool 3 may be driven either by the same motor or by respective motors.
  • the motor 4 is a stepper motor.
  • the stepper motor is driven by a stepper motor driver (also referred to as a stepper motor drive circuit) 4a, as is well known in the art.
  • the motor(s) driving the label take up spool 3 may be motors other than stepper motors.
  • the motor(s) may be direct current (DC) motor(s).
  • the motor(s) may be torque controlled motors (e.g. DC motors) or position controlled motors (e.g. stepper motors, or DC servo motors).
  • DC motors direct current
  • the motor(s) may be torque controlled motors (e.g. DC motors) or position controlled motors (e.g. stepper motors, or DC servo motors).
  • an appropriate motor drive control system will be required.
  • the labelling station 2 includes a thermal transfer printer which is arranged to print on labels of the label web as they pass through the labelling station 2 and before they are removed from the backing paper. Further details of the thermal transfer printer are discussed below.
  • Ink carrying ribbon 5b is provided on a ribbon supply spool 5 which is supported by a ribbon supply spool support 5a.
  • the ribbon 5b passes a printhead assembly 6 and is taken up by a ribbon take-up spool 7 which is supported by a ribbon take-up spool support 7a.
  • the ribbon supply spool 5 is driven by a first stepper motor (not shown) while the ribbon take-up spool 7 is driven by a second stepper motor (again not shown).
  • the ribbon supply spool support 5a is mounted on an output shaft of the first stepper motor, while the ribbon take-up spool support 7a is mounted on an output shaft of the second stepper motor.
  • the first and second stepper motors may be arranged so as to operate in push-pull mode whereby the first stepper motor rotates the ribbon supply spool 5 to pay out ribbon while the second stepper motor rotates the ribbon take-up spool 7 so as to take up tape.
  • tension in the ribbon may be determined by control of the motors.
  • the ribbon may be transported from the ribbon supply spool 5 to the ribbon take up spool 7 passed the printhead assembly 6 in other ways.
  • the ribbon take up spool may be driven by a motor while the ribbon supply spool 5 is arranged so as to provide resistance to ribbon motion, thereby causing tension in the ribbon. That is, the first motor driving the ribbon supply spool 5 may not be required in some embodiments.
  • the motors driving the ribbon supply spool 5 and the ribbon take up spool 7 may be motors other than stepper motors.
  • the motors driving the ribbon supply spool 5 and the ribbon take up spool 7 may be direct current (DC) motors.
  • the motors driving the ribbon supply spool 5 and/or the ribbon take up spool 7 may be torque controlled motors (e.g. DC motors) or position controlled motors (e.g. stepper motors, or DC servo motors).
  • torque controlled motors e.g. DC motors
  • position controlled motors e.g. stepper motors, or DC servo motors.
  • the printhead assembly 6 comprises a printhead (not shown) which presses the ribbon 5a and label web 1b against a print roller (not shown) to effect printing.
  • the printhead is a thermal transfer printhead comprising a plurality of printing elements, each arranged to remove a pixel of ink from the ribbon and to deposit the removed pixel of ink on a substrate (in this case labels which form part of the label web).
  • the labelling station 2 is configured to separate labels of the label web from the backing web as the label web passes the labelling station. The separated labels may then be applied to an article which passes the labelling machine.
  • the labelling station includes a labelling peel beak 12.
  • the labelling peel beak 12 is configured such that, during operation of the labelling machine, as the label web 1b is transported along the web path past the labelling peel beak 12, the labelling peel beak 12 separates passing labels of the label web 1b from the backing web.
  • the labelling peel beak may be replaced by any appropriate component configured to separate passing labels of the label web from the backing web.
  • the labelling station, take up spool support, supply spool support first motive apparatus and printer are mounted to a base plate 11.
  • the labelling machine also includes an encoder 2a which is arranged to output a sensor signal 2b which is indicative of the position of the label web along the label web path.
  • the sensor signal may also be used to determine a rate of movement of the label web along the label web path.
  • the determination of a rate of movement of the label web along the label web path may be made by a controller 10 to which the sensor signal 2b is provided.
  • the determination of a rate of movement of the label web along the label web path may be made by the encoder itself and a signal indicative thereof provided to the controller.
  • the rate of movement of the label web may be a speed of the label web, an acceleration of the label web, an amount of movement of the label web during a given time, or the time taken for the label web to move a predetermined distance along the web path.
  • the encoder monitors rotation of the print roller.
  • the print roller comprises an aluminium shaft of diameter 8mm and is coated with a non-slip coating.
  • the non-slip coating is a silicon rubber coating having a Shore A hardness of 50-55 and a thickness of 2.75mm.
  • the primary purpose of the print roller is to provide a backing support against which the printhead presses the ribbon and label web so as to effect thermal transfer printing onto a label.
  • the print roller acts as platen roller.
  • the provision of a non-slip coating has the effect of ensuring that there is substantially no slippage between the print roller and the label web. Consequently, the print roller rotates consistently as the label web moves along the web path. This means that the rotation of the print roller is an accurate indicator of label web movement. Rotation of the print roller may be used in processing carried out by the controller in order to determine a rate of movement of the label web in the manner described below.
  • the diameter of the print roller is known to the controller.
  • the print roller has a diameter of 13.5mm. It is preferable that the print roller has a moment of inertia as small as possible, and it is for this reason that the shaft is made from aluminium. Because the diameter of the print roller is known, and because the label web runs over the print roller as the label web passes through the printer, the amount of rotation of the print roller is proportional to the displacement of the label web along the label web path. Consequently, a sensor signal output by the encoder, which is indicative of the amount of rotation of the print roller, may be supplied to a controller such that the controller can determine the displacement of the label web along the label web path and, consequently, the rate of movement of the label web along the label web path.
  • the encoder which measures the rotation of the print roller comprises a magnet (part number BMN-35H which is marketed by Bomatec, Hori, Switzerland) which is mounted to the end of the print roller such that it co-rotates with the print roller, and an encoder chip (part number AMS5040, marketed by ams R&D UK Ltd) which measures rotation of the magnet and hence print roller, and outputs a signal which is representative thereof. As discussed above, this output can be used by the controller to determine the rate of movement of the label web along the label web path.
  • a magnet part number BMN-35H which is marketed by Bomatec, Hori, Switzerland
  • an encoder chip part number AMS5040, marketed by ams R&D UK Ltd
  • the encoder in this embodiment measures a rotation of the printer roller in order to output a sensor signal which is indicative of the position of the label web along the label web path (and/or rate of movement of the label web), in other embodiments this need not be the case.
  • Any appropriate encoder which is capable of outputting a sensor signal which is indicative of the position of the label web along the label web path (and/or rate of movement of the label web along the label web path) may be used.
  • an encoder which measures the rotation of a different roller which contacts the label web may be used.
  • an encoder which does not contact the label web may be used.
  • the encoder may measure a property of the label web which is periodic in order to provide a sensor signal which is indicative of the position of the label web along the label web path.
  • the encoder may use a label sensor.
  • One type of label sensor is a gap sensor which may be used to measure the amount of electromagnetic radiation (e.g. light) which passes through a portion of the label web (this will be a function of the electromagnetic transmission coefficient of the label web).
  • the label backing web in general has a greater electromagnetic transmission coefficient than a label attached to the label backing web. It follows that, in general, more electromagnetic radiation will pass through a portion of the label web which does not include a label (i.e.
  • the gap sensor will measure a periodic property of the label web (I.e. periodic electromagnetic transmission coefficient of the label web). If a pitch length of the labels (i.e. the distance between equivalent portions of adjacent labels) is known by the controller then the controller can use this information to calculate a rate of movement of the label web along the label web path based on the periodic encoder signal. In other embodiments an appropriate label sensor which can measure a periodic property of the label web may be used.
  • the rotation of the label supply spool and/or label take up spool may be measured by the encoder, and this information, in combination with knowledge of the diameter of the respective supply spool and/or take up spool may be used to determine the position of the label web along the label web path.
  • the controller 10 is configured to receive the sensor signal 2b which is outputted by the encoder 2a and control the first motive apparatus based on the sensor signal.
  • the controller 10 is configured to receive the sensor signal 2b which is outputted by the encoder 2a and control the stepper motor driver 4a and hence the stepper motor 4.
  • the controller in order to advance the label web along the label web path the controller provides a pulsed control signal 10a to the first motive apparatus.
  • the pulsed control signal 10a provided to the first motive apparatus by the controller 10 may be pulses which trigger a stepper motor drive circuit 4a for the stepper motor 4 to advance the stepper motor 4 in a step-wise fashion.
  • stepper motor drive circuits in order to drive stepper motors in a step-wise fashion is well known and hence will not be discussed in any more detail here.
  • the pulsed control signal provided to the first motive apparatus by the controller may be pulses which trigger a stepper motor drive circuit for each respective stepper motor to advance both the stepper motors in a step-wise fashion.
  • the first motive apparatus includes at least one stepper motor, in other embodiments the first motive apparatus may take any appropriate form.
  • the first motive apparatus may include any appropriate number of any appropriate type of motor.
  • a known way for controllers to control certain motors such as stepper motors is for the controller to provide a pulsed control signal to the motor.
  • the nature of the pulsed control signal may be defined by the intervals between each of the pulses.
  • a series of intervals between pulses may be a series of different intervals, the length of each interval decreasing as the series advances.
  • a pulsed control signal comprising such a series of intervals between pulses may be used by the controller to accelerate the motor in a desired manner.
  • the controller may access information stored in a memory which contains data indicative of the series of intervals of the pulsed control signal which corresponds to acceleration between said first speed and said second speed and apply the intervals between pulses stored in the memory so as to achieve the desired acceleration of the motor between the first and second speeds.
  • the data indicative of the series of intervals of the pulsed control signal which corresponds to acceleration between a first speed and a second speed may be referred to as an acceleration table for acceleration between the first speed and the second speed.
  • the controller may not access a stored acceleration table, but given knowledge of the first and second speeds between which acceleration is required, the controller may calculate and implement the required acceleration table for acceleration between the first speed and the second speed.
  • the controller controls the first motive apparatus to accelerate the first motive apparatus (and hence label web) to a desired speed, but, in fact the first motive apparatus (and hence label web) is accelerated to a speed which is greater than a desired speed.
  • This may result from the mass and compliance of the system, for example, the mass of the supply spool, the mass of the rewind spool and/or the compliance in the first motive apparatus (e.g. belt linking stepper motor to take up spool support).
  • the system may oscillate, such that the rate of movement of the first motive apparatus oscillates. Oscillations in the speed of the label web may make accurate positioning of the label web along the label web path difficult.
  • a controller 10 may implement a feedback loop whereby the sensor signal 2b output by the encoder 2a is used to control drive of the first motive apparatus 4 in order to try to advance the label web at a desired speed and/or to a desired position.
  • the controller may provide a control signal to the first motive apparatus to accelerate the first motive apparatus (and hence label web) to a desired speed, but, in fact the first motive apparatus (and hence label web) is accelerated to a speed which is greater than a desired speed.
  • the controller may provide a control signal to the first motive apparatus to accelerate the first motive apparatus (and hence label web) to a desired speed, but, in fact the first motive apparatus (and hence label web) is accelerated to a speed which is greater than a desired speed.
  • One reason for this may be that there is a delay between signals provided to the first motive apparatus by the controller and resultant acceleration of label web.
  • the label web is accelerated to a speed which is greater than the desired speed, it may, in some applications, be disadvantageous. For example, it may then be necessary to decelerate the label web to the desired speed. This can take time, during which the labelling machine is not operating as desired. Furthermore, having to accelerate and then decelerate the label web may lead to oscillations in the speed of the label web which make accurate positioning of the label web along the label web path difficult.
  • Figure 2 shows a schematic plot of speed of the label web (which may be ascertained using the sensor signal provided by the encoder) against time, for the acceleration of the label web from rest to speed V as controlled by a controller which forms part of a labelling machine according to an embodiment of the present invention.
  • Figure 3 shows a schematic flow chart which shows the steps of the process implemented by the controller for the acceleration of the label web from rest to speed V as shown in Figure 2 .
  • the controller 10 is configured such that the controller provides a control signal 10a to the first motive apparatus 4 to accelerate the first motive apparatus 4 between a first speed (in this case rest, but which may be any appropriate speed) and a second speed (in this case V, but, again, this may be any appropriate speed) as follows.
  • a first speed in this case rest, but which may be any appropriate speed
  • a second speed in this case V, but, again, this may be any appropriate speed
  • the speed V may be determined in any appropriate manner.
  • the speed V may be predetermined and may be stored by the controller or by a memory accessible by a controller.
  • the speed V may correspond to the speed of a passing article to be labelled by the labelling machine.
  • the speed V may be chosen to be the same as the speed of the conveyor.
  • an encoder may measure the speed of the conveyor. The measured speed of the conveyor may be supplied to the controller so that the controller can set V to be the measured speed of the conveyor.
  • the command signal (that acceleration of the label web from rest to speed V is required) may be triggered by any appropriate event.
  • the controller may be provided with a signal from an article sensor.
  • the article sensor is configured to sense the presence of an article to be labelled at a position which indicates that the labelling machine needs to dispense a label in order to label the article sensed by the article sensor.
  • the command signal (that acceleration of the label web from rest to speed V is required) is triggered.
  • the controller provides a control signal to the first motive apparatus to command the first motive apparatus to accelerate to a predetermined first intermediate speed intermediate the first speed and second speed.
  • the predetermined first intermediate speed in this case is 20% of the second speed (in this case V).
  • the controller then waits for a period of time t 1 at step S3 during which the control signal provided to the first motive apparatus is such that the controller is attempting to accelerate the first motive apparatus from the first speed (in this case rest) to the first intermediate speed (in this case 20% of the second speed, V).
  • the period of time t 1 is in accordance with the invention a fixed predetermined time which is known to the controller. Alternatively, it can be a time which is defined by another event such as the controller receiving a sensor signal from the encoder that the speed of the label web is a particular speed, or that the label web has advanced a particular distance. In this case, the time is a predefined time, which is about 2ms.
  • the initial acceleration as indicated by 40 may be determined by the controller as a function of the first and second speeds between which acceleration of the first motive apparatus is required. In other embodiments the initial acceleration 40 may be predetermined and known by the controller. For example, the initial acceleration 40 may be at a rate of about 50mm/s 2 .
  • step S4 After time t 1 has passed the controller moves to step S4 and provides a control signal to the first motive apparatus to command the first motive apparatus to accelerate to a second predetermined intermediate speed.
  • the second predetermined intermediate speed is intermediate the first intermediate speed and the second speed. In this case, the second predetermined intermediate speed is about 40% of the second speed V.
  • the controller provides a control signal to the first motive apparatus in order to command the first motive apparatus to accelerate to the second predetermined intermediate speed for a second period of time t 2 . Consequently, at step S5 the controller waits for the second period of time t 2 .
  • the second period of time t 2 is in accordance with the invention a fixed predetermined time which is known to the controller. Alternatively, it can be a time which is defined by another event. Examples of such criteria include when the sensor signal provided by the encoder to the controller is indicative of the label web travelling at a particular speed or when the sensor signal provided by the encoder is indicative of the label web being located at a particular position along the label web path.
  • the length of the second period of time t 2 is the time between the end of the first time period t 1 and the time at which the sensor signal provided by the encoder to the controller is indicative of the label web travelling at a speed which is equal to about 40% of the second speed (in this case V).
  • the controller moves to step S6 and provides a control signal to the first motive apparatus to command the first motive apparatus to accelerate to a third predetermined intermediate speed intermediate the second intermediate speed and the second speed V.
  • the third intermediate speed is about 75% of the second speed V.
  • the controller controls the first motive apparatus in the manner required to accelerate the first motive apparatus to the third intermediate speed for a third period of time t 3 . Consequently, at step S7 the controller waits for the third period of time t 3 .
  • the third period of time is a predetermined time.
  • the period of time t 3 is the length of time between the end of the second period of time t 2 and the time at which the sensor signal provided by the encoder is indicative of the label web travelling at a speed of about 75% of the second speed V.
  • the controller moves to step S8 and provides a control signal to the first motive apparatus to command the first motive apparatus to accelerate to the second speed V.
  • the controller provides the control signal to the first motive apparatus to command it to accelerate to the second speed V for a fourth period of time t 4 . Consequently, at step S9 the controller waits for the fourth period of time t 4 .
  • the controller provides a control signal to command the first motive apparatus to accelerate to the second speed V.
  • the fourth time period is the length of time between the end of the third time period and the time at which the sensor signal provided to the controller by the encoder is indicative of the label web travelling at a speed which is substantially equal to the second speed V.
  • step S10 after the speed of the label web has reached the second speed V (as indicated by the sensor signal provided by the encoder) the controller provides a control signal to the first motive apparatus to maintain the speed of the first motive apparatus (and hence the speed of the label web) at the second speed V.
  • the portion of the motion of the first motive apparatus shown within Figure 2 which corresponds to the label web travelling at a constant speed (the second speed V) is indicated by 42.
  • the controller may need to adjust the speed(s) of the motor(s) as a function of the changing diameters of the take up and/or supply spool. Changing the speed of rotation of motors in order to maintain a constant speed of label web along a label web path is well known to those skilled in the art, and, as such, is not discussed any further.
  • the overshoot in label web speed resulting from acceleration of the label web may result in the label web passing the printer at a speed which exceeds the speed up to which the printer can print with acceptable print quality.
  • a labelling machine according to the present invention will minimise the likelihood that/or extent to which the label web speed may exceed the speed up to which the printer can print with acceptable print quality, thereby minimising the likelihood that/or extent to which the print quality of the printer will be adversely affected.
  • the previously described embodiment includes four separate phases of movement as the first motive apparatus is accelerated between the first and second speeds. These may be referred to as the first phase of movement (steps S2 and S3) during the first time period t 1 , the second phase of movement (steps S4 and S5) during the second time period t 2 , the third phase of movement (steps S6 and S7) during the third time period t 3 and the fourth phase of movement (steps S8 and S9) during the fourth time period t 4 .
  • each of the phases, providing the phase has a preceding phase, immediately follows its preceding phase.
  • each of the phases, provided the phase has a subsequent phase immediately precedes its subsequent phase. In other embodiments this need not be the case.
  • the predetermined intermediate speeds are defined as a percentage (or proportion) of the second speed (V).
  • the predetermined intermediate speeds may be determined and/or defined in any appropriate manner provided that the intermediate speeds are between the first and second speeds and provided that each intermediate speed is not less than any preceding intermediate speed.
  • the first speed is at rest and the second speed is a speed V.
  • the first speed may be a speed which is greater than rest but less than the second speed V.
  • the intermediate speed may alternatively be defined as a desired percentage (or proportion) of the difference between the first and second speeds added to the first speed.
  • the intermediate speeds are such that each intermediate speed is greater than any intermediate speed before it. In other embodiments, not forming part of the present invention, this need not be the case. In these embodiments the intermediate speeds may be such that at least one intermediate speed may be less than a preceding intermediate speed. Furthermore, in some embodiments, at least one intermediate speed may be less than the first speed. It follows that the intermediate speeds may be any appropriate speed.
  • the intermediate speeds are defined as speeds of the first motive apparatus which correspond to desired speeds of the label web.
  • the intermediate speeds may be defined as a rotational speed of a portion of the first motive apparatus which is equivalent to a linear speed of the label web along the label web path.
  • the predetermined intermediate speeds may be defined as desired speeds of the first motive apparatus (without knowledge of the corresponding linear speeds of the label web), and in particular as a particular proportion of a desired speed of the motive apparatus.
  • the predetermined intermediate speeds be any appropriate intermediate speeds, but also the time period may be defined by a sensor signal indicative of the speed of the label web being equal to any particular appropriate speed being provided to the controller.
  • Any appropriate particular speed may be chosen provided that it is a speed which is between the first and second speeds and that it is a speed which is greater than the label web speed which defines the end of any preceding phase of the acceleration.
  • the speeds may be defined as a percentage (or proportion) of the second speed or may be defined as a percentage (or proportion) of the difference between the first and second speed added to the first speed.
  • the time period for one or more of the phases of acceleration may be defined by a sensor signal indicative of the speed of the label web being equal to a percentage (or proportion) of the intermediate speed to which the controller is controlling the first motive means to accelerate during that particular phase of acceleration.
  • the controller may utilise an acceleration table for acceleration between the two speeds so as to supply a pulsed control signal to the first motive means which corresponds to acceleration of the first motive means between the two speeds.
  • An example of one type of labelling machine which may result in lag between the motive apparatus which advances the label web and the label web itself is a labelling machine which has a motive apparatus which operates by a motor rotating a take up spool support so as to draw a label web onto the take up spool support to form a take up spool.
  • the winding of label web onto the take up spool support will result in label web being advanced along the label web path.
  • the motor which drives the take up spool support is energised. This causes the take up spool support to be rotated. The rotation of the take up spool support rotates the take up spool. It is thought that the coiled nature of the take up spool means that as the take up spool support is rotated, before the label web is advanced along the label web path, the take up spool becomes more tightly wound.
  • the labelling machine also includes a label sensor (indicated as 9 in Figure 1a ).
  • the label sensor is configured to detect when a particular portion of the label passes.
  • label sensor is a gap sensor. Gap sensors are well known to a person skilled in the art of labelling machines and are used to detect an edge (for example a leading edge) of the labels of the label web which pass the gap sensor.
  • the gap sensor is usually located a fixed distance along the label web path from a target position to which it is desired to advance the edge of each label which is detected by the gap sensor. When the labelling machine is operating, the labelling machine operates so as to try to advance the label web to place the edge of each label of the label web at the target position.
  • controller of the labelling machine receiving a signal from the gap sensor indicative of the detection of an edge of a label on the label web and the controller controlling the motive apparatus which advances the label web along the label web path so as to advance the label web by the distance between the target position and the gap sensor.
  • any type of label sensor may be used provided it can detect a particular portion of a label of the label web passing it. Whilst a gap sensor may be used to detect an edge of a label of the label web, in other embodiments the label sensor may detect any appropriate particular portion of the label web.
  • the controller controls the motor which drives the take up spool support to rotate the take up spool support by an amount which will cause the label web to advance along the label web path by a distance which is the distance between the gap sensor and the target position.
  • the label web (including attached labels)
  • the label web advances some distance along the label web path beyond the target position. It is thought that this additional distance (which may be referred to as the lag distance) moved by the label web along the label web path after the first motive apparatus has come to rest is the result of a lag amount of label web being taken onto the take up spool after the first motive apparatus has come to rest. This may be due to a relaxation of the label web, for example the take up spool becoming less tightly wound.
  • labelling machines in which the label web is advanced and then stopped such that the label web does not end up at a desired target position, but rather at a position which is advanced by some distance from the target position may be disadvantageous in applications of labelling machines in which label position accuracy is important.
  • An embodiment seeks to obviate or mitigate the above problem.
  • a labelling machine includes a supply spool support 1a, take up spool support 3a and first motive apparatus 4 as previously discussed (and illustrated in Figures 1 and 1a ).
  • the labelling machine also includes a controller 10 which is configured such that the controller controls the first motive apparatus 4 to advance the web along the web path by a predetermined distance as follows.
  • Figure 4 shows a schematic flow diagram of the steps implemented by a controller of a labelling machine according to this aspect .
  • step G1 a command signal that the web requires advancement along the web path by the predetermined distance is triggered.
  • the command signal (that the web requires advancement along the web path by the predetermined distance) may be triggered by any appropriate event.
  • the controller may be provided with a signal from an article sensor.
  • the article sensor is configured to sense the presence of an article to be labelled at a position which indicates that the labelling machine needs to dispense a label in order to label the article sensed by the article sensor.
  • the command signal (that the web requires advancement along the web path by the predetermined distance) is triggered.
  • the controller may be provided with a signal from a label sensor.
  • the label sensor may be configured to sense the presence of a particular portion of labels of the label web.
  • the label sensor may be configured to sense the presence of an edge (e.g. leading or trailing edge) of labels of the label web.
  • the command signal that the web requires advancement along the web path by the predetermined distance
  • a control signal is provided to the first motive apparatus which causes the first motive apparatus to advance the label web along the label web path by a distance which is less than the predetermined distance.
  • the label web is allowed to relax in order to allow the label web to advance along the web path a further distance. This further distance is thought to result from the lag in the label web as previously discussed.
  • step G4 movement of the label web in consequence of the command signal that the web requires advancement along the web path by the predetermined distance is complete.
  • the controller provides a control signal to the first motive apparatus which causes the first motive apparatus to advance the web along the web path by a distance which is less than the predetermined distance and which is equal to the difference between the predetermined distance and the distance by which the label web will advance when it relaxes (i.e. the lag distance).
  • a total distance moved by the label web i.e. sum of the distance moved by the label web due to the first motive apparatus, and the distance moved due to relaxation of the web after the web has been advanced by the first motive apparatus to be equal to the predetermined distance.
  • the controller may provide a control signal to the first motive apparatus which causes the first motive apparatus to advance the web along the web path by a distance which is less than the predetermined distance, but is not equal to the difference between the predetermined distance and the lag distance.
  • the total movement distance of the web along the web path i.e. the movement distance due to the first motive apparatus plus the movement distance due to a lag
  • the total distance by which the label web advances may be greater than the predetermined distance and in other embodiments the total distance by which the label web advances may be less than the predetermined distance.
  • the disclosure will be advantageous in applications of labelling machine in which accurate positioning of the label web along the label web path is required.
  • control signal which is provided to the first apparatus which causes the first motive apparatus to advance the web along the web path by a distance which is less than the predetermined distance may be determined by the controller based on the subtraction of an estimated lag distance from the predetermined distance.
  • the determination of the distance which is less than the predetermined distance by the controller based on subtraction of an estimated lag distance from the predetermined distance is indicated in broken lines in Figure 4 as step G1A.
  • the estimated lag distance may be determined in any appropriate manner.
  • the estimated lag distance may be an appropriate distance which is input by a user and which is used whatever the operating state of the labelling machine.
  • the controller may determine or select the estimated lag distance based on operating characteristics of the labelling machine. For example, the controller may determine an estimated lag distance based on the diameter of the take up spool and/or a speed at which a label web is advancing along the label web path before it is decelerated. In other embodiments, any appropriate operating characteristics of the labelling machine may be used.
  • the lag distance is measured empirically for different speeds and diameters of take up spool. This information can then be stored in a memory and accessed by the controller to determine the estimated lag distance for a particular take up spool diameter and/or speed. In general, it has been found that the lag distance increases with increasing take up spool diameter or increasing speed.
  • label web speed and/or take up spool diameter may be determined in any one of many known ways to determine label web speed and/or take up spool diameter. Consequently, further discussion of determining these operating characteristics of a labelling machine is omitted.
  • the estimated lag distance may be determined by the controller based on a sensor signal indicative of the position of the label web along the label web path output by an encoder and provided to the controller.
  • An example of a suitable encoder is that which has previously been described which measures rotation of the print roller (e.g. encoder 2a shown in Figure 1a ). It will be appreciated that, in other embodiments, any appropriate encoder which outputs a sensor signal indicative of the position of the label web along the label web path may be used.
  • the encoder is used to measure the lag distance moved by the label web after the first motive apparatus has come to rest. This measured distance may then be used as the estimated lag distance for a subsequent movement of the label web.
  • the measured lag distances for a succession of movements of the label web may be averaged in order to determine an estimated lag distance to be used for subsequent movement of the label web.
  • the encoder In order for an encoder to measure the lag distance the encoder must measure the distance moved by the web along the label web path after the first motive apparatus has stopped moving the label web along the label web path.
  • the controller may measure the lag distance by comparing the position of the label web along the web path at the time when the first motive apparatus has come to rest and at a fixed time after this. In some embodiments, this time may be 250ms. However, in other embodiments, any appropriate time may be used, provided that the time is sufficient for any relaxation of the label web which leads to the lag to occur.
  • the encoder may measure the total distance moved by the web along the label web path after the command signal that the web requires advancement along the web path by the predetermined distance is triggered.
  • the controller may wait until a fixed time after the first motive apparatus has come to rest and calculate the difference between the predetermined distance and the distance moved by the label web along the label web path between the time of the triggering of the command signal and the end of the fixed time after the first motive apparatus has come to rest.
  • the fixed time may be 250ms. However, in other embodiments, any appropriate time may be used, provided that the time is sufficient for any relaxation of the label web which leads to the lag to occur.
  • the estimated lag distance may be determined using a combination of the methods above.
  • the estimated lag distance may initially be determined by the controller based on the diameter of the take up spool and a speed at which a label web is advancing along the label web path before it is decelerated.
  • the estimated lag for a range of speeds and diameters may previously have been measured empirically and stored in a memory, such that the controller can access this memory to determine an estimated lag distance for a particular diameter of take up spool and speed at which the label web is advancing along the label web path before it is decelerated.
  • an encoder may be used as described above to determine the actual lag distance as a result of the label web being commanded to move the predetermined distance. This will enable the controller to determine an estimated lag error, which is the difference between the predetermined distance and the distance moved by the label web along the label web path (using the estimated lag distance) between the time of the triggering of the command signal and the end of the fixed time after the first motive apparatus has come to rest.
  • the determined estimated lag error may then be added to the estimated lag distance for a next advancement of the web along the web path determined based on the diameter of take up spool and speed at which the label web is advancing along the label web path before it is decelerated in order to arrive at the estimated lag distance for the next advancement of the web along the web path.
  • the estimated lag distance for the next advancement of the web along the web path may be carried out as follows. The sum of the estimated lag distance used for the previous advancement of the web and the estimated lag error is divided by the estimated lag distance used for the advancement of the web to arrive at an estimated lag correction factor. The estimated lag distance for the next advancement of the web along the web path is calculated as the estimated lag distance determined based on the diameter of take up spool and speed at which the label web is advancing along the label web path before it is decelerated for the next advancement of the web, multiplied by the estimated lag correction factor.
  • the estimated lag distance for the next advancement of the web along the web path may be carried out as follows.
  • the estimated lag distance for the next advancement of the web along the web path is calculated as the estimated lag distance determined based on the diameter of take up spool and speed at which the label web is advancing along the label web path before it is decelerated for the next advancement of the web, multiplied by one plus the estimated lag correction factor.
  • the estimated lag error or estimated lag correction factor may be averaged over a number of preceding label web advancements (e.g. 8, but any appropriate number may be used) before they are used in order to calculate the estimated lag distance for a next advancement of the web along the web path.
  • the label web is located at a particular position along the label web path. For example, after a label has been dispensed by the labelling machine (i.e.
  • the label web has been accelerated and advanced by the first motive apparatus such that a label has been removed from the label web by the labelling peel beak (or other suitable device for removing a label from the label web) and then the label web has been decelerated to rest) it may be desirable for the label web to come to rest at a desired position along the label web path, such as a position at which a leading edge of the next label to be dispensed is substantially aligned with the edge of the labelling peel beak. It will be appreciated that in other embodiments, the desired position of the label web along the label web path when the label web has come to rest may be any appropriate position.
  • the label web may not stop at the desired position along the label web path.
  • the lag distance i.e. the distance moved by the label web along the label web path due to lag
  • the exact amount of lag distance for the movement of the label web required to dispense a label shows some variation. Because of this, it is not possible to reliably locate the label web along the label web path by using a gap sensor (as previously discussed) to position the label web (and hence labels of the label web) at a desired position along the label web path.
  • the inability to reliably locate the label web along the label web path after a labelling operation may be undesirable.
  • the label web comes to rest at a position before (i.e. upstream of) the desired position along the web path then the label web will have to be advanced further during a subsequent labelling operation, which may result in the subsequent labelling operation taking longer to complete.
  • the inability to reliably locate the label web along the label web path means that the movement the label web has to undergo for each labelling operation is unpredictable.
  • An embodiment seeks to obviate or mitigate this problem.
  • this embodiment of the invention includes a supply spool 1, a take up spool 2 and a first motive apparatus 4 as previously discussed (for example, in relation to Figures 1 and 1a ).
  • a labelling machine also includes an encoder 2a configured to produce a sensor signal 2b indicative of the position of the label web along the web path.
  • the encoder may be of any appropriate type of capable of producing a sensor signal indicative of the position of the label web along the label web path.
  • the labelling machine also includes a controller 10 configured to provide a control signal 10a to the first motive apparatus 4.
  • Figure 5 shows a schematic flow diagram of the steps implemented by a controller of a labelling machine according to this aspect .
  • the controller is configured such that at step H1 a command signal is triggered that commands the first motive apparatus to decelerate the label web from a first speed to rest such that the web stops at a desired position along the web path.
  • the command signal (that the first motive apparatus should decelerate the label web from a first speed to rest such that the web stops at a desired position along the web path) may be triggered by any appropriate event.
  • the controller may be provided with a signal from a label sensor.
  • the label sensor may be configured to sense the presence of a particular portion of labels of the label web.
  • the label sensor may be configured to sense the presence of an edge (e.g. leading edge or trailing edge) of labels of the label web.
  • the command signal (that the first motive apparatus should decelerate the label web from a first speed to rest such that the web stops at a desired position along the web path) may be triggered.
  • the controller achieves this by, at step H2, providing a control signal to the first motive apparatus to decelerate the first motive apparatus between the first speed and rest such that the label web is brought to rest by the first motive apparatus at an intermediate position along the web path.
  • the controller then waits a period of time at step H3.
  • the time period is chosen in order to enable any movement of the label web along the label web path due to lag to be completed.
  • the time period that the controller is configured to wait may be any appropriate time. In some embodiments the time that the controller waits may be about 250ms.
  • step H4 the controller provides a control signal to the first motive apparatus to move the web along the web path by a correction amount to position the label web (and hence labels of the label web) at the desired position along the web path.
  • step H5 movement of the label web in consequence of the command signal that the web requires advancement along the web path by the predetermined distance is complete.
  • step H4 the controller uses the encoder to determine the position of the label web along the label web path at the intermediate position and compare this to the desired position of the label web along the label web path. This is indicated in broken lines as step H3A within Figure 5 .
  • the controller determines the movement required in step H4 in order to locate the label web at the desired position along the label web path and during step H4 provides a control signal to the first motive apparatus in order to move the label web along the label web path from the intermediate position to the desired position.
  • the difference between the intermediate position of the label web along the label web path and the desired position is determined at step H3A as follows.
  • the controller may be aware of the distance the label web has to travel along the label web path in order for the label web to arrive at the desired position. For example, if an edge of the label web is detected by a gap sensor at a particular time, then the controller may know that at that given time, the label web has to advance a particular distance (for example the distance between the gap sensor and the edge of the labelling peel beak) in order for the label web to arrive at the desired position.
  • the controller monitors the sensor signal produced by the encoder in order to determine the distance along the web path the label web moves whilst it is advanced to the intermediate position and also measures any further advancement of the label web along the label web path due to lag. This is the distance moved by the label web along the label web path between the given time (time at which the edge of the label passes a gap sensor) and at the time after the controller has waited for the previously described period of time in order to allow for any movement of the label web along the label web path due to lag.
  • the difference between the distance which the label web should have been advanced from the time at which the edge of the label was detected by the gap sensor in order to reach the predetermined position of the label web along the label web path, and the distance travelled by the label web along the label web path as the label web moves to the intermediate position and then advances any further distance due to label web lag is then determined by the controller. This is the distance that the controller uses to provide a control signal to the first motive apparatus to move the web along the web path by the correction amount so as to position the web at the desired position along the web path.
  • the correction amount may be an amount which requires that the label web is advanced (i.e. moved forward) of the web along the web path in order to position the web at the desired position along the label web path. In other cases, the correction amount may amount that requires that the label web retreats (i.e. moved backward) in order to be positioned at the desired position along the web path. As such, the correction amount may have a positive or negative value, where positive values are associated with label web advancement and negative values are associated with label web retreat or vice-versa.
  • the label web may be moved by the first motive apparatus in any appropriate manner in order to cause the label web to retreat along the label web path if required.
  • the embodiment of labelling machine according to the present invention shown in Figure 1 includes a spring biased dancing arm D including a roller which defines a portion of the label web path because the label web moves around the roller of the dancing arm.
  • the dancing arm is biased in a direction in which the dancing arm increases the path length distance between the takeup spool and supply spool. As such, if the takeup spool is rotated in the opposite direction to that required to draw label web on to the take up spool, the dancing arm will pull a portion of the label web along the web path such that the label web retreats along the label web path.
  • the speed at which the first motive apparatus moves the web along the web path by the correction amount in step H4 in order that the label web reaches the desired position may be a relatively slow speed, for example 25 millimetres per second.
  • the controller may control the first motive apparatus to advance the web along the web path by the correction amount at any appropriate speed provided that it is slow enough that any label lag which may occur as a result of the movement of the label web along the label web path by the correction amount is minimised or such that there is no lag. It has been found by the applicant that the slower the speed at which the label web is advanced before being decelerated to rest, the less movement of the label web along the label web path after the motive apparatus has come to rest due to lag occurs.
  • the intermediate position is a predetermined distance along the label web path relative to the desired position.
  • the intermediate position is 0.5 millimetres upstream (i.e. before) the desired position. In other embodiments any appropriate intermediate position or method of determining the intermediate position may be used.
  • the controller may control the first motive apparatus so as to not carry out the movement required to effect movement of the label web along the label web path by the correction amount. Instead the determined correction amount may be added to the movement required by the label web for the subsequent labelling operation. In this way the label web is advanced along the label web path during the subsequent labelling operation by a distance such that the subsequent label is correctly dispensed (e.g. such that the label is applied to a correct portion of a product passing the label machine).
  • the controller may control the first motive apparatus so as to, at the time the subsequent labelling operation is requested, stop carrying out the correction amount of advancement.
  • the remaining portion of the correction amount at the time when the correction amount of advancement is stopped due to a subsequent labelling operation being requested may be added to the movement required by the label web for the subsequent labelling operation.
  • the labelling machine is mounted adjacent to a conveying device (such as, but not limited to, a conveyor belt).
  • the labelling machine and conveying device are arranged relative to one another such that the labelling machine may apply labels to products transported to the labelling machine by the conveying device.
  • Operation of the labelling machine so as to dispense a label is normally initiated by a product sensor being triggered indicating that a product to be labelled is present (for example, in some cases, that a product to be labelled is approaching the labelling machine on the conveying device).
  • the controller is programmed with a so-called "registration delay".
  • a registration delay can indicate a time which should elapse (monitored by a simple timer) after detection of the product by the product sensor before the labelling process begins, or alternatively indicate a distance through which the conveying device should move (as monitored by an encoder for measuring the distance moved by the conveying device) before the labelling process begins.
  • the registration delay may be input to the controller by an operator of the labelling machine. It will be appreciated that by adjusting the registration delay, the position on a passing product at which a label is affixed may be adjusted.
  • the registration delay may be modified for a subsequent labelling operation in the situation where the subsequent labelling operation has been requested prior to (or during) the correction amount of advancement of the label web along the label web path being conducted by the first motive apparatus for the labelling operation prior to the subsequent labelling operation.
  • the determined correction amount may be added to the movement required by the label web for the subsequent labelling operation.
  • the registration delay may be modified (e.g. from a conventional value which is utilised when there is no correction amount of advancement added to the movement required by the label web for the subsequent labelling operation), such that the registration delay is reduced by a time equivalent to that required for the label web and/or conveying device to move the determined correction amount during said subsequent labelling operation.
  • the registration delay may be reduced by a distance through which the conveying device will move (as monitored by said encoder for measuring the distance moved by the conveying device) equivalent to the determined correction amount.
  • the remaining portion of the correction amount at the time when the correction amount of advancement is stopped may be added to the movement required by the label web for the subsequent labelling operation.
  • the registration delay may be modified (e.g.
  • the registration delay is reduced by a time equivalent to that required for the label web and/or conveying device to move the remaining portion of the correction amount.
  • the registration delay may be reduced by a distance through which the conveying device should move (as monitored by said encoder for measuring the distance moved by the conveying device) equivalent to the remaining portion of the correction amount.
  • some embodiments require that the motive apparatus is controlled so as to decelerate the first motive apparatus between the first speed and rest such that the label web is brought to rest by the first motive apparatus at an intermediate position along the web path.
  • the controller then waits. After the controller has waited, based on a sensor signal produced by an encoder, the controller provides a control signal to the first motive apparatus to move the web along the web path by a correction amount to position the label web (and hence labels of the label web) at a desired position along the web path.
  • the controller controls the first motive apparatus to advance the web along the web path a predetermined distance by providing a control signal to the first motive apparatus which causes the first motive apparatus to advance the web along the web path by a distance which is less than the predetermined distance and wherein relaxation of the web after the web has been advanced along the web path by the first motive apparatus results in the web advancing along the web path a further distance.
  • An embodiment which combines the two previous embodiments is one in which the predetermined distance advanced in the second embodiment results in the label web being positioned at the desired position along the web path of the first embodiment.
  • the distance advanced by the label web in the second embodiment i.e. the sum of the distance which is less than the predetermined distance and the further distance due to web relaxation
  • the label web is advanced from the intermediate position, by the correction amount, to the desired position which corresponds to the predetermined distance.
  • the predetermined distance may be a distance the label web moves during a labelling operation.
  • printer i.e. relate to print and apply labelling machines
  • the invention may equally be applied to a labelling machine which does not include a printer.
  • controllers can take any suitable form.
  • control may be provided by one or more appropriately programmed microprocessors (having associated storage for program code, such storage including volatile and/or non volatile storage).
  • control may be provided by other control hardware such as, but not limited to, application specific integrated circuits (ASICs) and/or one or more appropriately configured field programmable gate arrays (FPGAs).
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays

Landscapes

  • Labeling Devices (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Claims (13)

  1. Machine d'étiquetage comprenant :
    un support de bobine d'alimentation (1a) pour supporter une bobine (1) d'une bande porteuse d'étiquettes ;
    un support de bobine de réception (3a) pour supporter une bobine de réception d'étiquettes (3) qui est adaptée de manière à ce qu'elle reçoive une section de bande ; et
    un premier appareil moteur (4) pour transporter la bande porteuse d'étiquettes le long d'une voie de bande entre le support de bobine d'alimentation et le support de bobine de réception ; et
    un contrôleur (10) qui est configuré de manière à ce qu'il applique un signal de commande sur le premier appareil moteur, caractérisée en ce que le contrôleur est en outre configuré de telle sorte que le contrôleur applique un signal de commande (10a) sur le premier appareil moteur de manière à ce qu'il accélère le premier appareil moteur, et en association, la bande porteuse d'étiquettes, entre une première vitesse et une seconde vitesse en appliquant un premier signal de commande sur le premier appareil moteur de manière à ce qu'il commande le premier appareil moteur de manière à ce qu'il accélère jusqu'à une première vitesse intermédiaire prédéterminée qui est intermédiaire par rapport aux première et seconde vitesses pendant une première période temporelle prédéterminée puis un deuxième signal de commande sur le premier appareil moteur de manière à ce qu'il accélère jusqu'à une seconde vitesse intermédiaire prédéterminée qui est intermédiaire par rapport à la première vitesse intermédiaire et à la seconde vitesse pendant une deuxième période temporelle prédéterminée puis un troisième signal de commande de manière à ce qu'il commande le premier appareil moteur de manière à ce qu'il accélère jusqu'à la seconde vitesse pendant une troisième période temporelle prédéterminée.
  2. Machine d'étiquetage selon la revendication 1, dans laquelle les première et seconde vitesses intermédiaires prédéterminées sont définies en tant que proportion de la seconde vitesse.
  3. Machine d'étiquetage selon la revendication 1, dans laquelle les première et seconde vitesses intermédiaires prédéterminées sont définies en tant que première vitesse plus une proportion de la différence entre les première et seconde vitesses.
  4. Machine d'étiquetage selon la revendication 1, dans laquelle la machine d'étiquetage inclut en outre un codeur (2a) qui est configuré de manière à ce qu'il produise un signal de capteur (2a) qui est indicatif de la vitesse de la bande d'étiquettes le long de la voie de bande.
  5. Machine d'étiquetage selon la revendication 4, dans laquelle le codeur (2a) est configuré de manière à ce qu'il surveille la rotation d'un rouleau qui définit une section de la voie de bande d'étiquettes.
  6. Machine d'étiquetage selon la revendication 5, dans laquelle la machine d'étiquetage inclut une imprimante qui comprend une tête d'impression qui est configurée de manière à ce qu'elle presse la bande d'étiquettes contre un rouleau d'impression afin de réaliser une impression, et dans laquelle le codeur (2a) est configuré de manière à ce qu'il surveille la rotation du rouleau d'impression.
  7. Machine d'étiquetage selon l'une quelconque des revendications 4 à 6, dans laquelle la vitesse prédéterminée respective est définie en tant que proportion de la seconde vitesse.
  8. Machine d'étiquetage selon l'une quelconque des revendications 4 à 6, dans laquelle la vitesse prédéterminée respective est définie en tant que première vitesse plus une proportion de la différence entre les première et seconde vitesses.
  9. Machine d'étiquetage selon la revendication 1, dans laquelle l'accélération pendant la première période temporelle et/ou la deuxième période temporelle et/ou la troisième période temporelle est une accélération prédéterminée.
  10. Machine d'étiquetage selon la revendication 1, dans laquelle :
    l'accélération pendant la première période temporelle est déterminée par le contrôleur (10) sur la base de la première vitesse et de la première vitesse intermédiaire ; et/ou dans laquelle :
    l'accélération pendant la deuxième période temporelle est déterminée par le contrôleur sur la base de la première vitesse intermédiaire et de la seconde vitesse intermédiaire ; et/ou
    dans laquelle l'accélération pendant la deuxième période temporelle est déterminée par le contrôleur sur la base de la première vitesse intermédiaire et de la seconde vitesse intermédiaire.
  11. Procédé de commande d'une machine d'étiquetage selon la revendication 1, le procédé comprenant :
    l'application, par le contrôleur, d'un signal de commande sur le premier appareil moteur de manière à ce qu'il accélère le premier appareil moteur, et en association, la bande porteuse d'étiquettes, entre une première vitesse et une seconde vitesse en réalisant les actions qui suivent : l'application d'un premier signal de commande sur le premier appareil moteur de manière à ce qu'il commande le premier appareil moteur de manière à ce qu'il accélère jusqu'à une première vitesse intermédiaire prédéterminée qui est intermédiaire par rapport aux première et seconde vitesses pendant une première période temporelle prédéterminée puis l'application d'un deuxième signal de commande sur le premier appareil moteur de manière à ce qu'il accélère jusqu'à une seconde vitesse intermédiaire prédéterminée qui est intermédiaire par rapport à la première vitesse intermédiaire et à la seconde vitesse pendant une deuxième période temporelle prédéterminée puis l'application d'un troisième signal de commande de manière à ce qu'il commande le premier appareil moteur de manière à ce qu'il accélère jusqu'à la seconde vitesse pendant une troisième période temporelle prédéterminée.
  12. Programme informatique comprenant des instructions qui peuvent être lues par un ordinateur et qui sont agencées de manière à ce qu'elles mettent en œuvre un procédé selon la revendication 11, lorsque le programme est exécuté par un contrôleur programmable.
  13. Support pouvant être lu par un ordinateur et comportant un programme informatique selon la revendication 12.
EP14787040.6A 2013-10-21 2014-10-16 Machine d'étiquetage et procédé de fonctionnement Active EP3060486B1 (fr)

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GB1318583.0A GB2519372B (en) 2013-10-21 2013-10-21 Machine and method of operation
PCT/GB2014/053106 WO2015059450A2 (fr) 2013-10-21 2014-10-16 Machine et procédé de fonctionnement

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WO2024028333A1 (fr) * 2022-08-01 2024-02-08 Dover Europe Sàrl Distributeur d'étiquettes et procédé de distribution d'étiquettes

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Also Published As

Publication number Publication date
CN105358440A (zh) 2016-02-24
EP3778410A1 (fr) 2021-02-17
GB2519372B (en) 2020-06-03
EP3060486A2 (fr) 2016-08-31
CN109928000B (zh) 2021-05-25
GB201318583D0 (en) 2013-12-04
WO2015059450A2 (fr) 2015-04-30
CN105358440B (zh) 2019-03-08
GB2519372A (en) 2015-04-22
WO2015059450A3 (fr) 2015-06-18
CN109928000A (zh) 2019-06-25

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