EP1437303B1 - Process and device for applying glue to packaging material - Google Patents

Process and device for applying glue to packaging material Download PDF

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Publication number
EP1437303B1
EP1437303B1 EP03029332A EP03029332A EP1437303B1 EP 1437303 B1 EP1437303 B1 EP 1437303B1 EP 03029332 A EP03029332 A EP 03029332A EP 03029332 A EP03029332 A EP 03029332A EP 1437303 B1 EP1437303 B1 EP 1437303B1
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EP
European Patent Office
Prior art keywords
glue
pressure
material web
control unit
blanks
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
EP03029332A
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German (de)
French (fr)
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EP1437303A2 (en
EP1437303B2 (en
EP1437303A3 (en
Inventor
Ingo Ferber
Thomas Kracke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Focke and Co GmbH and Co KG
Original Assignee
Focke and Co GmbH and Co KG
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Application filed by Focke and Co GmbH and Co KG filed Critical Focke and Co GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1023—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to velocity of target, e.g. to web advancement rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1005—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material already applied to the surface, e.g. coating thickness, weight or pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B65B51/023—Applying adhesives or sealing liquids using applicator nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/624—Applying glue on blanks

Definitions

  • the invention relates to a device for applying glue, in particular of the hotmelt type, to packaging material transported during the glue transfer, preferably to a continuous material web for producing blanks for packages, by means of glue nozzles with closable nozzle openings, which glue under pressure, namely under glue pressure, during a phase of the glue transfer to the packaging material can be fed, wherein the glue acting on the variable glue pressure in accordance with the conveying speed of the packaging material is adjustable by a controller.
  • Such a device is in DE 101 50 230 A1 shown and described. Especially for the consideration of different transport speeds of the glue receiving carrier material, an adaptation of the glue pressure should take place. For this purpose, the performance of an glue pump is changed, namely their speed.
  • a volume flow sensor is arranged in the line system for the supply of glue to aavesdüse. This controls a glue pump via a control unit whose power is changed to provide a constant amount of glue.
  • the invention has the object of providing a device for supplying glue to one or more glue nozzles in such a way that the glue pattern generated by the glue nozzles on the carrier corresponds exactly to the desired specifications with regard to the thickness of the glue layer.
  • the device according to the invention is characterized by the features of claim 1.
  • the setting of the glue pressure due to possibly several parameters with the aid of a glue unit or the glue nozzles associated pressure control valve.
  • this ensures an exact setting of the glue pressure and, moreover, enables a simple, effective integration of the glue unit into the automatic machine control.
  • programs for the production of certain glue surfaces or glue surface patterns for certain packages can be stored in the central control unit and retrieved as needed.
  • the invention relates to the gluing of a special blank, namely for cigarette packs.
  • Fig. 1 is to glue a blank of paper, coated paper or foil.
  • the blank is designed as outer wrapper for a cigarette pack, namely for a bundle pack 10 (cigarette rod).
  • the blank forms a front wall 11, a side wall 12 and a rear wall 13.
  • a side wall 12 opposite side wall consists of two overlapping folding flaps, namely edge strips 14, 15. These are connected to each other at (partial) overlap by glue.
  • the outer, wider edge strip 15 is provided for this purpose on the inside with glue, namely with a number of glue surfaces 16.
  • the elongated edge strip 15 is therefore not provided with a continuous glue strip, but with a plurality of spaced, rectangular glue surfaces 16, in the present case with six glue surfaces.
  • edge side end tabs 17 are provided and each outer cover of the end walls, a cover flap 18. Its dimensions correspond substantially to the dimensions of the end wall.
  • the cover flap 18 is delimited by adjacent end flap 17 by punching cuts 19. Also, the cover flap 18 has on its inside a gluing, namely an elongated glue strip 20th
  • the blank is separated during production of the bundle pack from a continuous material web 21 and fed to a folding turret 22.
  • the blank is folded directly around a group of cigarette packs or - as in the example shown - around an already formed bundle pack 10.
  • the on the blank ( Fig. 1 ) Glim vom 16 and glue strips 20 are made of hotmelt glue. This cured glue is activated after folding the edge strips 14, 15 or the end tabs 17, 18 by supplying heat and the folding tabs are connected to each other by pressure, in the region of the folding turret 22nd
  • the (originally) flowable glue is applied to the material web 21 by a glue unit 23.
  • the glue unit 23 has a glue nozzle 24, namely a slot die or a plurality of slot dies with a number of juxtaposed, slot-shaped nozzle openings 25, 26.
  • the glue unit 23 is positioned for this purpose in the region of a substantially upright track section 27 of the material web 21.
  • the downwardly conveyed material web 21 is applied or pressed at least during the duration of the transfer of glue to the glue unit 23, in the region of the nozzle openings 25, 26.
  • a movable, namely pivotable Andrückorgang 28 is provided which presses the web 21 temporarily to the glue nozzle 24.
  • the blanks ( Fig. 1 ) are positioned within the material web 21 so that the walls follow each other 11..15 in the conveying direction.
  • the glue patterns namely glue surfaces 16 on the one hand and glue strips 20 on the other hand are determined by the width of the nozzle openings 25, 26 transversely to the conveying direction and by the duration of the effectiveness or opening of the nozzle openings 25, 26, namely the dimension of the glue surfaces in the direction of movement the material web 21.
  • the edge-side nozzle openings 26 serve to transfer the glue strips 20 with a corresponding opening duration.
  • the juxtaposed glue surfaces 16 are created simultaneously by the corresponding number of nozzle openings 25, wherein the opening duration is correspondingly shorter.
  • Each nozzle opening 25, 26 or a plurality of nozzle openings 25 is associated with a shut-off valve, namely an (electric) valve 29, 30.
  • the two middle valves 29 are each assigned to a plurality of (three) nozzle openings 25 and the valves 30 are each assigned to the edge-side nozzle openings 26.
  • the valves 29 are controlled in response to the power stroke of the glue unit 23 and the packaging machine respectively, in the present particular embodiment of a (central) machine control 31 of the packaging machine.
  • Glue in particular in the hotmelt embodiment, is supplied to the glue unit 23 via a (common) glue line 32.
  • a glue line 32 This is preferably heated, namely when using hotmelt glue.
  • the glue is removed from a glue container 33 and pressed by an glue pump 34 into the glue line 32.
  • a relatively high pressure is generated, namely up to 20 bar.
  • the glue supply or the glue pump 34 is controlled by a control unit 35, which is connected via a signal line 36 to the machine control 31.
  • a special feature is the exact control of the delivered glue amounts, such that regardless of the relative movement between the material web 21 and glue unit 23 and irrespective of the properties of the glue, there is a constant or a glue transfer controllable with regard to the layer thickness to the packaging material.
  • the pressure exerted on the glue in the area of the glue nozzle 24 or in the area of the nozzle openings 25, 26, ie a glue pressure can be regulated.
  • the glue pressure is determined by a common pressure control valve 37. This is attached laterally to a housing of the glue unit 23 and determines the glue pressure for the entire glue nozzle 24 or for all nozzle openings 25, 26, in the region of the glue line 32. Alternatively, a plurality of individually controllable pressure control valves (in the glue unit 23) can be used to control individual or groups of nozzle orifices for effective glue pressure.
  • the glue pressure determined by the pressure regulating valve 37 is between 4 bar and a maximum of 20 bar.
  • the control of the pressure control valve 37 is effected by a compressed air regulator 38, which is connected via a compressed air line 39 to a compressed air source on the one hand and via a control air line 40 to the pressure control valve 37 on the other.
  • a special feature is the adjustability of the glue pressure by a data input member, in the embodiment of the Fig. 3 a PC 54.
  • This is connected via a signal line 55 to the control unit or the machine control 31.
  • a screen 56 shows the entered data, here with a graphical representation.
  • the PC 54 is set up to enter variable specifications or parameters, in particular the relevant for processing peculiarities of the glue, z. As the viscosity.
  • the desired layer thickness of the glue for the glue areas on the packaging material can be entered.
  • the glue pressure can be adjusted via the PC so that the glue strips 20 on the one hand and the glue surfaces 16 on the other hand have different layer thicknesses.
  • the opening duration and the opening stroke of the nozzle openings 25, 26 - in particular depending on the size of the blanks to be produced in each case - be entered into the machine control 31.
  • the conveying movement of the material web 21 is detected in the embodiment shown directly in the region of the material web 41.
  • a scanning member in particular one of two feed rollers 42 for the material web 21, is associated with a scanning member, namely a resolver 43, which detects the movement of the material web 21 on the basis of the rotational movement of the preferential roller 42.
  • the resolver 43 is over a signal line 44 is also connected to the machine controller 31. This therefore recognizes the movement of the web 21 in the (intermittent) preference.
  • the pressure regulating valve 37 is actuated via the compressed air regulator 38, such that in the glue nozzle 24 one of the movement and optionally further parameters corresponding glue pressure is generated.
  • the required opening duration of the nozzle openings 25, 26 is determined in an adapted manner by the valves 29, 30.
  • Fig. 4 shows a horizontal time axis 45 and a vertical velocity axis 46.
  • the recorded lines 47, 48, 49 relate to the velocity profile at different dimensions (sizes) of blanks and corresponding preferred lengths and conveying speeds of the web 21.
  • Line 47 shows the velocity profile at a larger one Cutting with a correspondingly higher maximum speed.
  • the line 49 refers to a smaller blank with corresponding motion characteristics.
  • FIG. 5 This includes the diagram according to Fig. 5 with horizontal time axis 45 and vertical pressure axis 50.
  • the lines 51, 52, 53 correspond in content to the lines 47, 48, 49 of FIG Fig. 4 , Shown is the pressure curve and the pressure level as a function of time.
  • Each of the lines 51, 52, 53 or curves may be one of the Curves or lines 47, 48, 49 of the diagram according to FIG Fig. 4 be assigned.
  • a working or movement cycle according to line 47, ie with a high maximum speed of the material web 41 a (pressure / time) line 53 may be assigned, so a relatively low pressure, if due to the set parameters, such as the Viscosity of the glue and / or the desired layer thickness a pressure curve corresponding to line 53 is appropriate.
  • the curves or lines 51, 52, 53 may have a non-uniform course to illustrate that according to the set program, the pressure during a work cycle, ie during a gluing phase, can change specifically.
  • a greater layer thickness of the glue strips 20 is desirable because they fix the fold in the end walls.
  • the glue surfaces 16 for connecting the edge strips 14, 15 may have a smaller layer thickness, because a sufficient fixation by the plurality of glue surfaces 16 can be achieved.
  • the glue pressure is controlled dynamically by adjusting to the actual conveying speed of the material web.
  • p is the speed-dependent glue pressure
  • p 1 is a set minimum pressure ( Fig. 5 )
  • m is a factor in accordance with the individually adjustable thickness of the glue layer
  • v is a number analogous to the web speed.
  • other parameters can also be taken into account, namely different layer thicknesses of glue surfaces.
  • the illustrated method of glue transfer to packaging material is also applicable to the promotion of individual, prefabricated blanks. Furthermore, an application in cyclically conveyed material webs makes sense if they run at a non-uniform speed, e.g. when starting and decelerating the packaging machine.

Abstract

As hot-melt glue is transferred onto a length of fabric for blanks, transfer of glue depends on the speed at which the length of fabric is feed through and on other parameters. Glue pressure applied to the glue is controlled in accordance with the movement of the length of material to be glued. This is done via a pressure control valve (37) linked to a central machine controller (31). An Independent claim is also included for a device for applying hot-melt glue/adhesive on a packaging production line.

Description

Die Erfindung betrifft eine Vorrichtung zum Aufbringen von Leim, insbesondere des Typs hotmelt, auf während der Leimübertragung transportiertes Verpackungsmaterial, vorzugsweise auf eine fortlaufende Materialbahn zum Herstellen von Zuschnitten für Packungen, mittels Leimdüsen mit verschließbaren Düsenöffnungen, denen Leim unter Druck, nämlich unter Leimdruck, während einer Phase der Leimübertragung auf das Verpackungsmaterial zuführbar ist, wobei der auf den Leim wirkende, veränderbare Leimdruck nach Maßgabe der Fördergeschwindigkeit des Verpackungsmaterials von einer Steuerung einstellbar ist.The invention relates to a device for applying glue, in particular of the hotmelt type, to packaging material transported during the glue transfer, preferably to a continuous material web for producing blanks for packages, by means of glue nozzles with closable nozzle openings, which glue under pressure, namely under glue pressure, during a phase of the glue transfer to the packaging material can be fed, wherein the glue acting on the variable glue pressure in accordance with the conveying speed of the packaging material is adjustable by a controller.

Eine solche Vorrichtung ist in DE 101 50 230 A1 dargestellt und beschrieben. Vor allem zur Berücksichtigung unterschiedlicher Transportgeschwindigkeiten des den Leim aufnehmenden Trägermaterials soll eine Anpassung des Leimdrucks erfolgen. Hierfür wird die Leistung einer Leimpumpe verändert, nämlich deren Drehzahl.Such a device is in DE 101 50 230 A1 shown and described. Especially for the consideration of different transport speeds of the glue receiving carrier material, an adaptation of the glue pressure should take place. For this purpose, the performance of an glue pump is changed, namely their speed.

Weiterhin ist bekannt, die einem Träger zuzuführende Leimmenge zu kontrollieren und gegebenenfalls die Zufuhr zu verändern, damit die Menge des zugeführten Leims konstant gehalten wird ( WO 02/43878 ). Zu diesem Zweck ist im Leitungssystem für die Zufuhr des Leims zu einer Auftragsdüse ein Volumenstromsensor angeordnet. Dieser steuert über eine Kontrolleinheit eine Leimpumpe, deren Leistung zur Bereitstellung einer konstanten Leimmenge verändert wird.Furthermore, it is known to control the amount of glue to be supplied to a carrier and if necessary to change the feed so that the amount of glue supplied is kept constant ( WO 02/43878 ). For this purpose, a volume flow sensor is arranged in the line system for the supply of glue to a Auftragdüse. This controls a glue pump via a control unit whose power is changed to provide a constant amount of glue.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zur Zuführung von Leim zu einer oder mehreren Leimdüsen so auszubilden, dass das durch die Leimdüsen auf dem Träger erzeugte Leimbild hinsichtlich der Dicke der Leimschicht exakt den gewünschten Vorgaben entspricht.The invention has the object of providing a device for supplying glue to one or more glue nozzles in such a way that the glue pattern generated by the glue nozzles on the carrier corresponds exactly to the desired specifications with regard to the thickness of the glue layer.

Zur Lösung dieser Aufgabe ist die erfindungsgemäße Vorrichtung durch die Merkmale vom Anspruch 1 gekennzeichnet.To solve this problem, the device according to the invention is characterized by the features of claim 1.

Bei der erfindungsgemäßen Vorrichtung erfolgt demnach die Einstellung des Leimdrucks aufgrund gegebenenfalls mehrerer Parameter mit Hilfe eines einem Leimaggregat bzw. den Leimdüsen zugeordneten Druckregelventils. Dies gewährleistet einerseits eine exakte Einstellung des Leimdrucks und ermöglicht darüber hinaus eine einfache, wirksame Einbindung des Leimaggregats in die automatische Maschinensteuerung.In the device according to the invention, therefore, the setting of the glue pressure due to possibly several parameters with the aid of a glue unit or the glue nozzles associated pressure control valve. On the one hand, this ensures an exact setting of the glue pressure and, moreover, enables a simple, effective integration of the glue unit into the automatic machine control.

Gemäß weiterer Merkmale der Erfindung ist vorgesehen, dass Programme für die Herstellung bestimmter Leimflächen bzw. Leimflächenmuster für bestimmte Verpackungen in der zentralen Steuereinheit hinterlegt und nach Bedarf abgerufen werden können.According to further features of the invention it is provided that programs for the production of certain glue surfaces or glue surface patterns for certain packages can be stored in the central control unit and retrieved as needed.

Schließlich bezieht sich die Erfindung auf die Beleimung eines besonderen Zuschnitts, nämlich für Zigaretten-Gebindepackungen.Finally, the invention relates to the gluing of a special blank, namely for cigarette packs.

Weitere Besonderheiten der Erfindung werden nachfolgend anhand der Zeichnungen näher erläutert. Es zeigt:

Fig. 1
einen ausgebreiteten Zuschnitt mit einem Leimbild,
Fig. 2
einen Teilbereich einer Verpackungsmaschine in schematischer Seitenansicht für die Herstellung von Zigarettenpackungen,
Fig. 3
ein Schaltbild einer Leimeinheit,
Fig. 4
ein Diagramm über den Bewegungsablauf einer Materialbahn,
Fig. 5
ein Diagramm für den Druckverlauf (Leimdruck) für einen Beleimungszyklus.
Other features of the invention will be explained in more detail with reference to the drawings. It shows:
Fig. 1
a spread blank with a glue image,
Fig. 2
a partial area of a packaging machine in a schematic side view for the production of cigarette packs,
Fig. 3
a circuit diagram of a glue unit,
Fig. 4
a diagram of the movement of a material web,
Fig. 5
a diagram for the pressure curve (glue pressure) for a gluing cycle.

Gemäß Fig. 1 ist ein Zuschnitt aus Papier, beschichtetem Papier oder Folie zu beleimen. Der Zuschnitt ist als Außenumhüllung für eine Zigarettenpackung konzipiert, nämlich für eine Gebindepackung 10 (Zigarettenstange). Der Zuschnitt bildet eine Vorderwand 11 eine Seitenwand 12 und eine Rückwand 13. Eine zur Seitenwand 12 gegenüberliegende Seitenwand besteht aus zwei einander überdeckenden Faltlappen, nämlich Randstreifen 14, 15. Diese werden bei (teilweiser) Überdeckung durch Leim miteinander verbunden. Der äußere, breitere Randstreifen 15 ist zu diesem Zweck an der Innenseite mit Leim versehen, nämlich mit einer Anzahl von Leimflächen 16. Der langgestreckte Randstreifen 15 ist demnach nicht mit einem durchgehenden Leimstreifen versehen, sondern mit einer Mehrzahl von im Abstand angeordneten, rechteckigen Leimflächen 16, und zwar im vorliegenden Falle mit sechs Leimflächen.According to Fig. 1 is to glue a blank of paper, coated paper or foil. The blank is designed as outer wrapper for a cigarette pack, namely for a bundle pack 10 (cigarette rod). The blank forms a front wall 11, a side wall 12 and a rear wall 13. A side wall 12 opposite side wall consists of two overlapping folding flaps, namely edge strips 14, 15. These are connected to each other at (partial) overlap by glue. The outer, wider edge strip 15 is provided for this purpose on the inside with glue, namely with a number of glue surfaces 16. The elongated edge strip 15 is therefore not provided with a continuous glue strip, but with a plurality of spaced, rectangular glue surfaces 16, in the present case with six glue surfaces.

Zur Bildung von einander gegenüberliegenden Stirnwänden der Gebindepackung 10 sind randseitige Stirnlappen 17 vorgesehen und jeweils als äußere Abdeckung der Stirnwände ein Decklappen 18. Dessen Abmessungen entsprechen im wesentlichen den Abmessungen der Stirnwand. Der Decklappen 18 ist von angrenzenden Stirnlappen 17 durch Stanzschnitte 19 abgegrenzt. Auch der Decklappen 18 weist an seiner Innenseite eine Beleimung auf, nämlich einen langgestreckten Leimstreifen 20.To form opposite end walls of the bundle pack 10 edge side end tabs 17 are provided and each outer cover of the end walls, a cover flap 18. Its dimensions correspond substantially to the dimensions of the end wall. The cover flap 18 is delimited by adjacent end flap 17 by punching cuts 19. Also, the cover flap 18 has on its inside a gluing, namely an elongated glue strip 20th

Der Zuschnitt wird bei der Fertigung der Gebindepackung von einer fortlaufenden Materialbahn 21 abgetrennt und einem Faltrevolver 22 zugeführt. Im Bereich desselben wird der Zuschnitt unmittelbar um eine Gruppe von Zigarettenpackungen oder - wie bei dem gezeigten Beispiel - um eine bereits gebildete Gebindepackung 10 herumgefaltet. Die an dem Zuschnitt (Fig. 1) angebrachten Leimflächen 16 und Leimstreifen 20 bestehen aus hotmelt-Leim. Dieser ausgehärtete Leim wird nach Falten der Randstreifen 14, 15 bzw. der Stirnlappen 17, 18 durch Zuführen von Wärme aktiviert und die Faltlappen durch Druck miteinander verbunden, und zwar im Bereich des Faltrevolvers 22.The blank is separated during production of the bundle pack from a continuous material web 21 and fed to a folding turret 22. In the area of the same, the blank is folded directly around a group of cigarette packs or - as in the example shown - around an already formed bundle pack 10. The on the blank ( Fig. 1 ) Glimflächen 16 and glue strips 20 are made of hotmelt glue. This cured glue is activated after folding the edge strips 14, 15 or the end tabs 17, 18 by supplying heat and the folding tabs are connected to each other by pressure, in the region of the folding turret 22nd

Der (ursprünglich) fließfähige Leim wird durch ein Leimaggregat 23 auf die Materialbahn 21 aufgebracht. Das Leimaggregat 23 weist eine Leimdüse 24 auf, und zwar eine Breitschlitzdüse bzw. mehrere Breitschlitzdüsen mit einer Anzahl von nebeneinander angeordneten, schlitzförmigen Düsenöffnungen 25, 26. Der Leim zur Schaffung der Leimflächen 16 bzw. Leimstreifen 20 wird durch Kontakt der Materialbahn 21 mit dem Leimaggregat bzw. den Düsenöffnungen 25, 26 übertragen. Das Leimaggregat 23 ist zu diesem Zweck im Bereich eines im Wesentlichen aufrechten Bahnabschnitts 27 der Materialbahn 21 positioniert. Die hier abwärts geförderte Materialbahn 21 wird mindestens während der Dauer der Übertragung von Leim an das Leimaggregat 23 angelegt bzw. angedrückt, und zwar im Bereich der Düsenöffnungen 25, 26. Zu diesem Zweck ist ein bewegbares, nämlich schwenkbares Andrückorgang 28 vorgesehen, welches die Materialbahn 21 zeitweilig an die Leimdüse 24 andrückt.The (originally) flowable glue is applied to the material web 21 by a glue unit 23. The glue unit 23 has a glue nozzle 24, namely a slot die or a plurality of slot dies with a number of juxtaposed, slot-shaped nozzle openings 25, 26. The glue for creating the glue surfaces 16 or glue strips 20 by contact of the material web 21 with the glue unit or the nozzle openings 25, 26 transmitted. The glue unit 23 is positioned for this purpose in the region of a substantially upright track section 27 of the material web 21. The downwardly conveyed material web 21 is applied or pressed at least during the duration of the transfer of glue to the glue unit 23, in the region of the nozzle openings 25, 26. For this purpose, a movable, namely pivotable Andrückorgang 28 is provided which presses the web 21 temporarily to the glue nozzle 24.

Die Zuschnitte (Fig. 1) sind innerhalb der Materialbahn 21 so positioniert, dass die Wandungen 11..15 in Förderrichtung aufeinander folgen. Die Leimbilder, nämlich Leimflächen 16 einerseits und Leimstreifen 20 andererseits werden zum Einen durch die Breite der Düsenöffnungen 25, 26 quer zur Förderrichtung und zum Anderen durch die Dauer der Wirksamkeit bzw. Öffnung der Düsenöffnungen 25, 26 bestimmt, nämlich die Abmessung der Leimflächen in Bewegungsrichtung der Materialbahn 21. Die randseitigen Düsenöffnungen 26 dienen zur Übertragung der Leimstreifen 20 bei entsprechender Öffnungsdauer. Die nebeneinander liegenden Leimflächen 16 werden gleichzeitig durch die entsprechende Anzahl von Düsenöffnungen 25 geschaffen, wobei deren Öffnungsdauer entsprechend kürzer ist.The blanks ( Fig. 1 ) are positioned within the material web 21 so that the walls follow each other 11..15 in the conveying direction. The glue patterns, namely glue surfaces 16 on the one hand and glue strips 20 on the other hand are determined by the width of the nozzle openings 25, 26 transversely to the conveying direction and by the duration of the effectiveness or opening of the nozzle openings 25, 26, namely the dimension of the glue surfaces in the direction of movement the material web 21. The edge-side nozzle openings 26 serve to transfer the glue strips 20 with a corresponding opening duration. The juxtaposed glue surfaces 16 are created simultaneously by the corresponding number of nozzle openings 25, wherein the opening duration is correspondingly shorter.

Eine exakte Steuerung und Regelung des Leimaggregats 23 ist für die Schaffung präziser Leimbilder wichtig. Jeder Düsenöffnung 25, 26 bzw. mehreren Düsenöffnungen 25 ist ein Absperrorgan zugeordnet, nämlich ein (elektrisches) Ventil 29, 30. Die beiden mittleren Ventile 29 sind je mehreren (drei) Düsenöffnungen 25 und die Ventile 30 jeweils den randseitigen Düsenöffnungen 26 zugeordnet. Die Ventile 29 werden in Abhängigkeit von dem Arbeitstakt des Leimaggregats 23 bzw. der Verpackungsmaschine gesteuert, und zwar bei dem vorliegenden besonderen Ausführungsbeispiel von einer (zentralen) Maschinensteuerung 31 der Verpackungsmaschine.Accurate control and regulation of the glue unit 23 is important for the creation of precise glue patterns. Each nozzle opening 25, 26 or a plurality of nozzle openings 25 is associated with a shut-off valve, namely an (electric) valve 29, 30. The two middle valves 29 are each assigned to a plurality of (three) nozzle openings 25 and the valves 30 are each assigned to the edge-side nozzle openings 26. The valves 29 are controlled in response to the power stroke of the glue unit 23 and the packaging machine respectively, in the present particular embodiment of a (central) machine control 31 of the packaging machine.

Leim, insbesondere in der Ausführung hotmelt, wird dem Leimaggregat 23 über eine (gemeinsame) Leimleitung 32 zugeführt. Diese ist vorzugsweise beheizt, nämlich bei Verwendung von hotmelt-Leim. Der Leim wird einem Leimbehälter 33 entnommen und durch eine Leimpumpe 34 in die Leimleitung 32 gedrückt. In der Leimleitung 32 wird ein verhältnismäßig hoher Druck erzeugt, nämlich bis zu 20 bar. Die Leimzufuhr bzw. die Leimpumpe 34 wird durch eine Steuereinheit 35 gesteuert, die über eine Signalleitung 36 mit der Maschinensteuerung 31 verbunden ist.Glue, in particular in the hotmelt embodiment, is supplied to the glue unit 23 via a (common) glue line 32. This is preferably heated, namely when using hotmelt glue. The glue is removed from a glue container 33 and pressed by an glue pump 34 into the glue line 32. In the glue line 32, a relatively high pressure is generated, namely up to 20 bar. The glue supply or the glue pump 34 is controlled by a control unit 35, which is connected via a signal line 36 to the machine control 31.

Eine Besonderheit ist die exakte Steuerung der abgegebenen Leimmengen, derart, dass unabhängig von der Relativbewegung zwischen Materialbahn 21 und Leimaggregat 23 und unabhängig von Eigenschaften des Leims eine konstante bzw. eine hinsichtlich der Schichtdicke steuerbare Leimübertragung auf das Verpackungsmaterial gegeben ist. Zu diesem Zweck ist der auf den Leim im Bereich der Leimdüse 24 bzw. im Bereich der Düsenöffnungen 25, 26 ausgeübte Druck, also ein Leimdruck, regelbar.A special feature is the exact control of the delivered glue amounts, such that regardless of the relative movement between the material web 21 and glue unit 23 and irrespective of the properties of the glue, there is a constant or a glue transfer controllable with regard to the layer thickness to the packaging material. For this purpose, the pressure exerted on the glue in the area of the glue nozzle 24 or in the area of the nozzle openings 25, 26, ie a glue pressure, can be regulated.

Der Leimdruck wird durch ein gemeinsames Druckregelventil 37 bestimmt. Dieses ist seitlich an ein Gehäuse des Leimaggregats 23 angesetzt und bestimmt den Leimdruck für die gesamte Leimdüse 24 bzw. für alle Düsenöffnungen 25, 26, und zwar im Bereich der Leimleitung 32. Alternativ können mehrere individuell ansteuerbare Druckregelventile (im Leimaggregat 23) eingesetzt werden, um einzelne oder Gruppen von Düsenöffnungen hinsichtlich des wirksamen Leimdrucks zu regeln. Der durch das Druckregelventil 37 bestimmt Leimdruck liegt zwischen 4 bar und maximal 20 bar.The glue pressure is determined by a common pressure control valve 37. This is attached laterally to a housing of the glue unit 23 and determines the glue pressure for the entire glue nozzle 24 or for all nozzle openings 25, 26, in the region of the glue line 32. Alternatively, a plurality of individually controllable pressure control valves (in the glue unit 23) can be used to control individual or groups of nozzle orifices for effective glue pressure. The glue pressure determined by the pressure regulating valve 37 is between 4 bar and a maximum of 20 bar.

Die Steuerung des Druckregelventils 37 erfolgt durch einen Druckluftregler 38, der über eine Druckluftleitung 39 mit einer Druckluftquelle einerseits und über eine Steuerluftleitung 40 mit dem Druckregelventil 37 andererseits verbunden ist.The control of the pressure control valve 37 is effected by a compressed air regulator 38, which is connected via a compressed air line 39 to a compressed air source on the one hand and via a control air line 40 to the pressure control valve 37 on the other.

Eine Besonderheit ist die Einstellbarkeit des Leimdrucks durch ein Dateneingabeorgan, bei dem Ausführungsbeispiel der Fig. 3 ein PC 54. Dieser ist über eine Signalleitung 55 mit der Steuereinheit bzw. der Maschinensteuerung 31 verbunden. Ein Bildschirm 56 zeigt die eingegebenen Daten, hier anhand einer graphischen Darstellung. Der PC 54 ist darauf eingerichtet, veränderliche Vorgaben bzw. Parameter einzugeben, insbesondere die für die Verarbeitung relevanten Besonderheiten des Leims, z. B. die Viskosität. Des Weiteren kann die erwünschte Schichtdicke des Leims für die Leimbereiche auf dem Verpackungsmaterial eingegeben werden. Dabei kann über den PC der Leimdruck so eingestellt werden, dass die Leimstreifen 20 einerseits und die Leimflächen 16 andererseits unterschiedliche Schichtdicken aufweisen. Auch kann die Öffnungsdauer und der Öffnungstakt der Düsenöffnungen 25, 26 - insbesondere in Abhängigkeit von der Größe der jeweils herzustellenden Zuschnitte - in die Maschinensteuerung 31 eingegeben werden.A special feature is the adjustability of the glue pressure by a data input member, in the embodiment of the Fig. 3 a PC 54. This is connected via a signal line 55 to the control unit or the machine control 31. A screen 56 shows the entered data, here with a graphical representation. The PC 54 is set up to enter variable specifications or parameters, in particular the relevant for processing peculiarities of the glue, z. As the viscosity. Furthermore, the desired layer thickness of the glue for the glue areas on the packaging material can be entered. In this case, the glue pressure can be adjusted via the PC so that the glue strips 20 on the one hand and the glue surfaces 16 on the other hand have different layer thicknesses. Also, the opening duration and the opening stroke of the nozzle openings 25, 26 - in particular depending on the size of the blanks to be produced in each case - be entered into the machine control 31.

Andere zu berücksichtigende Daten bzw. Parameter, so die jeweilige aktuelle Fördergeschwindigkeit des Verpackungsmaterials wird der Maschinensteuerung 31 anderweitig zugeführt.Other data or parameters to be considered, such as the respective current conveying speed of the packaging material, are fed to the machine controller 31 in another way.

Die Förderbewegung der Materialbahn 21 wird bei dem gezeigten Ausführungsbeispiel unmittelbar im Bereich der Materialbahn 41 erfasst. Zu diesem Zweck ist einem entsprechend der Fördergeschwindigkeit drehenden Organ, insbesondere einer von zwei Vorzugswalzen 42 für die Materialbahn 21, ein Abtastorgan zugeordnet, nämlich ein Resolver 43. Dieser erkennt die Bewegung der Materialbahn 21 anhand der Drehbewegung der Vorzugswalze 42. Der Resolver 43 ist über eine Signalleitung 44 ebenfalls mit der Maschinensteuerung 31 verbunden. Diese erkennt demnach den Bewegungsablauf der Materialbahn 21 bei dem (taktweisen) Vorzug. Danach wird über den Druckluftregler 38 das Druckregelventil 37 betätigt, derart, dass in der Leimdüse 24 ein der Bewegung und gegebenenfalls weiteren Parametern entsprechender Leimdruck erzeugt wird. Die erforderliche Öffnungsdauer der Düsenöffnungen 25, 26 wird in angepasster Weise durch die Ventile 29, 30 bestimmt.The conveying movement of the material web 21 is detected in the embodiment shown directly in the region of the material web 41. For this purpose, a scanning member, in particular one of two feed rollers 42 for the material web 21, is associated with a scanning member, namely a resolver 43, which detects the movement of the material web 21 on the basis of the rotational movement of the preferential roller 42. The resolver 43 is over a signal line 44 is also connected to the machine controller 31. This therefore recognizes the movement of the web 21 in the (intermittent) preference. Thereafter, the pressure regulating valve 37 is actuated via the compressed air regulator 38, such that in the glue nozzle 24 one of the movement and optionally further parameters corresponding glue pressure is generated. The required opening duration of the nozzle openings 25, 26 is determined in an adapted manner by the valves 29, 30.

Die Wechselbeziehung zwischen der Fördergeschwindigkeit der Materialbahn 21 sowie weiteren Parametern einerseits und dem entsprechenden Leimdruck ist graphisch in Fig. 4 und Fig. 5 anhand von Beispielen aufgezeigt.The correlation between the conveying speed of the web 21 and other parameters on the one hand and the corresponding glue pressure is graphically in 4 and FIG. 5 shown by examples.

Fig. 4 zeigt eine horizontale Zeitachse 45 und eine vertikale Geschwindigkeitsachse 46. Die aufgezeichneten Linien 47, 48, 49 beziehen sich auf den Geschwindigkeitsverlauf bei unterschiedlichen Abmessungen (Größen) von Zuschnitten und entsprechenden Vorzugslängen sowie Fördergeschwindigkeiten der Materialbahn 21. Die Linie 47 zeigt den Geschwindigkeitsverlauf bei einem größeren Zuschnitt mit entsprechend höherer Maximalgeschwindigkeit. Die Linie 49 bezieht sich auf einen kleineren Zuschnitt mit entsprechender Bewegungscharakteristik. Fig. 4 shows a horizontal time axis 45 and a vertical velocity axis 46. The recorded lines 47, 48, 49 relate to the velocity profile at different dimensions (sizes) of blanks and corresponding preferred lengths and conveying speeds of the web 21. Line 47 shows the velocity profile at a larger one Cutting with a correspondingly higher maximum speed. The line 49 refers to a smaller blank with corresponding motion characteristics.

Hierzu gehört das Diagramm gemäß Fig. 5 mit horizontaler Zeitachse 45 und vertikaler Druckachse 50. Die Linien 51, 52, 53 korrespondieren inhaltlich mit den Linien 47, 48, 49 der Fig. 4. Gezeigt ist der Druckverlauf und die Druckhöhe in Abhängigkeit von der Zeit. Jede der Linien 51, 52, 53 bzw. Kurven kann einer der Kurven bzw. Linien 47, 48, 49 des Diagramms gemäß Fig. 4 zugeordnet sein. Dies bedeutet, dass einem Arbeits- bzw. Bewegungszyklus gemäß Linie 47, also mit hoher Maximalgeschwindigkeit der Materialbahn 41 eine (Druck-/Zeit-)Linie 53 zugeordnet sein kann, also ein verhältnismäßig niedriger Druck, wenn auf Grund der eingestellten Parameter, etwa der Viskosität des Leims und/oder der erwünschten Schichtdicke ein Druckverlauf entsprechend Linie 53 angemessen ist. Weiterhin können die Kurven bzw. Linien 51, 52, 53 einen ungleichförmigen Verlauf haben, um darzustellen, dass entsprechend dem eingestellten Programm sich der Druck während eines Arbeitszyklus, also während einer Beleimungsphase, gezielt verändern kann. Unter Bezugnahme auf den Zuschnitt gemäß Fig. 1 ist eine größere Schichtdicke der Leimstreifen 20 erwünscht, weil diese die Faltung im Bereich der Stirnwände fixieren. Die Leimflächen 16 zum Verbinden der Randstreifen 14, 15 können eine geringere Schichtdicke aufweisen, weil eine ausreichende Fixierung durch die Mehrzahl der Leimflächen 16 erreichbar ist.This includes the diagram according to Fig. 5 with horizontal time axis 45 and vertical pressure axis 50. The lines 51, 52, 53 correspond in content to the lines 47, 48, 49 of FIG Fig. 4 , Shown is the pressure curve and the pressure level as a function of time. Each of the lines 51, 52, 53 or curves may be one of the Curves or lines 47, 48, 49 of the diagram according to FIG Fig. 4 be assigned. This means that a working or movement cycle according to line 47, ie with a high maximum speed of the material web 41 a (pressure / time) line 53 may be assigned, so a relatively low pressure, if due to the set parameters, such as the Viscosity of the glue and / or the desired layer thickness a pressure curve corresponding to line 53 is appropriate. Furthermore, the curves or lines 51, 52, 53 may have a non-uniform course to illustrate that according to the set program, the pressure during a work cycle, ie during a gluing phase, can change specifically. With reference to the blank according to Fig. 1 a greater layer thickness of the glue strips 20 is desirable because they fix the fold in the end walls. The glue surfaces 16 for connecting the edge strips 14, 15 may have a smaller layer thickness, because a sufficient fixation by the plurality of glue surfaces 16 can be achieved.

Der Leimdruck wird dynamisch unter Anpassung an die aktuelle Fördergeschwindigkeit der Materialbahn geregelt. Insbesondere wird zyklisch, z.B. in Abständen von 6 ms, die Drehwinkeländerung des Resolvers 43 festgestellt und in einen Geschwindigkeitswert umgerechnet. Aus diesem wird mit einem in der Steuerung hinterlegten Algorithmus der jeweilige Druckwert errechnet, und zwar im Wesentlichen nach einer Formel p = p 1 + m ⋅ v

Figure imgb0001
The glue pressure is controlled dynamically by adjusting to the actual conveying speed of the material web. In particular, the rotation angle change of the resolver 43 is detected cyclically, eg at intervals of 6 ms, and converted into a speed value. From this, the respective pressure value is calculated with an algorithm stored in the control, essentially according to a formula p = p 1 + m ⋅ v
Figure imgb0001

Wobei p der geschwindigkeitsabhängige Leimdruck, p1 ein eingestellter Minimaldruck (Fig. 5), m ein Faktor nach Maßgabe der individuell einstellbaren Dicke der Leimschicht und v eine Zahl analog der Bahngeschwindigkeit ist. Zusätzlich können auch weitere Parameter berücksichtigt sein, nämlich unterschiedliche Schichtdicken von Leimflächen.Where p is the speed-dependent glue pressure, p 1 is a set minimum pressure ( Fig. 5 ), m is a factor in accordance with the individually adjustable thickness of the glue layer and v is a number analogous to the web speed. In addition, other parameters can also be taken into account, namely different layer thicknesses of glue surfaces.

Das dargestellte Verfahren der Leimübertragung auf Verpackungsmaterial ist auch bei Förderung einzelner, vorgefertigter Zuschnitte anwendbar. Des weiteren ist eine Anwendung bei taktweise geförderten Materialbahnen sinnvoll, wenn diese mit ungleichförmiger Geschwindigkeit laufen, z.B. beim Anfahren und Verzögern der Verpackungsmaschine.The illustrated method of glue transfer to packaging material is also applicable to the promotion of individual, prefabricated blanks. Furthermore, an application in cyclically conveyed material webs makes sense if they run at a non-uniform speed, e.g. when starting and decelerating the packaging machine.

Claims (11)

  1. An apparatus for the application of glue, in particular glue of the hot-melt type, to packaging material transported during the application of glue, preferably to a continuous material web (21) used for the production of blanks, by means of glue nozzles (24) with closeable nozzle openings (25, 26), which can be supplied with glue under pressure, namely under glue pressure, during a phase of glue application onto the packaging material, it being possible for the glue pressure acting on the glue to be adjusted as determined by the conveying speed of the packaging material by means of a control unit (31), it being possible for the glue to be fed by a glue pump (34) through a glue line (32) to a glue assembly (23) equipped with the glue nozzles (24), characterized by the following features:
    a) the glue pressure in the glue assembly or in the region of the glue nozzles can be adjusted by a pressure control element (31) directly attached to the glue assembly (23), in particular by a pressure control valve (37),
    b) the pressure control element, in particular the pressure control valve (37), is connected to the common machine control unit (31) by means of control lines (40,41).
  2. The apparatus according to Claim 1, characterized in that the glue pressure can be adjusted with the help of a data input device (54), which is connected to the machine control unit via a signal line (55), it being possible to use the data input device (54) to adjust further parameters for the glue pressure, in particular the viscosity of the glue and/or a desired layer thickness of glue areas (16) or glue strips (20) on the packaging material, by altering the glue pressure accordingly.
  3. The apparatus according to Claim 1 or 2, characterized in that different glue regions of the packaging material, namely glue areas (16) on one hand, and, arranged offset to the latter, glue strips (20), on the other hand, are configured with different layer thicknesses which can be regulated by the pressure control valve according to the setting at the machine control unit (31).
  4. The apparatus according to Claim 1 or one of the further Claims" characterized in that the plotted course of the glue pressure during a gluing cycle for a blank or a corresponding section of the material web (21) is programmed according to the arrangement of the glue areas (16) or glue strips (20) as a function of the conveying speed of the blanks or the material web (21) and as a function of further parameters, namely the desired layer thickness of the glue and/or the viscosity of the glue by entering the corresponding data in the data input device (54) for the production of glued blanks or a glued material web.
  5. The apparatus according to Claim 1 or one of the further Claims, characterized by the following features:
    a) the conveying speed of the material web (21) can be determined by a scanning device in the region of a draw roller (42) which is assigned to the material web (21) and revolves with the material web (21),
    b) the scanning device is a resolver (43) which detects the rotational movement of the draw roller (42),
    c) the conveying speed of the material web (21) can be determined cyclically by measuring a change in the rotation angle of the resolver (43) and calculating a velocity value,
    d) the velocity value can be calculated with an algorithm stored in the machine control unit (31) to arrive at an adapted pressure value, namely glue pressure.
  6. The apparatus according to Claim 1 or one of the further Claims, characterized by the following features:
    a) stored in the machine control unit (31) are control programs for different glue shapes based on the type and/or size of the blanks or the corresponding sections of the material web (21) to be glued,
    b) the control programs are stored as control curves for a gluing cycle, namely as a velocity curve, on one hand, and as a pressure curve, on the other,
    c) the program required in each case can be called up from the machine control unit (31) by the data input device (54) as determined by the blanks to be produced or the material web (21) to be glued.
  7. The apparatus according to Claim 5 or one of the further Claims, characterized in that via the machine control unit (31) an additional control program for the timing and duration of opening the nozzle openings (25, 26) can be called up, specifically by regulating the valves (29) which are connected to the machine control unit (31) and which are assigned to each nozzle opening (25, 26) or group of nozzle openings (25, 26).
  8. The apparatus according to Claim 1 or one of the further Claims, characterized by the following features:
    a) the pressure control valve (37) can be regulated by compressed air via a control air line (40),
    b) the control air line (40) is connected to a compressed air control unit (38),
    c) the compressed air control unit (38) can be regulated by the machine control unit (31) by means of a signal line (41).
  9. The apparatus according to Claim 1 or one of the further Claims, characterized by the following features:
    a) a glue nozzle (24) having a plurality of nozzle openings (25, 26) is assigned a common pressure control valve (37),
    b) each nozzle opening (25, 26) is assigned a valve (29, 30) as a shut-off device such that the actual glue pressure as regulated in each case by the pressure control valve (37) is exerted in the region of the open nozzle opening (25, 26).
  10. The apparatus according to Claim 1 or one of the further Claims, characterized in that the nozzle openings (25, 26) of the glue assembly (23) are assigned individually controllable pressure control valves for regulating the glue pressure of individual nozzle openings (25, 26) or groups of nozzle openings (25, 26).
  11. A process for the manufacture of blanks as an outer wrapper for a bundle pack (10), with the blanks being severed from a material web (21) and folded around a group of cigarette packs, with the material web (21) being provided with glue areas (16) or glue strips (20) that are produced with an apparatus according to one or more of the claims 1 to 10, characterized by the following features:
    a) the material web (21) is provided with a row of spaced glue areas (16) directed transverse to the material web (21) in the region of a edge strip (15) of the blank to be produced,
    b) in the region of the same blank, glue strips (20) pointing in the direction of movement of the material web (21) are then applied opposite one another in the region of cover tabs (18) of the blank,
    c) the program for controlling the glue assembly is selected such that the glue areas (16), on one hand, and the glue strips (20), on the other hand, differ in their layer thickness, namely with the glue strips (20) having a greater layer thickness than the glue areas (16).
EP03029332A 2003-01-08 2003-12-19 Process and device for applying glue to packaging material Expired - Lifetime EP1437303B2 (en)

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JP (1) JP4510472B2 (en)
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CN1517274A (en) 2004-08-04
BRPI0400103A (en) 2004-12-28
JP2004210405A (en) 2004-07-29
US20040161531A1 (en) 2004-08-19
ATE432224T1 (en) 2009-06-15
BRPI0400103B1 (en) 2014-12-16
EP1437303A2 (en) 2004-07-14
EP1437303B2 (en) 2012-12-12
EP1437303A3 (en) 2006-02-01
JP4510472B2 (en) 2010-07-21
CN100393588C (en) 2008-06-11
DE50311548D1 (en) 2009-07-09

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