EP0503481B1 - Method for applying wrap-around labels to articles - Google Patents

Method for applying wrap-around labels to articles Download PDF

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Publication number
EP0503481B1
EP0503481B1 EP92103782A EP92103782A EP0503481B1 EP 0503481 B1 EP0503481 B1 EP 0503481B1 EP 92103782 A EP92103782 A EP 92103782A EP 92103782 A EP92103782 A EP 92103782A EP 0503481 B1 EP0503481 B1 EP 0503481B1
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EP
European Patent Office
Prior art keywords
labels
process according
carrier strip
corona discharge
discharge wire
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
EP92103782A
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German (de)
French (fr)
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EP0503481A1 (en
Inventor
Hans Peter Ast
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.)
Steinbeis Packaging GmbH
Steinbeis PPL GmbH
Original Assignee
Zweckform Etikettiertechnik GmbH
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Publication of EP0503481A1 publication Critical patent/EP0503481A1/en
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Classifications

    • 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
    • B65C9/0015—Preparing the labels or articles, e.g. smoothing, removing air bubbles
    • 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
    • B65C9/20—Gluing the labels or articles
    • B65C9/24—Gluing the labels or articles by heat

Definitions

  • the invention relates to a method for all-round labeling of objects, in particular cylindrical battery bodies, in which labels provided on the underside with a layer of pressure-sensitive adhesive are fed to the objects on a carrier tape on which they releasably adhere, in which the labels in front of the objects by deflecting the carrier tape from the Carrier tape can be released and in which the labels are glued to the objects and the lower edge areas of the labels in an overlap area on opposite upper edge areas of the same labels.
  • a pretreatment of surfaces to be labeled by flame, abrasion, corona treatment or glow discharge is known from DE-24 46 373 C2, a chemical pretreatment from the book by the buyer, Helmut, "Working with plastics", volume 2, processing, Berlin, Heidelberg , New York 1981, Table 8.4.
  • the object of the invention is to provide a method according to the preamble of claim 1, which avoids the lifting of the labels from each other in the overlapping areas in a simple manner.
  • the method is characterized in that the surface energy of the tops of the labels at least in the top edge areas to increase the adhesive strength of the pressure-sensitive adhesive layer on them is increased by at least one corona pretreatment immediately before the deflection.
  • At least one corona discharge wire is preferably arranged above the base plate at a distance from the labels on the carrier tape, transversely to the direction of movement of the carrier tape.
  • the overlap area has a width of 3 to 5 mm, so that a distance between the overlap area and the corona discharge wire of approximately 10 mm is particularly suitable in order to achieve a uniform pretreatment in the edge area mentioned.
  • the corona treatment with a corona discharge wire or each corona discharge wire should be 2 to 5 ms, preferably 3 to 4 ms.
  • the corona discharge wire with an electrical one Power from 100 W to 300 W per 100 mm length, preferably 150 to 200 W per 100 mm length at a voltage of 20 to 35 kV, in particular 25 to 30 kV, with a frequency of 15 to 25 kHz, in particular 18 to 22 kHz to feed.
  • the surface energy should be increased considerably, namely to more than 40 mN per m, in particular more than 45 mN per m.
  • the labels contain a metal layer, in particular a metal layer produced by vapor deposition and plastic layers adjacent to this metal layer, it can happen that the metal layers evaporate during the corona treatment and the plastic layers melt, as a result of which the labels are at least damaged on the edges.
  • the overlap regions are preferably made wider than those edge regions of the labels which can receive edge defects through the pretreatment.
  • a base plate 2 is shown in section, over which a carrier tape 4, on which there are labels 8 provided on the underside with a pressure-sensitive adhesive layer 6, is drawn around a deflection edge 10.
  • the labels 8 with their pressure-sensitive adhesive layer 6 detach from the carrier tape 4 in a known manner in order to be applied to objects to be labeled.
  • a corona discharge device is located above the base plate 2 12 with a shielding housing 14 and two corona discharge wires 16, 18 arranged in the direction of movement of the carrier tape 4.
  • the corona discharge wires 16, 18 are enclosed by quartz glass cylinders 20, 22.
  • the front upper edge regions 24, 26 of the labels in the direction of movement are corona-treated in two steps.
  • the dimensions and dimensions are preferably as stated above. Harmful gases released during the corona treatment are extracted by a suction device 28.
  • the corona treatment can also be carried out in such a way that it is used for other purposes.
  • the labels are still printed after they have been applied to the objects, for example by means of an inkjet printing process.
  • the compressive strength is increased if there are remnants of the corona treatment on the surfaces of the labels.

Abstract

The invention relates to a method for applying wrap-around labels to articles, especially to cylindrical battery bodies, in which method labels (8) whose undersides are coated with a contact adhesive layer (6) are stuck onto the articles, edge areas on the underside of the labels thus being stuck onto the opposite edge areas (24, 26) on the upper side of the same label in an overlap area, characterised in that the surface energy of the upper sides of the labels is increased, at least in the upper-side edge areas (24, 26), by means of a pretreatment, in order to increase the adhesive power of the contact adhesive layer on the said edge areas. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Rundumetikettieren von Gegenständen, insbesondere von zylindrischen Batteriekörpern, bei dem unterseitig mit einer Haftklebstoffschicht versehene Etiketten den Gegenständen auf einem Trägerband zugeführt werden, auf dem sie lösbar haften, bei dem die Etiketten vor den Gegenständen durch Umlenken des Trägerbands von dem Trägerband gelöst werden und bei dem die Etiketten auf die Gegenstände und dabei unterseitige Randbereiche der Etiketten in einem Überlappungsbereich auf gegenüberliegende oberseitige Randbereiche der jeweils gleichen Etiketten geklebt werden.The invention relates to a method for all-round labeling of objects, in particular cylindrical battery bodies, in which labels provided on the underside with a layer of pressure-sensitive adhesive are fed to the objects on a carrier tape on which they releasably adhere, in which the labels in front of the objects by deflecting the carrier tape from the Carrier tape can be released and in which the labels are glued to the objects and the lower edge areas of the labels in an overlap area on opposite upper edge areas of the same labels.

Bei einem aus der DE-34 30 162 C2 bekannten Verfahren dieser Art hat sich gezeigt, daß sich gelegentlich die Überlappungsbereiche bei hohen Rückstellkräften der Etiketten voneinander abheben, wenn die Rückstellkräfte größer sind als die Klebekraft in den genannten Überlappungsbereichen. Diese Rückstellkräfte sind u. a. von der Biegesteifagkeit der verwendeten Etiketten sowie von der Krümmung der zu etikettierenden Gegenstände in dem Überlappungsbereich abhängig.In a method of this type known from DE-34 30 162 C2, it has been shown that the overlap regions occasionally stand out from one another at high restoring forces of the labels if the restoring forces are greater than the adhesive force in the mentioned overlap regions. These restoring forces are u. a. dependent on the bending stiffness of the labels used and on the curvature of the objects to be labeled in the overlap area.

Eine Vorbehandlung von zu etikettierenden Oberflächen durch Beflammung, Abrasion, Koronabehandlung oder Glimmentladung ist aus der DE-24 46 373 C2 bekannt, eine chemische Vorbehandlung aus dem Buch von Käufer, Helmut, "Arbeiten mit Kunststoffen", Band 2, Verarbeitung, Berlin, Heidelberg, New York 1981, Tabelle 8.4.A pretreatment of surfaces to be labeled by flame, abrasion, corona treatment or glow discharge is known from DE-24 46 373 C2, a chemical pretreatment from the book by the buyer, Helmut, "Working with plastics", volume 2, processing, Berlin, Heidelberg , New York 1981, Table 8.4.

Aufgabe der Erfindung ist es, ein Verfahren nach dem Oberbegriff des Anspruchs 1 anzugeben, das das Abheben der Etiketten voneinander in den Überlappungsbereichen in einfacher Weise vermeidet.The object of the invention is to provide a method according to the preamble of claim 1, which avoids the lifting of the labels from each other in the overlapping areas in a simple manner.

Zur Lösung dieser Aufgabe ist das Verfahren dadurch gekennzeichnet, daß die Oberflächenenergie der Oberseiten der Etiketten wenigstens in den oberseitigen Randbereichen zur Erhöhung der Klebekraft der Haftklebstoffschicht an ihnen durch eine mindestens einmalige Korona-Vorbehandlung unmittelbar vor dem Umlenken erhöht wird.To achieve this object, the method is characterized in that the surface energy of the tops of the labels at least in the top edge areas to increase the adhesive strength of the pressure-sensitive adhesive layer on them is increased by at least one corona pretreatment immediately before the deflection.

Erfolgt das Umlenken des Trägerbands - wie an sich bekannt - am Ende einer Unterlagsplatte, so wird bevorzugt oberhalb der Unterlagsplatte in Abstand von den auf dem Trägerband befindlichen Etiketten wenigstens ein Koronaentladungsdraht quer zur Bewegungsrichtung des Trägerbands angeordnet.If the carrier tape is deflected, as is known per se, at the end of a base plate, at least one corona discharge wire is preferably arranged above the base plate at a distance from the labels on the carrier tape, transversely to the direction of movement of the carrier tape.

Dabei hat es sich bewährt, den Koronaentladungsdraht in einem dielektrischen Zylinder einzubetten. In der Praxis wurden besonders gute Ergebnisse erzielt, wenn das Verhältnis der Abmessungen von Abstand zwischen Etiketten und Koronaentladungsdraht zu Überlappungsbereich 0,5 bis 4, vorzugsweise 1 bis 2, beträgt und wenn der Durchmesser des dielektrischen Zylinders das 0,6- bis 1,4-fache, vorzugsweise das 0,8- bis 1,2-fache, des Abstands beträgt.It has proven useful to embed the corona discharge wire in a dielectric cylinder. In practice, particularly good results have been achieved if the ratio of the dimensions of the distance between the label and the corona discharge wire to the overlap area is 0.5 to 4, preferably 1 to 2, and if the diameter of the dielectric cylinder is 0.6 to 1.4 times, preferably 0.8 to 1.2 times, the distance.

In der Mehrzahl der Fälle hat der Uberlappungsbereich eine Breite von 3 bis 5 mm, so daß ein Abstand zwischen Überlappungsbereich und Koronaentladungsdraht von etwa 10 mm besonders geeignet ist, um eine gleichmäßige Vorbehandlung in dem genannten Randbereich zu erzielen.In the majority of cases, the overlap area has a width of 3 to 5 mm, so that a distance between the overlap area and the corona discharge wire of approximately 10 mm is particularly suitable in order to achieve a uniform pretreatment in the edge area mentioned.

Dabei sollte die Koronabehandlung mit einem Koronaentladungsdraht bzw. jedem Koronaentladungsdraht 2 bis 5 ms, vorzugsweise 3 bis 4 ms, betragen.The corona treatment with a corona discharge wire or each corona discharge wire should be 2 to 5 ms, preferably 3 to 4 ms.

Um die Oberflächenenergie hinreichend zu erhöhen, hat es sich bewährt, dem Koronaentladungsdraht eine elektrische Leistung von 100 W bis 300 W pro 100 mm Länge, vorzugsweise 150 bis 200 W pro 100 mm Länge bei einer Spannung von 20 bis 35 kV, insbesondere 25 bis 30 kV, mit einer Frequenz von 15 bis 25 kHz, insbesondere 18 bis 22 kHz, zuzuführen.In order to increase the surface energy sufficiently, it has proven useful to provide the corona discharge wire with an electrical one Power from 100 W to 300 W per 100 mm length, preferably 150 to 200 W per 100 mm length at a voltage of 20 to 35 kV, in particular 25 to 30 kV, with a frequency of 15 to 25 kHz, in particular 18 to 22 kHz to feed.

In der Regel soll die Oberflächenenergie erheblich erhöht werden, nämlich auf mehr als 40 mN pro m, insbesondere mehr als 45 mN pro m.As a rule, the surface energy should be increased considerably, namely to more than 40 mN per m, in particular more than 45 mN per m.

Enthalten die Etiketten eine Metallschicht, insbesondere eine durch Bedampfung erzeugte Metallschicht und an dieser Metallschicht angrenzende Kunststoffschichten, so kann es geschehen, daß die Metallschichten bei der Koronabehandlung verdampfen und die Kunststoffschichten schmelzen, wodurch die Etiketten wenigstens randseitig beschädigt werden. Um dennoch die erhöhte Oberflächenenergie aufbringen zu können, ohne daß solche Schäden am etikettierten Gegenstand bemerkbar und schädlich werden, werden bevorzugt die Uberlappungsbereiche breiter gemacht als diejenigen Randbereiche der Etiketten, die durch die Vorbehandlung Randfehler erhalten können.If the labels contain a metal layer, in particular a metal layer produced by vapor deposition and plastic layers adjacent to this metal layer, it can happen that the metal layers evaporate during the corona treatment and the plastic layers melt, as a result of which the labels are at least damaged on the edges. In order nevertheless to be able to apply the increased surface energy without such damage to the labeled object becoming noticeable and harmful, the overlap regions are preferably made wider than those edge regions of the labels which can receive edge defects through the pretreatment.

Im folgenden wird eine Vorrichtung zur Durchführung des Verfahrens unter Hinweis auf die beigefügten Zeichnung beschrieben.In the following an apparatus for performing the method is described with reference to the accompanying drawing.

In der Zeichnung ist im Schnitt eine Unterlagsplatte 2 dargestellt, über die ein Trägerband 4, auf dem sich unterseitig mit einer Haftklebstoffschicht 6 versehene Etiketten 8 befinden, um eine Umlenkkante 10 gezogen wird. An der Umlenkkante 10 lösen sich die Etiketten 8 mit ihrer Haftklebstoffschicht 6 in bekannter Weise vom Trägerband 4, um auf zu etikettierende Gegenstände aufgebracht zu werden.In the drawing, a base plate 2 is shown in section, over which a carrier tape 4, on which there are labels 8 provided on the underside with a pressure-sensitive adhesive layer 6, is drawn around a deflection edge 10. At the deflection edge 10, the labels 8 with their pressure-sensitive adhesive layer 6 detach from the carrier tape 4 in a known manner in order to be applied to objects to be labeled.

Über der Unterlagsplatte 2 ist eine Koronaentladungseinrichtung 12 mit einem Abschirmgehäuse 14 und in Bewegungsrichtung des Trägerbands 4 zwei Koronaentladungsdrähten 16, 18 angeordnet. Die Koronaentladungsdrähte 16, 18 sind von Quarzglaszylindern 20, 22 umschlossen.A corona discharge device is located above the base plate 2 12 with a shielding housing 14 and two corona discharge wires 16, 18 arranged in the direction of movement of the carrier tape 4. The corona discharge wires 16, 18 are enclosed by quartz glass cylinders 20, 22.

In dem dargestellten Zustand werden die in Bewegungsrichtung vorderen oberen Randbereiche 24, 26 der Etiketten in zwei Schritten koronabehandelt. Die Abmessungen und Bemessungen sind bevorzugt so, wie oben angegeben. Bei der Koronabehandlung freiwerdende schädliche Gase werden durch eine Absaugvorrichtung 28 abgesaugt.In the state shown, the front upper edge regions 24, 26 of the labels in the direction of movement are corona-treated in two steps. The dimensions and dimensions are preferably as stated above. Harmful gases released during the corona treatment are extracted by a suction device 28.

Die Koronabehandlung kann auch so durchgeführt werden, daß sie noch anderen Zwecken nutzt. Beispielsweise werden die Etiketten nach ihrem Aufbringen auf die Gegenstände noch bedruckt, etwa mittels eines Tintenstrahl-Druckverfahrens. Die Druckfestigkeit wird erhöht, wenn sich noch Reste der Koronabehandlung auf den Oberflächen der Etiketten befinden. Nicht nur aus einem solchen Grunde, sondern vor allem, um nicht sich voneinander abhebende Überlappungsbereiche der Etiketten zu erhalten, ist es erforderlich, die Vorbehandlung wenigstens der Randbereiche der Etiketten erst kurz vor dem Aufkleben der Etiketten auf die Gegenstände vorzunehmen, weil eine solche Vorbehandlung nur eine verhältnismäßig kurze Wirklebensdauer hat.The corona treatment can also be carried out in such a way that it is used for other purposes. For example, the labels are still printed after they have been applied to the objects, for example by means of an inkjet printing process. The compressive strength is increased if there are remnants of the corona treatment on the surfaces of the labels. Not only for such a reason, but above all, in order not to obtain overlapping areas of overlap of the labels, it is necessary to carry out the pretreatment of at least the edge areas of the labels only shortly before the labels are stuck onto the objects, because such pretreatment only has a relatively short working life.

Claims (8)

  1. Process for applying labels around objects, particularly cylindrical batteries, in which labels (8) provided with an adhesive layer (6) on their underside are delivered to the objects on a carrier strip (4) to which they adhere releasably, wherein the labels (8) are detached from the carrier strip (4) before the objects, by the deflection of the carrier strip (4), and wherein the labels (8) are stuck to the objects and at the same time underside edge areas of the labels (8) in an overlap area are stuck to opposing top side edge areas (24,26) of the same labels (8), characterised in that the surface energy of the top sides of the labels (8), at least in the top side edge areas (24,26), is increased immediately before the deflection by means of corona pre-treatment, carried out at least once, in order to increase the adhesiveness of the adhesive layer (6) on said labels.
  2. Process according to claim 1, wherein the deflection takes place at the end of a support plate (2) over which the carrier strip (4) is moved, characterised in that, above the support plate (2), at a spacing from the labels (8) located on the carrier strip (4), at least one corona discharge wire (16,18) is arranged at right angles to the direction of movement of the carrier strip (4).
  3. Process according to claim 2, characterised in that the corona discharge wire (16,18) is embedded in a dielectric cylinder (20,22).
  4. Process according to claim 2 or 3, characterised in that the ratio of the spacing between the labels (8) and the corona discharge wire (16,18) to the overlap area is 0.5 to 4, preferably 1 to 2, and the diameter of the dielectric cylinder (20,22) is 0.5 to 1.4, preferably 0.8 to 1.2 times the spacing.
  5. Process according to one of claims 2 to 4, characterised in that the duration of corona treatment with a corona discharge wire (16,18) is 2 to 5 ms, preferably 3 to 4 ms.
  6. Process according to one of claims 2 to 5, characterised in that an electric power of 100 W to 300 W per 100 mm of length, preferably 150 to 200 W per 100 mm of length, is supplied to the corona discharge wire (16,18) at a voltage of 20 to 35 kV, more especially 25 to 30 kV, at a frequency of 15 to 25 kHz, more especially 18 to 22 kHz.
  7. Process according to one of the preceding claims, characterised in that the surface energy is increased to more than 40 mN/m, more especially more than 45 mN/m.
  8. Process according to one of the preceding claims, characterised in that, in the case of labels (8) which contain a metal layer, the overlap area is wider than the edge portions of the labels (8) which may be defective around the edges as a result of the pre-treatment.
EP92103782A 1991-03-08 1992-03-05 Method for applying wrap-around labels to articles Expired - Lifetime EP0503481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4107531A DE4107531C1 (en) 1991-03-08 1991-03-08
DE4107531 1991-03-08

Publications (2)

Publication Number Publication Date
EP0503481A1 EP0503481A1 (en) 1992-09-16
EP0503481B1 true EP0503481B1 (en) 1994-07-20

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EP92103782A Expired - Lifetime EP0503481B1 (en) 1991-03-08 1992-03-05 Method for applying wrap-around labels to articles

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EP (1) EP0503481B1 (en)
AT (1) ATE108740T1 (en)
DE (2) DE4107531C1 (en)
ES (1) ES2057935T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314346A1 (en) * 1993-04-30 1994-11-03 Zweckform Etikettiertechnik Process for providing individual labels and for feeding these labels to molded parts
DE4316914A1 (en) * 1993-05-20 1994-11-24 Pacimex Verpackungen Gmbh Process for the production of labeled plastic objects, in particular containers and bottles
US5747192A (en) * 1995-06-07 1998-05-05 Avery Dennison Corporation Single ply PSA labels for battery applications
JP2002104349A (en) * 2000-10-04 2002-04-10 Fuji Seal Inc Method for adhering thermo adhesive label and pet bottle to which thermo adhesive label is adhered
CN110626585B (en) * 2019-08-20 2021-06-22 安徽春谷食品健康技术研究有限公司 Automatic labeling machine for food production

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2446373C2 (en) * 1973-09-28 1986-02-13 Dennison Mfg. Co., Framingham, Mass. Chemically resistant label that can be applied using heat
DE3430162C2 (en) * 1983-06-21 1988-10-06 Zweckform Etikettiertechnik Gmbh, 8150 Holzkirchen, De

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US1927476A (en) * 1931-12-05 1933-09-19 American Tobacco Co Surface treatment of sheet materials
US4548770A (en) * 1983-11-17 1985-10-22 Crown Zellerbach Corporation Subjecting film to corona discharge prior to compression rolling
EP0208261A2 (en) * 1985-07-12 1987-01-14 CERAMI COLOR Gesellschaft für Hartfaserbeschichtung m.b.H. Method and device for coating flat objects
NZ217648A (en) * 1985-11-04 1988-03-30 Owens Illinois Inc Apparatus for applying heat activatable adhesive labels to containers
US4724029A (en) * 1986-02-24 1988-02-09 Owens-Illinois, Inc. Method and apparatus for applying a flexible plastic label to a round container
US4944829A (en) * 1989-04-14 1990-07-31 Rorer Pharmaceutical Corporation Apparatus for applying wrappers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2446373C2 (en) * 1973-09-28 1986-02-13 Dennison Mfg. Co., Framingham, Mass. Chemically resistant label that can be applied using heat
DE3430162C2 (en) * 1983-06-21 1988-10-06 Zweckform Etikettiertechnik Gmbh, 8150 Holzkirchen, De

Also Published As

Publication number Publication date
EP0503481A1 (en) 1992-09-16
ES2057935T3 (en) 1994-10-16
DE4107531C1 (en) 1992-08-27
ATE108740T1 (en) 1994-08-15
DE59200286D1 (en) 1994-08-25

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