EP0176844B1 - Process and device for manufacturing a binding or the like, and binding - Google Patents

Process and device for manufacturing a binding or the like, and binding Download PDF

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Publication number
EP0176844B1
EP0176844B1 EP85111662A EP85111662A EP0176844B1 EP 0176844 B1 EP0176844 B1 EP 0176844B1 EP 85111662 A EP85111662 A EP 85111662A EP 85111662 A EP85111662 A EP 85111662A EP 0176844 B1 EP0176844 B1 EP 0176844B1
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EP
European Patent Office
Prior art keywords
melt adhesive
mould
hot
spine
cover
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EP85111662A
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German (de)
French (fr)
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EP0176844A3 (en
EP0176844A2 (en
Inventor
Peter Lázár
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Individual
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Individual
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Priority to AT85111662T priority Critical patent/ATE70227T1/en
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Publication of EP0176844A3 publication Critical patent/EP0176844A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D3/00—Book covers
    • B42D3/002—Covers or strips provided with adhesive for binding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C7/00—Manufacturing bookbinding cases or covers of books or loose-leaf binders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C9/00—Applying glue or adhesive peculiar to bookbinding
    • B42C9/0056—Applying glue or adhesive peculiar to bookbinding applying tape or covers precoated with adhesive to a stack of sheets

Definitions

  • the invention relates to a method for producing a cover or the like with at least one cover adjoining a cover spine, a hot-melt adhesive being applied to the inside of the cover spine and having been brought into a liquid or at least pasty state by prior heating.
  • the invention further relates to a device for performing this method and a cover of the aforementioned type.
  • Covers of the above type usually consist of a cover spine and fold-bound cover covers on the front and back. They are usually made of cardboard, and the front cover can also be made of a transparent plastic. Covers of this type are described for example in DE-PS 25 28 225 and DE-OS 22 37 583.
  • a hot melt adhesive is applied to the inside of the back cover.
  • Such hot melt adhesives are solid at room temperature, but - depending on their composition - become liquid at temperatures between 70 ° C and 190 ° C. After cooling, the hot melt adhesive returns to the solid state, this process being repeatable several times.
  • the above properties of the hot melt adhesive are used when binding paper sheets in such a cover.
  • the paper sheets are placed in the cover with their longitudinal edges perpendicular to the still hot melt adhesive and the cover is then brought into a binding device, as is known for example from DE-OS 27 43 685.
  • the cover then stands with its back on a heating plate that heats the hot melt adhesive through the back of the cover. After transition to the liquid state, the paper sheets penetrate into the hot melt adhesive so that their edges are enclosed by the hot melt adhesive. After cooling, the paper sheets are firmly connected to the back of the cover.
  • the covers described above come onto the market with the hot melt adhesive attached to the back of the cover.
  • two methods are known for applying the hot melt adhesive to the inside of the back cover.
  • the hot-melt adhesive is applied to the back of the cover in a liquid, that is to say heated, state using an adhesive application head which is connected to a storage container and a pump is connected (see. DE-OS 26 11 242; DE-OS 29 37 171).
  • This form of application has the advantage that raw material in granular form can be used for the hot melt adhesive, which is relatively cheap.
  • the hot melt adhesive applied in this way has a caterpillar shape, ie it is thicker towards the center than at the sides. The consequence of this is that, when later binding, the outer and therefore the most stressed paper sheets are kept in a too thin layer of hot-melt adhesive and are therefore easily detached. If, in addition, only a small number of sheets of paper are bound in relation to the width of the cover spine, the sheets of paper can slide outwards before the hot melt adhesive is heated, or at least tilt unevenly, which is also undesirable.
  • the hot-melt adhesive is placed in the form of a solid strip on the back of the cover and glued to it under the action of pressure and heat or using an additional adhesive.
  • This can be done by hand or by a method as described in DE-OS 30 10 642.
  • a hot melt adhesive strip previously cut from rolls or sheets is placed between two flexible strips that stand up on a base at a suitable distance from one another, then the cover is brought over such that its back is above the hot melt adhesive strip, and the cover is then pressed using a press stamp or a press roller against the bending strips and the hot-melt adhesive strip.
  • a press stamp or a press roller against the bending strips and the hot-melt adhesive strip.
  • the invention is therefore based on the object of designing a method for applying a hot-melt adhesive to a cover so that an exactly positioned hot-melt adhesive application which is uniform over length and width and has a desired cross section can be produced at the lowest possible cost. Another object is to find a device suitable for carrying out this method and a cover with a particularly favorable shape for the hot-melt adhesive application.
  • the first object is achieved in that the hot melt adhesive is introduced into a mold open on one of the long sides in the heated state, the cover is placed with the inside of the cover spine over the open side of the mold and the cover spine is pressed onto or into this mold.
  • the hot melt adhesive In the case of a narrow hot melt adhesive application, it may be sufficient if the hot melt adhesive is kept in shape only on its long sides, that is to say the end faces are open. Due to the then low hot melt adhesive entry, correct dosing can prevent the hot melt adhesive from flowing beyond the intended dimension at the end faces. To this extent, however, the procedure can be more precise, in particular when the hotmelt adhesive is applied more broadly, if the hotmelt adhesive is also given a shape on the end faces of the mold.
  • the hot-melt adhesive is heated to a temperature which is so far below the normal processing temperature before it is introduced into the mold that the hot-melt adhesive is in a state which is comparatively viscous compared to the fully liquid state at normal processing temperature.
  • the temperature of the hot melt adhesive when it is introduced into the mold should be 40% to 80%, preferably 60% of the normal processing temperature at which the hot melt adhesive is fully liquid, the aim being that the hot melt adhesive is only heated to the extent that it is suitable for its processing is just sufficiently viscous.
  • the invention further provides that when the binding spine is pressed into the mold, folds are formed on both longitudinal sides at the same time, so that the application of the hot melt adhesive and the formation of the folds can take place in one work step.
  • the device for carrying out the above-described method is formed by a mold formed by a base and side walls and open on one of the long sides, by a pressing device for pressing the spine of the cover into the open long side of the mold, by a heating device for liquefying the hot melt adhesive and by a feed device for the filling of the liquid hot melt adhesive marked in the mold.
  • a mold formed by a base and side walls and open on one of the long sides
  • a pressing device for pressing the spine of the cover into the open long side of the mold by a heating device for liquefying the hot melt adhesive and by a feed device for the filling of the liquid hot melt adhesive marked in the mold.
  • the side walls on the long sides of the mold are expediently designed as bending edges for embossing folds when the binding spine is pressed into the mold, as a result of which two work processes can be combined with one another.
  • the pressing device has a pressing die which is movable relative to the open long side of the mold.
  • the press ram should expediently be provided on its working side with an elastic layer so that, on the one hand, the best possible sealing is achieved at the edges of the mold and, on the other hand, the press ram can adapt to the amount of hot melt adhesive filled in.
  • a good seal is further supported if the upper edges of the side walls of the mold are assigned corresponding grooves in the working side of the press ram.
  • the hot melt adhesive can be given practically any desired cross section by appropriate formation of the From. It is advantageous to give the shape in the region of the central longitudinal axis a lower height than on the long sides.
  • a particularly preferred embodiment of a cover which cannot be produced by the known methods, can be produced by the device described above if the bottom of the cover is arched up in the shape of an arch. In this way, the hot melt adhesive application receives a trough-shaped depression on the side on which the paper sheet edges come to be when binding, which brings the paper sheets together towards the center and also holds them together.
  • the hot melt adhesive is thickest at the long edges, where the paper sheets are exposed to particularly high loads, which improves the hold of the paper sheets. Ultimately, this opens up the possibility of working with small hot melt adhesive thicknesses, i.e. saving hot melt adhesive.
  • the bottom of the mold be mounted interchangeably in order to enable different cross-sectional shapes and thicknesses if required. Furthermore, it may be expedient to arrange the bottom of the mold so that it can move towards and away from the open side.
  • the mold and feed device for introducing the hot melt adhesive are movable relative to one another.
  • the feed device can be arranged in a stationary manner.
  • the inner walls of the mold expediently consist of a non-ground steel alloy, since it has been found that the hot-melt adhesive can then be easily removed from the mold. This can also be supported by cooling the mold and / or by using a release agent which is added to the mold before the hot-melt adhesive is introduced.
  • the invention furthermore relates to a cover of the type mentioned at the outset, in which the hot-melt adhesive application is made thinner in the region of the central longitudinal axis than on its longitudinal edges, an arc-shaped depression to the central longitudinal axis being particularly advantageous.
  • a cross-section is favorable for hot-melt adhesive application, because then on the long side edges, where the paper sheets are exposed to particularly high loads, the most hot-melt adhesive is available for holding the paper sheets and also the paper sheets are brought together towards the center and be held together. This greatly reduces the error rate when binding the paper sheets.
  • GB-A-20 72 096 shows a cover whose hot-melt adhesive strip has a concave curvature on the free surface according to the drawing.
  • this curvature and its possible purpose were not considered. Rather, the U-shaped design of the spine is emphasized, which leads to the fact that the hot melt adhesive entry adheres to the side legs of the spine. Because of this special feature, this cover also does not pose the problem of improved hold of paper sheets in the edge region of the hot melt adhesive entry, which is the case with covers of the present type with hot melt adhesive application that is free from the back of the cover.
  • the device 1 shown schematically in FIG. 1 has a plate 2 which can only be seen here in part.
  • the plate 2 is through a center piece 3 in split two equal parts.
  • a mold 4 is attached, the long sides of which are formed from a base 5, two parallel and perpendicularly opposing long side walls 6, 7 and the opening on the top and which is closed at the end by likewise parallel and perpendicularly opposing end walls 8, 9.
  • the bottom 5 is arched up to the central longitudinal line, as can be seen even better from FIGS. 2 and 3.
  • a hot melt adhesive application head 10 is arranged in a stationary manner above the mold 4. It is shown here as a rectangular box because it is designed in the usual way. This can be, for example, a product of the H 200 type from Nordson Corp., Atlanta / USA. Below the hot-melt adhesive application head 10 there is a hot-melt adhesive nozzle 11, with the aid of which the previously processed in a heating device, not shown here, i.e. heated and thus at least in the pasty state hot melt adhesive can be filled into the mold 4.
  • the middle piece 3 can be pushed back and forth in the directions of the double arrow A, this being possible, for example, by means of a corresponding rail guide and driven by a hydraulic or pneumatic cylinder, not shown here.
  • the center piece 3 In the end position, ie after the hot melt adhesive has been filled in, the center piece 3 is again in the position shown here.
  • the cross-sectional view according to FIG. 2 shows the device 1 after a hot-melt adhesive bead 12 has been filled into the mold 4.
  • the hot-melt adhesive bead 12 has such a low temperature and is therefore so viscous that it does not flow, ie does not fill the mold 4.
  • the right side of the plate 2 in this view has a stop web 13, 14 in the longitudinal and transverse directions, to which a cover sheet can be aligned in relation to the form 4. This can be seen from the cross-sectional illustration according to FIG. 3.
  • a cover sheet 15 is placed over the form 4 so that it abuts the stop bar 13 with a longitudinal edge and the stop bar 14 with a transverse edge.
  • a press ram 16 which can be moved in the directions of the double arrow B presses the part of the cover sheet 15 located above the mold 4 slightly into this mold, as a result of which the bead of hot-melt adhesive 12 is evenly distributed within the mold 4 until it completely fills the cavity thus formed fills out.
  • the side walls 6, 7 folds 17, 18 emboss into the cover sheet 15, through which the latter is divided into a cover spine 19 and cover covers 20, 21 adjoining it on both sides.
  • the press ram 16 can be driven, for example, in a manner known per se via a hydraulic or pneumatic cylinder which is omitted here for the sake of clarity.
  • the press die 16 itself is constructed in two parts. It has a rigid press plate 22, on the underside of which a worktop 23 made of elastic material is fastened. The elasticity of this worktop 23 is such that the side walls 6, 7, 8, 9 penetrate it so deep that a good seal of the mold 4 is achieved and the binding spine 19 is pressed so deep into the mold 4 that the cavity is completely filled with hot melt adhesive 12.
  • the cover sheet 15 can be lifted up from the base 2 and thereby takes the hot melt adhesive 12 out of the mold 4. It then has the finished shape shown in FIG. 4. Due to the high arching of the bottom 5 of the form 4, the hot melt adhesive 12 has a trough-shaped depression 24 in cross section, which favors the holding together of the paper sheets placed on it when it is bonded and also ensures that the outer paper sheets are bound in a particularly thick hot melt adhesive layer.
  • the embossed folds 17, 18 can be seen, which separate the cover spine 19 from the cover covers 20, 21.

Abstract

An apparatus for the manufacture of a binding comprising a mold consisting of a bottom, at least one side wall, and an opening, means for positioning an adhesive in said mold, a stamp for forcing said binding into said opening, and said bottom of said mold being substantially arcuate in shape.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Einbandes oder dergleichen mit zumindest einem an einem Einbandrücken anschließenden Einbanddeckel, wobei auf die Innenseite des Einbandrückens ein Schmelzkleber aufgebracht wird, der durch vorheriges Erhitzen in flüssigen oder zumindest pastösen Zustand gebracht worden ist. Die Erfindung betrifft desweiteren eine Vorrichtung zur Durchführung dieses Verfahrens sowie einen Einband der vorgenannten Art.The invention relates to a method for producing a cover or the like with at least one cover adjoining a cover spine, a hot-melt adhesive being applied to the inside of the cover spine and having been brought into a liquid or at least pasty state by prior heating. The invention further relates to a device for performing this method and a cover of the aforementioned type.

Einbände der vorstehenden Gattung bestehen gewöhnlich aus einem Einbandrücken und sich daran über Falzen anschließenden Einbanddeckeln an der Frontund Rückseite. Sie sind meist aus Pappe gefertigt, wobei der Frontdeckel auch aus einem durchsichtigen Kunststoff bestehen kann. Einbände dieser Art sind beispielsweise in der DE-PS 25 28 225 und der DE-OS 22 37 583 beschrieben.Covers of the above type usually consist of a cover spine and fold-bound cover covers on the front and back. They are usually made of cardboard, and the front cover can also be made of a transparent plastic. Covers of this type are described for example in DE-PS 25 28 225 and DE-OS 22 37 583.

Auf der Innenseite des Einbandrückens ist ein Schmelzkleber aufgebracht. Solche Schmelzkleber sind bei Raumtemperatur fest, werden jedoch - je nach Zusammensetzung - bei Temperaturen zwischen 70°C und 190°C flüssig. Nach anschließender Abkühlung nimmt der Schmelzkleber wieder festen Zustand ein, wobei dieser Vorgang mehrfach wiederholbar ist.A hot melt adhesive is applied to the inside of the back cover. Such hot melt adhesives are solid at room temperature, but - depending on their composition - become liquid at temperatures between 70 ° C and 190 ° C. After cooling, the hot melt adhesive returns to the solid state, this process being repeatable several times.

Die vorstehenden Eigenschaften des Schmelzklebers werden beim Binden von Papierblättern in einem solchen Einband ausgenutzt. Hierzu werden die Papierblätter in den Einband mit ihren Längskanten lotrecht auf den noch festen Schmelzkleber gestellt und der Einband dann in ein Einbindegerät gebracht, wie es beispielsweise aus der DE-OS 27 43 685 bekannt ist. In diesem Gerät steht der Einband dann mit seinem Rücken auf einer Heizplatte, die den Schmelzkleber durch den Einbandrücken hindurch erhitzt. Nach Übergang in den flüssigen Zustand dringen die Papierblätter in den Schmelzkleber ein, so daß deren Kanten von dem Schmelzkleber umschlossen werden. Nach anschließendem Abkühlen sind die Papierblätter fest mit dem Einbandrücken verbunden.The above properties of the hot melt adhesive are used when binding paper sheets in such a cover. For this purpose, the paper sheets are placed in the cover with their longitudinal edges perpendicular to the still hot melt adhesive and the cover is then brought into a binding device, as is known for example from DE-OS 27 43 685. In this device, the cover then stands with its back on a heating plate that heats the hot melt adhesive through the back of the cover. After transition to the liquid state, the paper sheets penetrate into the hot melt adhesive so that their edges are enclosed by the hot melt adhesive. After cooling, the paper sheets are firmly connected to the back of the cover.

Die vorstehend beschriebenen Einbände kommen mit dem am Einbandrücken befestigten Schmelzkleber auf den Markt. Für das Aufbringen des Schmelzklebers auf die Innenseite des Einbandrückens sind dabei im Grundsatz zwei Verfahren bekannt.The covers described above come onto the market with the hot melt adhesive attached to the back of the cover. In principle, two methods are known for applying the hot melt adhesive to the inside of the back cover.

Bei dem ersten Verfahren wird der Schmelzkleber in flüssigem, also erhitztem Zustand auf den Einbandrücken aufgebracht, und zwar mit Hilfe eines Klebstoffauftragkopfes, der mit einem Vorratsbehälter und einer Pumpe in Verbindung steht (vgl. DE-OS 26 11 242; DE-OS 29 37 171). Diese Form des Auftrages hat den Vorteil, daß für den Schmelzkleber Rohmaterial in Granulatform verwendet werden kann, das relativ billig ist.In the first method, the hot-melt adhesive is applied to the back of the cover in a liquid, that is to say heated, state using an adhesive application head which is connected to a storage container and a pump is connected (see. DE-OS 26 11 242; DE-OS 29 37 171). This form of application has the advantage that raw material in granular form can be used for the hot melt adhesive, which is relatively cheap.

Allerdings bereitet es erhebliche Probleme, einen gleichmäßigen Schmelzkleberauftrag über die gesamte Länge des Einbandrückens zu erzeugen. Auf Grund der Oberflächenspannung des flüssigen Schmelzklebers hat nämlich der so aufgetragene Schmelzkleber eine Raupenform, ist also zur Mitte hin dicker als an den Seiten. Dies hat zur Folge, daß beim späteren Einbinden gerade die außenliegenden und deshalb am meisten beanspruchten Papierblätter in einer zu dünnen Schmelzkleberschicht gehalten sind und sich demnach leicht lösen. Wird zudem im Verhältnis zur Breite des Einbandrückens nur eine geringe Zahl von Papierblättern eingebunden, so können die Papierblätter vor dem Erhitzen des Schmelzklebers nach außen rutschen oder sich zumindest ungleichmäßig schrägstellen, was gleichfalls unerwünscht ist.However, it creates considerable problems to produce an even hot melt adhesive application over the entire length of the cover spine. Because of the surface tension of the liquid hot melt adhesive, the hot melt adhesive applied in this way has a caterpillar shape, ie it is thicker towards the center than at the sides. The consequence of this is that, when later binding, the outer and therefore the most stressed paper sheets are kept in a too thin layer of hot-melt adhesive and are therefore easily detached. If, in addition, only a small number of sheets of paper are bound in relation to the width of the cover spine, the sheets of paper can slide outwards before the hot melt adhesive is heated, or at least tilt unevenly, which is also undesirable.

Ein weiterer Nachteil des flüssigen Auftrages besteht darin, daß es nicht möglich ist, eine genau definierte Breite des Auftrages zu erhalten. Auch die für ein einwandfreies Einbinden notwendige, exakte Positionierung des Schmelzklebers kann nicht in gewünschtem Maße erreicht werden. Schließlich versagt das Verfahren auch bei sehr schmalem Schmelzkleberauftrag mit Breiten um und unter 1 mm. Insgesamt führt also der Schmelzkleberauftrag in flüssiger Form zu einem nicht befriedigenden, weil in mehrfacher Hinsicht ungenauen und nicht den Forderungen der Praxis entsprechenden Ergebnis.Another disadvantage of the liquid order is that it is not possible to get a precisely defined width of the order. Even the exact positioning of the hot melt adhesive required for perfect integration cannot be achieved to the desired extent. Finally, the process fails even with very narrow hot melt adhesive application with widths around and under 1 mm. Overall, the hot melt adhesive application in liquid form leads to an unsatisfactory because in several ways imprecise and not the requirements practical result.

Insoweit bessere Resultate lassen sich mit einem Verfahren erzielen, bei dem der Schmelzkleber in Form eines festen Streifens auf den Einbandrücken aufgelegt und mit diesem unter Einwirkung von Druck und Hitze oder unter Verwendung eines zusätzlichen Klebstoffs aufgeklebt wird. Dies kann in Handarbeit oder durch ein Verfahren geschehen, wie es in der DE-OS 30 10 642 beschrieben ist. Bei diesem Verfahren wird ein zuvor von Rollen oder aus Blättern zugeschnittener Schmelzkleberstreifen zwischen zwei in passendem Abstand zueinander auf einer Unterlage hochstehenden Biegeleisten gelegt, dann der Einband so darüber gebracht, daß sich sein Rücken oberhalb des Schmelzkleberstreifens befindet, und der Einband dann mit Hilfe eines Preßstempels oder einer Preßrolle gegen die Biegeleisten und den Schmelzkleberstreifen gedrückt. Dabei wird nicht nur die Verbindung zwischen Einbandrücken und Schmelzkleber hergestellt, sondern werden gleichzeitig auch die Falzen zum Umbiegen der Einbanddeckel gegenüber dem Einbandrücken gebildet.In this respect, better results can be achieved with a method in which the hot-melt adhesive is placed in the form of a solid strip on the back of the cover and glued to it under the action of pressure and heat or using an additional adhesive. This can be done by hand or by a method as described in DE-OS 30 10 642. In this method, a hot melt adhesive strip previously cut from rolls or sheets is placed between two flexible strips that stand up on a base at a suitable distance from one another, then the cover is brought over such that its back is above the hot melt adhesive strip, and the cover is then pressed using a press stamp or a press roller against the bending strips and the hot-melt adhesive strip. Not only is the connection between the cover spine and the hot melt adhesive established, but at the same time the folds for bending the cover cover relative to the cover spine are formed.

Mit diesem Verfahren wird zwar ein gegenüber dem flüssigen Auftrag genauer positionierter und gleichmäßig dicker Schmelzkleberstreifen auf dem Einbandrücken erhalten. Dies wird jedoch mit einem erheblich höheren Herstellungsaufwand erkauft. Dieser ist zum einen dadurch bedingt, daß das in Form von Rollen oder Blättern vorliegende Rohmaterial für den Schmelzkleber bis zu doppelt so teuer ist wie das Rohmaterial für den flüssigen Auftrag. Zum anderen entsteht zusätzlicher Aufwand für die Verarbeitung des Schmelzklebers in die gewünschte Streifenform, wobei sich dieser Aufwand teilweise auch nicht automatisieren läßt.With this method, a more precisely positioned and evenly thick hot melt adhesive strip is obtained on the back of the cover compared to the liquid application. However, this is bought with a significantly higher manufacturing cost. This is due, on the one hand, to the fact that the raw material in the form of rolls or sheets for the hot-melt adhesive is up to twice as expensive as the raw material for the liquid application. On the other hand, there is additional processing effort the hot melt adhesive into the desired strip shape, although this effort cannot be automated in some cases.

Der Erfindung liegt demnach die Aufgabe zugrunde, ein Verfahren zum Aufbringen eines Schmelzklebers auf einen Einband so zu gestalten, daß mit möglichst geringen Kosten ein exakt positionierter, über Länge und Breite gleichmäßiger und einen gewünschten Querschnitt aufweisender Schmelzkleberauftrag erzeugt werden kann. Eine weitere Aufgabe besteht darin, eine zur Durchführung dieses Verfahrens geeignete Vorrichtung sowie einen Einband mit einer besonders günstigen Formgebung des Schmelzkleberauftrages zu finden.The invention is therefore based on the object of designing a method for applying a hot-melt adhesive to a cover so that an exactly positioned hot-melt adhesive application which is uniform over length and width and has a desired cross section can be produced at the lowest possible cost. Another object is to find a device suitable for carrying out this method and a cover with a particularly favorable shape for the hot-melt adhesive application.

Die erste Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Schmelzkleber in erhitztem Zustand in eine an einer der Längsseiten offenen Form eingebracht, der Einband mit der Innenseite des Einbandrückens über die offene Seite der Form gelegt und der Einbandrücken auf bzw. in diese Form gepreßt wird.The first object is achieved in that the hot melt adhesive is introduced into a mold open on one of the long sides in the heated state, the cover is placed with the inside of the cover spine over the open side of the mold and the cover spine is pressed onto or into this mold.

Dieses Verfahren erlaubt es, einen exakt den Anforderungen entsprechenden Schmelzkleberauftrag trotz Verarbeitung in flüssiger Form zu erzeugen. Es kann also auf das erheblich preiswertere Rohmaterial in Granulatform zurückgegriffen werden, ohne daß dabei die bisher beim flüssigen Auftrag auftretenden Nachteile erkauft werden müssen. Dabei besteht die Möglichkeit, dem Schmelzkleber durch entsprechende Ausbildung der Form praktisch jeden gewünschten Querschnitt zu geben und diesen beliebig oft zu reproduzieren. Man muß also nicht die ungünstige Querschnittsform, wie sie bei den bisherigen Verfahren mit flüssigem Auftrag auftraten, in Kauf nehmen und ist auch nicht an den Rechteckquerschnitt gebunden, der bei dem Verfahren nach der DE-OS 30 10 642 zwangsläufig anfällt.This process enables a hot melt adhesive application to be produced exactly in accordance with the requirements, despite processing in liquid form. It is therefore possible to fall back on the significantly cheaper raw material in granular form without having to buy the disadvantages previously encountered in the liquid application. It is possible to give the hot melt adhesive practically any desired cross section by appropriate design of the shape and to reproduce it as often as desired. So you do not have to accept the unfavorable cross-sectional shape, such as occurred in the previous methods with liquid application, and is not tied to the rectangular cross-section that is inevitable in the method according to DE-OS 30 10 642.

Ein weiterer Vorteil besteht darin, daß der Schmelzklebereintrag in die Form - was die Verteilung angeht - nicht so exakt erfolgen muß wie bei den bekannten Verfahren mit flüssigem Auftrag. Beim Aufpressen des Einbandrückens auf die Form verteilt sich nämlich der eingefüllte Schmelzkleber sofort und völlig gleichmäßig und nimmt dabei die durch die Form vorgegebene Gestaltung an. Durch Variation der eingebrachten Menge Schmelzkleber läßt sich deshalb auch auf einfache Weise die gewünschte Dicke des Streifens ohne Wechsel der Form einstellen. Schließlich eignet sich dieses Verfahren besonders gut für eine automatische Fertigung des Einbandes.Another advantage is that the hot melt adhesive entry into the mold - as far as the distribution is concerned - does not have to be as precise as in the known methods with liquid application. When the back cover is pressed onto the form, the filled hot melt adhesive is immediately and completely evenly distributed, taking on the design given by the form. By varying the amount of hot melt adhesive introduced, the desired thickness of the strip can therefore also be set in a simple manner without changing the shape. Finally, this method is particularly well suited for the automatic production of the cover.

Bei schmalem Schmelzkleberauftrag kann es ausreichen, wenn der Schmelzkleber in der Form lediglich an seinen Längsseiten formgebend gehalten ist, die Stirnseiten also offen sind. Aufgrund des dann geringen Schmelzklebereintrags kann durch richtige Dosierung vermieden werden, daß der Schmelzkleber an den Stirnseiten über das vorgesehene Maß hinausfließt. Insoweit präziser kann jedoch insbesondere bei breiterem Schmelzkleberauftrag verfahren werden, wenn der Schmelzkleber auch an den Stirnseiten der Form formgebend gehalten wird.In the case of a narrow hot melt adhesive application, it may be sufficient if the hot melt adhesive is kept in shape only on its long sides, that is to say the end faces are open. Due to the then low hot melt adhesive entry, correct dosing can prevent the hot melt adhesive from flowing beyond the intended dimension at the end faces. To this extent, however, the procedure can be more precise, in particular when the hotmelt adhesive is applied more broadly, if the hotmelt adhesive is also given a shape on the end faces of the mold.

In weiterer Ausbildung der Erfindung ist vorgesehen, daß der Schmelzkleber vor dem Einbringen in die Form auf eine Temperatur erhitzt wird, die so weit unterhalb der normalen Verarbeitungstemperatur liegt, daß der Schmelzkleber in einem gegenüber dem voll-flüssigen Zustand bei normaler Verarbeitungstemperatur vergleichsweise zähflüssigen Zustand vorliegt. Dabei sollte die Temperatur des Schmelzklebers beim Einbringen in die Form 40% bis 80%, vorzugsweise 60% der normalen Verarbeitungstemperatur, bei der der Schmelzkleber voll-flüssig ist, betragen, wobei anzustreben ist, daß der Schmelzkleber nur soweit erhitzt wird, daß er für seine Verarbeitung gerade noch hinreichend viskos ist.In a further embodiment of the invention, that the hot-melt adhesive is heated to a temperature which is so far below the normal processing temperature before it is introduced into the mold that the hot-melt adhesive is in a state which is comparatively viscous compared to the fully liquid state at normal processing temperature. The temperature of the hot melt adhesive when it is introduced into the mold should be 40% to 80%, preferably 60% of the normal processing temperature at which the hot melt adhesive is fully liquid, the aim being that the hot melt adhesive is only heated to the extent that it is suitable for its processing is just sufficiently viscous.

Dem liegt die zur Erfindung gehörende Erkenntnis zugrunde, daß es nicht erforderlich ist, den Schmelzklebstoff so flüssig einzubringen, daß er sich innerhalb der Form selbst verteilt. Durch das Hineindrücken des Einbandrückens in die Form wird nämlich eine gleichmäßige Verteilung erzielt. Dabei hat sich überraschenderweise gezeigt, daß sich der Schmelzkleber bei diesen Temperaturen leicht aus der Form lösen läßt, ohne daß ein Abkühlen abgewartet werden muß. Andererseits haftet er jedoch hinreichend fest an der Innenseite des Einbandrückens, um durch dessen Anheben mit diesem zusammen aus der Form herausgenommen werden zu können.This is based on the knowledge belonging to the invention that it is not necessary to introduce the hot melt adhesive so liquid that it distributes itself within the mold. By pushing the cover back into the form, an even distribution is achieved. It has surprisingly been found that the hot melt adhesive can be easily removed from the mold at these temperatures without having to wait for cooling. On the other hand, however, it adheres sufficiently firmly to the inside of the spine of the cover that it can be removed from the mold by lifting it.

Die Erfindung sieht ferner vor, daß beim Eindrücken des Einbandrückens in die Form gleichzeitig auch Falzen zu beiden Längsseiten ausgebildet werden, so daß das Aufbringen des Schmelzklebers und das Ausbilden der Falzen in einem Arbeitsschritt vonstatten gehen kann.The invention further provides that when the binding spine is pressed into the mold, folds are formed on both longitudinal sides at the same time, so that the application of the hot melt adhesive and the formation of the folds can take place in one work step.

Die Vorrichtung zur Durchführung des vorbeschriebenen Verfahrens ist durch eine durch einen Boden und Seitenwände gebildeten, an einer der Längsseiten offenen Form, durch eine Preßeinrichtung zum Einpressen des Einbandrückens in die offene Längsseite der Form, durch eine Heizeinrichtung zur Verflüssigung des Schmelzklebers sowie durch eine Zuführeinrichtung für das Einfüllen des flüssigen Schmelzklebers in die Form gekennzeichnet. Dabei ist aus den vorbeschriebenen Gründen von Vorteil, wenn die Form stirnseitig Stirnseitenwände aufweist, die ein Fließen des Schmelzklebers in diesen Richtungen über das vorgesehene Maß verhindern. Auf diese Weise wird nach Auflegen des Einbandrückens eine geschlossene Form erzielt, die eine exakte Positionierung und Formgebung des Schmelzklebers bewirkt.The device for carrying out the above-described method is formed by a mold formed by a base and side walls and open on one of the long sides, by a pressing device for pressing the spine of the cover into the open long side of the mold, by a heating device for liquefying the hot melt adhesive and by a feed device for the filling of the liquid hot melt adhesive marked in the mold. For the reasons described above, it is advantageous if the shape has end walls on the end face, which prevent the hotmelt from flowing in these directions beyond the intended dimension. In this way, a closed shape is achieved after placing the back cover, which causes an exact positioning and shaping of the hot melt adhesive.

Zweckmäßigerweise sind die Seitenwände an den Längsseiten der Form als Biegekanten zum Einprägen von Falzen beim Hineindrücken des Einbandrückens in die Form ausgebildet, wodurch sich zwei Arbeitsvorgänge miteinander kombinieren lassen.The side walls on the long sides of the mold are expediently designed as bending edges for embossing folds when the binding spine is pressed into the mold, as a result of which two work processes can be combined with one another.

In weiterer Ausbildung der Erfindung ist vorgeschlagen, daß die Preßeinrichtung einen gegenüber der offenen Längsseite der Form bewegbaren Preßstempel aufweist. Zweckmäßigerweise sollte der Preßstempel an seiner Arbeitsseite mit einer elastischen Schicht versehen sein, damit einerseits eine möglichst gute Abdichtung an den Kanten der Form erzielt wird und andererseits sich der Preßstempel an die jeweils eingefüllte Menge Schmelzkleber anpassen kann.In a further embodiment of the invention it is proposed that the pressing device has a pressing die which is movable relative to the open long side of the mold. The press ram should expediently be provided on its working side with an elastic layer so that, on the one hand, the best possible sealing is achieved at the edges of the mold and, on the other hand, the press ram can adapt to the amount of hot melt adhesive filled in.

Eine gute Abdichtung wird noch dadurch unterstützt, wenn den Oberkanten der Seitenwände der Form entsprechende Nuten in der Arbeitsseite des Preßstempels zugeordnet sind.A good seal is further supported if the upper edges of the side walls of the mold are assigned corresponding grooves in the working side of the press ram.

Dem Schmelzkleber kann durch entsprechende Ausbildung der From praktisch jeder gewünschte Querschnitt gegeben werden. Vorteilhaft ist es, der Form im Bereich der Mittellängsachse eine geringere Höhe als an den Längsseiten zu geben. Eine besonders bevorzugte, mit den bekannten Verfahren nicht herstellbare Ausführungsform eines Einbandes läßt sich durch die vorbeschriebene Vorrichtung herstellen, wenn deren Boden zur Mittellängsache bogenförmig hochgewölbt wird. Auf diese Weise erhält der Schmelzkleberauftrag an der Seite, auf die die Papierblätterkanten beim Einbinden zu stehen kommen, im Querschnitt eine muldenförmige Vertiefung, die die Papierblätter zur Mitte hin zusammenführt und auch zusammenhält. Außerdem ist der Schmelzkleberauftrag an den Längsseitenrändern, wo die Papierblätter besonders hohen Belastungen ausgesetzt sind, am dicksten, wodurch der Halt der Papierblätter verbessert wird. Schließlich eröffnet dies die Möglichkeit, mit geringen Schmelzkleberdicken zu arbeiten, also Schmelzkleber einzusparen.The hot melt adhesive can be given practically any desired cross section by appropriate formation of the From. It is advantageous to give the shape in the region of the central longitudinal axis a lower height than on the long sides. A particularly preferred embodiment of a cover, which cannot be produced by the known methods, can be produced by the device described above if the bottom of the cover is arched up in the shape of an arch. In this way, the hot melt adhesive application receives a trough-shaped depression on the side on which the paper sheet edges come to be when binding, which brings the paper sheets together towards the center and also holds them together. In addition, the hot melt adhesive is thickest at the long edges, where the paper sheets are exposed to particularly high loads, which improves the hold of the paper sheets. Ultimately, this opens up the possibility of working with small hot melt adhesive thicknesses, i.e. saving hot melt adhesive.

In weiterer Ausgestaltung der Erfindung ist vorgeschlagen, daß der Boden der Form auswechselbar montiert ist, um bei Bedarf verschiedene Querschnittsformen und -dicken zu ermöglichen. Weiterhin kann es zweckmäßig sein, den Boden der Form zur offenen Seite hin und von dieser weg bewegbar anzuordnen.In a further embodiment of the invention, it is proposed that the bottom of the mold be mounted interchangeably in order to enable different cross-sectional shapes and thicknesses if required. Furthermore, it may be expedient to arrange the bottom of the mold so that it can move towards and away from the open side.

Nach der Erfindung ist desweiteren vorgesehen, daß Form und Zuführeinrichtung zum Einbringen des Schmelzklebers relativ zueinander bewegbar sind. Auf diese Weise kann die Zuführeinrichtung ortsfest angeordnet werden.According to the invention it is further provided that the mold and feed device for introducing the hot melt adhesive are movable relative to one another. In this way, the feed device can be arranged in a stationary manner.

Die Innenwandungen der Form bestehen zweckmäßigerweise aus einer nicht geschliffenen Stahllegierung, da sich herausgestellt hat, daß sich der Schmelzkleber dann sehr leicht aus der Form herauslösen läßt. Dies kann auch durch eine Kühlung der Form und/oder die Verwendung eines vor dem Schmelzklebereintrag in die Form gegebenen Trennmittels unterstützt werden.The inner walls of the mold expediently consist of a non-ground steel alloy, since it has been found that the hot-melt adhesive can then be easily removed from the mold. This can also be supported by cooling the mold and / or by using a release agent which is added to the mold before the hot-melt adhesive is introduced.

Gegenstand der Erfindung ist des weiteren ein Einband der eingangs genannten Art, bei dem der Schmelzkleberauftrag im Bereich der Mittellängsachse dünner ausgebildet ist als an seinen Längskanten, wobei besonders vorteilhaft eine bogenförmige Vertiefung zur Mittellängsachse ist. Wie schon oben dargelegt, ist ein solcher Querschnitt für den Schmelzkleberauftrag deshalb günstig, weil dann an den Längsseitenrändern, wo die Papierblätter besonders hohen Belastungen ausgesetzt sind, am meisten Schmelzkleber für den Halt der Papierblätter zur Verfügung steht und zudem die Papierblätter zur Mitte hin zusammengeführt und zusammengehalten werden. Hierdurch wird die Fehlerquote beim Enbinden der Papierblätter stark verringert.The invention furthermore relates to a cover of the type mentioned at the outset, in which the hot-melt adhesive application is made thinner in the region of the central longitudinal axis than on its longitudinal edges, an arc-shaped depression to the central longitudinal axis being particularly advantageous. As already explained above, such a cross-section is favorable for hot-melt adhesive application, because then on the long side edges, where the paper sheets are exposed to particularly high loads, the most hot-melt adhesive is available for holding the paper sheets and also the paper sheets are brought together towards the center and be held together. This greatly reduces the error rate when binding the paper sheets.

Zwar ist in der GB-A-20 72 096 ein Einband gezeigt, dessen Schmelzkleberstreifen laut der Zeichnung an der freien Oberfläche eine konkave Wölbung hat. In der Beschreibung dieser Druckschrift wird jedoch auf diese Wölbung und ihren eventuellen Zweck nicht eingegangen. Vielmehr wird die U-förmige Ausbildung des Einbandrückens hervorgehoben, die dazu führt, daß der Schmelzklebereintrag an den Seitenschenkeln des Einbandrückens anhaftet. Aufgrund dieser Besonderheit stellt sich bei diesem Einband auch nicht das Problem eines verbesserten Haltes von Papierblättern im Randbereich des Schmelzklebereintrages, das bei Einbänden der vorliegenden Gattung mit vom Einbandrücken frei hochstehenden Schmelzkleberauftrag gegeben ist.GB-A-20 72 096 shows a cover whose hot-melt adhesive strip has a concave curvature on the free surface according to the drawing. However, in the description of this publication this curvature and its possible purpose were not considered. Rather, the U-shaped design of the spine is emphasized, which leads to the fact that the hot melt adhesive entry adheres to the side legs of the spine. Because of this special feature, this cover also does not pose the problem of improved hold of paper sheets in the edge region of the hot melt adhesive entry, which is the case with covers of the present type with hot melt adhesive application that is free from the back of the cover.

In der Zeichnung ist die Erfindung an Hand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen:

Figur 1
eine perspektivische Ansicht einer Vorrichtung zum Herstellen von Einbänden;
Figur 2
einen Querschnitt durch die Vorrichtung gemäß Figur 1 nach dem Einbringen des Schmelzklebers und
Figur 3
einen Querschnitt durch die Vorrichtung gemäß Figur 2 beim Anpressen des Einbandes und
Figur 4
den fertigen Einband in perspektivischer Darstellung.
In the drawing, the invention is illustrated in more detail using an exemplary embodiment. Show it:
Figure 1
a perspective view of a device for producing covers;
Figure 2
a cross section through the device of Figure 1 after the introduction of the hot melt adhesive and
Figure 3
a cross section through the device of Figure 2 when pressing the cover and
Figure 4
the finished cover in perspective.

Die in Figur 1 schematisch dargestellte Vorrichtung 1 weist eine hier nur teilweise zu sehende Platte 2 auf. Die Platte 2 wird durch ein Mittelstück 3 in zwei gleiche Teile aufgeteilt.The device 1 shown schematically in FIG. 1 has a plate 2 which can only be seen here in part. The plate 2 is through a center piece 3 in split two equal parts.

Auf dem Mittelstück 3 ist eine Form 4 angebracht, deren Längsseiten aus einem Boden 5, zwei parallel und senkrecht gegenüberstehenden Längsseitenwänden 6, 7 und der obenseitigen Öffnung gebildet werden und die stirnseitig durch ebenfalls parallel und senkrecht gegenüberstehenden Stirnseitenwänden 8, 9 abgeschlossen wird. Der Boden 5 ist zur Mittellängslinie hochgewölbt, wie noch besser aus den Figuren 2 und 3 zu ersehen ist.On the middle piece 3, a mold 4 is attached, the long sides of which are formed from a base 5, two parallel and perpendicularly opposing long side walls 6, 7 and the opening on the top and which is closed at the end by likewise parallel and perpendicularly opposing end walls 8, 9. The bottom 5 is arched up to the central longitudinal line, as can be seen even better from FIGS. 2 and 3.

Oberhalb der Form 4 ist ein Schmelzkleberauftragskopf 10 ortsfest angeordnet. Er ist hier als rechteckiger Kasten dargestellt, da er in üblicher Weise ausgeführt ist. Es kann sich hier beispielsweise um ein Produkt der Fa. Nordson Corp., Atlanta/USA des Typs H 200 handeln. Unterhalb des Schmelzkleberauftragskopfes 10 befindet sich eine Schmelzkleberdüse 11, mit deren Hilfe der zuvor in einer hier nicht näher dargestellten Heizeinrichtung aufbereitete, d.h. erhitzte und damit zumindest in pastösem Zustand vorliegende Schmelzkleber in die Form 4 eingefüllt werden kann.A hot melt adhesive application head 10 is arranged in a stationary manner above the mold 4. It is shown here as a rectangular box because it is designed in the usual way. This can be, for example, a product of the H 200 type from Nordson Corp., Atlanta / USA. Below the hot-melt adhesive application head 10 there is a hot-melt adhesive nozzle 11, with the aid of which the previously processed in a heating device, not shown here, i.e. heated and thus at least in the pasty state hot melt adhesive can be filled into the mold 4.

Zur Verteilung des Schmelzklebers über die Länge der Form 4 ist das Mittelstück 3 in den Richtungen des Doppelpfeils A hin- und herschiebbar, wobei dies beispielsweise durch eine entsprechende Schienenführung und angetrieben durch einen hier nicht näher dargestellten Hydraulik- oder Pneumatikzylinder geschehen kann. In der Endstellung, also nach Einfüllen des Schmelzklebers, befindet sich das Mittelstück 3 wieder in der hier gezeigten Stellung.To distribute the hot melt adhesive over the length of the mold 4, the middle piece 3 can be pushed back and forth in the directions of the double arrow A, this being possible, for example, by means of a corresponding rail guide and driven by a hydraulic or pneumatic cylinder, not shown here. In the end position, ie after the hot melt adhesive has been filled in, the center piece 3 is again in the position shown here.

Die Querschnittsdarstellung gemäß Figur 2 zeigt die Vorrichtung 1 nach Einfüllen einer Schmelzkleberraupe 12 in die Form 4. Die Schmelzkleberraupe 12 hat eine so niedrige Temperatur und ist deshalb so zähflüssig, daß sie nicht zerfließt, also die Form 4 nicht ausfüllt.The cross-sectional view according to FIG. 2 shows the device 1 after a hot-melt adhesive bead 12 has been filled into the mold 4. The hot-melt adhesive bead 12 has such a low temperature and is therefore so viscous that it does not flow, ie does not fill the mold 4.

Die in dieser Ansicht rechte Seite der Platte 2 weist in Längs- und Querrichtung je einen Anschlagsteg 13, 14 auf, an den ein Einbandbogen im Verhältnis zur Form 4 ausgerichtet werden kann. Dies ist aus der Querschnittsdarstellung gemäß Figur 3 zu sehen. Ein Einbandbogen 15 ist so über die Form 4 gelegt, daß er mit einer Längskante an dem Anschlagsteg 13 und mit einer Querkante an dem Anschlagsteg 14 anliegt.The right side of the plate 2 in this view has a stop web 13, 14 in the longitudinal and transverse directions, to which a cover sheet can be aligned in relation to the form 4. This can be seen from the cross-sectional illustration according to FIG. 3. A cover sheet 15 is placed over the form 4 so that it abuts the stop bar 13 with a longitudinal edge and the stop bar 14 with a transverse edge.

Von oben herab drückt jetzt ein in den Richtungen des Doppelpfeils B bewegbarer Preßstempel 16 den über der Form 4 befindlichen Teil des Einbandbogens 15 leicht in diese Form hinein, wodurch die Schmelzkleberraupe 12 innerhalb der Form 4 gleichmäßig verteilt wird, bis sie den so gebildeten Hohlraum vollständig ausfüllt. Gleichzeitig prägen dabei die Seitenwände 6, 7 Falzen 17, 18 in den Einbandbogen 15, durch die dieser in einen Einbandrücken 19 und daran beidseitig anschließende Einbanddeckel 20, 21 aufgeteilt wird. Der Antrieb des Preßstempels 16 kann beispielsweise in an sich bekannter Weise über einen hier der Übersichtlichkeit halber weggelassenen Hydraulik- oder Pneumatikzylinder erfolgen.From below, a press ram 16 which can be moved in the directions of the double arrow B presses the part of the cover sheet 15 located above the mold 4 slightly into this mold, as a result of which the bead of hot-melt adhesive 12 is evenly distributed within the mold 4 until it completely fills the cavity thus formed fills out. At the same time, the side walls 6, 7 folds 17, 18 emboss into the cover sheet 15, through which the latter is divided into a cover spine 19 and cover covers 20, 21 adjoining it on both sides. The press ram 16 can be driven, for example, in a manner known per se via a hydraulic or pneumatic cylinder which is omitted here for the sake of clarity.

Der Preßstempel 16 selbst ist zweiteilig aufgebaut. Er hat eine starre Preßplatte 22, an deren Unterseite eine aus elastischem Material bestehende Arbeitsplatte 23 befestigt ist. Die Elastizität dieser Arbeitsplatte 23 ist so beschaffen, daß die Seitenwände 6, 7, 8, 9 so tief in sie eindringen, daß eine gute Abdichtung der Form 4 erzielt wird und der Einbandrücken 19 so tief in die Form 4 hineingedrückt wird, daß der Hohlraum vollständig mit Schmelzkleber 12 gefüllt ist.The press die 16 itself is constructed in two parts. It has a rigid press plate 22, on the underside of which a worktop 23 made of elastic material is fastened. The elasticity of this worktop 23 is such that the side walls 6, 7, 8, 9 penetrate it so deep that a good seal of the mold 4 is achieved and the binding spine 19 is pressed so deep into the mold 4 that the cavity is completely filled with hot melt adhesive 12.

Nach Anheben des - im übrigen in den Figuren 1 und 2 weggelassenen - Preßstempels 16 kann der Einbandbogen 15 von der Unterlage 2 hochgehoben werden und nimmt dabei den Schmelzkleber 12 aus der Form 4 mit. Er hat dann die in Figur 4 dargestellte fertige Formgebung. Aufgrund der hochgewölbten Ausbildung des Bodens 5 der Form 4 hat der Schmelzkleber 12 im Querschnitt eine muldenförmige Vertiefung 24, was das Zusammenhalten der beim Einbinden darauf gestellten Papierblätter begünstigt und zudem dafür sorgt, daß die außenliegenden Papierblätter in einer besonders dicken Schmelzkleberschicht eingebunden werden. Außerdem sind die eingeprägten Falzen 17, 18 zu sehen, die den Einbandrücken 19 von den Einbanddeckeln 20, 21 trennen.After lifting the press ram 16, which has otherwise been omitted in FIGS. 1 and 2, the cover sheet 15 can be lifted up from the base 2 and thereby takes the hot melt adhesive 12 out of the mold 4. It then has the finished shape shown in FIG. 4. Due to the high arching of the bottom 5 of the form 4, the hot melt adhesive 12 has a trough-shaped depression 24 in cross section, which favors the holding together of the paper sheets placed on it when it is bonded and also ensures that the outer paper sheets are bound in a particularly thick hot melt adhesive layer. In addition, the embossed folds 17, 18 can be seen, which separate the cover spine 19 from the cover covers 20, 21.

Mit Hilfe der vorbeschriebenen Vorrichtung 1 erhält man einen exakt positionierten und die gewünschte Formgebung aufweisenden Schmelzkleberauftrag 12 auf einem Einbandbogen 15, wobei billiges Schmelzklebergranulat verarbeitet werden kann. Durch Austausch des Mittelstücks 3 können die verschiedensten Formgebungen für den Schmelzkleberauftrag 12 verwirklicht werden.With the aid of the device 1 described above, an exactly positioned hot melt adhesive application 12 with the desired shape is obtained on a cover sheet 15, and cheap hot melt adhesive granulate can be processed. By exchanging the center piece 3, a wide variety of shapes for the hot melt adhesive application 12 can be realized.

Claims (14)

  1. Method of producing a binding (15) or the like having at least one cover adjoining a spine, a strip (12) of hot-melt adhesive being applied to the inside of the spine (19) while in a liquid or at least pasty state due to prior heating, characterised in that the hot-melt adhesive in the heated state is introduced into a mould (4) which is open along one longitudinal side and is for forming the strip (12) of hot-melt adhesive, the binding (15) is placed with the inside of the spine (19) over the open longitudinal side of the mould (4) and the spine (19) is pressed onto or into this mould (4).
  2. Method according to Claim 1, characterised in that the hot-melt adhesive is also held so as to shape it against the end faces (8, 9) of the mould (4).
  3. Method according to Claim 1 or 2, characterised in that the hot-melt adhesive is heated before introduction into the mould (4) to a temperature which is so far below the normal working temperature that the hot-melt adhesive is in a relatively viscous state in comparison with the fully liquid state at the normal processing temperature.
  4. Apparatus for carrying out the method according to one of Claims 1 to 3, characterised by a mould (4) which is formed by a bottom (5) and side walls (6, 7, 8, 9) and is open along one longitudinal side, by a pressing device (16) for pressing the spine (19) into the open longitudinal side of the mould (4), by a heating device for liquefying the hot-melt adhesive as well as by a feeding device (10, 11) for filling the liquid hot-melt adhesive into the mould (4).
  5. Apparatus according to Claim 4, characterised in that the mould (4) has end side walls (8, 9) on the end faces.
  6. Apparatus according to Claim 4 or 5, characterised in that the side walls (6, 7) on the longitudinal sides of the mould (4) are designed as protruding bending edges for impressing folds (17, 18) when pressing the spine (19) into the mould (4).
  7. Apparatus according to one of Claims 4 to 6, characterised in that the pressing device (16) has a pressing die (16), which is arranged opposite the open longitudinal side of the mould (4) and is provided on its working side with a flexible layer (23).
  8. Apparatus according to one of Claims 4 to 7, characterised in that the upper edges of the side walls (6, 7, 8, 9) of the mould (4) are assigned corresponding grooves in the working side (23) of the pressing die (16).
  9. Apparatus according to one of Claims 4 to 8, characterised in that the bottom (5) of the mould (4) is arched arcuately upwards in the region of the centre longitudinal axis.
  10. Apparatus according to one of Claims 4 to 9, characterised in that the bottom (5) of the mould (4) is fitted interchangeably.
  11. Apparatus according to one of Claims 4 to 10, characterised in that the bottom (5) of the mould (4) can be moved towards and away from the open longitudinal side.
  12. Apparatus according to one of Claims 4 to 11, characterised in that mould (4) and feeding device (10, 11) can be moved relative to each other for introducing the hot-melt adhesive.
  13. Binding (15) having at least one cover (20, 21) adjoining a spine (19), there being provided on the inside of the spine (19) a strip (12) of hot-melt adhesive standing proud of the latter, characterised in that the strip (12) of hot-melt adhesive is made thinner in the region of the centre longitudinal axis than along its longitudinal edges.
  14. Binding according to Claim 13, characterised in that the strip (12) of hot-melt adhesive has an arcuate depression (24) towards the centre longitudinal axis.
EP85111662A 1984-09-28 1985-09-14 Process and device for manufacturing a binding or the like, and binding Expired - Lifetime EP0176844B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111662T ATE70227T1 (en) 1984-09-28 1985-09-14 METHOD AND APPARATUS FOR MAKING A COVER OR THE LIKE, AND COVER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3435704A DE3435704C1 (en) 1984-09-28 1984-09-28 Method and device for producing a cover or the like and cover
DE3435704 1984-09-28

Publications (3)

Publication Number Publication Date
EP0176844A2 EP0176844A2 (en) 1986-04-09
EP0176844A3 EP0176844A3 (en) 1988-07-20
EP0176844B1 true EP0176844B1 (en) 1991-12-11

Family

ID=6246653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111662A Expired - Lifetime EP0176844B1 (en) 1984-09-28 1985-09-14 Process and device for manufacturing a binding or the like, and binding

Country Status (8)

Country Link
US (1) US4718969A (en)
EP (1) EP0176844B1 (en)
JP (1) JPS61154891A (en)
AT (1) ATE70227T1 (en)
AU (1) AU4794985A (en)
DE (2) DE3435704C1 (en)
DK (1) DK437285A (en)
ES (1) ES8702261A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7084215B2 (en) 2002-09-21 2006-08-01 Goldschmidt Gmbh Amphiphilic organopolysiloxanes having polyester groups and use thereof as emulsifiers or dispersing agents

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
US4606689A (en) * 1985-07-05 1986-08-19 Bind-O-Matic Ab Method and apparatus for producing book covers, folders, booklets and the like
SE452287B (en) 1986-03-14 1987-11-23 Bolin Goeran FOLDER OR SIMILAR WITH BINDING AGENTS AND PROCEDURES AND APPLIANCES FOR PREPARING THE SAME
DE3702529A1 (en) * 1986-11-25 1988-06-01 Reprografia Iberica Machine for the production of folders for thermal binding
DE3716112C1 (en) * 1987-05-14 1988-08-25 Peter Lazar Method and device for producing a cover or the like
DE3811960A1 (en) * 1988-04-11 1989-10-19 Peter Lazar Method and apparatus for producing a book casing or the like
DE4403887C2 (en) * 1994-02-08 1996-10-02 Peter Lazar Method and device for applying hot melt adhesive to a cover sheet
GB2332398B (en) * 1997-12-19 2002-02-13 Breed Automotive Technologies Buckle arrangement
DE102004055973A1 (en) * 2004-11-19 2006-06-08 Bundesdruckerei Gmbh Insert sheet, in particular for a book-type identification document, method and apparatus for producing an insert sheet
JP4694962B2 (en) * 2005-12-26 2011-06-08 株式会社リヒトラブ File and manufacturing method thereof
BE1017215A3 (en) * 2006-07-11 2008-05-06 Unibind Ltd Production method for thermal binding element, involves pressing hot=melt adhesive applied to binding element to uniform thickness
BE1018467A3 (en) * 2009-01-21 2010-12-07 Unibind Ltd BINDING ELEMENT FOR MANUFACTURING A BINDING FARDE AND METHOD USING SUCH BINDING ELEMENT FOR MANUFACTURING THE BINDING FARDE.
WO2016129863A1 (en) 2015-02-12 2016-08-18 Samsung Electronics Co., Ltd. Payment processing method and electronic device supporting the same
BE1023182B1 (en) * 2015-06-08 2016-12-12 Unibind Limited Bindingfarde

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DE2237583A1 (en) * 1971-11-01 1973-05-03 Xerox Corp BINDING LINK AND METHOD OF BINDING PAGES IN BOOK FORM
DE2528225A1 (en) * 1974-07-01 1976-01-22 Gen Binding Corp COVER FOR PAPER SHEETS
DE2611242A1 (en) * 1975-03-17 1976-09-30 Gen Binding Corp DEVICE FOR APPLYING A MOLTEN ADHESIVE LAYER, IN PARTICULAR FOR THE PRODUCTION OF A BINDING PROCESS
DE2743685A1 (en) * 1976-09-27 1978-03-30 Bindit Corp DEVICE AND LID FOR BINDING A VARIETY OF LOOSE SHEETS
DE3010642A1 (en) * 1979-03-30 1980-10-02 Semotex Ab Application of cover to book or brochure

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JPS4222521Y1 (en) * 1965-08-21 1967-12-21
GB1462644A (en) * 1973-01-26 1977-01-26 Opti Holding Ag Sliding clasp fastener stringer and process and apparatus for its manufacture
GB2072096B (en) * 1979-01-11 1983-05-25 Midland Binding Machines Ltd Thermal binding machines
SE413647B (en) * 1979-03-30 1980-06-16 Semotex Ab PROCEDURE AND DEVICE FOR PREPARING A PERM, A COPY OR SIMILAR
DE2937171A1 (en) * 1979-09-14 1981-04-02 Finn Business Machines Inc. Konttorikoneteollisuus Oy, Helsinki Computer sheet binders prodn. method - consists of front and back section with spine covered by thermoplastic layer (FI 30.11.79)
CH655060A5 (en) * 1981-10-06 1986-03-27 Unibind Ltd Protective cover with adjustable spine width and use thereof

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
DE2237583A1 (en) * 1971-11-01 1973-05-03 Xerox Corp BINDING LINK AND METHOD OF BINDING PAGES IN BOOK FORM
DE2528225A1 (en) * 1974-07-01 1976-01-22 Gen Binding Corp COVER FOR PAPER SHEETS
DE2611242A1 (en) * 1975-03-17 1976-09-30 Gen Binding Corp DEVICE FOR APPLYING A MOLTEN ADHESIVE LAYER, IN PARTICULAR FOR THE PRODUCTION OF A BINDING PROCESS
DE2743685A1 (en) * 1976-09-27 1978-03-30 Bindit Corp DEVICE AND LID FOR BINDING A VARIETY OF LOOSE SHEETS
DE3010642A1 (en) * 1979-03-30 1980-10-02 Semotex Ab Application of cover to book or brochure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7084215B2 (en) 2002-09-21 2006-08-01 Goldschmidt Gmbh Amphiphilic organopolysiloxanes having polyester groups and use thereof as emulsifiers or dispersing agents
US7339011B2 (en) 2002-09-21 2008-03-04 Goldschmidt Gmbh Amphiphilic organopolysiloxanes having polyester groups and use thereof as emulsifiers of dispersing agents

Also Published As

Publication number Publication date
US4718969A (en) 1988-01-12
JPS61154891A (en) 1986-07-14
ES8702261A1 (en) 1986-12-16
DK437285A (en) 1986-03-29
ATE70227T1 (en) 1991-12-15
DK437285D0 (en) 1985-09-27
DE3435704C1 (en) 1986-03-13
EP0176844A3 (en) 1988-07-20
DE3584869D1 (en) 1992-01-23
AU4794985A (en) 1986-04-10
ES547405A0 (en) 1986-12-16
EP0176844A2 (en) 1986-04-09

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