EP2159070A1 - Device and method for manufacturing piles of book blocks - Google Patents

Abstract

The method involves placing sheets (12') on one another at a staple. The individual sheets, which belong to a block, are connected together by an adhesive. The adhesive is applied on the sheet before the sheets adjacent to a side edge of the sheet. An independent claim is included for a device for manufacturing stacking formed by blocks.

Description

The present invention relates to a method and an apparatus for producing book blocks forming stacks according to the preamble of claim 1 and the preamble of claim 10, respectively.

In the US-A-2007/0179037 a processing line is described in which a unwound from a roll material web is printed in a digital printing station. From the material web printed sheets are then separated by cross-cutting, which are folded once or twice. The folded sheets are then stacked in a stacking station, each stacking a book block. The stacks are conveyed from the stacking station either to a binding machine or to an intermediate store, from where the stacks are later transported to a binding machine.

During the transport of the stacks from the stacking station to the binding machine or to the intermediate storage, it can easily happen that individual sheets move within the stacks, thus losing the exact orientation of the sheets in the stack after stacking. Therefore, the binding machines are usually equipped with a vibrator, in which the sheets are aligned again within a stack as accurately as possible in the delivered stacks, so that a very good binding quality can be achieved.

The present invention is based on the object, a method and an apparatus of the aforementioned To provide a way that allows you to get the exact alignment of the sheets within the stack during further transport of the stack achieved when stacking the printed sheets.

This object is achieved according to the invention with a method having the features of claim 1 or with a device having the features of claim 10.

Characterized in that the individual sheets within a book block forming stack by means of an adhesive which is applied to the sheet before or when juxtaposing the sheet adjacent to a side edge of the sheet, preferably that side edge which comes to rest in the back of the book block , are interconnected, it is achieved that the sheets maintain their position within the stack even after leaving the stacking station. This means that the stack quality of the stack fed to the binding machine does not differ from the stack quality of the stack formed in the stacking station.

Since the application of adhesive to the sheet is preferably adjacent to the side edge of the sheet which comes to rest in the spine of the book block, this application of adhesive does not adversely affect the quality of the finished book.

Preferred further developments of the inventive method and the inventive device form the subject of the dependent claims.

Fig. 1

in Draufsicht eine erste Ausführungsform einer Vorrichtung zum Bilden von Buchblöcke bildenden Stapeln,

Fig. 2

in Draufsicht die Herstellung von Stapeln aus einmal gefalzten Bogen mittels der Vorrichtung gemäss Fig. 1,

Fig. 3

in Draufsicht die Herstellung von Stapeln aus zweimal gefalzten Bogen mittels der Vorrichtung gemäss Fig. 1,

Fig. 4

in Draufsicht eine zweite Ausführungsform einer Vorrichtung zum Bilden von Buchblöcke bildenden Stapeln,

Fig. 5

in Draufsicht die Herstellung von Stapeln aus einmal gefalzten Bogen mittels der Vorrichtung gemäss Fig. 4,

Fig. 6

in Draufsicht die Herstellung von Stapeln aus zweimal gefalzten Bogen mittels der Vorrichtung gemäss Fig. 4,

Fig. 7

in einer Seitenansicht Stapel aus einmal gefalzten, mittels eines Klebstoffes miteinander verbundenen Bogen,

Fig. 8

die Stapel gemäss Fig. 7 in Draufsicht,

Fig. 9

in einer Seitenansicht Stapel aus zweimal gefalzten, mittels eines Klebstoffes miteinander verbundenen Bogen,

Fig. 10

die Stapel gemäss Fig. 9 in Draufsicht,

Fig. 11

in einer Seitenansicht einen fertig bearbeiteten Buchblock mit Einbanddecke, und

Fig. 12

eine Ansicht auf den Rücken des Buchblocks gemäss Fig. 11.

In the following the invention will be explained in more detail with reference to the drawings. It shows purely schematically:

Fig. 1

in plan view a first embodiment of an apparatus for forming book blocks forming stacks,

Fig. 2

In plan view, the production of stacks of once folded sheet by means of the device according to Fig. 1 .

Fig. 3

In plan view, the production of stacks of twice folded sheet by means of the device according to Fig. 1 .

Fig. 4

in plan view, a second embodiment of an apparatus for forming book blocks forming stacks,

Fig. 5

In plan view, the production of stacks of once folded sheet by means of the device according to Fig. 4 .

Fig. 6

In plan view, the production of stacks of twice folded sheet by means of the device according to Fig. 4 .

Fig. 7

in a side view stack of once folded, interconnected by means of an adhesive sheet,

Fig. 8

the stacks according to Fig. 7 in plan view,

Fig. 9

in a side view stack of twice folded, by means of an adhesive interconnected sheet,

Fig. 10

the stacks according to Fig. 9 in plan view,

Fig. 11

in a side view a finished book block with cover, and

Fig. 12

a view on the back of the book block according Fig. 11 ,

The in the Fig. 1 schematically illustrated first embodiment of an apparatus 1 for producing book blocks forming stacks has seen in the processing direction A an unwinding station 2, in which the material web to be processed 3 (FIG. FIGS. 2 and 3 ) is unwound from a roll, and a digital printing station 4, in which the material web 3 is printed on both sides. In the FIGS. 2 and 3 the printed area of the material web 3 is denoted by 3a. The digital printing station 4 is a perforation station 5 downstream, which has a perforating unit, by means of which the printed material web 3 can be provided with one or two perforation or weakening lines, as the basis of FIGS. 2 and 3 will be explained in more detail. For example, the perforation unit marketed by the company Hunkeler AG under the name "Perforiermodul LP4" can be used as the perforation station 5. However, this perforating 5 can also be omitted.

As seen in the processing direction A, the perforation station 5 is followed by a cross-cutting station 6 in which individual printed sheets are severed from the material web 3 by cross-cutting. On the cross-cutting station 6 is followed by a Längsfalzstation 7, in which the bow either be folded once or twice as the basis of the FIGS. 2 and 3 will be described in more detail. The changeover of the longitudinal folding station 7 from the single fold to the two fold and vice versa preferably takes place dynamically during operation without the longitudinal folding station 7 having to be stopped. As Längsfalzstation 7 is particularly suitable for the company Hunkeler AG under the name "Flyfolder FB6" sold longitudinal folding module.

As seen in the processing direction A behind the Längsfalzstation 7 a stacking station 8 is arranged, in which the folded sheets are stacked on top of each other. This stacking station 8 has an adhesive application device, by means of which the sheets are provided with an adhesive application before the sheets are placed on one another in a manner to be described. As a stacking station 8 is suitable in the EP-A-1 593 621 described stacking device, supplemented by an adhesive applicator. With a delivery station 9 is designated, which takes over the stack formed in the stacking station 8 and leads away for further processing.

Based on Fig. 2 Now, the production of stacks of once folded sheet by means of in the Fig. 1 shown device 1 described.

The forward in the direction of arrow B, the digital printing station 4 leaving, printed on both sides web 3 is provided in the perforating 5 by means of a perforation unit 10 only shown schematically, belonging to the perforating with a perforation or weakening line 11, the runs parallel to the feed direction B and in the longitudinal direction of the material web 3.

In the subsequent cross-cutting station 6, the material web 3 is cut transversely to the feed direction B and separated from the web 3 individual sheets 12. These sheets 12 are folded in the Längsfalzstation 7 once along the perforation 11. The once folded sheet is denoted by 12 'and the folded edge with 13. The production of these once folded sheet 12 'takes place substantially in the same manner as with reference to Fig. 1 and 2a of the US-A-2007/0179037 described.

In the stacking station 8, the incoming folded sheets 12 ', adjacent to their folded edge 13, are provided with an adhesive application 14, which extends along the folded edge 13 and in the embodiment shown is an adhesive trace 14a interrupted several times. The application of the adhesive takes place before or when the sheets 12 'are placed in a stack.

The provided with the adhesive coating 14 sheets 12 'are then in the stacking station 8 to a stack 15, in the Fig. 2 shown in plan view, superimposed. The finished stack 15, in which the superposed sheets 12 ', as described, are connected to each other, are taken from the delivery station 9 and guided either in an intermediate storage or to a binding station, as in the already mentioned US-A-2007/0179037 is described.

In the FIGS. 7 and 8 are shown in a side view and top view two to a large stack stacked stack 15, 15 ', each of which forms a book block and consists of once folded sheet 12'. The sheets 12 'within a stack 15, 15' are connected to each other by means of adhesive application 14. Thanks to this connection, the sheets 12 'retain their position in the stack 15, 15' when the stack 15, 15 'is being transported. As a result, the stack quality achieved in the stacking station 8 is maintained during further processing.

As already mentioned, the adhesive application 14 is adjacent to the folded edge 13. The folded edges 13 are in the back of the book blocks, which are each formed by a stack 15, 15 ', and thus in the back of the finished book to lie. Thus, the adhesive application 14 does not adversely affect the quality of the finished book. As a rule, the adhesive jobs 14 are even removed during the processing of the book block back.

The Fig. 7 indicates that the top sheet 12 'in the stack 15, 15' has no glue application. From the Fig. 8 It can be seen that the glue application 14 is applied as a multiple interrupted adhesive trace 14a, which consists of a plurality of spaced-apart adhesive lines 14a '.

Based on Fig. 3 will now be described as by means of the device according to Fig. 1 Stack made from twice folded sheets. It is also on the preceding description of Fig. 2 Referenced.

The material web 3 printed on both sides in the digital printing station 4 is provided in the perforating station 5 with two perforation or weakening lines 11, 11 'which are parallel to one another and at a distance from one another in the longitudinal direction of the material web 3, ie parallel to the feed direction B of the material web 3. run. To generate these perforation lines 11, 11 ', the perforating unit of the perforating station 5 has two perforating tools 10', 10 ". The switching from an active perforating tool 10 to two active perforating tools 10 ', 10" takes place dynamically during operation, ie without a shutdown the perforating station 5.

Same as based on the Fig. 2 described, in the transverse cutting station 6 of the web 3 individual sheets 16 are separated, which are provided with two perforation lines 11, 11 '. In the longitudinal folding station 7, the folds are then folded twice around the one perforation line 11 and the other perforation line 11 '(spiral fold). The twice folded sheets are denoted by 16 'and the folded edges with 17, 17'. The described production of twice folded sheet 16 'corresponds to the basis of Fig. 1 and 2c of the US-A-2007/0179037 described production method.

The folded sheets 16 'are the same as based on the Fig. 2 provided before or when stacked in the stacking station 8 with an adhesive coating 14 which adjacent to a folded edge 17 'and extends along the same. The adhesive application 14 is here also a multiple times interrupted adhesive trace 14a.

The sheets 16 'provided with an adhesive application 14 are then stacked on top of each other, which are led away via the delivery station 9.

In the FIGS. 9 and 10 are shown in a side view and in the plan view of two stacked to a large stack stack 18, 18 ', each of which forms a book block and consists of twice folded sheet 16'. Same as the ones in the FIGS. 7 and 8 shown stacks 15, 15 'are the sheet 16' within a stack 18, 18 'by means of an adhesive application 14 connected to each other. This adhesive application 14 is, as already mentioned, adjacent to the folded edge 17 '. The folded edges 17 'come to lie in the back of the book blocks, which are each formed by one of the stacks 18, 18'. This results in the same, based on the FIGS. 7 and 8 described advantages as in the stacks 15, 15 '.

Below we now use the Fig. 4-6 A second embodiment of the subject invention described. This second embodiment differs from the first embodiment according to the Fig. 1-3 essentially in that in the digital printing station single sheet and not a continuously moving material web 3 is printed.

The in the Fig. 4 A device 20, shown in plan view, for producing stacks forming book blocks, starting from printed single sheets, has a digital printing station 21 for printing single sheets. As seen in the processing direction A, the digital printing station 21 is followed by a longitudinal folding station 22. This longitudinal folding station 22 is a convertible pocket folder, in which the printed sheets are folded once or twice. The longitudinal folding station 22 is followed by an alignment station 23 for the folded sheet. At the alignment station 23, a stacking station 24 adjoins with an adhesive applicator, the stacking station 8 of the device 1 according to the Fig. 1 equivalent. This stacking station 24 is followed by a delivery station 25, which corresponds to the delivery station 9 of the device 1 according to FIG.

Based on Fig. 5 Now, the production of stacks of once folded sheet by means of the device 20 according to Fig. 4 explained. That in the Fig. 5 The manufacturing method shown corresponds largely to the basis of Fig. 2 described production method. Therefore, reference is also made to this Fig. 2 ,

As already mentioned, in the digital printing station 21 individual sheets 12 are printed on both sides. The printed sheets 12 are in an in Fig. 4 not shown, arranged between the digital printing station 21 and the Taschenfalzwerk 22 perforating, the perforating 5 of the device 1 according to Fig. 1 corresponds, provided with a perforation or weakening line 11 which is parallel to the processing direction A. In the pocket folder 22, the sheets 12 are folded once along the perforation 11. The once folded bow is like in Fig. 2 with 12 'and the folded edge denoted by 13.

The folded sheets 12 'are then the same as based on the Fig. 2 described, adjacent to the folded edge 13, with an adhesive application 14 in the form of a multiple provided interrupted adhesive trace 13a. Then the sheets are 12 'stacked 15 on each other. The finished stack 15, 15 'correspond to those in the FIGS. 7 and 8 shown stacks 15, 15 '. Therefore, reference is made to the preceding description of this FIGS. 7 and 8 directed.

In the Fig. 6 is shown as with the device 20 according to Fig. 4 Stacks of printed, twice-folded sheets are produced. In this case, this production method largely corresponds to the basis Fig. 3 described production method. Because of this, will also be on this Fig. 3 Referenced.

The printed on both sides in the digital printing station 21 sheet 16 are in the in connection with the Fig. 5 already mentioned, in Fig. 4 not shown Perforierstation with two perforation or weakening lines 11, 11 'provided, which are parallel to each other and at a distance from each other. In the convertible pocket folder 22, the sheets 16 are folded around the one perforation line 11 and then around the other perforation line 11 '(spiral fold). The changeover of the pocket folder 22 from the single fold to the two fold preferably takes place dynamically during operation, ie without switching off the pocket folder. The twice folded bow is the same as in the Fig. 3 with 16 'and its folded edges denoted by 17 and 17'.

The folded sheets 16 'are the same as based on the Fig. 3 described with an adhesive application 14 which extends adjacent to the fold edge 17 'and is a multiple interrupted adhesive trace 14a. The sheets 16 'are then stacked 18 stacked. The finished stack 18, 18 'correspond to those in the FIGS. 9 and 10 shown stacks 18, 18 '. For this reason, reference is made to the preceding description of this FIGS. 9 and 10 directed.

In the FIGS. 11 and 12 is shown in a side view and in a rear view a finished book block 26 with cover 27. The cover 27 is shown in dashed lines and the back is in the representation of Fig. 12 omitted to make the back 26a of the book block 26 visible.

The book block 26 shown is characterized by in the Fig. 9 shown stack 18 formed and consists of superimposed and interconnected by means of adhesive application 14 sheet 16 '. The book block 26 has been processed on its side surfaces. The folding edges 17 and possibly also the folded edges 17 'have been removed. The book block 26 is suspended in a cover cover 27 and connected by means of adhesive compounds 28 and 29 with the back 27a and the covers 27b, 27c.

In the Fig. 12 is a particularly advantageous distribution of adhesive stripes 14a '(see also the FIGS. 8 and 10 ). The adhesive lines 14a on a sheet are in fact offset laterally relative to one another in the direction transverse to the book block back 26 and thus in the direction of the side edges of the sheets 16 'relative to the adhesive lines 14a' of the underlying sheet. This distribution of the adhesive lines 14a 'in the stack 18, 18' or in the book block 26 ensures that not all of the adhesive lines 14a 'lie directly above one another. Thus, the effects of adhesive stripes 14a 'in the Height of the stack 18 are kept small. The same is true of course in the Fig. 7 shown stack 15, 15 '.

In the embodiments described above, the adhesive application 14 consists of an adhesive trace 14b, which is formed by individual, spaced adhesive stripes 14a '. But it is also possible to apply the adhesive as a continuous, continuous track. The adhesive can also be applied punctiform.

As adhesive is particularly suitable a dispersion adhesive. Such an adhesive combines the sheets sufficiently quickly and without artificial drying.

The application of the adhesive takes place by means of suitable adhesive application devices known per se. To apply the adhesive, the sheets are moved along adhesive application elements, for example nozzles. The release of adhesive from the adhesive application elements is due to control commands as dots, single strokes or a solid stroke, as has already been described. The control commands for the adhesive application device can be generated by the digital printing station 4, 21. In addition, a bar code printed on the sheets can also be used to control the adhesive applicator.

The adhesive application device can be integrated into the stacking station 8, 24 or can be connected upstream of the stacking device.

In the stacking station 8, 24 individual stacks 15, 18 are prepared and then the delivery station 9, 25, respectively. But it is also possible in the stacking station 8, 24 a plurality of stacked stack 15, 15 'and 18, 18' (see FIGS. 7 and 9 ) and by the stacked 15, 15 '; 18, 18 'formed large stack of the delivery station 9, 25 supply. Individual stacks are usually transported directly to a binding machine, while large stacks are transported to a temporary storage facility.

The basis of the FIGS. 2 and 3 or 5 and 6 described manufacturing methods can also with other devices than those in the Fig. 1 and 4 shown devices 1, 20 are performed. Thus, in the device 1 according to Fig. 1 as a longitudinal folding device 7 instead of a "Flyfolder FB6" from Hunkeler AG a Plugfalzeinrichtung be used as mentioned.

The production process according to the invention has been described above starting from folded. Bow 12 ', 16' explained. But it is also possible to stack unfolded sheets in the manner described and to provide before juxtaposing with a glue application. For books with a certain number of pages, however, this could lead to difficulties because the adhesive jobs on each single sheet take up too much space over the height of the stack, which has an adverse effect on the stack quality. This disadvantage is especially significant for thin single sheets.

At the in Fig. 4 shown device and the corresponding, in the FIGS. 5 and 6 shown method can be dispensed with the perforation or the perforation when the digital printing station 21 already perforated sheets are supplied.

At the in Fig. 1 shown device and the corresponding, in the FIGS. 2 and 3 As shown, it would also be conceivable to supply the digital printing station 4 with an already perforated material web 3 in the longitudinal direction. For this purpose, the perforating station 5 could be arranged upstream of the digital printing station 4, or it could be dispensed with, if the wound onto the roll of the unwinding station 2 material web 3 is already perforated.

In the embodiments shown, the adhesive is applied adjacent to that side edge that comes to lie in the back of the book block. However, it is also possible to apply the adhesive adjacent to another side edge. The adhesive application is then later cut away, for example by means of a three-knife trimmer.

In the described method, it is also possible, as is generally customary, during further processing in a binding station, in particular adhesive bonding station, to mill the finished stacks 15, 18 on that side which comes to lie in the back of the book block 26. In this case, the adhesive application 14 is removed, which is not detrimental, since the stacks are kept stable in the binding station. The milled back of the book block can then be bonded to the back of the cover by means of adhesive bonds in a known manner.

Claims (12)

A method for producing book blocks forming stacks, wherein in a digital printing station (4, 21) printed sheets (12 ', 16') to each book block (26) forming stack (15, 18) are superimposed, characterized in that the individual, to a book block (26) belonging sheet (12 ', 16') by means of an adhesive which before or when laying the sheets (12 ', 16') adjacent to a side edge (13, 17 ') of the sheet (12 ', 16') is applied to the sheets (12 ', 16') are joined together. A method according to claim 1, characterized in that the adhesive is applied adjacent to that side edge (13, 17 ') which comes to lie in the spine (26a) of the book block (26). Method according to claim 1 or 2, characterized in that the sheets (12 ', 16') to be provided with an adhesive application (14) are folded once or several times around mutually parallel folded edges (17, 17 '). Method according to one of claims 1 to 3, characterized in that the adhesive along the side edge (13, 17 ') on the sheet (12', 16 ') is applied. A method according to claim 4, characterized in that the adhesive as a continuous track is applied, preferably in a continuous line. A method according to claim 4, characterized in that the adhesive is applied in spaced-apart areas (14a '). A method according to claim 6, characterized in that the adhesive is applied punctiform or as a once or more interrupted track (14a). Method according to claim 6 or 7, characterized in that the adhesive is applied to the individual sheets (12 ', 16') of a book block (26) such that the adhesive jobs (14a ') are applied to a sheet (12', 16 '). relative to the adhesive applications (14a ') on the underlying sheet (12', 16 ') in the direction of the side edge (13, 17') are offset from each other. Method according to one of claims 1 to 8, characterized in that a dispersion adhesive is used as the adhesive. Device for producing book blocks forming stacks, which are formed from successive sheets (12 ', 16') printed in a digital printing station (4, 21), with a feed device for feeding sheets printed in a digital printing station (4, 21) ( 12 ', 16') and one of the feeder downstream stacking station (8, 24) in which the supplied printed sheets (12 ', 16') to each book block (26) forming stack (15, 18) are placed on each other, characterized by an adhesive application device which, prior to or when the sheets (12 ', 16') are placed on the sheets (12 ', 16') adjacent preferably to that side edge (13, 17 ') of the sheets (12', 16 '), which comes to lie in the back (26 a) of the book block (26), applying an adhesive. Apparatus according to claim 10, characterized in that the adhesive application device in the stacking station (8, 24) is integrated. Apparatus according to claim 10, characterized in that the adhesive application device of the stacking station (8, 24) is connected upstream.

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