EP2537786A1 - Rod-stack and method for manufacturing this rod-stack from printed products - Google Patents

Abstract

The method involves forming the blocks (3-1 to n) from different format sizes of the block parts (35-1 to n). The block part of the lateral, upper or lower surface (x-1,x-2,y-1,y-2,z-1,z-2) of a forming rod is provided with a boundary surface (36'-1 to n) that is aligned with one surface of the rod. Multiple printing sheets are combined to the block. The portions of the printed sheet are cut at different length and are folded by a cyclically adjustable aligning element that is displaced transversely in the driving direction of the printed sheet. An independent claim is provided for a rod with an information carrier for the identification.

Description

The invention relates to a rod and a method for producing this rod, in which a plurality of identical printed sheets combined into a book block and a plurality of book blocks with the same orientation each lower edges of the sheet standing to a cuboid bar with two frontal and two lateral surfaces and with an upper and a lower surface brought together, pressed and fixed after pressing in their position. Such rods are produced for intermediate storage of printed sheets by means of so-called rod jib. For this purpose, stand-together printed sheets are formed forming a rod, pressed together and strapped.

In the production of glued-bound printed products such as books, paperbacks and similar products, the required printed sheets and envelopes are known to be printed and stored in any order in a first step. Subsequently, the printed sheets of the same or different types, which may for example also be folded sheets, single sheets, supplements, attachment sheet or bow with glued attachment sheet, collected in the correct order to loose book block and fed to an adhesive binder, where they tied in the back and with more Book parts, such as envelopes, book covers for hardcover products, combined attachment sheets or strips are glued. By separating the printing process from the binding process, are Both processes with the optimum speed corresponding to them feasible. The disadvantage is that the binding process can only be carried out when all printed sheets and envelopes are printed, which requires a relatively large stock of printed sheets and envelopes.

Next printing presses are known to successively print all the pages of a book and then provide complete, loose book block that can be fed directly to an adhesive binder. From the US3518940A Such a printing press is known. With this method, which is rarely used in practice, it is possible to avoid the temporary storage of printed signatures, which requires a very complex printing press. Moreover, this method is economical only for very long runs and the achievable print quality is low.

For some time, digital printing machines have been known, which also successively print all pages of a book and then deliver complete, loose book blocks that can be bound without further operations. Accordingly, with a digital press, it is possible to optionally produce complete book blocks with different contents one after the other. Another advantage of digital printing machines is that no printing plates are needed. In addition to avoiding the costs incurred for the production of the printing plates, also eliminates the necessary for the printing plate changes business interruptions. The book block forming sheet or sheets are designed as a stack and stored, for example, offset on a pallet to each other, so they are later manually separated from each other in a simple manner. Alternatively, full-surface layers of book blocks can be formed, which are separated from each other by an intermediate layer. Such stacked book blocks can be stored for any length before they are fed to a perfect binder.

The laying of loose stacks on pallets can be carried out automatically or manually with a so-called palletizer. Such a device is in the EP2098465 A1 disclosed. The loose sheet stacks of horizontal printed products are later removed manually from the pallet and inserted into the feed area of an adhesive binder. A disadvantage of this solution is known that the loose book block are pressed too little in the seams, making thick products in the fold substantially thicker than in the flat part. In addition, the lower book blocks are pressed the strongest and the top not at all. Poor or differently pressed book blocks can lead to serious problems in further processing or impede further processing.

In the EP2159070 A1 It is proposed to glue the printed sheets of a stack in an edge region mutually. This ensures that at a later time, before further processing, the stacks can be clearly separated again. Also in this method, the sheets are pressed irregularly or too little, with the disadvantages already mentioned. In addition, the glued sheets in the perfect binder can no longer align each other. Another disadvantage is the area required for the gluing surface of the sheet, which must be cut off necessarily in the final trimming in the three-knife trimmer and thus can significantly increase the consumption of paper. A further disadvantage results from the thickening of the stacks at the points where adhesive is applied to the printed sheets, which makes further processing more difficult.

It is also known to glue the printed sheets together at their front sides instead of between their flat sides. In addition to the above-mentioned disadvantages of such a gluing, this method additionally has the disadvantage that the adhesive can deposit on paper guides during further processing, which can cause machine malfunctions and cleaning effort.

Instead of storing the printing sheet stack on pallets or similar devices, methods are also known in which the printing press in a line operated with the perfect binder. Since the printing press, as already mentioned, can print continuously, a buffer gap must be provided between the printing press and the further processing, the buffer capacity of which is sufficient to store the book block printed during the conversion of the further processing individually. Additional buffer capacity is to be provided in case the further processing is at a standstill for some reason. Alternatively, the printed in such a phase book block can also be ejected and fed back later.

The EP1950159 A1 discloses a stacked array of flat printed products where the printed products in the stack are all aligned identically. One of the four sides of the printed products is thicker than the others because, for example, the printed products on that side have a fold or even a staple. So that these stacks are just as stable as those stacks which are formed of partial stacks alternately offset by 180 °, here the stacks of stacks are offset alternately to one another transversely to the thicker side. The partial stacks are offset perpendicular to the lower edges in the direction of the height of the stack. Trays designed in this way have the disadvantage that the printed products within the stack are pressed to different extents in the region of the thicker side, whereby the non-pressed seam areas tend to fan out.

The invention has for its object to provide a method in which collected book blocks are stacked so that they are evenly pressed during storage and clean again separated from each other for further processing. The storage and buffering of the book blocks should be as little space as possible. The stacking of the book blocks should be able to be used for inline and offline operation of printing press and perfect binding line.

The object is achieved according to the invention in that the book blocks are formed from at least a first book block part and a last book block part of different format, wherein the book block parts each have a boundary surface on the lateral surfaces or the upper or lower surface of the rod to be formed and a first boundary surface the book block parts are aligned flush with one another on one of the two lateral surfaces or on the upper or the lower surface of the rod, so that a second boundary surface of the first book block part opposite the first boundary surface of the first book block part adjoins one of the first boundary surface of the last book block part boundary surface of the last Book block part offset protrudes. The lateral boundary surfaces of at least thin book block parts may also be referred to as side edges. The lateral offset of book block to book block, which forms by this method within the resulting rod, creating clear separation points, which later allow to separate the loose book blocks safely from each other. Only by such a storage of the book block in the form of a rod can be ensured that all book blocks and printed sheets are pressed with the same force and that no deformations of individual book block occur until the removal of the book block at a later date, for example shortly before further processing.

It is advantageous if the book block parts with different formats thereby obtain their different dimensions that sections are cut from a printed material web and folded differently or that sections of different lengths are cut and folded from the printed material web. In this case, the book block parts with different formats can be produced in that sections of a printed material web are offset transversely to a running direction L of the printed material web before folding by means of a cyclically adjustable alignment element. Thus, the leg length of the folded portions 40 can be changed as required. It also proves advantageous if the book blocks are brought together in such a way that the bar is formed such that folding edges of the printed sheets are used as lower edges. When folded sheet, it is particularly advantageous if the last in the course of the folding process resulting folding edge, which is referred to as "last folding edge" is used as the lower edge, since the mechanical strength is highest.

In a development of the invention, the book blocks of the rod can each be formed from printed sheets with different print contents. The printed sheets originate, for example, from a digital printing machine that can, optionally, successively produce complete book blocks with different contents.

With the described method, bars can be made from book blocks in which the book blocks are formed from at least a first and a last book block part of different formats, wherein the book block parts each have a boundary surface on the lateral surfaces or the upper or lower surface of the bar to be formed and aligning a first boundary surface of the book block portions flush with each other at one of the two lateral surfaces or at the upper or lower surface of the rod. According to the invention, in such a rod one of the first boundary surface of the first book block part opposite the second boundary surface of the first book block part to one of the first boundary surface of the last book block part opposite boundary surface of the last book block part shows out offset.

Preferably, folding edges, in particular a last folded edge of the printed sheets in the bar form the lower edges. In the event that the book blocks of the rod are each formed of printed sheets that have been printed for example by a digital press with different print contents, the book blocks of the rod can each have a different print content.

In another development of the rod according to the invention, in addition to the printed sheets combined into book blocks, other book parts, such as inserts, attachment sheets or sheets with attached attachment sheets, can also be arranged.

It is advantageous if the printed sheets and / or the book blocks and / or the rods have at least one information carrier for their identification. As a result, in the further processing either each individual bar or its components can be assigned, for example, an individual processing.

Fig. 1

eine schematische Darstellung eines erfindungsgemässen Verfahrens zur Herstellung einer Stange (Druckbogen unterschiedlich lang),

Fig. 1a

einen einzelnen Druckbogen,

Fig. 2

eine schematische Darstellung einer Variante des erfindungsgemässen Verfahrens zur Herstellung einer Stange (Druckbogen unterschiedlich gefalzt),

Fig. 3

eine aus Buchblocks gebildete Stange (Druckbogen unterschiedlich lang),

Fig. 4

Variante einer aus Buchblocks gebildete Stange (Druckbogen unterschiedlich gefalzt),

Fig. 5

vergrösserte Darstellung einer aus Teilbuchblocks gebildeten Stange.

The invention will be explained below with reference to the drawing and the cited prior art with reference to embodiments. In the drawing show:

Fig. 1

a schematic representation of a method according to the invention for producing a rod (printed sheets of different lengths),

Fig. 1a

a single sheet,

Fig. 2

a schematic representation of a variant of the inventive method for producing a rod (sheet different folded),

Fig. 3

a rod formed of book blocks (printed sheets of different lengths),

Fig. 4

Variant of a formed from book block rod (sheet different folded),

Fig. 5

enlarged view of a bar formed from parts book blocks.

The Fig. 1 shows an embodiment of a bar former 6 with upstream printing machine 4. The printing machine 4, for example, a digital printing machine, printed in the order of the book composition unwound from a roll of paper 39 material web 42, which is cut into sections 40 after printing. These sections 40, also called signature, can be designed either as folded in a folding device 37 or as unfolded printed sheet 10 in a scale flow 11. The printed sheets 10 have a lower edge 7, which may be a folded edge 5, as in Fig. 1a shown.

The folding device 37 is in Fig. 1 illustrated as sword folder, in which the sections 40 are conveyed by means of a sword between two folding rollers and folded by them. The different formats of the sections 40 can be achieved by cutting sections 40 of different lengths from the printed material web or by folding the sections 40 differently.

Fig. 1 shows how in the direction L different lengths sections 40 are cut and aligned before folding on a fixed stop 8. The longer sections 40 are then on the opposite side of the stop 8 from the scale flow 11 and from the rod 13 before. Such a rod is in Fig. 3 shown. By way of example, 13 information carriers 19 ₁ , 19 ₂ , 19 ₃ are shown here within the rod 13, which serve to identify the printed sheets 10 and / or the book blocks 3 _{1... N} and / or the rods 13, depending on where they are mounted.

Alternatively, the sections 40 according to Fig. 2 offset before folding by means of a cyclically adjustable alignment element 9 transversely to the direction L, bringing the leg length of folded to sheet 10 sections 40 can change. A rod 13 of such folded portions 40 is in the Fig. 4 shown.

The scale flow 11 is transferred in the conveying direction F with a shingled flow conveyor 38 to the bar former 6 and here stacked to a rod 13, provided with end boards 14, pressed with an adjustable force and strapped with a tension element 15. In the strapped rods 13, the pressing force is maintained, whereby all printed sheets contained in the bars 13 10 remain pressed with the same force. By squeezing the spring-back of the book block 3 ₁ ... _n in the region of the folds when loosening the tension element 15 can be significantly reduced, which during a further processing of the book block 3 ₁ ... _n higher product quality can be achieved because no deformation of the book blocks 3 ₁ ... _n more occur. As rod-forming 6, for example, the generic device according to EP623542 A1 be used. A slider 16 then pushes the strapped rod 13 in the sliding direction S on, for example, a buffer device.

For pressing and stabilizing the rods 13 other devices are also conceivable instead of end boards 14 and tension members 15. For example, the rods 13 could be held together and pressed by means of reusable clips, which clips could be automatically or manually returned to the rod former 6 after opening.

The Fig. 5 shows the basic structure of a rod 13 of identical book block 3 ₁ ... _n , ie identical from the standpoint of the format sequence of the embraced sheet 10, in which several of these sheets 10 combined to a book block 3 _{1 ... n} and several book blocks 3 _{1. ..n} with the same orientation in each case on lower edges 7 of the sheet 10 standing to a parallelepiped rod 13 with two frontal and two lateral surfaces x ₁ , x ₂ ; y ₁ , y ₂ and with an upper and a lower surface z ₁ , z ₂ merged and pressed. The book blocks 3 _{1 ... n} are off formed at least a first book block part 35 ₁ and a last book block part 35 _n different format. The book block parts 35 _{1... N} on the lateral surfaces y ₁ , y ₂ or the upper or the lower surface z ₁ , z _{2 of} the rod 13 to be formed each have a boundary surface 36 _{1 ... n} and a first boundary surface 36 _{1 ... n of} the book block parts 35 _{1 ... n} on one of the two lateral surfaces y ₁ , y ₂ or on the upper or the lower surface z ₁ , z _{2 of} the rod 13 aligned flush with each other. One of the first boundary surface 36 _{1 ... n of} the first book block part 35 ₁ opposite second boundary surface 36 ' _{1 ... n of} the first book block part 35 ₁ stands to one of the first boundary surface 36 _{1 ... n of} the last book block part 35 _n opposite boundary surface 36 ' _{1 ... n of} the last book block part 35 _n offset.

Claims (12)

Method for producing a rod (13) from identical book blocks (3 _{1 ... n} ), in which several printed sheets (10) are combined to form a book block (3 _{1 ... n} ) and several book blocks (3 _{1 ... n} ) with the same orientation in each case on lower edges (7) of the sheet (10) standing to a cuboid bar (13) with two frontal surfaces (x ₁ , x ₂ ) and two lateral surfaces (y ₁ , y ₂ ) and with an upper and a Bottom surface z ₁ , z ₂ ) merged, pressed and fixed after pressing in position, characterized in that the book block (3 _{1 ... n} ) from at least a first book block part (35 ₁ ) and a last book block part (35 _n ) of different format, wherein the book block parts (35 _{1 ... n} ) on the lateral surfaces (y ₁ , y ₂ ) or the upper or the lower surface (z ₁ , z ₂ ) of the rod to be formed (13) each have a boundary surface (36 _{1 ... n} ) and the first boundary surface (36 _{1 ... n} ) of Bu chblockteile (35 _{1 ... n} ) on one of the two lateral surfaces (y ₁ , y ₂ ) or on the upper or the lower surface (z ₁ , z ₂ ) of the rod (13) are aligned flush with each other, so that a the first limiting surface (36 _{1 ... n)} of the first book block member (35 ₁₎ opposite second Begrenzungsfiäche (36 _{'1 ... n)} of the first book block member (35 ₁₎ to the first limiting surface (36 _{1 ... n)} the last book block part (35 _n ) opposite boundary surface (36 ' ₁ ... _n ) of the last book block part (35 _n ) protrudes offset. A method according to claim 1, characterized in that the book block parts (35 _{1 ... n)} thus obtained their different dimensions, that portions (40) of a printed web of material (42) cut and folded differently, or that different length portions (40) be cut and folded from the printed material web (42). A method according to claim 1, characterized in that the book block parts (35 _{1 ... n} ) with different formats are produced in that sections (40) of a printed material web (42) before folding by means of a cyclically adjustable alignment element (9) transversely to a running direction L of the printed material web (42) are offset. Method according to one of claims 1 to 3, characterized in that the rod (13) is formed such that folding edges (5) of the printed sheets (10) are used as lower edges (7). Method according to one of claims 1 to 4, characterized in that the rod (13) is formed such that in each case a last folded edge (5) of the printed sheet (10) is used as the lower edge (7). Method according to one of claims 1 to 5, characterized in that the book blocks (3) of the rod (13) are each formed of printed sheets (10) with different Druckinhalten. Bar (13) from identical book block (3 _{1 ... n} ), in which several sheets (10) to a book block (3 _{1 ... n} ) summarized and several book blocks (3 _{1 ... n} ) with the same orientation respectively on lower edges (7) of the sheet (10) standing to a parallelepiped rod (13) with two end faces (x ₁ , x ₂ ) and two lateral surfaces (y ₁ , y ₂ ) and with an upper and a lower surface (zu , z ₂ ), pressed and fixed in their position after pressing, characterized in that the book blocks (3 _{1 ... n} ) from at least a first book block part (35 ₁ ) and a last book block part (35 _n ) of different format are formed, wherein the book block parts (35 _{1 ... n} ) on the lateral surfaces (y ₁ , y ₂ ) or the upper or the lower surface (z ₁ , z ₂ ) of the rod to be formed (13) each have a boundary surface ( 36 _{1 ... n} ) and a first boundary surface (36 _{1 ... n} ) of the book block parts (35 _{1 ... n} ) on a de r two side surfaces (y ₁ , y ₂ ) or on the upper or the lower surface (z ₁ , z ₂ ) of the rod (13) are aligned flush with each other, so that one of the first boundary surface (36 _{1 ... n} ) of the first book block part (35 ₁ ) opposite the second boundary surface (36 ' _{1 ... n} ) of the first book block part (35 ₁ ) to one of the first boundary surface (36 _{1 ... n} ) of the last book block part (35 _n ) opposite boundary surface (36 ' _{1 ... n} ) of the last book block part (35 _n ) protrudes offset. Bar (13) according to claim 7, characterized in that in the bar (13) folding edges (5) of the printing sheet (10) form the lower edges (7). Rod (13) according to claim 8, characterized in that in the rod (13) in each case a last folded edge (5) of the printed sheet (10) forms the lower edge (7). Rod (13) according to any one of claims 6 to 9, characterized in that the book blocks (3 _{1 ... n} ) of the rod (13) are each formed of printed sheets (10) with different Druckinhalten. Rod (13) according to any one of claims 6 to 10, characterized in that in addition to the to the book block (3 _{1 ... n)} combined printed sheets (10) other book components such as inserts, end-paper sheet or sheets with glued end-paper sheet in the rod (13) are arranged. Rod (13) according to one of claims 6 to 11, characterized in that the printed sheets (10) and / or the book blocks (3 _{1 ... n} ) and / or the rods (13) at least one information carrier (19 ₁ , 19 ₂ , 19 ₃ ) for their identification.

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