EP2390213A1 - Method of producing a printed product - Google Patents

Abstract

The method involves forming printed products by a printed sheet (10) and/or an additional sheet (20), where the sheets are formed from different product flows (11, 21). A rotary transfer device (3) is connected between the different product flows and a stacking device (30). An interspace in the transfer device is synchronized by a controller (43), where the interspace is predetermined to accommodate the additional sheet. The sheets are transported along the product flows to the transfer device. The sheets are individually arranged at a distance from each other. An independent claim is also included for a device for producing printed products.

Description

Technical area

The present invention relates to a method for producing a printed product according to the preamble of claim 1. The invention also relates to transfer devices for carrying out such a method.

State of the art

Out EP 1 559 573 A1 For example, a method for producing printed matter such as books, brochures, magazines or the like has become known. In this method, printed sheets are each folded in a folding device in a printing press, conveyed to a stacking device and stacked in this to a book block. At least one additional sheet is added to a single sheet and the product of sheet and the added sheet added is stacked and stacked as a unit. Thus, the additional sheet is attached to a single sheet, the product of the single sheet and the supplement sheet is then stacked like the usual other sheets to the book block. Supplementary sheets of the type mentioned can consist for example of illustrations, color images or sheets printed on special paper. They may also be functional sheets which are effectively implemented in a post-processing process, such as hardcover book attachment sheets. This book block with the inserted additional sheet can then be edited as usual, for example, bound by adhesive, cut, etc. It can also be inserted easily additional sheets. From this document also shows that the additional sheet with an investor withdrawn from a pile and then the single sheet can be added. It is also possible that the additional sheet is guided to a second conveyor and combined with this with a single signature, which is conveyed sequentially with a conveyor. The second conveying device is in this case preferably charged with a feeder. If several different supplementary sheets are to be provided, it is provided here to use a plurality of feeders, each of which dispenses an additional sheet to this second conveying device. Thus, it is possible here to form a book block with several different supplementary sheets, which additional sheets can be integrated at different locations of the book block. However, it is here that the supplemental sheet is attached to a single sheet.

If, on the other hand, book blocks are to be formed in which the additional sheets must be irregularly and not sequentially monotonously, or if additional sheets are to follow one after the other, or if the supplementary sheets are at least partially formed as printed sheets, then the devices known from the prior art meet with regard to position accuracy and Clock power to their internal operating limits. Although occasional improvements are possible here, they are always associated with a relatively large effort.

Presentation of the invention

The invention aims to remedy this situation. The invention, as characterized in the claims, the task is based on a method and a device of the type mentioned a printed sheet product flow split so controlled that it allows intervening clock gaps with Einsteckbogen resp. Additional sheet to provide. The object of the invention is also to enable a consistent stacking of said sheet to a book block in the wake.

According to the invention, this object is achieved by proposing a method for producing a printed product, which comprises at least one Printed sheet and at least one additional sheet is composed. These sheets and supplementary sheets are printed sequentially.
The printed sheets and / or the additional sheets are continuously assembled individually according to specific sequences within a transfer device and then selectively stacked.

The transfer device has spaced-apart spaces or receiving points, which are in tact-related operative connection to the transport speed of the individually supplied printed sheet and additional sheet, and thus ensure an endless promotion. The individual brought-up printed sheet and additional sheet are cyclically targeted introduced into the individual spaces or receiving points within the transfer device.

The actual transport takes place along a certain arc angle or along a certain distance, depending on the embodiment of the transfer device. It is readily possible in such a conveyor that the individual additional sheets are not placed monotonously in the clock gaps of the transfer device, but they can be readily attached or attached to an already placed sheet, which maximizes the flexibility of the inventive method.

The essential advantage of the invention lies in the fact that the feeding and insertion of illustrations or the like into a printed product, for example in a book, is flexible and easy to carry out. In this case, the supplying stream of printed sheets, which essentially form the actual content of the printed product, is first transferred to a transfer device, wherein the cadence of the brought-up sheet and additional sheet is in a certain operative connection with the conveying speed of the transfer device in their operation. From this it can be provided that the cadence of the brought-up printed sheet or the conveying speed of the transfer device can be selected individually so that clocks can be omitted as a placeholder for the subsequently added additional sheet. Such an operative connection between the individual operational Speeds can preferably be achieved with a comprehensive adaptive control.

Another essential advantage of the invention is to be seen in the fact that the conveyor system in the environment of the transfer device can be extended by means of a circulating chain with grippers (see to supplement this technical environment EP 1 312 568 ). Seen in this way, every second gripper can be fed with a printing sheet, whereby the position-relevant gripper can be fed by another product stream before or after an additional sheet, such that in a following step the said sheets are all taken out of the transfer device and stacked into book blocks can.
This results in the advantageous aspects that the method thus constructed allows very high speeds in the insertion process, which at the same time allow high speeds to print on-line the feeding streams in terms of both the signatures and the supplementary sheets.

Another advantage of the invention lies in the fact that the sheet, and if necessary, the additional sheet, can be produced with their content from a digital printing press, these sheets can also be printed sequentially. If a printed product is printed sequentially, this means that the digital printing press begins with the first printed sheet of the printed product, and the subsequent printed sheets, which complete the printed product, are added immediately. Digital printing machines work without a fixed printing plate, and therefore can operate in the mentioned way.

In this case, the transfer device forms a central element of the process.

Advantageously, this transfer device from a blade-like infeed star, also called fan wheel formed, which receives the zoomed sheet and / or additional sheet between the spaces created for this, whereby by the rotational movement of this fan wheel these sheets are then within a certain arc angle and along at least one level forwarded and then stacked to a book block. The elements of the inlet star may be straight or have a blade-like curved geometry.

Another preferred embodiment of such a transfer device is formed on the basis of an endless transport chain, said chain has spaced apart pocket-shaped receiving points, wherein the print and additional sheets for further transport recording. Preferably, at a first change of direction of the transport chain then the stacking of the sheet takes place. The spaces resp. the pocket-shaped receiving points can be extended if necessary with individual holding means which fixes the individual sheets at least during transport position stable non-positively.

A further advantage of the invention relates to the variability in how the printing and additional sheets can be transported along the respective feeding transport path: they can be individually spaced apart or conveyed further by means of a shingled stream, and furthermore they can be conveyed upstream of the transfer device by means of a simple or Always upstream of this transfer device, these folds can preferably be carried out after a preceding separation operation, wherein such separation operations can be made longitudinally or transversely to the printed paper web, which leads to a high flexibility of the method.

Basically, it is assumed that the printed sheets, and of course, if necessary, the additional sheet, are processed by a simple fold. However, it is readily possible to provide multiple, for the sheet stiffness-promoting folds, in which case after the stacking to print products and subsequent to any further processing by means of the size trim the excess seaming margins are cut off.

Advantageous and expedient developments of the inventive task solution are characterized in the further dependent claims.

In the following, embodiments of the invention will be explained in more detail with reference to the drawing. All features that are immaterial to the instant understanding of the invention have been omitted. Identical features are provided in the various figures with the same reference numerals.

Brief description of the figures

Fig. 1

ein Transportsystem mindestens eines Druckbogens und/oder Zusatzbogens mittels einer rotativen Übergabevorrichtung,

Fig. 2

ein Transportsystem mindestens eines Druckbogens und/oder Zusatzbogens mittel eines Transportbandes.

It shows:

Fig. 1

a transport system of at least one printed sheet and / or additional sheet by means of a rotary transfer device,

Fig. 2

a transport system of at least one printed sheet and / or additional sheet means of a conveyor belt.

Ways to carry out the invention

Fig. 1 Subsequently, the transport 11 of the folded printed sheet 10, and then the transfer of the same to a transfer device 3, which consists of a fan wheel with paddle-like pockets. On the other hand, 21 additional sheets 20 are introduced via a separately operated product stream, which are introduced into the spaces 13 of the transfer device 3 predefined by a controller 43. The transfer device 3 conveys fan-shaped the zoomed and placed in the spaces 13 printing and additional sheet on a certain arc angle on, so that these sheets and additional sheets leak at a certain point from the spaces 13 or are ejected and then stacked directly to a stack 30 become. This stacking therefore forms a congruent sequence of the continuous within the transfer device 3 compiled print and supplemental sheet.

How out Fig. 1 it can be seen, individual tailored signatures 1 are folded in the transverse direction by a folding device 2 to form a sheet 10. The supplied printed sheet 44 may already have one or more fold breaks. Of course, the sheet 10 and additional sheet 20 can be printed as a single sheets. The representation according to Fig. 1 Here, however, refers to a folding device, which is designed so that the back fold 12 of the sheet 10 is in advance in the transport direction 11 so that it can be easily inserted and positioned in the associated space 13. The same applies to the additional sheets 20, which are introduced via a second product stream 21, wherein they can be readily subjected to at least one fold previously. However, this does not mean that the advance back fold represents a compelling transport process. Of course, a sheet 10 or additional sheet 20 can also be fed with an open side ahead. The printed sheets 10 are released after an angular movement of about 180 ° from the spaces 13 respectively. ejected, wherein the respective back fold 12 is trailing, that has the same book block-related position as upstream of the transfer device, and the folded sheet 10 now, based on the stack 30, front one or more openings. The same also applies to the Rückenfalzes 12 for the additional sheet 20, if such a fold is made. These additional sheets take intermediate the free bars between the unoccupied by the sheet 10 spaces 13 in the fan wheel, the latter being transported over an arc angle, ie via a rotary or quasi-rotary translation of exemplary about 90 °.

Already by a simple folding can be achieved for the transport of printing and additional sheet a good stabilizing stiffness, so that the subsequent stacking 30 can be made positionally secure. Reference is made to the explanations below. However, the additional sheets 20 can not exclusively occupy individual free spaces 13, but they can, depending on the composition of the book block, readily be inserted directly into the open fold of each sheet 10, in which case opening systems must be provided. This is particularly useful if the additional sheet in the book block has to fulfill the function of a Einsteckbogens.

Thus, the flexibility of the system is obvious, because it can be easily with the same transfer device 3 additional resp. provide different product streams with different Einsteckbogen. As will be discussed in more detail below, the fan-shaped subdivision of this transfer device 3 has individual scoop-shaped elements 4 concavely curved in the direction of rotation, the course of which acts in particular against the centrifugal forces arising in the direction of rotation. The concave curvature of the blade-shaped elements 4 on the inside therefore increases the centripetal force emanating from the mass of the transported sheets, so that the sheets remain stable during transport even at high rotations. The curvature of the paddle-shaped elements reverses their affinity in the region of the stacking and causes the sheets to more easily slip out of the gap 13 in the region of the stacking over the convex surface of the paddle-shaped element, such curvature also providing a transfer of the sheets in conformity with the movement ensures the stacking, in particular when the transfer dynamics is unwound so that the front of the sheet to be deposited is previously ejected and successively deposited by the rotation, so that a pressure-related stabilizing effect of the incoming sheet over the preceding sheet is formed, this is particularly true if the stacking process intermittently resp. flying done. The elements 4 of the fan wheel need not necessarily be formed scoop-shaped, namely they serve primarily to separate the individual sheets 10 and additional sheet 20 from each other and the pocket-shaped gap to accommodate additional sheets 20 to be determined by the controller 43 continuously, also adaptively , This control thus determines how the spaces 13 are clocked, i. Interspaces can be provided after a monotonous cycle, ie after every printing sheet, or after every two successive printed sheets, etc., or else sequences can be provided whose interspaces are arranged according to irregular arithmetic or geometric series of numbers.

Fig. 2 shows a further transfer device 40, which is designed as a transport chain. This endlessly running transport chain 40, which here in the Fig. 2 simplicity is shown, is equipped with spaced and upper side open channels 41, which fulfill the function of receiving points equipped, which behave towards the sheet like pockets, and which are designed for the continuous recording and transport of sheet 10 and additional sheet 20. The channels 41 may also be designed as brackets, which exert a force-locking holding force on the printed product. The opening width of the open slot 42 is dimensioned so that said sheets 10, 20 can be easily inserted during delivery, that these sheets can be transported position stable during translation, and then these sheets can easily eject in the stacking. Therefore, because of the different functions to be performed, the design of this receiving location is of the utmost importance, since the impacted cycles are extremely high, so that centrifugal forces and fluttering movements and other interferences can automatically arise, which indicate the rigidity of the folded ones indicated by the stiffness Could easily exceed the printed sheet. This narrow design of the receiving location is an essential component of the transfer device, also because it is not excluded that the additional sheet may consist of individual non-folded sheet.

The flexibility of the system is only maximized when the receiving stations can record any printed sheets and any additional sheets continuously and can be safely transported. On the other hand, it is true that in particular the printed sheets 20 are not allowed to clamp too much in the retaining clips indicated by the slots 42, because this could substantially inhibit their ejection in the area of the stack 30, which could lead to a disruption of the process and to incorrect stacking , Also according to the system Fig. 2 acts a controller, not shown, which is similar to in Fig. 1 is constructed.

It also applies here that this control determines how the interspaces are to be clocked, ie, interspaces may be provided after a monotonous clock, ie after each print sheet, or after two consecutive press sheets, etc., or sequences may also be provided become, whose interspaces are arranged according to irregular arithmetic or geometric series of numbers.

In principle, the transfer devices 3, 40 described are constructed so that the forces which occur in the case of high-performance transportation of the printed sheets and additional sheets and the subsequent stacking, such as the centrifugal forces in the star-shaped transfer device 3, can not have any negative effects on the formation of the stack , Folded sheets generally have a very high dimensional stability, which is advantageous for the reliable and dimensionally accurate stacking.

Claims (18)

A method for producing a printed product, wherein the printed product is composed of at least one printed sheet and / or at least one additional sheet, wherein printed sheet and additional sheet from different product streams are introduced, characterized in that between at least a first product stream (11) for sheet (10) and at least one second product stream (21) for additional sheet (20) on the one hand and at least one stacking device (30) on the other hand, at least one transfer device (3, 40) is interposed therebetween, and that clocked by a controller (43) those spaces (13) in the transfer device which are intended to receive the additional sheets (20). A method according to claim 1, characterized in that the spaces for receiving the additional sheet with respect to the supplied sheet are clocked by the controller. A method according to claim 2, characterized in that the spaces for the additional sheet against the supplied sheet are provided after a monotonous single or multiple clock, or are clocked by sequences whose intervals are arranged according to regular or irregular arithmetic and / or geometric series of numbers. A method according to claim 1, characterized in that the printed sheets and additional sheets are transported at least along each of a product stream (11, 21) to the transfer device, and that the sheet and additional sheets are individually spaced or transported by a scale flow. A method according to claim 1, characterized in that the transfer device consists of a blade-like fan wheel (3), which brought the zoom Compresses sheet and / or additional sheet between the indexed by the control spaces, and that by a rotary or quasi-rotary movement of the transfer device, these sheets are conveyed over a circumferential angle within at least one plane. A method according to claim 5, characterized in that the fan wheel in the circumferential direction has spaced separating elements (4). A method according to claim 6, characterized in that the separating elements (4) are straight or blade-like curved elements, and that the inner surface is formed in the blade-like curved elements in the direction of rotation concave shaped. Method according to one of claims 5-7, characterized in that the rotary movement of the fan wheel takes place uniformly or adaptively with motion profiles, or is operated in dependence on the speeds of the product streams (11, 21). A method according to claim 1, characterized in that the transfer device consists of an endlessly running conveyor chain (40) having spaced apart receiving points (41), wherein the zoomed sheet and / or additional sheets are placed, and that these sheets by a substantially translative Movement be carried along at least one level. A method according to claim 9, characterized in that the translational movement of the transfer device (40) takes place uniformly or adaptively with movement profiles, or is operated in dependence on the velocities of the product streams (11, 21). A method according to claim 1, characterized in that at least one printed sheet and / or at least one additional sheet each upstream of the transfer device (3, 40) are folded one or more times. Method according to one of claims 1-11, characterized in that at concordant movement direction between the movement of the transfer device and the movement during transport of the sheet and additional sheet to the transfer device, the relative speed of the two movements in the transfer of the sheet and additional sheet to the transfer device towards zero sought. A method according to claim 10, characterized in that the speeds of the two movements are mutually adaptively or adaptively changed with movement profiles. Method according to one of claims 1-13, characterized in that the printed sheets and additional sheets along the respective feeding flow individually spaced apart or transported in scale flow. Apparatus for carrying out a method for producing a printed product, wherein the printed product is composed of at least one printed sheet and / or at least one additional sheet, sheet and additional sheet from different flow rates are approachable, characterized in that between at least a first flow (11) for sheet (10) and at least one second flow (21) for additional sheet (20) on the one hand and at least one stacking device (30) on the other hand, at least one transfer device (3) is interposed therebetween, and that the transfer device consists of a fan wheel, which in the circumferential direction spaced from each other Separating elements (4) has. Apparatus according to claim 15, characterized in that the separating elements (4) are straight or blade-like curved elements, and that the inner surface is formed in the blade-like curved elements in the direction of rotation concave. Apparatus for carrying out a method for producing a printed product, wherein the printed product is composed of at least one printed sheet and / or at least one additional sheet, sheet and additional sheet from different flow rates are approachable, characterized in that between at least a first flow (11) for sheet (10) and at least one second flow (21) for additional sheet (20) on the one hand and at least one stacking device (30) on the other hand, at least one transfer device (40) is interposed therebetween, and that the transfer device consists of an endlessly running conveyor chain, which spaced-apart receiving points (41), wherein the supplied printed sheets and / or additional sheets are arranged. Apparatus according to claim 17, characterized in that the receiving points are designed as retaining clips.

Images