Patent Application
20130058739
The solution according to one or more embodiments of the present invention relates to the bookbinding field. More specifically, this solution relates to bookbinding binding machines.
Bookbinding binding machines are commonly used to make books starting from corresponding blocks of signatures (each one of them being formed by folding a printed sheet one or more times for defining corresponding pages of the books). Particularly, in the case of bookbinding sewing machines (or simply sewing machines), the signatures are fed in succession to a sewing station, which sews each signature to the preceding ones of a corresponding book block by means of continuous threads. Typically, the sewing station comprises a movable saddle, which individually receives the signatures when in an open position (moved away from a sewing head being formed by a bank of needles and crochets); the movable saddle is then closed for transporting the signature to the sewing head.
Historically, the sewing machine was born as a stand-alone component, with manual feeding of the signatures (i.e., wherein the signatures were deposited onto the movable saddle by an operator). Later on, a transport system has been connected to the sewing machine for facilitating its feeding (being always manual); typically, the transport system was formed by a fixed saddle; the signatures were manually deposited astride the fixed saddle, which transported them in succession to the sewing station, so that each signature was individually thrown onto the movable saddle (being aligned with the fixed saddle when in the open position). Afterwards, a feeding system has been connected to the sewing machine for automating its feeding; the feeding system extracted the signatures in succession from a hopper, opened them in the middle (separating, by means of suckers, its layers each one defined by a fold of the corresponding sheet), and deposited them astride the fixed saddle. Both the transport system and the feeding system were lacking their own motor, and they were connected mechanically to the sewing machine (being provided with its own motor); the transport system and the feeding system were then driven by the same motor of the sewing machine, so as to work synchronously with the sewing machine (i.e., with its sewing station). More recently; the transport system and the feeding system have been integrated into the sewing machine (in corresponding transport station and feeding station, respective); the transport station and the feeding station have continued to be connected mechanically in a fixed way to the motor of the sewing machine, so as to work always synchronously with the sewing station.
A problem of the known sewing machines is the difficulty of sewing signatures being small (i.e., formed by few pages—for example, 4-8 pages per signature) and/or light (i.e., formed by sheets of thin paper—for example, with a weight in grams of 30-60 g/m2). Indeed, in this case the threads may tear the signatures around corresponding holes being made in the signatures for their sewing. Particularly, the drawback pointed out above occurs rather commonly in case the sheets of the signatures are printed with digital printers—instead of offset printers. Indeed, the digital printers (although more versatile than the offset printers, since they allow varying the pages of the signatures in a simple and fast way without the need of creating any printing plate) are not normally capable of printing sheets of very large size, so that the corresponding signatures have a limited number of pages.
In order to overcome such drawback, small and/or light signatures are normally sewn with threads being less tight; however, this impairs the compactness and the integrity of the book block during the next processing phases (causing the production of books being defective or in any case of lower quality). Moreover, it is possible to use a stagger stitch sewing technique (wherein each needle alternatively cooperates with a next crochet and with a preceding crochet), so as to distribute the threads in a more uniform way along the signatures. However, the stagger stitch sewing technique is relatively complicated and it requires a more complex structure of the sewing head (for transporting each thread from the corresponding needle alternatively to the two adjacent crochets); moreover, this does not allow obtaining satisfactory results all the same in case of signatures formed by very few sheets (and in particular by single sheets being folded only once to define 4 pages—in jargon, a four-page signature) and/or with very thin paper.
Alternatively, it is also possible to provide composite (in jargon, overlapped) signatures to the sewing machine; each overlapped signature is formed by more signatures being simply overlapped one to another (so as to make it stronger). However, the formation of the overlapped signatures is more complex (since it requires additional operations after the folding). Moreover, the opening of each overlapped signature in the sewing machine is problematic, because of its high number of layers to be separated; indeed, the suckers commonly used for this purpose may be insufficient to reach the middle thereof. In such case, it is necessary to form the overlapped signature with a projecting lap, and to provide the sewing machine with a blade that intercepts such lap for opening the overlapped signature. However, this requires non-standard folding operations and complicates the structure of the sewing machine.
Recently, sewing machines have also been proposed that implement both the formation of the signatures and their sewing in a single passage. Particularly, each one of these sewing machines (indicated as combined sewing machines to distinguish them from the above-described sewing machines, indicated as traditional sewing machines) is provided with a gathering device that extracts flat sheets in succession from a hopper, and stacks them for forming groups of sheets corresponding to the signatures; as soon as each group of sheets is completed, it is transferred to a folding device, which folds it so as to obtain the corresponding signature. Each signature thus obtained is then deposited astride the fixed saddle, in order to be transported to the sewing station as usual. In this case, the gathering device and the folding device are driven independently of the transport station and the sewing station (instead always connected between them mechanically in fixed way). An example of combined sewing machine is described in EP-A-0846573 (the entire disclosure if which is herein incorporated by reference), while an example of combined sewing machine being available on the market is KRISTEC by Meccanotecnica S.p.A. (KRISTEC is a registered trademark of Meccanotecnica S.p.A in some countries).
The combined sewing machines allow producing books on request in a very simple way; therefore, they lend themselves particularly to be used for the production of books of limited edition, even of a few units (especially in case the corresponding sheets are provided by digital printers). However, the signatures formed in the combined sewing machines only have a few folds (generally, a single one). Therefore, in case of signatures formed be few sheets (especially if made of thin paper) they suffer the same drawbacks pointed out above for the traditional sewing machines. On the contrary, the formation of signatures of many sheets makes the combined sewing machines very slow (since they require collecting all the sheets of each signature in succession before its folding).
One or more aspects of the solution according to specific embodiments of the invention are set out in the independent claims, with advantageous features of the same solution that are set out in the dependent claims, whose wording is herein incorporated verbatim by reference (with any advantageous feature provided with reference to a specific aspect of the solution according to an embodiment of the invention that applies maxis mutandis to every other aspect thereof).
More specifically, an aspect of the solution according to an embodiment of the invention provides a multi-function binding machine (for example, a multi-function sewing machine). The multi-function binding machine comprises a binding station for binding blocks of signatures (for example, a sewing station for sewing them); the multi-function binding machine is provided with a feeding station for receiving signatures in succession (for example, extracted from the bottom of a stack), opening the signatures, and feeding the signatures to the binding station (for example, through a transport station based on a fixed saddle). In the solution according to an embodiment of the invention, the multi-function binding machine comprise a further feeding station for receiving pre-signatures in successions (for example, consisting of flat sheets extracted from the top of a stack), folding groups of at least one pre-signature into further signatures, and feeding the further signatures to the binding station.
Another aspect of the solution according to an embodiment of the invention provides a binding machine (for example, a sewing machine). The binding machine comprises a binding station for binding blocks of signatures (for example, a sewing station for sewing them). The binding machine is provided with a feeding station for receiving signatures in successions (for example, extracted from the bottom of a stack), opening the signatures, and feeding the signatures to the binding station (for example, through a transport station based on a fixed saddle). In the solution according to an embodiment of the invention, the binding machine further comprises binding driving means for driving the binding station and feeding driving means for driving the feeding station (for example, two corresponding motors). Control means is provided for controlling the binding driving means and the feeding driving means independently during a processing of the signatures.
Different aspects of the solution according to embodiments of the invention provide corresponding methods.
Other aspects of the solution according to embodiments of the invention provide software programs for implementing these methods.
Further aspects of the solution according to embodiments of the invention provide corresponding program products.
The solution according to one or more embodiments of the invention, as well as further features and the advantages thereof, will be best understood with reference to the following detailed description, given purely by way of a non-restrictive indication, to be read in conjunction with the accompanying drawings (wherein, for the sake of simplicity, corresponding elements are denoted with equal or similar references and their explanation is not repeated). In this respect, it is expressly intended that the figures are not necessary drawn to scale (with some details that may be exaggerated and/or simplified) and that, unless otherwise indicated, they are merely used to conceptually illustrate the structures and procedures described herein. Particularly:
FIG. 6A-FIG-6B show various examples of overlapped signatures that may be obtained by applying the solution according to an embodiment of the invention,
With reference in particular to the
Particularly, a hopper 110 is used for loading a stack of signatures 105 (grouped in blocks, each one for a correspondent book). The sewing machine 100 is then provided with a feeding station 115. Particularly, the feeding station 115 comprises an extraction device 120 and an opening device 125. The extraction device 120 (for example, sucker-based pliers) extracts the signatures 105 in succession from a bottom of the hopper 110, and provides them to the opening device 125; in turn, the opening device 125 (for example, based on a series of lower and upper suckers) opens each signature 105 in the middle, and feeds it to a transport station 130. The transport station 130 then transports the signatures 105 in succession to a sewing station 135. Particularly, the transport station 130 comprises a fixed saddle 140, a shaping station 145, and a throwing wheel 150. The fixed saddle 150 is formed by a saddle plate (wedge-like shaped, like an overturned V), astride of which the feeding, station 115 deposits each (opened) signature 105. A chain with pushing pegs (not shown in the figure) is housed inside the saddle plate, so that the pegs project through a longitudinal slit of the saddle plate (in correspondence to its vertex) for pushing the signatures 105 along it (across the shaping station 145 and then to the throwing wheel 150). The throwing wheel 150 accelerates each signature 105, so as to separate it from the preceding ones and through it individually towards the sewing station 135. Particularly, the sewing station 135 comprises a movable saddle 155 and a sewing head 160. The movable saddle 155 receives each signature 105 from the fixed saddle 140 (when it is open so as to be aligned therewith). The movable saddle 145 is then raised for bringing the signature 105 below the sewing head 160; the sewing head 160 sews the signature 105 being loaded on the movable saddle 155 by means of continuous threads to a current book block in the making (by joining it to a preceding signature of the book block if different from the first one). As soon as the book block is completed, the threads are cut for separating it from the next signatures. The book blocks so obtained (denoted with the reference 165) are placed in succession onto an output conveyor 170, which supplies them to further machines (not shown in the figure) that complete the corresponding books. The operation of the entire sewing machine 100 is managed by a programmable logic controller (PLC) 175. Generally, the controller 175 is provided with a control unit, a working volatile memory (or RAM), and a non-volatile memory (for example, an EEPROM) for storing programs and data; the control unit is connected in a conventional way to a control panel (for example, of touch-screen type).
A functional block diagram of the sewing machine 100 according to an embodiment of the invention is shown in the
Particularly, in a specific implementation the sewing machine 100 is provided with two distinct motors 205 and 210 (with respective control encoders or resolvers) for driving the feeding station 115 and the sewing station 135, respectively; in this case, the controller 175 controls the motors 205 and 210 independently.
As a further improvement, the transport station 130 as well is driven independently of the feeding station 115 (and then from the sewing station 135 as well) during the processing of the signatures. Particularly, in a specific implementation the sewing machine 100 is provided with a further motor 215 (with respective encoder or resolver) for driving the transport station 130; in this case, the controller 175 controls all the motors 205, 210 and 215 independently.
The above-described structure makes the sewing machine 100 very versatile;
indeed, the possibility of driving the feeding station 115 and the sewing station 135 (and possibly the transport station 130 as well) independently allows stopping the corresponding stations selectively and/or operating them at different speed (during the processing of the signatures). This provides a number of advantages.
For example, in this way it is possible to stack two or more signatures onto the fixed saddle, so as to form corresponding overlapped signatures (hereinafter, the signatures that compose the overlapped signatures are indicated as simple signatures for distinguishing them therefrom). This allows sewing the signatures without any problem, even when they are small (i.e., formed by few pages) and/or light (i.e., formed by sheets of thin paper). Indeed, the overlapped signatures thus obtained are stronger, thereby reducing the risk that the threads may tear the signatures (around corresponding holes made in the signatures for their sewing). Particularly, this advantage is mostly appreciated in case the sheets of the signatures are printed with digital printers (instead of with offset printers)—even if the application of the proposed solution is not limited thereto; this allows exploiting all the advantages offered by the digital printers (i.e., their greater versatility that allows varying the pages of the signatures in a simple and fast way without the need of creating any printing plate), without suffering the drawbacks caused by the generally limited size of the sheets printed by them (which involves the creation of corresponding signatures with limited number of pages). Moreover, in this case it is also much easier modifying the printing of the simple signatures so that their pages appear in the correct order within the overlapped signatures. Generally, this allows obtaining satisfactory results (in terms of compactness and integrity of the book blocks, thus of quality of the corresponding books) even with small and/or light signatures. In this respect, it should be noted that the proposed solution allows forming the overlapped signatures directly on the fixed saddle of the sewing machine; in this way, it is possible to exploit the advantages of the overlapped signatures (i.e., greater robustness) without the corresponding drawbacks (i.e., additional operations after the folding and opening difficulty).
Different examples of application of the solution according to corresponding embodiments of the invention are shown in the
With reference in particular to the
For example, the situation illustrated in the
During an operative cycle of the sewing station 135, an operative cycle of the transport station 130, and an operative cycle of the feeding station 115 (equal one to another), as shown in the
With reference instead to the
For example, in case of overlapped signatures each one formed by 3 simple signatures, the situation illustrated in the
During an operative cycle of the sewing station 135, an operative cycle of the transport station 130, and an operative cycle of the feeding station 115 (equal one to another), as shown in the
Considering now the
Likewise, as shown in the
Alternatively, as shown in the
For example, in the same case as above wherein each overlapped signature is formed by 3 simple signatures, the sewing station 135 has an operative frequency equal to ⅓ of the operative frequency of the feeding station 115; therefore, during each operative cycle of the feeding station 115 (defined by its phase Φf from 0° to 360°, equal to a complete turn of a shaft of the corresponding motor), the sewing station 135 completes a fraction—⅓—of its operative cycle (defined by its phase Φs from 0° to 120°, from 120° to 240°, and 240° to 360°, respectively, of a complete turn of a shaft of the corresponding motor).
In this respect, the situation illustrated in the
During a last fraction of an operative cycle of the sewing station 135 (phase) Φs=240°-360°, the transport station 130 and the feeding station 115 perform corresponding complete operative cycles (equal to each other); therefore, as shown in the
Considering now the
During a second fraction of the operative cycle of the sewing station 135 (phase ΦS=120°-240°), as shown in the
Passing to the FIG. 6-A-FIG-6B, various examples of overlapped signatures are shown that may be obtained by applying the solution according to an embodiment of the invention.
In particular, the
The
With reference now to the
As above, the sewing machine 700 comprises a hopper 110 for loading the stack of signatures 105, the feeding station 115 (with the extraction device 120 and the opening device 125), the transport station 130 (with the fixed saddle 140, the shaping station 145, and the throwing wheel 150), the sewing station 135 (with the movable saddle 155 and the sewing head 160), the output conveyor 170 for receiving the book blocks 165, and the controller 175.
In the solution according to an embodiment of the invention, the sewing machine 700 is also capable of making, in a single passage, gathering, folding and sewing operations of (flat) printed sheets 705, which are generally, but not necessarily, supplied by digital printers (not shown in the figure)—analogously to what happens in the known combined sewing machines (for example, as described in the above-mentioned document EP-A-0846573). For this purpose, the sewing machine 700 comprises a further hopper 710, which is used for loading a stack of sheets 705 (grouped in blocks, each one for a correspondent book). The sewing machine 700 is then provided with another feeding station 715. Particularly, the feeding station 715 comprises an extraction device 720, a gathering device 726 and a folding device 727. The extraction device 720 (for example, sucker-based) extracts the sheets 705 in succession from the top of the hopper 710 (wherein they are maintained pushed upwards, so as to be always aligned with the extraction device 720), and it supplies them to the gathering device 726. In the gathering device 726, the sheets 705 are stacked one on top of the other so as to add to a current group of sheets 728 in the making. As soon as the group of (one or more) sheets 728 is completed (with all the sheets 705 of a corresponding current signature), the group of sheets 728 is transferred from the gathering device 726 to the folding device 727 that folds it so as to obtain such signature, denoted with the reference 729. Particularly, the group of sheets 728 is placed onto a chute (or any other plate), which is provided with a slit arranged parallel to a feeding direction of the group of sheets 728. A blade is extracted through the slit of the chute, so as to fold the group of sheets 728 in a central portion thereof that is brought inside a pair of jaws above the chute. The blade is then retracted under the chute and the jaws are tightened so as to form the signature 729. At this point, the jaws are opened and the signature 729 so obtained is supplied to the transport station 130 (with the signature 729, already opened in part, which is placed astride its fixed saddle). The operation of the feeding station 715 as well is managed by the controller 175.
A functional block diagram of the sewing machine 700 according to an embodiment of the invention is shown in the
In the solution according to an embodiment of the invention, the feeding station 715 is driven independently of the feeding station 115 (and then of the sewing station 135, and possibly of the transport station 130 as well). Particularly, in a specific implementation the sewing machine 700 is provided with a further motor 805 (with respective encoder or revolver) for driving the feeding station 715; in this case, the controller 175 controls all the motors 205, 210, 215 and 805 independently during the processing, of the signatures (with the possibility of stopping the corresponding stations selectively and/or operating them at different speed).
The above-described structure allows making the sewing machine 700 multi-function, since (as described in detail in the following) it is capable of processing both the signatures being supplied already ready (as in the traditional sewing machines) and the signatures being formed from the sheets (as in the combined sewing machines); moreover, such sewing machine 700 is extremely versatile, since such signatures may be processed in any desired way, either alternated or combined among them. This allows exploiting the advantages of both the traditional sewing machines and the combined sewing machines without the respective drawbacks; for example, it is possible always to use the (faster) signatures being supplied already ready, and the signatures being formed from the sheets only when it is necessary (for example, for adding inserts).
Particularly, the sewing machine 700 may be used for sewing together signatures being supplied already ready like in a stand-alone traditional sewing machine; for this purpose, the controller 175 only drives the feeding station 115, the transport station 130 and the sewing station 135—while the feeding station 715 is always maintained not working. In this way, it is possible to sew simple signatures together (analogously to what has been described with respect to the
Moreover, the sewing machine 700 may be used for sewing together the signatures formed from the sheets like in a stand-alone combined sewing machine; for this purpose, the controller 175 only drives the feeding station 715, the transport station 130 and the sewing station 135—while the feeding station 115 is always maintained not working.
A corresponding example of application of the solution according to an embodiment of the invention is shown in the
Particularly, in case of signatures each one formed by two sheets, the situation illustrated in the
During an operative cycle of the sewing station 135, an operative cycle of the transport station 130, and an operative cycle of the feeding station 715 (equal one to another), as shown in the
Considering now the
With reference now to the FIG. 10A-FIG-10D, the sewing machine may also be used for forming and sewing together overlapped signatures, each one of them being formed by signatures coming in part from the feeding station 115 (i.e., obtained by opening signatures being supplied already ready) and in part from the feeding station 715 (i.e., obtained by folding groups of sheets); for this purpose, during the formation of each overlapped signature the controller of the sewing machine alternatively drives the feeding station 115 and the feeding station 715 for supplying a corresponding signature to the transport station 130, which is instead maintained not working (with the sewing station 135 that is also maintained not working or driven at reduced operative frequency); moreover, the feeding station 715 may also be driven while the feeding station 115 supplies its own signatures to the transport station 130, so as to form, in the meantime, its own signature to be supplied later on to the transport station 130; this allows recovering, at least partially, the time required for the formation of the signatures in the feeding station 715 (with a beneficial effect on the yield of the entire sewing machine).
For example, in case of overlapped signatures each one formed by 2 signatures being supplied already ready (to the feeding station 115) and 1 signature being formed by folding a single sheet (in the feeding station 715), the situation illustrated in the
Considering now the
Moving to the
With reference now to the
Passing to the
Naturally, in order to satisfy local and specific requirements, a person skilled in the art may apply to the solution described above many logical and/or physical modifications and alterations. More specifically, although this solution has been described with a certain degree of particularity with reference to one or more embodiments thereof, it should be understood that various omissions, substitutions and changes in the form and details as well as other embodiments are possible (for example, with respect to process parameters, materials and size). Particularly, different embodiments of the invention may even be practiced without the specific details (such as the numerical examples) set forth in the preceding description to provide a more thorough understanding thereof; conversely, well-known features may have been omitted or simplified in order not to obscure the description with unnecessary particulars. Moreover, it is expressly intended that specific elements and/or method steps described in connection with any embodiment of the disclosed solution may be incorporated in any other embodiment as a matter of general design choice. In any case, the terms include, comprise, have and contain (and any forms thereof) should be intended with an open, non-exhaustive meaning (i.e., not limited to the recited items), the terms based on, dependent on, according to, function of (and any forms thereof) should be intended as a non-exclusive relationship (i.e., with possible further variable involved), and the term a/an should be intended as one or more items (unless expressly indicated otherwise).
For example, similar considerations apply if the sewing machine has a different structure or comprises equivalent components, or is has different operative characteristics. In any case, every component thereof may be separated into more elements, or two or more components may be combined together into a single element; moreover, each component may be replicated to support the execution of the corresponding operations in parallel. It is also pointed out that (unless specified otherwise) any interaction between different components generally does not need to be continuous, and it may be either direct 5, or indirect through one or more intermediaries.
More generally, although in the preceding description specific reference has been made to a sewing machine, the same solution may find application in other binding machines as well (for example, wherein the signatures are joined together with staples). Moreover, the feeding, sewing and/or transport stations of the sewing machine may be controlled by means of equivalent devices (for example, an external computer).
The sewing machine may be controlled in any other way (by controlling the feeding station, the transport station and/or the sewing station independently among them). For example, nothing prevents maintaining the sewing station and the transport station connected mechanically between them in a fixed way; in any case, the same solution also lends itself to be used in a sewing machine without any transport station (wherein the signatures are directly supplied from the feeding station to the sewing station).
Moreover, in a different embodiment of the invention two or more stations of the sewing machine share a same motor; in this case, their independent driving may be obtained with mechanical decoupling systems (for example, based on a corresponding gearbox).
The independent driving of the feeding station and of the sewing station (and possibly of the transport station as well) may also be exploited for other applications (in addition or in alternative to the formation of the overlapped signatures directly in the sewing machine).
For example, in order to make a blind stitch at the end of each book block (i.e., a sewing stitch without any signature for preventing the threads from re-entering into a last signature after their cut) it is possible to maintain the feeding station and possibly the transport station as well not working during an operative cycle of the sewing station. This allows avoiding the problems caused by the known techniques wherein the feeding station works continuously with only the hold (for example, sucker-based) of the extraction device that is disabled—with the risk that the signature at the bottom of the hopper is extracted in any case by adhesion with such suckers.
Another possible application consists in the automatic restoration of an empty position among the signatures being caused by a missed extraction of the corresponding signature from the hopper. In such case, in response to the detection of such error in the extraction device (for example, by means of a corresponding presence sensor) it is possible to drive the feeding station only (maintaining the transport station and the sewing station not working) until restoring the correct sequence of the signatures. This allows correcting the error automatically without the need of any manual intervention (with corresponding stop of the sewing machine).
Considering in particular the formation of the overlapped signatures in the sewing machine, the same result may however be obtained in various way.
For example, in case the transport station is lacking, it is enough to maintain the sewing station not working during the formation of each overlapped signature directly thereon by the feeding station.
Alternatively, it is possible to drive the transport station continuously as well but at an operative frequency being reduced with respect to the one of the feeding station (by a factor equal to the number of simple signatures of each overlapped signature); in such case, the pushing pegs of the fixed saddle are spaced apart so as to reach the position in front of the feeding station after the corresponding overlapped signature has been completed (with possible problems for the integrity of the overlapped signatures caused by their reaching at, high speed by the pushing pegs that may be solved through an additional pre-acceleration device of the signatures on the fixed saddle).
All the considerations pointed out above apply to the multi-function sewing machine as well. For example, the feeding stations may be in any other number and arranged in any other position (for example, with the feeding station providing the signatures already ready moved downstream along the transport station, with the feeding stations at opposite sides of the transport station, or with multiple feeding stations of every type alternated along the transport station).
Particularly, when the feeding stations feed the corresponding signatures to different positions along the fixed saddle, they may also be driven to work concurrently (at least in part) so as to stack, the simple signatures of different composite signatures onto the fixed saddle at the same time (so as to recover, at least partially, the time required for the formation of the composite signatures—with a beneficial effect on the yield of the entire sewing machine).
Moreover, the signatures being formed from the sheets may have any number of folds (such as multiple crossing folds), which may be obtained by multiple passages through a single folding element or by passing through multiple folding elements in succession. In any case, the same signatures may be formed by folding (one or more times) pre-signatures lacking corresponding last folds.
Alternatively, the feeding station providing the signatures being formed from the sheets may only comprise a folding device without any gathering device (with each sheet that is folded individually and then supplied to the transport station directly); for example, the folding device may comprise a pair of belts, which transports each sheet extracted from the hopper through a pair of creasing rollers and then through a bank of one or more pairs of folding rollers. In this case, it is also possible to stack two or more signatures being formed from the sheets on the transport station (in front of the corresponding feeding station) and to move them in front of the other feeding station (for adding possible further signatures).
The multi-function sewing machine may be controlled in any other way. For example, the feeding stations may be driven at different operative frequencies (for example, with the feeding station providing the signatures being formed from the sheets that is faster than the feeding station providing the signatures already ready).
In a basic implementation, it is possible only to control the two feeding stations independently (while the feeding station of the signatures being supplied already ready is connected mechanically in a fixed way to the transport and sewing stations like in the standard sewing machines).
Moreover, the two feeding stations may only be used alternatively (for obtaining book blocks completely formed by signatures being supplied already ready or by signatures being formed from the sheets), the feeding station of the signatures being supplied already ready may only be used for sewing the signatures as they are supplied (without overlapping them), and so on.
It should be noted that the proposed solution also lends itself to be implemented and put on the market as a modification kit for its application to standard sewing machines (for example, for the addition of the feeding station of the signatures being formed from the sheets).
The same solution may be put into practice with an equivalent method (by using similar steps with the same functions of more steps or portions thereof, removing some steps being non-essential, or adding further optional steps); moreover, the steps may be performed in a different order, concurrently or in an interleaved way (at least in part).
Moreover, it is possible to implement the proposed solution as a stand-alone module, as a plug-in for a control program of the sewing machine, or even directly in the control program itself. Alternatively, the same solution may be applied in a system comprising a sewing machine and a separate computer (or any equivalent data-processing system). Similar considerations apply if the program (which may be used to implement each embodiment of the invention) has any other form suitable to be used by any data-processing system or in connection therewith; moreover, it is possible to provide the program on any computer-usable medium, and particularly as an article of manufacture on a non-transitory medium (for example, of magnetic type). In any case, the solution according to an embodiment of the present invention lends itself to be implemented even with a hardware structure (for example, integrated in a chip of semiconductor material), or with a combination of software and hardware suitably programmed or otherwise configured.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP11/65224 | 9/2/2011 | WO | 00 | 3/9/2012 |
