1. Field of the Invention
The invention relates to conveyors and, more particularly, to methods and devices for transferring and for processing of flexible, two-dimensional products, such as printed products.
2. Discussion of Related Art
In the conveyor technology and, in particular, conveyor technology for the conveyance of flexible, two-dimensional objects such as printed products, it is known in the art to convey such flexible, two-dimensional objects, or printed products, with the help of grippers that grasp the objects and serve as transporters. In particular, the products are conveyed from one workstation to the next workstation with the help of such gripper transporters. Each gripper transporter is, as a rule, driven at the same time and is controlled separately. This demands a corresponding number of drive units and controllers, which concomitantly requires a correspondingly high expense invested in capital equipment and in the maintenance of that equipment.
Transport between the workstations is effected along working paths with such gripper transporters, which are not at all flexible in use. If one working step is to be omitted from the manufacturing process, then a new transport path needs to be constructed to pass the associated workstation; moreover, when a workstation is removed from the working path, a transport path with a gripper transporter needs to span the space of the workstation that was removed. Consequently, I have discovered that any change in the work flow process may be both time and cost intensive.
Examples of such inflexible working paths are disclosed in a patent entitled Process And Device For Handling Printed Products by Ernst Luthi, issued as EP 0762950 B1, and in a patent entitled Improvements In Printing Machines by Herbert Fumival, et al., issued as GB 5861 on the 9 Feb. 1910. In GB 5861, the printed product to be cut is carried by the grippers of a gripper transporter to a cutting station, is transferred to the cutting station, and after the cutting, is transported away from the cutting station by way of either the grippers of the same transporter or by the grippers of a second gripper transporter connected downstream. In EP 0762950, the printed products that are conveyed during the cutting process are transferred to tension clips in order to stabilize these products during the cutting process, and are held in a fixed position. The grippers of the gripper transporter remain allocated during the cutting process to the printed products held by the tensioning clips so that the printed products are supplied to the cutting station and are led away from the cutting station again in each case by the same grippers.
In both devices, the cutting stations are a fixed component of the transport device. Such devices however, provide only desultory satisfaction of contemporary demands for a rapid resetting of the production line, e.g. a switch in production from large daily newspapers to weekly magazines, brochures and to different newspapers and magazines of varying size.
It is therefore, an object of the present invention to provide an improved device and method for transporting two-dimensional, flexible products between workstations.
It is another object to provide a device and method amenable to quick and inexpensive reconfiguration, for transporting flat objects of varying dimensions between a sequence of workstations.
It is still another object to provide a device and method for transporting two-dimensional, flexible products between workstations in an inexpensive and flexible manner.
It is yet another object to provide a device and a method with which the transport and any associated processing oftwo-dimensional, flexible products may be achieved in an inexpensive and flexible manner.
It is a further object to provide a device and a method with which the transport and any associated processing oftwo-dimensional, flexible products may be achieved between a varying plurality of workstations in an inexpensive and flexible manner.
It is an additional object to provide a device and a method amenable to rapid accommodation of alterations in the manufacturing processing of two-dimensional, flexible products.
According to the principles of the invention, the method and the device contemplate transport of each of a stream of flexible, two-dimensional manufacturing products, and in particular, printed products, with the same gripper transporter conveying an object to a workstation as well as away from that workstation. With the guidance of a controller, a logical allocation may be made between the flexible, two-dimensional products and grippers of the gripper transport in each case. Additional workstations may be introduced into the transport path and other workstations may be removed from the transport path, according to specific requirements for the current production run. In this manner, both the investment in capital equipment and the cost of maintenance for the capital equipment may be reduced to that for a single gripper transporter while concomitantly rendering the production line more flexible and readily adaptable to the specifications for different products. Flexible, two-dimensional products may be grasped and held by the grippers of the transporter at either the open end or at the fold.
Control may be realized in a particularly simple manner with a logical allocation of the same gripper that has conveyed a flexible, two-dimensional product to a workstation also transporting the same flexible, two-dimensional product away from that workstation.
At the same time, control is simplified because the gripper of the flexible two-dimensional product may be synchronously led together with the flexible, two-dimensional product during the manufacturing process, wherein the control of the gripper, and in particular, a slotted control guide for the gripper in the region of the processing, may be set in a variable manner so that the grippers for the conveyance of flexible, two-dimensional products may be either opened or may alternatively remain closed. Closed grippers are, above all, very useful for printed products, such as products assembled with several sheets folded together as a tabloid or products assembled with the insertion of enclosures between several sheets that have been folded together or that are to be connected to one another, such as by way of either stapling, stitching, gluing or other bonding of the constituent parts
The controller however, regulates the device and the processes performed so that there is a logical allocation of grippers and flexible, two-dimensional products to one another, with a gripper which has conveyed a flexible, two-dimensional product to a workstation, conveying another flexible, two-dimensional product away from the workstation. In this manner the controller may master speed differences.
Where necessary during the manufacturing process, flexible, two-dimensional products are supported during their manufacture by a support element. Depending upon whether the flexible, two-dimensional products are grasped and held by the grippers of the transporter at their open ends or at their folds, the products are either deposited onto the support elements with their folds upright and at the top or, alternatively, the support elements may be introduced between the products and support the flexible, two-dimensional products at their folds, which are directed downwardly.
The transport may lead over several workstations which may be arranged downstream in a serial manner along the transport path of the gripper transporter, or alternatively, arranged in parallel guided lines of the gripper transporter that are connected to one another via diverters, or points.
Workstations may be removed from the transport path of the gripper transporter by way of pivoting, or by hydraulically, electrically or pneumatically induced movement, such as by lowering or lifting the workstation, and the work paths may be rearranged in a very flexible manner; consequently the practice of the invention accommodates changes in the number and types of workstations, as well an rearrangement of the path of conveyance without much technical effort, thereby readily permitting the omission or incorporation of work steps into the path of conveyance through the manufacturing process.
If a device constructed according to the principles of the present invention is designed to lead a transporter along its transport path past a workstation, then the workstation preferably comprises a covering. When a corresponding step and the associated workstation are omitted from the manufacturing process, problems which would formerly be attributable to the conveyance of the flexible, two-dimensional products past the unused workstation may be conveniently avoided in the practice of the present invention Connecting devices, and in particular, stapling or stitching apparatus, or combined stapling and stitching apparatus, ultrasonic devices, mechanisms to apply glue or other adhesives for bindings, devices to place inserts into flexible, two-dimensional products, end-of-path collection, collection stapling, or stitching, paths, end-of-path insertion, and insertion, stapling, or stitching paths may be selectively provided as workstations, in conformance with the specifications of each manufacturing process.
A more complete appreciation of this invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:
Turning now to the drawings, it may be noted that the examples represented in
Device 10 is constructed as one example of the principles of the invention, with an opening device 22, a revolving deflection belt 24, and an opening wheel 26 connected thereto, and a spiral 30 connected to opening wheel 26. Further elements of device 10 include a connecting device 36, which in this example is designed as a rotation stapling/stitching apparatus 38, as well as a revolver 32 which, with its endlessly revolving conveyor member 15′, includes support elements 34 spaced-apart at a defined distance relative to one another.
With stapling/stitching apparatus 38, which is a rotary stapler/stitcher that carries several stapling/stitching heads 40 that are arranged spaced at uniform distances apart around the circumference of carrier disk 39. Other details about this type of stapling/stitching apparatus 38 are described, by way of example, in
According to the practice of the invention, printed products 16 are taken from transporter 12 of device 10 and are led directly to a workstation by the rotation and from a buffer or other conveyor. With this, printed products 16 may have one or more individual sheets, or layers, and in any case printed sheets folded in tabloid form or applied over one another (not illustrated here).
Transporter 12 in this example transports printed products 16 into the region of opening device 22, wherein the open ends of printed products 16 run out onto revolving deflection belt 24 of opening device 22 and, by way of belt 24 they are deflected; that is, belt 24 turns printed products 16 to have an orientation toward conveyor direction F, as is shown by
In an allocation region 31, opened printed products 16 are gradually laid onto support elements 34 of revolver 32 as transporter 12 and conveyor 15′ mutually move support elements 34 toward the apex, or fold, of successive ones of printed products 16. In the example shown here, grippers 14 are not actively opened but remain closed while holding printed products 16, and support elements 34 are drawn by the gradual mutual proximity of transporter 12 and revolver 32 against the clamping effect of gripper jaws 13 to ultimately penetrate between each set of gripper jaws 13. There also exists the possibility of supporting the penetration by way of an adapted opening of the grippers 14, e.g., controlled by slotted guides.
The distance of separation between grippers 14 on transporter 12 as well as the distance between support element 34 carried by revolver 32, and their respective speeds of conveyance, are suitably matched to one another so that an alignment of grippers 14 between printed products 16 and support elements 34 may continuously be attained effortlessly, while grippers 14 run essentially synchronously with support elements 34 in conveyor direction F.
Stapling is effected in the region of the stapling/stitching apparatus 38 in the usual manner a stapling is effected wherein benders 42 integrated into support elements 34 ensure the closure of the wire staples introduced by stapling/stitching heads 40 into printed products 16. It is to be understood that the arrangement of the stapling/stitching heads 40 on carrier disk 39 of rotary stitching/stapling apparatus 38 and well as the rotational speed of carrier disk 39 are respectively matched to the distances separating grippers 34 and support elements 34, together with their corresponding conveyor speeds in the direction of conveyance F.
If benders 42 are not integrated into support elements 34, then benders 42 are led separately to the apex of each printed product 16 to ensure closure of the staples and, if necessary, are guided with these printed products over a suitable section of the movement path of printed products 16 so that a high quality of stapling is achieved.
With the actual stapling procedure, i.e., the insertion of the staples for each of printed products 16 by stapling heads 40, and the subsequent bending of the wire ends to close the staples, it is possible to keep gripper 14 closed without obstructing the insertion and closure of the staples; gripper 14 remains closed but effectively is open to insertion and closure of the staples. The closure of grippers 14 is advantageous if the stapling for example is effected after enclosures have already been introduced into printed products 16. Other details about the process of insertion is described further below.
A further embodiment of device 10 constructed according to the principles of the invention is shown by
Support elements 34 may be designed in the form of known saddles, or rests, but may also be designed as benders (cf.
If the stapling procedure is not carried out, then it is possible to remove stapling apparatus 34 as well as opening device 22 and wheel-like arrangement 44 out of the transport path of transporter 12, as this is schematically represented in
Further embodiments of device 10 constructed according to the principles of the invention, or of the method practiced according to the principles of the invention are represented in schematic illustrations provided by
After completion of the process step performed by stapling apparatus 38, grippers 14 of the same transporter 12 are again led to merge together with the now stapled, printed products 16A riding on support elements 34. Grippers 14 of the same transporter 12 grasp the now stapled printed products 16A temporarily supported by support elements 34 and lead stapled, printed products 16A farther along conveyor direction F. At the same it is possible, depending upon the respective conditions, for gripper 14 of transporter 12 which has deposited a printed product 16A onto a support element 34, to again grip this printed product 16A after stapling station 38, or however for this gripper 14 to grip another printed product 16B. The logical allocation of grippers 14 of the transporter 12 to printed products 16A coming out of connecting device 36's workstation, and in these examples, support elements 34 of revolver 32 and wheel-like arrangement 44 are regulated by a control unit (not shown) for device 10, in order to maintain alignment, mesh, speed and synchronization between the several constituent stages according to the practice of the invention.
The embodiment of device 10 shown in
A further embodiment of device 10 constructed according to the principles of the invention is shown in
One embodiment is represented in
In the embodiment shown in
It is to be understood that with a somewhat less compact construction as is shown in
Support element 34 with bender 42 according to the state of the art is shown in
In order to increase the application possibilities of the device, stapling apparatus 38 and support elements 34 as are shown in
In the example shown in
If the stapling apparatus is constructed with a rotary stapler 38, then stapling heads 40 may be displaced for example, in a direction parallel to the longitudinal extension of support element 34 because carrier disks 39 are displaceable on the axis of rotation stapler 38 in the axial longitudinal direction. A common displacement with bender 42 allocated to stapling heads 40 of a carrier disk 39 is then effected by connection of bender 42 to carrier disk 39 for example via a connecting beam (not shown).
Benders 42 and stapling heads 40 or carrier disks 39 however, may also be moved independently of one another in a direction indicated by arrows 58 parallel to the longitudinal extension of the support element; stapling heads 40 or carrier disks 39 being borne on a first carrier (e.g. the arbor of the rotation stapler) and benders 42 being borne on a second carrier which is indicated in
It is to be understood that with such a design parallel to the longitudinal extension of support element 34, does not necessarily have to operate with two staplings being made along fold 18 of a printed products 16. One, two or more staplings may be carried out in the longitudinal extension of support element 34, depending of the requirement and the width of printed product 16. Accordingly one, two or more benders 42 with their lever means 68 and stapling heads 40 or carrier disks 39 with stapler heads are to be provided on the carriers.
It is clear that instead of stapling with staples, the present invention may also be practiced with other connecting methods and working steps on the transporter. Thus for example an adhesive connection of printed products 16 may be created. Device 10 according to the invention, then instead of a stapling apparatus 38 be equipped with a suitable device for glue binding, as are for example disclosed in EP 0662440 and EP 0628429. Formation of connections between the several leaves of printed products by way of ultrasound is also conceivable. Suitable is a device for ultrasonic connection as is disclosed such as shown in EP 390733 and EP 0390734, instead of applying stapling apparatus 38 or the device for adhesive binding support elements 34 of revolver 32 or of wheel-like arrangement 44 are then designed accordingly.
A further possible working step which may be carried out on transporter 12 is then the insertion. Thus, for example, stacks which have been formed as in EP 1254857 are inserted into printed products form below in that the transporter is led past a device as is described in
The device shown in
From the details set forth in the foregoing description, it is clear in which manner the above described features and examples of the device constructed according to the principles of the present invention and the method may be practices according to those principles may be combined with one another in a meaningful manner. Thus in device 10, according to the principles of the present invention, transporter 12 may be led over workstations which follow one another in a useful manner, wherein the workstations may be the end of an imbricate flow, connecting stations (stapling/stitching, gluing, ultrasound etc,) or the end of a collector or insert path, a device according to
Number | Date | Country | Kind |
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707/04 | Apr 2004 | CH | national |
This application is a continuation of co-pending patent application Ser. No. 11/111,948, filing date 22 Apr. 2005. This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from the filing of an application entitled PROCESSING ON A TRANSPORTER filed with the Swiss Federal Institute of Intellectual Property on 22 Apr. 2004, and there duly assigned Serial No. 707/04.
Number | Date | Country | |
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Parent | 11111948 | Apr 2005 | US |
Child | 12043618 | US |