ES2202921T3 - PROCEDURE FOR PUNCHING POSTERS AND DEVICE FOR IMPLEMENTATION. - Google Patents

Abstract

The invention concerns a method for cutting out streamers in strips, consisting in moving forward a streamer (2) step by step in a plane along a direction (F), cutting (5) out the streamer in parallel strips, transversely to the forward motion direction, unwinding an adhesive tape, and winding the cut out streamer strips, on one face of which the tape is glued. Said method further consists, after cutting out each strip, in transferring the latter in (7) at some distance from the streamer forward motion plane, and gluing the adhesive tape to the cut out strip, for said winding, said streamer forward motion by a step for cutting the next strip being carried out during said transfer, and optionally during said gluing.

Description

Poster die cutting procedure and devices for implantation.

The present invention relates to a procedure of punching posters in bands comprising:

- a step-by-step preview of a poster on a plane following one direction,

- a die cut of the poster in parallel bands, transversely to the direction of advancement,

- a winding of an adhesive tape,

- a roll up of the poster bands stamped on a face of which said tape adheres thus as a procedure for the implantation of a device of this kind.

A device that implants a gender device (see patent FR-B2631577).

This device is designed to punch in Poster bands for advertising panels in rotating prisms around vertical axes that allow to hold 3 posters on The same panel. This device comprises advance means step by passage of the poster to the edge of which a tape is made to adhere adhesive The edge of the poster is then die cut. After the die cut, the die cut band, against gluing a tape, is you can transfer right away laterally and rolled over a coil.

A similar device is also described in WO-A-91/13424.

Such a device is a first attempt to prepare bands of posters to glue on Prisms of advertising panels. Always present the inconvenience of being relatively slow. Hopefully a die cut band, provided with your adhesive tape, be ready to be able to Be separated and move the poster forward a new step.

In addition, the adhesive tape must, to be applied on the poster, be extended between two distant rollers in more of a length of the poster, that is ± 3m. This involves problems due to the fact that, as a consequence of the temperature, moisture or static electricity problems, tape adhesive has a tendency to bend in the cross section. TO Despite the heating of the adhesive tape, it is not maintained stable.

The present invention aims to improve the device and procedure as described in beginning, particularly increasing its cadence and therefore its performance, performing simultaneous operations.

To solve this problem, it is expected, according with the invention, a poster die cutting process such as indicated at the beginning, including:

- after each die cut of a band, a transfer of this at a distance from the plane of advance of the poster,

- an adhesion between the adhesive tape and the die-cut band for the purpose of said winding and

- said one-step poster advance for punch the next band taking place during the transfer of said band that comes from being punched out and eventually during the adhesion of the above.

This procedure also allows an advance of the sign to be punched when the die cut band is not still totally out of the mechanism in which the posters are enter and die cut.

According to an embodiment of the invention, the transfer comprises a descent of the band die cut in a plane parallel to the advance plane of the poster and a displacement of the band thus descended transversely to The direction of advance of the poster. The die cut band is lowered in that way a certain distance below the plane of advance of the poster, freeing up the space necessary for the advancement of a new band to be punched out.

In accordance with an advantageous embodiment of the invention, the adhesion between the unwound adhesive tape and the punched band takes place during the movement transversal to the direction of advance of the poster. Here, the adhesion it is done laterally, next to the frame that holds the means of advance of the poster and the transfer of the die cut band that way particularly quickly.

Other embodiments of the procedure according to the invention are indicated in the claims attached.

It is also planned, in accordance with the invention, a poster die cutting device, for the implantation of a method according to the invention, understanding,

- step-by-step means of advancing a poster in a plane following one direction,

- banding means of the poster in bands parallel, transversely to the direction of advancement,

- means of unwinding a tape adherent,

- means of winding the bands of posters punched on a face in which they adhere to said headband,

- means of transfer of each band die cut a distance from the advance plane of the poster and

- means of adhesion to make adhere the adhesive tape and the die-cut band, transferred, facing said rolled up, the means of advancing the poster by advancing this one a step to punch a band while the means of transfer transfer a previously stamped band and eventually while the means of adhesion do adhere the Adhesive tape and this previously stamped band.

Other embodiments of the device according to the invention are indicated in the claims attached.

Other details and particularities of the invention will result from the description of embodiments not limiting the invention, provided hereinafter with Reference to the attached drawings.

Figures 1 and 2 represent a side view of a device according to the invention in two positions successive

Figure 3 represents a sectional view following line III-III of figure 1, in a Intermediate position.

Figure 4 represents a view of the means of adhesion and winding of a variant embodiment of the device according to the invention.

On the different figures, the elements identical or similar are indicated with the same references.

The installation represented in figures 1 to 3 it involves means of step-by-step advancement of a poster in a plane, in the direction of the arrow F. In the illustrated embodiment these means involve lower conveyor belts 1 over the upper branches of which the poster sections are placed 2, the image up and join in the manner known by the operator. Conveyor belts can be advantageously contemplated upper 3 that slide on a support table 4 the section of poster 2 to be punched. The support table 4 it is held in a fixed manner on the frame 8. In the leading edge of the support table, the poster section is finds at the level of a blade 5, which in the illustrated example, It is schematically represented by a simple vertical line. This blade 5 can be of any form of cut suitable for punch the sheets of paper, for example, a sheet or wheel of horizontally offset die cut across the poster or even a guillotine system that passes vertically through the poster.

In a lower plane than the table plane support 4 is arranged a reception table 6 whose upper wall 7 is parallel to the poster. As it turns out from figure 3, this table it is a box that has an internal cavity 10 that is in communication through a conduit 9 with a vacuum source not represented that preferably works permanently. Wall 7 is perforated, at least on a part of its surface, and therefore allows an aspiration of the objects deposited on this part that presents perforations.

A feed coil 11 on a tape adhesive 12 is disposed on one side of the die cutting device so that it unwinds the tape transversely to the direction F of advance of the poster. This tape can be formed of a support adhesive of any appropriate material, for example paper, a synthetic material, such as polypropylene, chloride polyvinyl, polyester, etc., and of an adhesive material applied on this support, before or at the time of the passage of the tape inside the device according to the invention. This tape is preferably a double-sided adhesive tape on which one side It is protected by a removable lining band. Tape 12 unwinds from the coil 11 towards the upper wall 7 of the reception table 6 by means of a set of tension rollers 13, 13 'so that its face provided with a covering band is arranged down. The tape is applied perfectly flat against the wall 7 by the permanent aspiration created by the provision of the reception table 6 and presents its adhesive face up, not provided with a coating band.

Under the reception table 6, you can observe, in the exemplary embodiment illustrated in figure 1, a guide element 14. This guide element 14 is supported on a square 15 attached to a piston rod 16 of a cylinder hydraulic or pneumatic 17. Cylinder 17 is supported on the frame 8 by support blocks 18 and 19 among which is also arranged a displacement rod 20. The free end of the piston rod 16 is equipped with an eccentric ring 21 capable of moving axially over the sliding rod 20, preventing the rotation of the piston rod 16 around its axis and thus maintaining the horizontal wing of the square 15 in its flat. On the side facing the blade, the guide element 14 is slightly beveled to receive the band that is going to die cut 22, which comes from leaving the support table 4 and which finds therefore cantilever. As the band advances that it is going to die cut it straightens in a plane substantially horizontal.

The band to be punched is then below a vacuum box 23 that has a cavity 24 in communication, through conduit 25, with a vacuum source not represented. The bottom wall 26 of this box is perforated. When vacuum is created inside the cavity 24, the band die cut 22 can be sucked against the wall 26.

The box 23 is supported on a fixed support 27 represented schematically by means of for example a lever 28 represented by dashed lines. By means of a command appropriate, not shown, lever 28 can be raised or lower and rotate the vacuum box between a position high represented in figure 1 and a low position represented in Figure 2. In Figure 3, the box 23 is in a position intermediate.

The die cutting device, as illustrated In Figures 1 to 3, it works as follows.

Sections of poster 2 rejoin between they on the conveyor belts 1 so that they form a full poster This is advanced following the direction of the arrow F with the leading edge corresponding to the side of the height of the poster. The height of a poster can be for example around 3, but this dimension is not critical to the invention. An engine of drag not shown drag step-by-step bands 1 and 3 of synchronized way. The poster formed 2 also advances step by step, held first on band 1 and then on the table of support 4. Each step has a value equivalent to the length of the fins that form the poster support prisms provided for the poster that is going to die. The step can be for example of approximately 130 mm

Since the poster advances one step, when its leading edge is located on the leading edge of the table support 4, the band to be punched 22 is no longer supported and It is cantilevered, having the tendency to hang slightly. As the step passes, the leading edge of the band that it is going to die 22 finds the bevel of the guide element 14 which is in an advanced position by the cylinder 17. The edge forward is thus reoriented so that the band that is going to die 22 is in the vicinity of the bottom wall perforated 26 of the vacuum box 23 which extends over the entire length of the band 22. This is thus sucked up at the same time that it is punched by the blade 5. The band die cut remains suspended by the aspiration of the box 23.

The cylinder 17 then drives the retraction of the piston rod 16 and therefore guide element 14, which allows an unobstructed descent of the vacuum box 23 under the action of drive means not shown acting on the lever 28. At the end of the descent of the box 23, the different device elements will be in the position represented in figure 2. In this position, the bottom wall 26 of the box empty 23 is applied on the reception table 6 and the band has been thereby transferred a distance from the advance plane of the poster.

As shown in figure 3, the tape double-sided adhesive, unwinds transversely on the table Reception 6 with an adhesive side facing up and a face adhesive protected by a downward facing band. The tape is applied very flat on the face 7 of the table 6, by the permanent aspiration created through the perforations of this face.

When the vacuum box 23 is in the position low, therefore apply evenly, on a tape completely flat adhesive, the band of the poster already stamped.

Drive means not shown then interrupt the operation of the vacuum source that is in communication with the cavity of the vacuum box 23. After that the vacuum box goes back to its high position, without the band of die-cut poster resting adhered on the adhesive tape. Simultaneously the guide element 14 is advanced by the cylinder 17.

As soon as these elements find their initial position, represented in figure 1, the poster can be advanced a new step. During this time, the adhesive tape provided with the die-cut band 31 is laterally transferred a distance at least greater than the length of the band die cut, to be wound in a coil 29, passing for example in the middle of a set of tension rollers 30, 30 '.

In this embodiment, the poster is already therefore, a next step may be advanced when the lateral displacement of the previously punched band is not still finished This results in an increase in the cadence of the device with respect to the prior art.

Figure 4 represents a variant of perfected embodiment of the die cutting device according with the invention, in a view similar to that of figure 3. The means of advancing the cartel, stamping it in bands and Die cut bands are identical to those represented in figures 1 to 3 and therefore do not have to be represented again in this figure 4, for reasons of ease of reading

Here, the reception table 32 can be a table of suction analogous to the reception table 6, in which the face upper 33 is parallel to the advance plane of the poster. About this upper face can slide the upper branch of a band perforated endless conveyor 34 that revolves around two Forwarding rollers 35 and 36. One of these two rollers is dragged to the turn by a motor not represented. Thanks to the perforations of the band 34 and the implantation under vacuum of the table 32, the band of die cut poster moves perfectly and at the same time as the conveyor belt

In the exemplary embodiment according to the Figure 4, the means for unwinding the adhesive tape 37 are formed by a feed coil 38 and a set of rollers of forwarding 39 to 41 that have the tape on the periphery of a adhesion roller 42.

The adhesion means comprise this roller of adhesion 42 and a pressing roller 43 applied on the roller 42. Between these two rollers each strip of punched paper 47 and the Adhesive tape 37 are arranged and glued to each other.

The winding means comprise a coil of reception 44 on which the adhesive tape provided with bands of punched posters, successive 48 as well as a set of Forwarding rollers 45 and 46.

This device illustrated in Figure 4 it works in the same way as the device illustrated in the Figure 3 with the important difference that there is no adherence between the tape and the die-cut band at the end of its descent on the plane of the reception table 32.

When the vacuum box 23 begins its rise towards its high position, the endless conveyor belt transfers transversely, in the direction of arrow f, the punched band. It is only during this lateral transfer when the band Die cut is arranged to adhere to the adhesive tape.

It turns out that the punching of the band of posters following may take place already during the adhesion stage of the preceding band and that the movement of the vacuum box 23 can be provide much faster, because this element no longer has the function to apply and glue the die cut band on a tape adhesive The risk of curvature of the adhesive tape in section transverse over the small distance between the return rollers 41 and the adhesion roller 42 is almost excluded.

It should be understood that the present invention is not in any way limited to the modes and embodiments indicated here before and that many modifications can be made without departing from the scope of the appended claims.

You have to understand, for example, tapes adhesives in its broadest sense, being able to adhere not only with a binder, but also with anchoring means, for example Velcro type.

The drive and drive means and the engines are not represented because they are part of the knowledge of those skilled in the art. You can also imagine a synchronization of the different movements by a computer central.

You can also imagine, about the device illustrated in figure 4, that only the right part of the drawing of the Table 32 presents an aspiration. The endless conveyor belt 34 it can be suppressed and the adhesive tape coming from the coil 38 is You can feed the center or on the left side of table 32. Allowing this a partial adhesion of the die cut band, a drag it following the direction f by the adhesive tape and the application of this over the entire band during this drag.

Claims (14)

1. Poster punching procedure in bands comprising: - a step-by-step preview of a poster on a plane following one direction, - a die cut of the poster in parallel bands, transversely to the direction of advancement, - a winding of an adhesive tape and - a winding of the strips of punched posters on one side of which said tape adheres, characterized in that it further comprises: - after each die cut of a band, a transfer of this at a distance from the plane of advance of the poster, - an adhesion between the adhesive tape and the die-cut band for the purpose of said winding and - said one-step poster advance for punch the next band taking place during the transfer of said band and eventually during the adhesion of the same. 2. Method according to claim 1, characterized in that the transfer comprises a reduction of the die-cut band in a plane parallel to the plane of advance of the poster and a displacement of the band thus descended, transversely to the direction of advance of the poster. 3. Method according to claim 2 characterized in that the adhesion between the unwound adhesive tape and the die-cut band takes place during transverse displacement to the direction of advance of the poster. Method according to claim 2, characterized in that the adhesion between the unwound adhesive tape and the die-cut band takes place within said parallel plane in which the die-cut band is lowered before said transverse displacement. 5. The method according to claim 4, characterized in that the adhesion comprises an application of the die-cut web during the descent on the flat-fed adhesive tape in said parallel plane. Method according to any one of claims 1 to 5 characterized in that it comprises a maintenance of the band to be punched in the plane of advance of the poster before and during the die cutting. 7. Poster punching device, for implementation of the procedure according to any of the claims 1 to 6 comprising: - stepping means (1, 3) of a poster (2) on a map following one direction (F), - die cutting means (5) of the band sign parallel, transversely to the direction of advancement, - unwinding means (11, 38) of a belt adhesive (12, 37), - winding means (29, 44) of the bands of die-cut posters (31, 48) on one side of which said tape adheres, the device characterized in that it further comprises: - transfer means (23, 27, 28; 11, 29; 38, 42-44) of each band punched a distance of the poster advance plane, - adhesion means (6, 23; 42, 43) to make adhere the adhesive tape and the transferred die-cut band, with object of said winding and - the means of advance (1, 3) of the poster making advance this one step to punch a band while the means of transfer (11, 29; 38, 42-44) transfer a previously punched band and eventually while the means of adhesion (42, 43) make the adhesive tape and this band adhere previously die cut 8. Die-cutting device according to claim 7, characterized in that the transfer means comprise means for lowering (23, 27, 28) the die-cut strip in a plane parallel (7, 33) to the plane of advance of the poster (2) and displacement means (11, 29; 38, 42-44) capable of displacing the descended band, transversely to the direction of advance (F) of the poster. Device according to claim 8, characterized in that the lowering means comprise a vacuum box (23) capable of moving between a high position and a low position and which comprises a flat wall (26) located below the band that is it is going to punch (22), in a high position of the box and substantially in said parallel plane, in a low position, as well as actuation means (25, 27, 28) that drag the vacuum box in its displacement and that produce vacuum in a cavity (24) of the box where perforations provided in the flat wall (26) end in its high position and during its downward movement and interrupting this vacuum in the low position of the box and because the advancing means (1, 3 ) of the poster they advance one step, when the box (23) is in the high position. Device according to claims 8 and 9, characterized in that said transverse displacement means comprise at least one conveyor belt (47) having an upper branch arranged in said parallel plane (33) and of means for carrying said less a conveyor belt, which put it into operation when the vacuum box (23) has left its low position and stop it when the punched band has been moved a distance at least greater than its length. Device according to claims 8 to 10, characterized in that said adhesion means comprise two rotating rollers (42, 43) applied one over the other, in which one receives on its periphery the adhesive tape (37) unwound by means of unwind (38) and between which each die-cut band (47), guided by the transfer means, is applied on the adhesive tape (37). 12. Device according to claims 8 to 10 characterized in that the adhesion means comprise means for placing (6, 13 ', 30') of the unwound adhesive tape (12) in said plane parallel to the plane of advance of the poster and because the lowering means (23) apply the die-cut strip on the adhesive tape placed in this way. 13. Device according to claim 12 characterized in that said positioning means comprise a reception table (6) in the form of a vacuum box that is permanently under vacuum and which has a perforated upper wall (7) in said parallel plane, on which the adhesive tape that comes from the unwinding means (11) is sucked flat. 14. Device according to any of claims 9 to 13 characterized in that the means for advancing the poster comprise at least one conveyor belt (1) that supports the poster to be punched (2) in said advance plane and advances step by step towards the die cutting means (5), the band to be punched (22) is no longer supported by the conveyor belt during the advance step and because the device comprises a guide element (14) that guides the band to be punched, during its advance step, below the perforated wall (26) of the vacuum box (23) and that can be retracted at the end of the advance step to allow the vacuum box to move (23) between its high position and its low position and reciprocally.