EP0664226A1 - Method and device for adhesively binding the sheets of a multi-sheeted folded printed product - Google Patents

Abstract

The method is for use with magazines, newspapers, catalogues, etc. (12), these being held on a support (14) with the halves (12') spread apart. One or more tools (28) acting from the inside punch holes (42) at the seam (20). Before the return stroke, the tool is coated with glue and a force (40) is exerted in the transverse direction to widen the hole, the glue being transferred to the sheets at this point. The transverse force can be exerted from both sides and can intersect the fold line of the innermost sheet. At the seam, the article can be supported only at points clear of the hole to be formed.

Description

The present invention relates to a method and a device for the adhesive bonding of the sheets of a multi-leaf, folded printed product, such as a magazine, newspaper, brochure or the like.

A method and an apparatus of this kind is disclosed in the older CH patent application No. 01 754 / 93-7, which correspond to EP patent application No. 94 107 767.9 and US patent application No. 08 / 258,096. The printed product is placed astride a saddle-shaped pad. Above the support is a support beam with penetration tools in the form of driving or drilling needles. When creating the adhesive connection, a press device is first lowered onto the printed product in order to hold it in a defined manner on the support. By lowering the penetrating tools, passages are created through the fold of the printed product and adhesive applied to the outside of the penetrating tools is transferred over the entire length of the passages when the passages are formed or when the penetrating tools are removed, in order to produce punctual adhesive stitching. It is also mentioned that the penetrating tools could also be arranged in the support instead of in supporting beams, so that the driving-in movement would take place from bottom to top, ie from the inside of the printed product to the outside thereof. There is a risk that when the penetrating tool provided with adhesive on its surface is withdrawn, adhesive will adhere to the Is stripped outside of the outermost sheet and that glue is drawn into the inside of the innermost sheet. The latter can lead to the fact that the printed product, if it is not completely folded immediately after the adhesive has been introduced, can no longer be folded completely or that a complete opening is no longer possible because the halves of the innermost sheet are glued together adjacent to the fold. The pad can also be contaminated with adhesive if the printed product is moved along the pad after the adhesive has been introduced. Adhesive stripped on the outside of the printed product can contaminate other printed products or parts of the device. Further processing can be adversely affected, for example, adhesive that has not yet dried out when stacking printed products can cause them to stick together.

It is therefore an object of the present invention to provide a method and a device for the adhesive bonding of the sheets of a multi-sheet folded printed product, in which the adhesive is attached to the sheets by means of a penetrating tool with which a passage through the printed product is produced is only transmitted in one pass.

This object is achieved by a method according to claim 1 and by a device according to claim 9. The application of a lateral pressure from the outside onto the printed product has the result that the passage is spread in the direction transverse to the support. It takes on a funnel-like shape. The outer printed sheets thus do not rest on the surface of the penetrating tool when it is withdrawn, but are spaced apart from it. Glue can therefore not be stripped on the outside of the outermost sheet and the adhesive is transferred to the sheet in the interior of the passage. At the same time, the lateral pressure force ensures that the adhesive is completely stripped from the penetrating tool within the passage by means of the sheets and that no adhesive can get onto the inside of the innermost sheet. After releasing the lateral compressive force, the expansion closes due to the inherent elasticity of the printed product, which causes the adhesive to be reliably distributed to all printed sheets along the surface of the passage. All of the printed sheets are thus securely connected to one another.

A particularly good spread of the passage is achieved in the particularly preferred development of the method according to the invention.

In a likewise preferred embodiment of the method according to the invention, it is ensured in a simple manner that all adhesive is transferred to the printed sheets with high reliability.

In a further particularly preferred embodiment of the method according to the invention, a considerable spreading of the passage over its length, that is to say in particular also near its ends in the direction of the fold line, is achieved. In addition, the restoring force for closing the Continuity increased.

Considerable differences in the point of application of the lateral compressive force while the reliable transfer of the adhesive remains constant are permitted in the particularly preferred embodiment of the method according to the invention.

It when the line of action of the lateral pressure force intersects the side walls of the guide element is particularly advantageous, as stated in claim 6. This ensures a simple spreading of the passage to the innermost arch, so that this also comes into safe contact with adhesive. At the same time, it prevents the glue from getting onto the inside of the innermost sheet.

The lateral compressive force is advantageously released as soon as the penetrating tool has left the passage (claim 7). This means that even fast-curing adhesive can be used, since the passage is closed again very quickly.

The further development of the method according to claim 8, which is also preferred, ensures that the printed product rests securely on the support under all conditions. This prevents the mutual movement of printed sheets, which leads to high-quality printed products.

The method defined in claim 1 is carried out with the inventive device according to claim 9.

It is extremely simple in construction and reliable in operation.

With the particularly preferred embodiments of the device according to the invention according to claims 10 to 13, the particular advantages of the method according to claims 2, 3, 5 and 8 can be achieved.

Fig. 1

in perspektivischer Darstellung die wesentlichen Teile einer ersten Ausbildungsform der erfindungsgemässen Vorrichtung;

Fig. 2 bis 7

die in der Fig. 1 gezeigte Vorrichtung in einem Vertikalschnitt zu sechs verschiedenen Zeitpunkten eines Arbeitszyklus;

Fig. 8 bis 11

in gleicher Darstellung wie die Fig. 2 bis 7 eine zweite Ausbildungsform der erfindungsgemässen Vorrichtung mit einem Führungselement im Auflageorgan zu vier verschiedenen Zeitpunkten eines Arbeitszyklus; und

Fig. 12 bis 14

in Draufsicht die in den Fig. 8 bis 11 gezeigte Ausbildungsform der erfindungsgemässen Vorrichtung zu den gleichen Zeitpunkten eines Arbeitszyklus wie die Fig. 8 bis 10.

The present invention will now be explained in more detail with reference to two exemplary embodiments shown in the drawing. It shows purely schematically:

Fig. 1

the essential parts of a first embodiment of the device according to the invention in a perspective view;

2 to 7

the device shown in Figure 1 in a vertical section at six different times in a working cycle.

8 to 11

in the same representation as Figures 2 to 7, a second embodiment of the device according to the invention with a guide element in the support member at four different times in a working cycle; and

12 to 14

In plan view, the embodiment of the device according to the invention shown in FIGS. 8 to 11 at the same points in time of a working cycle as FIGS. 8 to 10.

The embodiment shown in FIGS. 1 to 7 of the device according to the invention for the adhesive bonding of the sheets 10 of a multi-leaf folded printed product 12, such as a magazine, newspaper, brochure etc., has an elongated saddle-shaped support member 14 with a support edge 16. The printed product 12 is placed astride the support member 14 in such a way that the innermost sheet 10 lies with its fold line 18 on the support edge 16. The fold of the printed product 12 is designated 20. The product halves 12 'of the folded printed product 12 are kept spread apart by means of the support element 14 which is approximately triangular in cross section. The inside and outside of the printed product 12 are indicated at 21 and 21 ', respectively.

A pressing and centering device 22 is arranged above the support member 14, of which only the two pressing elements 24 are shown. They have pressure cutouts 26 formed on their end face facing the support member 14 in accordance with the cross section of the support member 14. The pressing elements 24 can be lowered in the direction of the double arrow A for pressing the printed product 12 against the support member 14 in the direction against the latter and can be raised for releasing the printed product 12.

A sword-like penetration tool 28, as indicated by the double arrow B, can be moved from a rest position 30 in the support member 14 along a rectilinear movement path 32 to a penetration position 30 'and back again. The longitudinal extension of the penetration tool 28 runs in the direction of the movement path 32 and this runs at least approximately in the longitudinal center plane 14 'of the support member 14 and at right angles to it. Seen in the longitudinal direction of the support member 14, the penetrating tool 28 pierces the fold 20 of the printed product 12 from the inside 21 between the two pressing elements 24 when moving from the raw position 30 to the penetrating position 30 ', which counteracts the effect of the penetrating tool 28 on the printed product 12 Hold the support member 14 in contact. As can be seen in particular from FIGS. 2 to 7, the support member 14 has a passage opening 34 which is penetrated by the penetrating tool 28.

As can be seen in particular from FIG. 1, the support member 14 has a support edge recess 36, which extends symmetrically to the movement path 32, seen in the longitudinal direction of the support member 14, outside of the pressing elements 24. However, it should be noted that the printed product 12 lies on the support member 14 outside of both ends of the support edge recess 36.

1, 38 denotes a tongue-like pressure element which can be moved from a waiting position remote from the support member 14 in the direction of the double arrows C and D into a pressing position, in which the pressure element 38 is shown. The pressure element 38 acts from the outside on the printed product 12, a lateral pressure force 40, the line of action 40 'of which roughly intersects the fold line 18 of the innermost sheet 10 and thus the support edge 16, which is extended via the support edge recess 36, and the path of movement 32 of the penetrating tool 28. The Lateral compressive force 40 presses the product half 12 ′ facing the pressing element 24 in the direction against the support edge recess 36, which leads to the passage 42 created by the penetrating tool 28 being widened or spread out like a funnel. Seen in the longitudinal direction of the support member 14, the pressure element 38 acts on the printed product 12 preferably in a length that is greater than the width of the blade-like penetrating tool 28 in this direction.

The pressure force means 44 preferably have two pressure elements 38, as is indicated in FIGS. 5 to 7 with the arrows designated accordingly. The two pressure elements 38, which are placed in the pressing position, exert lateral pressure forces 40 on the two product halves 12 ', which leads to the passage 42 being spread out in a funnel shape symmetrically to the longitudinal center plane 14' in the upward direction (FIGS. 5 and 6).

For the sake of completeness, it should be mentioned that the pressure elements 38 can be moved from the waiting position into the pressing position and back again by means of known drive means, for example cylinder piston units. In order to be able to process printed products 12 of different thicknesses without adjusting the device, both the pressure elements 38 and the pressure elements 24 are spring-supported.

As is indicated schematically in FIG. 5, an adhesive application device 46 is further arranged above the support member 14. By means of this, the penetrating tool 28 located in penetrating position 30 'is applied with adhesive 48.

The support member 14 is preferably used as a collecting section, on which folded sheets 10 are placed astride one another. The printed product 12 thus formed then reaches a gluing station by moving along the support member 14 and / or the support member 14 with the printed product 12 arranged thereon in the direction transverse to the longitudinal extent of the support member 14. The pressing elements 24 are in their upper end position and the penetrating tool 28 is in the rest position 30, as is indicated in FIG. 2. By lowering the pressing elements 24, the printed product 12 is pressed in the direction against the support member 14 and centered. At the same time, the penetrating tool 28 is set in the direction of arrow B towards the penetrating position 30 'towards the top (FIG. 3). In the course of this movement, the penetrating tool 28 pierces the printed product 12 in the area of its fold 20 from the inside 21 and creates the passage 42, as shown in FIG. 4. As can be seen from FIG. 5, the adhesive application device 46 applies adhesive 48 to the surface of the penetrating tool 28 in the penetrating position 30 ', in the present case a drop of adhesive on one flat side of the penetrating tool 28 in the region of the tapered end. At the same time, the pressure elements 38 are moved from the waiting position into the pressing position, as a result of which they exert the lateral pressure force 40 on the printed product 12 in order to expand the passage 42. When the penetrating tool is withdrawn into the rest position 30 (FIG. 6) it now arrives the adhesive 48 in the funnel-like passageway 42 is transferred there to the sheet 10 and stripped from the latter by the penetrating tool 28. The cutting edge of the innermost sheet 10 forms a scraping edge which is pressed against the penetrating tool 28 by the lateral compressive force 40. Finally, as indicated by arrows A and D in FIG. 7, the pressing elements 24 are lifted off the printed product 12 and the printing elements 38 are returned to the waiting position. As a result of the spread support of the printed product 12 on the support member 14 and the inherent elasticity of the printed product 12, the passage 42 closes, as a result of which the adhesive 48 is distributed along the entire surface of the passage 42 to the sheets 10, which results in a reliable, clean adhesive stitching.

8 to 14 show a further embodiment of the device according to the invention, which is similar to the embodiment shown and described above. The same reference numerals are used for the same parts as in FIGS. 1 to 7; with regard to their structure and mode of operation, reference is made to the description above.

The elongated saddle-shaped support member 14 also has a support edge recess 36. The passage opening 34 opens into this and now has a rectangular cross section and, viewed in the longitudinal direction of the support member 14, extends approximately over the entire length of the support edge recess 36. A sleeve-like guide element 50 is arranged in the passage opening 34, the end walls 52 of which are connected to one another via side walls 54 are in the basic position substantially parallel to the longitudinal center plane 14 '. The guide element 50 projects into the support edge recess 36, the upper edge 56 of the end and side walls 52, 54 lying in a surface which corresponds to the surface of the support member 14 which is intended to be extended beyond the support edge recess 36, as is shown in particular in FIGS. 8 and 11 can be seen. The side walls 54 of the guide element 50 are elastically deformable.

8 and 12 correspond to the time of a work cycle as shown in FIG. 4. The pressing element 24 was lowered in the direction of arrow A onto the printed product 12 in order to hold it against the support member 14. The penetrating tool 28 was moved from its rest position 30 in the support member 14 in the direction of arrow B through the guide element 50 into the penetrating position 30 ', piercing the printed product 12 in the region of the fold 20 from the inside 21 and producing a passage 42 . The adhesive application device 46 is used to apply adhesive 48 to the surface of the penetrating tool 28. Now the pressure elements 38 are moved from their waiting position shown in FIG. 8 in the direction of the arrows D to the pressing position, as shown in FIG. 9. There they exert a lateral compressive force 40 on the printed product 12, the line of action 40 'of which intersects the side walls 54 in the region of the support edge recess 36. As can be seen in particular from FIG. 13, the pressure elements 38 are seen in the longitudinal direction of the support member 14, arranged in the penetrating tool 28, which leads to the fact that under the lateral pressure force 40 the side walls 54 are bent inwards and pressed against the penetrating tool 28. The penetration tool 28 is now retracted in the direction of arrow B into the rest position 30 shown in FIG. 10. The adhesive 48 previously applied to the penetrating tool 28 is transferred to the sheets 10 in the passage 42. The lateral compressive force 40 exerted by the pressure elements 38 also leads to a funnel-like spreading of the passage 42 in this embodiment, the position of the cutting edge formed by the innermost or innermost sheet 10 now being predetermined by the edge 56, as is shown in FIGS. 9 and 10 can be seen. Furthermore, the side walls 54 of the guide element 50 are brought into abutment by the lateral pressure force 40 as soon as the penetrating tool 28 is retracted into the passage opening 34, see FIGS. 10 and 14. This also closes the passage 42 in the area of the innermost arc 10. Now, the pressure elements 38, as indicated by the arrows D in FIG. 11, are brought back into the waiting position, which leads to the passage 42 closing. This is due to the inherent elasticity of the printed product 12, as well as under the restoring force of the elastically deformable side walls 54. When the passage 42 is closed, the adhesive 48 is distributed to the sheets 10 along the entire surface of the passage 42, so that the now slit-shaped passage 42 is completely included Adhesive 48 is filled, which leads to reliable clean adhesive stitching. After the pressing elements 24 have been lifted off in the direction of arrow A, the stapled printed product 12 is now ready for further processing.

In the exemplary embodiments shown, this shows lean sword-like penetrating tool 28 has an approximately rectangular cross section. It is tapered and has razor-sharp edges in the area of the taper to form a blade. It is also conceivable to provide an oval cross section and to make exceptions such as grooves, grooves or the like for the adhesive on the penetrating tool 28. These penetrating tools form a gap-like passage without removing paper.

It is also conceivable to apply the adhesive to both sides of the penetrating tool.

Cold and hot glue can be used. An adhesive can be used which flows into the gaps between the floor in order to produce a particularly good tack.

It is also conceivable to process the printed products in a lying position. The support member keeps the product halves spread.

The pressing and centering device 22 and the pressure force means 44 can be arranged on a common holder, which can be raised and lowered in the direction of arrow A. The pressing elements 24 also ensure that the pressing and centering device 22 and the pressure force means 44 are centered with respect to the support member 14.

The penetration tool can be driven in various ways, for example by means of cylinder-piston units of a link control, etc. The same also applies to the pressing and centering device 22 and the pressure force means 44.

For the sake of completeness, it should be mentioned that the printed products 12 in the region of the support edge recess 36, i.e. are not supported or are elastically yieldable in a section of an edge region along the fold 20. The product halves 12 'are then bent toward the inside in this area and additionally compressed by the lateral compressive force 40. However, it is also conceivable to dispense with a support edge receptacle 36 and to support the printed product 12 along the entire fold line 18 of the innermost sheet 10. In this case, too, the passage 42 is widened by the lateral compressive force 40, since folded multi-sheet printed products 12, in particular in the area of the fold 20 and in an adjoining edge area, split between the sheets 10 due to the inherent elasticity and thus have a greater thickness than in the area the edge area removed from the fold 20.

Claims (13)

Method for the adhesive bonding of the sheets of a multi-leaf, folded printed product, such as a magazine, newspaper, brochure or the like, in which the printed product (12) arranged on a support member (14) keeping the two product halves (12 ') spread apart from its inside (21) forth by means of a penetrating tool (28) to form a passage (42) in the region of the fold (20), and on the printed product (12) when the penetrating tool (28) now provided with adhesive (48) on its surface is withdrawn from the Outside (21 ') a lateral pressure force (40) is exerted in order to widen the passage (42) and to transfer the adhesive (48) to the sheets (10) in the passage (42). A method according to claim 1, characterized in that a lateral compressive force (40) is exerted on the printed product (12) from both sides. Method according to claim 1 or 2, characterized in that the fold line (18) of the innermost sheet (10) of the printed product (12) is at least approximately cut by the line of action (40 ') of the lateral pressure force (40). Method according to one of claims 1 to 3, characterized in that the printed product (12) in an edge region adjoining the fold (20), in Seen in the direction of its fold (20), it is supported exclusively by the support member (14) outside the passage (42) to be formed. Method according to claim 1 or 2, characterized in that the printed product (12) is supported by means of a guide element (50) with elastically deformable side walls (54) which is penetrated by the penetrating tool (28) and arranged on the support member (14), and by the lateral compressive force (40) the printed product (12) against the side walls (54) and these are pressed into contact with the penetrating tool (28). A method according to claim 5, characterized in that the side walls (54) of the guide element (50) from the line of action (40 ') of the lateral pressure force (40) are cut. Method according to one of claims 1 to 6, characterized in that the lateral compressive force (40) on the printed product (12) is released after the penetrating tool (28) has left the passage (42). Method according to one of claims 1 to 7, characterized in that the printed product (12) is held against the force of the penetrating tool (28) in contact with the support member (14). Device for gluing the sheets of a multi-leaf, folded printed product, such as a magazine, newspaper, brochure or the like, with a support member (14) for the printed product (12), which keeps the two product halves (12 ') spread, one transverse to the support member (14) from a rest position (30) to a penetration position (30') and back again movable penetration tool (28 ) for forming a passage (42) through the printed product (12) arranged on the support member (14) in the area of the fold (20) thereof from the support member (14), an adhesive application device (46) for applying adhesive (48) to it at least approximately in the penetrating position (30 ') and penetrating tool (28) and pressure force means (44) on the printed product (12) when retracting the penetrating tool (28), which is now provided with adhesive (48) on its surface, into the rest position (30) from the Outside (21 ') to exert a lateral compressive force (40) in order to widen the passage (42) and to transfer the adhesive (48) to the sheets (10) in the passage (42). Apparatus according to claim 9, characterized in that the pressure force means (44) have pressure elements (38) which can be moved from a waiting position remote from the support member (14) in the direction (D) transverse to the support member (14) into a pressing position and back again . Apparatus according to claim 9 or 10, characterized in that the support member (14) has a recess (36) and the line of action (40 ') of the pressure force means (44) the movement path (32) of the penetrating tool (28) and at least approximately the straight line Extension of the support edge (16) of the support member (14) in the area of the recess (36) cuts. Apparatus according to claim 9 or 10, characterized in that the support member (14) has a recess (36) in which a guide element (50) with elastically deformable side walls (54) for supporting the printed product (12) is arranged, and the line of action (40 ') of the pressure force means (44) cuts the side walls (54) in order to press the printed product (12) against the side walls (54) and press them against the penetrating tool (28). Device according to one of claims 9 to 12, characterized by centering and product pressing means (22) which hold the printed product (12) against the force of the penetrating tool (28) in contact with the support member (14).

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