EP1211210A2 - Device for perforating webs of material - Google Patents

Abstract

The perforating tool for single or multi-layer bands of material or copy produced from them has one half (16) with perforating teeth (15). This is separated by a gap from the second half (17) which has a cutting zone (19) with sections of cutting edge (21) alternating with groups of perforating teeth (22) which have a slanting tip.

Description

The invention relates to a device for perforating material webs can be made up of one or more layers and of which copies to be processed be separated.

WO 00/10899 relates to a method and a device for perforating Material webs. According to this method and device, copies are made the transverse or longitudinal folding separated from the leading end of a material web. The Material web can consist of one layer or of several web strands. Along the The web running direction of the material web are two consecutive cutting or perforating and cutting devices arranged. By means of one assigned to the first longitudinal fold Cutting unit, the material web strand is cut in this area. Another Perforating / cutting device perforates or cuts the material web strand in the area a cross fold to form material bridges. At least one of the Cutting tools or perforating tools can be adjusted relative to the material web strand.

FR 2 693 403 relates to a folded copy which is used for the production of brochures, Books or the like can be used, a tool for making perforations and a method of manufacturing the same. Using an appropriately configured Perforating knife can be cut in at least half of the copy produce, the incisions partially perpendicular to the extent of the fold back run. By means of the incisions in at least one half of the fold back, the thrust of the inner layers of the folded copy acting on the outer copy layers are absorbed so that no deformations in the outer layers of the specimen Fold back area can occur.

US 4,951,967 relates to a perforating knife for signatures and one made with it Signature. A signature, i.e. one copy consists of a number of individual layers of copies which are arranged along a fold line. Along the fold line a series of spaced perforations are provided across the width thereof. The Rows of spaced perforations are made using a perforating knife generated, which has a number of spaced-apart perforation sections. With Such a kind of folded copy will be when stacking a large number of copies Avoid bulges on the fold back.

US 5,524,930 relates to a perforating knife and a copy. A perforating knife comprises a one-piece sheet, which is very thin with respect to its length is. A cutting area is formed on a long side of the perforating knife; at the On the long side, it contains a combination of a series of straight lines spaced and angled sections. The angled sections are arranged so that they face the center of the perforating knife are and are formed only on one half of the perforating knife. According to one The variant is a longer cutting section in the middle of the perforating knife provided, on which there are three angled sections and connect a straight section. The angled sections are like this executed that they point in one direction, so that the resulting on the fold copy The fold line only creates incisions pointing in one direction. The incisions form easily displaceable sections, which in turn form the fold lines or fold back form on the copy that are smoothly folded without wrinkles or bulges exhibit. The angled cuts can be straight or curved, as long as they are pointing approximately to the center of the perforating knife and only on one side of the perforating knife.

Examples are produced on web-processing rotary printing presses that do more than 24 pages, e.g. 48-page, 64-page or 96-page copies or copies, which consist of printing material of heavy grammages wins the opportunity a shear stress compensation on the inner of the individual specimen layers with respect to the outer copy layers increasingly important to the copy quality at the Not to affect further processing.

The invention is based on the object, preferably on multilayered fold copies in the area of the fold back, relative movements of inner copy layers to outer copy layers permit. According to the invention, this object is achieved by the features of the patent claim 1 solved.

The advantages of the solution according to the invention can be seen above all in that the Folded spine of multilayered copies on one side with punctiform perforation openings can be provided so that air can escape, on the other hand, another half of the can be provided with incisions on the copy of the fold back to be trained, which is a relative movement of the individual layers of the multilayer fold copy to one another allowed. Thanks to the configuration of the individual perforating knife tongues that create the incisions as inclined surfaces, the incisions are made depending on the thickness of the perforating material web strand in material length dependent cutting length it is ensured that the cuts in 24-, 48-, 64- and even in 96-page copies are applied at an incision depth, which is a relative movement of the inner Layers of the multilayer fold copy relative to the outer layers of the fold copy allow. The perforating tool proposed according to the invention is on fastening devices perforated cylinders attached, making it easy after extended use can be replaced.

In a further embodiment of the idea on which the invention is based, there is no tools Gap arranged in the area of a first half of the perforating tool, which abuts a cutting tool in the second half of the perforating tool. Through the tool-free area of the perforating knife configured according to the invention a material bridge is created on multilayered specimens in the central area, which the fold copy, which preferably contains several layers, is stabilized.

In an advantageous embodiment of the perforating knife configuration according to the invention borders the cutting zone in the second half of the perforating knife on the one hand to the tool-free Gap in the first half of the perforating tool and on the other hand to a first Group of inclined perforation tongues in the second half of the configured according to the invention Piercing tool. This means that multilayered fold copies are printed on the back of the fold in addition to the material bridge formed by the tool-free gap, a longitudinal section introduced into the fold back, which in turn in the center area of the copy for balances emerging shear stresses. The preferably as perforating tongues trained perforating elements of the individual groups of perforating elements The second half of the perforating tool are around with respect to the perforating tool an angle between 20 ° and 40 °. The is particularly preferably Inclination angle of the individual perforation tongues of the groups of perforation elements 30 °.

The individual groups are inclined, preferably designed as perforating tongues Perforating elements are within the second half of the configured according to the invention Perforating tool applied in alternating order with respect to cutting sections, so that there is both a shear stress reduction in this half of the fold back allow incisions to be formed as well as trained parallel to the fold back Cuts can be applied.

The perforated tool configured in the second half of the perforating tool configured according to the invention In one embodiment, groups of perforating elements are inclined, the slant being symmetrical with respect to the planes of the perforating tool fails. In this embodiment variant of the perforating elements are both Front and rear edges deflected out of the plane of the cutting tool.

In further configuration options of the perforating knife proposed according to the invention can the individual perforation tongues within the second half of the perforation tool be so inclined that only the rear edge of the perforating tongues are issued from the level of the perforating tool. It is just as possible to have one To form the slanting of the perforation tongues within the groups of perforation elements in such a way that only their front edge issued from the plane of the perforating tool and the rear edge is essentially in the plane of the second half of the perforating tool lies. The fact that the individual perforation tongues of the groups of perforation elements within the second Half of the perforating tool configured according to the invention by an angle of between 20 ° and 40 °, but particularly preferably 30 ° from the plane of the perforating tool exhibited are.

The compensation of shear stresses within multilayered copies in their Incisions allowing the fold back region are preferred from inclined in Groups arranged perforating elements generated, which are designed as perforating tongues are. The individual perforation tongues of the groups on perforation elements are through longitudinal slots separated from each other so that each of the perforating tongues is allocated a free space is through which the when perforating or cutting multilayer material webs paper dust that is inevitably produced can be discharged free of deposits.

In a preferred embodiment, the individual perforating elements can also have their tips be provided with an inclined surface which ends in a perforating tongue tip. In the Incisions to be made in multi-layer material webs to compensate for shear stresses in one half of the fold back can be manufactured particularly precisely when First a selective contact between the perforating tongues making the incisions in the tip area of the perforation tongues when hitting the top of the multi-layer material web occurs. By the at an angle of inclination from the perforation tongue tip depending on the depth of penetration of the perforating tongue the incision length in the fold back area in the respective multi-layer material web of the multilayer fold copy can be set.

The inventive design of a perforating tool is shown in preferably recorded on perforating cylinders in a folder of web-processing rotary printing machines are arranged. It is irrelevant whether the web-processing rotary printing press is a commercial web rotary printing press or a newspaper press.

The invention is described in more detail below with reference to the drawing.

Fig. 1

den sich beim Falzen von Exemplaren einstellenden Seitenversatz an den offenen Enden des Exemplars,

Fig. 2

die Draufsicht auf ein zu falzendes Exemplar, an dessen einer Hälfte die erfindungsgemäß aufzubringenden Einschnitte ausgebildet sind,

Fig. 3

eine Draufsicht auf eine Ausführungsvariante des erfindungsgemäß vorgeschlagenen Perforierwerkzeuges,

Fig. 4

eine Gruppe schräggestellter Perforierelemente in vergrößerter Darstellung und

Fig. 5.1 - 5.4

weitere Ausführungsvarianten einer Hälfte des erfindungsgemäß vorgeschlagenen Perforiermessers.

It shows:

Fig. 1

the lateral offset that arises when folding copies, at the open ends of the copy,

Fig. 2

the top view of a copy to be folded, on one half of which the cuts to be made according to the invention are formed,

Fig. 3

2 shows a plan view of an embodiment variant of the perforating tool proposed according to the invention,

Fig. 4

a group of inclined perforating elements in an enlarged view and

Fig. 5.1 - 5.4

further design variants of one half of the perforating knife proposed according to the invention.

From the illustration according to FIG. 1, the one that arises when the copy is folded lateral offset of individual copy layers of a multi-layer copy on the open Fold copy page closer.

The copy 1 to be folded shown in FIG. 1 is aligned with respect to a reference line 2. The closed end 3 of the copy 1 to be folded lies at the reference line 2, of which only the outer copy position is shown in the representation 1. With reference numbers 4 is the inside of the closed end 3 of the copy to be folded 1 designed fold back. The outer layer of the copy 1 to be folded, i.e. the upper open side 6 is turned over with an outer radius of curvature 8 the lower open side 7 of the folder 1 with a smaller radius of curvature 9 is turned over. One stems from the different radii 8 and 9 on copy 1 Shift 10 at the open end 5 of the copy 1 ago, which is due to the shift the upper open side 6 is caused relative to the lower open side 7. This effect the clearer the more layers the copy to be processed contains and the higher the grammage of the printing material.

From the illustration according to FIG. 2, the top view of a copy to be folded is closer out on one half of the cuts to be made according to the invention to Shear stress compensation are designed.

The copy 1 to be folded is in its unfolded state as shown in FIG. 2 11, with the arrow 14 marking the direction in which the open End 5 of the copy 1 to be folded will set a displacement 10 originating from the shift from the upper open side 6 to the lower open side 7 of the multilayer Copy 1. While along the fold edge 12 from punctiform perforation openings perforation pattern 13 is formed, which has below the drawn in, region of the folded edge which indicates the directions of displacement arrow 14 12 a perforation pattern 13, which ends at an angle to the center of the specimen Incisions is marked. The individual incisions all come together the center of the unfolded copy 11 and allow shear stress compensation in the area of the folded edge 12 of the copy.

3 shows a plan view of a first embodiment variant of the perforating tool proposed according to the invention in the form of a perforating knife out closer.

The perforating tool 15 shown in FIG. 3 can be shown with a broken line Divide the imaginary center line into two halves 16 and 17 respectively.

The formation of the first half 16 of the perforating tool 15 is uniform Sequence, the fold back marked punctiform perforation teeth 28 in this area, arranged in continuous repetition 35 along the length of the first half 16 are. Those that act on the fold back of a multilayer copy at certain points Perforating teeth 28 make 1 openings in the fold back through which openings in the fold back trapped air, which bulges the back, can escape, so that at allows multilayer copies to be formed with an air-free fold back.

The continuous succession of perforating teeth 35 in the first half 16 of the perforating tool 15 is followed by a tool-free area 18. The tool-free area 18 enables the formation of a in the middle of a multilayer fold copy Material bridge. The material bridge, which varies according to the selected depth of the tool-free Gaps 18 on the first half 16 of the perforating tool 15, stabilized the fold back of the multi-ply copy in the area of the middle.

In the second half 17 of the perforating tool 15 proposed according to the invention a cutting zone 19 is formed. The cutting zone 19 immediately adjoins the tool-free gap 18 in the first half 16 of the perforating tool 15 and runs up to a first group of 22 inclined perforating elements. By means of the cutting zone 19 is adjacent to that created by the tool-free gap 18 in the multi-layer copy Material bridge creates a partial cut in the fold back.

A first group 22 adjoins the continuously extending cutting zone 19 slanted perforation elements. Behind the first group 22 inclined perforating elements, preferably as perforating tongues separated from one another by longitudinal slots are formed, a straight section 21 follows, which acts as a cutting knife is trained. Cutting knife areas 21 and groups 22 of inclined perforating elements are in the second half 17 of the perforating tool configured according to the invention 15 added in alternating order. The configured according to the invention Perforating knife extends over a width 38 which is preferably the maximum processable Material web format corresponds.

Above the side view of the perforating tool 15 configured according to the invention is a top view of both the straight cutting edges 21 and in an alternating order between these arranged groups 22 inclined Perforating elements, which are preferably designed as perforating tongues. From the dashed shown center line to the first group 22 extends an elongated Cutting zone 19. The height of the perforating tool 15 as shown Fig. 3 is identified by reference numeral 20, wherein the perforating tool 15 on Shell surfaces of perforating cylinders, for example, in material webs Folders can be added interchangeably. So perforating tools, which are subject to high wear and tear, can be replaced very quickly and easily with new ones that the perforations on multilayer material webs in the required quality and accuracy can be trained.

4 shows a group of inclined perforating elements out closer.

The top view of a group 22 of perforating elements shown on an enlarged scale in FIG. 4 - preferably perforating tongues - comprises a first perforating tongue 22.1, a second perforating tongue 22.2 and a third perforating tongue 22.3. The individual perforation tongues are separated from each other by longitudinal slots 25, which are derived from the can serve during the perforation of paper dust, so that it is free of deposits can be derived from the perforation area. At the three perforation tongues 22.1, 22.2, 22.3 also closes a straight line separated by a longitudinal slot 25 Section 21, the upper edge of which is formed as a straight cutting edge is. In addition to the variant of a group 22 of inclined ones shown in FIG. 4 Perforating elements with three perforating tongues can be within a group 22 of Perforating tongues on the second half 17 of the perforating tool 15 also per group 22 only two or more, i.e. four or five individual ones from each other through longitudinal slots 25 separate perforation tongues.

The perforating tongues run out in a tip 26, which is part of an inclined surface 23 is. When contacting the multi-layer material web to be perforated, first hit the perforating tongue tips 26 acting selectively on the uppermost layer of the material web, so that towards the center of the copy to be folded or perforated incisions made by means of the perforation tongues in length depending on the Thickness, i.e. the number of layers of the individual material webs fail. The thicker the too folding or to be perforated material webs, i.e. the more layers that were on the fold back is to be perforated, the longer the incisions according to the Form perforation pattern 13 in one half of the fold back on the copy. The incision length depends on the immersion depth of the inclined surfaces 23 of the perforating tongues 22.1, 22.2, 22.3 of the perforating tool configured according to the invention in the second half 17 15 together in the multi-layer material web.

Individual design variants are shown in the representations according to FIGS. 5.1 to 5.4 the second half 17 of the perforating tool 15 configured according to the invention out.

5.1 shows that in the second half 17 of the perforating tool 15 individual groups 22 inclined perforating tongues are formed. In this embodiment variant, the groups comprise 22 inclined perforating elements only two perforating tongues 22.1 and 22.2. The individual perforation tongues 22.1 and 22.2 are separated from each other by longitudinal slots 25 and about an axis of rotation 31, which with the Reference line 37 on the perforating tool 15 coincides, evenly, i.e. at the front edge 22.5 and at the rear edge 22.4 by the inclination angle 24 from the plane of the perforating tool 15 issued. The skew angle 24 around which the perforating tongues issued from the level of the perforating tool 15 is preferably in the range between 20 ° and 40 °. The inclination angle 24 is particularly preferably 30 °, the inclined position with the front edge of the perforating tongues 22.1 and 22.2 towards the center of the copy 1 to be folded is selected.

As in the variant according to 5.1 both the front edge 22.5 and the rear edge 22.4 symmetrically to the axis of rotation 31 of each perforating tongue 22.1 or 22.2 the level of the perforating tool 15 are issued, one also speaks of symmetrical Exhibition 32. Between the two perforation tongues in this variant 22.1 or 22.2 comprehensive groups 22 of inclined perforating elements individual cutting sections lie parallel to the reference line 37 on the perforating tool 15 21. The groups 22 of inclined perforating tongues 22.1 and 22.2 and the straight cutting sections 21 are in the second half 17 of the perforating tool 15 applied in alternating order.

An alternative design option results from the embodiment variant according to FIG. 5.2 the second half 17 of the perforating tool 15. In this variant are the adjoining the extended cutting section 19 Groups 22 inclined perforating tongues 22.1, 22.2 with their rear edge 22.4 issued from the plane of the perforating tool 15, while the leading edge 22.5 is straight is still in the plane of the perforating tool. According to this exhibition scheme is also from an off-center offset 33 of the preferably designed as perforating tongues, inclined perforating tongue 22.1 or 22.2 from the plane of the perforating tool 15 spoken. Reference number 24 denotes the exhibition angle, which in particularly preferred embodiment of a perforating tool is 30 °. Between individual perforating tongues 22.1 separated from one another by slot-shaped openings 25 or 22.2 are analogous to the representation according to FIG. 5.1, individual straight lines Incisions 21, the perforated tongues 22.1, 22.2 inclined by the groups 22 as well by slit-shaped perpendicular to the plane of the drawing as shown in Fig. 5.2 extending openings 25 are separated. Also the group 22 of inclined perforation tongues according to the embodiment variant in FIG. 5.2 only comprise two perforating tongues. In addition, it is of course also possible to separate the individual groups 22 from inclined perforating elements with three or five or any other number of To equip perforation tongues. The leading edges lie according to this display pattern 33 22.5 all individual perforation tongues 22.1 and 22.2 all still in the plane of the Perforating tool 15.

5.3 shows a further embodiment variant of the arrangement of groups 22 of inclined perforating elements within the second half 17 of a perforating tool 15 configured according to the invention.

At the elongated cutting sections 19 groups 22 close inclined Perforating elements that alternate from straight ones cutting sections 21 lying in the plane of the perforating tool 15 are interrupted are. The reference line 37 with respect to which the perforating tongues are inclined 24 are issued, is parallel to the perforating tool 15. In the variant of the perforating tool as shown in Fig. 5.3 are Trailing edges 22.4 of the individual perforating tongues separated from one another by longitudinal slots 25 in the plane of the perforating tool 15, while the front edge 22.5 in the Top view are deflected downward as shown in Fig. 5.3. This too The variant shows an off-center inclined position 34 of the individual perforating tongues of the groups 22 inclined perforating elements. Through this arrangement pattern of straight sections 21 and the individual perforating tongues 22.1 and 22.2 of groups 22 slanted perforating elements are formed between the rear edges 22.4 of the individual perforating tongues 22.1, 22.2 longer free spaces 36, which later in the fold back of the preferably multilayered fold copy material bridges.

5.4 shows a further possible embodiment of the second one Half 17 of a perforating tool 15 out. This variant is this characterized that in the second half 17 of the perforating tool according to herringbone a variety of 22.1, 22.2 to 22.n individual, inclined perforating tongues are trained. The individual perforated tongues arranged in a symmetrical exhibition 32 are interrupted by free spaces 36. The perforation tongues 22.1 to 22.n are each about its axis 31 at both the front and rear edges with respect to the reference line 37 of the perforating tool 15 deflected. Here, too, there is a continuous Repetition of perforating tools over half 17 of the perforating knife. All Perforating tongues arranged in a continuous repetition are at an angle 24 deflected from the perforating tool plane with respect to the reference line 37. The deflection angle is preferably in the range between 20 ° and 40 °, with particular preference a deflection angle of 30 ° is selected.

By means of the design variants of the perforating tool proposed according to the invention 3, 5.1, 5.2, 5.3 and 5.4 can be on one half of a Falzrükkens depending on a fold copy made up of several layers on strength, i.e. bring in the number of layers of the specimen, which is a shear stress compensation allow the inner copy layers relative to the outer copy layers, so that the fold back 4 can be made flatter overall and the side Offset 10 of the individual layers to one another an open end of the multilayer fold copy 1 can be significantly reduced.

LIST OF REFERENCE NUMBERS

1

copy

2

reference line

3

closed end

4

folding spine

5

open end

6

upper open side

7

lower open side

8th

outer curvature

9

inner curvature

10

shift

11

unfolded copy area

12

folding edge

13

perforation

14

shift direction

15

perforating

16

first half

17

second half

18

tool-free gap

19

cutting zone

20

height extension

21

cutting section

22

Group of perforating elements

22.1

first perforating tongue

22.2

second perforating tongue

22.3

third perforating tongue

22.4

trailing edge

22.5

leading edge

23

inclined surface

24

Skew angle

25

slit-shaped opening

26

Perforierzungenspitze

27

-

28

continuous perforating teeth

29

center line

30

free space

31

axis of rotation

32

symmetrical exhibition

33

external exhibition

34

outer center exhibition leading edge

35

continuous repetition

36

free space

37

reference line

38

Wide perforating tool

Claims (14)

Perforating tool for perforating single or multi-layer material webs or copies separated therefrom (1), the perforating tool comprising a first half (16) and a second half (17), with the following features: 1.1 a number of perforating teeth (15) accommodated in the first half (16) of the perforating tool 1.2 a tool-free gap (18) formed in the first half (16) 1.3 a in the second half (17) arranged cutting zone (19) and 1.4 at least one group (22), formed in alternating order in the second half (17), of perforating elements (22.1, 22.2, 22.3) inclined with respect to the perforating tool (15). Perforating tool according to claim 1, characterized in that the tool-free gap (18) of the first half (16) adjoins the cutting zone (19) of the second half (17). Perforating tool according to claim 1, characterized in that the cutting zone (19) in the second half (17) adjoins the tool-free gap (18) on the one hand and the groups (22) of inclined perforating elements (22.1, 22.2 and 22.3) on the other hand. Perforating tool according to claim 1, characterized in that the perforating elements (22.1, 22.2, 22.3) of the groups (22) are inclined at an angle (24) between 20 ° and 40 ° with respect to the perforating tool (15). Perforating tool according to claim 4, characterized in that the angle (24) is 30 °. Perforating tool according to claim 1, characterized in that the groups (22) of perforating elements (22.1 to 22.3) contain cutting sections (21) in alternating order between the groups (22). Perforating tool according to claim 1, characterized in that the inclined perforating elements (22.1, 22.2, 22.3) are symmetrical with respect to the perforating tool (15) from the plane of the perforating tool (15) on the leading edge (22.5) and trailing edge (22.4). Perforating tool according to claim 1, characterized in that the inclined perforating elements (22.1, 22.2, 22.3) with respect to the perforating tool (15) are exposed on one side with their rear edge (22.4) from the plane of the perforating tool (15). Perforating tool according to claim 1, characterized in that the inclined perforating elements (22.1, 22.2, 22.3) are exposed with their front edge (22.5) in relation to the plane of the perforating tool (15). Perforating tool according to claim 1, characterized in that the inclined perforating elements (22.1, 22.2, 22.3) are designed as perforating tongues. Perforating tool according to claim 10, characterized in that the individual perforating elements (22.1, 22.2, 22.3) of a group (22) of perforating elements are separated from one another by slot-shaped openings (25, 36). Perforating tool according to claim 1, characterized in that the inclined perforating elements (22.1, 22.2, 22.3) of the groups (22) of perforating elements have an inclined surface (23) at their tip (26). Perforating device in a web-processing rotary printing machine subordinate folder, with a perforating tool according to one of the preceding Expectations. Perforating tool for perforating single or multi-layer material webs or specimens (1) separated therefrom, which comprises a first half (16) and a second half (17), with the following features: a number of perforating teeth (15) accommodated in the first half (16) of the perforating tool a tool-free gap (18) formed in the first half (16) a cutting zone (19) arranged in the second half (17) and a plurality of perforating elements (22.1, ....... 22.n) arranged in a row in the second half (17) and arranged obliquely with respect to the perforating tool (15).

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