EP0244761B1 - Folding and cutting device for small in-line folding products - Google Patents

Abstract

1. A device mounted on a web-fed printing press, for folding and cutting part circumference length copies, with web rolling units fitted to a folder, which include slitting and turning devices for the printed web, with former fold stations of the plough type (I, II, III, IV), with a cutting unit (11, 13) for cutting the printed web at right angles to the web edge and with a conveyor belt system having a reduced speed which leads to a delivery point and produces formation of imbrication, characterized by the arrangement of the former fold stations (I, II, III, IV) in the superstructure of the folder, by an initial cutting unit (18, 19) for cross cutting the former folded printed web (D) into one or several web cuttings (P) as well as by leading the imbricated web cuttings (P) into a corner conveyor (20) whereupon the web cuttings, turned through 90 degrees, can be lead to a second cutting unit, which consists of a rotary slitter (23) whose lateral circular cutter (24, 24') is adjustable for the purpose setting the spacing when cutting part circumference length copies (N).

Description

In the case of a folder of known configuration, as shown in A. Braun: Atlas of Newspaper and Illustration Printing, Polygraph Verlag, Frankfurt, 1960, the types of folds used for a folded printed product refer to the first longitudinal fold (funnel fold), transverse fold with or without collective production and possibly the second Longitudinal fold (sword fold). Sections of very wide webs or also sections originating from partial webs obtained by slitting are used for the folding. Turning and merging devices allow a diverse path arrangement, so that the image or page sequence can be varied in a relatively versatile manner.

The product designed at production speed can be specially designed by adding aggregates to the folding line, through which perforation, adhesive application, numbering, printing and other measures can be removed. Separate further processing outside of the printing and folding line is not necessary in most cases, since the application of the measures mentioned in the so-called in-une process delivers finished products.

An extension of the known folding apparatus with regard to the longitudinal folds that can be attached is provided by a plow folding station upstream of the funnel, cf. the arrangement offered by the manufacturer SPEC. The plow folding station shown is located in the superstructure of the folder, accessible via the gallery.

Since the running direction and web level in front of and behind the plow folding station are almost unchanged, the plow folder can be switched on along the existing web processing without complex web guiding means.

If several plow folding stations are to be used to produce a multi-folded product, the web paths to be counted for each plow folding station, which must be switched on to compensate for the web tension, add up.

It is known to enable the use of several plow fold stations by leading the printing web out of the print line and taking a large footprint over plow fold units arranged one behind the other, cf. the configuration shown in the Albert Frankenthal brochure.

As is known, the sheet is cut to size transversely to the unwinding direction by means of the cutting cylinder arranged downstream of the former. Format cuts of this type can also be carried out with the plano delivery for folded products that are equally thick across the width, ie have the same number of sheets left and right justified. The plano boom, which has a cross cutting device, is set up adjacent to the folder and is used when no cross folding and gathering is required. In view of the conventional format requirements of the printed products, both of the cutting devices mentioned are designed for cutting long or semi-long sections. (The term long or half long refers to the circumferential value of the impression cylinder). Smaller section lengths require the use of a variable rotary cross cutter with several knives distributed over its circumference and running in the axial direction. The adjustment of the knives and the high cutting frequency, which is a multiple of the cylinder speed, pose problems during operation. The known arrangements have the disadvantage that the processing of multiple longitudinally folded products, which also have small useful lengths lying below the cylinder circumference, is very complex in the in-line method and is therefore also prone to failure. The series connection of plow folding stations set up outside the folder in conjunction with a variable rotary cross cutter not only poses drive and web tension problems due to the elongated line, the high cycle frequency of the knives of the variable rotary cross cutter also requires the web or production speed to be reduced.

• An eine Rollenrotationsdruckmaschine angebaute Vorrichtung zum Falzen und Schneiden teilumfanglanger Nutzen, mit in einem Falzapparat angeordneten Bahnabwicklungselementen einschließlich Längsschneid- und Wendeeinrichtungen für die Druckbahn, mit Längsfalzstationen des Pflugfalztyps, mit einer Schneidenrichtung zum Schneiden der Druckbahn quer zur Bahnkante und mit einem zu einer Auslage führenden, verlangsamt bewegten und überlappende Schuppenstromformation ergebenden Bandleitungssystem, bzw. von einem Stand der Technik, wie er für In-Une-Produktion in Verbindung mit der Durchführung auf einem Falzapparat unter Umfassung folgender anderer Merkmale besteht:
• An eine Rollenrotationsdruckmaschine angebaute Vorrichtung zum Falzen und Schneiden teilumfanglanger Nutzen, gegeben durch einen Falzapparat mit: Bahnabwicklungselementen, Längsschneid-und Wendeeinrichtungen, einem Falztrichter, einer dem Falztrichter vorgeordneten Pflugfalzstation, einer Falztrichterumführung, einem Schneidzylinder, der gegen einen Punktur-Nutenzylinder abwälzt, einem die Bahn - Abschnitte vom Punktur-Nutenzylinder abnehmenden Oberführzylinder, an den ein zu einem ersten, mit Bahngeschwindigkeit bewegtes Bandleitungssystem führender Abstreifer angestellt ist, einem Messerfalzwerk, einem zu einer Auslage führendes verlangsamt bewegtes, überlappende Schuppenstromformation ergebenden zweiten Bandleitungssystem stellt sich daher die Aufgabe, die Verarbeitung von mindestens einmal längsgefalzten Produkten mit einer kleineren als einen Zylinderumfang betragenden Nutzenlänge zu vereinfachen.

Based on a state of the art, as specified in the known in-une processing system, including the following features:

• Device for folding and cutting partially full-length benefits attached to a web-fed rotary printing press, with web processing elements arranged in a folder, including slitting and turning devices for the printing web, with plow-type longitudinal folding stations, with a cutting direction for cutting the printing web transversely to the web edge and with a delivery leading to a delivery slows the moving and overlapping shingled stream formation resulting tape line system, or from a prior art, as it exists for in-une production in connection with the implementation on a folder with the following other features:
• Device for folding and cutting partially full-length benefits attached to a web-fed rotary printing machine, provided by a folder with: web unwinding elements, slitting and turning devices, a former, a plow folding station upstream of the former, a bypass guide, a cutting cylinder that rolls against a puncture grooved cylinder, one of which Web - Sections of the top guide cylinder, which decreases from the puncture groove cylinder, to which a scraper leading to a first tape line system moving at the web speed is attached, a knife folder, a slow moving, overlapping shingled stream formation resulting in a delivery, the task thus arises Simplification of at least once longitudinally folded products with a usable length smaller than a cylinder circumference.

A prerequisite for the solution to be created is to attach it to existing equipment in the folder and to include it as much as possible. This is intended to increase the degree of utilization of the existing facilities and to ensure easy conversion or retrofitting between the types of production.

The solution created for this, which is reproduced in the characterizing part of the independent claims, is essentially based on integrating the plow folding stations required for the longitudinal folds in a compact manner in the superstructure of the folder and proposing two different cutting devices for cross cutting in the part-length benefits which only the first one works on the web or the folding strand. The second cutting device cuts the sections which are created in the first cutting device and are transversely brought into shingled stream formation to the final utility format.

The advantage of this arrangement consists essentially in the elimination of the variable rotary cross cutter and consequently in a production which is simplified in relation to the web processing and is no longer restricted in speed by the high operating frequency of the rotary cross cutter. The web processing is shortened and thus simplified. Both the cutting device of the plano boom and the cutting cylinder associated with the folder can serve as the first cutting device. the process is decided depending on whether the production without or with a former, i.e. H. Utilization of the longitudinal fold and / or cross fold possibility given by the former is to be used. The transfer devices of the cylinders are expediently designed as punctures. Grippers would of course also be possible. The folder, which is also used for other productions, is of conventional design and is also suitable for collective production and delta fold attachment. a. can be converted to folding flaps by exchanging the punctures.

• Fig. 1: Schematische falz- und schnittechnische Abwicklung zur Herstellung teilumfanglanger Druckprodukte mit dem Falzapparat beigestellten Planoausleger, Querförderer und Rotationslängsschneider.
• Fig. 2: Ablaufschema über die als Oberführzylinder geschalteten Falzzylinder über das offene Schwertfalzwerk zum Querförderer und Rotationslängsschneider.

In the description, an embodiment of the invention is explained with reference to the drawing.

• Fig. 1: Schematic folding and cutting processing for the production of part-length printed products with the folding device provided plano boom, cross conveyor and rotary slitter.
• Fig. 2: Flow diagram of the folding cylinders connected as top guide cylinders via the open sword folding unit to the cross conveyor and rotary slitter.

The folding and cutting solutions described below are intended for use on commercial printing presses.

After leaving the last printing unit and passing through the dryer, the printing web D is fed from the last cooling roller to the folding devices. Punching, perforating or gluing mechanism 29 or 30 can be switched on optionally. To enable turning downwards / inwards or upwards, each plow fold station has a plow fold station 1, 1 ', 2, 2', 3, 3 ', 4, 4 from plow fold stations I, II, III and IV '. The undershot plow folder receives an apostrophe. The plow folding takes place in the direction of the imaginary line which is valid when the web is running straight ahead and which, in the exemplary embodiment, is also the longitudinal axis of symmetry 31 of the plow folding station.

In order to change from an overshot plow folder of a plow folding station to an undershot plow folder of a subsequent plow folding station or vice versa, with the direction of turning changing, paper guide roller groups 5 resulting in S-shaped wrap are arranged. The plow folds are seen in the web development direction at a distance from the longitudinal fold edges to be attached and for the purpose of specific adjustment of the position of the fold edge transversely to the web development direction and lockable.

The longitudinal register stability is created by means of controllable register devices 6 which ensure that the web is cut into the web sections P in the correct position. As a rule, only the last register device 6 located in front of the respective cross-cutting device in the form of the cutting cylinder 12 or the knife cylinder 18 is acted upon. Since the tension web D is removed during the longitudinal folding, wherein any web wrapping is also associated with a loss of web tension, tension roller groups 7 ensure that the web tension is maintained intact.

The arrangement, which is geared towards a practical number of longitudinal folds, has a total of 5 longitudinal folds, including 4 plow folding stations 1, II, III and IV and a folding former 8. Preferably only a maximum of 4 longitudinal folders are loaded. One mode of operation includes the series connection of all 4 plow folding stations I, II, III and IV. In another mode of operation, including the former 8, the plow stations I and II, or a maximum of III, are provided in front of the former 8.

As a special feature, the plow fold station IV is located below the plow fold stations I, II and 111.

The number of plow folding stations I, 11, III and IV which can be connected upstream of the former 8 is limited by the ability of the fold strand to become stiffer from fold to fold. (A drawing of the path from plow folding station IV to the infeed roller of the former is therefore not provided, although this path is generally possible.)

In connection with the number of longitudinal folds to be installed in the product and in connection with the inclusion of the former 8, two different processes result according to the invention.

The first sequence, which includes the former 8, runs over the folding cylinders of the folding unit 9, see also FIG. 2. This makes transverse folding possible.

The cutting cylinder 12, which rolls against the puncture grooved cylinder 10, acts as a cross-cutting device. The folding flap cylinder 11, which is conventionally located in the folding unit 9 and whose flap flaps are exchanged for punctures 13, takes over the web sections P needled onto the puncturing groove cylinder 10. Instead of punctures 13, receiving devices designed as grippers can also be specified. Via a stripper (not shown), the web sections P go to a first strip line system 15 leading through the open, shut-down sword folding mechanism 14. Shingled stream formation is generated in that the subsequent second strip line system 16 is operated more slowly.

For the cross fold case, only the puncture cassettes are exchanged for folding jaw cassettes, and the puncture groove cylinder 10 is additionally equipped with folding knives. In order to achieve the shingled stream formation, the slowed down second tape line system 16 must be slowed down even more in order to bridge the gaps which arise during the transverse folding.

Within the second sequence leading to the plano boom 17, the folded printing web D is cut into web sections P with the knife cylinder 18 belonging to the cross-cutting device. The number of cycles is only one cut per revolution, as is also the case with the cutting cylinder 12 of the folding unit 9. A pair of traction rollers 19 literally drives the multiple-section web sections P into a conveying nip which is formed from a slowed down lower belt line and an upper belt line which is driven at least web speed or higher, so that scale flow formation is formed.

From the second strip line system 16 and from the exit of the plano boom 17, the first and the second sequence match again.

The stream of shingled material, which is still conveyed in the web unwinding direction, arrives in a corner conveyor 20 which rotates the longitudinal axis of the web sections P by 90 ° with respect to the conveying direction.

The shingled stream formation is retained in the corner conveyor 20. The distance from the edge of the web section to the edge of the web section can be changed depending on the speed ratio of the strip lines which are perpendicular to one another, especially since the web sections P run lengthwise and widthwise into the corner conveyor 20 and accordingly the scale spacing also increases by the ratio Width changed to length of the path sections P.

Through a possible inclination of the exit-side belt line system 21 lying transversely to the web development direction, the corner conveyor 20, which points to the entry of the rotary longitudinal cutter 23, in the direction of the stop edge 22 which forces the 90 ° change of direction, and by means of alignment, not shown here, such as so-called joggers, the web sections P in FIG rotated formation so precisely aligned that on the rotary slitter 23 sufficient cutting quality, d. H. Parallelism of edges is guaranteed.

Viewed from the infeed of the rotary slitter 23, the multiple uses N contained in a path section P are now side by side. Their distance determines the lateral distance from the circular knife 24 to the circular knife 24, correspondingly also the lateral distance of the counter knives interacting with the circular knife 24.

If neighboring benefits cannot be clearly separated from one another due to mutual overlapping of the printed image (called overfilling), a cut-out is made at the level of the dividing line. In this case, instead of a circular knife 24 for the separating cut, two pairs of circular knives which cut out a narrow strip and are usually arranged more or less offset in the direction of transport are used.

For a non-slip guidance of the web sections P in the cutting zone, they are guided between the lower and upper belts 26, 27.

A table-shaped rotary slitter 23 with a flat conveying surface can be used. Improved guiding properties can be achieved by a rotary longitudinal cutter 23 which, as shown in the exemplary embodiment, has a drum-shaped counter-knife device 25 and in which the web sections P pass through a curved conveying surface.

The curvature has on the one hand the result that the web sections P are bent and thereby lie more rigidly and securely against slipping, on the other hand the wrapping of the upper belt results in an additionally acting contact force which holds the web sections P on the counter knife device 25.

In the case of a bypass of approximately 180 °, such as in a turning drum, the as yet uncut web sections P and the finished cut panels N enter and exit on the same side. Compared to the table-shaped rotary slitter, this means that less space is required.

The circular knives 24, 24 'are axially aligned at a sufficient distance from the cutting line to the cutting line. If the cutting line spacing is less than the width claimed by the suspension of the circular knives 24, 24', the circular knives 24, 24 'making adjacent cuts are arranged offset to one another. Such an arrangement is used when strip-shaped cutouts are made.

Counter knives and spacers for adjusting the cutting distances both with regard to the width of the panels N and the strip-shaped cutouts are drawn up as rings on the shaft of the drum-shaped counter knife device 25.

Because the circular knives 24, 24 'are immersed in the cutting groove, they are preferred with leading, ie somewhat higher peripheral speed than the scale flow speed, acted upon. To produce the advance, the belts or toothed belts run on a smaller diameter in relation to the outer diameter of the circular knives 24, 24 '.

An upstream knife set of circular knives 24, shown at the top in FIG. 1, cuts the left edge in the case of strip-shaped cutouts, and the downstream knife set of circular knives 24 'cuts the right edge of the cutout. The upper circular knife 24 and the lower circular knife 24 'engage in the same cutting groove.

The small sections originating from two center cuts or from two cutouts give the three benefits N obtainable from a web section P in the exemplary embodiment.

After the rotary slitter 23, the panels N separated from the web section P are fed onto a delivery belt 28 for stacking.

Moving away from the usual division in which the knife is arranged on the cutting cylinder 12 or on the knife cylinder 18 of the cross-cutting device of the plano boom 17, the web section P can also be kept longer than the circumference of the cylinder. Any multiples of the useful length are conceivable for the cutting length of the path sections P. In this case, the cutting cycle is to be set by means of suitable gear technology measures.

When the printing path D runs to the folding unit without former folds, that is from one of the plow folding stations I, II, III or IV directly into the folding unit 9, the folding former bypass is used.

PARTS LIST

Claims (6)

1. A device, mounted on a web-fed printing press, for folding and cutting part circumference length copies, with web rolling units fitted to a folder, which include slitting and turning devices for the printed web, with former fold stations of the plough type (I, II, 111, IV), with a cutting unit (11, 13) for cutting the printed web at right angles to the web edge and with a conveyor belt system having a reduced speed which leads to a delivery point and produces formation of imbrication, characterized by the arrangement of the former fold stations (I, II, III, IV) in the superstructure of the folder, by an initial cutting unit (18, 19) for cross cutting the former folded printed web (D) into one or several web cuttings (P) as well as by leading the imbricated web cuttings (P) into a comer conveyor (20) whereupon the web cuttings, turned through 90 degrees, can be lead to a second cutting unit, which consists of a rotary slitter (23) whose lateral circular cutter (24, 241 is adjustable for the purpose setting the spacing when cutting part circumference length copies (N).

2. A device, mounted on a web fed printing press, for folding and cutting part circumference length copies, which is a folder with: web rolling units, slitting and turning units, a plough fold station (I, II, 111, IV) positioned before the former (8), a former by-pass, a cutting cylinder (12) which rolls against a folding pin groove cylinder (10), a transfer cylinder (11) with folding pins, which takes the web cuttings from the folding pin groove cylinder, and to which a stripper that, at the same speed as the web, drives an initial conveyor belt system (15), a knife fold unit (14), a second conveyor belt system (16) which, at a reduced speed, leads to a delivery point and which produces formation of imbrication, characterized by the arrangement of a group of plough fold stations (I, II, III, IV) before the former in the superstructure of the folder for the undertaking of several former folds, and by the fact that the web cuttings (P), several copy lengths (N) in size, are taken via the folding pin groove cylinder (10) and transfer cylinder (11) through the knife folder (14) which can be switched off, a comer conveyor (20) and a rotary slitter (23) whose lateral circular cutter (24, 241 is adjustable for the purpose of setting the spacing when cutting part circumference length copies (N) can be supplied.

3. The unit according to claim 2 is characterized by being able to use the folding pin groove cylinder (10) and the transfer cylinder (11) as folding cylinders.

4. The unit according to claims 2 and 3 is characterized by being able to exchange the folding pins (13) of the folding pin groove cylinder (10) and of the transfer cylinder (11) for grippers.

5. The unit according to one of the preceding claims is characterized by the rotary slitter (23) having a drum shaped counter cutter unit (25).

6. The unit according to claim 5 is characterized by the fact that for strip form cutouts from the web cuttings (P) an upstream circular cutter (24) and an upstream circular cutter (24') affixed to the circumference of the drum shaped counter cutter unit (25) are placed in position.

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