EP0119570B1 - Former for the folding device of a rotary web printing machine - Google Patents

Description

The invention relates to a former for a folder of a rotary printing press according to the preamble of claim 1.

From DE-A 2024648 a former for a folder of a web-fed rotary printing press is known, which is arranged in side frames above a folding cylinder group with horizontal cylinder axes.

In web-fed rotary printing presses with multiple printing units and paper webs, it is often required to use e.g. four-color print - depending on the product to be manufactured - to be placed on top or down at the funnel inlet. Until now, complicated paper web guides and applications were necessary for this.

The invention has for its object to provide a former, which makes it possible to easily expand the imposition scheme.

According to the invention, the object is achieved by the characterizing part of patent claim 1.

The advantages which can be achieved with the invention consist in particular in that, by using the funnel according to the invention, the web-fed rotary printing press can be used both for the production of newspapers (with the puncture on the newspaper foot) and for commercial prints. Complicated turning devices are not required. With four-color printing, it is no longer necessary for the paper web side printed in four colors to run over paper guide rollers. Four-color printing can be easily placed either on the outside of the folded product or inwards.

• Fig. 1 eine schematische Darstellung einer Rollenrotationsdruckmaschine in Reihenbauweise mit einem Falzwerk mit aufgesetztem erfindungsgemässen Falztrichter,
• Fig.2 eine Seitenansicht des erfindungsgemässen Falztrichters mit aufgesetzter Papierbahnführung,
• Fig. 3 eine Draufsicht auf Fig. 2,
• Fig. 4 einen Schnitt IV-IV in Fig. 3,
• Fig. 5 einen Schnitt V-V in Fig. 3.

An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:

• 1 is a schematic representation of a web-fed rotary printing press in a row construction with a folding unit with a folding former according to the invention,
• 2 shows a side view of the former according to the invention with the paper web guide attached,
• 3 is a plan view of FIG. 2,
• 4 shows a section IV-IV in FIG. 3,
• 5 shows a section VV in FIG. 3rd

As shown in Fig. 1, e.g. two paper webs 1 and 2 in five printing units 3, 4, 5, 6, printed in face and reverse printing. The paper web 1 is e.g. monochrome, the paper web 2 printed in four colors in face and reverse printing and then fed through a drying oven 9 via paper guide rollers 11 to a folding former 12 according to the invention in a folding unit 13.

The folding former 12 is mounted in side frames 14, 16 in a known manner. In the upper part of the side frames 14, 16, paper guide rollers 17 and driven draw rollers 18, 19 are also arranged in a known manner.

The side frames 14, 16 are screwed to a carousel upper part 21. The upper part of the carousel 21 is seated on a carousel base 22. The upper part of the carousel 21 can be rotated on the base of the carousel 22 by means of a steering ring 23. Here, the carousel upper part 21 and a lower ring 26 of the steering ring 23 are attached to the carousel base 22 on an upper ring 24 of the steering ring 23. The folding former 12 attached to the side frames 14, 16 can thus be rotated horizontally by at least 180 °. The side frames 14, 16 are fastened to the upper ring 24 via four horizontal upper struts 27, 28, 29, 31. Four lower horizontal struts 32, 33, 34, 36 welded to the carousel base 22 serve to fasten the lower ring 26 to the carousel base 22. On an underside of the upper struts 27, 28, 29, 31 and on an upper side of the lower struts 32, 33, 34, 36 upper 37 and lower wedge 38 are screwed. They enable the upper part of the carousel 21 to stand securely with the side frames 14, 16 on the carousel base 22 in the 0 ° position of the former 12 - that is, it is inclined toward the printing units 4, 5, 6, 7 (see FIG. 1). - Or in the 180 ° position - that is, the former 12 is inclined away from the printing units 4, 5, 6, 7. Locking devices 39, 41 ensure that the former 12 can be held either in the “0 ° position” or in the “180 ° position”. Here, a locking stop 42, 43 in the form of a tab is attached to the carousel base 22 and an upper locking part 44, 46 in the form of a tab is attached to the top of the carousel 21. The upper locking parts 44 and 46 strike in the locking positions 0 ° and 180 ° on the locking stops 42 and 43. There is a threaded bore in the locking stop 42. In each of the upper locking parts 44, 46 there is a hole through which a screw is screwed into the threaded hole, so that the upper part of the carousel 21 is securely locked on the base 22 of the carousel. On the upper part of the carousel 21, two vertical fastening plates 40, 45 are attached, between which two conventional funnel inlet rollers 47, 48 are rotatably mounted in their lower ends.

Claims (3)

1. Former for a folder of a web-fed rotary printing press whereby the former (12) is arranged in side frames (14; 16) above a group of folder cylinders, characterized in that the former (12) is rotatably arranged around a vertical axis above a group of folder cylinders and that locking devices (39, 41) are provided to fix the former (12) in the two working positions in the range of rotation.

2. Former in accordance with claim 1, characterized in that the former (12) is secured between side frames (14, 16), that the side frames (14, 16) are screwed to a carrousel upper part (21), that a carrousel base part (22) set on top of the folder side frames is provided, that a steering ring (23) is mounted between the carrousel upper part (21) and the carrousel base part (22).

3. Former in accordance with claims 1 and 2, characterized in that in the side frames (14, 16) for the former (12) a plurality of paper guide rollers (11) are arranged.

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