DE449118C - Folding device for rotary printing machines - Google Patents

Description

When larger newspaper rotary printing presses, e.g. B. multi-roll machines, full machine utilization even with poorly folded material - low number of sheets should be achieved, for example, if on a 32-sided two-roll machine four-sided 8-fold newspapers are to be produced, so the machine must be with several Folding devices are equipped,

ίο in this case with four folding devices, because such a folding device, consisting of the former for the first fold and the folding cylinder for the second fold, usually only two sheets are processed for the cylinder revolution.

Each folding device must be equipped with a special output because With the previous means an orderly filing and counting of the contributions of several Folding devices on a common output belt cannot be achieved. For example So a two-roll machine for the production of four-sided newspapers in S-fold number must have four outputs.

Since each exit has a man to operate or the connection of your own Due to the conveyor system, the increase in the number of folding devices in a rotary printing press is an essential one Increased cost and difficulty of operation, resulting in the advantage of better machine utilization is partially lifted again in the case of weak material to be folded.

The invention relates to a device which enables any number of folding devices to be connected to a single common output in such a way that the correct Depositing and counting of the folded material is not affected. The essence of the invention is that several folding knife cylinders with a common one connected to the output belt Working jaw cylinder, in which the jaws are distributed in groups over the circumference, so that each group contains as many jaws as there are knife cylinders and each jaw a group always only works with the same folding knife cylinder.

The drawing shows an exemplary embodiment of the subject matter of the invention, namely a folding device for a number of times when printing four-sided Newspapers on a 32-page two-roll press.

There are T ₁ , T ₂ , T ₃ , T ₄ , the folding formers, A, B, C, D are the folding knife cylinders, one of which is assigned to a funnel. The folding blade A, B, C, D are reasonable to the common jaw cylinder E

and each have two folding knives fm _x and fm _z as well as two needle groups n _x and M ₂ , as well as grooves for the cutting knives s _m arranged in the cutting cylinders F ₁ G, H, I. The jaw cylinder E is equipped with several - in the illustrated case four - groups of jaws: i _o , i _h , i _c , i _d , 2 _a , 2j, 2 _C , 2 _d , Za, 3b> 3c> 3d ' 4 _a , 4fr 4c Ad provided. The folding jaws in each group with the same letters always work together with the knife cylinders of the same name, i.e. the folding _{jaws I 0} , 2 ffl, 3 ₀ , 4 _a with the knife cylinder A, the folding _{jaws I 6} , ² b '3b> 4b ^with the knife cylinder B etc. On the other hand, the individual folding jaw groups work together with the two folding knives of each knife cylinder in such a way that group 1 with all folding knives fm _v, group 2 with all folding knives fm ₂ , group 3 again with the folding knives fm _x and so on .

The device described works as follows :

The from funnel T ₄ . coming, the knife cylinder pair Ό and; The paper web fed in is grasped here in a known manner by the needles W ₁ , then cut transversely and the severed sheet is folded transversely between the folding knife fm _x and the folding flap 3 ^. During further rotation of the jaw cylinder E in terms of the direction of the arrow "a sheet is separated from the next by the funnel T ₃ paper web and between · in the same way seamed 3 _C 'the" folding blade' C and the jaw, further comprising a sheet of the funnel T ₂ coming paper web between the folding knife cylinder B and the folding _{jaw 3 6} - folded and finally a sheet of the AOm funnel T ₁ coming paper web between the folding knife cylinder A and the folding _{jaw 3 a} folded.

The four folded sheets are staggered by an arc secondly, the distance between two jaws above the other on the cylinder E, and be taken during further rotation of the jaw cylinder E, until they reach the region of the output belt. Here the four folding jaws open one after the other, and the folded sheets are taken over by the output belt K in a known manner and conveyed out. The process described is repeated in the same way for the other groups of folding jaws.

The distance between the folding flaps in a group must be chosen so that the rear end of the sheet stack in terms of the direction of rotation - does not cover the first folding flap a of the next group.

It is of course possible to couple even more folding devices to a common outlet in the manner described; in this case only the jaw cylinder E is to be selected correspondingly larger so that the required number of jaws can be accommodated in it. ·

As with conventional folding devices, this can also be done by merging several strands of paper in front of or behind the funnels and by arranging collecting cylinders stronger folding packs can be achieved, in which case only a part of the folding knife cylinder and jaws are in operation.

The counting can be done in a known manner as before with individual exits by later opening a folding jaw or a folding jaw group at regular intervals or in some other way

Claims (2)

Claims: _, 1. Folding device for rotary printing machines, characterized in that several folding knife cylinders (A, B, C, D) work together with a common jaw cylinder (E) connected to the output belt and the folding jaws are distributed in groups over the cylinder circumference; that each group (1, 2, 3, 4) contains as many folding blades as there are folding blade cylinders, and each folding blade of a group always works with 'only one and the same' folding blade cylinder, with the individual folding blades of a group in succession The sense of the direction of rotation of the cylinder come into effect in such a way that the “last flap of a group folds the first sheet” and the leading first flap folds the last sheet. 2. Folding device according to claim 1, characterized in that the distance the folding jaws of a group are chosen so that "the total length of the stagger if all folding jaws are loaded with arches, is smaller than the distance in the sense of the direction of rotation 'tion of the first flaps of two adjacent groups, so that the rear end of the sheet stack in terms of the direction of rotation does not cover the first folding flap (a) of the next group. 1 sheet of drawings.