Folding apparatus

Printing – Rolling contact machines – Rotary

Patent

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Details

270 47, B41F 504

Patent

active

052878058

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The invention relates to a control for folding blades and/or grippers of a collector cylinder in a folding apparatus of a web-fed rotary printing press.


DESCRIPTION OF THE PRIOR ART

The cover device contains a drivable cover disk with fixedly disposed cover cams. With an arrangement of this type it is necessary that the cover disk not only runs during collect production, but also during non-collect production, which often occurs in actual operation. With an arrangement of this type the number of successive collect operations is very limited. Experience has shown that the limit is reached here with two successive collect operations. More than two collect operations are impossible here.
On the other hand, the width of the printing press and with it that of the printing cylinder diameters is increased, so that the result is more etchings (sides) at the circumference than previously for example eight etchings at the circumference.


SUMMARY OF THE INVENTION

It is the object of the invention to provide a control for folding blades and/or grippers of a collector cylinder having seven gripper systems and seven folding blades, by means of which "partial collect" is possible.
The advantages attainable by means of the invention consist particularly in that the number of successive collect operations, and thus the number of possible production types, can be increased with simple and cost-effective means. In an advantageous manner these are the following productions:
1. Non-collect, using 4U-, 6U- or 8U-printing cylinders,
2. Dual collect, using 4U- or 8U-printing cylinders,
3. Triple collect, using 6U-printing cylinders,
4. Quadruple collect, using 8U-printing cylinders,
5. Partial collect (non-collected signatures plus dual collected signatures), using 6U-printing cylinders,
6. Partial collect (non-collected signatures plus triple collected signatures), using 8U-printing cylinders.
"Partial collect" is understood to mean that not only non-collected products, but also collected products are continuously generated in one production position, for example C; A+B with 6U-printing cylinders, and A; B+C+D with 8U-printing cylinders.
It furthermore advantageous that practically a variable type of cover disk is obtained and therefore more than two collect operations can be performed.
The result is a more universal folding apparatus than before, by means of which all products of a printing cylinder with up to eight etchings can be easily collected on top of each other during one revolution, which allows the efficient production of even comparably thick products. Another advantage of the measures in accordance with the invention can be seen in that the variable cover disk can simply stand still during non-collect production, in the course of which all or at least the interfering cover cams are simply retracted, which is advantageous in that unnecessary wear is prevented.
In an advantageous embodiment of the relevant measures, the cover cams can be adjustable by means of an adjusting disk which is coaxial to the cam support, can be driven together with the cam support and is adjustable in respect to the latter in the peripheral direction. This measure permit a simple adjustment of the cover cam by turning the adjusting disk, which permits automatic adjustment. In a practical way, the cam support and the associated adjusting disk driven in the same way could in this manner be drivably connected with each other by means of a differential gear, which can be adjustable by means of an auxiliary drive device which can be rendered passive during the production run. After having been set, the differential gear functions practically as an inherently rigid transfer organ.
A further advantageous step can consist in that the cam supports or adjusting disks associated with the folding blades and the retaining elements are each connected with each other fixed against relative rotation, and are preferably releasably clamped against each other. These measures permit a common drive of the two cam supports or the two

REFERENCES:
patent: 3263988 (1966-08-01), Heimlicher
patent: 4946751 (1990-08-01), Liebert
patent: 5000433 (1991-03-01), Priim et al.
patent: 5039076 (1991-08-01), Fischer
patent: 5065993 (1991-11-01), Reponty
patent: 5078374 (1992-01-01), Odeau
patent: 5096174 (1992-03-01), Nishihara

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