DE2048141A1 - Clamping device for flexible printing plates to be clamped on cylinders of printing machines - Google Patents

Description

Patent attorneys

Plpf. Ing. F. Wsickmann ,.

Dipl. Ing. H. Weickmenn, Dipl. Phys. Dr. K. Fincke

Dipl. Ing. F. A. Weickmann, ΟίμΙ. Cheifl. B. Huber

8 Munich 27, Möhlstr. 22nd

from china factory

Winkler, Fallert & Go. AG

WyIerringetrasse 59

Bern / Switzerland

Clamping device for to be clamped on cylinders of printing machines flexible printing plates

The invention relates to a clamping device for on cylinders Flexible printing plates to be clamped by printing machines with register adjustment in circumferential and transverse directions.

Flexible printing plates are preferably prepared in such a way that that the printed image is exactly to the previously punched register holes and slots. The printing plates are then Bent off in register and clamped in the clamping device of the printing press cylinder plate cylinder. Basically the printing plate is therefore in register on the cylinder.

Even if this well-known jig for single-color printing and is sufficient for simple multi-color printing, is available in newer versions Time for quality pressure but cases where, within narrow limits, a Adjustment due to the print image is desired.

Ba are already a large number of clamping devices which the possibility of the Registenaachene elnschlieseen, e.g.

109819/0127

ORIGINAL INSPECTED

German Patent No. 1 178 442, or the USA Patent No. 2,768,579, which the latter has a certain resemblance to ours Registration has. However, this version uses pressure plates that are bent about 90 °, which means that suspension pins are necessary to avoid the pressure plate rising up.

The printing plates according to the invention, on the other hand, are acute-angled bent, whereby the printing plates are automatically printed towards the center of the cylinder under applied tensile stress. The attached pin is only used to fix the pressure plate on the side, for the side register.

In addition, the citation requires a very large channel because the clamping elements on the back are tangential Attack the direction of the slide rails. The clamping elements according to our application, on the other hand, act radially and lie between the two slide rails, making the cylinder debilitating channel becomes small.

The saw shape of the Spannschieneii according to the USA patent is also very expensive and expensive.

The present invention has means for clamping printing plates in a tight space quickly, cleanly and in register in the circumferential and transverse directions without much robbery work and, if necessary, for making legal corrections. It is characterized in that the printing plates dasρ at both ends at an acute angle bgebo ^ ^ s are and the Spinnlelsten spitzwink j

· lig, eeiu Egyptian '; egwadjjjuAw gtjrieirfeete ^ ßimabelföiwlge parts having t to welohe the epitzwinilig curved plates ""leg; are, and with which leaf springs cooperate dit & ψ, Zyliiaäerkkörper'festgema ^ t Bind, whereby they do not touch the clamping strips when released for ppannvorriohtun / · while the clamping strips fcezw. the ends of the plates come into contact with the leaf springs during tensioning and these one

109819/0127

ORIGINAL

Avoid bending the ends of the panels under tension, whereby the swiveling of the clamping bars is carried out between the clamping bars, approximately radially to the cylinder arranged clamping screws is made.

An exemplary embodiment of the invention is shown in the drawing. It shows!

Fig. 1 shows a cross section through the clamping device with a clamped pressure plate

Fig. 2 shows a cross section through the opened clamping device

3 shows a partial section of the clamping bar with a plan view of the protruding clamping cam

FIG. 4 shows a cross section along line I - I in FIG. 5

Fig. 5 is a plan view of the cylinder with the clamping bars and section through the storage of the clamping bars, corresponding to the line II - II of FIG. 4

On the cylinder 1, the printing plate 2, which is bent in register with the parts 3 and 4 at an acute angle, is placed. Channel 5 is incorporated into cylinder 1 and, if necessary, partially filled by TJ-shaped rail 6. Clamping bars 7 and 8 with their beak-shaped parts 9 and 10 engage in parts 3 and 4 of bent pressure plate 2. The register pins 11 engage in the slots 12 of the pressure plate 2. In addition, the clamping bars 7 and 8 are provided with protruding clamping cams 13, 14 on which clamping screws 15 press and pivot the clamping bars so that the beak-shaped part 9 of the clamping bar 8 against the beak-shaped Part 10 is moved. In the swiveled-back position according to ¹ · j ⁽ fig. 2, the pre-bent plate 2 can be placed on it with ease.

109819/0127

In addition to the tensioning screws 15 at one of the two clamping bars 7 _f 8 may still be attached at least one limit screw sixteenth It is used to give one clamping bar and thus one printing plate edge a fixed position in its working position. If necessary, the limiting screw 16 can be adjusted.

The clamping bars 7, 8 have bores 17, 18 at both ends, into which, on the one hand, the bearing pin 19 engages, which is pressed into bearing 20 and, on the other hand, the bearing sleeve 21 engages in the clamping bar which is pressed into bearing 20 is. Clamping strip 8 contains a thread 22 into which a register screw 23 engages, the head 24 of which has a toothing 25 having. The register screw 23 has a pin 24 provided, which is supported on the bearing 20, the pin 24 having a slot 25 so that the register screw 23 can be screwed into the thread 22.

The bearing 20 is provided with a bore 26 in which Screw 27 is used, which is in the toothing 25 of the register screw 23 engages, the worm 27 being a hexagon socket 28 has to adjust the pressure plate 2 side register by means of a socket wrench. To secure the resilient pressure piece ^ 29 is used to rotate the worm. 30 is a grease nipple.

To prevent the bent ends of the pressure plate 2 from opening, springs 31 are attached to the U-shaped rail 6 by means of screws 32.

109819/0127

Claims (2)

PATENT CLAIMS: FlS clamping device for flexible printing plates to be clamped on cylinders of printing machines with register adjustment in the circumferential and transverse direction by means of swiveling and longitudinally displaceable clamping bars, characterized in that the printing plates (2) are bent at an acute angle at both ends and the clamping bars (7, 8) are acute-angled , beak-shaped parts (9 »10) directed obliquely against each other, around which the acute-angled pressure plates (2) are placed, and with which leaf springs (31) cooperate which are fixed to the cylinder body (l), whereby they are fixed when the clamping device is released Do not touch the Spannleisfcen while the clamping bars or. the plate ends come into contact with the leaf springs (31) during tensioning and these prevent the plate ends from bending up under the tension of the plate, the pivoting of the clamping bars being carried out by clamping screws (15) located between the clamping bars and arranged approximately radially to the cylinder. 2. Clamping device according to claim 1, characterized in that that at least one of the clamping bars has at least 'one limiting screw (16) which when tightened Clamping screw defines a basic position of the circumferential register. MASCHINEEFABRIK WIMLER, FALLERT & CO AG 109819/0127