DE1942398A1 - Cylinder arrangement for offset machines - Google Patents

Description

Patent attorneys Dipl.-Ing. F. Weickmann, 1942398

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

8 MUNICH 86, DEN

PO Box 860 820

MÖHLSTRASSE 22, NUMBER 48 39 21/22

SCGA

MASCHINENFABRIK WINKLER,
FALLERT & CO. AG

Wylerringstrasse 39
Bern / Switzerland

Cylinder arrangement for offset machines

The invention relates to a cylinder assembly for Offset machines, letterpress machines for indirect printing and the like machines with which the blanket and impression cylinders interact in different ways various color combinations can be achieved under Use of tabs which are arranged pivotably about the respective plate cylinder, wherein the tabs each have at least one swiveling eccentric * liner included in which the associated blanket cylinder is rotatably mounted »

Cylinder arrangements are known in which the blanket cylinder is pivoted about the associated plate cylinder the plate cylinders are rotatably and fixedly mounted in bearings in the machine wall, the blanket cylinders rotate in bearings, which are held in tabs. This version is sufficient for indirect letterpress printing, where it is not necessary to lift off the blanket and plate cylinders from each other with every interruption of operation.

00981170439

So is US Patent 3,329,086 known, the blanket cylinders in offset machines to be arranged in such a way that they can be pivoted in Eccentric bushes are rotatably mounted. It is also known from German patent specification 436.672, every four-cylinder offset printing machine Rubber cylinder rotatable in rotatable eccentric bushes to store, which are arranged in tabs pivotable about the axis of the respective plate cylinder. These Versions can be set up for double-sided printing or for single-sided printing. About the change To be able to do from one-sided to two-sided printing or vice versa, however, are cumbersome To make new settings, which take a lot of time and cause waste.

The invention is based on the object mentioned To correct defects and to enable the rubber ' Mizylinders either exactly and quickly in the position for one-sided or in the position for both-sided Pressure brought and at machine standstill the rubber and plate cylinder can be lifted from each other.

According to the invention, this object is achieved by that the tabs each have a nose and stops are arranged on the machine frame, such that the Lugs with the Guimaizylindern optionally by means of a Shifting device in the position for one-sided Or swiveled to the position for double-sided printing be, whereby for the fixation in the first-mentioned position the nose ait the stop to the plant is brought and for the fixation of the position for two-sided pressure a nose as the corresponding stop is present.

In the following, the invention is based on the in the fi

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Guren illustrated embodiment explained in more detail. Show it

1: an elevation of the cylinder arrangement for one-sided printing;

Fig. 2 »an elevation of the cylinder arrangement for both sides en pressure;

3 * shows a longitudinal section of the cylinder bearing;

4t shows a displacement device for double-sided printing;

5 shows a shifting device for one-sided printing;

Fig. 6: a schematic representation of the cylinder " Order.

From Fig. 1 it can be seen how the plate cylinder 1, blanket cylinder 2 and impression cylinder 3 interact for one-sided printing. Cylinder 2 is rotatably mounted in bracket h , driven by gear train 5 · The brackets can be pivoted by means of displacement device 6, d ± for example consists of worms 71b, worm wheels 9, 10, threaded spindle 11 and link 12. The cylinder rotates in the eccentric bushing 13, which is in the working position with one-sided pressure in A and in the non-working position with B. Eccentric bushing 13 carries protruding cams 14 which, in the working position, are pressed against stops 15 when there is pressure on one side by pressing device 16. The stops 15 are adjustable, for example. The cylinder 2 can be brought into the non-working position B by means of the pressing device 16. the

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Position B is reached when cam 14 is on its back hits stop 17. .

If the printing unit is to be set up for double-sided printing, then the tabs 4 are moved into the position according to FIG. 2 by means of the shifting device 6. The nose 18 then moves away from the stop 19, which defines the position for one-sided pressure, and the nose 20 strikes the stop 21. As a result of unavoidable machining inaccuracies, it can happen that the nose 20, which is attached to the bracket 4, which carries the rear bearing of the cylinder 2, hits the stop 21, while the stop 21 on the front is not yet completely reached. So that the stop 21 is also reached on the front side - its setting depends on printing concerns - the screws 7, 8 are arranged on the shafts 22, 23 so that they can be axially longitudinally displaced. Before they reach the stop 21, they are pressed against the shoulders 26, 27 by springs 24, 25. When the nose 20 hits the stop 22, for example on the rear flap 4, the screw δ begins to lift off its shoulder as the screws 7 »-8 continue to rotate. It is rotated until the screw 7 also begins to lift off its shoulder 26, ie until the nose 20 and stop 21 on the front side also touch. The distances x, y of the screw 7t 8 from their shoulders are then unequal, such as the drawing in Fig. K exaggerated strongly.

The pressing device 16 is on the one hand attached to bracket 4 by means of support 2b and on the other hand is connected to the eccentric bushing 13 by lever 29 * Stop 17 is attached to the machine wall 30, while stop 15 is attached to bracket 4. With «Pivoting

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from tab k to position door on both sides, cam ik comes out of reach of stop 1 ?. In contrast, the cam 31 comes into the area of the stop 32, which is attached to the machine wall 30 at the top. Stop 32 is used for the limitation in non-drive position G. Since stop 17 is now out of engagement, the pressing device 10 can continue to rotate the eccentric bushing 13 up to the working position D, which is limited by stop 33 · 2 serves to guide the movement of the front and rear eccentric bushing 13 in parallel Shaft 3 ^ »which is connected to the eccentric bushes 13 via toothed segment 35 and toothing 36. A pressing device 16 may k on only one tab or be arranged both on the front and on the back flap "

From Fig. 6 it can be seen that the axes of rotation of the eccentric sleeve 13 can assume two functionally necessary lengths E, F. The axis of the rubber cylinder has four functionally necessary layers, A, B, ₁ C, D.

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Claims (4)

- b τ A NS PR Uf CH B- Cylinder arrangement for offset presses, letterpress masch.irf.en for iiidirekfeäil pressure and the like machines which by variously the Gumrai- and Gegendruekzylinder various Farbonkoiabinat iiusamnienwirke-n ions are received, using tabs which tenzylinder to the respective plate-v- ar swivel bar are arranged, the tabs each containing at least one swivel o eccentric bushing, in which the associated Guimni cylinder is stored three liters, characterized in that. the pockets (4) each have a lase "('iö and 2θ) and cut- offs (iy and 21) are angoeidnet on the machine frame, such that the lashes (4) with the" ÖUEafel '%? y "lisidern (2;) . optionally by means of a 'Veirschiebevörrietüng (ö} in the position for one-sided printing or i & the position for double-sided printing ges.chwerikt , whereby for the "fixation in the first-mentioned position the nose (1 ü} with the stop (19) to System is brought and the nose (20) rests against the stop (21) for fixing the position for pressure on both sides. 2. Cylinder arrangement according to claim 1, characterized in that that the eccentric bushing (13) mounted in the tabs (4) has a protruding cam ■ (1 "4). carries, which when turning the eccentric bushing (l3J in dig ^ Arbeitsistellt? ng (Α) for one-sided printing with part όί, ΐαβϊ »changing device (16) against a νβί-stellbäreat Stop (15;) is pressed and andecp- * on the one hand is brought into the non-division of labor (B-), such that the cam (1Λ) with its back on the stop (17) strikes. . ■ ■■■ ^{-:; :} - ■■■ - ■:. ■ '■ 00S'8i "1/0439"""^;' 3. Cylinder arrangement according to claims 1 and 2, characterized in that the eccentric bush 03) additionally carries a protruding cam (3V) which, when the eccentric bushing (i3) is rotated, i- ⁿ the non-working position (c) for double-sided pressure by means of the pressure device ( .16) is pressed against a stop (32) attached to the machine frame (30) and, on the other hand, the pressing device can turn the eccentric bushing (13) further up to the working position (d), which is limited by the stop (33) » 4. Cylinder arrangement according to claims 1 to 3 »in which each tab has a displacement device which are connected in pairs and consist of worms and worm wheels, as well as threaded spindles and links, characterized in that the screws (7 and 8) counter in one direction Press a fixed stop (26,27), but can be pushed in the opposite direction against spring force in order to compensate for differences in the stops. 009811/0439