DE1436532A1 - Device on a rotary offset printing machine - Google Patents

Description

Patent application P Ik 36 532.3-2?
(M 66 586 Vllb / 15d)
Miehle-Goss-Dexter Ine

New description Device on a rotary printing press

The invention relates to a device on a Rotationsoff setdruckmasch ine, which has two plate and two offset cylinders as well as one symmetrical to the two offset cylinders arranged printing cylinder is equipped, for converting the offset cylinder from a double-sided single-color printing enabling operating position in which the two offset cylinders on each other and on their plate cylinders apply, to an operating position corresponding to the one-sided two-color printing, in which the offset cylinder are in contact with their plate cylinders and the impression cylinder »

U.S. Patent 1,459,312 discloses a printing machine known for these two modes of operation, the one middle pressure cylinder and two on both sides of the same arranged offset or blanket cylinders and with these having cooperating plate cylinders, which are assigned a conventional inking unit and a moistening device are. The two offset cylinders are each in Eccentric bushes stored and can be lifted from the adjacent cylinders by means of handles arranged on them will. An adjustment of the cylinder for the transition from

New documents (Art. 7, Paragraph 1, Paragraph 2, No. 1, Clause 3 of the amendment of 4.9.1967)

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the one operating mode to the other operating mode is here not provided. This transition takes place with the known Rather, machine by changing the guideway to printing paper web and changing the nature of a cylinder. When the well-known printing press to the simultaneous If the two sides of a paper web are to be printed on, the paper web is turned counterclockwise from the one peeled off rotating paper roll and between the middle impression cylinder, which is also provided with a rubber blanket and the upper Qf ± 'set cylinder passed through, where this the print image obtained from the printing plate of the upper plate cylinder on the upper side of the paper web transfers and the lower side of the paper web through the The rubber blanket of the printing roller is printed, which picks up the print image from the lower setting cylinder after it is on this is transmitted through the lower plate cylinder. if the printing machine, on the other hand, is to be used for printing only one side of a paper web in two-color printing, see above the paper web is pulled off the paper roll clockwise and between the lower offset cylinder and the Pressure cylinder passed around the pressure cylinder and then passed between this and the upper oil set cylinder, where they have their first color imprint from the lower offset cylinder and then their second color imprint received from the upper offset cylinder "

In this known printing machine, for simultaneous printing of the two sides of a paper web, the middle one Printing cylinders can also be provided with a rubber blanket, which reduces the quality of the print »

Furthermore, by the United States patent specification 3,072,050 a Rotatxonsdrucianaschxne known with two inner cylinders and two outer cylinders, each of which has an outer cylinder is in constant contact with an inner cylinder. The machine can either be used for offset printing,

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by covering the inner cylinder with rubber blankets and the outer cylinder are provided with printing plates and the paper web to be printed · between the pressed against each other inner cylinders is passed. The printing press However, it can also be used for type or gravure printing, when the two inner cylinders are separated from each other while maintaining their contact with the outer cylinders and the paper web between the outer members provided with pressure plates and the respectively adjacent, provided with an oil layer made of glass fibers, cork oti, the like Inner cylinders is passed through in an S-shaped loop around the two inner cylinders, so that they has only tangential contact with the outer cylinders. With this known printing machine, multi-color printing is only possible are generated when two or more of the printing units explained above are arranged one behind the other, each of which has two inner and two outer cylinders »

In addition, the adjusting device is in this known printing machine designed to move the two inner cylinders apart cumbersome, as either for each the inner cylinder a special actuator is arranged or the machine frame consists of two, each consists of parts supporting an inner and outer cylinder, which can be moved towards one another or away from one another by a common actuating device so that the inner cylinders of the two pairs of cylinders are moved against each other or apart · In each case, these are for the actuating devices for rotating bevel gears and other gears passed transversely through the machine frame Shafts required that are exposed to high torsional loads are and therefore can not guarantee with certainty that the arranged on both sides of the machine frame Bearing bushes for the inner «« cylinders, which are also available as fixed-center

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Bushings can be designed, each rotated by exactly the same angle of rotation or the two parts of the M ^ scliinengestelles be brought closer to each other or moved apart by exactly the same amount on each side »

How it is due to the German utility model 1 827 845 a rotary printing press of the type specified above is known in which the offset cylinder is used to convert it each around the axis of the plate cylinder to which they are assigned, are pivotable on an arc of a circle, during the pressure cylinders arranged symmetrically to the fauid fiffet cylinders thereby verscliwenk- or is displaceable that it is mounted on eccentrics. Apart from the fact that in this known machine to pivot the offset cylinder on the mentioned circular path and for pivoting or shifting the "pressure cylinder two different devices are required are, a further training of these devices or, an additional device is required to also in constant contact with the plate cylinders during their pivoting offset cylinder, e.g. for replacement

of the blankets, of the lath cylinders or vice versa the Plate cylinder to be rubbed off from the offset cylinders »

On the other hand, the invention is based on the object for a rotary printing machine of the specified type, which is used as an offset printing machine, when using the appropriate cylinder, however can also be operated as a different type of printing machine, one to switch the offset cylinder from one to the one to create a device that uses other printing processes while maintaining a simple convertibility of the offset cylinder a special device for mutual Lifting off the offset and plate cylinders is unnecessary and that The cylinder blankets can be exchanged without complicating the changeover device »

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To solve this problem, the invention orders that the movement balm used to move the offset cylinder each of the two offset cylinders is curved in such a way that that each offset cylinder is between the two operating positions can be moved into a lift-off position in which the two offset cylinders of the plate cylinders and the Diuckzylinüer are lifted.

The device is preferably designed in such a way that the two offset cylinders in a manner known per se stored in eccentric bushes and this by means of a connecting link and rods articulated on this and on the eccentric bushings are coupled to one another, and furthermore at the connecting link one end of this wasteful one Handlebar attacks, the other end of which with one actuation! lever is connected, on the drive shaft an iiraftantriebsarm is attached to which the position of the force attack ^ riffes for generating different üciiwenkwinkel the operating lever is adjustable for the changeover from double-sided single-color printing to single-sided double-colored printing «

With a device designed in this way, the offset cylinders are in the lift-off position out of contact with all other cylinders, so that the blankets can easily be replaced if necessary. The path of movement of the offset cylinder can also be a simple circular path and the adjustment of the offset cylinder to the lifting position can be achieved by pivoting the offset cylinder about axes which are spaced from the axes of the plate cylinder. In contrast to the aforementioned known as machine but the trajectory of the offset cylinder contains three settings from which the av-ere setting without any complication of the change-over lifting the offset cylinder of the plate cylinders and impression cylinder and a lightweight training

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change the blankets again »

The invention thus creates a device of simple design on a rotary printing machine, in particular an offset printing machine, which can be manufactured without great effort, which device enables the printing machine to be adapted to a high degree to the respective requirements. A cumbersome change in the guide path of the paper web and the additional arrangement of a rubber blanket or corresponding .Belages on a third cylinder are avoided. The device can also be designed in a simple manner so that the connecting link of the eccentric bushes of the two offset cylinders and the operating lever connected to it form a .knie lever linkage that assumes a dead center position as soon as the offset cylinder or the corresponding cylinder is in the has brought an operating mode or the other operating mode corresponding egg position, and thereby ensured an effective locking for each operating mode. There is still the advantageous possibility that the offset cylinder or corresponding cylinder with large. Accuracy can be set in the required operating position relative to one another and to the printing cylinder without this setting being changed by operating the device when the machine is switched from one operating mode to the other, _{or the like}

The invention is based on the in the drawing embodiment illustrated as an example.

In the drawing show:

1 shows a schematic end view of a rotary offset printing machine with the offset cylinders in pressure contact with a paper web for single-color printing on both sides;

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Fi ;;. la is a partial view of the formed according to the invention Device for changing over the offset cylinders, these assuming their mutual position according to 1;

Fig. 2 is a schematic end view of all cylinders of the tables Machine, with the offset cylinder one between their take up the middle position of both operating units, in which they are out of contact with the other cylinders;

PI·;.:. 2a one of the iJ'ig. la corresponding partial view of the device for converting the offset cylinder, the offset cylinder according to the central or lift-off position. * 'ig. Take 2;

Figure 2b is a partial sectional _t na-jh line 2b-2b of Fi,;. 2a;

Fi _f;. 3, one of ^r ig. 2 corresponding: bottom view, in which, however, the offset cylinders for the implementation of one-sided two-color printing are in printing contact with the printing cylinder;

3a shows a partial view of the device corresponding to FIGS. La and 2a when the 0 ± ^v f setting cylinder is set according to * Hg. 35

FIG. K shows a partial section along the line hk of FIG. La with a zenterbüclis ;; for the storage of one iJides of a (j ^ f set cylinder s;

Fig. 5 «iineji partial section along the line:> - 5 of Fig. La, which shows the formation of a hollow yuer shaft;

6 shows one of the offset cylinders in schematic form; table end view, in the ax displacement of the longitudinal center axis of the

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Offset cylinder and the location of the adjacent cylinders are shown is;

¹ pig. 7 shows the mutual engagement of the drive gears of the machine with single-color printing on both sides in diagrammatic - "- nsictit, and

Fig. 8, also in a perspective view, the engagement of the drive gears with one-sided two-color printing.

The rotary offset printing machine shown in Fig. 1 has a machine frame 10, in one half of which a plate cylinder 11 with a reversible direction of rotation is mounted, which carries a set of thin printing plates (not shown) Registration mechanisms can correspond to US patent specification 3 093 811. For applying a film of printing ink or printing ink to the 1-plate cylinder 11, an ink container 12 and several ink transfer rollers 13 are arranged, of which the printing ink is in rolling contact with the printing plates of the plate cylinder 11 stationary inking rollers Ik is supplied to the printing plates ₀ iiinige the ink transfer rollers and ink rollers can optionally be designed as a T. to dampen the j-lath-

cylinder 11 b ^ IT ^ eTner ^^ turn clockwise iHt a Water tank I5 with Vanner transfer roller l6 and one Water application roller 17 attached. When making the plate cylinder Anti-clockwise, the humidification takes place from the dashed-dotted water container. 2Q from over the ti.bertragungswalze 21 and the wass ^ eFSljf 22e The color film adheres to the ^ in this arrangement circumferential area of the] slat cylinder used for printing, while the water film covers this peripheral area after printing moistened, whereby the water and the color are constantly renewed during normal operation of the printing machine »»

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In the other half of the machine frame is a mirror image of your plate cylinder 11, a llattenzylinder 11a with a corresponding ink fountain 12a, 13 ^a and a ßei'euchtuii ^ svorriciitung 15 «* j 16a, 17a disposed. A second moistening device is not necessary here, since the plate cylinder 11a always only rotates in one direction, even if the rotation is reversed for ilen plate cylinder 11 and the machine is not operated as an offset printing machine, but as an ordinary iruclciii machine _o

For transferring the print image during offset printing from the Plate cylinders 11, 11a on a paper web 30 running through the machine are in mutual contact and in touch offset or rubber tuclizyl Indians standing with the plate cylinders J) I and 32 arranged, these offset cylinders are respectively on an arc of short length between a first end b;: w. Division of the company Printing on the paper web 30 with the associated plate cylinders and in contact with one another via the paper web are, as well as a middle position in which they are one of the Pia solder cylinders in the direction of the circular arc and in the radial direction seal separate lift-off position, and a second iünd- or operating position pivotable, in which they with the Plate cylinders and a common impression cylinder 33 in Are touch and the return image one after the other Side of a paper web that runs around the impression cylinder Two-sided printing, in which the two sides of the paper web are printed simultaneously, or in -u'inseitendi-ncky in which, as is known for multi-color printing, only one side of the paper web is printed in succession, operated be, the offset cylinder in the central or / wiper position assume a lift-off position in which they from the plate cylinders 11, 11a and the impression cylinder 33 picked up automatically. The pressure cylinder 33 is for this purpose

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arranged close to the plate cylinders 3I and 32 and in the middle of the ocheitelraunies 34 ordering between them. If the printing machine is operated in one-sided two-color printing, in which the offset cylinders are in contact with the printing cylinder 33, the dashed ii © is shown paper web 35. led around the printing cylinder 33.

To change the position or to change the offset cylinder 31 »32 is each of the same boxes of the illustrated embodiment stored in two eccentric bushes on each oeite of the machine frame connected to a Kriiehebelges Lünje are and by means of this linkage in an aurch stops precisely determined angular position are rotatable. The toggle linkage are designed the same on each side of the machine frame and below for one side with the Eccentric bushes described on the basis of i'ig, la «

The eccentric bushing 4o has a cylindrical outer surface 4l and is inserted with this into a corresponding opening in the machine frame, see “Pig. 4. At the likewise cylindrical inner face 42 of the bushing is arranged a rolling bearing lenstunipfes VEI for mounting a mounted at the end of the offset cylinder 43 »The sleeve 4ü is secured against axial movement by a retaining member 44 which engages an outer flange of the ^above üchse and is attached to the machine frame by means of screws 46. To establish an exact threatening position of the eccentric bushing 4o when it is adjusted or turned clockwise for the operation of the machine in single-color printing on both sides, an adjustable stop 50 is arranged on an arm 51 of the machine handle, which is in the path of movement of an arcing element 52 of the bushing is used to determine the exact rotational position of the eccentric bushing when it is turned and rotated counterclockwise.

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Position tor the operation of the machine in the single-sided Zweifürbendruck nn same arm 51 of the machine frame a Anscnla ;, 55 mounted, which lies in the path of movement of a 4o attached to the Büfchse stop member 57, jjie eccentric kn is further provided with a radially projecting arm 5o, the to rotate the bushing from a central position "either clockwise or counterclockwise and through a pin 5'J " which is inserted into a hole in arm 58 parallel to the cylinder axis "is connected to the toggle linkage"

For mounting the other offset cylinder 32, an eccentric bushing 4 ° a, arranged in a mirror-inverted manner to the eccentric bushing kO , with ften identical parts, here designated with the additional letter a, is used.

D.-with the ^ xzenterbüchsen kO and 40a can be rotated at the same time by the same angle, but in the opposite direction of rotation, the toggle linkages, which are denoted with the general here, sz eichen üü, designed so that their parts simultaneously with the The impact of the stops of the bushes on the stop members of the machine frame in one or the other operating position of the operating cylinders assume the dead center position. For this purpose, each toggle linkage 6o has, according to FIG. 2a, a force application arm 61 and an actuating lever 62 coupled to it, which move inwardly with respect to a projection c> 3 attached to the machine frame. At the left end of the actuating lever 62 in Fig. 2a, an obs; n directed link 65 is articulated by means of a pin 6 ^, which is stranded to the left except uii ^ axif the right side with a tolur; -nzfeld 6ü. On the upper end of the handlebars, by means of a pin 67, there is a connecting link, which is provided with a golenkapfon 71, to which one end of a rod 72 is articulated. The latter is iii it its other iünde with the arm 58 of the eccentric bushing ko

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The connecting link 70 is also connected in a similar way to the arm 58a of the eccentric bushing 4üa if the actuating lever 62 is pivoted counterclockwise and pulls the upwardly directed link 65 into its lowest position, as shown in FIG. la is shown, both eccentric bushings 4o and 4oa are rotated inward until the stops 50 and 52 on the eccentric bushing 40 on the left in FIG. la and the corresponding stops 50a and 52a on the right eccentric bushing 4üa touch. As a result of the eccentricity of the sleeves 4o and 40a, this rotation causes an inward displacement of the two offset cylinders 3I, 32 towards one another, so that the longitudinal center axis of the cylinder 31 is at the point 75 and the longitudinal center axis of the cylinder 32 is at the point 75 ^ . In the lowest position of the vertical link 65 according to Fig. La licagen its arid at the ü-elenksteile 64 and 67 with the fixed axis of rotation 76 of the actuating lever 62 in alignment and form a bent back knee. This knee position with its great mechanical advantage serves to lock the stops 50 and 52 as well as 50a and 52a and to secure the position of the offset cylinders 31 and 32 in the position according to FIG .3 it is necessary to set the pressure once again. In order to prevent the link 65 from pivoting beyond its dead center position when the knee is bent back, an adjustable stop 81 is arranged on the projection 63 of the machine frame in the path of movement of an attachment surface 82 of the actuating lever 6Z . A corresponding stop 83 », which works together with a stop surface 84 of the actuating lever 62, limits the pivoting movement of the lever in the other direction.

The operating levers 62 and 62a on each side of the machine are pivoted according to FIG. 5 by means of a hollow shaft 90, which is rotatably mounted at each end in the machine frame

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and at its end located on the left in FIG. 5 it is connected by means of a wedge 91 to the actuating lever 62 and at its other end to the actuating lever 62a by means of a wedge 92. A drive shaft 93 is tightly fitted into the hollow shaft 90 and is connected to the hollow shaft 90 in the center thereof by a welding ring or in some other way.

To rotate the drive shaft 93 it is connected to the already mentioned force application arm oil by means of a wedge 96 and the force application sarni 61 by means of a pin 97 with a piston and cylinder device 100 (Fi ^ _1. La) to be actuated by a pressure medium Approach 103 of the machine frame is attached by means of a pivot pin 102 and with the toggle linkage !! 6ü on each side of the machine the adjusting device for "adjusting the offset cylinder 31, 3 ² forms, bainit for rotating the drive shaft 93 from a central position clockwise or counterclockwise a simple, double-acting piston and cylinder device 100 can be used, is the The position of the connecting pin 97 on the force application arm 61 can be changed. For this purpose, the pin 97 on the force application arm 61 can be displaced from one side to the other of the axis of rotation 76 of the drive shaft 93, so that in its one end position it generates a counterclockwise torque and in its other end Lei Lung transmits a clockwise rotating torque to the drive shaft 93. In the embodiment shown, a screw spindle Io5 is arranged for this displacement of the connecting pin 97 in the force application arm 61 provided with a window opening I06, which is connected by an internal screw thread of the Zapf us 97 passed through rt and at the lower end with a square, 1Q7, on which a rotary wrench can be placed. By simply turning the screw spindle using the square 107 and the wrench, sojjij; ₍ the connecting pin 97 from one end to the other of the window opening I06 and thus the point of application of the force from one side of the axis of rotation 76

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- 14 to be moved to the other side of the same «

Since the drive shaft 93 with the Hoiilwelle 90 in their lütte is connected, any rotation that the hoiil shaft 90 undergoes as the drive shaft rotates is uniformly applied to the two toggle linkages 6C: on the opposite sides of the machine transferred so that the toggle linkage work completely evenly, even if only a single piston and Cylinder device · 100 and only one low-pressure oil one machine side is arranged,

When the offset cylinder is to be pivoted 31 and 32 from the feezeigten in Fig. 1 Öetriebsberührung in the central bzw- lift-off according to Pig "2, the piston and cylinder device · lOO pressure medium is supplied for the purposes of ßinzlehens thereof, whereby the operating lever 62 rotated and the stops separated and the vertical link ö5 is raised into the middle position shown in Pig, 2a. The longitudinal central axes of the Oi fset cylinders move from their positions 75 and 75a to the new positions iod and loba. In this case, these cylinders not only move apart from one another, but also come out of contact with the associated plate cylinders. This is due to the fact that the radius of the pivoting movement, which is determined by the eccentricity of the ^ώ χζβΐ terbüchsen 4θ, 40a, is relatively small and the Scriwenkbewegung takes place around a center point which is a considerable distance from the axes of the plate cylinder 11, lla . like from tfig. 6 can be seen, the o ± "fset-

ylinder, while they are moved in the circumferential direction of the associated plate cylinder, at the same time moved outwards, although the offset cylinder is pivoted only by a small amount; this is therefore sufficient to cause a lift-off movement, which in practice is in the order of magnitude of about 1 millimeter. Through such a lifting motion of the \ pressure contact between the offset cylinders and the plate cylinders is canceled not only but the cylinders even _if; separated from one another that the printing plates and the rubber blankets ■

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- 15 can be replaced by the operator.

To ensure an equal rotational movement of the eccentric bushes 40 and 40a with a certain movement - f of the link 65, especially when moving the offset cylinder into the lift-off pitch, the pivot pin 71 is preferably guided on the machine frame. This can easily be achieved by means of a guide member 109 which is rotatably arranged on the pin 71 and which is guided in a vertical groove 109 of the machine, see FIG. 2b.

To pivot the offset cylinder beyond the lift-off position into the position required for the second operating mode of the machine, ie for one-sided two-color printing, in which the offset cylinders 31, 32 touch both the printing cylinder 33 and the associated plate cylinders 11 and 11a, the screw spindle 105 rotated so that the connecting pin 97 moves from such an upper position into the lower control ;; moves in the force application arm 61, see the dot-dash position in Fig. ^ a. Then the piston rod 101 of the piston and cylinder device 100 is pushed out, causing the force trigger 61 and the actuation oil 62 to be pivoted clockwise and the handlebar to its highest position corresponding to Fip. 3a is moved. In this position, the connecting links 70 and rods 72 are in alignment and in a dead-center knee position in which the stops 55 and 57 and 55a and 57 & rest against each other and precisely fixe liottriebssteliung the two eccentric bushings ho and k () a after the displacement set the longitudinal axes of the offset cylinder in the new operating position. In order that when several stops are arranged in the same Yex-äa 11 -device 6o the risk is avoided that the stops touch each other even with the most careful adjustment to different / ext, a stiff spring 85 is clamped between the connecting rod 72, and the attacks are so

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made ι that the stops on the bushes touch first The guide member 109 preferably has so much lateral play that the upper end of the link 65 can pivot freely to the right or to the left, depending on how it is necessary to assume a position of equilibrium, so that only one spring for the connecting links 70 and rods 72 is sufficient. The compensating spring 85 not only ensures the simultaneous contact of the stops, but also avoids excessive stress in the connecting links 70 and rods 72 as a result of the toggle action. The stops 83 and 84. on the actuating arm 62 prevent the link 65 from moving the toggle lever beyond the dead center. The displacement of the longitudinal axis of the offset cylinder 31 from the position 1θ8 to the new position 109 is shown in FIG 33 are pressed, a print image in two different colors can be generated on one side of the rapier web 35 that is guided around the printing cylinder.

In addition to the emergency for operation in one-sided two-color printing. In order to reverse the direction of rotation of the plate cylinder 11 and the offset cylinder 31, the switching of these two cylinders must be changed, while the plate cylinder 11a and the offset cylinder 32 maintain their direction of rotation Cylinders 11 and 31 represent a measure readily given to those skilled in the art, the switching of the gears for the two operating modes of the printing press is, for the sake of completeness, schematically in FIGS. 8 shown divided. In these figures, the gears assigned to the different cylinders have the same reference numerals as the cylinders, but are denoted by the additional symbol g LLAG, which is at the end of the plate cylinder lla arranged at ± and, in turn, with a gear 32g in mesh attached to the end of the Qffsetzylinders 32, "

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These gears normally only rotate in one direction of rotation The gear wheel 32g meshes with the gear wheel 31g »that in turn Gear wheel 11g at the end of the slat cylinder 11 drives. Since the Toothed wheels preferably have a helical toothing with left or right pitch, the reference symbols R are and L used to indicate the slope. In the case of the first operating mode shown in FIG. 7 or the operation on both sides The gears 33g-1 and 33g-2 are single-color printing, both of which are wedged onto the shaft stumps of the printing cylinder 33 are out of engagement with the other gears so that the printing cylinder does not rotate.

V / eiin to the second mode of operation, i.e. to one-sided Two-color printing, is passed over (i'ig. 8), so it will Gear 31g shifted on its stub shaft so that it except .Eingriff with the Zaiinrad 32g and in engagement with the Gear 33g-2 is coming. The corresponding gear 33g-l will on its stump in engagement with the gear wheel 32g postponed. The plate cylinder 11a and the offset cylinder 32, which are constantly in mesh with the input gear 110, rotate therefore in both operating modes in the same direction, while the offset cylinder 31 and the rod cylinder 11, because the drive of the offset cylinder 3I via a direction-changing Gear and not done directly by a gear, can be reversed in the direction of rotation. If the Plate cylinder 11 rotates in the reverse direction, so instead of the moistening device 15, the moistening device 2o used.

According to FIG. 3, an additional plate cylinder 120 and an additional offset or blanket cylinder 127 is arranged to provide the paper web with three-color printing on one side. The additional plate cylinder 120 j are a water receiving roller 121, a water transfer roller il22 and a water application roller 123 assigned to the plate cylinder moisten with the already mentioned direction of rotation

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However, if the paper web is in the opposite three-way direction runs around the pressure cylinder 33, the original vice versa and through the pins 124, 125 and 126 formed, dashed lightning device leihfciiiiiig · used. The additional rubber tue hzyl Indian 127 is between the plate cylinder 120 and the impression cylinder 33 are arranged. The drive connection for the l'lat lenzylinder 120 and the Guiiifliituchzylindor 127 is not shown, lie ^ t afeer oiane further in the area of professional ability «

From the above description it follows that through the device according to the invention a holie adjustment ability of a rotary printing press, especially one Rotary offset printing machine to different operating modes enables 1st and at the same time it is guaranteed that the ! Printing press from one mode of operation to the other operating mode can be changed · Take the Offset or rubber blanket cylinder 31 »32 for each of these operating modes their necessary location Biit Kolcäaer Accuracy that no or only a slight Nacia setting is necessary. Due to the new connection of the toggle linkage arranged on both sides of the machine 6o a single actuating device is sufficient to switch the machine. by means of which the eccentric bushes 4o, 4Oa for the Offset or blanket cylinders on both machines rarely;, exactly be rotated by the same angle of rotation «, as a result of by the invention made versatility possible can be produced economically and with significantly less effort than the usual color printing machines. Although tile tSrfl to enable two different operating modes ibe i a rotary offset printing machine is described, is the teaching the invention is not limited to such machines, but rather can be used wherever it is wünsdreaissreirt, a change in a system with two z, B. the cylinders 11

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and to carry out 31 ants, -reeilende cylinders, in which the second cylinder (corresponding to the cylinder 'Jl) lv' optionally in xJeiithruj · ;; "Ii t eiiicni third od-jv fourth 23 ^r linder (a; speaking -en cylinders 3 ^ and 33)" is to be done, iie both sytHttietrich on both sides of a plane containing the longitudinal axes of the first two cylinders 11 and 31: - n ^ eardiiet are, and in which the second cylinder 3I is separated or lifted off in a> _iti, el- or intermediate runii from a em third and fourth cylinder _o

In the ι · '!;. 1 and * J are two _Flnruü: .sarten for the illustrated to be printed ^ a ^ ierbahn. However, the paper web can also be guided in other ways. Z _o i3. the ir i'i ;;. 1 ^ -J shown I-aplerbahn 30, after it has been printed on both sides by the OiT-set cylinder 3I »32, be guided around the back cylinder 33, mn on one side of the paper web through ilen cylinder 127 of the l '^ ij ;. to print an additional color imprint in bssti; at.iten positions. Further <snn the Druckzylirnler 33 to Fi; V. 1 when operating the r-iasciiiije in two-sided single-color printing for: icii ajiye trie bei »und liierdurcn enoöfj'not be printed on one side by simply printing on the i'apierbalm 30 will. Finally, other combinations with paper towels that have been preprinted with one or more colors on one or both sides also make sense.

Pat entan sayings; BATH ORIGINAL

Claims (1)

H36532 - 20 new claims Io device on a rotary offset printing machine, those with two plate and two offset cylinders as well as one arranged symmetrically to the two offset cylinders Printing cylinder is equipped to convert the offset cylinder one that enables double-sided iSincolor printing Operating position in which the two offset cylinders are in contact with one another and on their plate cylinders, on one of the one-sided two-color printing corresponding operating position, in which the offset cylinder on their plate cylinders and abut against the printing cylinder, characterized in that the for moving the offset cylinder serving trajectory each of the two offset cylinders (31 »32) are curved in such a way that that each offset cylinder between the two operating positions (75> 109) in a lift-off position; is movable, in which the two offset cylinders of the plate cylinders and the Pressure cylinders are lifted » 2e device according to claim 1, characterized in that, in a known manner, the two offset cylinders (31, 32) are mounted in eccentric bushes (40, 4oa) and these are mounted by means of a connecting member (7θ) as well as on this and on the eccentric bushes ^ '' K), 4oa) articulated rods (? 2) are niixeinarider coupled, and that also on the connecting member (? O) one end of this pivoting link ((> 5) engages, the other end with an operating lever (62) is connected, on whose drive shaft (93) a Kraftantriebsartii ( ⁽⁾ l) is attached, on which the position of the force application "(97) for generating'vifferent Scnwenkwinkel the actuating lever (62) for the changeover from two-sided single-color printing to one-sided two-color printing adjustable is. 3. Device according to claims 1 and 2, characterized by stop members (50, 52, 50a, 52a; 55, 57r 55a, S09839 / 0027 ~ ²¹ ~ I BATH ■ H36532 57a) ι the two operating positions of the offset cylinder set as iündSteiittnß-üft. 4. farrictitung according to claim, 3 »characterized that the Aiisehlagglieder (50, 50a, 55 »55a) as adjustable Stops are formed, 5 · Device · according to claims 2 to 4, characterized in that the rod (6o) actuating the eccentric sleeves (4o, 4oa) to compensate for inaccuracies in the setting of the stops (50, 50a, ^ 5, 55a) has a Spring device (85) is installed. 6 * Device according to claims 1 to 5 »thereby characterized in that the pressure cylinder (33) and the one Offset cylinder (32 or »31) on both sides of the longitudinal axis the other offset cylinder and the associated one Plate cylinder (11 or 11a) containing iibene are arranged. The patent attorney 9098397002t - - BATH