DE8401569U1 - Inking unit for inking the plate of a plate cylinder of rotary printing machines - Google Patents

Description

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20.05.1988 - 8 -

Inking unit for inking the plate of a plate cylinder of rotary printing machines

The invention relates to an inking unit for inking the plate of a plate cylinder according to the preamble of claims I and 2.

When designing a so-called short inking unit, such as can be used for offset rotary printing machines, the problem is how to continuously feed a uniformly thin ink film of a few meters to the printing plate. "Uniformly" here means that the ink film is applied to the plate at a uniform thickness across the width of the printing plate, across the circumference of the plate cylinder and for the entire production period. In particular, producing and maintaining the low thickness of a few meters with a highly viscous ink is, in addition to freedom from stenciling, a basic requirement for the quality of a product produced on such a machine. Freedom from stenciling here means that the ink residual profile returning from the printing plate to the inking unit is not applied to the plate at a different circumference than the ink film that was fed in, so that the existing differences in the thickness of the new ink film become visible as partial color fluctuations in the printed image.

In a known design of a short inking unit (DE-OS 32 32 780), one or two form rollers are wound which have the same diameter as the platen under. This has the advantage that stenciling by these form rollers cannot occur in such a printing unit. In addition to this advantage, the known design also discloses;

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how the dampening solution is supplied in a simple manner and how contamination of the printing ink can be prevented when the paper is very dusty. A cleaning blade is proposed for this purpose, which serves to remove the dirt-carrying ink film. However, this known design does not reveal how the thin ink film is to be produced precisely in individual zones without a considerable amount of control technology being required for the zone-by-zone regulation of the amount of ink.

The well-known FR-PS I 401 718 does not show a plate cylinder-sized application roller for stencil-free work and therefore does not belong to the category of short inking units that work without stenciling. It deals with the production of a thin ink film without specifying a specific solution for this. Since this involves layer thicknesses of only a few micrometers of a highly viscous ink, the requirement for the geometric accuracy of the elements involved in the ink transport is high. The need to adjust the layer thickness of the ink film to a size that is optimal for printing, depending on the consistency and color strength, increases the difficulty. The geometric accuracy can, under certain circumstances, be achieved through considerable manufacturing effort. However, particular attention must be paid to the unavoidable deformations that occur as a result of the considerable forces when thin, highly viscous films pass through narrow places that are used to determine the layer thickness.

Taking the above problem into account, it is the object of the invention to design an inking unit without ink zones with a plate cylinder with a maximum of two ink application rollers of the same diameter, so that for stencil-free inking, the plate cylinder is provided with a uniform ink flow that is independent of the printing form and

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A thin ink film of constant thickness, unaffected by dirt, is transferred so that all solid areas preferably have the same density values. Uniform here means that the ink film of the printing plate is offered in the same layer thickness across its width and length and for the entire production period.

The problem can be solved with the features of the characterizing part of claim I, whereby the desired thin film of paint is primarily produced via a chain of paint rollers and the ink supply is not influenced by the doctoring off of the residual paint profile. It can be assumed that it is easier to doctor off a paint profile from a cylinder, especially if there is no requirement to remove all of the paint. This solution therefore offers the advantage of first producing a relatively thick film of paint, transferring it via a roller train and reducing it to such an extent that

J on an ink cylinder at the end of the roller train a thin There is an ink film that meets the needs of the printing plate.

f and that this colour film is stencil-free over

maximum of 2 application rollers fed to the plate cylinder

I. will.

., Claim &igr; describes the solution for an inking unit, whereby

This could, for example, be an inking unit for letterpress printing . The technical means described here for solving

f the task at hand enables a simple

thin color film with constant thickness by splitting the

'to produce paint between the ink rollers, whereby the previously

> - required control and technical effort can be eliminated.

The solution according to claim 2 makes it possible, using the same means, by varying the speed of a part of the roller train and by splitting the ink, to achieve the stated task in an advantageous manner with a simple structure of the inking unit.

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Claim 3 supplements the solutions according to claims I and with a dampening system/ so that their use is also possible in offset printing machines, whereby one of the most important requirements for an offset inking system is the freedom from stenciling. According to claim A, the roller train, which already rotates more slowly than the machine speed, is assigned a dosing roller with a small diameter^ which is driven at an even lower speed, so that a relatively thick/ even ink film is produced in a simple manner. According to claim 6, the speed of the slower rotating ink roller train can be adjusted/ in order to take into account the respective ink requirement of the printing plate.

The doctor blade device according to claim 10 also

a reduction in the color film thickness is possible/ whereby the.

The number of ink rollers can be reduced.

small metering roller according to claim 16 associated with larger

Support rollers enable a very uniform formation

of the ink film. By supporting the small metering roller via support bodies, according to claim 18, a uniform pressure and thus an equal ink film thickness can be achieved i

across the roll width, wherein according to claim 19, :

e.g. in case of defects on the printing plate also a partial I

Influence is possible, as is the case, for example, with < Lithography may be required. \

Claims 23 and 27 describe an easily replaceable, stably mounted doctor blade device that is easy to replace and has a smooth surface for easy cleaning. Claim 28 describes the only measure that is required when cleaning the inking unit, whereby a known detergent supply can be switched on at the same time. Independently of this, the detergent supply can be carried out separately at any point in the inking unit. The ink container can also be exchanged for another one to change the color.

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Claims 29 and 30 describe a color metering via a very large speed difference between the color cylinder and the color rollers/ where only a small number of color rollers is required.

The sub-claims not listed in detail represent advantageous embodiments of the subject matter of the invention and enable such a color unit to operate without problems in a simple manner.

An embodiment is shown schematically in the drawings

dargp&presents.

It shows:

fig< I a side view of an offset printing unit Fig«, 2 a roller diagram of a color dampening unit

Fig* 3 a roller diagram of an ink dampening system with another ink dosing device

Fig. 4 a roller diagram of an ink dampening system with" different ink dosage

Fig« 5 a modified roller scheme of a color dampening system

Fig. 6 is a roller diagram of a shortened inking unit Fig. 7 is a top view of a bearing of the metering roller

Fig. 8 a roller diagram of a modified ink dampening unit

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Fig» 9 a roller diagram of a modified color fireworks display

Fig. 10 a roller diagram of an inking unit with metering* and support roller.

The offset printing unit shown in Fig. 1 is intended for printing a paper web 1 which is passed between two rubber cylinders 2 and receives its imprint. The two rubber cylinders 2 work together in a known manner with a plate cylinder 3 and receive their imprint from them, which is then transferred to the paper web 1. All cylinders are mounted on both sides in the machine side frames 4 of the respective printing unit.

In the embodiment shown, the plate of each plate cylinder 3 is inked using an ink application roller 5/ which has the same diameter as the plate cylinder. Each ink application roller 5 is assigned an ink cylinder 6 which is inked by an inking unit 7 and moistened by a dampening unit 8.

In Fig. 2 and 3, the schematic structure of an inking unit according to the invention is shown enlarged, in which a metering device in the form of a metering bar 10 is assigned to a first inking roller 9, which continuously forms a relatively thick, uniform film of ink on the inking roller 9. The inking roller 9 is previously supplied with a large excess of ink from an ink container 12 by a scoop roller II.

After the dosing bar 10, the first ink roller 9 transfers the relatively thick ink film over several successive

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arranged ink rollers 13 - 20 on the ink cylinder 6. Due to the large number of gaps between the individual ink rollers, the ink film to be transferred is reduced to a fraction of its thickness. In this case, rubber ink rollers and friction rollers can alternate with the ink roller suit 13 - 20.

The dampening unit θ is provided after the ink roller 19, as seen in the direction of rotation of the ink cylinder 6, and its dampening solution film is applied to the thin ink layer already present on the ink cylinder 6. Both the dampening solution and the ink film are then transferred to the ink application roller S. After the ink film is split during the transfer process, part of the ink profile IS caused by the plate of the plate cylinder 3 is also transferred to the ink cylinder 6. This residual ink profile present here is removed from the outer surface of the ink cylinder 6 by a doctor device 21. The doctored ink 22 then reaches the ink container 12, in which a partition wall 23 can be provided between the new ink and the doctored ink.

r For special cases, the ink cylinder 6 can be

&iacgr; ^: · assign another ink roller 24 to the ink roller 16

|- rolls off.

The dampening unit 8 consists in a known manner of a dampening roller 26 immersed in the dampening fluid 25, a metering roller 27, a dampening solution application roller 28 and a friction roller 29 associated with the dampening solution.

Fig. 3 differs from the previous one in that

that a surface doctor blade 30 is provided on the first ink roller 9 instead of a metering bar 10, by means of which a relatively thick, uniform ink film is formed on the first ink roller 9. It is to be assumed here that.

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that the contact pressure of the surface doctor blade 30 is constant over the length of the first ink roller 9.

The flow diagram shows the functional relationship, whereby at the bottom left, excess ink is fed from the ink reservoir to the first ink roller, from which the ink metering device forms a thick film of ink. A thin film of ink is formed via several friction rollers and ink rollers arranged one after the other, which is then fed to the ink cylinder. In addition, dampening solution can optionally be transferred to the ink cylinder from a dampening system. The ink cylinder in turn feeds the ink.

Ink dampening solution film to the ink application roller (right |

below), which then inks the printing plate. The color profile returning from | here is removed from a doctor blade on the ink cylinder and, if desired, the

colour is returned to the storage container. The largely |

The shiny surface of the ink cylinder then represents the |

Recording of the thin color film and optionally the wet f

by means of without stencil effects. f

I' The design of an inking unit shown in Fig. 4 | corresponds in the structure of the ink rollers to a large extent with the previously | described designs. The difference consists essentially in the fact that the first ink roller 9 is | provided with a scoop roller 11 with ^!

umfangannuten 31. In addition, the first « ink roller 9 is assigned a metering roller 32 with a small diameter, which rests against the first ink roller 9 with uniform pressure via pressure cylinder 33 and pivot bearing 34. The pivot bearing 34 can be rotated on a

30 Traverse 35 stored.

Preferably, the dosing roller 32 can be driven at a lower speed than the original ink roller 9, so that a sensitive dosing of the thicker ink film is possible.

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Both the first ink roller 9 and the metering roller 32 can be designed with a rigid outer surface, whereby the metering roller 32 can be driven in the opposite direction of rotation to the first ink roller 9. The drive is advantageously carried out at a lower peripheral speed, but one that is dependent on the machine speed. It is advantageous to make this speed adjustable in order to regulate the ink film thickness. Another possibility for regulating the ink film thickness is by changing the distance between the metering roller 32 and the first ink roller 9, whereby this adjustment can be made via the pressure cylinder 33.

In the embodiment shown, the ink roller 14 is assigned a further doctor device 36 which, viewed in the direction of rotation of the ink roller, engages the outer surface of the ink roller 14 after the ink has been delivered to the next ink roller 15. This makes it possible to doctor the ink film split between the rollers 14 and 15 from the ink roller 14 so that the amount of ink supplied to the ink cylinder 6 is approximately halved. In practice, it is therefore possible to supply a thicker ink film to the first ink roller 9 via the metering roller 32. The doctored ink is then supplied to the ink container 12 via a guide plate 37.

In the embodiment according to Fig. 5, the ink roller 19 is pivoted away from the ink roller 18 and only rests against the ink cylinder 6. Here, it improves the color balance. In addition, a further friction roller 38 is assigned to the ink cylinder 6, which additionally works the applied dampening solution into the ink film.

In the embodiment shown, the doe roller 32 is pressed against the first ink roller 9 by two support rollers 39, 40, whereby both support rollers can be provided with annular grooves 41. Both support rollers are supported by a bearing

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body 42 and via pressure cylinder 43, whereby the lower support roller 40 simultaneously dips into the dye supply and acts as a cresting roller.

In this embodiment, the paint 22 scraped off by the doctor device 21 is collected in a separate container 44 and from there fed to a processing device 45, which can, for example, remove the water or dirt from the paint. The processed paint is then fed to the paint container 12.

In the shortened roller train according to Fig. 6, for example, a speed difference, i.e. a slip, is provided between the ink rollers 14 and 15. The ink roller 15 with the following roller 20 and the ink cylinder 6 is driven at the peripheral speed of the plate cylinder 3 or the ink application roller 5. The first part of the roller train, which in the embodiment shown consists of the ink rollers 9, 13 and 14, is driven at a peripheral speed that is lower than the machine speed. The slip between the two ink rollers 14 and 15 reduces the thickness of the ink layer on the ink roller 15, so that the ink film applied to the ink cylinder 6 again transfers the low ink film thickness of approx. 5 µm required for printing. The first part 9, 13, 14 of the ink roller train can, in contrast, supply a relatively thicker ink film.

The metering roller 46 shown in this embodiment forms the ink film on the first ink roller 9 and can be driven at a further reduced speed in relation to the first ink roller 9. The speed levels within the roller train allow a reduction in the ink film thickness from a relatively thick film on the first ink roller 9 to the required thin ink film on the ink cylinder 6 to be achieved under

rs«

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Use of a smaller number of ink rollers. Instead of a large number of gaps, speed differences are used in a shortened roller train to reduce the ink film thickness.

To press the small metering roller 46 onto the first ink roller 9, several support bodies 49 are provided along its length, pressed against it with equal pressure. The support bodies 49 have a bearing surface for the small metering roller 46, which is divided along its length by several oblique grooves 50. This ensures lubrication of the sliding surface of the small metering roller 46 and also balances the ink supply 47 within the ink container 48.

The ink container 48 is mounted on a slotted plate 51 so that it can be moved longitudinally, beneath which rocker arms 52 are provided, which use adjusting cylinders 53 to lift certain sections of the plate 51 and thus the support bodies 49 provided above it. This makes it possible to press the small metering roller in certain areas with the same pressure or, for example, with different pressure during lithography. The adjusting cylinders 53 and the rocker arms 52 are attached to a cross member 54, so that stable support for the support bodies 49 and thus for the small metering roller 46 is ensured.

The doctor blade device shown in Fig. 6 is mounted in a tubular body 55, which is pivotably mounted in the side frames 4 via adjusting means not shown, e.g. pneumatic cylinders. Two clamping rails 56 are provided inside the tubular body, between which the doctor blade 57 is clamped between two support plates 58. The support plates with the doctor blade penetrate a slot 59, which is arranged in the longitudinal direction in the tubular body 55. When the tubular body is pivoted,

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Thus, the doctor blade with the two slotted plates is positioned more or less against the ink cylinder 6, so that the elastic doctor blade 57 scrapes off the ink residue profile from the ink cylinder 6. The scraped-off ink drips

S directly into the paint container 41. This is achieved by a drip strip 60 on the lower support plate 58, which is provided close to the edge of the squeegee. If, for example, the squeegee blade 57 is to be reground, this design makes it possible to push the squeegee blade 57, which is completely clamped in the tensioning rails 56, axially out of the tubular body 55 without any major assembly work being required. After grinding the squeegee blade, the squeegee device can be reassembled in the reverse manner, whereby the advantageous design of the squeegee blade enables the squeegee device to be reassembled in the reverse manner.

So that contamination by ink is largely avoided. &iacgr; This also applies to the adjusting means for the metering roller 46 provided outside the ink fountain 48 I.

To interrupt the ink supply and to clean the inking unit, the ink container 48 can be moved outwards by a certain amount (shown in dash-dotted lines) together with the metering roller 46 and the support bodies 49. If cleaning fluid is applied to a certain point on the inking unit in the retracted position of the ink container 48, the ink dissolved by the detergent is scraped off by the doctor blade 57 and drips into a tray 61, which with its collecting plate 62 reaches close to the inking cylinder 6. After cleaning the inking unit, the ink container only has to be moved back into its working position and the printing press can start production.

Figure 7 shows the small metering roller 46 with the support bodies 49 provided in some areas and the inclined grooves 50 provided therein. The metering roller 46 is rotatably mounted on the ink container 48 via a bearing 63 and is driven by a spur gear 46 with a low peripheral speed.

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driven.

The embodiment shown in Figure 8 differs from those previously described in that the roller train in front of the ink cylinder only comprises two ink rollers 2C and 65. In this embodiment, the first ink roller 65 dips into the ink container 12 and takes over the ink. A small metering roller 66 forms a relatively thick ink film on the first ink roller 65, whereby the metering roller 66 is pressed by adjusting means 67 via tongues 68 that are attached to a rail 69. In this embodiment, the rollers of the ink roller train, including the last ink roller 20, are driven at a significantly lower speed than the ink cylinder 6, so that the relatively thick ink film present on the roller train is split into a thin ink film by the high speed difference of approximately 1:10. This is then fed in the manner described from the ink cylinder 6 via the applicator roller 5 to the printing plate of the plate cylinder 3. To even out the relatively thick ink film, a so-called rider roller 70 can be provided on the first ink roller 65.

Compared to Figure 8, the embodiment according to Figure 9 differs in that the first ink roller 71 is followed by the ink rollers 72 and 73, which interact with the ink roller 20 and transfer the ink to the ink cylinder 6. Here too, the roller train runs a certain amount slower than the ink cylinder 6, whereby the speed difference between the ink roller 20 and the ink cylinder 6 does not have to be as great as in the previously shown embodiment. The difference is that the ink flowing back is scraped off the ink roller 73 by the ink doctor blade 36, whereby the ink film that is transferred to the ink roller 20 is already about half as thin. Accordingly,

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chef.d the difference in the peripheral speed must be only about 1:5.

In this version, a scoop roller 74 dips into the paint container 12 and conveys the paint onto the small metering roller 66/, whereby the scoop roller is provided with annular grooves 75. The metering of the paint takes place in the manner described between the small metering roller 66 and the first paint roller 71.

Figure 10 shows a slightly modified version of Figure 9.

Ink metering device in which the dosing roller 66 is arranged on the center between the first ink roller 71 and the scoop roller 74. In this embodiment, the scoop roller 74 and the dosing roller 66 are driven at a reduced speed compared to the first ink roller 71.

The scoop roller 74 and the metering roller 66 can also be adjusted relative to the first ink roller 71 using the adjusting screws 76. For this purpose, the pin 77 of the scoop roller 74 is mounted in a sliding bearing 78, which in turn is attached to the machine side frames 4. In order to influence the ink distribution over the length of the first ink roller 71, the metering roller 66 can be interlocked in a sliding bearing 79 using adjusting screws 80, so that more ink is transferred to the roller ends. The first ink roller 71 can be designed with an elastic dumbbell surface and the metering roller 66 with a rigid dumbbell surface.

From the large number of exemplary embodiments it can be seen that the invention can be applied to any printing unit concept while retaining the described advantages, whereby the gradual reduction of the ink film thickness to the thickness required on the plate cylinder is always ensured without the need for complex and expensive control technology.

Claims (1)

20.05.L988 EXPECTATIONS 1. Inking unit for inking the plate of a Plate cylinder of rotary printing machines with an ink supply without ink zones, which has a maximum of two ink form rollers of the same diameter assigned to the plate cylinder, to which an ink cylinder is assigned, . ... characterized in that the first ink roller (9) of the ink roller train is assigned a metering device (10) which forms a continuous, uniform, relatively thick ink film independent of the ink requirement of the printing form, that an ink train consisting of several ink rollers (13-20) is provided which connects the first ink roller (9) to the ink cylinder (6), and that the ink cylinder (6) at the end of the ink roller train, viewed in the direction of rotation, before the ink is supplied by the ink train and after the ink is transferred to the application rollers (5), is assigned a doctor device (21) which removes the ink residue profile transferred by the plate cylinder (3). 2. Inking unit for inking the plate of a plate cylinder of rotary printing machines with an ink supply without ink zones, which has a maximum of two inking rollers of the same diameter assigned to the plate cylinder, to which an inking cylinder is assigned, characterized in that the first ink roller (9) of the ink roller train is assigned a metering device (46-54) that forms a continuous, uniform, relatively thick ink film that is independent of the ink requirement of the printing form, that the first ink roller (9>) is rotated more slowly than with Misc hin speed is driven, HEEOELBERG ZA-SS?" 20.05.1988 that a roller train is provided connecting the first ink roller (9) to the ink cylinder (6) and consisting of several ink rollers (13,14,15,19,20), that the first part of the roller train (13, 14) is driven at the speed of the first ink roller (9) and the last part of the roller train (15, 19, 20) in the direction of transport of the ink is already driven at machine speed, and that the ink cylinder (6) rotating at machine speed, at the end of the ink roller train as seen in the direction of rotation, is assigned a doctor device (55-60) which removes the ink residue profile transferred back from the plate cylinder before the ink is supplied by the roller train and after the ink is transferred to the application rollers (5) (Fig. 6). 3. Inking unit according to claim I and 2, characterized in that the inking cylinder (6), viewed in the direction of rotation, is assigned a dampening unit (8) after the ink supply by the roller train and before the ink transfer to the application rollers (5). 4. Inking unit according to claim I and 2, characterized in that the first inking roller (9) of the roller train is assigned a metering roller (32, 46) with a small diameter, which bears against the first inking roller (9) with uniform pressure and can be driven at a lower speed than the latter. 5. Ink unit according to claim I and 2, characterized in that the first ink roller (9) and the metering roller (32,46) are designed with a rigid outer surface, whereby the metering roller (32,46) rotates in the opposite direction e · /A-387 20.05.1983 and driven at a lower peripheral speed than the first inking roller (9) depending on the machine speed. 6« Inking unit according to claim I and 2, characterized in that the inking rollers (9, 13, 14) provided after the metering device (46) and before the last old machine speed rotating friction roller (IS) can be driven at an adjustable lower speed than the respective machine speed (Fig. 6). 7. Inking unit according to claim 1 and 2* characterized in that the distance between the first inking roller (9) and the metering roller (32,46) can be adjusted to a specific ink film thickness. 8. Inking unit according to claim I and 2, characterized in that the metering roller (46) dips into the ink (47) present in the ink fountain (48) (Fig. 6). 9. Inking unit according to claim I and 2, characterized in that the first inking roller (9) is assigned a scoop roller (U) which dips into the inking supply (12) and has several annular grooves (3D) on its circumference at a certain distance. LO. Inking unit according to claim I and 2, characterized in that an ink roller (14, 73) of the ink roller train is assigned a further doctor device (36) which, viewed in the direction of rotation, after the ink has been delivered to the next ink roller (15, 20) engages the outer surface of the latter (Fig. 4 and 9). &bull;·&diams;*· m HEIDELBERG /a-38? " "·· , &Lgr;&Lgr; ^ &Lgr;&Lgr; ^ &Lgr; m^~m^Λ. &Lgr;&Lgr; 20.05.1988 - 4 - Ll. Inking unit according to claim I and 2, characterized in that the first ink roller (9/650) is assigned a metering device, the metering surface of which is elastically adjustable, and that the metering device has a. Roller (32/46.66) with small diameter/ the with even pressure on the first ink roller (9.65). 12. Inking unit according to claim I and 2,
characterized in that the first ink roller (9/65) is designed with a rigid outer surface and that an elastic "metering roller" (32/46/66) can be placed on this, wherein the metering roller can be driven in the opposite direction of rotation and at different peripheral speeds. 13. Inking unit according to claim I and Z,
characterized in that the first ink roller (9) is designed with an elastic outer surface, that a rigid metering roller (9*) can be placed on this and that the metering roller is mounted so as to be interlocked with respect to the first ink roller (Fig. I). 14. Inking unit according to claim I and Z,
characterized in that the first ink roller (9>) is designed with an elastic outer surface and that a metering roller (9*) with the same diameter and rigid outer surface can be adjusted, the distance between the ink roller and the metering roller being adjustable to a certain ink film thickness (Fig. I). /A-387 20.05.1988 15. inking unit according to claim 1 and 2, characterized in that the metering roller (66) is mounted so as to be inclined relative to the first inking roller (71) and, '.. a support roller (74) immersed in the ink supply, which is adjustable towards the first ink roller (Fig. 10). ' / 16. Inking unit according to claim 1 and 2, characterized in that the metering roller (32) is designed with a very small diameter and is supported by two larger support rollers (39/40) (Fig. 5). 17« Inking unit according to claims I and Z, characterized in that the two support rollers (39/40) have a plurality of annular grooves (41) on their circumferences and the lower support roller (40) dips into the ink supply. 18. Inking unit according to claim I and 2, characterized in that the outer surface of the metering roller (46) is supported over its length by several support bodies (49) pressed with the same pressure (Fig. 6). 19. Inking unit according to claim I and Z, characterized in that the metering roller (46) is designed with a very small diameter and the supporting bodies (49) can be pressed against in certain areas with different pressures. 20. Inking unit according to claim 1 and 2, characterized in that the support bodies (49) have a plurality of oblique grooves (50) on their support surface and the adjusting means (51-53) for the support bodies (49) are arranged outside the ink fountain (48). /A-387 ··"··· * ^# '··' ·· 20.05.1988 21. Ink unit according to claim 1 and 2, characterized in that the small metering roller (46) can be moved to the first ink roller (9) by means of pneumatically actuated cylinders (S3) via the impact bodies (49). 22« Inking unit according to claims I and Z, characterized in that the first inking roller (9) and the friction roller (IS) driven at machine speed are connected to a tepid circuit and can be adjusted to different temperatures. 23. Inking unit according to claim 1 and 1, characterized in that the ink cylinder (6) with a rigid outer surface is assigned a doctor device with an elastic doctor blade, which doctor removes the residual ink profile transferred back from the plate cylinder and supplies the doctored ink to the ink container. Inking unit according to claim 1/2,3 and 21, characterized in that the paint removed by the doctor device (21,55-60) can be fed into the paint container and a partition wall (23) can be inserted between the doctored paint and the fresh paint. 25. Inking unit according to claim 13, characterized in that the doctored-off ink is first fed to a processing device (45) and then to the ink container (12). /A-587 20.05.1988 26. Inking unit according to claim 2,
characterized in that one or more friction rollers (38) are assigned to the ink cylinder (6), viewed in the direction of rotation thereof, after the dampening unit (C8). 27. Inking unit according to claim 1, 2 and 13, characterized in that the doctor device consists of a pivotable tubular body (55) with internal clamping rails (56) for the doctor blade (57), the doctor blade (57) with its support strips (58) being guided in a longitudinal slot (59) provided in the tubular body (55) in such a way that the complete doctor blade clamped in the clamping rails can be moved axially out of the tubular body (55) (Fig. 6). 28. Inking unit according to claim I and 2, characterized in that the ink container (48) is mounted together with the metering roller (46) so as to be displaceable by a certain amount in order to interrupt the ink supply and to clean the inking unit (7), and that a trough (61) is provided below the ink container (48) with which the ink removed by the doctor blade (57) and dissolved by the washing agent is collected (Fig. 6). 29. Inking unit according to claim I and 2, characterized in that the last inking roller (20) of the inking roller train is driven at a speed that is significantly lower than that of the inking cylinder (6) (Fig. β and 9). Iff · * &diams;······ Il