EP2072251B1 - Dampening system - Google Patents

Abstract

Process for controlling a first roller (04) which takes up a damping agent from a damping agent reservoir, and a second roller (06) comprises transferring transfer the agent from the rollers to a cylinder (09) of a printing machine. The rollers have separate motors (07, 08) and both the rollers differ from one another in their surface velocities effected by the motors. A change in the surface velocity of cylinder results in a change in the slip between the rollers. An independent claim is also include for a damping system. Preferred Features: The slip between the rollers is adjusted depending on the property of the ink printed by the cylinder. Both rollers are controlled independently of a surface velocity of the cylinder.

Description

The invention relates to a dampening unit according to the preamble of claim 1.

By the US 3,168,037 a dampening unit is known in which either a fountain solution from a fountain solution receiving dipping roller or a rolling on the dipping roller transfer roller are driven by a controllable drive such that a rotational speed of these two rollers, although variable, that the rotational speed of these two rollers is always the same amount ,

By the US 3,986,452 a dampening unit is known in which a dampening solution from a fountain solution receiving immersion roller and at least one standing with the fountain roller in rolling contact another roller each have an independent controllable drive, said further roller is in rolling contact with an employee of a forme dampening form roller, wherein an iridescent bridge roller is set against the dampening roller.

By the EP 0 893 251 A2 is a dampening unit with a fountain solution from a fountain solution receiving dipping roller and a roll rolling on the dipping roller known, both rollers may be required by separate drive means driven, both rollers but always have the same surface speed.

By the EP 0 462 490 A1 a film dampening unit for rotary printing machines is known, wherein in a dampening of the fountain fountain box to the forme cylinder of three or four rollers a fountain roller and a metering roller by a first Electric motor are driven together, wherein one of the metering roller in the roller compactor subsequent wet rubbing roller is additionally axially reciprocated by a mechanism and wherein a bridging roll is employed on a dampening roller applied to the dampening roller and the forme cylinder.

By the DE 29 32 105 C2 is a dampening of a rotary offset printing machine known, the dampening of the dampening solution up to the forme cylinder has a three-roller compactor and each of the three rollers is independently driven by a preferably continuously adjustable, controllable electric motor.

By the DE 38 32 527 C2 a drive device for the dampening unit of an offset printing machine is known, wherein an employee employed at the same time to a dampening roller and an inking roller iridescent bridge roller is provided, wherein the bridge roller is pneumatically driven, their speed is controlled by a change in the pneumatic pressure.

By the DE 299 00 216 U1 a dampening unit is known for a printing press, wherein a first roller receiving a fountain solution and a first roller in dampening transfer connection second roller are provided, both rollers are rotationally driven and wherein the operation of the dampening unit between the two rollers is a controllable slip control by control means ,

By the WO 03/039873 A1 drives of a printing unit are known, wherein the rotary drive and the traversing drive of a roller are arranged at their opposite ends.

By the JP-A-01 232 045 is a dampening of a rotary offset printing machine known, the dampening unit of the dampening solution up to the forme cylinder a three-roller compactor and wherein both the dipping roller (1st roller) and the transfer roller (2nd roller) are independently driven by a more controllable motor.

The invention has for its object to provide a dampening unit.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular in that the fountain roller and an adjacent wet transfer roller can be controlled completely independently. The slip formed between them due to a desired difference in their surface speed is adjusted as needed for a correct dosage of a fountain solution to be applied to the rollers. The adaptation of the slip takes place in particular as a function of a change in the surface speed of the forme cylinder.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

ein Feuchtwerk mit vier Walzen im Walzenzug zum Formzylinder;

Fig. 2

ein Feuchtwerk mit drei Walzen im Walzenzug zum Formzylinder.

Show it

Fig. 1

a dampening unit with four rolls in the compactor to form cylinder;

Fig. 2

a dampening unit with three rollers in the compactor to form cylinder.

The Fig. 1 and 2 each show in a schematic representation of a dampening unit 01, preferably a film dampening unit 01, with a first roller 04 and a second roller 06, wherein the first roller 04 a fountain solution 02, z. As water 02 or an alcohol-water mixture 02 from a fountain solution source 03, z. B. from a fountain solution 03, in particular from a fountain solution box 03 or from a with the fountain solution 02 filled tub 03 receives, wherein the first roller 04, the fountain solution 02 at least partially transmits directly to the first roller 04 adjacent arranged second roller 06. The first roller 04 is thus preferably designed as a dip roller 04 or as a ductor roller 04. Alternatively, the fountain solution source 03 z. B. be formed as a spray bar 03 with at least one of the fountain solution 02 on the first roller 04 spray nozzle 03, wherein the fountain solution 02 is applied in the form of finely divided droplets on the first roller 04. Further embodiments provide for the dampening unit 01 to be designed as a brush dampening unit or as a rotary dampening unit, in which the dampening solution 02 is likewise applied contactlessly to the first roller 04. The second roller 06 may be a metering roller 06, a wet transfer roller 06 or a friction roller 06, each preferably with a chromed or coated with a ceramic surface. The first roller 04 is the first of a plurality of rollers in a compactor over which the dampening solution 02 is transported from the dampening solution reservoir 03 to that forme cylinder 09 of a printing press operating in offset printing, to which the dampening unit 01 is assigned. The in the Fig. 1 and 2 differ in particular in the number of their rollers arranged in the compactor.

The printing machine is z. B. formed as a commercial printing press. Your printing unit has at least one forme cylinder 09 and a transfer cylinder (not shown), these two cylinders roll on each other. A commercial press, preferably an offset press, is intended to mean a printing press with a forme cylinder 09 in which only one single printing form is arranged on its forme cylinder 09, wherein the printing forme preferably has a plurality of print image positions in the axial direction to the forme cylinder 09 , wherein the print image areas are free of a predetermined format, ie, in particular in the axial direction to the forme cylinder 09 within certain limits may have any width.

Dampening 01, which use a fountain solution 02, the z. B. to reduce environmental pollution or to reduce its costs preferably no or at least very little alcohol, especially isopropyl alcohol (IPA), is added by well below 5% of the volume of the dampening solution 02 total added substances require during production of the printing press , d. H. in their printing operation, for a good printing result, a very precisely adapted to the respective production speed adjustment of the forme cylinder 09 to be transported amount of dampening solution 02. To make matters worse, that for the printing machine an ever higher production speed can be realized. Today's printing presses achieve a production speed of quite 70,000 to 80,000 revolutions per hour for their printing cylinder. If the diameters of the transfer cylinders and forme cylinders 09, which are operatively connected to one another, are identical, the production speed of the printing machine corresponds to the surface speed v09 of the forme cylinder 09. The dampening unit 01 with the features described below provides for the transport of a sufficient and precisely edible quantity even for such a high production speed to dampening solution 02 safe.

Furthermore, the amount of dampening solution 02 required on the forme cylinder 09 for a good printing result depends on the emulsifying behavior of the ink used and on the quantity of ink required to produce the printed product. The paint and the fountain solution 02 form a mixture, wherein depending on the nature of the color in the color within certain limits variable volumetric proportion of the fountain solution 02 is intermingled. The backfilled into the dampening unit 01 color, the fountain solution 02 z. B. in a proportion of between 15% and 25% record. The proportion increases with increasing surface velocity v09 of the forme cylinder 09. However, the proportion of the emulsified by the ink fountain solution 02 is z. B. also set an upper limit that the on a substrate, z. As a paper web, printed color during the passage of the Substrate by a printing unit downstream drying unit, z. B. a heatset dryer, still dry safely. Due to the desired high production speed of 12 m / s or more, the residence time of the printing material in the drying unit is very short.

The more colored print image areas a printed product has, the more color is required on the forme cylinder 09. Consequently, in such a case, in order to set a balance of ink and dampening solution 02 required for printing, a larger amount of dampening solution 02 must also be provided on the forme cylinder 09 when the printing press produces a color-intensive printed product. The dampening unit 01 with the features described below therefore adapts the amount of dampening solution 02 provided on the forme cylinder 09 for a good printing result, also depending on the nature of the color and its quantitative requirement for the printed product to be produced.

In order to enable a needs-based adjustment of the amount of fountain solution 02 provided on the forme cylinder 09 as a function of the production speed of the printing press and the equilibrium of ink and fountain solution 02 to be set, the first roller 04 and the second roller 06 have separate, ie independently controllable, drive devices 07 ; 08 on. Independently controllable drive devices 07; 08 for the first roller 04 and the second roller 06 have the advantage that a surface speed v04 of the first roller 04 generated by the drive device 07 and a surface speed v06 of the second roller 06 generated by the drive device 08 does not rigidly change the amount of dampening solution 02 influencing parameter follows, but that for adjusting the amount to be transported of the fountain solution 02 and the ratio of the surface velocities v04; v06 can be adjusted to each other variable and needs-based, whereby the dosage of the moisturizer 02 to be transported by the dampening unit 01 significantly influenced becomes. Depending on the currently existing printing process, different settings for the surface speed v04 of the first roller 04 and the surface speed v06 of the second roller 06 and for their relationship to one another may result for the same value for the surface speed v09 of the forme cylinder 09.

The surface speed v04 of the first roller 04 generated by the drive device 07 and the surface speed v06 of the second roller 06 generated by the drive device 08 are i. d. R. different from each other. Preferably, the surface speed v04 of the first roller 04 is less than the surface speed v06 of the second roller 06. The surface speeds v04; v06 are independently adjustable and variably adjustable. In a preferred embodiment, the surface speed v06 of the second roller 06 z. The surface speed v04 of the first roller 04 is limited in its height by the requirement that the first roller 04 on its surface the fountain solution 02 from the dampening solution reservoir 03 must reliably record. Experience has shown that from a surface speed v04 of the first roller 04 of more than 2 m / s sufficient absorption of dampening solution 02 is no longer ensured, since then the dampening solution 02 is ejected to a considerable extent from the surface of the first roller 04. Therefore, the surface speed v04 of the first roller 04 is preferably set to lower than its upper limit speed, e.g. B. to a value of at most 1.5 m / s. In contrast, the surface velocity v09 of the forme cylinder 09 is z. B. between 12 m / s and 15 m / s.

If the surface speed v06 of the second roller 06 is set greater than the surface speed v04 of the first roller 04, which is generally the case, exists between the first and the second roller 04; 06 a slip because the Surface speed v04 of the first roller 04 remains behind the surface speed v06 of the second roller 06. This is due to the ratio of surface velocities v04; v06 of the two rolls 04; 06 slip formed by the independent drive means 07; 08 for the first roller 04 and the second roller 06 variably adjustable.

Depending on a change in the surface velocity v09 of the driven by a further drive means 18 forme cylinder 09, z. B. when booting the surface speed v09 of the forme cylinder 09 z. B. from a setting speed of the printing press on their production speed, the to be transported by the compactor of the dampening unit 01 amount of dampening solution 02 is adjusted. The set-up speed of the printing press is z. B. between 1.7 m / s and 3.4 m / s, preferably between 2 m / s and 2.6 m / s, and is thus between 11% and at most 25% of the production speed of the printing press or the surface speed v09 of the forme cylinder 09. The surface speed v09 of the forme cylinder 09 is used to reach the production speed, starting from the set-up speed, ie, for example, to the production speed. B. increased fourfold to ninefold. For this large speed stroke, a fast-reacting, in the amount of dampening solution 02 to be transported needs customizable dampening unit 01 is required. Likewise, when transporting the press from its standstill or when reducing the production speed, the transporting quantity of dampening solution 02 must be adjusted in each case. Moreover, the current need for fountain solution 02 - as mentioned - depends on the amount of ink required for the printed product to be produced. On this need for adaptation can with a rigid coupling, z. B. a gear coupling between the first roller 04 and the second roller 06 in many applications, especially in printing machines with a large speed stroke, not always be sufficiently responded.

To accomplish the required adjustment, the drive means 07; 08 of the rollers 04; 06 of the dampening unit 01 in their speed controllable, preferably infinitely controllable, in particular electronically controlled. The controller can be remotely controlled z. B. from one of the printing press associated control center. The drive means 07; 08 for the first roller 04 and the second roller 06 are preferably as electric motors 07; 08, z. B. as AC or DC motors 07; 08 or as a frequency-controlled three-phase motors 07; 08 trained. Also, the drive means 18 of the forme cylinder 09 can be used as an electric motor 18, z. B. as an AC or DC motor 18 or as a frequency-controlled three-phase motor 18 and also as the drive means 07; 08 of the rollers 04; 06 of the dampening unit 01 be controllable. The drive device 18 of the forme cylinder 09 is in particular of the drive means 07; 08 of the rollers 04; 06 of the dampening unit 01 independently, d. H. in particular, there is no positive connection between the drive devices 07; 08 of the rollers 04; It is not necessary that the drive means 18 of the forme cylinder 09 exclusively drives only the forme cylinder 09, but the drive means 18 transmits the torque generated by it at least to the forme cylinder 09, but possibly also to the latter the form cylinder 09 cooperating transfer cylinder (not shown).

The control of the drive means 07; 08; 18 can be extended to a control if necessary by adding an actual value detecting feedback and a feedback signal evaluating evaluation, wherein preferably the actual value of a rotational speed of the rollers 04; 06 or the forme cylinder 09 z. B. is detected with a sensor providing an electrical output signal. The control or regulation of the drive means 07; 08; 18 is preferably carried out by means of a computing unit (not shown), the z. B. specifies a corridor for favorable settings.

The first roller 04 and the second roller 06 of the dampening unit 01 form the first rollers in the compactor, which transports the dampening solution 02 to the forme cylinder 09, wherein the surface speed v04 of the first roller 04 and the surface speed v06 of the second roller 06 independently and without rigid Depending on the surface speed v09 of the forme cylinder 09 are adjustable. The surface speed v04 of the first roller 04 or the surface speed v06 of the second roller 06 are i. d. R. lower than the surface velocity v09 of the forme cylinder 09th

It can be provided that, in a first operating state of the dampening unit 01, the surface speed v09 of the forme cylinder 09 and the surface speed v06 of the second roller 06 are in a first relationship to one another, whereas the surface speeds v06; v09 are in a second operating state of the dampening unit 01 in a second relationship to each other. During both operating states of the dampening unit 01, the surface speed v09 of the forme cylinder 09 can have the same value or assume different values from one another.

The compactor to the forme cylinder 09 can be extended by a third roller 11 or a fourth roller 13, wherein the third roller 11 of the second roller 06 and the fourth roller 13 of the third roller 11 is arranged downstream. The third roller 11 is z. B. by a transmission 12, z. B. a gear transmission 12 or a belt drive 12, coupled to the second roller 06. Alternatively, the drive of the third roller 11 by friction z. The surface speed of the rollers provided in the roller train to the forme cylinder 09 is set such that between the second roller 06 and the third roller 11 or between the third roller 11 and the fourth roller 13 slip exists. Between the first roller 04 and the second roller 06, the slip z. B. 1: 3, wherein the first roller 04 rotates slower than the second roller 06. The slip between the second roller 06 and the third roller 11 may be selected to be significantly larger, the third roller 11 rotates much faster than the second roller 06th

For better distribution of the fountain solution 02 on the surface of the roller 06 arranged in the roller train; 11; 13 and to prevent stenciling is at least one of these rollers 06; 11; 13, which follow the first roller 04 in the compactor, made iridescent. It is according to the invention, the designated traversing drive 19 from the rotary drive 07; 08 of the rollers 06; 11; 13 decouple and independently controllable design. In particular, the frequency of the traversing movement is freely selectable. The stroke of the traversing movement is z. B. ± 8 mm. However, it can also be a variably adjustable stroke of the traversing z. B. between 0 mm and 16 mm. The traversing drive 19 is z. B. as an electric motor 19, z. B. as a linear motor 19, is formed. The fountain solution 02 applying to the forme cylinder 09 roller 11; 13 is driven in particular by friction of the forme cylinder 09.

The forme cylinder 09 is associated with an inking unit 16 with at least one engageable with the forme cylinder 09 inking roller 17, wherein the inking unit 16 a (not shown) mounted on the surface of the forme cylinder 09 printing form by means of the inking roller 17 colors. The fountain solution 02 on the forme cylinder 09 priority-applying roller 06; 11; 13, that is, depending on the design of the roller, the second roller 06, the third roller 11 or the fourth roller 13, then preferably simultaneously to the form cylinder 09 and the inking roller 17 or to an inking roller of cooperating with the forme cylinder 09 inking unit 16 can be adjusted. The employment of the fountain solution 02 on the forme cylinder 09 applying roller 06; 11; 13 to the inking roller 17 can thus directly or indirectly via a z. B. also designed as an inking roller 14 bridge roller 14 done. In particular, in a dampening unit 01 with four rollers 04; 06; 11; 13 in the compactor can still another, the first bridge roller 14 upstream second bridge roller 23 may be provided (in Fig. 1 shown in dashed lines), wherein the upstream bridge roller 23 between the first bridge roller 14 and the third roller 11, that is arranged in the roller train before the dampening 02 to the forme cylinder 09 applying fourth roller 13 arranged roller 11 is arranged. The first bridge roller 14 is preferably mounted in a frame (not shown) and by at least one actuating means, for. As a remotely operable working cylinder, in particular a pneumatic cylinder (not shown) movable that they either, z. B. controlled by the control room, one of the four operating positions described below can take. In an operating position, it is on the inking roller 17 and not on the fountain solution 02 on the forme cylinder 09 applying roller 06; 11; 13 employed. In another operating position, the bridge roller 14 on which the fountain solution 02 on the forme cylinder 09 applying roller 06; 11; 13 and not employed on the inking roller 17. In another operating position, the bridge roller 14 at the same time on the fountain solution 02 on the forme cylinder 09 applying roller 06; 11; 13 and employed on the inking roller 17, wherein its normal operating position, wherein the bridge roller 14 can be moved in addition, if necessary, in the other remaining operating positions. Furthermore, the bridge roller 14 at the same time of the fountain solution 02 on the forme cylinder 09 applying roller 06; 11; 13 and parked by the inking roller 17. The bridge roller 14 is then turned on when it with a fountain solution 02 applying to the forme cylinder 09 roller 06; 11; 13 and / or is in operative contact with the inking roller 17 in physical contact or at least for the transport of the ink or dampening solution 02, whereas it is turned off when its surface is the surface of one of said rollers 06; 11; 13; 17 not touched or the surfaces of said rollers 06; 11; 13; 17 are at least not in operative connection for the transport of the paint or dampening solution 02. Also, the upstream bridge roller 23 may have a plurality of operating positions by either being engaged on the first bridge roller 14 or on the third roller 11 or by at least one of these rollers 11; 14 is turned off, wherein at least one adjusting means (not shown), z. B. a working cylinder, in particular a pneumatic cylinder, is provided, wherein the adjusting means moves the upstream bridge roller 23 from one to another operating position, wherein the actuation of this actuating means preferably also remotely controlled, in particular from the control room, can take place.

When touching contact forms between the rollers 04; 06; 11; 13 on its surface, preferably in the axial direction of a flattened strip having a width between 3 mm and 8 mm, preferably between 5 mm and 6 mm, from. Between the dampening solution 02 on the forme cylinder 09 applying roller 06; 11; 13 and the inking roller 17 and the forme cylinder 09, the flattened strip may have a width of 8 mm to 10 mm. The contact contact between the rollers 04; 06; 11; 13; 17 or the forme cylinder 09 z. B. manually adjusted with an adjusting spindle, preferably by a path change, the set width of the strip remains unchanged during the printing process. If the width of the strip is to be variable during the printing process, it is advantageous to adjust the setting of the rollers 04; 06; 11; 13; 17 perform with a roller lock, the z. B. remotely controlled, preferably by an operation from the control center, performs a radial stroke. The adjustment of the width of the strip is i. d. R. regardless of the surface velocity v09 of the forme cylinder 09th

The bridge roller 14 is preferably formed iridescent and z. B. from a preferably as a controllable motor 21, z. B. as a linear motor 21, trained traction drive 21 is preferably driven independently of its rotational movement, wherein for their rotational movement another, of the remaining drive means 07; 08; 18 independent drive device 22, z. Example, a motor 22, preferably an AC or DC motor 22 or a frequency-controlled three-phase motor 22, in particular an electric, remotely controllable motor 22 may be provided.

When the fountain solution 02 applying to the forme cylinder 09 roller 11; 13 is driven by friction, this roller 11; Be stored in the frame 13 so that it is an axial stroke of z. B. 3 mm to 4 mm is possible, this hub is carried out in that it is taken by the traversing movement of the bridge roller 14. Between the dampening solution 02 on the forme cylinder 09 applying roller 11; 13 and the forme cylinder 09 is preferably no or only a minimum slip of less than 2%, preferably less than 1%. In special applications, but also as an alternative to the friction drive for the rotational movement of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 a separate, from the remaining drive means 07; 08; 18; 22 independent drive means (not shown), z. B. a motor, preferably an AC or DC motor or a frequency-controlled three-phase motor can be provided.

For the conversion of the dampening unit 01 between the operating mode "direct moisture" and the operating mode "indirect humidification" can be provided that the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 can be adjusted to the bridge roller 14 or turned off by it. In the Fig. 2 is to the fountain solution 02 on the forme cylinder 09 applying roller 11; 13, here the roller 13, shown in two operating positions. In the dash-dotted representation, the roller 13 is parked by the bridge roller 14. To the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 to move into their desired operating position, is at least one preferably remotely controllable, z. B. controllable by the control center adjusting means (not shown), z. B. a working cylinder, preferably a pneumatic cylinder, provided, which is the fountain solution 02 on the forme cylinder 09-applying roller 11; 13 with respect to the bridge roller 14 brings in one of the two operating positions or turns off the forme cylinder 09. The fountain solution 02 applying to the forme cylinder 09 roller 11; 13 can z. B. be stored in an eccentric bush, in which the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is moved with the actuating means in its desired operating position. The "direct humidification" mode is selected when the the fountain solution 02 on the forme cylinder 09 roller 11; 13 is employed on the forme cylinder 09 and parked by the bridge roller 14. In this mode, the fountain solution 02 carrying on the forme cylinder 09 roller 11; 13 only the fountain solution 02 on the forme cylinder 09 on. The mode "indirect humidification" is selected when the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is employed at the same time on the forme cylinder 09 and on the bridge roller 14. When "indirect dampening" transports the dampening solution 02 on the forme cylinder 09 applying roller 11; 13 also in not insignificant extent coming from the inking unit 16 color to the forme cylinder 09th

It can be provided that the first roller 04 and the second roller 06 together from the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 are movable. For this purpose, the first roller 04 and the second roller 06 may be mounted in a common support, wherein the support z. B. has a pivot about which the support is rotatable, whereby the first roller 04 and the second roller 06 of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 swing together.

The surface of the first roller 04 is z. B. of an elastomeric material, preferably of a rubber, in particular of a material having a hardness between 20 and 30 Shore A, preferably about 25 Shore A. The surface of the second roller 06 is z. B. from a ceramic or a chromium-containing material, wherein z. B. on a roll core of a metallic material, a coating of a chromium-containing material is applied. The surface of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is again z. B. of an elastomeric material, preferably of a rubber, in particular of a material having a hardness between 25 and 40 Shore A, preferably about 35 Shore A. The surface of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is thus preferably harder than the surface of the first roller 04. The Surface of the second roller 06 is preferably much harder, z. B. by a factor of ten harder than the surface of the first roller 04 or the surface of the dampening solution 02 on the forme cylinder 09 applying roller 11; 13 trained. The surface of the bridge roller 14 is z. B. of a plastic, preferably from Rilsan. The surface of the upstream bridge roller 23, however, may consist of an elastomer material, preferably of a rubber.

The surface speeds of the forme cylinder 09 to the roller 02 applying the dampening solution 02 to the forme cylinder 09 to the third roller 11 to the second roller 06 to the first roller 04 behave as 1 to (1 to 0.98) (0.4 to 0, for example). 98) to (0.25 to 0.4) to (0.08 to 0.18), preferably 1 to 0.99 to 0.96 to 0.33 to 0.1. When using only three rolls in the compactor between the forme cylinder 09 and the fountain solution 03 eliminates the above for the third roller 11 separately mentioned slip ratio, because the third roller 11 is already the fountain solution 02 on the forme cylinder 09 applying roller.

01

Feuchtwerk, Filmfeuchtwerk

02

Feuchtmittel, Wasser, Alkohol-Wasser-Gemisch

03

Feuchtmittelquelle, Feuchtmittelreservoir, Feuchtmittelkasten, Wanne, Sprühbalken, Sprühdüse

04

Walze, erste; Tauchwalze, Duktorwalze

05

-

06

Walze, zweite; Dosierwalze, Feuchtübertragungswalze, Reibwalze

07

Antriebseinrichtung, Motor, AC- oder DC-Motor, Drehstrommotor

08

Antriebseinrichtung, Motor, AC- oder DC-Motor, Drehstrommotor

09

Formzylinder

10

-

11

Walze, dritte

12

Getriebe, Zahnradgetriebe, Riementrieb

13

Walze, vierte

14

Brückenwalze; Farbreiberwalze

15

-

16

Farbwerk

17

Farbauftragswalze

18

Antriebseinrichtung; Motor, Drehstrommotor

19

Changierantrieb; Motor; Linearmotor

20

-

21

Changierantrieb; Motor; Linearmotor

22

Antriebseinrichtung; Motor, AC- oder DC-Motor, Drehstrommotor

23

vorgelagerte Brückenwalze

v04

Oberflächengeschwindigkeit (04)

v06

Oberflächengeschwindigkeit (06)

v09

Oberflächengeschwindigkeit (09)

LIST OF REFERENCE NUMBERS

01

Dampening unit, film dampening unit

02

Dampening solution, water, alcohol-water mixture

03

Dampening agent source, fountain solution reservoir, fountain solution box, tray, spray bar, spray nozzle

04

Roller, first; Dipping roller, ductor roller

05

-

06

Roller, second; Dosing roller, wet transfer roller, rubbing roller

07

Drive device, motor, AC or DC motor, three-phase motor

08

Drive device, motor, AC or DC motor, three-phase motor

09

form cylinder

10

-

11

Roller, third

12

Transmission, gear transmission, belt drive

13

Roller, fourth

14

Bridge roller; Ink distributor roller

15

-

16

inking

17

Inking roller

18

Drive means; Motor, three-phase motor

19

Traversing drive; Engine; linear motor

20

-

21

Traversing drive; Engine; linear motor

22

Drive means; Motor, AC or DC motor, three-phase motor

23

upstream bridge roller

v04

Surface speed (04)

v06

Surface speed (06)

v09

Surface speed (09)

Claims (8)

1. Dampening system (01) having a first roll (04) taking up a moistening agent (02) from a moistening agent source (03) and a second roll (06), the first roll (04) transferring the moistening agent (02) to the second roll (06), the first roll (04) and the second roll (06) having separate drive devices (07; 08) for their respective rotational movement, the first roll (04) and the second roll (06) belonging to a drum roller, which transports the moistening agent (02) to a forme cylinder (09) of a printing press driven by a further drive device (18), at least one third roll (11) being provided downstream of the second roll (06) in the drum roller of the forme cylinder (09), which applies the moistening agent (02) to the forme cylinder (09), the second roll (06) oscillating, characterised in that for the oscillating movement of the second roll (06) an oscillating drive (19) independent of its rotational movement is provided, and in that a bridge roller (14) in contact with the third roll (11) and with a colouration roll (17) in contact with the forme cylinder (09) is provided, the bridging roll (14) oscillating and having an oscillating drive (21) independent of its rotational movement.
2. Dampening system (01) according to Claim 1, characterised in that a fourth roll (13) is provided in the drum roller between the third roll (11) and the forme cylinder (09), the fourth roll (13) applying the moistening agent (02) to the forme cylinder (09) instead of the third roll (11).
3. Moistening system (01) according to Claim 1, characterised in that the third roll (11) downstream of the second roll (06) is coupled to the second roll (06) by a drive (12).
4. Dampening system (01) according to Claim 1, characterised in that the bridging roll (14) is in contact in one operating position either with the colouration roll (17) and not with a roll (06; 11; 13) applying the moistening agent (02) to the forme cylinder (09) or in another operating position with a roll (06; 11; 13) applying the moistening agent (02) to the forme cylinder (09) and not with the colouration roll (17).
5. Dampening system (01) according to Claim 1, characterised in that the bridging roll (14) in a further operating position is simultaneously in contact neither with the colouration roll (17) nor with a roll (06; 11; 13) applying the moistening agent (02) to the forme cylinder (09).
6. Dampening system (01) according to Claim 1, characterised in that the bridging roll (14; 23) having at least one control means is movable optionally to different operating positions, the control means being actuatable by a control centre.
7. Dampening system (01) according to Claim 1, characterised in that the roll (11; 13) applying the moistening agent (02) to the forme cylinder (09) is either in contact with the forme cylinder (09) in one operating position and not in contact with the bridging roll (14), or in another operating position the roll (11; 13) applying the moistening agent (02) to the forme cylinder (09) is simultaneously in contact with the forme cylinder (09) and the bridging roll (14).
8. Dampening system (01) according to Claim 1, characterised in that the oscillating movement of the bridging roll (14) is freely selectable in its frequency.

Images