EP1968804B1 - Continuous-feed inking units of a printing machine - Google Patents

Abstract

Roller (01) with the outer surface (02) made of an elastomer material has printing ink or a damp means transported by the rotation of the roller with their lateral surface. The lateral surface, in a stochastic distribution has several open cavities (07) at the lateral surface. The cavities neither have smooth walled nor homogeneous or uniform flanks in the inner side of the roller.

Description

The invention relates to a film inking unit of a printing press according to the preamble of claim 1.

By the US 4,537,127 is an ink roller formed from steel whose outer surface is structured by engraving preferably with intersecting lines in a cell pattern, surface hardened by nitriding and then subjected to an oxidation process, wherein the oxidation process on the outer surface of the roller an outer mainly of Fe ₃ O ₄ existing layer is formed.

By the DE 30 04 295 A1 is known a hard-surface fluid roll, wherein on the outer surface of the cylindrical core a hard metal coating z. B. chrome z. B. is applied with a thickness of up to 0.5 mm, wherein in this coating by etching a random pattern of interconnected columns and intermediate, separate islands is formed, wherein the interconnected columns occupy up to 30% of the surface of the fluid roller, wherein the column has a depth z. B. up to 0.075 mm. This fluid roller cooperates for the transport of the fluid with another roller, this further roller has a soft lateral surface, wherein both rollers are employed against each other.

By the DE 27 23 582 B a paint roller with a formed as a sleeve shell part of a microporous elastomeric material is known, wherein in the z. B. consisting of foam rubber casing part a plurality of cavities, wherein the cavities within a predetermined size range different Sizes, wherein the cavities are interconnected by channels, wherein the cavities and the channels each with a heat-sensitive, the passage cross-section of the cavities and channels as a function of the temperature-regulating envelope, for. B. are lined by a plastisol, so that ink does not touch the respective walls of the cavities and channels directly. The ink roller is impregnated with a relatively low viscosity ink having a viscosity of 2.5 Pa * s, the ink being stored in the cavities and channels of the shell portion and directed through the channels to the roll surface in the printing process, thereby providing a metered release of that stored in the shell portion Ink allows and in particular at a peripheral speed of at least 305 m / min. a throwing away of color spray is avoided.

By the DE 24 33 749 A1 is a transfer roller with an elastomeric cover layer having a hardness of 15 to 45 Shore A known, these for better distribution z. B. a color to be transferred has a fine-pored, roughened surface, said surface may be produced by a grinding treatment. The transfer roller may have a surface with a fibrous structure.

By the DE 11 35 930 B is a dampening roller with a arranged around a metallic wave around fine and open-pored surface layer known that at least on its outer side of a highly elastic material z. Example, of silicone or polytetrafluoro chloride, wherein below the surface layer, a layer of foamed rubber or polyvinyl chloride and around the metallic shaft around an inner layer of solid rubber or plastic may be provided. The open-pore outside of the fountain roller is covered with a thin, solid, coherent anti-adhesive film, so that there is a release layer to be transported dampening solution.

By the DE 199 34 395 A1 is an inking unit in a rotary offset printing machine in the an inking roll known which one of a solid, rigid material, for. B. steel inner core and an outer layer, wherein the z. B. of an elastomer, in particular made of a rubber outer layer has a hardness in the range between 50 Shore A and 100 Shore A, wherein the particular hollow core of the inking roller z. B. has at least one cooling liquid channel to avoid overheating of the inking roller during the continuous printing operation.

By the DE 101 19 074 A1 and the EP 1 251 404 A2 are each a picture carrier, z. As a roller, with a 1 mm thick elastomeric coating known, the elastomer layer to avoid a register accuracy reducing deformation slip cavities having a volume fraction in the range between 5% and 95%.

By the GB-PS 729 561 is a paint roller with a z. B. rubber existing surface with stochastically distributed arranged recesses, said depressions serve a transport of ink, wherein the recesses are made by sandblasting or shot peening.

By the EP 0 367 193 B1 is a z. Example, in an offset printing method multi-color printing machine known, which used for the ink transfer in each case a roller with formed on the elastomeric surface of hollow bodies with a diameter in the range of 5 microns to 300 microns, wherein at a low fluidity of the ink to be transferred either the number of hollow body increases or the size of the hollow body is increased.

By the DE 200 03 767 U1 a film inking unit of a printing press is known having a film roller operatively connected to a separate drive or to a printing cylinder drive, the film roller being circumferentially made of an elastic material.

By the DE 101 12 756 A1 a film inking unit with a driven by the forme cylinder drive via a gear train film roll is known, wherein the peripheral surface speed of the film roll in the printing operation corresponds approximately to the peripheral surface speed of the forme cylinder. The ink ductor of the film inking unit is driven independently of the forme cylinder drive. A downstream in the color flow direction of the film roll transfer roller is driven by the film roller by friction. Between the ink fountain roller and the film roller, a gap is set in the range between 0.05 mm and 0.1 mm. The film roll has a hard, metallic, or hard plastic peripheral surface profiled with a helical, multi-ply surface structure consisting of recesses (grooves) and protrusions (lands).

By the EP 0 462 490 A1 are arranged in a film dampening rollers with a lateral surface of an elastomeric material known.

By the EP 0 662 394 A1 For example, a pressure roller having a metal core and a surface layer covering the metal core is known wherein the surface layer is roughened by grooves of irregular and random width and depth, either by forming a random lattice shape of a plurality of the grooves, such that a large number of diamond shaped structures pass through the grooves is defined, each diamond-shaped structure having two diagonally opposite corners, each enclosing an angle of 20 ° to 160 °, or by forming a number of parallel grooves, each for forming a continuous groove at an angle of 10 ° to 80 ° with form the axis of the metal core.

By the DE 100 39 279 A1 is a roller for printing machines known, the peripheral surface with a z. B. stochastic surface structure is provided and z. B. consists of a coating with a rubber or a plastic. The arranged on the peripheral surface structural elements may, for. B. as by the Be coating formed through holes or holes. The roller can be used in a compactor of a color ductor having inking unit of a printing press.

The invention has for its object to provide a film inking a printing press with improved conveying behavior.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that a conveying behavior of the film inking unit compared to a conventional film inking plant is significantly improved by a transported by the rollers of the film inking unit in its rotation amount of ink is comparatively larger, since less ink excretes from the ink flow in the film inking unit and gets lost by spraying. The proposed roller sprayed with the formed on its lateral surface Cavities in their rotation less of the ink to be transported, so that the transport of the ink to be transported by a compactor is less lossy compared to a conventional roller. This advantageous effect is particularly noticeable in an arrangement of this roller in a printing machine, which produces at a production speed of 10 m / s, in particular 15 m / s or faster. By formed on the lateral surface of the proposed roller cavities an effective for the transport of ink conveying surface is increased, whereby an effective area for adhesion-based adhesiveness of the ink is increased on the lateral surface of the roller.

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

Fig. 1

eine perspektivische Darstellung einer Walze mit einer Mantelfläche aus einem Elastomerwerkstoff;

Fig. 2

einen Ausschnitt aus der Mantelfläche der in der Fig. 1 dargestellten Walze;

Fig. 3

eine erste Ausführungsvariante eines Farbwerks mit einer Walze gemäß Fig. 1;

Fig. 4

eine drehelastische Kupplung;

Fig. 5

eine an der in der Fig. 1 dargestellten Walze angebaute Kupplung gemäß Fig. 4;

Fig. 6

eine gekühlte Walze;

Fig. 7 bis 12

Ausführungsvarianten einer aus einem CFK-Material bestehenden Walze gemäß Fig. 1;

Fig. 13

eine zweite Ausführungsvariante eines Farbwerks mit einer Walze gemäß Fig. 1;

Fig. 14

ein Ausschnitt aus der Mantelfläche der in dem Farbwerk der Fig. 13 eingesetzten Filmwalze mit einem Rautenmuster.

Show it:

Fig. 1

a perspective view of a roller with a lateral surface of an elastomeric material;

Fig. 2

a section of the lateral surface in the Fig. 1 illustrated roller;

Fig. 3

a first embodiment of an inking unit with a roller according to Fig. 1 ;

Fig. 4

a torsionally flexible coupling;

Fig. 5

one at the in the Fig. 1 shown roller mounted coupling according to Fig. 4 ;

Fig. 6

a cooled roller;

Fig. 7 to 12

Embodiment variants of a roll consisting of a CFRP material according to Fig. 1 ;

Fig. 13

a second embodiment of an inking unit with a roller according to Fig. 1 ;

Fig. 14

a section of the lateral surface of the in the inking of the Fig. 13 used film roller with a diamond pattern.

Fig. 1 shows a perspective view of a roller 01 with a lateral surface 02 of an elastomeric material, wherein it is the elastomeric material is a naturally derived or synthetically produced rubber or a plastic, for. As a polymer or a polyadduct, in particular polyurethane, is. The elastomer material may be applied in the form of a coating 03 on a base body 04 of the roller 01. The elastomeric material may also have a viscoelastic behavior.

The roller 01 proposed here is intended for use in a printing machine, in particular for use in a z. B. in an offset printing process printing rotary printing machine, z. Example, in a rotary printing press used in newspaper printing or commercial printing, wherein the printing machine in particular an inking unit 11, preferably a film inking unit 11, and when printing in a conventional wet offset printing process with a fountain solution used in the printing process and a dampening unit 21 ( Fig. 3 ). The inking unit 11 and / or the dampening unit 21 each consist of a preferably multiple rollers having compactor, wherein at least one of the rollers of the respective roller train is formed as an aforementioned roller 01 with a lateral surface 02 made of an elastomer material. However, it is also possible for a plurality of the rollers of the respective roller to be designed as a roller 01 with a lateral surface 02 made of an elastomer material. The rollers of the inking unit 11 transport from a paint reservoir 16, z. B. from a color box 16 or a color pan 16, ink 14 z. B. to a in the Printing press arranged printing cylinder 12, z. B. The rollers of the dampening 21 transport from a dampening solution fountain solution to the arranged in the printing press forme cylinder 12. The aforementioned roller 01 with a lateral surface 02 made of an elastomer material may, depending on their use in the printing machine z. Example, as a scoop roller or as a film roll or as a transfer roller or as an applicator roll, said roller 01 by its rotation about its longitudinal axis of rotation 06 with its outer surface 02 depending on their use in an inking unit 11 or in a dampening 21st Ink 14 or the dampening solution receives and preferably in the form of a thin, in particular a closed on the lateral surface 02 fluid film with a layer thickness z. B. of less than 500 microns on. The layer thickness of the fluid film is in particular less than 150 μm, preferably between 50 μm and 100 μm. Thus, the volume of printing ink or fountain solution transferred by the roller 01 in the compactor is in particular less than 150,000 mm ³ per m ^{2 of} the lateral surface 02 of this roller 01, preferably the volume is in the range between 50,000 mm ³ and 100,000 mm ³ . The roller 01 with a lateral surface 02 made of an elastomer material may, for. B. also be arranged adjacent to a conventional film roll. The roller 01 with a lateral surface 02 made of an elastomer material, in particular when it is used as a film roller, by a drive 18, for. Example, a motor 18, in particular an electric motor 18, individually or together with another rotating body in the compactor of the film inking unit 11 or driven by a drive 19 of a printing cylinder 12 of the printing press. But it can also be driven by force exerted by an adjacent body of rotation friction, ie only by force and without the use of a positive drive element.

The roller 01 has a length L z in its axial direction. B. in the range of 1,000 mm to 2,600 mm, in particular in the range of 1,400 mm to 2,400 mm, and an outer diameter D z. B. in the range of 50 mm to 300 mm, preferably between 80 mm and 250 mm. The coating 03 with the elastomer material applied to the base body 04 of the roller 01 can have a layer thickness S z. B. in the range of 1 mm to 15 mm, preferably between 5 mm and 10 mm. The elastomeric material has a hardness in the range between 25 and 60 Shore A, preferably in the range between 30 and 50 Shore A, these hardness details and their test methods are defined according to DIN 53505.

Fig. 2 shows enlarged perspective, essentially, for example, at least approximately parallelepiped cutout of the existing elastomeric material coating 03 of the roller 01. Since the coating 03 of the lateral surface 02 of the roller 01 is made homogeneous, the location of the cut on the lateral surface 02 of the roller 01 be selected arbitrarily, as long as the cutout on the lateral surface 02 of the roller 01 is surrounded on all sides by the elastomer material. An area immediately adjacent to an end face of the roller 01 on the lateral surface 02 of the roller 01 is therefore less suitable for the location of the cutout. The section represents, in particular, a measuring sample or measuring surface representative of the lateral surface 02, on the basis of which the coating 03, consisting of the elastomer material, of the roller 01, by means of a three-dimensionally recording the topography of the measuring sample. B. optical measuring method can be examined in more detail. Accordingly, the measurement method preferably performs a 3D surface analysis on the measurement sample and is able to determine the measurement result z. B. also graphically displayed on a display device of a computing unit. A suitable for 3D surface analysis measurement method is z. B. with the developed at the Chair of Manufacturing Technology of the University of Erlangen-Nuremberg (DE) topography analysis software WinSAM, which is a program in the form of a surface analysis module, especially for an executed in the computing unit operating system such as Windows NT. The calculations performed by this program are for example: B. the following known in the surface physics regulations: DIN 4762, DIN 4768, DIN 4771, DIN 4776, DIN EN ISO 4287.

The Indian Fig. 2 enlarged detail shows the 3D surface analysis to be subjected to the measuring sample and is therefore only apparent from the cylindrical surface 02 of the roller 01 taken. In particular, he defines a measurement sample having a rectangular, preferably square, base surface with an edge length l, wherein the edge length l z. B. in the range between 1 mm and 10 mm, preferably between 4 mm and 6 mm. At least in the circumferential direction of the roller 01 directed mutually parallel edges of the cutout slightly curved with a dependent on the outer diameter D of the roller 01 curvature, however, for further consideration the degree of curvature due to the size of the outer diameter D of the roller 01 relative to the circumferential direction the roller 01 directed edge length I of the cut should be negligible, because the outer diameter D of the roller 01 z. B. far more than ten times, z. B. twenty-five times to thirty times greater than the directed in the circumferential direction of the roller 01 edge length I of the section. The magnification is z. B. with a factor of at least 10, preferably 100 or more. The examined with a measuring method, preferably rectangular cutout from the coating 03 has z. B. a-radially to the rotation axis 06 of the roller 01 directed depth t0 of 1 mm or less, preferably between 100 microns and 500 microns. The depth t0 of the cutout is thus small in comparison to the layer thickness S of the elastomer material, since the depth t0 of the cut z. B. is significantly smaller than a tenth, z. B. less than a twenty-fifth of the layer thickness S of the elastomer material.

For the measurement method investigating the section of the coating 03, a cylindrical surface, assigned to the surface 01 of the roller 01, is defined as a reference surface, said cylindrical surface defined as a reference surface being located where the outer diameter D having roller 01 is arranged on its circumference actually limiting cylindrical surface. The cylindrical surface actually bounding the roller 01 as a rotational body has a roughness with an absolute roughness depth R _t z. B. in the range of 100 microns to 120 microns and with an average roughness R _z z. B. in the range of 20 microns to 100 microns, preferably from 60 microns to 80 microns, these values z. B. with a perthometer, ie a stylus device, preferably in accordance with relevant standards, eg. B. DIN EN ISO 4287, can be determined. A calculated according to DIN 4776 from an Abbott curve smallest material content Mr1 (corresponding to a supporting portion of the tips) of the lateral surface 02 of the roller 01 is z. In the range between 7% and 13%, preferably between 9% and 11%. A according to DIN 4776 from the same Abbott curve determined largest material content Mr2 (corresponding to a supporting portion of the grooves) of the lateral surface 02 of the roller 01 is z. In the range between 80% and 95%, preferably between 85% and 90%.

To improve the conveying behavior of the roller 01, d. H. in order to increase the amount of printing ink 14 or dampening solution transported by the roller 01 during its rotation, the lateral surface 02 in each arbitrarily selected section has a multiplicity of cavities 07 directed into the interior of the roller 01, at least on the lateral surface 02 Cavities 07 are irregular at least in their respective structure, but preferably also in their distribution on the lateral surface 02, d. H. at least there should be no uniform design of these cavities 07, preferably also no uniform distribution of these cavities 07. Rather, the cavities 07 dissect the lateral surface 02 in a stochastic manner. A depth t1 of these cavities 07 is variable in the region of the depth t0 of the cutout and should be able to reach at most the depth t0 of the cutout. The depth t0 of the measurement sample determined by the cutout is therefore always chosen to be greater in practice than the maximum occurring depth t1 of one of the cavities 07 present in the selected cutout. The depth t1 of the cavities 07 is z. B. up to 400 microns, preferably between 50 microns and 300 microns.

Due to their directed into the interior of the roller 01 flanks increase the cavities 07, the cylindrical surface, with an indication of the area increase z. B. on the smooth-walled imaginary cylindrical surface is covered. The flanks of the cavities 07 are formed to improve the adhesion for a transportable ink 14 or a dampening solution to be transported neither smooth-walled nor uniform or uniform. Thus, the flanks of the cavities 07 have, in particular, different pitch angles relative to the reference surface, wherein the pitch angles in the range between 0 ° and 90 ° preferably have an irregular distribution. The lateral surface 02, which is enlarged by the surface of the flanks of the cavities 07, forms an effective surface of the roller 01, the effective surface of the roller 01 being the surface effective for transporting the printing ink 14 or dampening solution, ie the surface which is in contact with the printing ink 14 or the dampening solution is in touching contact, wherein this effective surface of the roller 01 in the preferred embodiment, in particular by the flanks of the cavities 07 is at least 20% larger than the intended as a smooth-walled cylindrical surface. Preferably, the effective surface of the roller 01 is at least twice as large as the imaginary cylindrical surface of the roller 01 referred to. The effective surface of the roller 01 provides a quantity of ink 14 or fountain solution to be transported with the surface 02 of the roller 01 compared to the smooth-walled imaginary cylindrical surface larger conveying surface at which the ink to be transported 14 or the dampening solution to be transported can adhere by adhesion. The enlarged conveying surface thus forms an enlarged effective area for adhesion of the printing ink 14 or of the fountain solution to the lateral surface 02 of the roller 01.

Moreover, the cavities 07, which are filled with the ink to be transported 14 or the dampening solution to be transported, reduce pressure build-up in the outlet gap of two rollers in the roller train of the inking unit 11 or the dampening unit 21 adjacent, with respect to the transport of the printing ink 14 or the dampening agent cooperating rollers , These rollers are preferably employed against each other while exerting a contact pressure. Due to the reduced pressure build-up in the Outlet gap of these rolls is less sprayed during the rotation of the ink to be transported 14 or the dampening solution to be transported by forming a spray, so that the transport of the ink to be transported 14 or the dampening solution to be transported in the transition from one to the next roller compared to a roller with a smooth surface, that is less lossy compared to a roller 01 with a lateral surface 02 without there formed cavities 07.

Each of the cavities 07 open on the lateral surface 02 forms a void with respect to the cylindrical reference surface, ie with respect to the closed and smooth-walled cylindrical surface, the void area corresponding to the opening cross-section of the respective cavity 07 in the plane of the reference surface. In the measuring sample, there are empty surfaces surrounded on all sides by the elastomer material and such empty surfaces which, due to their position, are open on at least one of the edges of the section selected as the measurement sample. The sum of the empty surfaces of all cavities 07 present on the lateral surface 02 forms a vacant space fraction relative to the closed, imaginary cylindrical surface, the vacant space fraction being at most 35% of this cylindrical surface and preferably between 20% and 30%. Depending on the size of their respective empty space and their respective depth t1, the cavities 07 in the coating 03 form a void volume, the void volume of all cavities 07 present per m ^{2 of} imaginary cylindrical surface being at least 50,000 mm ³ , preferably at least 100,000 mm ³ , in particular at least 150,000 mm ³ .

The arranged on the lateral surface 02 cavities 07 structure with their respective Leerflächenanteil and with their respective void volume, the lateral surface 02 and form a relief there, this relief z. B. is tuned to the rheological behavior of the ink to be transported 14 or the dampening solution to be transported, in particular the viscosity and / or the tack of the transported Printing ink 14, so that the operations of filling and emptying of the cavities 07 with the ink to be transported 14 or the dampening solution to be transported and arresting the ink to be transported 14 or the dampening solution to be transported during their respective transport from one roller to the next depending on a for this roller 01 at the lateral surface 02 provided rotational speed are optimized, wherein the rotational speed of the roller 01 conditional production speed of this roller 01 in their inking unit 11 or in their dampening unit 21 having printing machine, in particular a newspaper printing or commercial printing rotary printing machine, for. B. may be in the range up to 20 m / s. The advantageous effect of introduced into the coating 03 of the roller 01 cavities 07 comes especially at a higher production speed of the printing machine to advantage, for. B. at a production rate from 10 m / s, in particular in the range between 15 m / s and 20 m / s. Advantageously, the vacant space portion and / or the void volume of the cavities 07 is adapted to the roller 07 provided for these cavities due to the production speed of the printing press rotational speed.

The lateral surface 02 open-pore forming cavities 07 are preferably introduced by a forming a spatial structure process in the coating 03 of the roller 01. Such methods may in particular be a machining, z. Example, a cutting process with or without material degradation or a turning process or a milling process or a grinding process, but also a blasting process or a stamping process. Moreover, the cavities 07 in the coating 03 of the roller 01 can also be produced by a primary shaping by z. B. in the coating 03 of the roller 01 at least on the lateral surface 02, first a filler is introduced, which then z. B. is removed thermally or chemically, so that remain after the removal of the filler on the lateral surface 02, the cavities 07. Due to the manufacturing method used may be at the Lateral surface 02 of the roller 01 in particular along z. B. spiral processing paths give a preferred direction for the arrangement of the cavities 07. The z. B. in the form of grooves or grooves recognizable preferred direction for the arrangement of the cavities 07 may starting from a directed onto the axis of rotation 06 of the roller 01 solder have an inclination angle in the range of + 45 ° to + 90 ° or -45 ° to -90 ° , At the two opposite edges of the roller 01, ie close to their end faces, the angle of inclination of the preferred direction for the arrangement of the cavities 07 may each be formed in opposite directions. Despite the preferred direction for the arrangement of the cavities 07, which may arise along machining paths, due to the manufacturing method used, the cavities 07 on the lateral surface 02 of the roller 01 are nevertheless in a stochastic, ie in a unsystematic, irregular, inconsistent, by chance arranged distribution.

Fig. 3 schematically shows in a first embodiment of an attached to a printing cylinder 12, in particular an attached to a forme cylinder 12 inking unit 11, wherein the inking unit 11 is formed in particular as a film inking unit 11. In the in the Fig. 3 Example shown, a dampening unit 21 is provided. In the upper area of the film inking unit 11, a ink fountain roller 13 and, by way of example, the previously described roller 01, which has an outer surface 02 made of an elastomer material, are used as a film roller 01. As a film roller 01 is in the roller train of the inking unit 11 the ink fountain roller 13 following. The starting with the ink fountain roller 13 through the inking unit 11 to the forme cylinder 12 to be transported ink 14 is z. B. in an ink fountain 16 or in a paint tray 16 stocked. The ink fountain roller 13 has the task of supplying the film inking unit 11 with a quantity of ink adapted to the printing work continuously, uniformly and without fluctuation from this storage. A z. B. with an actuator (not shown) by a remote control to the ink fountain roller 13 adjustable colorimeter (not shown) trailing from the rotating ink fountain roller 13 excess recorded ink 14 from.

If a distance between the ink knife and the ink fountain roller 13 is changed by an actuation of the adjusting element, a more or less strong color profile is produced on the outer surface of the ink fountain roller 13 as a function of the set distance between the ink jet and the ink fountain roller 13. Depending on the desired amount of ink more or less ink 14 is passed or inked between the ink fountain roller 13 and color blade lamella. The film roller 01 is in continuous direct physical contact with an ink roller 17 of the inking unit 11 downstream of the film roller 01. A gap-shaped space a extending between the ink fountain roller 13 and the film roller 01 extending in the axial direction of the film roller 01 is defined by a radial displacement of the film roll 01, d. H. by their variable arrangement of the film roller 01 in the film inking unit 11, in a range of z. B. 0 mm to 2 mm adjustable and preferably set to about 0.05 mm, wherein the distance a is fixed after its setting in the printing operation of the printing press. The entrained on the ink fountain roller 13 layer of ink 14, which exceeds a corresponding with the preset distance a of 0.05 mm radial height is permanently removed from the rotating film roll 01 and subsequent to the in-roller of the inking unit 11 rollers, in particular the Ink roller 17 transferred. The amount of ink absorbed by the ink fountain roller 13 from the ink reservoir 16 is thus continuously split in the ink layer and continuously transferred. At the end of the roller train of the inking unit 11 carry in this example two inking rollers 22 ink 14 on the forme cylinder 12 and at least one arranged on the forme cylinder 12 printing plate. On the form cylinder 12, a plurality of printing plates are preferably arranged, for. B. in the axial direction up to six printing plates next to each other and / or in its circumferential direction z. B. two printing plates one behind the other, each printing form with its respective subject the printed image of z. B. prints exactly one newspaper page.

For printing a large format substrate, z. B. a material web, in particular a paper web, with a width of more than 1,000 mm, preferably from.more than 1,400 mm, e.g. B. with a width between 1,400 mm and 2,400 mm, in particular for the production of a printed product with a high circulation or a larger page number, z. As a newspaper with 48 or more pages, a printing press is required, the rollers and cylinders have at least the width of the printing material corresponding, large axial length L. Rollers and cylinders each with a large axial length L of z. B. over 1,400 mm, however, in particular at a high production speed, ie a transport speed of the printing material by the printing press of z. B. 15 m / s and above, not without problems. On the one hand, rollers and cylinders tend to oscillate with a large axial length L, on the other hand, such rollers and cylinders usually have a relatively large mass which in printing operation in an acceleration or deceleration to form an undesirable slip with an adjacent roller or can lead with an adjacent cylinder. For the production of printed products with a high print quality, however, such a slip formation is to be avoided, which is why such rolls and cylinders are controlled and defined, that is, to be rotated without slippage.

For a controlled, slip-free operation of such a film roll 01, it is proposed to form a film roll 01 with an axial length L of more than 1,000 mm, preferably more than 1,400 mm, in functional connection with a separate drive 18 or with a printing cylinder drive 19; the axial length L of this film roller 01 is preferably in the range between 1,400 mm and 2,400 mm. The outer diameter D of this film roll 01 is preferably in the range between 50 mm and 300 mm, in particular between 80 mm and 250 mm. The film roller 01 has, depending on the material used for their preparation a mass z. B. of more than 150 kg, sometimes even more than 200 kg. Such a film roller 01 is also usable in a 48 or more pages printing rotary printing machine, for. In a 48, 64, 72 or 80 page rotary press.

For a controlled and defined rotational operation, the film roller 01 has a z. B. designed as an electric motor 18 separate drive 18 or it is z. B. by means of a belt or a chain of a z. B. also driven as an electric motor 19 Druckwerkszylinderantrieb 19 driven, wherein the printing cylinder actuator 19 can drive one or more cooperating printing cylinder 12, wherein the printing cylinder 12 z. B. is formed as a forme cylinder 12. The printing cylinder 12 is z. B: designed as a double-circumference printing cylinder with a circumference between 1100 mm and 1300 mm, which corresponds to a diameter between 350 mm and 413 mm, and rotates driven by the printing cylinder drive 19 with a surface speed of at least 15 m / s, z. B. of 17 m / s and more, in particular up to 20 m / s, wherein the surface speed of the printing cylinder 12 preferably corresponds to the production speed of the printing press. The printing cylinder 12 rotates at 45,000 and more revolutions per hour. The film drive roller 01 driving the separate drive 18 or the associated with her printing unit cylinder drive 19 is preferably as a controlled, in particular as a position-controlled or as a torque-controlled electric motor 18; 19 trained.

The film roller 01 is with its separate drive 18 or with the printing cylinder actuator 19 preferably via a torsionally flexible coupling 23 in functional connection, said coupling 23 in particular for compensation of major shaft displacements z. B. multi-part, in particular three-part, and / or doppelkardanisch is formed, this coupling 23 acts vibration damping and noise-reducing and thus contributes to a high level of smoothness. Is exemplary in the Fig. 4 in a perspective view of such a coupling 23 is shown. Fig. 5 shows such a coupling 23 in a mounted on the film roll 01 state, wherein the film roll 01 is arranged in a printing press. Like in the Fig. 3 1 is shown in a roller train of a film inking unit 11 the ink fountain roller 13th subsequently arranged film roller 01 of the ink fountain roller 13 in a variably adjustable gap-shaped distance a set. Both the separate drive 18 and the printing cylinder drive 19, with which the film roller 01 can each be in a functional connection, is arranged stationarily in the printing press. After their adjustment in terms of their distance a to the ink fountain roller 13, the film roller 01 is also fixed in the film inking unit 11. The respectively arranged between the film roller 01 and the separate drive 18 or the printing cylinder actuator 19 clutch 23 compensates for the change in the position with respect to the distance a to the ink fountain roller 13 position of the film roller 01 to the separate drive 18 or to the printing unit cylinder drive 19.

The main body 04 of a roller 01 with a lateral surface 02 made of an elastomer material, in particular a film roller 01 with a lateral surface 02 made of an elastomer material, z. Example of a metal, in particular a steel, said roller 01 is cooled in particular when used in a producing at a higher production speed in the range of 15 m / s to 20 m / s rotary printing press. For a roller 01 with an axial length L in the range between 1,000 mm and 2,600 mm, it is recommended, for reasons of otherwise very large mass and / or reasons of rigidity as a material for the main body 04 of the roller 01 to use a plastic, for , Example, a fiber composite material, preferably a CFRP material, ie a carbon fiber reinforced plastic, wherein in a base material of a plastic, ie a matrix, wherein the matrix z. B. consists of a thermoset, in particular of an epoxy resin, at least one mat of carbon fibers is embedded. In most cases, several layers of carbon fibers to reinforce the base material are embedded in the same. The fiber composites are z. B. made by winding. The density of a CFRP material is usually less than 20% of that of a steel, so that a roller 01 made of a CFRP material has a comparatively low mass. However, a roller 01 with a base body 04 made of a CFRP material can be due to the poor thermal conductivity of the CFRP material does not cool in the same way at least not with the same efficiency as a roller 01 with a base body 04 made of a heat-conducting steel. In order to obtain a relatively near-surface cooling with a good heat transfer coefficient, it is proposed to provide the base 04 of a roll 01 consisting of a CFRP material at least in a region close to its outer surface 02 consisting of an elastomer material with at least one thermal bridge incorporated into the main body 04 so that on the lateral surface 02 of the roller in 01 in the production operation of the printing press resulting process heat transferred to the interior of the roller 01 and there by a z. B. caused by a flowing fluid cooling from the roller 01 can be removed.

Fig. 6 exemplifies one of a flowing fluid, e.g. B. a water-cooled roller 01, in particular film roller 01. On both sides of the roller 01 arranged cylindrical pin 26 are z. B. mounted in frame walls of the printing press at least rotatably. The pins 26 are each connected to a cylindrical carrier tube 28-front side, disk-shaped covers 27 of the roller 01 connected. The pins 26 and the lid 27 are usually made of a metal, for. B. made of a steel. The covers 27, together with the sleeve-shaped carrier tube 28 extending between them and layers arranged on the carrier tube 28, form the main body 04 of the roller 01. At least one of the layers arranged on the carrier tube 28 consists of a CFRP material. The support tube 28 may be made of metal, for. As a steel, or consist of a CFRP material. The main body 04 of the roller 01 has on the outside a coating 03 made of an elastomer material, wherein this layer thickness S having coating 03 (FIG. Fig. 1 ) which participates in the transport of a printing ink 14 or a fountain solution lateral surface 02 of the roller 01, wherein the arranged on the support tube 28 layer structure and the coating 03 of the elastomer material over the entire axial length L of the roller 01 or only over a part of this length L can extend.

On at least one of the pin 26 of the roller 01 is preferably in the center z. B. through a bore 29, a supply of a cooling medium to the roller 01, z. As a flowing fluid, in particular of water, wherein the cooling medium, the roller 01 along a line 31 z. B. initially flows through axially and then z. B. essentially via at least one preferably executed in one of the lid 27 radial bore 32 is introduced into the arranged on the support tube 28 layer structure, in order then via a further preferably in the other lid 27 executed radial bore 33 and formed on this cover 27 pin 26th to be derived from the roller 01 at an outlet opening 34. Feeder 29 and outlet opening 34 for the cooling medium can either at the same end face of the roller 01, z. B. on the operator side of the printing press, or be arranged on opposite end faces of the roller 01, wherein the supply 29 and the outlet opening 34 z. B. with a flow rate and / or the flow rate and / or the temperature of the cooling medium regulating temperature control system (not shown) are connected. In the arranged on the support tube 28 layer structure is preferably at least one of the cooling medium flowed through channel 36, wherein the at least one channel 36, the cylindrical support tube 28 z. B. spirals or arranged in the layer structure parallel to the axial length L of the roller 01.

Embodiment variants of the layer structure arranged on the carrier tube 28 and preferably of a plurality of channels 36 arranged in the layer structure are shown in FIGS Fig. 7 to 12 each shown in a longitudinal section and in an associated cross-section.

Fig. 7 shows a detail z. B. a film roll 01, wherein the layer structure of a plurality of layers 37; 38, wherein each one of the layers 37 of a CFK material and another layer 38 of a heat-conducting material are arranged alternately one another. Each of the layers 38 of the heat-conducting material is z. B. from a braid 38 made of a metal, for. As copper or an iron material, said braid 38 is incorporated continuously in the manufacturing process of the existing of a CFRP film roller 01. In the in the Fig. 7 shown example, starting from a flowed through by the cooling medium carrier tube 28 of the film roll 01 first, a layer 38 of the heat-conducting material and coaxially a layer 37 of the CFRP material, where again coaxial another layer 38 is arranged from the heat-conducting material. Up to the outer, consisting of the elastomer material coating 03 of the body 04 of the film roller 01 follow so coaxially one above the other alternately z. B. four layers 38 of the heat-conducting material and four layers 37 of the CFRP material. The layers 38 of the heat-conducting material in this way each form a thermal bridge between the existing of a CFRP material layers 37.

Fig. 8 also shows like that Fig. 7 a section of a film roll 01, wherein the layer structure of several layers 37; 38, wherein in each case one of the layers 37 made of a CFK material and another layer 38 of a heat-conductive material are arranged alternately one another. In contrast to Fig. 7 is in the embodiment according to the Fig. 8 a substantially thicker layer 37 is provided from the CFRP material, whereupon in the manner described above, some layers 37; 38 of the heat-conducting material and CFK material coaxially one above the other to the outer, consisting of the elastomer material coating 03 of the body 04 of the film roller 01 follow.

Fig. 9 shows a film roll 01 according to the embodiment according to the Fig. 8 , Wherein at least one of the carrier tube 28 spirally encircling channel 36 is arranged for the flow of the cooling medium in at least one of the existing CFK material layers 37. Since the at least one channel 36 is arranged between two heat-conducting material consisting of layers 38, there is in this embodiment, a good cooling effect with respect to the of the lateral surface 02 of the Roller 01 dissipated process heat.

Fig. 10 also shows a film roll 01 according to the embodiment according to the Fig. 8 , wherein at least one of the layer structure of the film roll 01 axially passing through channel 36 is arranged for the flow of the cooling medium at least in one of the existing CFK material layers 37 in the form of a linear feedthrough. Here, too, the at least one channel 36 is arranged between two layers 38 consisting of the heat-conducting material.

Fig. 11 shows a film roll 01, the embodiment according to the Fig. 8 is similar, but coaxially around the support tube 28 preferably only made of the CFK material layers 37 are arranged, at least in one of these layers 37 at least one carrier tube 28 spirally encircling channel 36 is arranged for the flow of the cooling medium. The at least one spirally encircling channel 36 is arranged close to the lateral surface 02 of the roller 01 and preferably has a comparatively small diameter D36 and a small pitch s36 in order to minimize the stiffness of the film roller 01, which consists to a considerable extent of the CFRP material to impair and to obtain the most homogeneous possible cooling in the lateral surface 02 of the roller 01 near range.

Fig. 12 shows one of the Fig. 11 Similar embodiment of the film roll 01, wherein at least in one of the existing CFK material layers 37, preferably in one of the lateral surface 02 of the roller 01 near layers 37, at least one of the layer structure of the film roll 01 axially flowing channel 36 for the flow of the cooling medium is arranged. In the embodiments of the film roller 01 according to the Fig. 11 or 12 However, at least one layer 38 of the heat-conducting material may be provided in the layer structure of the film roller 01.

Fig. 13 shows again, ie in a second embodiment, an example Film inking unit 11, which in the Fig. 3 is largely similar. However, in this example follows the ink fountain roller 13 in the compactor a film roller 01, which has a jacket surface 08 made of ceramic, copper or a hard plastic. The plastic of the lateral surface 08 of the film roller 01 is z. Example of a polyamide or polyacrylate, preferably from a Superpolyamid. At least the hardness of existing from a plastic shell surface 08 is z. B. in the range between 70 and 80 Shore D, this hardness and its test method according to DIN 53505 is defined. The lateral surface 08 of the film roller 01 may be formed as a coating applied to a roll core coating, said coating having a layer thickness z. B. in the range between 1 mm and 2 mm. The film roller 01 is in contact with the roller 17 downstream of it in the roller train. Preferably, the film roll 01 and the roller 17 downstream of it in the roller train with a contact force against each other employed, wherein the contact pressure in the form of a in the axial direction of the juxtaposed rollers 01; 17 may be up to 2,000 N / m, preferably between 200 N / m and 750 N / m. Due to the mutual contact between these two mutually employed rollers 01; 17 a flattened relative to a circumferential circle, in the axial direction of the juxtaposed rollers 01; 17 extending contact surface formed, which is also referred to as a roller strip, wherein the rolling surface 17 formed in particular on the lateral surface 02 of the roller 17 with the elastomer material rollers in the circumferential direction of this roller 17 have a width between 2 mm and 11 mm, preferably between 5 mm to 8 mm can.

The lateral surface 08 of the film roller 01 has a regular structure formed by grooves 09, wherein the grooves 09 can have a depth in the range between 300 μm and 500 μm. The grooves 09 are preferably inclined by a pitch angle in the range between + 25 ° to + 40 ° or -25 ° to -40 °, starting from a plane perpendicular to the axis of the film roller 01. The grooves 09 are preferably parallel, with adjacent grooves 09 at a distance in the range between 1 mm and 2.5 mm are arranged. However, it can also be provided intersecting grooves 09, wherein the intersecting grooves 09, the lateral surface 08 of the film roller 01 in a diamond pattern structure. Such a diamond pattern formed by grooves 09 on the lateral surface 08 of the film roller 01 is exemplary in the Fig. 14 presented in the form of a section.

The ink fountain roller 13 has a lateral surface z. Example of ceramic, steel or chrome, wherein in the case of a jacket surface formed of chromium, these a hardness of z. B. 60 Rockwell or more. The ink fountain roller 13 has a lower surface speed than the film roller 01. The surface speeds of Farbduktor 13 and film roller 01 are in a ratio z. From 1: 3 to 1:10. It is preferably provided that the ink fountain roller 13 is independently and independently of the other rollers arranged in the roller train of the film inking unit 11 driven by a motor 18. The film roll 01 may also have a separate motor 18 or be drivingly coupled either to the drive 18 of the ink fountain roller 13 or to the drive 19 of the other rollers arranged in the roller train of the inking unit 11. It can be provided that in the compactor of the film inking unit 11, a distribution cylinder 24 is arranged, which z. B. has its own drive 18 or z. B. is driven by the drive 19 of the rest in the roller train of the film inking unit 11 arranged rollers. In the Fig. 13 Let the dash-dotted lines emanating from the motor 18 indicate the previously described variants in the drive concept, namely that the ink fountain roller 13, the film roller 01 or the distribution cylinder 24 can each have a separate drive 18. The film roller 01 in the roller train downstream roller 17 is z. B. also with the distribution cylinder 24 in a touching contact. It is driven either by the film roller 01 or the friction cylinder 24 or by both rotationally by friction.

The ink fountain roller 13 and / or the distribution cylinder 24 are z. B. flows through a temperature control. The ink fountain roller 13 and / or the roller 17 downstream of the film roller 01 in the roller train may have a roller core made of a CFRP material, which in particular with an axial length of the respective roller 01; 13 of 1,000 mm and more leads to a significant weight reduction.

In a particularly advantageous embodiment of the film inking unit 11 is provided that the film roller 01 adjacent roller 17 has a lateral surface 02 made of an elastomeric material, wherein the elastomeric material in a stochastic distribution a plurality of the lateral surface 02 open, directed into the interior of this roller 17 cavities 07, wherein in the transfer of the ink 14, the grooves 09 on the lateral surface 08 of the film roller 01 and cavities 07 of their adjacent roller 17 mesh or are brought to at least partial coverage. The structured outer surface 08 of the film roller 01 and provided with cavities 07 elastic lateral surface 02 of the adjacent roll 17 mesh so that in their mutual employment in the roll strip formed by them into each other.

The arranged in a printing press roller 01; 17; 22 with a lateral surface 02 made of an elastomer material transmits a fluid film applied to its lateral surface 02, wherein the elastomer material in a stochastic distribution has a large number open on the lateral surface 02, into the interior of this roller 01; 17; 22 directed cavities 07 has. In an advantageous embodiment, a sum over the respective void volume of all existing on the lateral surface 02 cavities 07 is greater than one of the lateral surface 02 of this roller 01; 17; 22 transferred volume of the fluid. It can also be provided that the cavities 07 present on the lateral surface 02 have flanks with surfaces in contact with the fluid film, wherein the fluid film with a layer thickness of less than 500 μm is that of the lateral surface 02 and the faces of the flanks Cavities 07 formed relief on the outer surface 02 and the surfaces of the flanks rests. In both cases, the lateral surface 02 of the roller 01; 17; 22 coated or wetted only with ink 14. The in the interior of the roller 01; 17; 22 directed cavities 07 are not completely filled with this ink 14 when transferring ink 14. The one of the Roller 01; 17; 22 to be transferred fluid film, in particular color film, although on the lateral surface 02 of this roller 01; 17; 22 preferably closed in itself, but by the relief of the lateral surface 02 of this roller 01; 17; 22 modeled and thus forms on the circumference of this roller 01; 17; 22 no uniform radial level, as it is at a z. B. abgerakelten lateral surface 02 of this roller 01; 17; 22 would be the case. A roller 01; 17; 22 with these features mentioned here for their transport of printing ink 14 carries in particular in combination with a roller 01, the lateral surface 08 is structured by grooves 09, these two rollers 01; 17; 22 are employed against each other, to help that, especially at a higher surface speed of at least 10 m / s, the tendency to squirt ink 14 is effectively reduced.

LIST OF REFERENCE NUMBERS

01

Roller, film roller

02

lateral surface

03

coating

04

body

05

-

06

axis of rotation

07

cavity

08

lateral surface

09

groove

10

-

11

Inking unit, film inking unit

12

Printing cylinder, form cylinder

13

ink fountain roller

14

printing ink

15

-

16

Paint reservoir, ink fountain, paint tray

17

ink roller

18

Drive, motor, electric motor

19

Printing cylinder drive, electric motor

20

-

21st

dampening

22

Inking roller

23

clutch

24

distribution cylinder

25

-

26

spigot

27

cover

28

support tube

29

supply

30

-

31

management

32

radial bore

33

radial bore

34

outlet opening

35

-

36

channel

37

Layer made of CFRP material

38

Location, braid

D

Outer diameter (01)

L

Length (01)

S

Layer thickness (01)

a

distance

l

edge length

D36

diameter

s36

Gradient (36)

t0

depth

t1

Depth (07)

Claims (51)

1. Continuous-feed inking unit (11) of a printing press having a roller train consisting at least of an ink duct roller (13), a continuous-feed roller (01) and at least one roller (17; 22) arranged downstream of the continuous-feed roller (01) in the roller train on the transport path of the printing ink (14), this downstream roller (17; 22) having a peripheral surface (02) comprising an elastomer material, the elastomer material having a multiplicity of randomly distributed cavities (07) which are open at the peripheral surface (02) and are directed into the interior of this roller (17; 22), the cavities (07) made in the peripheral surface (02) forming flanks, characterized in that the flanks of the cavities (07) of the roller (17; 22) have different slope angles in the range between 0° and 90° in an irregular distribution relative to a reference surface defined as a cylindrical surface, the reference surface being arranged on the circumference of the roller (17; 22) having the external diameter (D).
2. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the randomly distributed cavities (07) has a length (L) in the range from 1000 mm to 2600 mm in its axial direction.
3. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the randomly distributed cavities (07) has an external diameter (D) in the range between 50 mm and 300 mm.
4. Continuous-feed inking unit (11) according to Claim 1, characterized in that the peripheral surface (02) of the roller (17; 22) having the randomly distributed cavities (07) transports the printing ink (14) in a fluid film applied uniformly to it.
5. Continuous-feed inking unit (11) according to Claim 4, characterized in that the fluid film applied to the peripheral surface (02) has a layer thickness of less than 500 µm.
6. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) made in the peripheral surface (02) of the roller (17; 22) arranged downstream of the continuous-feed roller (01) are made by a cutting method or a turning method or a milling method or a grinding method or a blasting method or an embossing method.
7. Continuous-feed inking unit (11) according to Claim 1, characterized in that the flanks of the cavities (07) made in the peripheral surface (02) of the roller (17; 22) arranged downstream of the continuous-feed roller (01) are in the form of surfaces transporting printing ink (14).
8. Continuous-feed inking unit (11) according to Claim 7, characterized in that the surfaces of the flanks of the cavities (07) increase the size of the peripheral surface (02) of the roller (17; 22) having the respective cavities (07), which peripheral surface (02) is in contact with the printing ink (14), at least by 20%.
9. Continuous-feed inking unit (11) according to Claim 7, characterized in that the surfaces of the flanks of the cavities (07) at least double the peripheral surface (02) of the roller (17; 22) having the respective cavities (07), which peripheral surface (02) is in contact with the printing ink (14).
10. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) form an empty surface fraction of not more than 35% relative to the reference surface.
11. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) form an empty surface fraction of between 20% and 30% relative to the reference surface.
12. Continuous-feed inking unit (11) according to Claim 1, characterized in that a radial depth (t1) of the cavities (07) made in the peripheral surface (02) of the roller (17; 22), relative to the reference surface, is up to 400 µm.
13. Continuous-feed inking unit (11) according to Claim 1, characterized in that a radial depth (t1) of the cavities (07) made in the peripheral surface (02) of the roller (17; 22), relative to the reference surface, is between 50 µm and 300 µm.
14. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) have an empty volume of at least 50 000 mm³ per m² of its reference surface.
15. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) have an empty volume of at least 100 000 mm³ per m² of its reference surface.
16. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) have an empty volume of at least 150 000 mm³ per m² of its reference surface.
17. Continuous-feed inking unit (11) according to Claim 1, characterized in that the arrangement of the cavities (07) on the peripheral surface (02) of the roller (17; 22) has a preferred direction following processing webs, the processing webs having an angle of inclination in the range from +45° to +90° or -45° to -90°, starting from a perpendicular to the axis (06) of rotation of the roller (17; 22).
18. Continuous-feed inking roller (11) according to Claim 17, characterized in that the angle of inclination of the preferred direction for the arrangement of the cavities (07) is in opposite directions at the two opposite edges of the roller (01).
19. Continuous-feed inking unit (11) according to Claim 1, characterized in that the cavities (07) on the peripheral surface (02) of the roller (17; 22) are nonuniform.
20. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) consists of rubber.
21. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) consists of plastic.
22. Continuous-feed inking unit (11) according to Claim 21, characterized in that the plastic is in the form of a polymer or in the form of a polyadduct.
23. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) has viscoelastic behaviour.
24. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) is applied in the form of a coating (03) to a base body (04) of this roller (17; 22).
25. Continuous-feed inking unit (11) according to Claim 24, characterized in that the coating (03) of the roller (17; 22) having the cavities (07) has a layer thickness (S) in the range between 1 mm and 15 mm.
26. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the cavities (07) has an average peak-two-valley height (R_z) in the range from 20 µm to 100 µm on the surface of its elastomer material.
27. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) has a hardness in the range between 25 and 60 Shore A.
28. Continuous-feed inking unit (11) according to Claim 1, characterized in that the elastomer material of the roller (17; 22) having the cavities (07) has a hardness in the range between 30 and 50 Shore A.
29. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the cavities (07) is in the form of a transfer roller (17) or in the form of an application roller (22).
30. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the cavities (07) is arranged in a rotary printing press printing in an offset printing process.
31. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the cavities (07) is arranged in a rotary printing press used in newspaper printing or in job printing.
32. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the cavities (07) is arranged in a rotary printing press producing at a production speed in the region of more than 10 m/s, in particular between 15 m/s and 20 m/s.
33. Continuous-feed inking unit (11) according to Claim 1, characterized in that the empty surface fraction and/or the empty volume of the cavities (07) is adapted to the rotational speed provided for this roller (17; 22) having cavities (07) on the basis of the production speed of the printing press.
34. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17) arranged downstream of the continuous-feed roller (01) is in contact with the continuous-feed roller (01).
35. Continuous-feed inking unit (11) according to Claim 1, characterized in that the continuous-feed roller (01) has a peripheral surface (08) comprising a rigid plastic.
36. Continuous-feed inking unit (11) according to Claim 35, characterized in that the plastic of the peripheral surface (08) of the continuous-feed roller (01) is a polyamide or polyacrylate.
37. Continuous-feed inking unit (11) according to Claim 1, characterized in that the peripheral surface (08) of the continuous-feed roller (01) is in the form of a coating applied to a roller core.
38. Continuous-feed inking unit (11) according to Claim 37, characterized in that the coating of the peripheral surface (08) of the continuous-feed roller (01) has a layer thickness in the range between 1 mm and 2 mm.
39. Continuous-feed inking unit (11) according to Claim 1, characterized in that the peripheral surface (08) of the continuous-feed roller (01) has a regular structure formed by grooves (09).
40. Continuous-feed inking unit (11) according to Claim 39, characterized in that the grooves (09) have a depth in the range between 300 µm and 500 µm.
41. Continuous-feed inking unit (11) according to Claim 39, characterized in that the grooves (09) are arranged inclined at a slope angle in the range between +25° and +40° or -25° to -40°, starting from a plane perpendicular to the axis of the continuous-feed roller (01).
42. Continuous-feed inking unit (11) according to Claim 39, characterized in that the grooves (09) are parallel, adjacent grooves (09) being arranged at a distance in the range between 1 mm and 2.5 mm.
43. Continuous-feed inking unit (11) according to Claim 39, characterized in that intersecting grooves (09) are provided, the intersecting grooves (09) structuring the peripheral surface (08) of the continuous-feed roller (01) in a diamond pattern.
44. Continuous-feed inking unit (11) according to Claim 1, characterized in that the continuous-feed roller (01) is driven by a drive (18) individually or together with another rotational body of the printing press.
45. Continuous-feed inking unit (11) according to Claim 1, characterized in that the continuous-feed roller (01) is driven by a drive (19) of a printing unit cylinder (12) of the printing press.
46. Continuous-feed inking unit (11) according to Claim 1, characterized in that the continuous-feed roller (01) is driven by friction exerted by an adjacent rotational body of the printing press.
47. Continuous-feed inking unit (11) according to Claim 1, characterized in that the ink duct roller (13) or the continuous-feed roller (01) has a drive independent of the drive (19) of the printing unit cylinder (12).
48. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the randomly distributed cavities (07) has a support tube (28) comprising a plastic, in particular comprising a fibre composite material.
49. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the randomly distributed cavities (07) has a support tube (28) comprising a CEK material and has a journal (26) comprising metal on each end face.
50. Continuous-feed inking unit (11) according to Claim 1, characterized in that the roller (17; 22) having the randomly distributed cavities (07) has at least one channel (36) through which a cooling medium flows.
51. Continuous-feed inking unit (11) according to Claim 50, characterized in that the at least one channel (36) runs in the form of a spiral around the support tube (28) or is arranged parallel to the axial length (L) of the roller (17; 22).

Images