Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F13/00—Common details of rotary presses or machines
  • B41F13/08—Cylinders
  • B41F13/085—Cylinders with means for preventing or damping vibrations or shocks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
  • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F7/00—Rotary lithographic machines
  • B41F7/02—Rotary lithographic machines for offset printing
  • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
  • B41N10/02—Blanket structure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
  • B41N10/02—Blanket structure
  • B41N10/04—Blanket structure multi-layer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
  • B41N2207/02—Top layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
  • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
  • B41N2210/02—Top layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
  • B41N2210/04—Intermediate layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
  • B41N2210/10—Location or type of the layers in multi-layer blankets or like coverings characterised by inorganic compounds, e.g. pigments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
  • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
  • B41N7/00—Shells for rollers of printing machines
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component

Definitions

• Elevator on a roller arrangements of the roller to a second roller and printing units of a printing press with the roller
• the invention relates to an elevator on a roller, arrangements of the roller to a second roller and printing units of a printing press with the roller according to the preamble of claims 1, 8, 10, 13 and 34.
• a printing blanket which consists of several layers and, in extreme cases, has a total thickness of 0.55 to 3.65 mm.
• the elastic modulus of layers of cellular rubber is between 0.2 to 50 MPa and 0.1 to 25 MPa. Due to the special structure of the printing blanket and the properties of the layers, a printing blanket is obtained which, when pressed together, does not tend to shift or protrude laterally.
• DE 19 40 852 A1 discloses a printing blanket for offset printing, which has a total thickness of approximately 1.9 mm.
• a shear modulus as tension at 0.25 mm deformation is given in the case of a thickness of the printing blanket with approx. 4.6, 1.9 or 8.23 kg / cm 2 .
• the aim here is to achieve a rapid regression after an indentation as well as a narrow thickness tolerance.
• ink or other fluids between two rollers of a printing press e.g. B. in the dyeing and / or dampening unit and in particular in the offset process between printing unit cylinders, regularly resorted to the material combination hard-soft.
• the surface pressure required for ink transfer is achieved by pressing in a resilient, e.g. B. elastomeric layer (soft elastomeric cover / elevator, rubber blanket, metal printing blanket, sleeve) on an interacting roller with largely incompressible and non-elastic outer surface.
• An important criterion for the even transition of the fluid is a setting force specified in narrow areas and its constancy. Now occur fluctuations in the distance between the rollers acting together, for. B.
• the invention has for its object to provide an elevator for or on a roller, arrangements of this roller to a second roller and printing units of a printing press.
• the advantages that can be achieved with the invention consist in particular in that a lower sensitivity to changes or fluctuations in the contact force (surface pressure) is achieved, and thus a high quality of the printed product is easier to achieve and to maintain.
• the influence of the cylinder movements on the ink transfer can be reduced by means of special elevators, an optimized design of the cylinders and their arrangement. In a Particularly favorable embodiment with narrow points of interrupted or reduced contact, the vibration excitation itself is also reduced.
• the transmission of the fluid is influenced considerably less by vibrations due to the design of the elevator and / or the arrangement of the rollers with respect to one another.
• a spring characteristic curve ie an increase in the dependence of the surface pressure on the indentation, is at least 700 (N / cm 2 ) / mm, at least in an advantageous range for the indentation in the pressure-on position.
• An advantageous range of a relative indentation of the elevator in the operating state lies e.g. B. between 5% and 10%.
• different areas for the relative indentation can be preferred in order to achieve optimal results with regard to the required transition of the fluid with the smallest possible influence of fluctuations.
• the surface pressure varies in pressure-on position in an advantageous embodiment highest in a range between 60 and 220 N / cm 2 , or different sub-ranges for fluids, eg. B. printing inks, with very different rheological properties and / or different printing processes. In these areas or sub-areas in particular, the curve should meet the slope condition.
• a width of the contact zone in the nip resulting from the pressing of the rollers has hitherto been i. d. Usually kept as small as possible. A widened nip point brings with it a higher line force and thus a greater static deflection. However, this disadvantage is more than compensated for by the elevator or the arrangement according to the invention.
• a width of the nip is z. B. in an advantageous embodiment at least 10 mm, in particular greater than or equal to 12 mm. An advantageous surface pressure can thus be achieved.
• an oscillation due to a disturbance e.g. B. an interruption, induced on one of the lateral surfaces of the rollers acting directly or via a web
• the width of the interruption in the circumferential direction is at most a ratio of 1: 3 to the width of the nip (impression strip) resulting from the pressing.
• the elevator or the layer allows the use of slimmer or longer printing cylinders, i. H. a large length of the cylinder compared to the diameter.
• Fig. 1 is a schematic representation of the line force between two rollers Using a conventional elevator
• Figure 2 is a schematic representation of the line force between two rollers using an elevator according to the invention.
• Fig. 4 embodiment for a printing unit
• Fig. 5 embodiment for a printing unit
• Fig. 7 embodiment for a printing unit
• FIG. 8 Schematic representation of an elevator with a support layer.
• a work machine e.g. B. a printing press, has rolling rollers 01; 02 on which a nip 03, z. B. form a nip 03.
• the printing press rollers 01; 02 of an inking unit, a coating unit, or cylinder 01; 02 of a printing unit rollers 01; 02 of an inking unit, a coating unit, or cylinder 01; 02 of a printing unit.
• the cylinders 01; 02 represents a forme cylinder 01 with an effective diameter D w pz and a transfer cylinder 02 of an offset printing unit.
• One of the cylinders 01; 02 e.g. B.
• the transfer cylinder 02 has on the outer surface of a largely incompressible, non-elastic core 04 with a diameter D G ZK an elevator 05 or coating 05 with a soft, elastomeric layer 06 of a thickness t.
• a total thickness T of the elevator 05 is z. B. from the thickness t of the layer 06 and a thickness of an optionally incompressible, inelastic carrier layer 10 connected to the layer 06, for example one Metal plate, (exemplarily shown in Fig. 8) together. If the elevator 05 does not have an additional carrier layer 10, the thickness t corresponds to the total thickness T.
• the layer 06 can be constructed as an inhomogeneous layer 06, which in total has the required property for the layer 06.
• the effective diameter D W GZ is determined on the outer surface of the forme cylinder 01 which is effective for the unrolling and optionally includes one applied to the outer surface of a base body 07 Elevator 08, e.g. B. a printing form 08.
• the cylinder 01 hard surface can also be designed as a counter-pressure cylinder 01 cooperating with the transfer cylinder 02.
• the version of the layer 06 described below is however not related to the version of the rollers 01; 02 as transfer and form cylinder 01; 02 or tied to the version with a printing form 08.
• a profile for a surface pressure P in the nip of the two rollers 01 and 02 is shown schematically.
• the surface pressure P extends over the entire area of the contact zone, reaching a maximum surface pressure P max when stationary at the level of a connecting plane V of the axes of rotation. During production, this shifts to the incoming gap side due to the viscous proportion of the force.
• the contact zone and thus the profile have a width B.
• the maximum surface pressure P max is ultimately responsible for the color transfer and adjust accordingly.
• FIG. 2 shows schematically the profile of the surface pressure P in the case of a larger indentation S, which at the same time causes the width B to widen. If the maximum surface pressure P ma ⁇ is nevertheless to be achieved, the integration of the surface pressure P over the entire width B leads to an increase in a force between the two rollers 01; 02.
• the absolute level of the surface pressure P in the nip 03 and its fluctuation when the indentation S is varied is largely determined by a spring characteristic of the layer 06 used or of the elevator 05 used with the layer 06.
• the spring characteristic curve represents the surface pressure P as a function of the indentation S.
• FIG. 3 some spring characteristic curves of conventional elevators 05, in particular pressure levers 05 with a corresponding layer 06, are shown by way of example. The values are determined on a quasi-static stamp test bench in the laboratory. They are to be transferred in a suitable manner to values determined in another way.
• a slope ⁇ P / ⁇ S of the spring characteristic curve determines the fluctuation in the surface pressure P when the indentation S changes (for example in the case of vibration).
• the magnitude of a fluctuation ⁇ P in the required maximum surface pressure P max in the nip 03 around the average surface pressure P is approximately proportional to the slope ⁇ P / ⁇ S of the spring characteristics at point S.
• an elevator a FIG. 3
• Elevators 05 which as a whole or their layer 06 as such has a large slope ⁇ P / ⁇ S, in particular in the area of the required maximum surface pressure P max in the pressure-relevant area, are hereinafter referred to as “hard”, those with a small slope ⁇ P / ⁇ S referred to as "soft”.
• Elevator 05 or layer 06 is now designed as a "soft" elevator 05 or "soft” layer 06.
• the same relative movements of the rollers 01; 02 thus leads to a smaller change in the surface pressure P in a soft elevator 05 and thus to a reduction in the fluctuations
• the soft elevator 05 thus brings about a lower sensitivity of the printing process to vibrations and / or deviations at intervals from a setpoint value, because of smaller changes in the surface pressure P due to relative movements of the rollers 01, 02, for example, there are oscillation strips in the printed product in the case of soft elevators 05 or with elevators 05 with a soft layer 06 only visible with larger vibration amplitudes.
• the surface pressure varies in the pressure-on position at most in a range between 60 and 220 N / cm 2 .
• the range for wet offset varies. B. between 60 and 120 N / cm 2 , in particular from 80 to 100 N / cm 2 , while in the case of dry offset (no fountain solution, only ink application on the forme cylinder) z. B. between 100 and 220 N / cm 2 , in particular 120 to 180 N / cm 2 . In these areas in particular, the slope should meet the condition of the slope.
• the pressure-relevant range for the surface pressure P max is advantageously between 60 to 220 N / cm 2 .
• fluids e.g. B. printing inks
• different areas within the above range for Surface pressure may be preferred.
• the range for wet offset varies. B. between 60 and 120 N / cm 2 , in particular from 80 to 100 N / cm 2 (shown shaded in Fig. 3), while for the case of dry offset z.
• B. varies between 100 and 220 N / cm 2 , in particular from 120 to 180 N / cm 2 .
• a soft elevator 05 (or its layer 06) has an inclination ⁇ P / ⁇ S of z.
• the layer 06 has a greater thickness t and the elevator 05 has a greater overall thickness T than has been customary hitherto.
• the thickness t of the layer 06 which is functional with regard to the elasticity or compressibility is, for example, 3.0 to 6.3 mm, in particular 3.7 to 5.7 mm.
• the strength of one or more u. U. connected to the layer 06 essentially incompressible and inelastic layers on the side facing the core 04, which are connected to the layer 06 for the purpose of dimensional and / or dimensional stability (not shown).
• This carrier layer 10 or carrier layers 10 which is effective not for the “softness” of the elevator, but for the dimensional stability, can also be arranged between the “soft” layers.
• the fabric can be 0.1 to 0.6 mm thick.
• the indicated thickness t of layer 06 relates to the sum of the “partial layers” that are functionally responsible for the above-described characteristic (dependence on surface pressure / indentation) and the elasticity or compressibility Carrier layer (s) 10 the total thickness T of 3.5 to 6.5 mm, in particular 3.9 to 5.9 mm.
• the "soft" elevator 05 (or layer 06) is preferably operated with a higher indentation S compared to conventional indentations S (shown schematically in FIG. 2 compared to FIG.
• the two rollers 01, 02 are covered on their respective effective but undisturbed diameter D wG z, D wPZ further adjusted to one another, thereby achieving an optimal maximum surface pressure P max despite a smaller pitch ⁇ P / ⁇ S.
• the rollers 01, 02 are advantageously positioned against each other in such a way that the Indentation S amounts to at least 0.18 mm, for example 0.18 to 0.60 mm, in particular 0.25 to 0.50 mm.
• a relative indentation S * i.e. H. the indentation S related to the thickness t of layer 06 lies e.g. B. without taking into account the special design of the rollers 01; 02 z. B. between 5% and 10%, but in particular between 6% and 8%.
• a width B of the contact zone resulting from indentation S of the layer 06 in a projection perpendicular to a connection plane V of its axes of rotation is in an advantageous embodiment at least 5% of the undisturbed effective diameter D WGZ of the roller 02 with layer 06.
• the design and / or arrangement of the "soft" elevator 05 is particularly advantageous if one of the two co-operating rollers 01; 02 (or both) has at least one disturbance 09; 11 influencing the unwinding on its effective outer surface.
• This disturbance 09; 11 can be an interruption 09; 11, an axially extending joint 09; 11 of two ends of one or more elevators 05; 08.
• the disturbance 09; 11 can be caused by an axially extending channel 09; 11 for fastening ends of one or several elevators 05; 08.
• This channel 09; 11 has an opening through which the ends are guided towards the lateral surface.
• Inside the channel 09; 11 can be a device for clamping and / or tensioning the elevator 05; 08 or the elevators 05; 08.
• width B09; B11 of channel 09; 11 is particularly advantageous to change the width B09; B11 of channel 09; 11 to be chosen smaller than the width B of the contact zone.
• at least areas of the cooperating lateral surfaces in the contact zone are always supported on one another, in addition there is a weakening in height and a flatter course (broadening of the impulse) for the force of the stroke excitation.
• Softer lifts 05 or softer layers 06 thus lead to a weakening and a lengthening of the channel run in the case of narrow channels 09 11.
• the channel 11 can then be extremely narrow in the circumferential direction, for. B. less than or equal to 5 mm, in particular less than or equal to 3 mm.
• the channel 09 is designed in an advantageous embodiment with a width in the circumferential direction of less than or equal to 5 mm, in particular less than or equal to 3 mm.
• the larger contact zone (width of the imprint strip) compared to conventional positions reduces the permissible ratio B09: B or B11: B.
• An embodiment is particularly advantageous, the width B09; B11 of channel 09; 11 in the area of its opening or mouth to the outer surface of the core 04 or base body 07 in the circumferential direction at most in a ratio of 1: 3 to the width B of the contact zone (impression strip) created by the pressing.
• the soft layer 06 preferably has a reduced damping constant compared to the materials normally used, so that despite the higher loading and unloading speeds occurring due to the higher indentation S when rolling, no higher flexing heat is generated.
• the layer 06 must be designed in such a way that a sufficiently rapid regression or resilience takes place after it has passed through the nip 03 into the initial position, so that, for example, the initial thickness is again present when it comes into contact with an ink roller or another cylinder.
• FIG. 4 and 5 show a printing unit 12 configured in an advantageous manner with the layer 06 and designed as a so-called double printing unit 12.
• the transfer cylinder 02 of a first pair of cylinders 01; 02 acts on a substrate 13, z. B. a web 13 together with a counter-pressure cylinder 14 also designed as a transfer cylinder 14, which is also associated with a forme cylinder 16.
• All four cylinders 01; 02; 14; 16 are driven mechanically independently of one another by means of different drive motors 17 (FIG. 4).
• forme and transfer cylinders 01; 02; 14; 16 each coupled in pairs by a paired drive motor 17 (on the forme cylinder 01; 16, on the transfer cylinder 02; 14 or in parallel) (FIG. 5).
• the forme cylinder 01; 16 and the transfer cylinder 02; 14 are in a first embodiment as cylinder 01; 02; 14; 16 double the scope, ie with a scope of essentially two standing printed pages, in particular of two newspaper pages. They have effective diameters D wG z; D wPZ between 260 to 400 mm, executed in particular 280 to 350 mm.
• the transfer cylinder 02; 14 each have at least one elevator 05 with a total thickness T of 3.5 to 6.5 mm, in particular 3.9 to 5.9 mm.
• the slope ⁇ P / ⁇ S of the spring characteristic is at least in the pressure-relevant range (see above) below 700 (Ncm 2 /) mm, in particular below 500 (Ncm 2 /) mm.
• Forme and transfer cylinder 01; 02; 14; 16 are arranged in pairs in such a way that the width B of the contact zone between the forme and transfer cylinder 01; 02; 14; 16 in the working position is 14 to 25 mm, in particular 17 to 21 mm. This configuration largely minimizes sensitivity to vibrations and inexact placement.
• the individual drives by the drive motor 17 support this through the mechanical decoupling.
• the forme cylinders 01; 16 and the transfer cylinder 02; 14 as cylinder 01; 02; 14; 16 simple scope, ie with a scope of essentially a standing print page, in particular from a newspaper page. They have effective diameters D wG z; D wPZ executed between 150 to 190 mm.
• the transfer cylinder 02; 11 On the outer surface of the core 04, the transfer cylinder 02; 11 each have at least one elevator 05 with a total thickness T of 3.5 to 6.5 mm, in particular 3.9 to 5.9 mm.
• the slope ⁇ P / ⁇ S of the spring characteristic is again at least in the pressure-relevant range (see above) below 700 (Ncm 2 /) mm, in particular below 500 (Ncm 2 /) mm.
• Forme and transfer cylinder 01; 02; 14; 16 are arranged in pairs in such a way that the width B of the contact zone between the forme and transfer cylinder 01; 02; 14; 16 in the position 10 to 18 mm, in particular 12 to 15 mm.
• the transfer cylinder 02; 14 in each case at least one elevator 05 with a total thickness T of 3.5 to 6.5 mm, in particular from 3.9 to 5.9 mm.
• the slope ⁇ P / ⁇ S of the spring characteristic is again at least in the pressure-relevant range (see above) below 700 (Ncm 2 /) mm, in particular below 500 (Ncm 2 /) mm.
• Forme and transfer cylinder 01; 02; 14; 16 are arranged in pairs in such a way that the width B of the contact zone between the forme and transfer cylinder 01; 02; 14; 16 in employment 12 to 20 mm, in particular 15 to 19 mm.
• a printing unit 19 is shown, which is either part of a larger printing unit, such as. B. a five-cylinder, nine-cylinder or ten-cylinder printing unit, or is operable as a three-cylinder printing unit 19.
• the transfer cylinder 02 acts here with a cylinder 18 not leading an ink, e.g. B. an impression cylinder 18 such as in particular a satellite cylinder 18 together.
• the "soft" outer surface of the transfer cylinder 02 now interacts with the "hard” outer surface of the forme cylinder 01 on one side and with the "hard” outer surface of the satellite cylinder 18 on the other side.
• the one or more satellite cylinders 18 have their own drive motor 17, while the pair of form and transmission cylinders 01; 02 is mechanically coupled by a common drive motor (FIG. 6), or in each case by its own Drive motor 17 are driven mechanically independently of one another (FIG. 7).
• Forme cylinder 01, transfer cylinder 02 and satellite cylinder 18 are in a first embodiment for FIG. 6 or 7 as cylinder 01; 02; 18 double circumference with effective diameters D WGZ ; D wPZ ; D ⁇ z between 260 to 400 mm, in particular 280 to 350 mm.
• the transfer cylinder 02; 11 each have at least one elevator 05 with a total thickness T of 3.5 to 6.5 mm, in particular 3.9 to 5.9 mm.
• the slope ⁇ P / ⁇ S of the spring characteristic is below 700 (Ncm 2 /) mm at least in the pressure-relevant range (see above), especially less than 500 (Ncm 2 /) mm.
• Forme and transfer cylinder 01; 02 and transfer cylinder 02; and satellite cylinders 18 are in each case positioned in pairs in such a way that the width B of the contact zone in the position of contact is in each case 14 to 25 mm, in particular 17 to 21 mm.
• forme cylinder 01, transfer cylinder 02 and satellite cylinder 18 are cylinders 01; 02; 18 simple scope, ie with a scope of essentially a standing print page, in particular from a newspaper page. They have effective diameters D WG Z; D wPZ ; D wSZ between 120 to 180 mm, in particular 130 to 170 mm.
• the transfer cylinder 02; 11 each have at least one elevator 05 with a total thickness T of 3.5 to 6.5 mm, in particular 3.9 to 5.9 mm.
• the slope ⁇ P / ⁇ S of the spring characteristic is at least in the pressure-relevant range (see above) again below 700 (Ncm 2 /) mm, in particular below 500 (Ncn 7) mm.
• Forme and transfer cylinder 01; 02 and transfer cylinder 02; and the satellite cylinders 18 are each positioned in pairs in such a way that the width B of the contact zone in the position of contact is 10 to 18 mm, in particular 12 to 15 mm.
• a printing press that works with soft and stronger elevators 05 or layers 06 thus has, for. B. changed, in particular enlarged cylinder undercuts (development, fabric thickness) and changed gap dimensions when switching on or off (fabric thickness, indentation). This also requires larger cylinder adjustment paths for the pressure-down position (greater indentation).
• the aforementioned elevator 05 or layer 06 is e.g. B. in a printing unit with one or more long but slim cylinders 01; 02; 14; 16 arranged.
• the forme cylinder 01; 16 and the transfer cylinder 02; 14 z. B. in the area of their bales each have a length that four or more widths of a printed page, for. B. a newspaper page, e.g. B. corresponds to 1,100 to 1,800 mm, in particular 1,500 to 1,700 mm.
• the diameter D WGZ ; D wPZ at least of the forme cylinder 01; 16 is z. B.
• the device is also advantageous for other dimensions in which the ratio between the diameter and length of the cylinder 01, 02; 14; 16; 18 is less than or equal to 0.16, in particular less than 0.12, or even less than or equal to 0.08.
• the length of the bale of the form and transfer cylinders is 01; 02; 14; 16 z. B. 1,850 to 2,400 mm, in particular 1,900 to 2,300 mm and is in the axial direction for receiving z. B. dimensioned at least six adjacent printed pages in broadsheet format.
• the diameter of at least the forme cylinder 01; 16 lies in a variant z. B. at 260 to 340 mm, especially at 280 to 300 mm, and in another variant z. B. at 290 to 380 mm, in particular at 300 to 370 mm, which corresponds to the circumference essentially two lengths of a newspaper page ("double circumference").
• a ratio of the diameter D wG z; D wPZ at least of the forme cylinder 01; 16 to its length is 0.11 to 0.17, in particular 0.13 to 0.16.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Printing Plates And Materials Therefor (AREA)
• Inking, Control Or Cleaning Of Printing Machines (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Printing Methods (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Manufacturing Of Printed Wiring (AREA)
• Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
• Rotary Presses (AREA)
• Press Drives And Press Lines (AREA)
• Lifting Devices For Agricultural Implements (AREA)
• Actuator (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Delivering By Means Of Belts And Rollers (AREA)

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  • 2003-04-09 DE DE50311073T patent/DE50311073D1/de not_active Expired - Lifetime
  • 2003-04-09 EP EP20060110183 patent/EP1669210B1/fr not_active Expired - Lifetime
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