EP0028421A1 - Dispositif encreur pour une machine à imprimer - Google Patents

Dispositif encreur pour une machine à imprimer Download PDF

Info

Publication number
EP0028421A1
EP0028421A1 EP80106790A EP80106790A EP0028421A1 EP 0028421 A1 EP0028421 A1 EP 0028421A1 EP 80106790 A EP80106790 A EP 80106790A EP 80106790 A EP80106790 A EP 80106790A EP 0028421 A1 EP0028421 A1 EP 0028421A1
Authority
EP
European Patent Office
Prior art keywords
roller
ink
transfer
transfer roller
metering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80106790A
Other languages
German (de)
English (en)
Other versions
EP0028421B1 (fr
Inventor
Harold Phillip Dahlgren
William Alexander Sullivan
John William Gardiner
James Edwin Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dahlgren Manufacturing Co Inc
Original Assignee
Dahlgren Manufacturing Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dahlgren Manufacturing Co Inc filed Critical Dahlgren Manufacturing Co Inc
Publication of EP0028421A1 publication Critical patent/EP0028421A1/fr
Application granted granted Critical
Publication of EP0028421B1 publication Critical patent/EP0028421B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/004—Driving means for ink rollers

Definitions

  • the invention relates to a method for metering printing ink which is to be applied to a printing plate by means of a shaping roller with an elastic surface, the elastic shaping roller being rotated at a surface peripheral speed which is substantially equal to the surface peripheral speed of the printing plate.
  • the invention further relates to an inking unit for a printing press, in which printing ink of low viscosity is applied to a printing plate.
  • the inking units of lithographic newspaper printing plates In order to combat the formation of so-called "ghosting", the inking units of lithographic newspaper printing plates generally have four form rollers which are in rolling engagement with a printing plate, each of the form rollers receiving color from one or more oscillating rollers in a single drum roller from rollers of different diameters.
  • This single drum roller is normally Ink is supplied via a duct roller which is oscillatingly engaged and disengaged from an ink film which is formed by a flexible blade which is pressed by means of so-called ink keys against the hard surface of a roller which is immersed in a color reservoir in this way to vary the use of color and to even out the color delivery.
  • the multi-roller inking units require complicated drives and are also relatively expensive in terms of their mode of operation, simply because of the drive power required to drive the rollers. There have also been difficulties in metering and evenly applying ink to the printing plates.
  • Inking units according to the U.S. patent application S.N. No. 918,228 dated June 23, 1978 "Reversible Newspaper Press” offer a remarkably improved ink metering and control, if only because with these inking units the ink is continuously fed to a single form roller via a speed-variable transfer roller.
  • the speed of the hard surface transfer roller can be adjusted to increase or decrease the amount of ink applied to an elastic surface form roller.
  • the present invention addresses the problem of reducing the power required to drive the rollers at different speeds in an inking unit of the type disclosed in US Patent Application 918,228, while maintaining the improved metering capability based on the slippage of the rollers should be preserved.
  • the improved construction of the inking unit has a metering roller and a transfer roller, of which one roller has a hard surface and the other an elastically resilient surface, both rollers being pressed against one another under pressure.
  • the metering roller can meter an excess of low viscosity paint into a flooded metering gap between the metering roller and the transfer roller, so that a uniform ink film is metered onto the surface of the transfer roller.
  • the ink film on the transfer roller is divided at a transfer nip between the transfer roller and an application roller and metered.
  • the speed difference between the applicator roller and the transfer roller allows slippage to form a thin, smooth layer of ink on the applicator roller.
  • the application roller brings color to the form roller.
  • the applicator roller and the form roller are driven at one and the same surface speed as the printing plate which is in engagement with the form roller.
  • the form roller should have an elastically resilient surface.
  • the applicator roller is provided with a hard surface and driven at a higher speed than a transfer roller provided with an elastic coating, against which it slips running.
  • a transfer roller engaged with the forming roller accordingly carries a thinner film than a transfer roller which engages with an applicator roller which in turn is engaged with a forming roller when the forming roller carries an equally thick film. Due to slippage between the transfer roller and the application roller - rather than between the transfer roller and a form roller - the lubrication is sufficient to reduce the drive power required for metering the ink.
  • the applicator roll and transfer roll are preferably smaller in diameter than the forming roll to minimize the shear portion of the indentation at the transfer nip. Since the hard surface on the applicator roller is driven faster than the adjacent elastic surface of the transfer roller, the elastic surface which moves into the transfer nip is kept under tension to prevent excessive deformation of the elastic coating. A change in the deformation of the elastic surface in the transfer gap results in a change in the strip width and thus in the shear section at the transfer gap.
  • the application roller is an intermediate roller which is in rolling engagement with the forming roller.
  • the transfer roller is driven by a variable-speed drive with a lower surface speed than the application roller.
  • the applicator roller which is in mutual pressurized engagement with the faster driven form roller and the slower driven transfer roller, is driven at a medium speed so that most or all of the slippage occurs between the applicator roller and the transfer roller.
  • the surface peripheral speed of the application roller changes with the pressure changes between the application roller and the transfer roller, with changes in the differential speed of the form roller and the transfer roller and the thickness of the ink film on the application roller and the transfer roller.
  • the present invention has for its object to provide an inking unit with which the ink film thickness by varying the surface speed a form roll is to be controlled relative to the surface speed of an adjacent roll.
  • the inking unit should be equipped with rollers which have a relatively small diameter in order to create a considerable indentation at the transfer nip with a corresponding pressure, while the strip width and thus the shear section between the transfer roller and the application roller are to be minimized.
  • the drive power required to generate a slip of a roller against another roller at an ink transfer nip is to be minimized by maintaining an ink film thickness adjacent to the transfer nip and thus by ensuring appropriate lubrication.
  • a hard surface roller is also said to be in opposing pressure engagement with an elastic surface roller to meter ink, the elastic surface rotating more slowly than the hard surface to minimize the deformation of the elastic surface at the nip.
  • an intermediate roller with a hard surface is provided between a pair of elastic rollers, the elastic rollers having different speeds; to control the thickness of the ink film applied to one of the elastic rollers.
  • reference numeral 1 generally designates an ink application device, also referred to below briefly as the inking unit, for applying ink and dampening fluid to a lithographic printing plate of a printing press.
  • a water application device also referred to briefly below as dampening unit 200, is a dampening unit of the type as shown and described in US Pat. No. 3,937,141, so that the disclosure of this publication is hereby for the sake of simplicity the subject of the present patent application is made.
  • the inking unit 1 has side frames 2 and 4 which are arranged at a mutual distance from one another and which are connected to one another by connection carriers (not shown) and have a strong, solid construction for supporting a forming roller 90, an inking roller 10, and an ink transfer roller 12 and form an ink metering roller 14.
  • the side frames can be the side frames of a printing press or the side frames of an inking unit which are to be connected to the side frames of a printing press.
  • Chin levers 16 and 18 are pivotally attached to side frames 2 and 4 by means of stub shafts 20 and 22, respectively.
  • Tilt cylinders 24 and 26 are articulated between the side frames 2 and 4 and the rocker arms 16 and 18, by means of which the rocker arms 16, 18 can be pivoted around the stub shafts 20, 22 in order to bring the transfer roller 12 into position, as will be seen further below is explained in detail, and for ink over the form roller 10 onto the form roller 90 of a lithographic printing machine seem to transmit.
  • An inclined arm 28 is provided to pivot one end of the metering roller 14 about the axis of the ink transfer roller 12. As shown schematically in FIG. 2, the tilt arm 28 is rotatably mounted or supported on a stub shaft 30 which extends adjacent to one end of the transfer roller 12 between the rocker arm 18 and the tilt arm 28.
  • the inclined arm 28 and the rocker arm 16 each have grooves 28a and 16a, respectively, which are formed in the inner sides, in which blocks 36 are slidably arranged, which carry self-aligning bearings 38.
  • blocks 35 with screws 37 are fixedly arranged in order to provide a suitable support for the shaft sections 31 and 32 of the ink transfer roller.
  • Suitable means such as elastic springs 40 between the blocks 35 and 36 push the blocks 36 in the longitudinal direction of the tilt arm 28 and the rocker arm 16 away from the longitudinal axis of the transfer roller 12.
  • a pressure adjusting screw 42 presses the block 36 in the longitudinal direction of the inclined arm 28 and the rocker arm 16 against the restoring force of the springs 40.
  • Stub shafts 44 and 46 which extend outward from the opposing ones of the metering roller 14, are supported in the self-aligning bearings 38, so that it is ensured that the metering roller 14 is in mutual rotary pressure engagement with the transfer roller 12.
  • the shaft sections 31 and 32 which are also referred to as stub shafts, extend from the opposite ends of the transfer roller 12 outside and are stored in bearings 39, which in turn are arranged in blocks 35.
  • a suitable means is provided with which the desired angular relative position between the rocker arm 18 and the inclined arm 28 can be set and maintained.
  • an adjusting screw 50 is rotated into the inclined arm 28 and extends through threaded bores which are provided in swivel blocks 52a and 52b.
  • the blocks 52a and 52b are articulated to a projection 54 on the inclined arm 28 and a projection 56 on the rocker arm 18, respectively.
  • the clearance between the projections 54 and 56 can be adjusted by the adjusting screw 50, in order in this way to be able to move the inclined arm 28 relative to the rocker arm 18 around the shaft 30.
  • the side frames 2 and 4 have suitable adjustable stops 5 with set screws 5a which extend through them to engage the rocker arms 16 and 18 when the piston rods of the rocker cylinders 24 and 26 are extended to a desired relative pressure between the To provide transfer roller 12 and the ink-coated applicator roller 10, the latter being provided to apply ink to a lithographic printing plate 112 via a form roller 90 to transfer a plate cylinder P, as will be explained in more detail below.
  • Block-like stops 6 with adjusting screws 6a provide an "out-of-pressure" limitation when the piston rods of the tilt cylinders 24 and 36 are retracted in order to move the transfer roller 12 away from the surface of the application roller 10.
  • the stub shaft 31 extending outward from the end of the transfer roller 12 has a gear 60 which or the like by means of a feather key. 61 is firmly wedged onto it, and which meshes with a gear 62 on the shaft 44.
  • the gear 62 meshes with a gear 71 on a shaft 58 which rotatably extends through an opening of the side frame 2.
  • the shaft 58 is connected to the shaft of a reversible, variable-speed drive 69, such as an electric geared motor. This could be seen through another drive, such as a drive with gear, sprockets, belts or the like. replaced and driven by the printing press drive, and then preferably with a variable-speed gear or the like ..
  • the line 80 by means of which the motor 69 is supplied with electrical energy, is connected via a variable resistor 84 to the terminals of the drive motor 69, so that the motor can run at different speeds and control the speed of rotation, so that the peripheral speed of the transfer roller is accordingly 12 and the metering roller 14 is independent of the printing press drive. If it seems appropriate, the motor 69 can be speed-controlled variable clutch are replaced, which connects the shaft 58 with the printing press drive, as this has already been described above.
  • a suitable means is provided in order to be able to supply an excess ink supply to the ink metering gap N between the adjacent surfaces of the transfer roller 12 and the metering roller 14.
  • a part or a section of the metering roller 14 is immersed in ink 14a, which is located in an ink pan 14b.
  • the color 14a is preferably a low-viscosity color, that is to say a type which is used for the coloring of raised image sections in letterpress printing, or a type which is used in direct or lithographic offset printing or in newspaper printing , or it is of a similar nature.
  • the transfer roller 12 preferably has a hollow, tubular bush (as it were as a core), to which the stub shafts 31 and 32 are molded.
  • An elastic cover 12c is attached to the outside of the socket.
  • the material of the transfer roller 12 is oleophilic; the surface can be smooth or textured.
  • the metering roller 14 is preferably hard and has an outer surface that is smooth or textured and ink-absorbing or oleophilic.
  • the surface of the ink metering roller 14 can accordingly consist, for example, of copper, steel or plastic.
  • the surface of the metering roller 14 can either be elastic or resilient.
  • the metering roller 14 is longer than the transfer roller 12 so that the ends of the metering roller 14 extend beyond the ends of the transfer roller 12.
  • the transfer roller 12 is preferably longer than the applicator roller 10, which in turn is longer than the form roller 90, in order to keep the accumulation of unnecessary ink adjacent to the ends of the form roller 90 as small as possible.
  • the form roller 90 is preferably cut to the same length as the pressure plate to prevent buildup of excess ink which could build up on the form roller if it were longer than the pressure plate.
  • the application roller 10 has a hard, smooth surface similar to that of the metering roller 14.
  • the transfer roller 12 is preferably in a state which is pressed in by pressure engagement with the application roller 10.
  • the applicator roller 10 preferably has a tubular metal core, at the ends of which stub rollers are arranged which extend outwards and are supported in bearings (not shown) which are carried by the side frames 2, 4 and which have means for pressing the transfer roller 10 in with pressing engagement to bring the form roller 90.
  • the forming roll 90 is preferably driven by a gear 90a which meshes with a gear 90b which is driven by the printing press. She owns one smooth, resilient outer cover.
  • An ink supply roller 94a which is preferably designed as an oscillating roller, removes ink from sections 128 ′′ of an ink film 128 on the surface of the forming roller 90 and adds color to the sections 128 1 indicated in terms of color, thus creating a uniform ink film on the surface of the forming roller 90 forms, which moves from gap 120 to gap A.
  • a second ink supply roller 94b which is designed similarly to the ink supply roller 94a, is arranged between the plate cylinder P and the dampening unit 200 in order to smooth the ink film when it returns from the form roller, as will be explained in detail below.
  • a conditioning roller 86 preferably in the form of an oscillating roller, is rotatably supported on a shaft 86a in blocks 86d and conditions and smoothes the surface of the ink film 100 in order to make the film more receptive to the absorption of wet liquid. Screws 86b and 86c press the blocks 86d, and thus the conditioning roller 86, into press-fit engagement with the forming roller 90.
  • the surface of the conditioning roller 86 is preferably made of a material similar to that of the forming roller 90 so that the surface has the same affinity for color as that Surface of the forming roll 90.
  • the ink film 100 comes out of the gap A between the form roller and the application roller 10, it is sized and calendered.
  • a sized color film is not particularly receptive to damp liquid, so that the surface tension of the color molecules can reject the thin layer of dampening liquid applied by the dampening unit 200.
  • the conditioning roller 86 receives a part of the ink film 100 and thus divides it into a film 100 'on the conditioning roller 86 and a film 100a remaining on the shaping roller, which has a matt finish with microscopic depressions. This matte finish on film 100a more readily accepts the thin layer of wet liquid due to the molecular attraction that is now greater than the surface tension of the wet liquid forming film 216.
  • the conditioning roller 86 and the ink supply roller 94a and 94b preferably have diameters such that when they rotate, the ink is properly applied to, removed from, or redistributed on the forming roller 90.
  • rollers 86, 94a and 94b designed as oscillating rollers are preferably provided with drives, not shown, by means of which the rollers can be moved back and forth in the longitudinal direction.
  • Suitable vibratory drives of this type are well known in printing technology, so that a detailed description does not appear to be necessary. Rotation is created by frictional contact with adjacent surfaces.
  • the dampening unit 200 is shown schematically in FIG. 1. It has a hydrophilic transfer roller 210 on a shaft 210a and an elastic metering roller 212 on a shaft 212a which is mounted on the inking unit 1 in a manner similar to that described in US Pat. No. 3,937,141.
  • the metering roller 212 doses moisture liquid 214a from a tub 214 onto the transfer roller 210 through a nip Na.
  • the water film set or controlled by the pressure between the rollers 210 and 212 forms a thin dampening liquid layer 204, which is metered through the dampening liquid transfer gap 106a onto the matt finish of the ink film 100a on the surface of the forming roller 90.
  • the metering roller 212 is driven by a variable-speed, reversible motor 269.
  • resistors 84 and 284 are connected to an electrical power source and a pair of coupled bipolar switches 81a and 81b to control the direction of rotation of motors 69 and 269.
  • the operation and operation of the device described above is as follows:
  • the pressure between the ends of the transfer roller 12 and the metering roller 14 is adjusted by turning the pressure adjustment screws 42.
  • the longitudinal pressure of the rollers 12 and 14 is adjusted by rotating the adjustment screw 50 and rotating the tilt arm 28 about the axis of the transfer roller 12 to a position in which there is a desired pressure distribution over the length of the rollers 12 and 14.
  • the adjusting screw 5a is brought into position to come into engagement with the rocker arms 16 and 18 and to set a desired pressure between the transfer roller 12 and the application roller 10.
  • the peripheral speeds of the rollers 12 and 14 are adjusted by actuating the resistor 84 as described above.
  • the dampening unit 200 is set in a similar manner to the inking unit 1.
  • FIG. 1 shows a schematic representation of the metering roller 14, the transfer roller 12, the application roller 10 and the shaping roller 19.
  • the color and water films are exaggerated for clarity.
  • the metering roller 14 if provided to transfer ink to a printing plate 112, is preferably a roller with a hard, smooth surface 14c, the underside of which is present in the ink tray 14b Color 14a is immersed.
  • the metering roller 14 is rotatably journalled in pushing pressure engagement with the transfer roller 12, the pressure between adjacent roller surfaces being adjusted by the adjusting screws 42 as described above, so that the surface of the transfer roller 12 at the ink metering gap N is through the surface of the roller 14 is really indented.
  • the applicator roller 12 Since the applicator roller 12 has a smooth ole q phile. Has a surface, part of the film 103 adheres to the surface of the roller 12 and forms a film 104. The remaining part 105 on the surface 14c is returned to the ink tray 14d. The ink film 104 is then distributed by the rotating squeezing action between the rollers 12 and 14 on the tangent line at the ink metering gap N. At the gap T it can be seen that the application roller 10 is pressed into the resilient surface of the transfer roller 12, and that the ink film 104 on the transfer roller 12 comes into contact with the ink film 107 on the application roller 10. The outside of the ink film 104 and the outside of the ink film 107 on the applicator roller 10 are compressed and cause a hydraulic connection between the rollers 10 and 12 when they rotate closely adjacent to each other, with no physical contact between the roller surfaces.
  • the relatively thick ink film 104 allows the rollers 10 and 12 to rotate at different speeds, as will be explained below.
  • the applicator roller 10 is driven by the forming roller 90 which rotates at the same peripheral speed as the pressure plate 112 via the gear 90a and rotates at a greater peripheral speed than the roller 12.
  • the peripheral speed difference between the transfer roller 12 and the application roller 10 The amount of ink transferred to the form roller 10 and applied to the form roller 90 can be regulated.
  • the ink film presented at the ink transfer nip 10 grows faster, so that more ink transfers to the surface of the application roller 10, the form roller 90 and the lithographic printing plate 112 and that the reverse applies if the peripheral speed of the roller 10 is reduced.
  • the ink film between the adjacent surface portions of the rollers 10 and 12 allows the rollers to be rotated relative to one another at different circumferential speeds, since the ink film 104 provides lubrication without slippage between the respectively adjacent surface portions of the rollers 10 and 12 frictional damage or even destruction. Because of the slippage between rollers 10 and 12 the ink film is metered, that is, metered and distributed, by dividing the ink between the adjacent surface portions of the rollers 10 and 12 to thereby form the ink film 106a. The thickness of the ink film 106a is controlled by the pressure between the metering roller 14 and the transfer roller 12 and the speed of the transfer roller 12.
  • ink film 216 on the form roller is likely to be about two units thick, half being transferred to printing plate 112 and the other half being film 128 ' remains on the forming roller 90. If film 100 is equal to film 216, film 106a would be three units thick because film 100 and film 107 are approximately the same thickness because film 128 'is combined with film 106a at gap A. Assuming that there is no slip, film 104 would be four units thick and film 106b three units thick.
  • the transfer roller 12 is preferably driven at a peripheral speed that is, for example, a few hundred feet / min slower than the peripheral speed of the applicator roller 10 and the forming roller 90.
  • form roller 90 and platen 10 typically have peripheral speeds of 1200 feet / min.
  • the transfer roller 10 would preferably rotate at a peripheral speed that is less than 240 feet / min.
  • the ink films 106a and 130 are combined or combined in the ink application gap A and also split when the rollers 10 and 90 are rotated away from the ink application gap A.
  • the fresh ink film 100 adheres to the surface of the forming roller 90.
  • Ink that has been rejected by the forming roller 90 forms a returned ink film 107, which may be slightly uneven, and which adheres to the surface of the application roller 10 and is returned to the nip T. to be metered again.
  • the conditioning roller 86 splits the film 100 by picking up a film 100 'and forming a matte finish on the film 100a. Any unevenness in the film 100 is compensated, so that a film 100a of very uniform thickness is formed.
  • the limit voltage between the outside of the less viscous wet film 204 due to molecular attraction between the surface of the viscous paint film 100a causes a portion 216 of the smooth and regular wet film 204 to be added to the surface of the paint film 100a, which in turn is transferred to the plate at the line of contact between the plate 112 and the forming roller 90 at the ink gap 120.
  • the lithographic printing plate 112 has hydrophilic ones or water-friendly non-image sections and oleophilic or color-sensitive image sections 122 which are formed on the surface. If the printing plate 112 is provided with raised image areas, the dampening unit 200 would not be needed to prevent transfer of color to non-image sections.
  • the ink film 100 or 216 is split at the gap 120 between the forming roller 90 and the printing plate 112 and forms thin films 125 of ink and water over the oleophilic sections 122 on the printing plate.
  • dampening fluid When dampening fluid is applied, the dampening fluid layer 216 is carried on and in the ink film 100 and also spread to form a thin film 216 of dampening fluid over the hydrophilic portions 121 of the printing plate. An insignificant amount of dampening fluid remains on the surface of the forming roll 90 which moves away from the nip 120.
  • dampening fluid is transferred with the ink film 128 to the ink film 130a on the ink supply roller 94a, where the dampening fluid can be excreted and / or evaporated to such an extent that it has no effect on the ink system.
  • the color of the film 128 remaining on the forming roller 90 is combined with the ink film 130a on the ink supply roller 94 and divided and collected on the roller 94a.
  • the ink on roller 94a is fed to the exploited portions 128 'of film 128, thus reducing the known effect of so-called ghosting with respect to film 128 by forming a more uniform film 130 before re-entry into the film Gap A occurs.
  • the dampening liquid layer 216 is applied in essentially the same way.
  • An excess of wet liquid 201 is supplied to a wet liquid bead 202 to form the wet liquid film 204, which is applied in the gap 106a to the ink film 100a on the forming roller 90.
  • a wet liquid film 217 is returned to the wet liquid bead 202 in order to be remeasured or dosed at the gap Na.
  • the device for applying color according to the invention in a printing system offers the possibility of controlling the metering at the ink metering gap N in order to create an ink film 104 of precisely controlled thickness by the pressure between the transfer roller 12 and the Metering roller 14 is adjusted, and by further controlling the peripheral speeds of the rollers relative to each other. It controls the extent to which metered ink film 104 is presented to film 107 on applicator roller 10 at ink metering nip T, and also the hydraulic force to provide the desired one Get color thickness.
  • a printing station U normally has a pair of printing units C, each of which has an inking unit 1 and a dampening unit 200.
  • the right printing unit C When it is necessary to print two colors on one side of the web W, the right printing unit C must be reversed as shown in Fig. 5 so that the web W can be fed through the printing station for printing on a single page.
  • the dampening fluid When reversing the direction of rotation of the forming roller 90 the dampening fluid is applied to the thin "ghost ink film" which leaves the printing plate 112 after the ink supply roller 94b has smoothed the ink film to a certain extent.
  • a fresh supply of ink is supplied to the dampening fluid and ink on the form roller 90 as the form roller 90 moves through the nip A.
  • the unit C can accordingly be reversed in a simple manner by reversing the drive of the unit and the motors 69 and 269. It can be seen that the ink and dampening fluid films shown in Fig. 1 represent a standard printing unit that moves in the normal standard direction / and that the films would change locally from those shown if the printing unit were reversed to first apply dampening fluid and then Apply color to the dampening fluid.
  • the method for metering ink comprises, in general terms, the steps of positively positioning a metering roller 14 and a transfer roller 12 in opposing pressure engagement to form an ink metering gap N, and the ink metering roller 14 and to rotate the ink transfer roller 12 so that adjacent surface portions move in the same direction to form an ink film 104 on the transfer roller 14.
  • the applicator roller 10 is positioned and rotated in impressively mutual pressure engagement with the resilient mold roller 90 and the ink transfer roller 14 so that their surface speed is substantially equal to the surface speed of the mold roller 90 and the platen 112.
  • the transfer roller is rotated so that its surface speed is substantially less than the surface speed of the inking roller 10, for example less than 20%, to ensure that no ink accumulates at the flooded ink transfer nip T.
  • the elastic transfer roller 12 is rotated at a surface speed less than the surface speed of the hard applicator roller to keep the portion of the resilient surface of the transfer roller 12 which moves to the ink transfer nip T under tension.
  • the radius of the portion of the resilient surface of the transfer roller 12 entering the ink transfer nip T is believed to be less than the radius of the portion exiting the ink transfer nip T. Accordingly, no power is consumed to unnecessarily deform the elastic roll surface.
  • the transfer roller 12 and the application roller 10 have a smaller radius than the forming roller, so that the width of the transfer nip T is smaller than the width of the application gap A when the surface of the transfer roller is equidistant in the forming roller 90 at the application gap A and in the transfer roller 12 is pressed in at the transmission gap T.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)
  • Coating Apparatus (AREA)
EP80106790A 1979-11-05 1980-11-05 Dispositif encreur pour une machine à imprimer Expired EP0028421B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1979/000948 WO1981001267A1 (fr) 1979-11-05 1979-11-05 Dispositif encreur pour des rotatives
WOPCT/US79/00948 1979-11-05

Publications (2)

Publication Number Publication Date
EP0028421A1 true EP0028421A1 (fr) 1981-05-13
EP0028421B1 EP0028421B1 (fr) 1985-02-20

Family

ID=22147773

Family Applications (2)

Application Number Title Priority Date Filing Date
EP80900819A Withdrawn EP0039675A1 (fr) 1979-11-05 1979-11-05 Dispositif encreur pour des rotatives
EP80106790A Expired EP0028421B1 (fr) 1979-11-05 1980-11-05 Dispositif encreur pour une machine à imprimer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP80900819A Withdrawn EP0039675A1 (fr) 1979-11-05 1979-11-05 Dispositif encreur pour des rotatives

Country Status (9)

Country Link
EP (2) EP0039675A1 (fr)
JP (1) JPS56501716A (fr)
CA (1) CA1165176A (fr)
DD (1) DD154086A5 (fr)
DE (1) DE3070223D1 (fr)
FR (1) FR2468464A1 (fr)
IT (1) IT1174316B (fr)
SE (1) SE8007730L (fr)
WO (1) WO1981001267A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065138A1 (fr) * 1981-05-19 1982-11-24 Albert-Frankenthal AG Dispositif d'encrage court pour une machine à imprimer
WO2001087036A2 (fr) * 2000-05-17 2001-11-22 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage d'une machine d'impression par rotative
WO2003031184A1 (fr) 2001-10-01 2003-04-17 Koenig & Bauer Aktiengesellschaft Systeme d'encrage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139443A (en) * 1989-03-23 1992-08-18 Littelfuse, Inc. Housing assembly for plug-in electrical element having blade-type terminals
CN112009097B (zh) * 2020-09-11 2022-02-25 福建省满利红包装彩印有限公司 一种高阻隔印刷包装袋加工设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224331A (en) * 1939-08-08 1940-12-10 American Bank Note Co Inking mechanism for rotary steel plate printing machine
DE1176674B (de) * 1957-10-10 1964-08-27 Miehle Goss Dexter Inc Farbwerk fuer Rotationsdruckmaschinen
DE2052806A1 (de) * 1970-10-28 1972-05-04 Koenig & Bauer Schnellpressfab Farbwerk fur Druckmaschinen
US3991674A (en) * 1971-03-19 1976-11-16 Petri Nello J Dampening apparatus for a lithograph offset printing plate
DE2916048A1 (de) * 1978-04-18 1979-10-31 Dahlgren Harold P Druckmaschine sowie farbwerk fuer eine druckmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647525A (en) * 1959-10-05 1972-03-07 Dahlgren Mfg Co Method and means for applying liquid to a moving web
US3168037A (en) * 1960-05-02 1965-02-02 Harold P Dahlgren Means for dampening lithographic offset printing plates
US3986452A (en) * 1960-05-02 1976-10-19 Dahlgren Manufacturing Company, Inc. Liquid applicator for lithographic systems
US3552311A (en) * 1968-07-12 1971-01-05 Nello J Petri Dampening system for a lithographic press
US3673959A (en) * 1970-04-22 1972-07-04 North American Rockwell Dampening system for lithographic printing press
US4127067A (en) * 1974-02-15 1978-11-28 Dahlgren Harold P Method for inking printing plates
US3937141A (en) * 1974-06-17 1976-02-10 Dahlgren Harold P Dampener for lithographic printing plates

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224331A (en) * 1939-08-08 1940-12-10 American Bank Note Co Inking mechanism for rotary steel plate printing machine
DE1176674B (de) * 1957-10-10 1964-08-27 Miehle Goss Dexter Inc Farbwerk fuer Rotationsdruckmaschinen
DE2052806A1 (de) * 1970-10-28 1972-05-04 Koenig & Bauer Schnellpressfab Farbwerk fur Druckmaschinen
US3991674A (en) * 1971-03-19 1976-11-16 Petri Nello J Dampening apparatus for a lithograph offset printing plate
DE2916048A1 (de) * 1978-04-18 1979-10-31 Dahlgren Harold P Druckmaschine sowie farbwerk fuer eine druckmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065138A1 (fr) * 1981-05-19 1982-11-24 Albert-Frankenthal AG Dispositif d'encrage court pour une machine à imprimer
WO2001087036A2 (fr) * 2000-05-17 2001-11-22 Koenig & Bauer Aktiengesellschaft Dispositif d'encrage d'une machine d'impression par rotative
WO2001087036A3 (fr) * 2000-05-17 2002-06-20 Koenig & Bauer Ag Dispositif d'encrage d'une machine d'impression par rotative
US6886461B2 (en) 2000-05-17 2005-05-03 Koenig & Bauer Aktiengesellschaft Short inking system for a rotary printing machine
WO2003031184A1 (fr) 2001-10-01 2003-04-17 Koenig & Bauer Aktiengesellschaft Systeme d'encrage
DE10148501A1 (de) * 2001-10-01 2003-04-30 Koenig & Bauer Ag Farbwerk

Also Published As

Publication number Publication date
JPS56501716A (fr) 1981-11-26
DE3070223D1 (en) 1985-03-28
SE8007730L (sv) 1981-05-06
FR2468464A1 (fr) 1981-05-08
CA1165176A (fr) 1984-04-10
EP0028421B1 (fr) 1985-02-20
EP0039675A1 (fr) 1981-11-18
IT8050078A0 (it) 1980-11-04
DD154086A5 (de) 1982-02-24
WO1981001267A1 (fr) 1981-05-14
FR2468464B1 (fr) 1985-03-29
IT1174316B (it) 1987-07-01

Similar Documents

Publication Publication Date Title
EP0064270B1 (fr) Dispositif d'encrage
EP0956973B1 (fr) Blanchet pour l'impression avec transfert complet de l'encre
EP0010237A1 (fr) Dispositif combiné de mouillage et d'encrage pour une machine à imprimer offset et procédé pour encrer et mouiller un cliché d'impression offset
DE2525688A1 (de) Verfahren und vorrichtung zur zufuehrung von anfeuchtfluessigkeit zu einer lithographischen druckeinrichtung
EP0028420A1 (fr) Procédé et dispositif pour doser de l'encre et réservoir d'encre interchangeable
DD143059A5 (de) Druckvorrichtung sowie farbwerk fuer eine druckvorrichtung
DE1536450A1 (de) Vorrichtung zur Aufbringung eines UEberzugs auf eine Platte
EP1627738B1 (fr) Unité d'impression et unité d'encrage avec cylindres d'encrage et cylindres oscillants mus indépendamment
EP1036657B1 (fr) Dispositif de mouillage pour une machine à imprimer
DE2932105A1 (de) Farbwerk fuer eine offsetrotationsdruckmaschine
EP1569797B1 (fr) Procedes pour assurer la commande des rouleaux prelevant un agent de mouillage
DE1176674B (de) Farbwerk fuer Rotationsdruckmaschinen
DE69305169T2 (de) Vorrichtung zur papierfärbung
DE8413874U1 (de) Vorrichtung zum Befeuchten an lithographischen Druckpressen
DE1761404A1 (de) Benetzungsvorrichtung,insbesondere fuer Offset-Rotationsdruckmaschinen
EP0116176B1 (fr) Dispositif d'encrage
DE2320430A1 (de) Einrichtung und verfahren zum zubringen von fluessigkeit zu einer druckanordnung
EP0518892B1 (fr) Mecanisme d'encrage court pour rotative
DD143060A5 (de) Druckmaschine sowie farbwerk fuer eine druckmaschine
US4237785A (en) Inker for applying newsprint type ink
EP0028421B1 (fr) Dispositif encreur pour une machine à imprimer
DE60020252T2 (de) Verfahren zum betreiben einer druckeinheit und druckeinheit für eine offset-druckmaschine
DE4447178A1 (de) Feuchtwerk für eine Druckmaschine
DE19903167A1 (de) Einrichtung und Verfahren für das Dosieren von Farbe in Offsetdruckmaschinen
DE4314426A1 (de) Verfahren zur Farbmengeneinstellung bei Heberfarbwerken von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen, sowie entsprechend ausgebildetes Heberfarbwerk

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19810622

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB

REF Corresponds to:

Ref document number: 3070223

Country of ref document: DE

Date of ref document: 19850328

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881105

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890801