WO2007004053A2 - Machine pour impression lithographique de fer blanc - Google Patents

Machine pour impression lithographique de fer blanc Download PDF

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Publication number
WO2007004053A2
WO2007004053A2 PCT/IB2006/001955 IB2006001955W WO2007004053A2 WO 2007004053 A2 WO2007004053 A2 WO 2007004053A2 IB 2006001955 W IB2006001955 W IB 2006001955W WO 2007004053 A2 WO2007004053 A2 WO 2007004053A2
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
printing
machine
inking
tinplate
Prior art date
Application number
PCT/IB2006/001955
Other languages
English (en)
Spanish (es)
Other versions
WO2007004053A3 (fr
Inventor
Santiago Pedro Badran
Original Assignee
Pakgoiz, Mario, Javier
Molina Castro, Hernando, Rafael
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 Pakgoiz, Mario, Javier, Molina Castro, Hernando, Rafael filed Critical Pakgoiz, Mario, Javier
Publication of WO2007004053A2 publication Critical patent/WO2007004053A2/fr
Publication of WO2007004053A3 publication Critical patent/WO2007004053A3/fr

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Classifications

    • 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
    • B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/22—Inking arrangements or devices for inking from interior of cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/001—Devices for cleaning parts removed from the printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/16—Rotary lithographic machines for printing on non-deformable material, e.g. sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers
    • B41F7/265—Damping devices using transfer rollers for damping from the inside of the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/28—Printing on other surfaces than ordinary paper on metals

Definitions

  • the present invention relates to a machine for lithographic printing of tin by the offset system.
  • This type of printers is used to decorate tin containers such as aerosols, canned cans, paint containers, etc.
  • tin containers such as aerosols, canned cans, paint containers, etc.
  • a lithographic printer individual tin plates enter at one end and the printed tin with different colors comes out from the other, with which the containers are then assembled.
  • All tin offset printers print the same with machines that print color by color in a linear fashion, that is, the tin travels a linear and horizontal path as it receives the different colors.
  • machines that print color by color in a linear fashion, that is, the tin travels a linear and horizontal path as it receives the different colors.
  • these machines those marketed by Crabtree firms can be cited; Bauer-Kunzi; Mailaender; Hoe and Planet.
  • the inking-humidifying device is fixed to the machine, without the possibility of being removed.
  • a manual cleaning process is carried out which consists in operating the printer (without printing, simply rotating all its cylinders) by pouring solvent with a container on the inking-humidifying cylinders.
  • This rudimentary cleaning process is done several times a day, as many times as inks have to be changed to make different prints.
  • the problem of this device is that the cleaning is carried out inside the machine, so that the mixture of ink and solvent that arises from the washing process, drains through all the other devices of the printer, splashing elements such as: gears; bearings, cams, etc.
  • the latter damages the useful life of the machine and all its mechanical components, so it would be desirable for the state of the art to provide a lithographic machine for printing tinplate in which the inking-humidifying device could be removed from it and carried to a "washing station" outside the printer, so as not to compromise its mechanical parts at all.
  • Another problem that arises from the state of the closest technique is that referred to the different color frequencies for different prints. In an offset printing process, the printing sequence of the different colors may change depending on the product to be printed.
  • the printing sequence can be: RED-YELLOW-BLUE, while in another product that you want to print after the previous one (for example, food containers) it must be done with a different sequence and perhaps with some different color, such as: YELLOW-BLUE-BLACK.
  • the inking and humidifying device of conventional offset printers is bulky and complex, since it is composed of a device that provides ink (inker) and another device that provides water (humidifier). Its operation is based on taking ink from one pan and water from another Hit and transfer it from cylinder to cylinder to achieve a thin film, which forces you to have a device of no less than 20 or 2 cooperating rollers.
  • This design of separate devices, on the one hand the inker and on the other the humidifier does not allow any other arrangement that is not linear, since its large size is prevented, since it would take the printer impossible to operate because it is not ergonomic for the operator
  • a lithographic machine for printing tinplate in up to six colors is proposed by means of the present, with up to six printing stations arranged around a central cylinder equipped with a series of electromagnets that serve to attract the tin , each of said stations comprising a pair of cylinders mobilized by an eccentric device and a unified inking-humidifying device comprising a porous inkjet cylinder and a porous water injection cylinder.
  • the whole set is completed with a feeder, a tin plate unloader, an ultraviolet light ink drying device and a removable unit exchange wheel, as well as an external washing unit for the inking-humidifying device that rotates the cylinders of it while it is being washed.
  • the patent EP 092279 B1 is also known, which reveals a cylinder with a porous membrane where the ink projects outwards, using a flexible porous membrane.
  • the speed of rotation of the cylinders is so high that a flexible membrane would not withstand mechanical stresses. That is why in the porous cylinder proposed here, the element that has the pores is made of sintered metal tubes or porous hard plastic.
  • the proposed porous cylinder is designed not only to inject ink, but also water, since the offset system requires the use of both water and ink.
  • the publication AU-A-89747/82 is also known, which discloses a machine that prints several colors in a single pass, but the layout of its printing stations are arranged in a linear and horizontal manner, so that it does not resemble Ia printer proposed here where the printing stations are distributed circumferentially around a single central cylinder.
  • This printing machine does not have an ultraviolet drying system or an "inking device" removable and interchangeable humidifier. The same can be said of the English publication GB 2017003 A.
  • printing machines are known that use electromagnetic cylinders such as publication JP4072260, which comprises a cylinder that manages to attract and fix a tin on its periphery, which it does by means of the magnetic attraction generated by magnets fixed inside.
  • This device differs from the proposed electromagnetic cylinder that is selective, while in that the magnets have no possibility to stop attracting the tinplate selectively, since they are permanent magnets.
  • Figure 1 is a side view of the proposed printing machine without its side cover, so as to reveal its internal components.
  • Figure 2 is a more detailed perspective of the printer, this time without the outer cover of the central cylinder, which allows to see its interior.
  • Figure 3 schematizes the arrangement of the lithographic machines of the prior art, which are resolved in line, one station after the other.
  • Figure 4 is a side view and a cross-section of the electromagnetic central cylinder, around which the inking stations are arranged.
  • Figure 5 shows a perspective view showing the inside of the central cylinder of Figure 4.
  • Figure 6 shows the arrangement of the central cylinder with its electromagnets and the six printing stations grouped around it.
  • Figures 7 to 12 show the printing sequence of the tin from the time it enters the printing circuit until it exits the same through the upper part of the central cylinder, enabling a new tin to enter said circuit.
  • Figure 13 presents a perspective of an isolated printing station, where the elements that constitute it are shown: printing cylinder, blanket or rubber cylinder and inking-humidifying device.
  • Figure 14 is a perspective of the printing cylinder of the printing station of Figure 13.
  • Figure 15 is a perspective of the blanket or rubber cylinder of the printing station of Figure 13.
  • Figure 16 shows an exploded perspective detailing the device of eccentrics that have both the printing cylinder and the blanket or rubber cylinder, which allows them to move in a particular way.
  • Figure 18 shows a diagram of the arrangement of conventional printers of the prior art, which have two servo actuator devices, one for the printing cylinder and one for the blanket cylinder.
  • Figure 19 reveals the proposed arrangement with a single pneumatic piston, thanks to a new arrangement of the three cylinders involved.
  • Figure 20 shows a perspective of the proposed inking-humidifier device with only 9 cylinders.
  • Figure 21 is another perspective, but of the conventional inking and humidifying device possessed by offset printers of the known prior art, with an amount of 20 to 2 cylinders.
  • Figure 22 is a longitudinal section through the porous inkjet cylinder.
  • Figure 23 is an exploded perspective of the porous inkjet cylinder.
  • Figure 24 shows the complete arrangement of the proposed lithographic machine, where the drying lamps located inside container modules, the tin plate feeder and the tin plate unloader are shown.
  • Figure 25 represents a perspective of the lithographic machine with the exchange wheel in position to be coupled.
  • Figure 26 shows the exchange wheel already attached to the printer.
  • Figures 27 to 31 are a series of perspectives that show the sequence of the exchange process of the removable units using the exchange wheel.
  • Figure 32 is a perspective showing the location of the washing station in the whole assembly.
  • Figures 33 to 35 are a series of perspectives that show the sequence of how a removable inking-humidifying device is transferred to the washing station using the exchange wheel.
  • FIG. 36 shows in detail the washing unit and its components.
  • FIG 37 is a general perspective of the whole assembly of the invention. Detailed description of the invention
  • the machine described is a lithographic printer for printing tin. Its operation respects the basic guidelines of the offset printing method.
  • the claimed printer acts under the offset system, which uses a sheet of prestressed aluminum or steel on which a "photogravure" of the image to be printed is made. This sheet is wound on the printing cylinder (1).
  • a blanket or rubber cylinder (2) is in contact with the printing cylinder (1) and with the central cylinder (3).
  • the central cylinder (3) has a series of electromagnets (15) inside which serve to attract the tin.
  • the inking-humidifying device (4) is responsible for depositing a thin layer of water and another thin layer of ink on the prestressed plate (100) that hugs the printing cylinder (1).
  • the blanket cylinder (2) has the ability to move away from the printing cylinder (1) and the central cylinder (3) thanks to a device that has an eccentric part (5). These eccentric parts are holding the bearings (108) of the blanket cylinder (2).
  • the eccentrics (5) are operated with a pneumatic cylinder (7).
  • the incoming tin plate (9) adheres to the central cylinder (3) thanks to the magnetic effect generated by the electromagnets (15) that are inside said cylinder.
  • the central cylinder (3) when turning with the tin (9) adhered to its periphery, forces it through the six printing stations (A, B, C, D, E and F). Once the six colors are printed, the tin must leave the central cylinder (3) for which the electromagnets are gradually deactivated as the tin advances. Finally, the tin leaves the machine (10).
  • lamps in the form of tubes (8) that emit ultraviolet light are used. This type of light emits such radiation that reacts the photoinitiators of the printed ink and thus manages to dry it instantly.
  • Fig. 1 there are six sets called printing stations (A; B; C; D; E and F) and each of these stations is composed of: a printing cylinder (1), a cylinder of blanket or rubber (2), an inking-humidifying device (4) and an eccentric device (5) for the movement of the blanket cylinder (2).
  • FIG. 2 A more complete image can be seen in Fig. 2, where each of the main parts can be seen and how they interrelate.
  • These printing stations are identical to each other and each of them is enabled to print a single color, so that with six of these stations, the machine can print six colors in a single pass of the tin.
  • These known printers comprise a printing cylinder (11), a blanket cylinder (12) and a lower cylinder (13).
  • Said electromagnetic central cylinder (3) comprises a hollow metal cylinder (14) (see Fig. 4), which has a certain number of electromagnets (15) arranged on the inner periphery. These electromagnets (15) generate a magnetic force of attraction that will serve to fix the tin plates to be printed.
  • this cylinder has two collinear shaft tips (16) with two bearings (17) at its ends, which gives the cylinder the ability to rotate.
  • a toothed crown On one side of the cylinder is connected by means of screws, a toothed crown (18), which may be straight, inclined, helical or bihelicoidal teeth, through which a gear force is transmitted that manages to exert the necessary torque to generate the rotating movement of the entire cylinder.
  • the electromagnets (15) are connected in groups arranged linearly forming rows. In Fig. 5, arrows (101) showing the direction of said rows can be seen.
  • the tin to be printed adheres to the periphery of the cylinder thanks to the magnetic force of the electromagnets (see Fig. 6). There you can see the bearings (19) of the rollers; the electromagnets (15); the central drum (3) and the incoming tin plate (22).
  • the six print stations are identified with the letters A; B; C; D; E and F.
  • This process of de-energizing each row is carried out gradually until all the tin leaves the cylinder.
  • the tin when leaving the cylinder falls on a conveyor belt (102) and is moved away from the machine to finally be stacked in the tin unloader (43).
  • the cylinder (3) throughout this process does not stop rotating at a continuous speed.
  • the electromagnets are re-energized sequentially in the same order as before they were de-energized. The latter is done so that the cylinder receives a new tinplate (21) to be printed.
  • the drum is magnetized so that the tin can adhere to it and thus can pass through the printing stations. After all the colors were printed on the tin, it must be removed, for which the electromagnets are demagnetized sequentially, so that the tin leaves the cylinder following its path by means of a conveyor belt (102) until its final destination in the unloading device (43), which is where the already printed sheets are stacked.
  • the magnetization sequence of the electromagnets is detailed in an orderly manner in Figures 7 to 12. Next, it will be described step by step, as is the process of activation and deactivation of the electromagnets during the printing process: 1 or Step (Detailed in FIG . 7).
  • the tin (22) approaches the machine to enter and be printed.
  • all the electromagnets (15) are demagnetized, that is to say de-energized of the electric current.
  • the tinplate (22) makes contact with the central cylinder (3) and adheres to it by the magnetic force exerted by the electromagnets that are energized (23).
  • the majority of the electromagnets (15) are demagnetized, while the electromagnets (23) are already connected and magnetized, attracting the tinplate (22).
  • the central cylinder (3) continues to rotate while the electromagnets are magnetized as the tin plate (22) enters. It will be seen that the magnetized electromagnets (23) are represented with striped rectangles, while those that are de-energized (15) are empty.
  • Step: (Detailed in FIG . 10).
  • the tin (22) fully adhered to the central cylinder (3), which is rotating and forcing the tin (22) through the 6 AF print stations.
  • each printing station has the ability to transfer a single color to the tin, so that if you wish to print four colors on a tin, four print stations will suffice, in the case of printing five five printing stations will be needed , etc.
  • Said A-F printing stations are distributed around the periphery of the central cylinder (3) and each printing station comprises two cylinders (1 and 2) that rotate together with the central cylinder (3) thanks to a simple transmission of gears.
  • a complete printing station is shown where the elements that constitute it are: a printing cylinder (1), a blanket or rubber cylinder (2), the inking-humidifying device (4) and the device for eccentric (5).
  • the printing cylinder (1) is a metal cylinder on whose periphery a prestressed plate (100) is held containing the engravings to be printed, such as drawings, letters or figures.
  • This prestressed plate (100) can be made of aluminum or steel and its drawings or figures are obtained by photo-etching, exposing the plate to non-ionizing radiation and then with developing processes similar to the development of photographs.
  • This type of plate is a commercial element and is commonly used in all types of offset printers.
  • This plate (100) has the particularity of fixing the ink only in the part where the engraving to be printed is located.
  • the ink is deposited by means of rubber rollers belonging to the inking-humidifying device (4), which is in contact with the printing cylinder (1), as can be seen in the detail of Figure 13.
  • This printing cylinder (1) also has two shaft ends (103) with their respective bearings, this gives it the ability to rotate.
  • the blanket or rubber cylinder (2) comprises a metal cylinder similar to the printing cylinder (1) at whose periphery a blanket or rubberized shell (106) is hugged. This cylinder (2) is in contact with the printing cylinder (1) and fulfills the function of receiving the image from it and transmitting it to the tin during its rotation.
  • gear (107) that can be made of straight, inclined, helical or bihelicoidal teeth, which receives the engagement force from the crown of the central cylinder (3). This rotating movement is also transmitted to the corresponding gear (104) of the printing cylinder (1) already described.
  • This gear (107) coincides with the outer diameter of the blanket cylinder (2) when the blanket (106) is in place.
  • this cylinder (2) also has two shaft ends (108) with their respective bearings, which gives it the ability to rotate.
  • Both the printing cylinder (1) and the blanket cylinder (2) comprise eccentrics (5) at their ends.
  • This eccentric device (5) comprises metal parts (109) that serve as housing for the bearings (108). Said housing is arranged eccentrically with respect to its outer circumferential part. The eccentricity of this piece, allows the cylinder that rests there, to have a relative movement with respect to the surrounding cylinders. This can be seen in Fig. 17, which shows (in dotted lines) that the blanket cylinder (2) has been separated from the printing cylinder (1) and the central cylinder (3). The separation distance, in both cases, is indicated by the letter (Z).
  • a mechanical servo actuator (7) which may be an electric actuator, a pneumatic or hydraulic piston, or a cam system.
  • Fig. 17 shows a servo actuator (7) consisting of a pneumatic piston.
  • This eccentric device (5) is usually used in all types of offset printers to achieve the separation of the cylinders when the machine stops printing. Although it is a conceptually known system, a novel configuration is introduced in this, because to achieve that desired separation of the cylinders (1) and (2), a single servo actuator device (7) is used, while in all printers Conventional devices have two servo actuators, one for the printing cylinder and one for the blanket cylinder.
  • each A-F printing station is the inking-humidifying device (4).
  • This device gathers in a single set two characteristic and inherent offset printing devices that are conventionally provided separately: the device that provides the ink (inker) and the device that provides the water (humidifier).
  • the proposed novel configuration replaces the two conventional systems of inking and humidifier that have all offset printers of the current state of the art.
  • Fig. 20 it is proposed to establish this comparison, facing both devices: the proposed single inking-humidifier device (4) and the conventional device of offset printers (34).
  • the prior art bases its operation on taking ink from one bat (35) and water from another bat (36) to transfer it from cylinder to cylinder until a thin film is achieved; while the printer proposed instead uses a hydraulic pump that injects the ink and water into two independent cylinders (110) of porous material (metal or plastic) that transfer the ink and water over the rest of the cylinders of rubber that are in contact with the prestressed plate (100) of the printing cylinder (1).
  • porous material metal or plastic
  • the proposed configuration allows obtaining this result thanks to the porous cylinders (110) that rotate in contact with the rubber cylinders.
  • This arrangement so small in size and complexity, has allowed six printing stations to be distributed around a single central cylinder (3).
  • the inking-humidifying devices of conventional printers cannot adapt to this arrangement of a single central cylinder, since their large size is prevented, since it would make the printer impossible to operate because it is not ergonomic for the operator. Therefore, this compact design of the inking-humidifying device (4) proposed here is what allowed the particular configuration of six AF printing stations arranged peripherally around a single central cylinder (3).
  • a manual cleaning process is carried out which consists in operating the printer (without printing, simply rotating all its cylinders) by pouring solvent with a container on the inking-humidifying cylinders. After a few minutes of continuously pouring solvent, the cylinders "wash" until there are no traces of ink. It is only there where another ink of different color can be incorporated than the one that has just been washed.
  • This rudimentary cleaning process is done several times a day, as many times as inks have to be changed to make different prints.
  • the problem of this device is that the cleaning is carried out inside the machine, so that the mixture of ink and solvent that arises from the washing process, drains through all the other devices of the machine, splashing elements such as: gears; bearings, cams, etc. The latter damages the useful life of the machine and all its mechanical components.
  • the inking-humidifying device (4) is removed from the machine and taken to a washing station (48), which comprises airtight equipment that keeps the entire device confined, so that all solvent or ink splashes fall on a tray, without affecting the printer at all because it is far from it. Also inside the washing station (48) The solvent is automatically injected under pressure without the manual intervention of man.
  • the printing sequence of the different colors may change at the user's request, depending on the product to be printed.
  • the printing sequence is:
  • the porous inkjet cylinder (110) is part of the inking-humidifying device and consists of several tubes of a porous material (37) (metallic or plastic) supported by a central steel tube (38) having clamping bolts ( 39) to keep the porous tubes positioned.
  • the pressure ink from a hydraulic pump enters through the hole (40).
  • the porous water injection cylinder (110) is identical to that of inkjet and is therefore mentioned with the same reference. The difference is that inside it water is injected instead of ink.
  • Fig. 22 and Fig. 23 are also valid for this case, because constructively, both cylinders are equal.
  • Both the ink and water are injected into the porous cylinders by means of hydraulic pumps or another similar element that fulfills the same function.
  • the effect achieved in these cylinders is that both the ink and the water injected, come out evenly and well distributed by the micropores of the porous tubes. This is fulfilled by the physical law that says that: "in a vessel that contains a fluid, the pressure is distributed uniformly at all points.”
  • the fastening bolts (39) that fulfill the functions of internal ribs or partitions that prevent the porous material covering the cylinder from undergoing deformation during use, since these cylinders (110) are rotating and permanently in contact with Some rubber cylinders.
  • ink or water are completely covered with ink or water, depending on the case and thus the desired effect is achieved, that is, two thin layers, one of ink and the other of water, necessary for a typical offset printing, both applied on the prestressed plate ( 100) of the printing cylinder (1).
  • Another of the innovations introduced in the present invention consists of the ultraviolet drying device (8), which manages to dry the ink instantaneously, comprising lamps in the form of tubes that emit ultraviolet radiation.
  • the need for drying is that the tin passes from one station to another with the freshly printed ink, the same having to dry before entering, otherwise the printing could be ruined.
  • the inking-humidifying devices (4) are removable and interchangeable units that facilitate color changes during the printing process.
  • This exchange is carried out by means of the exchange wheel (44) (See Fig. 25), which is located next to the printer.
  • said wheel 25 is shown to said wheel separated from the printer, but in reality the same is next to the rest of the machine (this is seen in the following figures).
  • This wheel (44) comprises a central axis on which it rotates freely, either manually or automatically by means of an electric motor or other device that gives it movement.
  • the wheel (44) has housings (41) that coincide with the housings that the printer has in which the six inking-humidifying devices (4) rest. Said devices leave the printer sliding horizontally (manually or automatically) and move on to be placed in the housings of the exchange wheel (44).
  • Figures 26; 27; 28; 29 and 30 are shown step by step, the exchange of two inking-humidifying devices. What is intended is to place the inking-humidifier device (4F) where the (4D) is located and vice versa. • 1 or Step (Fig . 26) Here example arises where, six devices inking-dampening are desired exchange only two of them, for example the device (4) located within the housing of the printing device (F) and the device (4) of the housing of the printing device (D).
  • washing station within which the device to be washed is located.
  • the washing station (48) consists of a metal capsule which inside comprises solvent injectors (52) connected to a hydraulic pump (50) that pumps said solvent from a tank.
  • the solvent is sprayed at high pressure on the inking-humidifying device, managing to release all the ink that has adhered.
  • a motorized device (51) that rotates the cylinders of the inking-humidifying device while it is being washed. After a few minutes, the effect produced by the solvent projected under pressure, makes the entire inking-humidifier device free of ink. Then, once the solvent flow has stopped, a stream of hot air begins to be injected into the equipment to dry the entire inking-humidifying device. Moments later, the device is already washed and dry, it is now when you can return to the printer for later use with another color of ink.
  • the process of movement and transfer of the inking-humidifying device from the printer to the washing station is also carried out by means of the exchange wheel (44).
  • the location of the washing station (48) is represented in Fig. 32.
  • Step (Fig . 33) arises example where the device entintador- humidifier (4F) must be transported to Ia washing station. For this, the inking-humidifying device (4F) slides to the corresponding housing of the exchange wheel (44).
  • This process can be carried out in the same way to wash each of the six inking-humidifying devices, always using the exchange wheel as a link between the printer and the washing station.
  • the inking-humidifying device can be observed in isolation within the washing station.
  • the injection unit (50) that supplies the washing solvent and the hot air for drying can be seen.
  • Both the solvent and hot air come from the same equipment consisting of a hydraulic solvent pump and an air compressor.
  • the "injectors" (52) consisting of an inlet tube of greater section and six ducts that make up the injection nozzles. For those nozzles comes out sprayed the solvent while washing the inker-humidifier. After the washing is finished, drying continues, for which hot air is injected through the same nozzles that previously injected the solvent.
  • the device has a built-in gear to generate the movement of the rollers of the inking-humidifier. This movement is carried out by an armored electric motor (51) that is activated during the entire washing and drying process.
  • Fig. 37 shows the complete printer where all the following devices appear:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

Cette machine pour impression lithographique de fer blanc par offset est caractérisée en ce qu'elle comprend un cylindre central (3) présentant à l'intérieur une série d'électroaimants (15) autour duquel sont placés une série de postes d'impression, chacun comprenant un cylindre rembourré ou en caoutchouc (2) en contact avec un cylindre impresseur (1) et avec le cylindre central (3). On prévoit un dispositif d'encrage-humectage amovible (4) et un dispositif d'excentriques (5) pour déplacer le cylindre (2). Chaque dispositif d'encrage-humectage amovible comprend deux cylindres poreux (110) à injection d'encre et d'eau et une série de cylindres supplémentaires distribuant l'eau et l'encre. La machine comporte en outre une roue d'échange (4) contenant des logements (41) coïncidant avec les logements ménagés dans l'imprimante, dans lesquels reposent les dispositifs d'encrage/humectage (4). Ces dispositifs amovibles et interchangeables glissent manuellement ou automatiquement et se placent dans les logements de la roue d'échange (4) en vue de leur retrait, échange ou lavage dans un poste de lavage (48).
PCT/IB2006/001955 2005-07-06 2006-07-06 Machine pour impression lithographique de fer blanc WO2007004053A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ARP20050102815 2005-07-06
ARP050102815A AR051361A1 (es) 2005-07-06 2005-07-06 Una maquina para la impresion litografica de hojalata

Publications (2)

Publication Number Publication Date
WO2007004053A2 true WO2007004053A2 (fr) 2007-01-11
WO2007004053A3 WO2007004053A3 (fr) 2007-04-26

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PCT/IB2006/001955 WO2007004053A2 (fr) 2005-07-06 2006-07-06 Machine pour impression lithographique de fer blanc

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DE2704527A1 (de) 1976-02-05 1977-08-18 Dayco Corp Vorrichtung zum beschriften von blattmaterial
GB2017003A (en) 1978-03-13 1979-10-03 Toshin Kogyo Co Offset or lithographic printing process and apparatus for formation of continuous patterns
EP0092279A2 (fr) 1982-04-20 1983-10-26 Jacobus Hendrikus Van Leusden Dispositif de commande pneumatique par moteur à air, par exemple, pour dispositif de levage
AU8974782A (en) 1981-04-15 1984-05-03 Cymaticolor Corp. Process colour offset painting duplicator
JPH0472260A (ja) 1990-07-10 1992-03-06 Kanetetsuku Kk 磁気ローラ
US5406885A (en) 1991-05-20 1995-04-18 Pitney Bowes Inc. Inking cartridge
US5660108A (en) 1996-04-26 1997-08-26 Presstek, Inc. Modular digital printing press with linking perfecting assembly
US6389967B1 (en) 1999-08-10 2002-05-21 Neopost Limited Ink dispenser

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US1379365A (en) * 1920-11-13 1921-05-24 Oswald R Schultz Method of and apparatus for making multicolor prints
GB957533A (en) * 1961-11-30 1964-05-06 Metal Box Co Ltd Improvements in or relating to lithographic printing machines
GB8611722D0 (en) * 1986-05-14 1986-06-25 Drg Uk Ltd Processing paper & other webs
US4854232A (en) * 1986-10-13 1989-08-08 Dainippon Screen Mfg. Co. Ltd. Method and apparatus for multi-color printing
DE69225201T2 (de) * 1991-12-03 1998-08-13 Crown Cork & Seal Co Verfahren und Vorrichtung zum Bedrucken vonmehrfarbigen Zuschnitten für Behältermäntel in einem einzigen Durchgang
US5282419A (en) * 1992-02-29 1994-02-01 Koenig & Bauer Aktiengesellschaft Ink roller
DE4327278C5 (de) * 1993-08-13 2005-09-22 Maschinenfabrik Wifag Traggestell für eine Rollenrotationsdruckmaschine
EP2189286B1 (fr) * 2003-06-30 2016-08-10 KBA-NotaSys SA Machine et procédé d'impression
US6886458B1 (en) * 2003-12-18 2005-05-03 Shinohara Machinery Co., Ltd. Apparatus for adjusting printing pressure of satellite-type printing press

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704527A1 (de) 1976-02-05 1977-08-18 Dayco Corp Vorrichtung zum beschriften von blattmaterial
GB2017003A (en) 1978-03-13 1979-10-03 Toshin Kogyo Co Offset or lithographic printing process and apparatus for formation of continuous patterns
AU8974782A (en) 1981-04-15 1984-05-03 Cymaticolor Corp. Process colour offset painting duplicator
EP0092279A2 (fr) 1982-04-20 1983-10-26 Jacobus Hendrikus Van Leusden Dispositif de commande pneumatique par moteur à air, par exemple, pour dispositif de levage
JPH0472260A (ja) 1990-07-10 1992-03-06 Kanetetsuku Kk 磁気ローラ
US5406885A (en) 1991-05-20 1995-04-18 Pitney Bowes Inc. Inking cartridge
US5660108A (en) 1996-04-26 1997-08-26 Presstek, Inc. Modular digital printing press with linking perfecting assembly
US6389967B1 (en) 1999-08-10 2002-05-21 Neopost Limited Ink dispenser

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WO2007004053A3 (fr) 2007-04-26

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