DE2215532A1 - ROLLER PRINTING MACHINE - Google Patents

Description

Applicant: Johann Heinrieh Saueressig, 4421 Wüllen / Ahaus "Roller printing machine"

The invention relates to a roller printing machine ziw • Printing of material webs, in particular for printing paper, plastic and metal foil webs with a number of printing rollers arranged one above the other and driven by a common drive.

Roller printing machines of the aforementioned type are in particular used to print multicolored patterns on continuous material webs; where when passing each of the rollers successively prints different colors or different designs on the web.

The known roller printing machines have a disadvantage but shown that the throughput speed of the webs to be printed is only limited that the colors on the web between successive rollers do not dry quickly enough or that with the use of quick-drying inks dry them on the pressure roller that the height repeat only difficult to adjust and that color changes only uneconomical and made with long downtimes can be.

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In contrast, it is the object of the invention to provide a roller printing machine to provide the aforementioned disadvantages and the disadvantages of the prior art overall no longer adheres and which in particular allows the use of quick-drying inks, which allows the colors to dry between the roller sets, which is simply structured and can be handled easily, quickly and safely, in which the material webs at high speed can go through, which allows easy adjustment of the height repeat, both for Relief printing as well as gravure printing can be used and which is universal for material webs and for a wide variety of colors Kind is usable.

According to the invention, this object is achieved by that the roller printing machine has deflection means that the web between two successive Guide the printing rollers outside the plane of the printing rollers, the deflection means advantageously deflecting can be tubes with porous walls, from which compressed air exits and with the material web opposite the deflection pipe is separated by a compressed air cushion,

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The web of material is able to move around the deflector without friction pipe to be led around, the escaping pressure * air dries the colors applied to the web at the same time,

In order to dry the colors more quickly, air can also continue to flow onto the from the drying nozzles Material webs deflected from the printing plane are inflated and the web can be moved over additional deflection rollers in the printing plane can be returned to the inlet to the next printing roller.

The impression rollers can advantageously be driven separately and the drive of the pressure rollers and the impression rollers can take place by means of compressed air motors, whereby the costly explosion protection for the drive motor can be dispensed with. ' ⁵

To enable quick drying paint to be applied, the pressure rollers run directly inside the ink trays, with the ink from next to it deh pressure rollers lying ink distribution rollers and distributed by a doctor blade, which is located on top of the pressure roller is located near the highest point of the roller circumference, is doctored.

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If the roller printing machine according to the invention is used as a relief printing machine, it is of course not necessary this squeegee and dig staining is going over that Ink distribution roller applied to the pressure roller.

About the distance between the squeegee and your pressure point To keep it small, the point of contact is with the impression roller or with a smaller one Auxiliary pressurizing roller also near the highest point of the roller circumference * The plane through the axes the pressure and press roll increases so to the Impression rollers strongly on.

It is still necessary to set the height repeat proved to be advantageous »the deflection tube at both ends at a distance from the plane of the pressure rollers to make adjustable «

For easy cleaning of the color units and a The ink trays, the ink distribution rollers and the Squeegees combined in a dye gate * softens can be swiveled out after lowering the paint trays *

3098A0 / 02ÖÖ

22Ί5532

In the following an embodiment of the invention will be described next with reference to drawings. Show it:

Fig. 1 is a vertical section through a printing press according to the invention,

Fig. 2 is a horizontal section through a pressure roller according to the invention at the level of the deflection tubes and .

3 shows a view of the printing press according to the invention with the ink gate open. ,

According to FIG. 1, the web runs through the printing machine from top to bottom. Are on a stable frame 1 arranged one above the other at certain intervals spinning rollers 2, which in a known manner over a common Drive 11 are driven and rotate. The paint to be applied is in paint trays 5, in which immerse the pressure rollers 2. In addition to the pressure rollers 2 are dye distribution rollers 4 are arranged, which the color Spread on the surface of the printing rollers and in the direction of rotation behind it, doctor blades 3 are arranged near the highest point of the roller circumference, which remove the excess Color abrakeIn. In the direction of rotation behind the The highest point of the pressure rollers 2 is the point of contact

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with the impression roller 6 or with one in between lying auxiliary pressur 7. It can be seen that the path between the squeegee and the point is now of oppression, the starting point of the impressionist, extremely small. The centers of the impression roller - pressure rollers are therefore not, as usual, on a horizontal plane, but the plane through the center points increases sharply in the direction of the impression roller.

The material web becomes after passing through the printing point deflected out of the pressure plane by a deflection tube 8 which has a porous wall the compressed air escapes from the interior of the pipe. Between the web and the surface of the deflection tube 8 a compressed air cushion forms, which guides the material web around the pipe without friction. The exiting compressed air continues to dry the applied paint, so that it enters the next print roller is completely dry. The drying effect can be achieved with additional drying nozzles be reinforced; the drive 11 of the printing rollers and the drive 12 of the impression rollers can be operated with compressed air take place from the same pressure medium source that also

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the UmIenkrohr 8 and the drying nozzles with compressed air »lim supplies the web of goods with the correct one Position for entry into the following pressure roller closed bring * there is a return roller 9 in the print level arranged.

The paint trays 5 are arranged in a dye gate 13, which is hinged to the frame 1 and which is also the ink distribution rollers 4 and the doctor blades holds. The Fafbwattnen 5 are opposite the paint gate 13 can be lowered so that the inner edge of the pivot the color gate 13 from the lowest point of the pressure rollers 2 comes free. The lowering can be over a linkage for all paint trays take place at the same time; but it is also the lowering of the individual Color tubs possible.

The deflection tube 8 is adjustable in the horizontal direction in the frame 1, and the tubular repeat can be set for the Waiöibahn by setting the distance between the Umlejik tube 8 and the printing plane. Since the pipe is at its ken: with (bold bearing points are set independently, a one-sided adjustment of the height repeat is also possible * In order to enable an even.

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this advantageously consists of a porous sintered material; the compressed air in your pipe has e.g. an overpressure between 0.5 and 5 ätü.

Devices are also attached to the doctor blades 3 in order to align them with respect to the printing roller to be able to. If the printing roller machine according to the invention works as a relief printing machine, can the squeegee is removed and the ink is then applied via the ink distribution roller 4.

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Claims (9)

PATENT CLAIMS Γ 1jRoller printing machine for printing webs of material, especially for printing paper, plastic and metal foil webs, with a number of • pressure rollers arranged on the other, driven by a common drive, characterized by deflection means (8), the web of material between two consecutive pressure rollers (2) outside the plane the pressure rollers lead. 2. Roller printing machine according to claim 1, characterized in that that deflection pipes with porous walls are used as deflection means (8) through which a compressed air cushion between the pipe surface and the material web creating compressed air escapes. 3. Roller printing machine according to claim 1 or 2, characterized characterized in that they are operationally behind the Um'Jerkmittel (8) arranged auxiliary deflection means (9) for Has return of the web of material in the printing plane. 4. roller printing machine according to claim 1 to 3, characterized characterized in that the point of contact of the pressure roller (2) with the impression roller (6) or the smaller one Auxiliary pressurized roller (Y) near the highest point of the 309840/0209 Print roller circumference is and the plane rises sharply through the axes of the printing and impression rollers. 5. roller printing machine according to claim 1 to 4, characterized characterized in that the pressure rollers rotate directly within the ink trays (5), next to the pressure rollers (2) Ink distribution rollers (4) are arranged and located near the highest point of the circumference of the There are pressure rollers (2) squeegees (3) for squeegeeing off the excess ink. 6. Roller printing machine according to claim 1 to 5, characterized in that the impression rollers (6) have a Drive (12) are driven evenly and separately, whereby both the drive of the impression roller (6) as well as the drive (11) of the pressure rollers (2) are designed as compressed air motors. 7. roller printing machine according to claim 1 to 6, characterized characterized in that the deflection means (8) at its two Ends a simple adjustment of the height repeat possible in the distance to the level of the pressure rollers adjustable are. 309840/0209 8. roll spinning machine according to claim 1 to T, characterized in that; that the color walls (5) can be lowered and the paint trays, the paint distribution ' rollers (4) and the doctor blades (3) combined to form a dyeing agent are which. can be swiveled out after lowering eggs (5) a, from its working position a. 9. Roller printing machine according to one of the preceding Claims, characterized by dry nozzles ("TO) for Drying of the continuous material web, which is in the direction of flow the material web yor and / or are arranged behind the deflection means (8). 309840/0209 Blank page