DD282663A5 - ORDERING FOR PRINTING MACHINES - Google Patents

Abstract

The invention relates to an applicator for printing machines, especially sheet-fed offset printing machines, for applying high-viscosity, oelhaltigen or low-viscosity Wasserloeslichen layers, defined thickness, on the substrate. Object of the invention; to create a commissioned work for printing presses, which is universally applicable and contributes to minimize the assembly effort and to increase the flexibility of the printing press; is solved by dasz that is arranged on the last printing unit of a printing press designed as a coating unit commissioned work for the application of pasty, oelhaltigen layers can be used. Fig. 1 {Printing Machine; Inking; varnishing}

Description

Although the use of the last printing unit has been known for some time as a coating unit, the advantage of using the coating unit also as an inking unit was not recognized, whereby the flexibility of the printing press can be increased to a decisive extent with simple means.

By means of the invention it is possible to combine in a meaningful way other printing methods in order to utilize the advantages over the offset (eg metal color printing in the high-pressure method or intaglio printing).

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing show:

Fig. 1: schematic representation of an applicator, suitable for Offsetds uck Fig. 2: commissioned work, applicable for gravure printing

Fig.3: Auftragweik, can be used for flexo or flexo printing.

1, a commissioned work 2 is arranged on the printing cylinder 1 especially of the last printing unit, which once zürn painting and on the other can be used as an inking unit in the offset printing process. This commissioned work 2 consists essentially of a form cylinder 3, a transfer roller 4 and provided with cups scoop roller 5, which dips into a liquid container 6. In the immediate vicinity of the scoop roller 5, an adjustable doctor blade 7 is arranged.

The transfer roller 4 carries a plurality of smoothing rollers 8, while a generally known dampening unit 9 is employed on the forme cylinder 3. The printing cylinder 1, the forme cylinder 3 and the transfer roller 4 are driven at the machine speed.

The smoothing rollers 7 receive their rotational movement by friction from the transfer roller 4, which will at the same time be an axial movement, in order to achieve an optimum layer thickness distribution.

The forme cylinder 3 carries an offset printing plate (printing and non-printing areas lie in one plane) or a blanket for full-surface painting.

Depending on the requirement, the dampening unit 9 is turned on or off by the forme cylinder. The squeegee 7 is used for predosing the transferred color or the paint and is therefore movably mounted.

FIGS. 2 and 3 show other embodiments of the commissioned work 2.

In Fig. 2 the commissioned work 2 is designed as a gravure printing unit. Here, the ink transfer, starting from a rotating in a liquid container 6 applicator roll 10 via the rastered forme cylinder 3 on the impression cylinder 1. The adjustable doctor blade 7 is arranged in this application to the forme cylinder 3.

Fig. 3 shows the commissioned work 2 as Hoch- or flexographic printing.

In contrast to FIG. 1, the forme cylinder 3 carries a high-pressure mold, i. H. the printing area shares are increased compared to the non-printing, which can be dispensed with the dampening unit 9 due to the process.

Apart from the use as an inking unit, the embodiment is particularly well suited for recessed painting, i. H. only certain parts of the printing material are painted, z. B. for cartons. This design of the commissioned work 2, especially the last printing unit, allows the printer for the first time to provide his print product either with a full or partial glossy coating or an additional inking using one of the three main printing process according to requirement and indeed with a single machine run.

For example, gold inks, luminous colors or aniline colors can be easily processed to print on variable or colored subjects. A changeover from painting to dyeing or vice versa would only result in a change of the printing forme, of the Me.lium to be transferred (lacquer, paint) and on or off of the dampening unit 9 according to the first embodiment.

Claims (5)

claims: 1. commissioned work for printing machines, especially sheetfed offset printing machines, for applying low-viscosity water-soluble layers on a substrate, characterized in that the last printing unit of a printing machine arranged as a coating unit commissioned work (2) is also used for applying pasty, oil-containing layers. 2. commissioned work according to claim 1, characterized in that the commissioned work (2) is designed as an offset printing unit, consisting of a with a printing cylinder (1) in physical contact form cylinder (3), a transfer roller (4) and a profiled scoop roller (5) , wherein on the transfer roller (4) a plurality of smoothing rollers (7) and on the scoop roller (5) a doctor blade (7) is arranged. 3. commissioned work according to claim 1, characterized in that the commissioned work (2) is designed as a gravure printing unit, consisting of an applicator roll (10) and a provided with cups form cylinder (3) on which a doctor blade (7) anstel'bar. 4. commissioned work according to claim 1, characterized in that the commissioned work (2) is designed as a high-pressure unit, consisting of a with a pressure cylinder (Din body contact standing form cylinder (3), a transfer roller (4) and a profiled scoop roller (5) a doctor blade (7) is assigned. 5. commissioned work according to claim 2, characterized in that the form cylinder (3) is associated with a dampening unit (9). For this 1 page drawings Field of application of the invention The invention relates to a commissioned work for printing machines, especially sheet-fed offset printing machines, for applying high-viscosity, oily or low-viscosity water-soluble layers, defined thickness, on the substrate. Characteristic of the known state of the art The task of a printing press, as is generally known, is to print the substrate, be it web-shaped or arc-shaped, with different motifs or sujet defined by means of the printing plate and then, if appropriate, to finish it with the aid of a glossy coating. For the application of this image, whether single or multi-colored, in principle two commissioned works, the dyeing and dampening unit are required in the offset printing process. From this order, the image becomes indirect, i. transferred via a blanket cylinder on the attached to a printing cylinder substrate. In order to give the printed product a higher finishing form (gloss) or to avoid the freshly printed sheet from lying on the delivery pile, in recent years coating plants, e.g. B. according to DE-AS 20 20 584 become known, which cooperate with the rubber or pressure cylinder of the last preferably Duckwerkes. Another way to apply a coating layer on the substrate consists according to DD-PS 207 358 is to use a dampening unit also for painting. A disadvantage of these commissioned works, especially the separate coating unit on the last printing unit is the uneucktive use of this module only as a coating unit. Object of the invention The object of the invention is to provide an applicator for printing presses, which contributes to the increase in utility of the printing press. Explanation of the essence of the invention The object of the invention is to provide a commissioned work for printing presses, which is universally applicable and helps to minimize the assembly cost and to increase the flexibility of the printing press. According to the invention, the object is achieved in that arranged at the last printing unit of a printing press designed as a coating unit commissioned work also for the application of pasty, oily. Layers can be used. The commissioned work is designed as an offset printing unit, consisting of a standing with a pressure cylinder in physical contact form cylinder, a transfer roller and a profiled scoop roller, wherein on the transfer roller several smoothing rollers and on the scoop roller a doctor blade is arranged. The form cylinder is assigned a dampening unit. The commissioned work is designed as a gravure printing unit, which consists of an applicator roll and a provided with cups form cylinder to which a doctor is adjustable. The commissioned work is designed as a high-pressure unit and consists of a standing with a pressure cylinder in physical contact form cylinder, a transfer roller and a profiled scoop roller, which is associated with a doctor blade.