DE102006003798A1 - Production of image effects which change according to angle on a printed product in a printing machine comprises forming a printed subject on the printed product by applying an ink layer and further processing - Google Patents

Abstract

Production of image effects which change according to angle on a printed product in a printing machine comprises forming a printed subject on the printed product by applying an ink layer, partially or completely applying a primer layer on the printed product, applying a lacquer to the primer layer and drying an hardening. An independent claim is also included for a device for producing image effects which change according to angle on a printed product in a printing machine. Preferred Features: The ink layer of the printed subject is dried or hardened. The primer layer is dried or hardened. The primer layer is transparent or translucent.

Description

The The invention relates to a method and a device for generating from viewing angle dependent changeable Image effects on a substrate in a printing press after the preamble of claim 1, 6 and 7. The viewing angle dependent variable Image effects are especially multi-dimensional image effects (2D or 3D effects) or image effects caused by the tilt effect.

It are known as lenticular images on printing materials, which dependent changeable from the viewing angle Have image effects. On the substrate is one from one or applied to several individual images composite printed image, where the substrate (with or without print image) with a lenticular sheet from a transparent or at least partially transparent plastic material is laminated as a cover layer. Lenticular films have lenticular Elevations with convex curved or cylindrical elevation structures (lenticular elements). According to the optical law of refraction, when viewed considering of refractive index and thickness of the lenticular sheet material as possible holistic picture without phase shifted sequences.

Usually become the so-called lenticular films in different resolutions and thus Also corresponding film thicknesses as a semi-finished product to the back Printing offered. The lenticular foil can thus even the Be printed by this back is printed or formed with or without a back printing Lenticular foil can be used with a substrate (with a printed matter) Laminating be connected.

Such Films form a considerable one, especially for larger print formats Cost factor. Together with the format-dependent elaborate form preparation and the technically complex implementation thus arise more Costs. Furthermore, the printed matter must fit precisely on these slides can be arranged and the slides in turn have to fit accurately be applied to the substrate. Once the relationship between Printed matter and / or printing material and the lenticular elements of Film is not register accurate, the 2D or 3D effect or the tilting effect disturbed or get lost.

For example DE 10 2004 037 825 A1 It is known to produce a security element for security papers, documents of value etc. with a transparent or translucent film having a surface relief in the form of a lenticular grid. The lenticular grid is created photolithographically or electron beam lithographically in a photoresist layer and transferred by means of a foil stamping process into an embossable foil (lenticular foil).

task The invention is a method and a device of the above to create the type mentioned in a printing press the desired Create image effects in inline process on a substrate. Furthermore, it is the task of a substrate with the desired To create image effects.

Is solved the task by the training features of claim 1, 6 and 7. Further developments emerge from the dependent claims.

One The first advantage of the invention is due to the fact that now in a Inline process in a printing machine, preferably in multi-color printing with at least The basic colors Cyan, Magenta, Yellow, the desired image effects on one Printing material can be produced and that the usual one Application of lenticular sheets to a substrate by lamination or the backside printing the lenticular sheets by an applied in the printing machine Paint technology replaced becomes.

When second advantage can be given be that the coating technology over the application to the Printing material and the production of lenticular films noticeably cheaper is. Due to the composition of the paint as well as by the paint technology when applied to the substrate can be special optical lens body on the substrate, in particular by a targeted influence of molecular forces at the interface and inside the paint and / or by interacting with Lack accepting or repugnant Areas, generate. Thus, compared to a lenticular foil, further, individual image effects can be achieved.

One third advantage is that the generation of the desired Image effects as full-surface effects or as a single spot effect or multiple spot effects on one Printing material is or is feasible. This is a more flexible Use of the substrates provided with individual image effects permitted, for example in packaging and advertising print jobs.

As a fourth advantage, it can be mentioned that the image effects which can be produced on a printing material are produced by means of the printing substrate surface (with or without ink layer) as well as a primer (adhesion promoter, primer coating) and at least one lenticular element (lens body). For this purpose, conventional offset or flexographic printing works, including flexographic printing, can be used. The substrate surface (with or without ink layer) itself and a transparent or semi-transparent primer layer applied to this substrate surface prepares the surface of the printing substrate (with or without ink layer and with at least partially arranged primer) for a subsequent coating in different wettable. The primer layer can be applied over the entire surface or partially on the printed or unprinted printing substrate. The coating applied subsequently forms optical lens bodies on the primer layer and / or the printing substrate (with or without printing ink) for the special image effects on the printing substrate.

The Invention is intended to an embodiment be explained in more detail. Here are shown schematically:

1 a sheet-fed press in a row construction,

2 a substrate with partial primer application,

3 a substrate with full-surface primer application,

4 a substrate with perfecting side.

The sheet-fed press according to 1 consists of several, arranged in series printing units 1 , For multi-color printing are several, for example, four or six, of these printing units 1 , in particular offset printing, provided. The printing units 1 is known to be an investor (not shown) upstream. Each of these preferred offset printing units 1 consists of one impression cylinder each 19 , the same time sheet guiding cylinder 9 is, depending on a plate cylinder carrying a printing plate 6 with assigned inking unit 7 (and if necessary with assigned dampening unit) and one blanket cylinder each 8th , The conveying direction 5 to be processed, sheet-shaped substrate 18 is shown with an arrow. Alternatively, the printing units 1 also flexographic printing or combinations of offset and flexo printing works.

In the conveying direction 5 last printing unit 1 is at least a coating unit 2 downstream. Every coating unit 2 consists of an impression cylinder 19 , the same time sheet guiding cylinder 9 is, a form of a cylinder carrying a paint form 10 and a form cylinder 10 associated metering system 11 . 12 , The dosing system 11 . 12 is for example by a to the forme cylinder 10 adjustable / screened, screened applicator roller 11 and an associated chamber doctor 12 educated. Preference is given to the first coating unit 2 at least one further, preferably identical coating unit 2 in the conveying direction 5 downstream. For clarity, this machine configuration is not in 1 shown. Every coating unit 2 can also be designed as a flexographic printing unit.

For the sheet transport are between the printing / coating plants 1 . 2 Sheet guiding cylinder 9 arranged as a transfer cylinder, which can be formed at at least one turnaround device at a operable in perfecting printing press as at least. In conveying direction 5 is the last coating plant 2 a boom 3 with a revolving conveyor system 4 subordinate to the sheet storage. The printing units 1 as well as the coating plants 2 is after the nip (contact point of blanket cylinder 8th and impression cylinder 19 ) and the painting gap (contact point of form cylinder 10 and impression cylinder 19 ) one dryer each 13 the impression cylinder 19 arranged adjacent.

If necessary, between the last printing unit 1 and the first coating plant 2 and / or between two coating plants 2 additionally be arranged a dryer section. Such dryer sections are known, for example, from EP-A-1 502 739.

The sheet guiding cylinder 9 (including impression cylinder 19 ) are formed with double-sized diameter and thus have two circumferentially diametrically arranged sheet holding means, preferably gripper systems on.

The Sheet turning facilities can according to the principle of trailing edge use as a single-drum or three-drum turning accomplished be.

The printing works 1 are suitable for printing first color systems having radiation-curing or curing inks, as well as second color systems having oil-based colors, preferably offset inks.

In a further development, at least one printing unit 1 have an associated coating unit. Such a training is for example DE 20 2005 003 607 U1 or DE 197 29 985 A1 known. Such designs are for the multi-color printing as a printing unit 1 or the painting job as a coating unit 2 a settable.

With this device, the following process is realized: An in the investor provided sheet-shaped substrate 18 is recorded and in the conveying direction 5 the printing units 1 fed. In the printing units 1 is by means of the blanket cylinder 8th the respective color on the substrate 18 übertra so that on the substrate 18 by applying at least one color layer, a preferably multicolored printed matter 14 is produced.

For radiation drying or curing inks of the printed matter 14 These are by means of the respective dryer device 13 dried before the substrate 18 the next printing unit 1 or coating unit 2 in the conveying direction 5 is supplied.

In the conveying direction 5 next printing unit 1 or the first, the printing units 1 downstream coating unit 2 After that, it will be printed 14 bearing substrate 18 a primer layer 15 applied. The primer layer 15 can be used as a full-surface coating or as a spot coating (partially), preferably taking into account the Drucksujets 14 to be applied. For application of the primer layer 15 For example, an oil-based varnish, a dispersion varnish or, preferably, an ultraviolet (UV) varnish may be used. Depending on the lacquer used, the gloss levels of the substrate are combined with the following applications 18 or the printed matter 14 as well as the image effects, for example divergent, influenced. For the purposes of the invention, it is necessary for the surfaces in their polarity and thus in their surface energy / stress to sufficiently differ from the respective substrate (for example printed / unprinted printing material surface) with regard to the desired effect of the different paint acceptance or paint repellency , The primer layer 15 is preferred by means of a dryer device 13 dried or hardened. This is indicated by the blanket cylinder 8th or the form cylinder 10 a dot or line grid (matrix) forming printing form.

In another downstream printing unit 1 , For example, flexographic printing, or downstream coating unit 2 is then by means of the enamelled printing form or wetted with a lacquer paint form on the with the primer layer 15 provided spots a varnish 16 , preferably a UV varnish applied in at least one layer. The paint 16 forms between on the primer layer 15 (full-surface or partial) individual lens body 17 from, by the surface properties of the printing material 18 or printed matter 14 as well as the interfacial tension of the paint 16 are maintained. The lens body 20 can be a cylindrical or as in 2 shown to have a convex lens contour. The training of the lens body 20 is by deliberately influencing the molecular forces at the interface and in the interior of the paint and / or by the interaction with paint accepting or repellent areas of the printing material 18 , the printed matter 14 or the primer layer 15 influenced. Following the application of the paint 16 becomes the sheet-shaped substrate 18 by means of a dryer device 13 dried or hardened, leaving the paint 16 to lens bodies 17 is dried or cured.

If necessary, in at least one other coating unit 2 at least a second layer of the paint 16 on the lens body formed by the first layer 20 be applied. The second and each additional layer of the paint 16 is each dried or cured.

In summary, a device for generating viewing-angle-dependent changeable image effects on a printing substrate in a printing press, wherein the image effects can be achieved by a lenticular layer arranged on the printing substrate, is constructed as follows. The printing press is in the conveying direction 5 a printing material from printing units 1 formed for multicolor printing. Another printing unit 1 or one of the printing units 1 after ordered coating unit 2 is for applying a primer layer 15 on the substrate 18 arranged. The primer layer 15 generating printing or coating unit 1 . 2 is another coating unit or flexographic printing unit 2 for applying a paint 16 on the substrate 18 downstream. Here is the paint gap of the paint or flexographic printing 2 one on the substrate 18 located paint 16 drying or curing drying device 13 in the conveying direction 5 downstream.

To generate the primer layer 15 points the plate cylinder 6 of the printing unit 1 or the form cylinder 10 of the coating plant 2 one the primer layer 15 (partial or full surface) forming printing form. The varnish or flexographic printing unit 2 has a forme cylinder with a the formation of the lens body 17 (Lenticular functional layer) generating printing form.

In a further embodiment, the lenticular functional layer instead of by means of a conventional paint or flexographic printing 2 by means of a paint 16 processing ink-jet device on the primer layer 15 be applied. The ink-jet device is thus the coating unit 2 , Here, the primer layer 15 preferably over the entire surface of the substrate 18 be applied. The from the paint 16 formed lens body 17 are dropped onto the primer layer by the ink-jet device 15 applied and dried or cured.

• – Aufbringen wenigstens einer Farbschicht auf den Bedruckstoff zur Erzeugung des Drucksujets 14,
• – im Anschluss folgt ein partielles oder vollflächiges Auftragen einer Primerschicht 15 auf den Bedruckstoff 18, und
• – danach ein Auftragen von Lack 16 auf die Primerschicht 15 mit abschließendem Trocknen bzw. Härten des Lackes 16 zu Linsenkörpern 17,

eine lentikulare Funktionsschicht auf dem Bedruckstoff 18 erzeugt werden kann.In addition, it should be noted that a substrate 18 in a printing machine with at least one turning device also printed on both sides (recto printing side and reverse printing side) and at least on one side (recto printing and / or reverse printing) by the method according to the invention

• - Applying at least one color layer to the substrate for generating the Drucksujets 14 .
• - Followed by a partial or full-surface application of a primer layer 15 on the substrate 18 , and
• - then apply paint 16 on the primer layer 15 with final drying or curing of the paint 16 to lens bodies 17 .

a lenticular functional layer on the substrate 18 can be generated.

In such a printing press can on the substrate 18 Also on both sides (recto print side and reverse side) a lenticular functional layer can be applied. For the one-sided application of such a lenticular functional layer, the sheet-shaped printing material is preferred 18 On one side, for example on the reverse side, printed (if necessary, also painted), then the sheet-shaped substrate 18 turned in a turning device, preferably according to the principle of trailing edge, and then on the other side, for example, the recto printing side, the substrate 18 with at least one color layer for the purpose of producing the printed matter 14 printed. This is followed by a partial or full-surface application of a primer layer 15 on the substrate and then applying paint 16 as a lenticular functional layer on the primer layer 15 with final drying or curing of the paint 16 to lens bodies 17 ,

For the one-sided application of such a lenticular functional layer on a transparent or translucent substrate 18 , For example, film, is preferably the sheet-shaped substrate 18 On one side, for example on the reverse side, printed mirror-inverted (if necessary, also painted), then the sheet-shaped substrate 18 turned in a turning device, preferably according to the principle of trailing edge, and then on the other side, for example, the recto printing side, the substrate 18 with at least one color layer for the purpose of producing the printed matter 14 printed. This is followed by a partial or full-surface application of a primer layer 15 on the substrate and then applying paint 16 as a lenticular functional layer on the primer layer 15 with final drying or curing of the paint 16 to lens bodies 17 ,

1

printing unit

2

coating unit

3

boom

4

conveyor system

5

conveying direction

6

plate cylinder

7

inking

8th

Blanket cylinder

9

Sheet guiding cylinder

10

form cylinder

11

applicator roll

12

chambered doctor blade

13

drying device

14

print motif

15

primer layer

16

paint

17

lens body

18

substrate

19

Impression cylinder

Claims (7)

Method for generating image effects which can be changed depending on the viewing angle to a printing substrate in a printing machine, wherein the image effects are achieved by a lenticular layer arranged on the printing substrate, characterized in that a printed matter is produced by applying at least one color layer to the printing material, then partially or a primer layer is applied over the entire area of the printing material, that thereafter a lacquer is applied to the primer layer as a lenticular functional layer, and finally the lacquer is dried or hardened into lens bodies. Method according to claim 1, characterized in that that the ink layer of the Druckuujets dried or cured. Method according to claim 1, characterized in that that the primer layer is dried or cured. Method according to claim 1, characterized in that that the primer layer applied transparent or translucent becomes. Method according to claim 1, characterized in that that the paint is applied as a UV coating on the substrate. Device for generating image effects which can be changed as a function of the viewing angle onto a printing substrate in a printing machine, the image effects being achievable by means of a lenticular layer arranged on the printing substrate, characterized in that the printing press is arranged in the conveying direction (FIG. 5 ) of a printing material from printing units ( 1 ) for multicolor printing is that a printing unit ( 1 ) or the printing units ( 1 ) by ordered coating unit ( 2 ) for applying a primer layer ( 15 ) on the substrate ( 18 ) is arranged such that the primer layer ( 15 ) generating printing or coating unit ( 1 ; 2 ) another coating unit or flexo printing unit ( 1 ; 2 ) for applying a paint ( 16 ) on the substrate ( 18 ) and that the lacquer gap of the flexo or coating unit ( 1 ; 2 ) one on the substrate ( 18 ) paint ( 16 ) drying or curing drying device ( 13 ) is subordinate. Printing substrate with image effects which can be changed depending on the viewing angle, wherein the image effects can be achieved by means of a lenticular layer arranged on the printing substrate, characterized in that on the printing substrate ( 18 ) a Drucksujet is arranged as a color layer that on the substrate ( 18 ) partially or completely a primer layer ( 15 ) is arranged such that at least on the primer layer ( 15 ) a paint ( 16 ) is arranged as a lenticular functional layer, wherein the lens body ( 17 ) of the lenticular functional layer through the lacquer ( 16 ) repellent properties of the primer layer ( 15 ) are formed.