ES2273598B1 - MANUFACTURING PROCESS OF LABELS THROUGH SERIGRAPHIC TECHNIQUE OF VARNISH APPLICATION FOR CONFORMATION OF ALTORELIEVES IN FIGURES AND LETTERS THAT FACILITATE THE TOUCH READING IN ADDITION TO THE VISUAL. - Google Patents

Abstract

A process is described by which it is possible to form labels or signs of the type that use high-relief writing centered on the stroke, which can be read and interpreted both visually and tactilely. Starting from a label and by means of a serigraphic process of certain characteristics, reliefs are obtained in the desired areas without the original label losing or diminishing any of its characteristics, not even the photoluminescence.

Description

Label manufacturing process through screen printing technique for varnish application High relief in figures and letters that facilitate tactile reading In addition to the visual.

Object of the invention

The present invention relates to a process of  conformation of labels of the type that use writing in relief centered on the stroke, which provides essential novelty characteristics and notable advantages over systems and means known and used for the same purposes in The current state of the art.

More specifically, this process is applicable to the creation of high relief on photoluminescent signs, although not exclusively as others can be taken as support materials, such as vinyl or paper.

More particularly, the invention proposes a novel process of shaping the writing that constitutes this type of labels, by means of which one obtains, on the one hand, keep the photoluminescence conditions of the base intact, and, on the other hand, a much cheaper manufacturing process The higher the production.

Basically, the process is as follows: about the support plate or substrate (which can be photoluminescent or not) a mesh formed by threads is placed and surrounded by a frame metal. An emulsion is applied over it (not very sensitive and very dense emulsion suitable for very thick layers on open tissue), and on this a negative is placed.

This negative distinguishes the areas we want harden (creation of high relief) of those that do not.

On this set we expose the light and we will subsequently clean the emulsion from the mesh hardened.

Through the holes generated in the emulsion the varnish is allowed to flow (somewhat special for the purpose specified) and is deposited on the substrate.

After a drying process it will finally be the desired relief.

Background and summary of the invention

It is known by all in general the difficulties associated with certain population groups for reading and / or interpreting text messages and / or graphics motivated by the reduction of their visual capacity, as is the case, for example in the case of the elderly or Other groups in which apart from presenting a notable visual reduction, are not knowledgeable about the "Braille" language of dot writing. This situation has been contemplated in the "rules on accessibility" which, in its "Signage" section, in which it is defined and described as `` Highlight writing centered on the stroke '', that is, text messages and / or graphics that are aimed at this population sector, and in which normal printing is combined simultaneously with the writing of points. In the current state of the art, there are processes for the preparation of posters or signs that meet these requirements (such as for example the patent n ° 200402743, “ Process of forming signage signs of the type that use writing in Altorrelieve centered in the stroke and writing `` braille '' , although there is an important gap: emergency signaling, which must be photoluminescent.These processes eliminate or deteriorate the photoluminescent properties of the support.

The present invention is directed precisely to the conformation of signs, signs or similar, in which the messages they contain are expressed in two ways: by graphic and / or written representation, and through relief, of so that the interpretation of texts and / or images can be done both visually and tactically.

For this purpose, the invention has been proposed as a main objective the fact of providing a process by means of which it is possible to form labels presenting the aforementioned characteristics, with an optimization of the means used and the results obtained. This objective has been fully achieved through the process that will be described in the following, whose main characteristics are set out in the characterizing part of claim 1
attached.

In essence, the process provides for the use of two separate and independent parts, of which one of them is the printed text / graphic support, and the other, which is a mesh formed by threads, is the one destined to retain between its threads a emulsion that will form a mold. The process provides for the superposition of both parts, so that both forms of writing (printed in the text, and the gaps after the hardening of the emulsion) They face each other and overlap. Subsequently, the necessary varnish passes, which, after removing the mesh, is has obtained the desired relief.

Brief description of the drawings

This and other features and advantages of the invention, will become more clearly apparent from the detailed description that follows in a preferred way of embodiment, given by way of illustration only and not limiting, with reference to the accompanying drawings, in the that:

Figure 1 represents a top view of the mesh (1), surrounded by metal frame (2)

Figure 2 represents a section of the elevation of mesh (1), in which the mold formed by the emulsion is observed (3), with the gaps (4).

And in figure 3 the final product is observed, a sign in which the black line represents the reliefs (5)  desired, being able to remain transparent or not.

Description of a preferred embodiment

As indicated above, the proposal of the present invention consists in the creation of labels in which the printed writing simultaneously intervenes conventional (either written or graphic) and its equivalent in high relief. For this, two parts are provided, of which the first it will constitute the label after being both treated according to the following process phases:

one)

 The First part, called a substrate, is a photoluminescent sign conventional (illustrative and not limiting), in which the message is represented graphically and / or in writing wanted;

2)

 The second part, called mesh, is determined by the thickness of the threads and the separation between them. These parameters determine the number of varnish passes that must be taken to that the necessary varnish be deposited for a given thickness and height of the high relief. It is convenient to clarify that the fact of reducing the number of passes considerably reduces process costs, so the choice of the parameters that define the mesh is It becomes a determining factor.

3)

 This mesh is surrounded by a metal frame, and on it is poured a emulsion not very sensitive and very dense. It is subsequently placed on she a negative with the images or text object of the relief. In this negative, said text or images is opaque to light ultraviolet, while the rest is transparent to said light.

4)

Subsequently the set is introduced in a vacuum chamber, so that the negative is achieved It is perfectly attached to the emulsion. In this camera you projects a light that, at a certain intensity and during a determined time, hardens the emulsion in those areas that reaches, that is, in those that are under the zones transparent of the negative, while in the areas under the opaque part, that is, the object text or image, remains as fluid

5)

Be remove the vacuum chamber assembly, releasing and withdrawing the negative (being reusable), and cleaned carefully the emulsion remains by means of pressurized water, bringing the mesh It is ready to be used as a mold.

6)

A once attached substrate and mesh, on the outer (front) side of the mesh are made a varnish pass through a squeegee, depositing said varnish on the substrate when passing through the gaps of the emulsion mold.

7)

Be remove the mesh, subjecting the substrate to a process of dried

8)

Be repeat steps 6 and 7 successively, until reaching High relief the desired height.

This mesh, with its emulsion mold, can be reused on new substrates, so the process for a second copy will start from point 6. This gives an idea of the economic advantages that the process provides according to the Production is higher.

It should be mentioned that, to obtain a result optimal, long and expensive studies have been carried out for each step of process:

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The ideal varnish has been sought, with the body necessary to minimize the number of passes (which  It implies cost reduction. After these studies, it has arrived to the conclusion that for this process the best varnish to use It is an especially dense overprint varnish, obtaining The following results for the height of the high relief: 0.35, 0.40, 0.45, 0.55, 0.60 and 0.65 mm for 1, 2, 3, 4, 5 and 6 passes respectively.

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On the other hand it has been investigated on the most appropriate emulsion, and the conclusion of that to obtain optimal results you must be unresponsive and very dense, concluding that it is a photo-emulsion  of a high viscosity component, especially suitable for very thick layers on open fabric for direct process of emulsified

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Depending on the emulsion, it has studied the time it takes to be exposed to light to that hardening occurs, obtaining that it is sufficient with values around 1000 steps (although this value will depend on each insolation machine).

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Finally, depending on the varnish and emulsion mesh is calculated, which is determined by the thickness of the threads and the separation between them. These parameters determine the amount of varnish and / or emulsion that is deposits on the substrate in each pass, so that at optimally sizing the mesh can reduce the number of past and therefore production costs. The conclusion obtained is that the ideal mesh that has 21 threads per cm2, these threads having a diameter of 140 microns.

It is not considered necessary to make the content of this description for a subject matter expert can understand its scope and the advantages derived from the invention, as well as develop and implement the object of the same.

However, it should be understood that the invention has been described according to a preferred embodiment thereof, so which may be subject to change without implying any alteration of the basis of said invention, and may affect such modifications, especially the shape, size and / or the materials of the parts used in the process.

Claims (1)

1. Label manufacturing process by means of a serigraphic technique for applying varnish to form reliefs in figures and letters that facilitate tactile reading in addition to the visual one, intended for the provision of signs / signs that can be read visually and / or tactically , which is characterized in that it comprises the phases of:

one)

Provide two parts intended for constitute the aforementioned label, of which a first part is a  conventional sign, photoluminescent or not, in which graphically or textually represents the desired message;

2)

Create the mesh - characterized by having its threads a diameter of 140 microns and a density of 21 threads per cm2 - and tension it and fix it to a metal frame;

3)

Pour the emulsion - characterized in that it is a photo-emulsion of a component of high viscosity and not very sensitive to light - on the mesh, then placing on it a negative that represents the text or image that you want to provide with relief;

4)

Project on the set -which remains inside a vacuum chamber - the necessary light during the appropriate exposure time - approximately 1000 steps, varying for each insolation machine- so that the emulsion hardens throughout the mesh except under the areas of the negative opaque to said light; after the hardening process, it remove the vacuum chamber assembly, remove the negative and clean the remains;

5)

Place the mesh on the label and apply the necessary passes with the varnish - characterized by being especially dense and offer as a result 0.35, 0.40, 0.45, 0.55, 0.60 and 0.65 mm high relief for 1, 2, 3, 4, 5 and 6 passes respectively - with their necessary intermediate drying times; this varnish will fill the holes in the emulsion mold;

6)

Definitely separate the mesh from substratum; on the one hand and after drying the product will be obtained final, and on the other hand after cleaning and drying you will get the Mesh with the emulsion mold ready to be reused.