OBJECT OF THE INVENTION
The present invention refers to a label, of the kind
of ones used for attaching by any means to products for
their sale, and which includes a safety element with the
purpose of preventing the robbery of the product to which
the label is associated, with the said safety element being
of the type of those known in the field of electronics as a
"radio-frequency tag". The invention includes, as well as
the label itself, a device for its manufacture.
BACKGROUND TO THE INVENTION
Conventional labels are made up by a portion of
cardboard generally printed on both sides and which do not
include any safety element aimed at preventing the robbery
of the product onto which they are to be placed.
These labels are obtained using a strip of cardboard
passing through a rotating machine in which the two sides
of the strip are printed. These prints shall remain
positioned on the right and on the back of the label, once
the printed strip has been suitably cut.
This means of obtaining the labels poses a series of
problems, such as the need to use a cardboard with a high
grammage so as to obtain a label with a certain rigidity,
or the impossibility of printing on both sides of the strip
all the colours available in the printing machine vats;
this is due to the fact that first the printing for one
side of the strip is carried out, printing it with the
colours available in the initial vats of the printing
machine and subsequently the said strip is turned around
using rollers, printing the colours from the remaining vats
on the other side.
At the present time there are some safety elements on
the market whose purpose, as regards the protection of
products, is similar to the label that is the object of the
invention; these elements are designed to be attached to
the products to be sold and may be detected remotely by a
receiver device, thereby activating an alarm when someone
attempts to remove the product from the establishment
unless the safety element has been deactivated by means of
a specific piece of equipment. Amongst the said elements we
should highlight the ones used in the large department
stores, which are made up by two parts that are anchored to
the product and which are removed at the time payment is
made and the radio-frequency tags.
These radio-frequency tags are widely spread and at
the present time they are attached to the product using a
self-adhesive label in such a way that they are hidden
between the label and the product, or they are introduced
into the package container for the product; in either case,
it is necessary to manually add the radio-frequency tag to
the products that you want to protect, and they are easily
located by any possible thief, which allows him to choose
the products that do not incorporate this element.
DESCRIPTION OF THE INVENTION
The label in this invention has the specific
characteristic of including a radio-frequency tag placed
between two sheets of cardboard with equal external
profiles that are stuck along the edges opposite one
another, shaped into a single body; the two strips of
cardboard are printed on the outer side, whereby the label
in the invention, which includes the aforesaid tag, has a
look just like a conventional label and it is attached to
the product in a similar way to the latter.
This label provides some big advantages determined by
the fact of having an in-built radio-frequency tag; one of
these advantages is the fact that when the product is
labelled the radio-frequency tag is already associated to
the product in question, whereas at the present time the
labelling and the incorporation of the tag to the product
are carried out in two different and totally independent
operations.
Another of the advantages of this label is that the
tag, since its thickness is very low and since it fits
between the two sheets of cardboard it is not easily
detectable by any possible thief.
The invention envisages, for the manufacture of the
label, the use of a device made up by a rotating label
printing machine, fitted with specific accessories that may
be removed from the former when they are not manufacturing
this type of labels, with the printing machine then working
in the conventional manner.
It should be pointed out that the object of the
invention, apart from the label itself, is concentrated on
the accessories mentioned above, since the rotary printing
machine could be any of those existing on the market that,
regardless of the technology used to perform the said
printing (typography, flexography, silk screen printing,
offset, etc.), it will allow it to perform parallel prints
on one of the sides of a continuous strip which remain
symmetrically positioned as regards the middle line of the
strip.
In accordance with the invention, the accessories to
be positioned on the rotary printing machine are the
following: a) a guiding and marking mechanism for the
strip, which includes a roller over which the already
printed strip is guided and a ruler which acts against the
central part of the strip making a lengthways notch in it,
b) a labelling machine that positions the self-adhesive
radio-frequency tags onto the non-printed surface of the
strip and onto the areas opposite each other with one of
the parallel prints made on the other side of the strip, c)
a glue dispenser that applies a layer of adhesive product
over one of the halves of the non-printed side of the
strip, d) a guide for folding the strip, made up by two
parallel rollers set out in a noticeably perpendicular
direction to the advance movement of the strip and which
make the former fold along the longitudinal notch, in such
a way that the two halves of the non-printed side remain
opposite one another and e) pressure rollers that press the
previously folded strip thereby achieving the final
sticking of the opposite sides.
These accessories are attached to the printing machine
between the printing and stamping or final adjustment
areas, in such a way that the printed strip can pass
through all of them, thereby obtaining a number of labels
fitted with the corresponding radio-frequency tag and
between which there remains a small separation.
In the stamping and final adjustment area, which is
usual in rotary printing machines, the excess material is
sliced off from the sides of the labels, including the
fold, and some cross notch cuts are made in the
intermediate separations which make it easier to separate
the labels later and some stamped marks. These marks allow
the individual detection of the labels by the other
machines currently used, such as reprinters or guillotines,
so that the latter may, respectively, print variable
information (price, type of currency, use by dates, etc.)
in a certain area of the labels, or to perform precise cuts
in order to achieve their total separation, thereby handing
them over one by one.
The addition of the aforementioned accessories to a
conventional rotary printing machine, for the manufacture
of the safety label, provides important advantages, such as
the possibility of using a cardboard with a much smaller
substance than those used in the manufacture of
conventional labels, since, when carrying out the crosswise
folding of the strip, the labels obtained will have double
the thickness than that of the initial strip.
Another of the advantages determined by the use of
these accessories is that both the front and the back of
the label are printed simultaneously on the same side of
the strip of cardboard, which allows all the colours
available in the machine to be used for both prints.
The accessories mentioned allow the simultaneous
manufacture of two or more series of labels to be
performed, thereby increasing productivity and providing
that the necessary band width is accepted by the rotary
printing machine; in this case, the rotary machine must
simultaneously print the fronts and the sides on the backs
of the labels to be produced, in such a way that when the
strip is folded by the central area, the said prints shall
remain in areas that coincide with one another and by the
outer sides of the labels, with it also being necessary to
include a number of labelling machines in parallel equal to
that of the series of labels to be manufactured, so that
they will all have the corresponding radio-frequency tags.
DESCRIPTION OF THE DRAWINGS
In order to complete the description that is being
made and so as to help towards a better understanding of
the characteristics of the invention, the present
descriptive report comes with a set of non limiting
drawings which are an integrated part thereof, in which for
illustration purposes only, the following has been shown:
- Figure 1, a perspective view of the safety label.
- Figure 2, a elevation view of the label, with a
scaled cross-section of parallel stretches, in which the
different elements that form it may be seen.
- Figure 3, a perspective view of the accessories that
are mounted onto the printing machine and of a strip of
printed cardboard passing through them.
PREFERRED EMBODIMENT OF THE INVENTION
As may be observed in the referred Figures, the label,
shown in Figures 1 and 2, includes a radio-frequency tag
(1) placed between two sheets of cardboard (2a and 2b)
which form the front and the back of the label and which
are attached by the opposing sides by means of a layer of
adhesive (3), in such a way that the tag (1) and the sheets
(2a and 2b) form a single body.
As is seen in Figure 2, the tag (1) has a smaller
surface area than the sheets of cardboard (2a and 2b),
thereby remaining totally hidden between them.
The sheets (2a and 2b) are obtained from a strip of
cardboard (2) provided with two prints (4a and 4b) that
remain positioned, respectively, at the front and at the
back of the label when the latter is shaped.
The prints (4a and 4b) are carried out in a rotary
printing machine (5) of which, since it is a conventional
one, only the area of the frame has been shown over which
the accessories are attached that are necessary for
producing the labels.
These accessories are mounted onto the machine (5),
below the printing area, in such a way that the strip (2)
is printed before passing through the former.
These accessories are: a mechanism (6) for guiding and
marking the strip (2), a labelling machine (7), an adhesive
dispenser (8), a folding guide (9) for the strip (2) and
roller presses (10).
The mechanism (6) for guiding and marking includes a
roller (6a), over which the printed strip (2) is guided,
and a ruler (6b) which acts against the central area of the
strip (2) thereby making a lengthways line of holes in it
(2c).
The labelling machine (7) is the one in charge of
positioning the successive radio-frequency tags (1) over
the non-printed side of the strip, in such a way that they
remain centred with respect to each one of the prints (4a).
The tags (1) are initially stuck to a supporting coil
(7a) from which they are separated when the support passes
through a dispensing edge (7b) included in the machine (7).
The glue dispenser (8) has an applicator nozzle (8a)
which drops the adhesive layer (3) onto one of the halves
of the non-printed side of the strip of cardboard (2).
The folding guide (9) includes two rollers (9a) set
out in a direction that is noticeably perpendicular to the
advance of the strip of cardboard (2) thereby causing its
folding along the longitudinal line of holes (2c), in such
a way that both halves of the non-printed side are kept
opposite one another thereby holding the tags (1) in place.
The pressure roller (10) press down the two halves of
the previously folded strip, thereby achieving the final
ticking of the latter through the adhesive layer (3),
whereby a single strip of material (11) is achieved, with a
width equal to half the initial strip (2) and along which a
series of labels are interspersed.
This strip (11) will finally pass through a series of
conventional elements, not shown in the Figures, such as a
stamping machine in which the labels shall be partially
separated and some holes (2e) shall be made for hooking the
labels to the products and some stamped marks (2d) which
will allow the detection of each one of the labels by other
machines, such as the reprinters, guillotines, etc.
It is not deemed necessary to extend this description
any further so that any expert on the subject may
understand the scope of the invention and the advantages
that arise therefrom.
The terms in which this reports has been written up
must be taken always in their widest sense and not as being
limited.
The materials, shape, size and layout of the elements
may undergo alteration providing that does not mean any
change to the essential characteristics of the invention,
which are claimed below.