FR2790708A1 - Method for manufacturing self-adhesive multi-flaps label includes positioning of adhesive cover leaf on intermediate leaf, and partial neutralization of adhesive on cover leaf sticking on base leaf - Google Patents

Abstract

Label has base leaf (1) covered by self-adhesive layer (18) protected by anti-adhesive support (2), intermediate leaf (5), smaller than base leaf, and cover leaf (6) covered by adhesive layer (19). Intermediate leaf is placed on base leaf and has margins (3, 4) on either side. Adhesive on margin (13) of cover leaf is provisionally partially neutralized, sticking on margin (4) of base leaf. Cover leaf is finally glued on margins (3, 4) and on intermediate leaf with margin (3) defining binding. An Independent claim is also included for the description of the multi-flaps label.

Description

- 1 -

  The present invention relates to a method for manufacturing multi-label

  shutters, which can be self-adhesive.

  Labels of this type have already been produced comprising a label sheet having an adhesive layer which may be protected before being deposited by a non-stick support. On the label, one or more additional flaps are reported, including a cover sheet, produced by several sheets or by folding a single larger sheet. The cover sheet and the label sheet being larger on at least one of the sides in order to constitute a margin where they are

  glued to each other so as to maintain the inner sheets.

  The manufacture of such a label requires a step of applying a layer of adhesive on at least one margin of the label between the label sheet and the

cover sheet.

  Furthermore, if it is desired that the flaps be kept in the folded position, it is also necessary to provide at least one additional step.

  applying a strip of glue on another margin of the label.

  It turns out that the sizing treatments are rather delicate to carry out and

  require expensive special equipment.

  -2- In addition, to be able to open the label and access the different parts of the label, the adhesive used must be removable, or else provision must also be made to make a line of perforations which can be torn to open the label,

  this opening then being final.

  It turns out that these different solutions are complex to implement, and involve sizing treatments which are rather delicate to carry out, which require expensive equipment, and lead to production rates.

  weaker. This results in relatively high manufacturing costs.

  The present invention aims to eliminate these drawbacks. To this end, it proposes a method for the manufacture of labels comprising several flaps, this method comprising the deposition on a basic sheet, of at least one intermediate sheet which is narrower than the basic sheet, so as to leave at least two opposite margins of the base sheet, not covered by the intermediate sheet. According to the invention, this method is characterized in that it further comprises - applying the adhesive face of a cover sheet provided with a layer of self-adhesive adhesive on the intermediate sheet and the uncoated margins of the base sheet, and - the partial partial neutralization of the adhesive on the margin of the cover sheet, coming to stick on one of the two non-covered margins of the

basic sheet.

  Thanks to these arrangements, the intermediate sheet is fixed to the base sheet by means of the adhesive cover sheet along two opposite edges. The method according to the invention thus makes it possible to obtain a label comprising at least three printable faces, namely the upper face of the base sheet, the lower face of the intermediate sheet and the upper face of the label thus

  obtained, without involving a gluing step.

  To open the label, simply lift the margin of the partially neutralized cover sheet, the other margin of the cover sheet which remains stuck to the basic sheet constituting a binding margin of the multi-fold label

thus carried out.

  As the glue of the margin of the cover sheet that we are lifting is partially neutralized, we can stick it back on the basic sheet to close the label. Advantageously, the basic sheet is a prefabricated label sheet, provided

  a layer of self-adhesive adhesive, covered by a protective

  adhesive that can be removed to stick the label on another support. In this regard, it should be noted that the quality of keeping the label thus obtained in a closed state does not depend on the nature of the material on which the label is affixed. According to a feature of the invention, the intermediate sheet is a multi-part sheet with several parts folded over each other or a booklet,

  so as to obtain an even larger printable surface.

  According to another feature of the invention, the partial neutralization of the adhesive

  of the margin of the cover sheet is obtained by applying an anti-

  adhesive on the corresponding margin of the basic sheet.

  It turns out that such a non-stick material, for example a varnish, can be

  easily applied, in particular by a conventional printing technique.

  In this way, the opening of the label can be carried out several times without significant damage to the layer of adhesive on the unglued margins of the cover sheet. Alternatively, the cover sheet is a prefabricated label sheet, provided with a layer of self-adhesive adhesive, covered by a non-stick protective support, the partial neutralization of the adhesive from the margin of the sheet.

  cover being obtained by leaving a strip of this anti-protection support

  adhesive, this strip being situated directly above the corresponding edge of the intermediate sheet and covering part of the margin of the cover sheet, at a

  some distance from the edge of the cover sheet.

  Such a label can be opened by tearing off the strip. Alternatively, a precut line can be provided in the cover sheet along the edge of the non-stick strip, on the side of the edge of the cover sheet. In this way, if this strip is pulled, the cover sheet is torn only along the pre-cut line, the strip remaining stuck to the part of the cover sheet which is lifted. The label can then be closed by at least partially removing the strip, which releases an adhesive portion of the cover sheet. To this end, provision may also be made to coat the area -4- of the base sheet opposite the strip of non-stick material, or to make transverse cuts in the strip, so as to allow the removal of a part of the strip, and thus to release a part of the self-adhesive surface of the strip, each time that it is desired to close the label. This label can thus be closed several times. Provision may be made for the intermediate sheet to have dimensions smaller than those of the base sheet so as to leave all the margins of the latter not covered. In this case, the adhesive on the margins of the cover sheet is partially neutralized, except on a margin serving as binding of the intermediate sheet. According to another feature of the invention, the cover sheet is transparent. In this case, all sides of the intermediate sheet can be printed. It is thus possible to limit the elements to be printed on the label to a single sheet, possibly with several flaps folded over one another, which considerably simplifies the production of printed labels such as

advertising labels.

  It turns out that this process is perfectly suited to mass production

of multi-fold labels.

  The invention also relates to a multi-part label obtained by this method. An embodiment of a label obtained by the method according to the invention will be described below, by way of nonlimiting example, with reference to the appended drawings in which: FIG. 1 represents an exploded profile view of a label according to the invention; Figures 2 and 3 show in front view two variants of the label shown in Figure 1; FIG. 4 represents an exploded profile view of another embodiment of a label according to the invention; FIGS. 5 and 6 respectively show in profile views the label of FIG. 4, respectively in the closed position and once open; Figures 7 and 8 show in front view, two preferred embodiments of the label of Figure 4; Figures 9 and 10 show schematically two variants of devices for mass production

of labels according to the invention.

  Figures 1 to 3 show a multi-fold self-adhesive label, stuck with a

  removably on a non-stick protective support 2.

  This label is obtained from the following elements: - a basic sheet 1 which can be simple or consisting of a prefabricated self-adhesive label, coated with a layer of self-adhesive adhesive 18, protected by a non-stick support 2, - at at least one intermediate sheet 5, simple or with several flaps, preferably previously printed, and having in the folded state a width less than that of the basic sheet, and a cover sheet 6 coated with a layer of adhesive 19, and having the same

  dimensions than the basic sheet 1.

  It is manufactured by the following operations - the provision on the basic sheet 1 of at least one intermediate sheet 5, the intermediate sheet having a width less than that of the basic sheet 1 so as to leave uncovered at least two lateral margins opposite 3 and 4 of the base sheet, - the partial partial neutralization of the adhesive of the margin 13 of the cover sheet 6 which is bonded to one 4 of the two margins 3, 4 not covered by the base sheet 1, and - gluing the adhesive cover sheet 6 to the margins 3, 4 of the

  base 1 and on the intermediate sheet 5, the margin 3 forming a binding.

-6-

  The intermediate sheet 5 can be produced from a sheet folded over it.

  even to form several strands. It can also take the form of a booklet

  several single or double pages joined together by a binding.

  According to a first preferred embodiment of the label according to the invention, the partial neutralization of the adhesive on the margin 13 of the cover sheet 6 is obtained by applying a non-stick material 11, such as a varnish, to the margin 4 of the base sheet 1. In this way the adhesive of the cover sheet 6 adheres to the margin 4 of the base sheet, and can both be peeled off without

notable deterioration.

  The intermediate sheet 5 can have the same length as that of the

  base 1 or cover sheet, as shown in Figure 2.

  However, to further improve the resistance to closure of the label, the intermediate sheet 5 ′ may have a length less than that of the base sheet 1 as shown in FIG. 3, so that upper and lower margins 4 'of the base sheet are not covered by the intermediate sheet. In this case, the non-stick material 11 must also be applied to the margins 4, 4 ′ of the base sheet 1, with the exception of the assembly of

the binding margin 3.

  In this way, to open the label, it is easy to peel off all of the margins 13, 13 'of the cover sheet 6, glued to the margins 4, 4' coated with

  non-stick material, and then glue them together to close the label.

  A part 8, preferably in an angle of the margin 13 of the cover sheet 6, can serve as a tab intended to facilitate the detachment of the margin 4 and thus the opening of the label and access to the intermediate sheet 5 , 5 '. For this purpose, the glue covering the underside of this part 8 can be completely

  neutralized, for example by removing it.

  In FIGS. 4 to 8, the adhesive of the margin 13 of the cover sheet 6 is partially neutralized by a strip 7 covering all of this margin 13 with the exception of a narrow strip 9 along the adjacent edge of the cover sheet. This strip 7 can advantageously come from a non-stick backing sheet which protected the adhesive face of the cover sheet before it is placed on the label, the cover sheet coming from a label.

prefabricated sticker.

  -7- This strip 7, with the cover sheet, may comprise an extension extending beyond the edge of the base sheet 1, to form a tab 12 which

  facilitates gripping of the strip 7 with a view to detaching it (FIG. 7).

  Such a label can be opened in two ways, either by tearing off the strip 7 situated directly above the edge of the intermediate sheet 5, or by providing a precut line, produced along the outer edge of the strip 7, on the side of the margin 9, as shown in FIGS. 7 and 8. In the latter case, after opening the label, the margin 9 of the cover sheet remains stuck on the base sheet 1, while the strip 7 remains stuck on the part of the

  cover glued to the upper flap of the intermediate sheet 5.

  The pre-cut line can also be made so as to perforate both the cover sheet 6 and the strip 7. In this case, after opening the label, only part of the strip 7 remains stuck to the cover sheet. 6,

  while the other part of this strip remains maintained on the base sheet 1.

  As an alternative to tab 12, one can provide, as shown in FIG. 8, a tab 12 ′ of substantially triangular shape produced both in the cover sheet 6 and the intermediate sheet 5 (in all the thicknesses of this sheet) , and possibly in the basic sheet 1, this tab having an edge located directly above the outer edge 10 of the strip 7. Thanks to its thickness, such a

  tab can easily be entered, making it easy to open the label.

  To close the label, the strip 7 can be totally or partially removed, which releases part of the adhesive surface of the cover sheet, which can

  be glued to the upper side of base sheet 1.

  To allow several manipulations of opening and closing of the label, provision may be made to coat with a non-stick material, the area of the upper face of the base sheet, located opposite the strip 7. Alternatively, it is possible to provide in the strip 7 several lines of transverse cuts, so as to facilitate a partial removal of the strip each time that it is desired

close the label.

  The cover sheet 6, as well as the strip 7 are advantageously made of a transparent material. In this case, only the intermediate sheet 5 can be previously printed on all of its faces, and possibly the sheet

basic 1.

  -8- Of course, the principle of the non-stick strip 7, as described with reference to FIGS. 4 to 8, can be applied to a label similar to that shown in FIG. 3. It then suffices to provide an anti-strip -adhesive that extends to the

  times along the margin 13 and the margins 13 'of the cover sheet 6.

  According to another feature of the invention, the basic sheet comprises two layers linked together by a so-called "fugitive" or "peelable" adhesive which has the particularity of allowing the final separation of the two layers without deterioration thereof and without leave a noticeable trace of glue. In this way, the intermediate sheet 5, possibly multi-flap can be detached

  of the product on which the label according to the invention is stuck.

  Provision may be made for the lower layer of the base sheet 1 to be transparent, so as to be barely visible on the product when the other layers of the label

have been withdrawn.

  Such a "fugitive" adhesive can be applied by a simple printing technique,

  replacing the ink with the "fugitive" adhesive in fluid form.

  The previously described label is perfectly suited to mass production as illustrated in FIGS. 8 and 9. In FIG. 8, this manufacture implements: a station 21 for distributing a base band 33, which can be self-adhesive and protected by a support strip 34 coated with a non-stick material, - a distribution and dispensing station 25 of single or multi-flap intermediate sheets 5 which can be previously printed, on the base strip 33, - a station 37 for coating areas of the base strip 33, located directly above the sheets 5, with a non-stick material, - a dispensing station 22 for an adhesive cover strip 27, - a compression station 36 for bonding the cover strip 35 to the entire base strip 33 and the sheets 5, - a cutting station 29 for the cover strip 35 and the base strip 33 along the edges of the labels to be produced , in order to form a series of labels uettes -9- multi-flaps, and - an extraction station 30 to remove from the support strip 34, the cut parts of the cover strip 35 and the base strip 33, between the labels thus produced, the support strip 34 on which are produced the labels being wound up by a station 32, while the extracted parts are

wound by a post 31.

  Alternatively, in FIG. 9, the adhesive cover strip is coated with a non-stick protective strip 26, the manufacturing device further comprising: a strip cutting station 7 in the non-stick protective strip 26 - an extraction station 28 of the protective strip 26, with the exception of the strips

  cut 7, followed by a winding station 23 of the strip 26.

  Of course, the deposition of the sheets 5 can also be carried out on the strip of

  cover 27, before the base strip 33 is bonded to the cover strip.

  This device can also include a coating station 37 as shown in FIG. 8, and a precut station 38 for making a precut line plumb with the edge of the strips 7 of protective support 26 left on the cover strip. 27, to facilitate the first opening of the labels

thus carried out.

  As mentioned previously, the base band 33 can be coated with a

  additional layer linked to the base band by a layer of "fugitive" adhesive.

  In this case, it suffices to provide, upstream of the station 25 for depositing the intermediate sheets 5, a printing station which applies the "fugitive" adhesive on the upper face of the base strip, and a station for applying a strip of paper to the fugitive adhesive. Of course, the "fugitive" adhesive can also be applied to the

  strip of paper instead of the base strip.

- 10-

Claims (21)

  1. Method for the manufacture of labels comprising several flaps, this method comprising depositing on a first basic sheet (1), at least one intermediate sheet (5) comprising one or more flaps narrower than the basic sheet , so as to leave at least two opposite margins (3, 4) of the base sheet, not covered by the intermediate sheet, characterized in that it further comprises: applying the adhesive face of a cover sheet (6) provided with a layer of adhesive (19), on the intermediate sheet (5) and the margins (3, 4) not covered with the base sheet (1), and - the partial neutralization of the adhesive beforehand on the margin (13) of the cover sheet (6), adhering to one (4) of the two margins (3, 4) not   covered with the basic sheet (1).   2. Method according to claim 1, characterized in that the basic sheet (1) is a prefabricated label sheet, provided with a layer of self-adhesive adhesive (18), covered by a support of non-stick protection (2).   3. Method according to claim 1 or 2, characterized in that the base sheet (1) is covered with a fugitive adhesive, on which an intermediate layer is applied, so as to allow the separation of the intermediate layer on which are attached the intermediate sheet (5) and the cover sheet (6), without risk of damaging the base sheet or the intermediate layer, and without leaving any perceptible adhesive trace.   4. Method according to one of the preceding claims,   characterized in that the intermediate sheet (5) is a multi-part sheet with   several shutters folded over each other, or a booklet.   5. Method according to one of the preceding claims,   characterized in that the partial neutralization of the adhesive (19) of the margin (13) of the cover sheet (6) is obtained by applying a non-stick material   on the corresponding margin (4) of the basic sheet (1).   6. Method according to one of claims 1 to 4, - 11 -   characterized in that the cover sheet (6) comes from a prefabricated label sheet, provided with a layer of self-adhesive adhesive (19), covered by a non-stick protective support, the partial neutralization of the adhesive the margin (13) of the cover sheet (6) being obtained by leaving a strip (7) of this non-stick protective support, this strip being located directly above the corresponding edge of the intermediate sheet (5) and covering a part of the margin (13) of the cover sheet (6), at a certain distance from the edge of the cover sheet.   7. Method according to one of the preceding claims,   characterized in that the intermediate sheet (5) has dimensions smaller than those of the base sheet (1) so as to leave uncovered all the margins (3, 4, 4 ') thereof, the adhesive (19 ) on the margins of the cover sheet (6) being partially neutralized, except on a margin (3) serving as   binding of the intermediate sheet (5).   8. A method for the serial production of labels comprising several flaps, this method comprising depositing (25) on a base strip (33), sheets (5) with one or more flaps narrower than the base strip, so as to leave areas of the base strip, not covered by the sheets (5), characterized in that it further comprises - the bonding (36) of an adhesive cover strip (27) on the strip of base (33) and on the sheets (5) arranged thereon, - the partial neutralization (24, 37) prior to the adhesive on areas (13) of the cover strip (27), coming to stick to the areas not covered by the base strip (33) - the production (29) of a cutting line in the cover strip (35) and in the base strip (33), all around the sheets (5), so as to form labels having at least two opposite margins (3, 4) around the sheets (5).   9. Method according to claim 8, characterized in that it further comprises the extraction (30) of the parts of the strip   base (33) and the cover strip (27) around the labels.   10. Method according to claim 8 or 9, characterized in that the partial neutralization step comprises coating (37) - 12 -   corresponding areas of the base strip with non-stick material.   11. Method according to one of claims 8 to 10,   characterized in that the cover strip (27) comes from an adhesive strip, the adhesive face of which is coated with a non-stick strip (26),   the partial neutralization step comprising the cut (24) in the anti-strip   tape (26) adhesive (7) partially covering the areas of the tape   cover (27) whose adhesive is to be neutralized.   12. Multi-flap label comprising a first basic sheet (1), and an intermediate sheet (5) disposed on the basic sheet (1), this sheet comprising one or more flaps which are narrower than the basic sheet so as to leave two opposite margins (3, 4) of the base sheet, not covered by an intermediate sheet, characterized in that it further comprises a cover sheet (6) provided with a layer of adhesive (19) bonded to the intermediate sheet (5) and on the margins (3, 4) not covered with the basic sheet (1), the layer of adhesive covering one of the two margins (3, 4) being neutralized beforehand   partially so as to allow the label to be opened.   13. Label according to claim 12, characterized in that the basic sheet (1) is a prefabricated label sheet, provided with a layer of self-adhesive adhesive, covered by a protective support. non-stick (2).   14. Label according to claim 13, characterized in that the cover sheet (6) is transparent, and the sheet   intermediate is printed on all sides.   15. Label according to one of claims 12 to 14,   characterized in that the intermediate sheet (5) is produced from a sheet folded in on itself.   16. Label according to one of claims 12 to 13,   characterized in that the intermediate sheet (5) consists of several   single or double sheets assembled by a binding.   17. Label according to one of claims 12 to 16, - 13 -   characterized in that the margin (4) of the base sheet is coated with a non-stick material.   18. Label according to one of claims 12 to 17,   characterized in that the margin (13) of the cover sheet (6) is entirely covered with a non-stick strip (7) with the exception of a narrow strip (9) the   along the adjacent edge of the cover sheet.   19. Label according to claim 18, characterized in that it comprises a pre-cut line made in the cover sheet (6) either directly above the strip (7) on the edge side (10)   adjacent to the label, also in the strip (7).   20. Label according to claim 19, characterized in that it comprises a tab (12 ') formed in the cover sheet (6) and in the intermediate sheet, and having an edge located at   plumb with the precut line.   21. Label according to one of claims 12 to 20,   characterized in that the basic sheet (1) comprises two layers linked together by a so-called "fugitive" adhesive which has the particularity of allowing the final separation of the two layers without deterioration thereof and without leaving a perceptible trace of glue