Set Of Stick-Shaped Filters Made Of Cardboard, Preform For The Manufacture Thereof And Packaging Thereof

Abstract

The present invention relates in particular to a set (2) of filters (10) made of cardboard or cellulosic material. In particular, the set is characterised by the fact that it is in the shape of a generally cylindrical stick which is made up of a plurality of individual filters (10), each formed of a winding on itself of a side made of cardboard or cellulosic material, said filters (10) being arranged in extension of one another and being partially connected in pairs by connecting means (3), such that it is possible to separate at least one filter (10) from. tile stick by removing or severing tile connecting means (3).

Claims

1. A set of filters made of cardboard or cellulosic material, wherein said set has the shape of a generally cylindrical stick which consists of a plurality of individual filters, each consisting of a winding on itself of a blank of cardboard or cellulosic material, these said filters, disposed in the extension of each other, being partially connected in pairs by connecting means, such that it is possible to separate at least one of said filters from said stick by removing or severing said connecting means, and wherein said set comprises only a single sheet of cardboard or cellulosic material in which parallel cutouts which individualize said blanks are formed, each of the cutouts being partial that is to say there are, between said cutouts, bridges of material, forming said connecting means, which connect two of said neighboring blanks.

2. The set according to claim 1, wherein said bridges of material are positioned such that they are angularly equidistant at the periphery of each of said filter.

3. The set according to claim 1, wherein it comprises at least four bridges of material.

4. The set according claim 1, wherein it includes at least five filters.

5. The set according to claim 1, wherein it includes at most fifteen filters.

6. A preform for the manufacture of a set according to claim 1, which consists of a sheet of cardboard or cellulosic material in which parallel cutouts which individualize said blanks are formed, each of said cutouts being partial that is to say there are, between said cutouts, bridges of material which connect two neighboring blanks.

7. A packaging for a set according to claim 1, which consists of an envelope similar in shape to that of said stick, which includes pre-cutouts which are disposed in such a way that they extend facing the areas which separate the individual filters when a stick is present in said envelope.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other characteristics and advantages of the invention will become apparent upon reading the following description of one preferred embodiment of the invention. This description is made with reference to the appended drawings in which:

[0028] FIG. 1 is a left view of a cardboard filter which may form part of the set according to the present invention;

[0029] FIG. 2 is a right view of the same filter;

[0030] FIG. 3 is a perspective view of the filter of FIGS. 1 and 2;

[0031] FIG. 4 is a perspective view of another embodiment of this filter,

[0032] FIG. 5 is a perspective view of yet another embodiment of this filter;

[0033] FIG. 6 is a front view of a stick-shaped set, in accordance with the present invention;

[0034] FIG. 7 is a perspective view of the set of FIG. 6;

[0035] FIG. 8 is a first front view of the set of FIG. 6, representing an end filter being detached;

[0036] FIG. 9 is a second front view of the set of FIG. 6, representing an end filter being detached;

[0037] FIG. 10 is still a front view of the set of FIG. 6, the end filter being represented detached from the rest of the set;

[0038] FIG. 11 is a perspective and partial view of the filter and of the set of FIG. 10, intended more particularly to show the “bridges of material” which exist between two neighboring filters;

[0039] FIG. 12 is a top view of a “preform” which allows obtaining a set according to the invention;

[0040] FIG. 13 is a detail view of FIG. 12.

DETAILED DESCRIPTION OF THE INVENTION

[0041] Throughout the present application, including the claims, the terms “tip”, “filter” and “filter-tip” are used interchangeably to denote the same object.

[0042] As it is particularly visible, the appended FIGS. 6 and 7 deal, in accordance with the present invention, with a generally cylindrical stick-shaped set 2 which consists of a plurality of individual and identical filters 10, for example in accordance with one of the embodiments visible in FIGS. 3 to 5 mentioned above, each consisting of a winding on itself a cardboard blank.

[0043] These filters 10 are disposed in the extension of each other so as to thus constitute the stick.

[0044] The example represented here deal with a set 2 consisting of five filters. This number is absolutely not limiting. It would be possible to form sets including a different number of filters, preferably a greater number. As an indication, this number is less than or equal to 15, so as to constitute sets of reasonable size, compatible with the currently available packages.

[0045] In accordance with the invention, the filters 10 of the set 2 are connected in pairs by connecting means, so that it is possible to separate at least one filter 10 from said stick by removing or severing said connecting means.

[0046] According to the invention, these connecting means consist of “bridges” of material which connect two neighboring filters 2.

[0047] These bridges or “attachment points”, referenced 3, are particularly visible in FIG. 11. They form an integral part of the filters.

[0048] These bridges of material are sufficient to make the filters 10 secured to each other and to give some cohesion to the set 2.

[0049] However, these bridges 3 are not sufficiently resistant to oppose the separation of a filter 10 (see FIG. 10), after tilting of this filter 10 at an acute angle, as shown by the arrow f in FIG. 8. If necessary, this tilting movement can be continued until obtaining a larger angle, close to the right angle, as shown in FIG. 9.

[0050] The tilting forces the material of the filters, so that the bridges 3 break and burst. Thus, the filter 10 is detached from the other ones and is ready to be used. It should be noted that there is no residue or other material to throw away, because the bridges 3 form an integral part of the filters 10 and consist of the same material. In other words, any fraction of this set is usable. The fact that the bridges 3 form part of the filters makes the use of the set extremely easy and simplifies its manufacture.

[0051] If necessary, this titling movement can be combined with a slight pulling movement, once the user feels that the end filter 10 is about to separate from the set 2.

[0052] In a particularly advantageous manner, the bridges are distributed angularly equidistant at the periphery of each filter, so as to give uniform cohesion to the set and allow easy separation.

[0053] Of course, each time the user wishes to take a filter 10, he operates in the same way as described above.

[0054] To obtain such a set 2, a preform 4 such as the one represented in the appended FIG. 12 is preferably used.

[0055] This preform 4 consists of an elongated rectangular cardboard web, whose parallel long sides are referenced 40 and the short sides are referenced 41.

[0056] In this perform 4, five strips 5 whose long sides extend parallel to the short sides 41 of the preform 4 are individualized.

[0057] Each strip is separated from its neighbor (neighbors) by partial cutouts 6 which are separated by the aforementioned bridges of material 3.

[0058] The production of the pre-cutouts is preferably implemented using an automated machine which will not be described here because it does not constitute the core of the invention.

[0059] The preform 4 is then wound on itself in a manner similar to what is already produced and known for making individual filters. Here again, an automated machine is preferably used. As soon as the preform takes its final stick shape, a string of glue is placed in order to ensure the cohesion of this stick over time.

[0060] The preform 4 may optionally have additional pre-cutouts over part of its thickness, to facilitate the shaping of the filters, as explained in FR 3057441 mentioned above.

[0061] In addition to the aforementioned advantages related to the use of the aforementioned set 2, the manufacture of this set from a preform 4 allows rationalizing this operation.

[0062] The present invention also relates to packaging for such a set. This has not been represented in the figures so as not to weigh them down unnecessarily.

[0063] Such a packaging for a set 2 such as the one described above consists of an envelope of shape similar to that of said aforementioned stick. In other words, it also has a stick shape and is dimensioned to allow inserting a set therein, while enclosing it. This envelope includes pre-cutouts which are disposed in such a way that they extend facing the areas which separate the individual filters 10 when a stick is present in said envelope.

[0064] Advantageously, this packaging is transparent or translucent, so that the consumer can easily see the number of present filters. It is possible to envisage that the material which constitutes this packaging is the same as that of the transparent packaging of cigarette packets.

[0065] When the consumer wishes to take a filter from the packaging, with a single gesture, he will break one of the pre-cutouts of the packaging, as well as the pre-cutout facing the set 2.

[0066] In addition to the advantages already described relating to the present invention, it can be noted that it is extremely easy to transport a stick-shaped set (consisting for example of six filters), for mobile use without dispersing or losing said filters.

[0067] The consumer can successively take a filter, so that the stick is reduced but remains compact and in one piece.