HK1125983B - Security paper material, in particular for labelling and packaging, and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD

The present invention relates to a method for manufacturing a security paper material, in particular for labelling and packaging.

BACKGROUND ART

There are known various so-called security papers, i.e. provided with various artifices having the function of either avoiding or detecting a possible fraudulent copy or forgery; specifically, security papers provided with electronic chips capable of outputting an identification signal are known.

In the known security papers, the chips are applied onto a support, which is then glued or otherwise fixed onto the previously formed paper sheet.

This type of security paper is not free from drawbacks, both because the application of the chips is relatively complicated and costly, and because the chips cannot be appropriately anchored to the paper sheet underneath, and furthermore remain exposed on the surface of the paper sheet and are thus subject to possible damage, unless the chips are coated with a protective layer which however implies an increase of complexity and cost of the manufacturing process.

EP-A-1559832 , GB-A-2395724 and WO 03/015016 disclose methods for making security papers wherein the chips are carried by supporting threads and then released or otherwise applied onto the paper material during cylinder mould process for paper manufacturing.

DISCLOSURE OF INVENTION

It is an object of the present invention to provide a security paper material, of the type formed by a paper sheet with an electronic identification chip, which is free from the above-mentioned drawbacks of the known art; in particular, it is an object of the present invention to provide a security paper material which is relatively simple and cost-effective to manufacture and in which the chip is firmly and efficiently anchored to the paper sheet.

The invention relates to a manufacturing method of a security paper material, in particular for labelling and packaging,

According to a preferred embodiment, the method further comprises, after the step of introducing the chips into the paper sheet being formed, a step of coupling an auxiliary paper sheet to said paper sheet; the chips are applied onto an upper side of the paper sheet being formed, and the auxiliary paper sheet is coupled to said side.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further described in the following non-limitative example of embodiment, with reference to the accompanying drawings, in which:

• figure 1 is a diagrammatic longitudinal section view of a security paper material according to the invention;
• figure 2 is a diagrammatic view of a manufacturing system of the security paper material in figure 1 and illustrates the main steps of the manufacturing method of such material.

BEST MODE FOR CARRYING OUT THE INVENTION

With reference to figure 1, a security paper material, specifically for labelling and packaging, comprises a paper sheet 2 formed by a cellulose fibre matrix 3 and provided with at least one electronic chip 4 of known type, e.g. an active and/or passive RFID chip.

Chip 4 is at least partially embedded in paper sheet 2 (as shown by a solid line in the left part of figure 1) and, preferably, is entirely embedded in matrix 3 (as shown by a dotted line in the right part of figure 1).

Optionally, paper material 1 comprises an auxiliary paper sheet 5 coupled to paper sheet 2 and chip 4 is incorporated between auxiliary sheet 5 and paper sheet 2.

Paper material 1 is advantageously made, in accordance with a further aspect of the present invention, by the method described hereafter with reference to figure 2, which diagrammatically shows a manufacturing system 10 of paper material 1.

System 10 comprises a Fourdrinier type continuous papermaking machine 11, essentially known and not described in detail for the sake of simplicity. In general terms, papermaking machine 11 comprises a headbox 12 for feeding a wet cellulose fibre pulp to a flat forming table 13 having a formation fabric 14 on which the pulp is deposited; papermaking machine 11 further comprises a table roll 15 cooperating with forming fabric 14, a so-called "wet end" 16 and a dryer section 17. As known, the progressive subtraction of water from the wet pulp gradually transforms the pulp into a paper sheet. The paper sheet being formed is indicated by numeral 20 in figure 2 and will form, once dry, paper sheet 2 of above-described paper material 1.

After an initial part of forming table 13 near headbox 12, and downstream of table roll 15, there is arranged over forming table 13, a dispensing device 21 which deposits chips 4 on the pulp, at predetermined intervals both in the direction of advancement of the paper sheet 20 being formed and in transversal direction. Specifically, chips 4 are dropped by gravity onto the pulp carried by forming fabric 14 onto an upper side 22 of paper sheet being formed 20 and are at least partially embedded in the pulp.

Chips 4 are thus introduced into the paper sheet being formed 20 during the step of transforming the wet cellulose fibre pulp into paper.

Immediately downstream of dispensing device 21, a mechanism 25 carries auxiliary paper sheet 5 into contact with side 22 of paper sheet 20 being formed and makes the coupling of the latter with auxiliary paper sheet 5.

A wet rolling step follows, performed by means of a rolling assembly 28 arranged in wet part 16 and having for example two or more counterpoised pairs of rolls; the wet rolling of paper sheet 20 being formed with auxiliary paper sheet 5, the latter also still wet, ensures the adhesion of the two sheets.

The formation of paper sheet 2 and thus of paper material 1 is completed by passing through wet end 16 and drier section 17.

According to a variant, table roll 15 is absent from the papermaking machine 11 and dispensing device 21 is arranged on forming table 13 upstream of mechanism 25; indeed, the coupling with auxiliary paper sheet 5 makes the use of table roll 15 on forming table 13 unnecessary, as it is not required to improve the surface properties of the paper sheet 20 being formed (onto which auxiliary paper sheet 5 is placed).

According to a further variant, dispensing device 21 is arranged after the initial part of forming table 13 next to headbox 12 and upstream of table roll 15 instead of downstream of table roll 15, as shown by a dotted line in figure 2. Obviously, if table roll 15 is missing, dispensing device 21 is arranged on forming table 13 between headbox 12 and mechanism 25.

The advantages of the present invention are apparent from the description above.

The paper material of the invention allows a rapid, secure identification by querying the chip incorporated in the material itself.

The chips are perfectly incorporated and firmly fixed within the material, thus protected from possible damage.

Furthermore, the paper material of the invention is perfectly printable with the usual printing techniques offering high printing quality.

Moreover, the manufacturing method is simple and cost-effective, specifically as the introduction of the chips is performed directly during the manufacturing step of the paper material.

Claims (3)

1. A manufacturing method of a security paper material, in particular for labelling and packaging, comprising the steps of forming a paper sheet from a wet cellulose fibre pulp and providing the paper sheet with electronic chips; the chips being introduced into the paper sheet being formed during the transformation step of the pulp into paper, the chips being deposited directly onto the wet pulp and at least partially embedded in the pulp; the method being characterised by comprising the steps of: feeding the wet cellulose fibre pulp to a Fourdrinier type continuous papermaking machine, depositing the pulp on a forming table; and forming a sheet of paper by gradually subtracting water from the pulp; the chips being deposited in the pulp directly onto the forming table on an upper side of the paper sheet being formed and being fed by a dispensing device arranged over the forming table and being dropped by gravity onto the pulp; wherein the chips are deposited on the pulp by the dispensing device at predetermined intervals both in the direction of advancement of the paper sheet being formed and in transversal direction.
2. A method according to claim 1, characterised by comprising, after the step of introducing the chips into the paper sheet being formed, a step of coupling an auxiliary paper sheet to said paper sheet.
3. A method according to claim 2, characterised in that the chips are applied onto an upper side of the paper sheet being formed and the auxiliary paper sheet is coupled to said side.