Use of a re-usable contact adhesive

Abstract: The use of a re-usable contact adhesive or gum strip (1) is based on the attachment of the latter on a briston board (2) or similar laminate, to form a binding folder for any type of documents, prior insertion and pressing of those documents or sheets (4) to bind them against the spine which constitutes the surface of the adhesive or contact gum strip. These bound sheets or documents may be freed and reattached as many times as desired, without the intersention of mechanical elements, or damage to the documents. The binding system which defines the new referred use, provides great cold adhesion strength, versus the traditional systems which require heat fusion gums which have been previously heated by means of a machine or apparatus.

Description: OBJECT OF THE INVENTION The invention refers to a new use of re-usable contact adhesives to achieve a binding of documents in a practically instantaneous manner, as well as the obtained folder. This use of the re-usable contact adhesive allow the obtention of binding folders only with the application of a contact adhesive strip on a bristol board or similar laminate body. BACKGROUND OF THE INVENTION Up to the present, re-usable contact adhesives, specifically within the stationary field, are exclusively used for a specific type of adhesive labels and for specific types of envelopes which permit their being opened for inspection of their contents, after which the envelope is reclosed. DE-A-4 125 661 discloses a strip of re-usable adhesive. The present systems of construction of folders, independently from the mechanical solutions based on staples, rings, fittings, etc., use heat fusion gums which require the availability of a machine by means of which the heating of the gum is carried out, which provokes a series of problems and disadvantages among which may be mentioned as most important, the slowness of the binding process, since the machine for heating the gum requires a specific time which is by no means quick. The adquisition of the machine for carrying out the heating involves cost and consequently, inversion and maintenance expenses. DESCRIPTION OF THE INVENTION The object of the invention is to give the re-usable contact adhesives a new practical use, based on which binding of documents in a rapid, simple, clean and economical manner is achieved, without using tools, mechanical elements or heat fusion gums, being based on the other hand on the disposition of a contact adhesive strip on what may be considered as the spine of a folder formed by a simple bended bristol board by a transversal and central line, in such a way that attaching, by means of heating, a contact adhesive strip on this spine, a folder is obtained which permits the binding of any type of documents, only with the introduction of these and pressing them against the strip which is going to constitute the internal surface of the folder spine which is thus obtained, remaining, these documents, perfectly binded with the possibility of being freed for other uses, without any type of problems. The gum or contact adhesive strip attached on the folder spine offers a smooth and continuous surface which ensures perfect adhesion of the edges of the sheets or documents throughout all its length. There is no need to say that when reference is made to documents, these will include sheets, magazines, journals, books, etc., and when mentioning the application of this gum or adhesive strip on the bended bristol board in order to form the folder, mention is also being made to any type of bristol board or laminate, bended or even unbended, since it will only be necessary to put the documents to be bound in contact, through their corresponding edge, with the said strip, so they remain suitable attached, with the possibility of being freed as many times as required, constituting, in short, a cold binding means, since no type of heating is required to achieve the attachment of the documents, though the application or attachment of the gum or contact adhesive strip requires a specific heating of the product for its correct attachment to the bristol board or folder. There is no need to say that the said strip may be of reduced width for binding a minimum number of sheets, or may reach a considerable width for binding numerous documents or sheets and even form thick volumes. The field of application is very wide, since from the binding of official documents, both in tribunal courts as in ministries, etc., passing through educational centers, the managerial world and even at personal levels, it is possible that the binded or folder documents by means ot the new use of the re-usable contact adhesives allows the power of having available, after their corresponding independization, of isolated documents, to be replaced by others, to obtain copies of the same, etc., being able to be rebinded in the same place, only by placing its corresponding edge in contact with the gum strip which forms the adherent means. The central gum or contact adhesive strip may sometimes be complemented with two lateral strips as help for a better backing to the first and last sheets, being very useful, especially in thick volume folders, which, when opened by its center may displace these sheets at the ends. The commercialization of the folders is carried out by means of the protection of the gum or adhesive strip by means of a siliconed paper to avoid the contact with other folders or documents, when they are grouped up, in such a manner that at the moment of use of the folder, said siliconed paper is removed, leaving the actual strip on which the actual documents are to be attached by adherence, free. The possibility also exists of commercializing the product, in other words, the adhesive or gum strip, already laminated between two silicone papers, with prefixed commercial widths in order that the user, when removing the siliconed paper protections, adhers them to the laminate or backing of his preference, the folder remaining thus formed and ready for binding the sheets or putting them in the folder, when removing the other siliconed paper protector. Finally, it must be said, that it is also possible to include the adhesive or gum strip in a bristol board part, protected with a silicone paper, leaving the user the possibility of incorporation or adding the cover sheets or back cover in order to form the folder. By means of the new use of re-usable contact gum or adhesives, it is possible to file or bind documents in a practically instantaneous manner, being equally rapid and clean the freeing of any type of previously bound document and rebinding it as many times as necessary. The self-adhesive material is susceptible of commercialization, applied in a bristol board backing, cardboard or any other material susceptible of backing the bound paper, all this in such a way that the said bristol board backing with the self-adhesive material may be commercialized in strips or piezes of which the user may divide into sections, parts with desired widths, to obtain a spine for a filing folder. That is to say, that these independent piezes or parts which are supplied and which the user may acquire, allow the latter to cut the desired width of strip as willed, in order to form the spine according to the needs, with which these independent piezes shall carry continuous microgrooves in order that the user may cut the amount required and form his folder with the width of spine needed and in any case, shall always be protected by a siliconed paper to protect the self-adhesive material. DESCRIPTION OF THE DRAWINGS In order to complete the description being expounded, and with the object of helping to achieve a better comprehension of the characteristics of the invention, this present descriptive report is enclosed, as an integrated part of the same, with a set of drawings in which the following has been represented with illustrative and non-limitative character: Figure 1. Represents a practical application of a contact adhesive or gum strip, suitably attached on the transversal zone of a bristol board with two folding lines which are marginal to the actual adhesive strip, forming in general, a bound folder of sheets or documetns which are attached independently over the said transversal adhesive strip. Figure 2 represents a cross sectional view of a folder with the adhesive strip attached in correspondance with the internal surface of the respective spine and including a series of bound sheets in said folder by a simple attachment of the edge corresponding to the surface of the adhesive strip. Figure 3 represents independent pieces which may be commercialized for purchase by the user and from here, obtain, by means of cuts at the desired width, of the parts of spine required, observing how those parts are microgrooved in order to possibilitate the desired width of that section, and the strip or assembly equipped with siliconed protection paper. Figure 4 represents a bristol board formed by a cover sheet and back cover ana on the same is applied a backing part of bristol board to form a spine which is considered as the width. Figure 5 finally represents, the same cover sheet and back sheet of the previous figure with the already attached spine, forming what may be considered as a filing folder of considerable thickness. PREFERED EMBODIMENT OF THE INVENTION As may be seen from the figures, the new use of re-usable contact adhesives consists in the application of a contact adhesive or gum strip (1) over the central and transversal zone of a bristol board (2), marginally affected on the lateral sides of said transversla strip (1), of a pair of bending lines (3), delimiting in between the same, a spine so that the bending, through the said bending lines shall determine in general, what may be considered as a folder according to figure 2, in such a way that the adhesive strip (1) shall be attached by means of heat application so it remains suitably stabilized, making possible that over the same may be attached, through its borders, a plurality of sheets or documents (4), with the possibility of detachment and use as may times as desired, by which, in its assembly, is determined, a binding means for any type of documents with the cold adhesion strength, that is to say, without requiring heating means for achieving that said sheets or documents (4) remain attached to the adhesive stip (1), as convencionally required. Undoubtedly, strip (1) offers a smooth and continuous surface which ensures a perfect adhesion of the edge of the sheets (4), throughout all its length. If the folder is foreseen to bind a great number of sheets, that is to say, that the power of the binding permits it to be a thick binding, then, the strip (1) may be completed with various strips, in lateral direction to the same, colaborating with the same, in better supporting the first and last sheets. Likewise, the strip (1) may be attached in correspondence with the marginal zone of a bristol board, so that the user may be the one to apply the desired cover sheet. In any case, the commercialization of the folders formed by the bristol board or cover sheets (2) with the strip (1), shall include a siliconed paper band, which shall protect said adhesive coat or strip (1), removing the said laiminate the moment when use is going to be made of the folder. Similarly, the strip may be comercialized by itself, protected with a pair of siliconed paper bands, covering both surfaces and the user shall be the one to free one of these siliconed bands, apply the band over a bristol board for the formation of the folder, with heat application, removing the other siliconed band when use is to be made of the folder for binding documents or sheets. As may be seen in the figures, the adhesive may be applied onto a bristol board backing (5) with parts delimited by the transversal lines (6), the length of which, shall correspond to the height of a filing folder, said parts (5) being microgrooved so that the user may cut them to the desired width and thus obtain the spine according to his requirements. In any case, said band or backing part (5) with the adhesive, shall be protected with a siliconed paper (7) as has been previously indicated. Said band or backing part (5) shall be equipped on its rear side, that is to say, on the said adherred to the adhesive material folder which is not re-usable, optionally applied in the form of strips, thus allowing its adhesion to the folder or simply to the the flaps (9) of the cover sheets and back covers (2). Thus, when the user acquires said part (5) and having the cover sheets and back covers (2) or front sheets as previously indicated, said part (8) may be attached to the same, which has previously been cut to the desired width, the same being situated between the slots (9) with which these cover sheets (2) are equipped with to that effect, as has been represented in figura 5, where the spine is formed by means of said part (8) intermediated between the cover or front sheets (2) and logically equipped with the corresponding adhesive. A final detail to be considered, consists in that the siliconed paper which protects the part (8) may be divided in longitudinal bands which allow their detachment from said part in sections according to the use which is required to be given to the folder, that is to say, if more or less documents are required to be placed in its interior.

Claims: Use of a re-usable contact adhesive strip as a means of cold adherence for a number of sheets which may be placed or removed as often as desired, characterised in that the contact adhesive strip (1) is arranged in bands or parts (5) affected with microgrooves which enable the user to cut bands of the desired width, obtaining filing folder with wide spine, and whose bands or parts (5) are complemented with the paraffined paper laminate (7) for protection of the respective adhesive. Use of a re-usable contact adhesive strip according to claim 1, characterised in that the contact adhesive strip (1) constitutes the spine of the corresponding folder which forms the cover sheets (2), or else, the spine of a folder formed by one single bristol board or laminate on which the corresponding cover sheet is attached by means of the adherence of the same over said contact adhesive strip (1).

Inventors: MILLAN CALVO FERNANDO, MILLAN CALVO, FERNANDO
Applicants: MILLAN CALVO FERNANDO, MILLAN CALVO, FERNANDO
Application year: 1995
Main classification: B42D1
IPC codes: B42D1