| GB1519170A | 1978-07-26 | |||
| GB261220A | 1926-11-18 |
| 1. | Bookbinding method, characterised in that: transversal cuttings (11) have been made on the back of the sheetstack to book bind (D) and said back (D) is impregnated with an elasticrubber based glue that penetrates the said transversal cuttings. |
| 2. | Book (D) obtained with the method according to claim 1, characterised in that it comprises: a plurality of transversal cuttings on its back (11), said back and said cuttings 411) are impregnated with elastic gummy glue (11111) so that as the book is opened. elastic filamentous binding threads, through said carvings maintain the sheets of the book united. |
| 3. | Book according to second claim, obtained with the method according to claim 1, characterised in that it comprises a book binding rubber based glue comprising : caoutchouc, and/or neoprene, and/or polypropylene, and/or chloroprene, and/or silicon or their mix. |
| 4. | Book according to second claim, obtained with the method according to claim 1, characterised in that it comprises a book binding rubber based glue comprising: caoutchouc, and/or neopren and/or polypropylene, and/or chloroprene, and/or silicons or their mixture in which the respective macromolecules are at least predominantly and substantially in a linear structure. |
| 5. | Book with rubberbased glue bookbinding according to claim 3, characterised in that it includes solvents of the group : cyclohexane. Mek. acetone, ethyl acetate. Nhexane. toluene. |
| 6. | Book with rubberbased glue bookbinding according to claim 3, characterised in that it includes at least an antioxidant. |
| 7. | Book with rubberbased glue bookbinding according to claim 3, characterised in that it includes binders of the group : phenols, and/or aromatic amines, and/or sulphurated compounds. |
| 8. | Book with rubberbased glue bookbinding according to claim 3, characterised in that it includes antidegrading substances included in the group of: aldole, and/or alphanaphthylamine, and/or hydroquinone. |
| 9. | Book with rubberbased glue bookbinding according to claim 3, characterised in that it includes pigments and/or organic or inorganic dyes. |
| 10. | Method according to claim 1, to realize a book according to any of claims 2 to 9, characterised in that said transversal cuttings (I I) are I to 23 millimetres spaced apart, preferentially around one millimetre, and their depth is of at last one millimetre. |
| 11. | Book realised according to the characteristics of any previous claims characterised in that the said transversal cuttings (I I) are 12 millimetres spaced apart and have approx: one millimetre depth. |
| 12. | Book realised according to the method of claim I and/or 10 and involving a bookbinding according to any of claims 1/9 and/or I I. |
This invention is preferably, although not exclusively. used to bind in stack to make a book, thick paper-sheets or similar for which their non-flexibility, reduces the life of the book or renders it laborious to use.
Background Art In prior art thick sheets such as pasteboards and photographs are too thick to be bound in stack as a book, (book- binding).
If we use clips, these cannot easily open, if we use edge punchings clamping is hampered and also difficult is the opening of the obtained book, stack or dossier, because of the rigidity of the sheets.
If we use binding glues, the glue is too rigid, and consequently the opening of the book is not easy and the glue or binding breaks in opening, in opening binding is broken even if back plie reinforcing means are used, as the glue, usually very stiff, breaks. not only for the forcing due to the rigidity of the sheets but also for the repetition of use.
The result is that this problem is not solved for pasteboards such as photographs and similar sheets, for which one must use the normal punching techniques, that amongst other drawbacks cause breakage and the detachment of the sheets.
More resistant binding techniques are made with the aid of
transversal millings or cuttings or carvings and following impregnation with glue.
This operation is however expensive and requires large amount of glue.
The excess glue subsequently increases rigidity and makes it difficult to open the stiff-sheet book.
Purpose of the invention Purpose of this invention is to avoid the above-mentioned drawbacks.
Essence of the invention The problem is solved as claimed by a book-binding system. characterised in that: -transversal cuttings on the back of the paper-stack to bookbind has been made, and -said back is impregnated with an elastic-rubber based glue that penetrates in said transversal cuttings.
Advantages of the invention The advantages obtained with this solution are that the back- binding elastic glue of the book, in opening the book elongates along said transversal cuttings realizing a plurality of elastic links or elastic threads because of said gummy rubber-like flexible layer on the back that is penetrated in said transversal cuttings. In this way it is possible to open the book fully. even if it is made up with stiff or rigid sheets, and this without causing breakage in the back opening zone. even if it is repeatedly used for a large number of openings.
Description of one solution of the invention These and other advantages appear in the following
description of a preferred solution, with the aid of the included drawings, whose details are not to be considered limitative. but only supplied as an example.
Figure I is a perspective showing the back view of the book with said transverse or transversal cuttings for the application of the glue; Figure 2 is the open book view in which the glue in correspondence with said transversal cuttings is obliged to elongate realizing elastic threads that maintain the book-sheets linked to each other, avoiding back-breaking.
The Figures 3 is a side view of the open book.
As disclosed in said figures: (D) indicates the book, and IA, IB indicate the two sides of the open book.
11 indicates the transversal cuttings on the back of the sheet-stack to realize said book (D). Said cuttings are approx: one millimetre deep.
Advantageously the cuttings are I to 2-3 mm., spaced apart. preferably approx : I mm. But it is obvious that said distance can vary in accordance with the desired results.
The glue is a rubber-like based elastic material as caoutchouc (indian rubber) or neopren. polypropylene, chloroprene. silicone rubbers and/or butadiene rubber material.
The binding material is substantially a macromolecular elastic material with macromolecules having substantially linear structure.
The gummy glue resins can also be made with aliphatic isomeric mixtures.
Obviously limited sulphur is provided during vulcanisation to avoid
hardening.
Solvents are advantageously included in the proportion of 30,39, 41 : Cyclohexane, Mek, acetone-benzol, ethyl acetate, N-hexane. toluene.
It is possible to provide also antioxidant and other binding base materials as phenols, aromatic amines, sulphur compounds.
To avoid solar degradation (UV-resistance) it is provided to add aldolo. alphanaphthylamine, hydroquinone materials.
Pigments and/or organic or inorganic dyes can also be provided.
Advantageously the book obtained with the method according to main claim is characterised in that it comprises: -a plurality of transversal back cuttings (11-D), -said transversal cuttings are impregnated with gummy glue (11- 111) so that as the book is opened, said gummy glue in said transversal cuttings, elongates realizing filamentous elastic binding threads through said cuttings, maintaining all the book- sheets united.
-Obviously a dorsal (back) layer, however thin will be good.
-Obviously even if with greater cost, a thin Hot-Melt film can be provided on the back (Hot film binding back-layer).
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