LU82231A1 - NOVEL TRINGLES BINDER AND MANUFACTURING METHOD THEREOF - Google Patents

Description

Λ T, 'invention relates to a new process for manufacturing a. •• ν' - "i £>: re with rods and the binding obtained by this method, it is known to make rod bindings. These i -ent ί.-onstituêeses in a conventional manner by two dishes of covered S-cardboard joined in an articulated manner by a back also in cardboard.

The two cover plates and the back are generally covered on both sides with a polyvinyl chloride coating, hereinafter referred to as PVC, while the joints of the plates 10 with the back are advantageously obtained by simple welds carried out on the coating. PVC between said dishes and the back.

At each end of the inner face of the is fixed, by riveting, a metal housing conventionally comprising a trigger guard. The housings are arranged opposite one another and their trigger guard is provided with thin windows intended to receive the ends of metal rods.

To regulate the back of the binding constituted by a cardboard of reduced thickness, it has been imagined to produce said cases by folding the two ends of a metal strip which is fixed to the back of the binding by riveting and possibly covered with PVC. .

The binding rods are previously threaded between the pages of bound journals or in fitted cases has its effect along the edges to be bound of document protectors or bundles of document protectors formed each of those plastic sheets fixed one to the other on three sides or of a sheet folded along the opposite edge s the one that will have joined and welded on two other sides.

This type of known binding has serious drawbacks.

30 First of all, the fixing of the metal cases p = r riveting is oarti-i culiereires unsightly since the rivets are necessarily * visible and in addition couesux especially "t or s had the gold g- * ü c® a 2 strip from r.-tal as mentioned above.

In addition and above all the edges of said bridges always feel more 35 or me ns cutting and bxes & snt for ^ dishes t— cover when rsiitts esc terms, "is- point, view" · nr? The embal. i -î this tsij.es rej.iures it is necessary of cisoos® “* ï 5“ • oreesax es carton pro tv? CwSurs »/.

to c'u-vier these drawbacks, the invention: uiy; / 40 proceeds crm is rem s rems Di s in that l j. ocap * 'sfp: /, / a / to make each of the housings in forras with a flat base soli-I of an openwork trigger guard, by molding a synthetic material! rigid and weldable by ultrasound; b / to use for the back of the binding a material of the same nature as that of the boxes · c / to provide a cut in the PVC coating of the internal face of the back at each of the locations provided for the fixing of the boxes ; d / to weld the housings in the above-mentioned cutouts by ultrasound.

The inventor has imagined to cut out cuts because the ultrasonic welding, necessary in this case given the thickness of the bases of the housings, can only be carried out between two materials of the same kind.

However, it has been discovered quite surprisingly that it is possible to directly weld said cases through the PVC coating. This is why, according to another embodiment, the invention proposes a manufacturing process. remarkable in that it consists: 20 a / to make each of the housings in the form of a solid flat base! be made of an openwork trigger guard, by molding a rigid synthetic material and weldable by ultrasound; b / a use the same material for the back of the binding | | than that of the boxes; | 25 c / to weld directly the housings through ultrasound! PVC coating on the inside of the back at the desired locations, said VC then being at least partially destroyed and / or retracted at the locations of the welding electrodes.

This discovery is surprising and poorly explained. It seems that 3p the PVC is partially destroyed and slightly retracted so that at the locations of the teeth of the welding electrode in the form of a comb, the PVC has openings after welding.

The material used to make the cases and the cos of the binding is preferably prolypropylene. However, it is possible to use other materials such as polyester, polyethylene etc. ".

ί "'- vώ, ηtusem ^ nt, xes éxecurooes ce sonuure are pressed o— the base these boxes at a depth at least equal to the thickness of said bases.' / 3 The invention also relates to bindings obtained directly or not by the processes mentioned above.

The invention will be better understood on reading the description which follows with reference to the appended drawing in which: FIG. 1 shows a binding laid flat intended to be fitted with housings according to the invention.

FIG. 2 shows a housing according to the invention and

Figure 3 shows in perspective a binding equipped according to 1'.invention.

] _0 'Figure 1 shows a binding with two cover plates 1 and 2 in cardboard and a back 3 in polypropylene.

The two faces of said plates 1, 2 and of the back 3 are covered with a coating of polyvinyl chloride or PVC welded all around said binding according to a peripheral weld 4 as well as between ^ 5 the plates 1, 2 and respectively the back 3 in 5 and 6.

The welds 5 and 6 advantageously allow the joints between the plates 1, 2 and the back 3 to be easily produced.

At the ends of the internal face of the back 3 are cutouts 7 and 8 in the PVC coating.

2o In the cutouts 7 and 8 thus produced are ultrasonically welded boxes 9 (Figure 2) also made of polypropylene. The housings 9 come from molding and include ur. flat base 10 secured to a trigger guard 11 provided with elongated windows 12.

However, it has been discovered that said boxes can be welded directly to the back 3 without it being necessary to spare the cutouts 7 and 8. This process is surprising since ultrasonic welding generally requires materials of the same kind. .

The housings 9 are arranged opposite one another (FIG. 30 3) in such a way that it is possible to insert into the windows 12 of the bridges 11 the ends of this binding rods 13. In FIG. 3 we can see opens the recesses made on the bases • 10 these boxes by the teeth of the electrodes this welding.

The process which consists in providing for preliminary cutouts pre-35 also feels the advantage of avoiding the formation of unsightly folds on the cover. Jce j.s race meerne gu ucs "

FIG. 2 shows a binding provided with two flaps 14, 15 arranged on the internal faces of the cover plates 1 and 2. The said flaps 14, 15 intended to receive additional documents are / 40 advantageously produced with a material similar to that .utili? // i 4

It is obvious as it has already been said that the rods are threaded beforehand inside the documents to be bound or in cases fitted on one of the sides of document protectors to be linked advantageously assembled in several bundles.

The embodiments described are obviously given by way of examples and numerous modifications or variants can be imagined without departing from the scope of the invention. / * / 7 /: ^! ! i j I ’· i, I.

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Claims (4)

1. A method of manufacturing a binding made up of two cover plates articulated on a back provided on its internal face with two housings arranged opposite one another in the vicinity of its two ends and arranged to receive the ends of 5 binding rods while the two sides of the cover and back flats have a polyvinyl chloride (PVC) coating, characterized in that it consists of: a / making each of the boxes in the form of a flat soli base daire of a perforated trigger guard, by molding a rigid synthetic material 10 and weldable by ultrasound. b / to use for the back of the binding a material of the same nature as that of the boxes; c / S provide a cut in the PVC coating of the inner face of the back at each of the locations provided for fixing the boxes; d / to ultrasonically weld the boxes in the aforementioned cutouts. 2.-Process for manufacturing a binding consisting of two cover plates articulated on a back provided on its internal face 20 with two housings arranged opposite one another in the vicinity of its two ends and arranged to receive the ends of binding rods while those facing these dishes this cover and the back have a coating of polyvinyl chloride (PVC) characterized in that it consists: 25 a / to make each of the boxes in the form of a flat base secured to an openwork trigger guard, by molding a rigid synthetic material and weldable by ultrasound. b / to use for the back of the binding a material of the same nature as that of the casings i 30 c '/ to weld the casings by ultrasound directly through the PVC coating on the internal face of the at the desired locations, said PVC is then at least partially destroyed and / or retracted at the locations of the welding electrodes. 3. -Procédé according to one of claims 1 and 2 characterized in "35 ce eue the material used for confetti tuner the cases and. = Back of the binding is polypropylene. 4.-A method according to any one of these claims 1 to 3 characterized in that the welding electrodes are pressed into 'the base these boxes with a prof encoder at least ecraie i i'éosâesaur cæSits, -socles. 6 ij 5.-Binding consisting of two cover plates articulated on i a back provided on its internal face with two housings arranged in relation to one another in the vicinity of its two ends and arranged to receive the ends of rods binding while the two sides of the cover and back flats have a [polyvinyl chloride (PVC) coating characterized in that it comprises boxes each made in the form of a flat base secured to an openwork trigger guard and which are obtained by molding; , of a rigid synthetic material which can be welded by ultrasound such as polypropylene while said housings are welded by ultrasound at the desired locations on the internal face of the back which is made of a material similar to that of the housings. 6. -Binding according to claim 5 characterized in that the boxes are welded on the inner face of the back in cutouts 15 previously made in the PVC coating. 7. -Binding according to claim 5 characterized in that; the boxes are welded directly through the t PVC coating on the inside of the back. 1 ~ ^ ~ p „r; ....... ... R ......- s :: - r: ^ -! ...... 4: - ·· ‘j. .... i. . · ~ ^ 'I Λ C ^ Otif! 7 / * * - · - W ’\ j i j t i i i i