EP1900544A1 - Device for automatically gluing sheets of paper or cardboard - Google Patents

Abstract

The device has a storage reel (8) for storing a support covered with an adhesive film. An electrical motor unrolls the support outside the reel and transfers the support to a gluing zone. A glue roller (11) is moved between an operational position, in which the glue roller is in contact with a presser roll, and a non operational position, in which the glue roller is not in contact with the presser roll and a paper/board sheet. The paper/board sheet is moved between the glue roller and the presser roll in the operational position.

Description

FIELD OF THE INVENTION

The present invention relates to a device for automatically performing the gluing together sheets of paper or cardboard, so as to allow their assembly for the purpose of achieving a more complex structure such as including an album or a book.

More specifically, this sizing device is intended to integrate within a more complex unit, intended to ensure the realization in semi-automatic mode of such a structure, album or book, and for example the realization of photographic albums.

PRIOR STATE OF THE TECHNIQUE

The production of books or books is currently largely automated, the assembly of the various sheets constituting them being performed at a hinge with gluing the edge of each of the sheets gathered at the level thereof.

The problem arises in different terms as the album, and generally the work, results from sizing substantially over the entire surface of the page considered from one sheet to another.

In this configuration, it is desired as much as possible to implement in place of the liquid glue, a transfer adhesive film.

The present invention aims to provide a relatively simple structure for the transfer of such a film of glue transfer of a support on all or part of the surface of a sheet, including a photographic cliche, which he obtained by the digital or film process.

SUMMARY OF THE INVENTION

• une bobine de stockage d'un support revêtu d'un film de colle transfert ;
• un moyen moteur, destiné à assurer le déroulement du support hors de la bobine de stockage et l'acheminement de celui-ci au niveau d'une zone d'encollage ;
• un rouleau encolleur, mobile entre deux positions :
  • • une position opérationnelle, dans laquelle ledit rouleau encolleur vient en contact avec un rouleau presseur, entre lesquels la feuille à encoller est susceptible de progresser ;
  • • et une position non opérationnelle, dans laquelle le rouleau encolleur n'est plus en contact ni avec le rouleau presseur, ni avec la feuille de papier ou de carton.

The invention therefore relates to a device for automatically gluing sheets of paper or cardboard of low weight, comprising:

• a storage spool of a support coated with a transfer glue film;
• driving means, intended to ensure the unwinding of the support out of the storage reel and the routing thereof at a sizing area;
• a gluing roll, movable between two positions:
  • An operational position, in which said gluing roller comes into contact with a pressure roller, between which the sheet to be glued is likely to progress;
  • • and a nonoperational position, in which the gluing roller is no longer in contact either with the pressure roller or with the sheet of paper or cardboard.

According to an advantageous characteristic of the invention, the support axis of the gluing roller is capable of moving within through-holes. In addition, in the absence of any constraint, said glue roll is naturally in operational position; a spring system ensuring its maintenance according to this configuration.

The gluing roller is in the nonoperational position only under the action of an actuator which also induces the disengagement or stopping of the motor means ensuring the unwinding of the support provided with the transfer adhesive.

According to the invention, the device comprises a receiver coil of the adhesive film support, thus free of the transferable adhesive. According to a characteristic of the invention, this support storage coil is motorized and performs the function of the aforementioned motor means, and in particular the unwinding of the support provided with the transfer adhesive out of its storage coil; and the effective tension of the support after deposition of the adhesive film on the sheet of paper or cardboard.

In fact, the rewinding system only absorbs the support of the film released by the gluing, the length of which is determined by the roller of the machine cooperating with the gluing roller, which is driven by a stepping motor. Thus the length of glue dispensed is exactly the length of glued paper.

According to an advantageous characteristic of the invention, the two storage coils, respectively the support provided with the transfer adhesive and free thereof, are mounted on removable axes, so as to allow their interchangeability and corollary the change of format of the support and therefore of the transferable adhesive film, and therefore corollary its adaptation to different formats of sheets to be glued.

BRIEF DESCRIPTION OF THE DRAWINGS

• La figure 1 est une représentation schématique en perspective du dispositif d'encollage conforme à l'invention.
• La figure 2 est une vue latérale du dispositif d'encollage de la figure 1.

The way in which the invention can be realized and the advantages which result therefrom will emerge more clearly from the exemplary embodiment which follows, given as an indication and without any limitation in support of the appended figures.

• Figure 1 is a schematic perspective view of the sizing device according to the invention.
• Figure 2 is a side view of the sizing device of Figure 1.

DETAILED DESCRIPTION OF THE INVENTION

The device of the invention consists of a cassette, capable of being introduced into a receptacle provided for this purpose, provided in a more complex installation of a book, and more particularly a photographic album , and described in a patent application filed that same day by the Applicant.

This device therefore comprises a frame (1), provided with two lateral flanges (2) and (3) parallel to each other. Each flange has two slots or luminescent openings (4) and (5), facing two by two, and adapted to receive the shafts (6) and (7) support two coils (8) and (9).

The coil (8) is intended to store a support coated with a transferable adhesive film, such as for example marketed by the companies 3M or TESA. Typically the support is non-adhesive, and is for example made of silicone. The transferable adhesive film is based on acrylic or vinyl or other. However, acrylic is best suited to the permanent collage of photographic paper.

The coil (9) is intended to store the silicone support without the adhesive film, and therefore, after depositing the latter on a sheet of paper or cardboard.

Due to the implementation of the emerging lights (4, 5), the coils (8, 9) can be very easily changed, thus allowing the format change of the sheets to be glued.

According to the invention, the coil (9), and more specifically the axis (7) which receives it, is motorized by means of an electric motor not shown. In doing so, the coil (9) ensures firstly the unwinding of the support provided with the adhesive film out of the coil (8), and consequently the tension of the support after transfer of the adhesive, in order to avoid any risk of continue its progression simultaneously with the support provided with the adhesive film.

According to the invention, the device according to the invention comprises a return roller (10) located downstream of the coil (8), and around which are partially wound on the one hand, the support provided with the adhesive film, and on the other hand, the support without the adhesive film, and therefore after passing around the roller glue (11). There is therefore friction of the sole support at this level, which does not prove to be inconvenient because of the non-adhesive nature of the silicone material that constitutes it. In addition, it promotes blocking of the adhesive film when the roll is not in contact with the paper. It is the movement of the paper that releases the friction and allows the recovery of the used film by the motorized coil.

• • une position par défaut dans laquelle il est en situation d'encollage, en coopération avec un rouleau presseur motorisé intégré dans une structure plus complexe du type de celle décrite dans le brevet déposé le même jour par le Demandeur,
• • et une position non opérationnelle, dans laquelle le rouleau (11) est escamoté, et notamment dans laquelle il n'est plus en contact avec ledit rouleau presseur, la feuille de papier ou de carton pouvant alors circuler librement à ce niveau. La tension du film de colle est contenue par le frottement résultant de la superposition du film de colle en attente, et du film de colle usagé.

According to the invention, the gluing roll (11) is movable between two operational positions, respectively:

• A default position in which it is in bonding situation, in cooperation with a motorized pressure roller integrated into a more complex structure of the type described in the patent filed by the Applicant on the same day,
• And a non-operational position, in which the roller (11) is retracted, and in particular in which it is no longer in contact with said pressure roller, the sheet of paper or cardboard then being able to circulate freely at this level. The tension of the adhesive film is contained by the friction resulting from the superposition of the pending adhesive film, and the used adhesive film.

Thanks to the action of the motorized roller of the installation in which is intended to come to integrate the device of the invention, the glue follows the paper to be glued by the pressure of the gluing roller, and because of the movement of said roller motorized.

For this purpose, the ends of the support axis of the gluing roller (11) are each received in a through-hole (12) formed in the side flanges (2, 3).

The gluing roller is maintained in the absence of any constraint in the operative position, ie to the left of the through-light in FIG. 2 under the action of a spring rod (not shown).

The gluing roll (11) is pushed to the bottom of the through-light (12) (on the right in FIG. 2) under the action of an actuator (not shown). This actuator is capable of being driven by a relatively high speed, so as to induce the rupture of the adhesive film when it is actuated, and thus, to avoid the continuation of its detachment of the support, despite the end of the operation. gluing.

Outside the gluing phases, the sheet to be glued passes between the pressure roller and the glue roll (11), then in the nonoperational position. The programmable controller that manages the device induces in this configuration the disengagement or the stop of the electric motor ensuring the rotation of the coil (9). Advantageously, it is a decrease in the electrical current supplying the motor of the coil which generates a sufficient traction force to maintain the support in the extended position.

On the other hand, in the gluing phase, the actuator acting on the gluing roller stops exerting its thrust of said roller at the end of the through-slots (12), so that said gluing roll naturally returns to pressure against the pressure roller, and therefore against the back of the sheet to be glued, positioning at this level the adhesive film which then circulates at this level under the effect of the traction exerted by the coil (9), its engine being again engaged or under tension.

It is specified that the speed of progression of the sheet to be glued is the same as that of advancement of the support of the transferable adhesive film, the adhesive film being deposited by simple pressure on the desired surface of the sheet.

After transfer, the carrier free of transferable adhesive is returned via the return roller (10) to the reel (9) for storing said carrier.

The extreme simplicity of the operation of the sizing device according to the invention is conceived by allowing a simple programmable automaton, itself operating according to particular parameters, in particular the length of the sheet of paper to be glued, to act simultaneously on the actuator acting on the gluing roller and on the motor providing the unwinding of the storage spool (8) and the winding on the storage spool (9).

Claims (7)

Device for automatically gluing sheets of paper or cardboard of light weight, characterized in that it comprises: - a storage reel (8) of a support coated with a transfer glue film; - A motor means for ensuring the unwinding of the support out of the storage reel (8) and the routing thereof at a sizing area; a gluing roll (11) movable between two positions: An operational position, in which said gluing roller comes into contact with a pressure roller, between which the sheet to be glued is likely to progress; • and a nonoperational position, in which the gluing roller is no longer in contact either with the pressure roller or with the sheet of paper or cardboard. Device for automatically gluing sheets of paper or cardboard of low grammage according to claim 1, characterized in that the support axis of the gluing roller (11) is able to move within through openings (12), arranged within the chassis defining the device. Device for automatically adhering sheets of paper or cardboard of low grammage according to claim 2, characterized in that in the absence of any stress, the gluing roller (11) is naturally in operational position; a spring system ensuring its maintenance according to this configuration. Device for automatically gluing sheets of paper or cardboard of low grammage according to one of claims 1 to 3, characterized in that the gluing roller (11) is in a nonoperational position only under the action of an actuator, the implementation of which also induces the disengagement or stopping of the motor means ensuring the unwinding of the support provided with the transfer adhesive. Device for automatically adhering sheets of paper or cardboard of low grammage according to one of claims 1 to 4, characterized in that it further comprises a receiving reel (9) of the support of the adhesive film, therefore free of the transferable adhesive. Device for automatically adhering sheets of paper or cardboard of low grammage according to claim 5, characterized in that the storage reel (9) of the support free of the transfer adhesive is motorized and performs the function of the motor medium, and in particular the unwinding of the support provided with the transfer adhesive out of its storage reel (8); and the effective tension of the support after deposition of the adhesive film on the sheet of paper or cardboard. Device for automatically gluing sheets of paper or cardboard of low grammage according to one of claims 5 and 6, characterized in that the two storage coils, respectively (8) of the support provided with the transfer adhesive and ( 9) of the support without it, are mounted on removable axes, so as to allow their interchangeability and corollary the change of the format of the support and thus the transferable adhesive film, and therefore corollary its adaptation to different formats of leaves to be glued.

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