EP0838071A1

EP0838071A1 - Automatic wrapping sheet dispensing apparatus

Info

Publication number: EP0838071A1
Application number: EP96923790A
Authority: EP
Inventors: Annette Fleury; Pierre Colard
Original assignee: Individual
Current assignee: Distributeurs International Colard Sa
Priority date: 1995-07-13
Filing date: 1996-07-15
Publication date: 1998-04-29
Anticipated expiration: 2016-07-15
Also published as: CA2227028A1; DE69604669D1; ATE185641T1; WO1997003422A1; EP0838071B1; BE1009744A4; ES2141517T3; DE69604669T2; DK0838071T3; AU6410296A

Abstract

An apparatus for automatically dispensing a sheet material from a supply roll of gift-wrapping paper, comprising means for supporting the roll from which a sheet may be unrolled, sheet feeding means and means for cutting the unrolled sheet. The apparatus further includes means for rewinding the unrolled sheet, said means being arranged to enable each cut sheet to be rolled into an output roll having a selected length.

Description

APPARATUS FOR AUTOMATICALLY DISPENSING PACKAGING SHEET

The present invention relates to an automatic sheet dispensing apparatus, in particular for packaging, from a supply reel, in particular for paper, in particular for gift packaging.

In known automatic dispensing apparatus, sheets of a material such as paper can be obtained from supply reels. These known devices however have the major drawback that the sheet, in particular of the paper obtained, becomes cumbersome to handle, especially when the sheet length exceeds a certain value. In addition, users tend to want to roll up the sheets obtained, most often performing this operation on site. Thus queues are formed in front of this type of automatic sheet dispensing device, which at the same time is an inconvenient waste of time for all users. In addition, the result obtained is often mediocre, the rolled up paper being very often crumpled during the winding of the latter, whether by store attendants or by customers. This fact is aggravated as the desired sheet length increases. This drawback is all the more troublesome when the sheet material concerned is made up of paper which is to be used as gift packaging. In this case a rigorously clean appearance and presentation become essential conditions for the presentation of products.

The device according to the present invention aims to remedy the aforementioned drawbacks. Thus, the present apparatus comprises support means for maintaining said supply reel in a certain orientation, the latter being unrollable in sheet form, means for driving said sheet from said supply reel; means for cutting the unwound sheet which can be actuated for a selectable length of cut sheet. According to the invention, the automatic dispensing device is remarkable in that it further comprises means for rewinding the sheet unwound from the supply reel, which are arranged so as to allow rewinding per unit of each sheet cut out in the form of a roll of selectable length.

Thus, thanks to the dispensing device according to the invention, the user can have ready-made rolls at the outlet of the dispensing device. The user therefore no longer has to carry out the cutting himself, the dispensing device ensuring a clear cutting quality. In addition, the user just has to grab the roll and give way to the next user in the queue, thus ensuring rapid handling, which avoids congestion at the level of the dispensing device. In addition, the direct packaging in roll form ensures a good presentation to the roll, which is particularly appreciable when it comes to wrapping paper, in particular gift wrapping. Again, a significant reduction in size in the queue is obtained by the fact that the user no longer has to risk winding himself the paper cut into rolls.

In an advantageous embodiment of the invention, said rewinding means consist of at least one pair of arches having a certain internal curvature, which are arranged face to face so as to substantially delimit a circle around their periphery interior. However, this is interrupted over at least a small portion which is intended to form a feed gap to allow the incoming sheet to penetrate each pair of rewinding arches. These can be spread apart at the height of their respective ends under the action of control means, advantageously with a connecting rod. In addition, each pair of arches is preferably arranged at regular intervals, in a plane substantially perpendicular to the direction of the supply coil. The continuous internal curvature allows a roll shape to be naturally printed on the unrolled sheet of material.

More advantageously, one of the hoops of each pair is significantly longer than the other hoop of the corresponding pair. Each longer hoop constitutes the upstream hoop by receiving the incoming sheet and initiating the rewinding thereof. The shorter hoop is located downstream of the longer hoop so as to loop the incoming sheet in a roll oriented substantially parallel to the feed reel.

Thus, the transition between the upstream and downstream arches which appears to the sheet being rolled as a discontinuity, however small, occurs sufficiently downstream that the process of forming the desired roll is not 'finds practically unaffected.

In this respect, the aforementioned upstream arch preferably has an arc length practically equal to or slightly greater than 180 °. Thus, a sufficient initiation of the winding of the sheet is ensured in a rigorously continuous manner, thus avoiding any crack in the formation of the roll. In a particularly advantageous embodiment of the invention, the hoops of each pair have a common end and are arranged in mutual pivoting, preferably at the height of their common end, between a closed position and an open position and preferably, the longer arch is pivotally arranged towards the base of the device with respect to the shorter arch, which is fixed, so as to allow the discharge of the output roller in the open position. Thus, when the swivel bar is caused to swivel down, the output roller can be removed in an extremely convenient manner.

Thus, an ejector is advantageously provided facing the above rewinding space so as to allow forced evacuation of each output roller under the action of the ejector. This ensures total reliability of the device with regard to its evacuation of the desired roll.

In particular, the ejector consists of at least one ejection rod arranged between adjacent pairs of arches, said rod being movable towards said rewinding space. This mode is an extremely simple, fast and efficient way to eject each roll even at high speeds.

In a preferred embodiment of the invention, a receptacle is provided below said rewinding means so as to receive each roll taken out of said rewinding means. In particular, said receptacle has a practically flat bottom which is oriented practically parallel to the supply reel and this in opposite inclination to the rewinding direction of each aforementioned output roller. No only the receptacle makes it easier for the user to enter the selected roll, but above all the direction of inclination maintains and even favors the roll in its rolled up state.

In addition, said receptacle constitutes the presentation zone of each selected roll while constituting the only zone of the apparatus which is accessible to the secondary user of the apparatus. This gives the device great safety in use, especially for the public.

In a further embodiment of the invention, the aforementioned drive means of the material sheet comprise a drive cylinder arranged in rotation on an axis parallel to the feed reel, between the latter and the means of rewinding, so as to drive the sheet of material towards the rewinding means. Said drive means cooperates with pressure means arranged practically against the drive cylinder, said sheet of material being advanced therebetween. Thanks to this simple arrangement, the unwound sheet of material is pushed towards the rewinding means, thus using only a purely static roll forming device.

More particularly, the pressure means comprise a set of rollers suspended from a locking frame of the device so as to be removable relative to the drive cylinder and to be able to be driven in rotation by the latter, said locking frame. being movable between an open position and a locked position. More particularly still, said pressure rollers are arranged in pairs, in carriages pivotally suspended from a suspension bar fixed in said frame so that said pressure rollers can freely adapt against the drive cylinder when the frame is brought into the locking position after each supply coil renewal. This ensures perfect hold of the pushed sheet, between the rotating means, thus improving the push exerted by said rotating means on the sheet.

Preferably, return means are arranged in connection between the head of each pressure carriage and the locking frame which are intended to bring the rollers against the drive cylinder after each locking. The constancy of the proper functioning of the rotating means, namely the drive cylinder and the rollers, is ensured.

An additional locking member is provided to cooperate with said cutting means, the latter being movable at least from one side to the other of the sheet of material under the control of a control means, which triggers the member of the aforementioned additional locking mechanism so as to reinforce the pressure of said rollers against the drive cylinder during the sheet cutting operation. In particular, the aforementioned cutting means is arranged in abutment on a guide means, preferably a movable guide plate which is fixed on the aforementioned frame, so as to wedge the sheet against said guide means. Thus, during the cutting of the sheet, the pressure means are caused to tighten even more against the drive cylinder by immobilizing the sheet, which ensures a very clean cut. In addition, the primary user cannot therefore open the frame at the end of the cut, which ensures its safety.

Preferably, means for guiding the sheet of material are provided downstream of the aforementioned drive means and upstream of the rewinding means. This brings the sheet in the perfect state for the initiation of its rewinding in the rewinding means.

In an alternative embodiment of the invention, means for reducing the diameter of the output roller are provided. These are particularly suitable in the case of sheets of short length, the more open curvature of the hoops then not being able to prove to be perfectly adapted.

In particular, the diameter reduction means comprise at least one arc element of curvature clearly more pronounced than that of the aforementioned rewinding means, which is arranged inside the aforementioned rewinding space with the curvature turned towards the 'upstream arch above.

In order to ensure as smooth a transition as possible between the inner periphery of each pair of arches on the one hand and the arc element of the abovementioned reduction means on the other hand, the initial arc point of this the latter is brought into practically geometrical coincidence with the vanishing point of the former without the first point being able to form an obstacle to the formation of the roll.

In a particularly advantageous embodiment of this variant of the invention, each aforementioned arc element is arranged in extension of a lever forming pendulum and rocking around an axis parallel to the supply reel under the effect of an increase in volume of the output roller during rewinding thereof and more particularly each diameter reduction means is arranged against -adjustable weight. Thus, the apparatus is made perfectly suitable for an extremely wide range of sheet lengths to be packaged in rolls. The upper limit corresponds to the internal diameter of the pair of rewinding poles.

In this regard, it is even provided that when the diameter of the roller being formed exceeds the threshold permitted by the curvature of the arc element of the abovementioned reduction means, the latter gradually disappears upwards until height of the downstream arch itself by being raised to a corresponding level, so that from this moment, it is the curvature of the pair of arches which becomes decisive for the roll in formation.

Preferably, the respective tangents at said points P and R form between them an angle β not less than 135 °

In order to ensure good axial distribution of the shape constraint means, each diameter reduction means is arranged between two mutually adjacent rewinding means in a substantially equidistant manner between them.

In another very advantageous embodiment of the invention, said means for supporting the supply coil comprise a support rod on which are adjustable means for tightening for each side of the supply coil. Thus, the device is perfectly adaptable to different widths and diameters of the spool.

More particularly, said clamping means consist of a pair of clamping cones threaded axially on said support rod with their respective conicities and vertices facing one towards the other.

A means of damping the feed reel is provided, in order to compensate for the inertia of the latter when it is rotated and that it must stop rotating when the selected sheet length is reached.

Effectively, said damping means consists of a weight suspended from the chassis of the apparatus so as to rest continuously on the supply coil on the trailing side thereof.

In an entirely preferred embodiment of the invention, the apparatus further comprises means for selecting the length of the sheet to be cut which can be actuated by the user of the apparatus. More particularly, the selection means consist of a coin-operated token and / or coin changer, preferably with electronic control.

Other particularities and details of the apparatus according to the invention will emerge from the description given below of some exemplary embodiments illustrated with the aid of the appended drawings.

Figures 1 and 2 illustrate a vertical sectional view 1 apparatus according to the invention placed on a floor in respective states.

Figure 3 illustrates a partial front elevation view of the apparatus according to the invention.

Figure 4 illustrates a detailed view on an enlarged scale of the rewinding means shown in their two operating states.

Figure 5 illustrates an enlarged detail view of a means for reducing the diameter of the apparatus according to the invention.

Figure 6 shows a view similar to Figure 1 broken.

Figure 7 illustrates a perspective view of one dispensing apparatus according to the invention in the loaded state.

Figures 8 and 9 each schematically illustrate a partial view of the device with the locking frame in the closed and open positions respectively.

In general, the invention relates to an automatic dispensing device for sheets delivered at the outlet in the form of rolls. They are essentially packaging sheets of all materials, mainly paper, especially for gift wrapping, the devices being placed on the floor or on the flat of a presentation table for example.

The invention is described below more particularly for an automatic packaging paper dispenser device intended for the general public, particularly in large distribution points, such as supermarkets, self-service specialty stores, etc. In the description below, the term "primary user" should be understood to mean any person authorized by the operator of the device, the secondary user designating the "customer" brought to use the dispensing device as such.

FIG. 7 illustrates the example of a device in the charged state placed on a table or posable on any support of raised base type. We can distinguish the appliance box 100, which makes it possible to make the contents of the appliance inaccessible and to reserve the loading of the latter in supply coils 1 to strictly authorized persons. The device illustrated in Figure 1 is in turn placed on the ground and is illustrated in its content by its essential components.

On a support means 10 arranged in rotation is placed a supply reel 1. From the reel 1 is unwound a sheet 11 according to the orientation of the arrow designated by F and which is brought to drive means 2 These consist, for example, of a driving cylinder arranged in rotation in the direction of the arrow designated by J under the control of a motor, for example with direct coupling, so as to force the sheet to advance along F as indicated towards the cutting means 90 of the sheet 11. The above-mentioned cutting means 90 consist for example of a knife blade with Nauder knife guide 91 actuated by a motor driven by a belt (two-way) and they can be actuated for a length of desired sheet that the user selects. Remarkably, the automatic dispenser comprises rewinding means 3 which make it possible to rewind the sheet 11 unwound from the reel 1. The rewinding means are arranged so as to allow rewinding per unit of cut sheet 11 so as to produce a roller 12 at the outlet of the device which has the length selected by the user. The above rewinding means delimit a rewinding space 30 inside which the roll 12 is formed by winding the sheet in the direction indicated by the arrow G.

The aforementioned rewinding means consist, for example, of a number of pairs of arches 31, 32 having a certain curvature so as to print the state of the roll 12 on the cut sheet 11. The aforementioned arches 31, 32 are thus arranged so as to form together a perimeter 33 of substantially continuous and progressive curvature around their inner periphery. The inner periphery is interrupted only over a small portion so as to form a supply interstice 34 for the incoming sheet 11. FIG. 1 illustrates the arches 31, 32 in the closed state designated by A.

However, as illustrated in FIG. 2, the hoops 31, 32 can be separated from each other, in particular by the pivoting of each hoop 31 downwards in the direction of the arrow indicated by H. The displacement of each lower hoop takes place under the action of control means 35, 35 ', which consist for example of a cam and connecting rod device 35'. By the rotation of the cam 35 around its center of rotation, the connecting rod 35 'is brought to drive the lower arch 31 into its extreme open position designated by B in FIG. 2. Thus, the opening of the arches East for example controlled by means of a motor with opening in continuous movement thanks to the arrangement of the cam means 35 with wheel making a turn cooperating with the connecting rod 35 '.

The extreme opening B of the arch 31 coincides with the exit of the formed roll 12. The formed roll 12 being expelled then ends up by gravity in a receptacle 4 from which a roll taken out of the device designated by the reference 12 'can be entered by the user who ordered the dispenser. Advantageously, the internal perimeter 33 of the pair of arches 31, 32 in the closed state A has a substantially circular shape.

Preferably, the upstream arch 31 first receiving the sheet 11 is longer than the other downstream arch 32 so as to ensure a good start being located on a sufficiently long path, for example with a length of arc almost equal to or slightly greater than 180 °, of the rewinding of the cut sheet 11.

The final expulsion of the roll 12 formed in the rewinding space 30 is advantageously obtained by an ejector 80 which is provided opposite the rewinding space 30. A forced evacuation of each produced roll 12 is thus obtained thanks to the action of the ejector 80 being for example in the form of an ejection rod. The ejection rods are for example arranged between adjacent pairs of arches, preferably midway between them.

FIG. 4 illustrates a fragment of such an ejection rod 80, which is movable in the direction of the arrow indicated by M towards the rewinding space 30. Preferably, the aforementioned receptacle 4 has a bottom 41 which is practically flat and is arranged in inclination o; opposite to the direction of rewinding G of the outgoing rollers 12. Thanks to this arrangement, the roll is ensured as to its condition, even after the latter has fallen into the bottom of the receptacle, thus preventing the roll from coming apart and turns back into a single sheet.

Preferably, the receptacle is dimensioned sufficiently large so as to be able to receive several rolls if the user has ordered or selected several. To this end, the receptacle also advantageously has a retaining rim 42. In addition, the receptacle 4 is arranged in such a manner with respect to the box 100 of the dispenser that it leaves only a thin interstice 43 allowing just the passage of the roll formed 12 in the presentation area 44 so as to constitute the only area of the dispenser which is accessible to the public. The safety of use of the dispenser is thereby reinforced and any desire of the user to operate inside the dispenser, for example to exchange a supply coil 1 with another or to change the setting of the dispenser, s 'is prevented. In addition, authorized personnel can thus maintain better control over the operation of the distributor for which they are responsible.

The aforementioned drive cylinder 2 cooperates with pressure means 20 arranged practically against these 2, the sheet 11 being advanced between them 2, 20 as illustrated in FIG. 2. The aforementioned pressure means 20 comprise a set of rollers 21 suspended from a locking frame 50 of the device. The rollers 21 are removable relative to the drive cylinder 2 and are rotated in the direction of the arrow indicated by K by the latter 2. The pressure rollers 21 are arranged in pairs, in carriages 23 illustrated in the figure 9, pivotally suspended from a suspension bar 24 fixed in the frame 50. The pressure rollers 21 fit freely against the drive cylinder 2 when the frame 50 is brought into the locking position C, the frame 50 being movable between a raised open position D shown in FIG. 8 and said locking position C illustrated in FIGS. 9, 1 and 2.

Return means 25 are arranged in connection between the head of each pressure carriage 23 and the locking frame 50. The abovementioned return means 25 are intended to bring the rollers 21 against the drive cylinder 2 after each unlocking of the frame 50.

An additional locking member is provided to cooperate with the aforementioned cutting means 90. This 90 is movable from one side to the other 11 ′, respectively 11 ″ of the sheet under the action of a control means 91 triggering the aforementioned additional locking member so as to reinforce the pressure of said rollers 21 against the drive cylinder 2 by wedging the sheet 11 during the sheet cutting operation. additional locking mentioned above, a perfectly clear cut of the sheet 11 is obtained.

To ensure proper routing of the sheet when it leaves the feed reel 1, guide means 40 are provided downstream of the drive means 2 and upstream of the rewinding means 3. Means for reducing the diameter of the roller 12 6 can also be provided. These are represented as such in FIG. 5 and the arrangement of these in the dispenser is illustrated for example in FIG. 6. As illustrated, these 6 comprise several arc elements 60, the curvature of which is significantly more pronounced than that of the aforementioned arches 31, 32. To ensure proper operation of these, the diameter reduction means 6 are arranged inside the rewinding space 30 with the curvature turned towards the above-mentioned upstream arch 31 so as to form a new, more reduced rewinding space 30 ′. Thus a space constraint is imposed on the roller in formation 12 so that after formation, the latter 12 will have a smaller diameter. This is particularly advantageous when sheets of reduced dimensions are selected by the user.

When the diameter of the roller being formed exceeds the threshold permitted by the curvature of the arc element 60 of the diameter reducer 6, the latter disappears behind the downstream arch 32 while being raised to a corresponding level, so that from this moment, it is the curvature of the pair of arches 31, 32 which becomes decisive for the roller in formation 12.

Thus, the initial point of arc R of the arc element 60 is brought into practically coincident geometry projected with the vanishing point P of the first, without the initial point of arc R being able to form an obstacle to the formation of the roller 12. The respective tangents at said points P and R form between them an angle β of at least 135 °. As shown in Figure 5, each aforementioned arc element 60 is arranged in extension of a lever 61 rocking in the direction indicated by arrow L around an axis 62 which is parallel to the supply reel 1. The rocking takes place gradually under the effect of an increase in volume of the roller 12 during formation .

Advantageously, each diameter reducer 6 is arranged in adjustable counterweight 63, the reducer being arranged in abutment on the pivot axis 39 of the arches 31.

The support means of the supply reel 1 comprise a support rod 10 on which are clampably fixed clamping means 13, 14 for each side of the supply reel 1. The aforementioned clamping means consist for example in a pair of clamping cones 13, 14 threaded axially on said support rod 10 with their respective taper and vertices facing one another so as to be embedded in the coil 1 and to ensure a perfectly stable maintenance of the latter 1 during the entire unwinding thereof, from its installation when it is full until it is completely emptied.

Preferably, a damper 7 is provided on the coil as shown in FIG. 6. This can consist of a weight 71 suspended from the chassis of the distributor, so as to rest continuously on the supply coil 1 on the leakage side of this one. The aforementioned weight 71 constitutes a brake for the coil, which makes it possible to prevent the latter 1 from suddenly undergoing an acceleration following the driving action of the driving cylinder 2 with the corresponding rollers 21. This thus reinforces the stability and homogeneity for engaging the sheet leaving the reel 1 to engage the drive means 2, 20.

In an alternative embodiment, the dispenser includes a selector 95 for the length of the sheet 11 to be cut. Said selector 95 can be actuated by the user of the device, in particular the customer of the distribution point where the device is installed. Said selector 95 consists of a coin and / or coin changer. Thus, if the distributor's operator wishes to offer its customers free distribution of paper, it can introduce a token system, so as to render service to its customers while maintaining control over the distribution of paper. The aforementioned length selector can consist of a reserved zone arranged on the front face of presentation of the box of the dispenser 100, for example, a set of numeric keys situated in a reserved zone 98. A display zone 96, for example at liquid crystal, is provided in the same control area located on the front panel of the device which displays the selected length which will be cut. Another display area 97 can also indicate the value of the token and / or of the coins introduced into the dispenser. Another reserved area 99 can also be used to present the user manual.

As still illustrated in FIG. 7, a large control window 94 can advantageously be provided in the box 100 so as to indicate both to the operator and to the user proper whether the device is loaded with paper.

FIG. 7 also also shows a recess 93 usefully made in a practically central zone of the presentation edge 42 of the receptacle 4 allowing the roller 12 'present in the receptacle to be easily grasped by hand. This also allows a precise and delicate apprehension of said roller 12, which is particularly important when it comes to presentation paper of the gift packaging type.

Advantageously, the lateral faces of the box 100 are provided with a slightly projecting edge 49 forming a shoulder allowing a better grip of the distribution box 100 with a view to a possible displacement of the latter.

The dispenser can also further comprise a detection cell 89 for the presence of paper, as well as a stroke detector 88 cooperating with a deflector 87.

Preferably, a coin mechanism and an electronic system are provided, which make it possible to produce small rollers with a maximum diameter of 70 mm and a variable length depending on the price per meter, which has been set by the primary user, that is to say either the installer of the device, or else an authorized person of the distribution point itself, such as a large area, the desired length then being able to be selected by the so-called secondary user, it that is, mainly the customer of the distribution point.

The length distributed depends on the amount of money or tokens introduced into the device. In this regard, the use of tokens makes it possible to provide for free but controlled distribution of paper.

Once the selection has been made by the user, the roller is made in the machine and falls into a receptacle avoiding the user any contact with the moving parts of the device thus ensuring, on the one hand, absolute safety for the user and on the other hand, control for the primary user of the quantity of paper debited, thus ensuring better rationalization of the operation of the device.

The distributor is perfectly adaptable to different widths and diameters of spool cores. It is understood that the distributor described above could perfectly be placed in any place of formation of line with need to make the packaging, in particular in operating sites such as large surfaces, in particular in the shelves caterer. In the latter case, it would be the attendant in the catering departments who would handle the distributor's orders according to the number of small packages or packages to be packed and the size of these. The order could therefore be sequenced so as to obtain in the receptacle a global supply of the number of rolls desired by customer.

If in the above description the dispenser has been described in application of paper rolls, in particular for gift wrapping, it should be understood that the dispenser could apply to all sheets of packaging material, including of a synthetic nature, without departing from the scope of the present invention.

The automatic dispenser described above is therefore intended to deliver, from paper counter reels having a certain rigidity, small rolls of the same width, or if necessary with different widths of a length varying from 1 to 6 meters.

As an example, the paper is of quality 50 to 70 grams per m ² , the widths of 50 to 70 cm and 22 cm of maximum outside diameter.

Claims

1. Apparatus for automatically distributing sheets from a supply reel (1), in particular paper, in particular for gift packaging, comprising:

- support means (10) for maintaining said supply reel in a certain orientation, the latter being unrollable in sheet form (11);

- drive means (2) of said sheet (11) coming from said supply reel (1);

- means for cutting (90) the unwound sheet (11) which can be actuated for a selectable length of cut sheet, characterized in that said automatic dispensing apparatus further comprises rewinding means

(3) of the sheet (11) unwound from the supply reel (1), which (3) are arranged so as to allow rewinding by unit of each sheet

(11) cut in the form of an output roll (12) having said selectable length, in a rewinding space (30) delimited by said rewinding means (3).

2. Automatic dispensing apparatus according to claim 1, characterized in that said rewinding means consist of at least one pair (3) of arches (31, 32) having a certain internal curvature, which are arranged face to face so delimiting a perimeter (33) of substantially continuous and monotonous or progressive curvature around their inner periphery interrupted over at least a small portion of it so as to form a supply gap (34) for the incoming sheet (11) and which can be spread apart at their respective ends under the action of control means (35, 35 '), each pair of arches being arranged in a plane substantially perpendicular to the orientation of the supply coil (1).

3. Apparatus according to the preceding claim, characterized in that said interior perimeter (33) is substantially circular.

4. Automatic dispensing device according to one of claims 2 or 3, characterized in that one of the hoops (31) of each pair (3) is significantly longer than the other hoop (32) of the corresponding pair , each longer arch constituting the upstream arch (31) by receiving the incoming sheet (11) and initiating the rewinding thereof, the shorter arch (32) being located downstream of the longer arch (31).

5. Automatic dispensing apparatus according to the preceding claim, characterized in that the above-mentioned upstream arch (31) has an arc length practically equal to or slightly greater than 180 °.

6. Automatic dispensing apparatus according to any one of claims 2 to 5, characterized in that the hoops (31, 32) of each pair have a common end and are arranged with mutual pivoting, preferably at the height of their common end , between a closed position (A) and an open position

(B), under the action of said control means (35).

7. Automatic dispensing apparatus according to claim 6 when it depends on one of claims 4 or 5, characterized in that the upstream arch (31) is pivotally arranged (H) towards the ground relative to the downstream arch (32) fixed so as to allow an evacuation of the output roller (12) in the open position (B).

8. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that an ejector (80) is provided opposite the above rewinding space (30) so as to allow forced evacuation of each roll produced (12) under the action of the ejector (80).

9. Automatic dispensing device according to claim 8, characterized in that the ejector consists of at least one ejection rod (80) arranged between adjacent pairs (3) of arches and in that it is movable ( M) towards said rewinding space (30).

10. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that a receptacle (4) is provided below said rewinding means (3) so as to receive each roll (12 ') taken out of said rewinding means (3).

11. Automatic dispensing apparatus according to the preceding claim, characterized in that said receptacle (4) has a substantially flat bottom (41) which is oriented substantially parallel to the supply coil (1) in inclination (ot) opposite to the direction rewinding (G) of each aforementioned roller (12).

12. Automatic dispensing device according to one of claims 10 or 11, characterized in that said receptacle (4) constitutes the presentation area of each selected roller (12 ') while constituting the only area of the device which is accessible to the user of the device.

13. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that the aforesaid means for driving the sheet of material (11) comprise a driving cylinder

(2) arranged in rotation (J) on an axis (21 ') parallel to the supply reel (1), between the latter (1) and the rewinding means (3), so as to drive (F) the sheet of material (11) towards the rewinding means

(3), said drive cylinder (2) cooperating with pressure means (20) arranged practically against the drive cylinder (2), said sheet (11) being advanced therebetween (2, 20).

14. Automatic dispensing apparatus according to the preceding claim, characterized in that the pressure means (20) comprise a set of rollers

(21) suspended from a locking frame (50) of the device so as to be removable relative to the drive cylinder (2) and to be able to be driven in rotation (K) by the latter (2), said locking frame (50) being movable between an open position and a locked position (C).

15. Automatic dispensing apparatus according to the preceding claim, characterized in that said pressure rollers (21) are arranged in pairs, in carriages (23) pivotally suspended from a suspension bar (24) fixed in said frame (50 ), so that said pressure rollers (21) can freely adapt against the drive cylinder (2) when the frame (50) is brought into the locking position (C).

16. Automatic dispensing apparatus according to the preceding claim, characterized in that return means (25) are arranged in connection between the head of each pressure carriage (23) and the locking frame (50), which (25) are intended to bring the rollers (21) against the drive cylinder (2) after each unlocking.

17. Automatic dispensing apparatus according to any one of claims 14 to 16, characterized in that an additional locking member is provided to cooperate with said cutting means (90), the latter being displaceable by at least one side (11 ') to the other (11 ") of the sheet (11) under the control of a control means (91), which triggers the aforementioned additional locking member so as to reinforce the pressure of said rollers ( 21) against the drive cylinder (2) by wedging the sheet during the sheet cutting operation.

18. Automatic dispensing device according to any one of the preceding claims, characterized in that guide means (40) of the sheet (11) are provided downstream of the above-mentioned drive means (2) and upstream of the means rewinding (3).

19. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that means for reducing the diameter (6) of the output roller (12) are provided.

20. Automatic dispensing apparatus according to the preceding claim, characterized in that the diameter reduction means (6) comprise at least one arc element (60) of significantly greater curvature pronounced than that of the aforementioned rewinding means (3), which (60) is arranged inside the aforementioned rewinding space (30) with the curvature turned towards the aforementioned upstream arch (31).

21. Automatic dispensing apparatus according to the preceding claim, characterized in that it is provided that when the diameter of the roller being formed exceeds the threshold allowed by the curvature of the arc element (60) of the reduction means above (6), the latter (6) disappears behind the downstream arch (32) itself by being raised to a corresponding level, so that from this moment, it is the curvature of the pair of arches (31, 32) which becomes decisive for the roll in formation.

22. Automatic dispensing apparatus according to the preceding claim, characterized in that the initial point of arc (R) of the arc element (60) is brought into practically coincident geometry projected with the point of flight (P) of the first without the initial point of arc (R) being able to form an obstacle to the formation of the roller.

23. Automatic dispensing apparatus according to the preceding claim, characterized in that the respective tangents to said points (P) and (R) form between them an angle (β) not less than 135 °.

24. Automatic dispensing apparatus according to any one of the preceding claims 20 to 23, characterized in that each aforementioned arc element (60) is arranged in extension of a lever (61) rocking (L) around a axis (62) parallel to the supply coil (1) under the effect of an increase in volume of the roller (12) during rewinding.

25. Automatic dispensing apparatus according to any one of claims 19 to 24, characterized in that each diameter reduction means (6) is arranged in adjustable counterweight (63).

26. Automatic dispensing apparatus according to any one of claims 19 to 25, characterized in that each diameter reduction means (6) is disposed between two rewinding means (3) mutually adjacent in a substantially equidistant manner therebetween .

27. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that said means for supporting the supply reel (1) comprise a support rod (10) on which are means for adjustable adjustment clamping (13,14) for each side of the supply coil (1).

28. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that said clamping means consist of a pair of clamping cones (13, 14) threaded axially on said support rod (10) with their conicities and respective vertices facing each other.

29. Automatic dispensing apparatus according to any one of the preceding claims, characterized in that a damping means (7) of the supply reel (1) is provided.

30. Automatic dispensing device according to the previous claim, characterized in that said damping means consists of a weight (71) suspended

(72) to the chassis of the apparatus so as to rest continuously on the supply coil (1) on the trailing side thereof.

31. Automatic dispensing device according to any one of the preceding claims, characterized in that it further comprises means (95) for selecting the length of the sheet (11) to be cut which can be actuated by the user of the device.

32. Automatic dispensing apparatus according to the preceding claim, characterized in that the selection means (95) consist of a token and / or coin-operated coin mechanism.