ES2335734B1 - MULTIHOJA CORRESPONDENCE FORM AND PROCESSING MACHINE OF THIS FORM. - Google Patents

Abstract

Multi-sheet correspondence form and processing machine of said form.

Multi-sheet correspondence form (1) that it comprises a first sheet (2) having a rear face (4) intended to contain the first page of a text of correspondence, with sections (8) that can be glued. The first sheet (2) comprises, among other features a first folding line (20) and a second folding line (22). He form (1) also includes at least a second sheet (3), intended to contain at least the second page of a text of correspondence, which is narrower than the first sheet (2). He form (1) can be folded by the first and second lines of folded (20, 22) and sealed so that the indivisibility and confidentiality of the content, Moreover, the invention refers to a form processing machine (32) (1) multi-blade correspondence according to the invention.

Description

Multi-sheet correspondence form and processing machine of said form.

Field of the Invention

The invention relates to a form of multi-sheet correspondence comprising a first sheet that it has a back face destined to contain the first page of a correspondence text, and comprising two first zones longitudinal edges provided with first sections capable of be glued; an anterior face opposite to said posterior face intended to contain at least data related to the recipient, which comprises two second longitudinal zones of edge, provided with second sections that can be glued; a first and a second transverse edges; a first line of substantially transverse folding and close to said first edge cross; and a second fold line substantially transverse and that is between said first fold line and said second transverse edge.

The invention also relates to a machine of processing multi-sheet correspondence forms that it comprises a folding zone with at least a first pair of input folding rollers and a second pair of rollers exit folding and a sealing zone with a plurality of sealing rollers arranged at the exit of said folding zone following said second pair of rollers.

State of the art

For an official communication to take effect There is a legal obligation to ensure that the correspondence sent to a recipient is the one that really This one receives. This feature is known as indivisibility. of correspondence.

This warranty obligation is currently only get when correspondence is sent by notarial means, it is say, when a notary certifies that the correspondence entered in an envelope is the one sent to the recipient of the on. This means that this route is used primarily by natural persons or companies that only have to guarantee the occasional indivisibility.

The correspondence of more than one sheet that send from any type of administration, justice, tax, government, etc., does not present this guarantee. The reason for that is found in the large volume of correspondence generated by the administration, the notarial costs that this would have and the deadlines to comply that in most cases implies such correspondence.

It is also known to send letters with acknowledgment of receipt by which it is certified that Correos has delivered to the recipient an envelope. However, in this case Correos no certify the contents of the envelope, that is, the indivisibility.

Alternatively there is the possibility that Post certify with sealed the sheets that are sent. In this case the user goes to a post office with the envelope open, it seal each of the sheets to be sent, close the envelope and in the Certificate documentation indicates the "number of sheets sealed. "There is no cost on certification, but This guarantee is only valid for written communication between natural or legal persons towards the administration, but not between natural or legal persons with each other. In this case, the alternative to the notarial route is communication through a burofax

On the other hand, a system is also known of an acknowledgment of receipt of the multi-sheet correspondence sent to addressee. It is known an envelope that has a sticker as a acknowledgment card on the side of the envelope window. Through the window you can read the destination data indicated in the correspondence, and these can be transcribed (a machine or by hand) on the acknowledgment card. This system or procedure aims to simplify the method of make a traditional acknowledgment card that a Once filled it hooks over the back of the envelope. This prevents the operation of hooking the cardboard and thus avoids the risk of error of cardboard changes when several letters. But it continues without guaranteeing that a letter of one or more is sent Several sheet

From document ES1041028 of the own Applicant is known a correspondence form without envelope for confidential correspondence content. The form does not solves the problem of the indivisibility of correspondence multi blade

Summary of the invention

The object of the invention is to propose a multi-sheet correspondence form that is apt to guarantee validly the indivisibility of multi-sheet correspondence of simple and economical way, that is, without going to the road Notary, as well as the confidentiality of the information contained in the form. This purpose is achieved through a form multi-sheet correspondence of the type indicated at the beginning, characterized in that said form also comprises at least at least a second sheet intended to contain at least the second page of a correspondence text, consecutive to that first page, the width of said second sheet being less than the distance between said first longitudinal zones edge of said first sheet, and being intended to be contained inside said form on said back face, said form being able to present a first fold along of said second fold line facing the rear face on itself, and a second fold along said first folding line facing the remaining section of said face posterior between said first transverse edge and said first fold line with the front face section correspondent.

In the invention the first and second lines of folded do not have to be physically marked on the sheet, but it can also be a linear geometric place where will fold the first sheet in a timely manner. Also worth it comment that the concept of second sheet should be understood as a second type of sheet, that is to say in the form according to the invention there will be one or several second sheets of the same format.

This form has multiple advantages. In First, the text on the first page starts on the page itself first sheet, which ensures continuity between the information regarding the sender and recipient and the content of the letter. On the other hand, the second sheet or sheets, which should be remembered which has been folded inside the first sheet inseparably, contain the consecutive pages of the text, so with that, continuity and indivisibility of correspondence is guaranteed sent. On the other hand, thanks to the folding and sealing with glue, it guarantees the confidentiality of the letter, since you cannot have access to the information contained until the first sheet of the form, destroying the union by tail of the edges of the first sheet. Also thanks to the second sheet u sheets have a width less than the distance between the zones of edges where the glue is applied, it is guaranteed that the second sheets cannot be impregnated with sealing glue and therefore prevent a correct closing of the form. That is the conjunction of technical characteristics have the technical effect of guaranteeing, by on the one hand the indivisibility, and on the other the confidentiality of the form content. This also has the advantage of optimizing the closing points of the form, because thanks to its folding it is essential to have transverse gluing points to the longitudinal direction of the form, that is, parallel to the edges of the first sheet.

Preferably the length of said second sheet is shorter than the length of said first sheet. With it hinders access to the inside sheets of the form through of the first transverse edge of the first sheet, thereby avoiding that someone could try to extract the inner leaves by pulling of them without opening the form.

Especially preferably the length of said second sheet is equal to or less than the distance between said second transverse edge and said first folding line, so it is impossible to extract the sheets interiors without opening the outer sheet beforehand.

Preferably the length between said second transverse edge and said second folding line is the same as the length between said second fold line and said first line folding

Preferably a first tail band is comprised on said rear face substantially throughout the length of said first sections and a second band on said front face at most in the distance between said second transverse edge and said second folding line. This allows to optimize the queue used in the form, without it damage its correct closure.

The invention also raises the problem of simplify the closing of the form as well as the machine with which it should be closed. Therefore, advantageously said first and second tail bands are tail activatable by pressure, and especially preferably by high pressure. With This avoids the need for special folding machines with glue dispensers

Alternatively, said first and second bands glue are wettable glue. This allows to reduce costs in the form, since wettable tails are especially cheap. This type of forms, requires a folding machine with built-in humidification devices.

Alternatively also said first and second bands are applied by glue dispensers previously when folding, provided in the folding machine itself. This reduces costs on the form, but you need a machine that has of glue dispensers.

It may also be convenient for the opening the form is as simple as possible to avoid damaging the inner sheets. Therefore, preferably the form includes a first longitudinal punch that delimits said first two and second longitudinal edge areas.

In an advantageous embodiment said first sheet comprises a second die cut, starting and ending said second die cut at two separate points of said first transverse edge This avoids the need to use forms additional acknowledgment. In one embodiment especially advantageous the second die runs over said first folding line and between said first edge and said first line matches said first die cut. This greatly simplifies the punching the form and on the other hand allows once open the form for the die cut the first sheet is cropped so that its new longitudinal edges and transversal match the edges of the second sheets, facilitating the task of archiving the form in a folder thanks to all the sheets have the same dimensions.

Especially preferably each of these second pages are written on both sides and each one Form pages are numbered with the individual number of page and the total number of pages. This allows to guarantee Optimally form the indivisibility of the form pages.

Moreover, the invention also arises the problem of proposing a machine capable of folding the form according to the invention efficiently and simultaneously guarantee the indivisibility and confidentiality of the content.

This problem is solved by a machine. described at the beginning characterized in that it also includes an area of accumulation with an accumulator of folded sheets suitable for receive a first sheet and at least a second sheet of width less than said first sheet, said said being provided accumulator at the entrance of said folding zone and presenting said accumulator a first width corresponding to the width of said first sheet and a second width centered with respect to said first width corresponding to the width of said second sheet. The accumulator with two differentiated and centered widths one with respect to the other it has the technical effect of arranging the second perfectly centered sheets with respect to the first sheet, and by consequently automatically prevent second sheets hinder the correct closing of the form.

In a preferred embodiment said accumulator comprises adjustment means suitable for modifying said first and second widths, to allow different processing Form dimensions

Advantageously said accumulator further comprises vibrating means suitable for aligning the blades of said form before starting a folding stage. This allows align the sheets correctly, for example, in the event that some inner sheet was slightly off center with respect to the outer sheet of the form, or that for example, one of the second sheets of the form were being supported incorrectly with its edge over the width of the machine corresponding to the first sheet

Advantageously said accumulator comprises a wedge movable between a position of leaf passage in which said wedge is flush or below the main surface of said accumulator, and a folding position in which said wedge protrudes from the main surface of said accumulator to said first pair of folding rollers, said wedge being provided between said first pair of rollers oriented towards the entrance of said folding zone. This wedge makes it easy for all the leaves of the form be dragged simultaneously to the folding area by the pair of input folding rollers.

In a preferred embodiment said accumulator further comprises a drive roller movable between a sheet passing position in which said drive roller is flush or below the main surface of said accumulator, and a drag position in which said roller of drag protrudes from the main surface of said accumulator and is in cooperation with one of the rollers of said first couple of folding rollers, being able to rotate in the opposite direction to the direction of rotation of the corresponding roller, substantially a The same tangential speed. This has the advantage that while the wedge is pushing the set of sheets that forms the Form towards the input folding rollers is guaranteed that the inner sheets of the form enter all together in the folding area and therefore the form can be folded from optimal way.

The machine preferably comprises less a cover suitable for covering said accumulation zones, of folding and sealing that covers visual access to these forms during its processing, thereby guaranteeing confidentiality absolute of the information contained in the form.

Advantageously said accumulator is inclined with respect to the longitudinal direction of the machine. So, thanks to gravity is easily facilitated so that all the leaves are aligned by its bottom edge.

Brief description of the drawings

Other advantages and features of the invention they are appreciated from the following description, in which, without no limiting character, a preferred mode of embodiment of the invention, mentioning the drawings that are accompany. The figures show:

Figs. 1A and 1B, a front view of the faces, respectively, posterior and anterior of a first sheet of the form according to the invention.

Fig. 2, a perspective view of the form according to the invention prior to folding.

Figs. 3A to 3C, a folding sequence of the form according to the invention.

Fig. 4A and 4B, a front view of the faces, respectively, posterior and anterior of a second form of completion of the first sheet of the form according to the invention.

Fig. 5 a cut schematic view longitudinally of a first embodiment of the machine according to the invention.

Fig. 6, a partial cross section schematic of the machine's accumulator along the line VI-VI of Figure 5.

Detailed description of an embodiment of the invention

The figures show a form of preferred completion of multi-sheet correspondence form 1 according to the invention. Form 1 comprises a first sheet 2 whose rear face 4 or reverse can be seen in figure 1A and whose previous 10 or obverse can be seen in figure 1B. The first sheet 2 is delimited by a first and a second transverse edges 16, 18 and a first and second longitudinal edges 15.17.

The first sheet 2 has a first line 20 of transverse folding, close to the first transverse edge 16 and a second cross fold line 22 between the first line 20 and the second transverse edge 18.

The rear face 4, which is intended for contain the text corresponds to the first written page of the Form 1, presents two first 6 longitudinal border areas with a first 8 sections susceptible to being glued. In In particular, on these first sections 8 a first is planned tail band 24 that extends substantially over the entire length from the first sheet 2.

The front face 10 of the first sheet 2 is intended to contain, among others, the recipient's data and optionally from the sender. This face 10 also features two second 12 longitudinal edge zones with second sections 14 liable to be glued In this case, the second band 26 of tail extends only partially in the distance between said second transverse edge 18 and said second line 22 of creased. As is clear from this configuration, the Sender data cannot be separated from the content of the first communication page, whereby the person receiving the letter cannot say that its content is different from the one written in the first page.

The first and second tail bands 24, 26 are preferably constituted by queues provided on the first sheet 2 which are activated by pressure after the folding stage of the form 1. However, within the scope of the invention is provided that the tail bands 24, 26 are, for example, tail wettable For this, the folding machine must have a water dosing device on the tail bands wettable.

In Figures 1A and 1B it can also be seen that the first sheet 2 has a first longitudinal die cut 28 separates the first and second zones 6, 12 of the central body of the sheet 2. As will be seen later, this first die cut 28 It facilitates the opening of form 1 in a simple way.

The first sheet 2 also presents a second 30 rectangular die cut as a card in the area covered between the first transverse edge 16 and the first line 20 of creased. This second die cut 30 serves as an acknowledgment card for receipt, simplifying its use with respect to the prior art.

As seen in Figure 2, form 1, it comprises at least a second sheet 3 whose width is smaller at the distance between the first 6 longitudinal zones and that is intended to contain at least the second page of the Correspondence text. In this way, it is guaranteed that at fold form 1 with one or several second sheets 3 on its inside, these second sheets 3 do not cover the tail bands 24, 26, preventing a correct closing of the form 1. It is also guarantees the continuity of the text of the first page of the form, and therefore the indivisibility of the information contained. On the other hand, preferably the length of the second sheet 3 is less than the length of first sheet 2, and of especially preferred the length of the second sheet 3 is equal to or less than the distance between the second edge transverse 18 and the first folding line 20. Preferably the First sheet 2 has dimensions of 250 x 420 mm, while that the second sheet is a standard DIN A4 format (210 x 297 mm) and It is printed on both sides if the form contains more of two pages of text and also each page of the form 1 are numbered with the individual page number and number total pages

In figures 3A to 3C it is shown schematic the folding of the form 1 according to the invention. How I know you will see later in the description, the stages shown here, will performed on machine 32 according to the invention.

First, based on the situation shown in Figure 2, a first sheet 2 is arranged and on its rear face 4, one or several second sheets 3 are placed centered on the delimited space between the first zones 6. At this time, See figure 3A, a first folding of the entire form 1 is carried out along the second folding line 22 of the first sheet 2, so that the rear face 4 faces on itself, evidently containing the second inner sheets 3 , that is, a symmetrical fold of the second sheets 3 is made, so that the length between the second transverse edge 18 and the second fold line 22 of the first sheet 2 is equal to the length between the second fold line 22 and the first fold line 20. Next, see figure 3B, a second fold is made along the first line 20 in which the rear face section 4 between the first transverse edge 16 and the first fold line 20 is faced, with the section of corresponding front face 10, that is the front face section comprised between the second transverse edge 18 and the second line 22 of
creased.

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After the folding stage, being the tail bands 24, 26, configured as tail bands to pressure, it is enough to exert pressure on the respective longitudinal edge areas 6, 12, so that the tail of the bands 24, 26 act and form 1 is perfectly closed.

In Figures 4A and 4B a second is seen embodiment of the first sheet 2 of form 1 with two differentiating elements regarding the first form of realization. First, the second die cut 30 coincides with the first fold line 20 and its side edges coincide with the first die cut 28. Thus, the acknowledgment card is You can start simply, and after opening the form by the first and second die cut 28, 30, all the leaves of the Letter have the same format.

The second important difference is that in this case the form 1 does not include a priori the tail bands 24, 26. This form 1 is intended to be glued on the form's own processing machine, under the condition that it is provided with suitable gluing devices.

In figures 5 and 6 it can be seen schematically a first embodiment of the machine 32 of processing of multi-sheet correspondence forms 1 according to the invention. This machine 32 allows the form 1 to be folded automated guaranteeing on the one hand indivisibility and on the other side confidentiality.

In Figure 5, it is appreciated that the machine 32 it comprises from left to right, an accumulation zone 44, a folding zone 34, a sealing zone 40 and finally a zone of collection 66 in which the machine 32 deposits the forms 1 folded and sealed.

Moreover, on the left side of the Figure 5, a broken line is shown schematically printer 64 attachable to input 45 of machine 32. Optionally, the machine 34 itself can comprise the printer 64.

The accumulation zone 44 comprises a accumulator 46 of folded sheets provided at the entrance and below of the folding area 34, inclined with respect to the direction longitudinal of the machine 32, whose structure can be seen in detail in figure 6. The inclination of the accumulator 46 facilitates the correct positioning of the sheets. The accumulator 46 has a first width 48 suitable for receiving the first sheet 2, and a second width 50 suitable for receiving a plurality of seconds sheets 3. In the embodiment shown in the figures, the printer prints first the second sheets 3, leaving the second page of correspondence text facing up and finally the first sheet 2, depositing it with its back side 4, which contains the first page of the text, oriented towards down, that is, towards the main surface 58 of the accumulator 56. In other words, thanks to that, in a simple way, it is guaranteed that there is no visual access to the information written on the form 1, as well as continuity in the pages of the text and therefore Your indivisibility. As will be seen later, a cover 62 which allows to further increase the protection of the information. Alternatively, the print order or layout of the sheets of form 1 in accumulator 46 could be at reverse, that is, that the first sheet 2 was in the part low accumulator 46, while the rest of second sheets 3 are found on the first sheet 2. Moreover, in a form of preferred embodiment, the machine 32 provides adjustment means such as a toothed rack associated with gears in solidarity with the first and second walls 49, 51 that delimit the first and second widths 48, 50 that allow varying symmetrically the width of the accumulator 46 with respect to the housing 52, in the direction of the double arrows of Figure 6, for facilitate the processing of forms 1 of different widths.

The accumulator 46 also comprises means vibrators 54 responsible for perfectly aligning the leaves of the Form 1 before starting the folding stage.

In the folding zone 34, it can be seen that in this embodiment the machine 34 comprises a first pair of folding rollers 36 corresponding to the entrance of the area of folding and a second pair of folding rollers 38 corresponding to the output, arranged above the accumulator 46.

The accumulator 46 also comprises a wedge 56 responsible for entering form 1 in the folding area 34. In particular, wedge 56 is between the first pair of rollers 36. This has a position of passage of the leaves, during the accumulation of sheets of form 1, in which is flush with the main surface 58 of accumulator 46, and a folding position (shown in dashed lines in the figure 5), in which, when all sheets 2, 3 that configure the Form 1 are prepared and aligned, protrudes from the main surface 58 and push form 1 against the first pair of folding rollers 36.

On the other hand, to prevent the latter sheets 3 of form 1 move or de-center with respect to the first sheet 2, the accumulator 46 also comprises a roller of drag 60. As in the case of wedge 56, the roller drag 60 is movable between a step position where it is flush with the main surface 58, and a drag position (shown in dashed lines in Figure 5), in which it protrudes from main surface 58 and compress form 1 against one of the rollers of the first pair of folding rollers 36, being able to rotate in the opposite direction to the latter and with the same tangential speed This speed synchronization Tangential prevents the second leaves 3 from moving relative to the first sheet 2 and therefore an optimal folding is achieved.

It should be noted that according to an embodiment alternative not shown in the figures, the folding zone 34 and of sealed 40, can be arranged below the accumulator 46.

For greater security in the confidentiality of the information contained in form 1 machine 32 can have a cover 62 covering the accumulation zones 44, of folding 34 and sealing 40, so that access cannot be accessed visual to the information during the processing of the form 1. This cover 62 may alternatively consist of differentiated covers for each of the zones.

Machine 34 of Figures 5, 6 operates from the as follows: the printer 64 first prints a plurality of second sheets 3 that it is gradually depositing on the accumulator 46. The screen 68 prevents the sheets from being able to Contact the folding rollers. When you have finished print the second sheets 3, print the first sheet 2 and the place on the accumulator 46 with the rear face 4 facing down. A sensor not shown in the figures detects that the first sheet 2 has already been deposited on the accumulator 46 and the control of the machine 34 activates the vibrator means 54 to align the leaves optimally.

Once this stage is finished, the rollers folding start turning and wedge 56 and the drag roller 60 move from the initial step position to the respective positions of folding and dragging. Figure 6 shows the intermediate situation in which wedge 56 is moving towards the first pair of folding rollers 36. When form 1 contacts these folding rollers, pushed by wedge 56 is dragged ascending and introduced in guide 70. Thanks to this, it is performed a first fold in form 1 along the first line of folding 20. Form 1 continues ascending by guide 70 pushed by the first pair of folding rollers 36, until bump into cap 72, due to which form 1 cannot keep moving forward However, the opposite end of form 1, that is, the area of the first sheet 2 between the first transverse edge 16 and the first line 20, enters the second pair of folding rollers 38 which perform a second folded along the first fold line 20, thus closing Form 1 as shown in Figure 3C.

At the exit of the folding zone 34, the form enters sealing zone 40, in which the form enter with the first fold line 20 in front, and both pairs of sealing rollers exert compression on the first and second zones 6, 12 of form 1. Due to this compression the pressure-activated tail bands 24, 26 enter contact and form 1 closes.

Finally, at the exit of the sealing zone 40, the exit sealing rollers deposit form 1 folded in the collection area.

As you can see from this description, the machine according to the invention allows to process a multi-sheet form guaranteeing on the one hand the indivisibility of the content of the form, as well as your confidentiality in a simple and especially economical, thus overcoming the inconveniences described in the state of the art.

Claims (16)

1. Multi-sheet correspondence form (1) that understands [a] a first sheet (2) presenting

[i]

a rear face (4) intended to contain the first page of a correspondence text, and comprising two first longitudinal edge zones (6) provided with first sections (8) that can be glued;

[ii]

an anterior face (10) opposite to said face later (4) intended to contain at least related data with the recipient, which includes two second zones (12) longitudinal edges, provided with second sections (14) liable to be glued;

[iii]

a first and a second transverse edges (16,18);

[iv]

a first fold line (20) substantially transverse and close to said first transverse edge (16); Y

[v]

a second fold line (22) substantially transverse and which is between said first line (20) of folded and said second transverse edge (18),

characterized in that said form also comprises [b] at least one second sheet (3) intended to contain at least the second page of a text of correspondence, consecutive to said first page,

[i]

the width of said second sheet (3) being lower at the distance between said first zones (6) longitudinal edges of said first sheet (3), and being intended to be contained within said form (1) on said rear face (4),

[c] said form (1) being suitable for presenting a first fold along said second line (22) folding facing the back side (4) on itself, and a second fold along said first fold line (20) facing the remaining section of said rear face (4) between said first transverse edge (16) and said first fold line (20) with the front face section (10) correspondent.

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2. Form according to claim 1, characterized in that the length of said second sheet (3) is less than the length of said first sheet (2). 3. Form according to claim 2, characterized in that the length of said second sheet (3) is equal to or less than the distance between said second transverse edge (18) and said first folding line (20). 4. Form according to any one of claims 1 to 3, characterized in that a first band (24) of glue is comprised on said rear face (4) substantially over the entire length of said first sections (8) and a second band (26) on said front face (10) at most in the distance between said second transverse edge (18) and said second folding line (22). 5. Form according to claim 4, characterized in that said first and second tail bands (24, 26) are pressure activated glue. 6. Form according to claim 4, characterized in that said first and second bands (24, 26) of glue are of wettable glue. 7. Form according to any one of claims 1 to 6, characterized in that it comprises a first longitudinal die cut (28) delimiting said first two and second longitudinal edge areas (6.12). Form according to any one of claims 1 to 7, characterized in that said first sheet (2) comprises a second die cut (30), starting and finishing said second die cut (30) at two separate points of said first transverse edge (16). 9. Form according to claim 8, characterized in that said second die cut (30) runs on said first fold line (20) and between said first edge (16) and said first line (20) coincides with said first die cut (28).

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10. Form according to any one of claims 1 to 9, characterized in that each of said second sheets (3) is written on both sides and each page of the form (1) is numbered with the individual page number and the total number of pages. 11. Multi-sheet correspondence form processing machine comprising a folding zone (34) with at least one first pair of input folding rollers (36) and a second pair of exit folding rollers (38) and a sealing zone (40) with a plurality of sealing rollers (42) disposed at the exit of said folding zone (34) following said second pair of folding rollers (38), characterized in that it further comprises an accumulation zone (44) with an accumulator (46) of folded sheets suitable for receiving a first sheet (2) and at least a second sheet (3} of width smaller than said first sheet (2), said accumulator being provided (46) at the entrance of said folding zone (34) and said accumulator (46) presenting a first width (48) corresponding to the width of said first sheet (2) and a second width (50) centered with respect to said first width (48 ) corresponding to the width of said second sheet (3) . 12. Machine according to claim 11, characterized in that said accumulator (46) comprises adjustment means suitable for modifying said first and second widths (48, 50). 13. Machine according to claim 11 or 12, characterized in that said accumulator (46) further comprises vibrating means (54) capable of aligning the sheets (2, 3) of said form (1) before starting a folding step. 14. Machine according to any of claims 11 to 13, characterized in that said accumulator (46) comprises a wedge (56) movable between a leaf-passing position in which said wedge is flush or below the main surface (58) of said accumulator (46), and a folding position in which said wedge (56) protrudes from the main surface (58) of said accumulator (46) to said first pair of folding rollers (36), said wedge ( 56) provided between said first pair of folding rollers (36) oriented towards the entrance of said folding zone (34). 15. Machine according to any of claims 11 to 14, characterized in that said accumulator (46) further comprises a drive roller (60) movable between a leaf-passing position in which said drive roller (60) is flush or by below the main surface (58) of said accumulator, and a drag position in which said drag roller (60) protrudes from the main surface (58) of said accumulator (46) and is in cooperation with one of the rollers of said first pair of folding rollers (36), being able to rotate in the opposite direction to the direction of rotation of the corresponding roller, substantially at the same tangential speed. 16. Machine according to any of claims 11 to 15, characterized in that it comprises at least one cover (62) suitable for covering said accumulation (44), folding (34) and sealing (40) areas that cover the visual access to said form (1) during its processing.