ES2247497T3 - BLOCK OF CONDITIONED ENVELOPES, PROCEDURE AND DEVICE ADAPTED FOR SUCH CONDITIONING. - Google Patents

Abstract

The envelopes (3) are held between two rigid spacers (5, 7) at either end of the block (1). A wrapping (11, 110) is provided around the envelopes and spacers in order to hold them together. Independent claims are also included for the following: (1) Combination of the envelope blocks, a pallet and a stretch film for holding the blocks on top of the pallet; (2) Method for unwrapping the envelope blocks by removing a single piece of the wrapping, then removing the spacers and then loading the envelopes into a machine; (3) Machine for wrapping envelopes, comprising a pincer with jaws for gripping the envelopes and spacers and a device for tying a wrapping around them; and (4) Method for wrapping the envelopes using this machine.

Description

Block of conditioned envelopes, procedure and device adapted for said conditioning.

The present invention relates to conditioning and deconditioning of envelopes.

In the present invention, they are called "envelopes", to all bags or paper bags, including cardboard intended to receive a letter, some brochures or even any other object that may be contained in them. In general, an envelope is considered by specialists in matter as a "flat product" and this term is frequently used In the present case, the term applies "on" which presents more or less, according to its structuring, a certain flexibility that makes particularly low effort (for example, induced by a series of envelopes arranged about behind the others, back to back), a deformation appears generated by the different thicknesses that exist in different points of each envelope.

In this context, the document EP-A-0 591 099 unveils a machine to surround blocks of envelopes with one or more bands clamping The document US-A-4,817,260 describes a machine for the deconditioning of blocks of envelopes held by elastic bands. The invention proposes:

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a block of conditioned envelopes that have stability and / or an improved flatness,

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a set of blocks of envelopes conditioned on a pallet of maintenance under improved conditions of support and / or stability and / or block placement for a future deconditioning easier,

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a procedure for deconditioning an envelope block allowing to improve the loading conditions of a charger of a envelope treatment machine (for example a machine insertion), and

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a machine to seal a series of conditioned envelopes according with the invention,

-

a procedure for conditioning in this way said series of envelopes.

Regarding the first aspect (block of conditioned envelopes), the invention proposes a solution to problems of flatness failures of a series of envelopes arranged one behind the other and / or the non-adaptation of the typical packaging in cardboard boxes, in particular with a reduction in waste volumes and a decrease in  the times of the operators who must prepare the envelopes, for example in a magazine of an insertion machine. In this regard, it should be noted that improving the conditioning of a series of envelopes can induce a noticeable gain in the burden of envelope treatment machines, all the more so than before be treated by those machines, the envelopes must be unconditioned There is therefore a real synergy between the conditioning, deconditioning and treatment back of those envelopes.

In this framework, an important feature of the invention therefore advises the use of a block of conditioned envelopes comprising:

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a series of envelopes that have a front surface on which an envelope closure tab, a back surface and a song, the envelopes being arranged facing each other, by one and / or other of the front and rear surfaces,

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nail rigid coves arranged on both sides of said series of envelopes, in front of the front face or the back face of the first and last of the envelopes of the series, and

-

a fastening means of the series of envelopes that closely surrounds the series of envelopes and the two rigid coves.

According to another feature of the invention, the fastening means is advantageously elastically deformable, outside of the tension exerted on it, and surrounds in elastic state the series of envelopes and rigid coves.

This solution is preferred to a strapping band. not elastic

Indeed, with an elastically deformable medium, you can in particular absorb, in time, an eventual decrease in the volume of the envelope series. It can happen in effect that after conditioning, the air trapped between the envelopes during said conditioning can be evacuated progressively and after a certain period of time "contraction" of the volume occupied by the series of envelopes.

As the preferred technical solution for absorption of said eventual decrease in volume, it is advised that the medium clamping comprises a stretch film of plastic material, used in its elastic state.

To favor the use of the block of conditioned envelopes and in particular save time by operator, taking another advantage of the use of a stretch film, Another feature of the invention recommends that rigid coves  and the holding film of the envelope series be transparent, or that the film and / or the coves are provided with a means of signaling to provide the user with the envelope block conditioned a reference in the space of the envelopes, which they are then, in the series, all oriented in the same way.

In relation to the above, a problem that resolves the invention refers precisely to the requirement of a correct orientation of each block of envelopes in conjunction with, in particular, the arrangement of this block on the charger of a envelope treatment machine, particularly if it is not of sachets but rectangular envelopes with closure tab located on one of the major lengths of the envelope. In this case, the solution widely recommended by the invention consists in which, within the series of envelopes:

to)

everybody the envelopes are oriented identically, surrounding the middle of hold the envelopes, separate from the closing tab, and

b)

there is a signal of the orientation of the envelopes, including the position of the tab closing:

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due at an ability to visually detect this orientation through of the clamping means and one of the coves, and / or

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by means of signaling means that identify this orientation and that are provided on the clamping means and / or over at least one of the coves.

As already indicated, the invention has been interested on the other hand in the conditions of maintenance of Envelope blocks conditioned in this way.

Another aspect of the invention relates to the way of preparing the maintenance of a series of blocks of envelopes conditioned on a pallet, ensuring good stability conditions, without particular risks of deterioration of the envelopes, even favoring the work of the operators for a faster and safer presentation of the blocks of envelopes with a view to their deconditioning and their placement in the loader of the treatment machine
to.

For this fact, a characteristic of the The invention refers to a set comprising:

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a series of blocks of conditioned envelopes such as those presented previously,

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a handling pallet on which several blocks of envelopes rest conditioned, arranged at least for some with a section of edge of the envelopes and the coves of said blocks in front of a upper support surface of the pallet,

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and a coating medium for pallet and envelope block series arranged on it, said covering means comprising a stretchable elastic film, stretched in its deformation zone elastic.

Advantageously, according to one characteristic complementary:

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the series of blocks of conditioned envelopes will be distributed in several overlapping layers,

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a interleaver will be interposed at least between some of the layers,

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to the least some of the envelope blocks present in this case, in the within the series of envelopes, surface irregularities at a upper and / or lower level of the block, due to tolerances of manufacturing.

Moreover, according to another characteristic, alternative or complementary to the previous one, it is advised that in the place of the first level of envelope block located immediately above the pallet, the blocks of envelopes in question rest on a solid support surface, not openwork, by means of this of at least one intermediate sheet and / or of an upper surface solid horizontal pallet.

Another inventive aspect, which can be independent of the previous one, therefore refers to a procedure for deconditioning said block of envelopes.

A problem that solves the procedure of the invention is that of the opening of the tight clamping means, preventing its removal from damaging the envelopes or altering its good placement, for example moving them.

A solution proposed by the invention consists of in which to decondition the block (s) of envelopes:

to)

be has at least one of said envelope blocks in a magazine of an envelope treatment machine,

b)

with before or after stage a), is removed in one piece the clamping means that press the series until then of envelopes and rigid coves, without breaking that means of clamping, and rigid coves are also removed,

C)

then the machine is fed envelope treatment with this series of envelopes Unconditioned, arranged in the charger.

In particular if the clamping means is elastically deformable, it is recommended, to remove this means of clamping and / or rigid coves against a series of envelopes conditioned, separate the clamping means and / or rigid coves with respect to said series of envelopes, however maintaining in that moment the clamping means and / or the rigid coves facing the front and back surfaces of the envelopes that face it, then remove the clamping means and / or rigid plates, by relative transverse displacement, at a distance these surfaces, between the series of envelopes and said coves and / or the medium clamping

Another inventive aspect yet, which can be also independent of the previous one, it refers to a machine for cover the envelopes and their rigid coves.

To do this, it is advisable to use a machine that understands:

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nail clamps with jaws to tighten the series of envelopes and coves  rigid, and

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some means to arrange, tight around them, a means of securing the series of envelopes and rigid coves, being provided said fastening means, at the time of placement, around the series of envelopes, rigid coves and clamp jaws.

Preferably at least some of the jaws of the clamp will be provided with a surface that has a power sliding with respect to the rigid coves and / or the clamping means, to facilitate its removal after the placement of this medium of subjection around the coves and the series of envelopes.

Conditioning envelopes and coves in this way Rigid allows reliable, fast and poor conditioning expensive, in particular in conjunction with the use of a means of elastically deformable support.

According to another inventive feature of the invention, in conjunction with the machine just presented, is therefore advises to condition the series by coating From envelopes and rigid coves proceed as follows:

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be it has the series of envelopes and the rigid coves between the jaws of a clamp,

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be squeeze the jaws to bring the rigid coves close to each other among which the series of envelopes is interposed,

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be surround the series of envelopes, rigid coves and jaws with a tight clamping means of the coves and the series of envelopes,

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be loosen the caliper jaws, and

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be remove the series of envelopes and the coves surrounded from this clamp by means of tight grip.

This solution is particularly interesting. when a film is used as a fastening means stretchable, facilitating its elasticity the removal of envelopes and the conditioned coves, away from the jaws of the gripper.

A further description will be given below. detailed of the invention with reference to the attached drawings given only as examples and in which:

- Figures 1 and 2 show two solutions of conditioning of a batch of envelopes, according to the invention,

- Figure 3 shows, on a smaller scale, a batch of envelopes that are being conditioned by a sealing machine,

- Figure 4 is an enlarged view of a detail of figure 3,

- Figure 5 shows a handling pallet massif filled by a series of blocks of conditioned envelopes, with an enlarged detail of a block of envelopes of which some stand out,

- Figure 6 shows an alternative of embodiment of figure 5,

- Figures 7, 8, 9, 10 show four stages following an automated deconditioning of a block of envelopes, and

- Figures 11, 12, 13 show three stages successive of an alternative embodiment of a deconditioning of this type.

In Figure 1, a block 1 of envelopes is observed conditioned. This block, or set, comprises a succession of envelopes 3 and rigid coves 5, 7 between which it is arranged and kept the batch of envelopes 3.

Within this series, all envelopes are, in the image of the one with reference 3a that has been extracted from lot, preferably, arranged and oriented in the same way. They are therefore, for an intermediate envelope such as envelope 3, two to two in contact back to back, or by its surface front 30a, or by its rear surface 30b.

The clamping coils of the envelope series are advantageously constituted by two solid rigid plates, rectangular, for example flat plates of plastic material transparent, whose dimensions are those of envelopes, which they are in this case all of the same dimensions and are placed with its closure tab 9 located identically in all lot envelopes. Tab 9, if folded over a part of the front surface 30a, is not closed (i.e. it is not attached to the body of the envelope since envelopes 3 of the lot considered have not been filled yet).

Although the solution seems less appropriate, taking into account the multiple possible deformations of the envelopes in the batch, particularly in the case of flexible, slightly rigid envelopes, such as unfinished envelopes, one and / or the other of the end coves 5, 7, could (n) be constituted by means other than a plate, such as for example
a frame, with or without central crosshead to ensure the flatness of the envelopes, in the central part of its surfaces.

You could also provide some plates naturally curved, quite thin, that would reach a state flat under the tension of the tightening means.

Around the envelopes of the lot and the coves 5, 7, a means 11 for keeping the envelopes tight is provided of the batch

This band 11 closely surrounds the envelopes and the plates.

It will be noted that the envelopes are rectangular. Each one has a thin edge 13 with, along this edge, two opposite sides of shorter length l and two opposite sides of longer length L. The same is true for plates 5, 7.

The tight holding means 11 passes along the two opposite lengths of shorter length l of the envelopes and the coves 5, 7 and advantageously extends along the length l of the envelopes and the two coves.

Thus, once a batch of envelopes of this type rests on a support support of each lower section of greater length L , it is blocked laterally by means 11 and is prevented, both frontally and dorsally, from arching, by the presence of the coves 5, 7.

To maintain the most effective pressure over time on the batch of envelopes, the securing means 11 consists, in the Figure 1, on a stretch film of a plastic material, such Like a polyethylene film.

It is therefore here a means elastically deformable that, once placed tight around of the batch of envelopes and the coves 5, 7, it is still in its state elastically deformable, so that if the batch of envelopes lose volume, absorb this "contraction" and continue exerting a pressure of pressure on the batch of Envelopes and end coves.

Eventually, instead, it could have been envisage replacing the elastically deformable means 11 with a belt or thicker tape, not elastically deformable 110, which it would have simply tightened around the batch of envelopes and the coves 5, 7, at the time of the original conditioning (figure 2).

In figure 2 at least the cove 5 is transparent. Preferably, tape 110 is also. operator can thus discern through cove 5 and part of the tape 110 covering it, the position of the closure tab 9 and check if block 1 is oriented correctly, particularly for optimized placement on the Loader of an envelope insertion machine.

In figure 1, it has been imagined that neither the coves extreme 5, 7, or sealing 11 allowed to locate the tabs 9 through them. This also provides a means of signaling 12. In the example, it is a directed arrow down and printed on an area of the clamping means 11 that is  extends in front of the outer surface of cove 5 to indicate that the closing tab faces the cove 5 along its longer length (on the other hand in the image of the situation of tab 9 that can be seen by transparency in figure 2). In another solution, signaling could be arranged on at least one of the coves.

Figure 3 shows a placement solution of a stretchable plastic film 11 around the batch of envelopes 3 and of the end coves 5, 7.

The machine 10 for conditioning the assembly 1 such as illustrated in figure 2, it comprises a sealing machine 15 in the that a roll of stretch film 111 is stored which, once wrapped as indicated around the coves 7, 5, and of the batch of envelopes 3, constitutes the seal 11, after the rupture of the band 111 in an appropriate place, for example by means of a hot knife (not shown). For the tensioning of stretchable film 11, a (not shown) tensile system ensures a stretch in the elastic zone of the terminal part of the band 111.

As illustrated, the coves 5, 7 and the batch of Envelopes 3 are arranged in the center of the film roll and are supported by clamp 17 (of which the union with the rest of the machine, for simplicity purposes).

The clamp comprises an upper jaw 19 that in this case it comprises two platelets 21a, 21b and a lower jaw 23 constituted identically.

The two jaws are mobile one respect to the another in translation by means of a piston system 25 for press in the direction of the arrows in figure 4.

It will be noted that the tightening platelets of the jaws, such as 21a, 21b, get in the way of sealed between outer band 11 and rigid coves 5, 7 (see in particular figure 3).

After tensioning the stretch film and the separation of the band 11 from the rest of the roll 111, is proceeds to the removal of the set 1 conditioning. To do this, the surfaces of all or part of the jaws 19, 23, are preferably coated with a sliding liner 27 (for example a Teflon® coating). The lining may be located on the upper and lower faces of the platelets such like the 21st and 21b. After removal out of machine 10, the block of envelopes 1 of figure 1 is obtained on which distinguishes in 29 the welding zone in which the band is closed about itself and from which it has been separated from the rest of the roll 111 of figure 3.

Figure 5 shows a set of blocks of conditioned envelopes such as 1, 20, 30, 40 and arranged, in adjacent batteries, on a handling pallet 31.

The different blocks such as 20, 30, are identical to block 1 of figure 1 and are each arranged the same way as in figure 1, that is to say with a seal on the side walls, in the sense of height, with the edges upper and lower free, resting a portion of the song lower length L of envelopes and coves, or on an identical lower block, or, for the block located more below, directly on the upper surface 32 of the pallet.

In a certain number of situations, some envelopes (such as 300) of a block of conditioned envelopes they may be displaced in the sense of height, as shows the enlarged view to the right of this same figure 5. More exactly, the blocks can present, within the series of envelopes, surface irregularities at the upper level and lower block due to manufacturing tolerances.

To avoid these consecutive problems to this situation, intermediate sheets such as 33 are interposed to less at certain levels of the conditioned envelope blocks extending individually on a surface greater than the upper or lower surface S of a single block. Thickness and The flexibility of these interleaved (typically paper) are such that the flatness between the levels of the stacked blocks, recovering the irregularities created by those displacements in height of certain envelopes in a block, without this will damage the envelopes (understanding that the displacement is typically little pronounced).

At the lowest point of the batteries, the blocks of conditioned envelopes, such as block 40 in Figure 5, they rest on a solid base 32 that constitutes the surface upper pallet 31.

As an alternative, you can expect to replace this solid base 32 by an openwork partition 37 that forms the upper base of pallet 39 of figure 6, with the interposition of a series of intermediate sheets 35, which, like intermediate sheets 33, have each one upper surface on each individual surface S of a block of conditioned envelopes, and which are interposed, edge against edge or with a slight ride, between the different blocks of conditioned envelopes of the lowest level of the batteries and the discontinuous upper surface of the pallet.

In Figure 6, all block piles conditioners are represented coated by a film stretchable clamping 45.

In figures 7 to 10, a first means is shown of deconditioning of the block of envelopes 1, according to several stages of application.

In these figures, as on the other hand in the following figures 11 to 13, the deconditioning device presented will allow to remove the clamping means 11, without breaking it, thus avoiding eventually damaging the envelopes or altering the set relatively compact that these form.

In figure 7, the device deconditioning 50 comprises a pusher 51 mounted on a jack 53 supported by a frame 55 of which two opposite arms 57, 59, have rods 61a, 61b, 61c, 61d, moving apart relative, two to two, to constitute a means of widening controlled from band 11, to ensure its withdrawal, as You can see in figure 9.

Preferably, the separation means 61a, ...., 61d, are intended to act on the clamping means 11 at the point of the end coves 5, 7, thus avoiding interfere with envelopes, with the risk of damaging them or disturbing its maintenance as a uniform and correctly placed block.

It should be noted that in the hypothesis that one or several hoops, as in figure 2, replaced the bank of sealed with elastically deformable means 11, the invention strongly advises to decondition the envelope block from at least one area located at the point of the end coves 5, 7, that is, apart from the envelopes, particularly by Same reasons as the previous ones.

In Figure 7, the separation stems 61a, ..., 61d are mounted on guides 63a, 63b, 63c, 63d, which are located at the level of the longitudinal ends of the coves of end 5, 7 respectively.

On the height (small length l ) of each of the coves, at the longitudinal ends, open grooves 65a, 65b, 65c, 65d, allow the stems 61a, ..., 61d, to act on the clamping means 11 , by introduction inside the open slots, as shown in Figure 7.

In this position, the frame assembly 55 with the stems 61a, ...., 61d, has been approached to the block of envelopes 1 conditioned and pusher 61 is leaning against the common edge of longer length L of the envelope block assembly and of the two end coves 5, 7, so that you apply them, under the effect of cat 53, against its opposite support surface 67 (action on the direction of arrow 69 in figure 8). The surface 67 can constitute the bottom of a magazine of an insertion machine envelopes.

In this position, the separation rods 61a, ...., 61d, are in a "retracted" position, at the end rear of its guide (respectively 63a, ...., 63d).

The stretchable clamping means 11 is not overestimated.

On the contrary in figure 9, the device 50 is in the same position as in Figure 8, except for spindles 61a, ...., 61d, which are currently in "active" position, out of open slots 65a, ...., 65d to push the stretchable medium 11 apart from the edge of the two opposite sides of the shortest length of the batch of envelopes (in the case present, stretching the film 11 according to the two opposite directions 71a, 71b, according to the same address).

Then you just have to lift the whole frame 55, therefore including stems 61a, 61b, ... which they then hold the stretchable tape 11 while holding applied on its support surface 67 the batch of envelopes 3 and the cleats 5, 7, by means of pusher 51 and rod deployment of jack 53 in the direction of direction 72 (see figure 10).

It only remains to remove the two end coves 5, 7.

In Figures 11, 12, 13, a variant embodiment of the deconditioning device 70. It is distinguished from device 50 by the direction of the slots 73a, 73b, 73c, 73d through which the stems of separation 61a, ...., 61d (specifying that in this figure, they have attributed the same references to the same media as the described in relation to the deconditioning device fifty).

In the present case, slots 73 a, ..., are directed to the bias to ensure a separation of the means of clamping 11 on the four lateral sides of the envelope block conditioned 100, when all separation rods 61a, ...., act in conjugate form.

It should also be observed in figures 11 to 13, another particularity that consists in the possibility of withdrawing, in a single operation, at the same time the elastically deformable means 11 and the end coves 5, 7, separating them from the batch of envelopes 3.

Obviously, the separation of the four sides of the stretch film on the bias grooves 73 a, ..., can be dissociated from the simultaneous removal of the coves.

That said, for any automated withdrawal of these end coves 5, 7, it should be clear that the invention provides limited areas of support for the means of withdrawal (such as 61a, ...., 61d), be the withdrawal of the means of clamping 11 only, or of the conjugate withdrawal of this means of clamping and cleats (as in figure 13).

Indeed, it matters then that these coves of end 5, 7, be locally formed to receive support over them or the pushing means (such as stems 61a, ....,) or traction means (not shown here) that allow, at the point of these coves, to act at least on the environment  clamping 11 (to move it away from the batch of envelopes 3), even on the set constituted by this means 11 and the coves 5, 7, for, together, move them away from the batch of envelopes, as in the figure 13.

In figures 7 to 10, said delimited areas of support reserved on the end coves 5, 7 are constituted by open slots 65a, ...., 65d. In the Figures 11 to 13, the open slots 75a are found again, ...., 75d located above the height l of the coves, at their ends opposite lengths, but those grooves are here formed in the point of the interior angle of these ends of the coves, to reserve an outer support flange 77, at each end, allowing to separate the medium 11 by means of an action on some Bounded areas in this way.

It should be noted that, eventually, these areas delimited support could be located elsewhere on the coves and / or be shaped differently, if necessary in union with means of separation other than the stems 61a, ...., even if these means facilitate the automation of deconditioning Thus, one could for example foresee the presence, on the end coves, of some protruding legs accessible to the fingers of an operator and to ensure the manual deconditioning of the envelope lot 3.

In Figures 11 to 13, it will have been observed also the presence, on each calaextrema 5, 7, of a cut 79 which can be presented as a vertical throat (see figure 13) and that prevents the support bar 51 from acting on the cleats.

Thus, once the push rods 61a, ...., are coupled in front of the flanges 77, are activated while that the bar 51 rests on the envelopes (figure 12). So both the two support coves 5, 7, and the clamping means 11 stretchable, they are separated from the batch of envelopes 3. It only remains to separate this batch of envelopes of the rest (see figure 13).

The attached frames or means have not been illustrated of support or drive (motor, set of braces, ...) in none of the figures showing the main elements of the deconditioning device 50, 70, which allows for example that the push rods 61a, ..., pass from their position retracted to its active position. These means are within reach of Expert in the field and are known for themselves.

Claims (12)

1. Block of conditioned envelopes that understands:

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a series of envelopes (3, 3a) that have a front surface (30 a) on which an envelope closure tab is closed, a rear surface (30b) and a edge, the envelopes being arranged facing each other, by one and / or another of the surfaces front and rear, and

-

a means (11, 110) for securing the series of envelopes, characterized in that it comprises rigid coves (5, 7) arranged on both sides of said series of envelopes, facing the front or rear face of the first and last of the envelopes of the series, and because the clamping means closely surrounds the series of envelopes and the two rigid coves.

2. Envelope block according to claim 1, characterized in that, within the series:

to)

everybody the envelopes are oriented identically and the holding means  (11, 110) surrounds the separate envelopes of the closure tab (9),

b)

the closure tab of each envelope extends along one side of  longer length (L) of this envelope, and

C)

there is an orientation reference of the envelopes, including the position of the tab (9) of closing:

-

due to the ability to visually locate this orientation through of the clamping means (11) and at least one of the coves (5, 7), I

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by means of signaling means that identify this orientation and are provided on the clamping means (11) and / or on at least one of the coves (5, 7).

3. Envelope block according to any one of the preceding claims, characterized in that the clamping means (11) is elastically deformable, outside the tension exerted on it, and surrounding in an elastic state the series of envelopes and the rigid coves. 4. Envelope block according to any of the preceding claims, characterized in that the holding means (11) comprises a stretch film of plastic material. 5. Envelope block according to claim 4, characterized in that the rigid coves (5, 7) and the holding film of the series of envelopes are transparent, either the film and / or the coves are provided with a signaling means for provide the user of the block of conditioned envelopes with a signage in the space of the envelopes, which are, in the series, all oriented in the same way. 6. Set comprising:

-

a series of blocks of conditioned envelopes (1) according to any of the preceding claims,

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a handling pallet (31) on which several blocks of conditioned envelopes, arranged at least some with a section of the edge of the envelopes and the coves of said blocks in front of a upper support surface of the pallet, and

-

a coating medium for pallet and envelope block series arranged on it, this covering means comprising a stretchable elastic film, stretched in its deformation zone elastic

7. Assembly according to claim 6, characterized in that:

-

the series of blocks (1) of conditioned envelopes is distributed in several overlapping layers,

-

a intermediate element (33) is interposed between at least some of the layers, and

-

to the minus some of these blocks of envelopes present, within the series of envelopes, surface irregularities at a level upper and / or lower block, due to tolerances of manufacturing.

8. Assembly according to claim 6 or 7, characterized in that at the first level point of the block of envelopes located immediately above the pallet, the blocks of envelopes in question rest on a solid, unworked support surface by means of it of an intermediate sheet (35) and / or a solid horizontal upper surface (37) of the pallet. 9. Method for deconditioning an envelope block according to any one of claims 1 to 5, characterized in that:

to)

be disposes at least one of said envelope blocks (1; 3, 3a) in a envelope treatment machine loader (67),

b)

with before or after stage a), is removed from a single piece the clamping means (11, 110) that tightens the series of envelopes and rigid coves (5, 7), without thereby breaking this means of clamping, and rigid coves are also removed,

C)

then the machine is fed envelope treatment with this series of envelopes Unconditioned, arranged in the charger.

Method according to claim 9, characterized in that to remove the clamping means and / or the rigid coves with respect to a series of conditioned envelopes, the clamping means (11) and / or the rigid coves (5, 7) are separated with respect to said series of envelopes, however maintaining all the fastening means and / or the rigid coves in front of the front (30a) or rear (30b) surfaces of the envelopes facing them, and then the medium is removed of clamping and / or rigid plates, by relative transverse displacement, separated with respect to these surfaces, between the series of envelopes and said coves and / or the clamping means. 11. Machine for coating a series (1) of envelopes in the form of a block according to any one of claims 1 to 5, comprising the machine:

-

a clamp (17) with jaws (19, 21) to tighten the series of envelopes and rigid coves, and

-

some means to arrange, tight around them, a means of clamping (11) of the series of envelopes and rigid coves, being provided said fastening means, at the time of placement, around the series of envelopes, rigid coves and clamp jaws.

12. Machine according to claim 11, characterized in that at least some of the clamp jaws are provided with a surface (27) that has a sliding power with respect to the rigid coves and / or the clamping means, to facilitate its removal later of the placement of this fastening means around the coves and the series of envelopes.