FR2952850A1 - Method for realizing e.g. containers, by folding sheet or skin made of flexible or semi rigid material e.g. rubber, involves realizing incisions on part of thickness of sheet or skin along folding lines between two jointed panels - Google Patents

Abstract

The method involves realizing a patterned surface or a model of object to be realized on a sheet or skin made of flexible or semi rigid material, and realizing incisions on part of thickness of the sheet or skin along folding lines between two jointed panels. A cut-blank is realized on total thickness of the sheet or skin. The cut-blank of total thickness and the incisions in partial thickness are carried out in single operation. An independent claim is also included for a device for realizing containers, office accessories, satchels, small bags, boxes, cases or decorative articles by folding sheet or skin.

Description

METHOD AND DEVICE FOR REALIZING LEATHER BOXES AND ARTICLES

The present invention relates to a method and a device for its implementation, intended to allow the manufacture of boxes or boxes, bags, small suitcases, or office items or decoration, from a sheet, panel or skin , of flexible or semi-rigid material, such as leather, rubber, imitation leather or the like.

The present invention relates more particularly to the manufacture of so-called archive boxes or intended to contain folders or folders, or other objects of office equipment, such as binders, or saddlebags or small suitcase.

The preferred material for the implementation of the invention is leather.

Archive boxes or housings intended to contain folders or folders are, in known manner, made from cardboard, generally corrugated cardboard, from a pre-cut cardboard sheet. The user performs the folding and nesting of the successive tabs, to arrive at the desired box.

If these boxes are advantageous in terms of cost, they have an external appearance or aesthetic not very advantageous. In other words, the archive or file boxes, of known types and made of cardboard, can not be arranged for example in an office, or a conference room, or in a room where the aesthetic appearance is essential.

In addition, with regard to certain office equipment, such as stationery items and especially file cabinets, the problem is substantially the same. Indeed, the known binders are made of rigid cardboard whose aesthetic appearance is not pleasing to the eye. Plastic folders are also produced which, despite the finish, the decoration and the colors, do not make it possible to forget the appearance resulting from the plastic material, which on the aesthetic level is not always very happy.

In addition, known known types of plastics binders generally comprise a rigid core or inner panel of rigid cardboard covered with flexible plastic sheets. This makes manufacturing complex and therefore increases the cost.

Thus, the need arises to have boxes or boxes, especially for file or archives, on the one hand, and office articles and in particular stationery such as binders for example, on the other hand that are not only functional, but also aesthetically advantageous. However, if leather has a certain aesthetic advantage, it is a difficult material to work, especially with regard to the folds and the junction of the various panels constituting the object to be made.

The invention overcomes these drawbacks and proposes a method and a device for its implementation, intended for the production of case or boxes for files, and stationery articles such as binders, from a skin or sheet in leather, and this in conditions to ensure the characteristics expected by the consumer, reliability and strength, while providing a pleasant aesthetic appearance.

To this end, according to the invention, the process for producing boxes or boxes intended to contain folders or stationery articles such as binders or decorative boxes, from a sheet or skin, of flexible material, and folding of the latter, is characterized in that one carries out: a pattern or a model of the object to be made on a sheet or skin of flexible or semi-rigid material such as leather, rubber, imitation leather or the like; • incisions on part of the thickness of the sheet or skin, along the fold lines between two joined panels.

More specifically, the method comprises simultaneously making at least one cut-out over the entire thickness of the sheet and at least one incision over a portion of the thickness of the sheet.

More precisely, the cutting in full thickness and the incision in partial thickness are made in a single operation. Preferably, during the same operation, two or more partial incisions and two or more total cuts are made.

The invention also relates to a device for making full-thickness cuts on the one hand and partial thickness incisions on the other hand.

In particular, the device comprises: a support or block, on which the sheet or skin of leather to be treated is arranged, constituting a rigid and hard surface; A punch comprising: at least one first blade of a given height and intended for cutting in full thickness of the leather sheet; and o at least one second blade of lesser height than that of the first blade, and intended to make a partial incision in the thickness of the leather sheet.

For example, the sheet or leather panel (also called skin) 10 has a thickness of between 1 and 4 mm, and preferably of the order of 3 mm.

As an illustration, the partial incision is made on about the first quarter, and preferably the first third, of the thickness of the leather sheet, so as to leave an intact leather thickness of at least 0.5 mm and preferably at least 0.8mm.

The invention will be better understood in the light of the following description relating to illustrative but nonlimiting examples of the invention, with reference to the appended drawings in which:

Figure 1 is a perspective view of a box made according to the invention of the file box type or archive;

FIG. 2 is a plan view of a skin or leather sheet showing the cutouts and partial incisions for folding, and intended to constitute the box of FIG. 1.

Figure 3 is a schematic front view, in a vertical plane, of the device of the invention; Figure 4 is a view of the device of Figure 3 and an associated press in a first phase of the method; Figure 5 is a view of Figure 4 in the next step of the method; Figure 6 is a view of Figure 5 in a next step of the method.

Figures 7A and 7B show the sheet or skin of leather respectively flat after cutting and incision, and folded.

Figure 8 shows a perspective view from above of the skin of cut and incised leather, with a beginning of folding.

Figure 9 shows the same skin in a subsequent folding step.

Figure 10 shows another subsequent step of the skin after several bends by a user.

Figure 11 shows a perspective view from above of a subsequent folding and flipping step of some shutters.

Figure 12 shows a detail view of a flap folded by the user.

Fig. 13 shows a detail view of a corner of the box or housing made.

Figure 1 shows a perspective view from above of a box made according to the method and the device of the invention. More precisely, the box shown is a so-called archive box, to contain files or documents.

The box 1 is of parallelepipedal shape, and has relatively standard dimensions to allow to insert folders or file folders. Thus, the interior of said box has dimensions slightly greater than the standard and for example: length 30 cm width: 9 cm - height 22 cm

The above values are only given as examples.

The box 1 thus has two large sides 2 and 3 opposite, two small sides 4 and 5 opposite, a bottom 6 and a foldable closing flap 7, articulated along one of its long sides 8 common with one of long sides (referenced 3 in this case).

In known manner to facilitate gripping, some faces of the box 20 have holes. Thus, the short side 4 has a hole 9; a hole 10 being provided at the junction between the flap 7 and the long side 3.

The large side 2, opposite the large side 3 on which is articulated the flap 7, has an upper notch 2A along its upper side. The flap or shutter 7 has a tongue 7A which extends said flap 7, on the opposite side to its hinge line 8. The tongue 7A has a height (or width) transverse to its longitudinal dimension, of the order a few centimeters, so as to cover and exceed the notch 2A provided on the long side 2.

In addition, a hole 11 is provided on the line of separation between the closure flap 7 and the tongue 7A.

According to the invention, the box shown is made from a flexible material, such as leather or the like.

By way of example, the sheet or skin of leather used has a thickness of between 2.5 mm and 3 mm and preferably of the order of 2.7 mm.

FIG. 2 shows a pre-cut skin or leather sheet having holes or notches cut in accordance with the method and with the device of the invention for producing, after folding and shaping, the box shown by way of example in FIG. 1.

The sheet or leather skin 13, shown flat in Figure 2, has a generally parallelepiped shape.

The leather skin 13 has through cuts throughout the thickness of the sheet, to separate two consecutive or adjacent blanks or panels, and incisions made on a portion of the thickness of the sheet, to allow folding. between two joined panels, the incision line constituting a hinge line.

The cutting lines have rectilinear sections to which can be added curved sections. The incision lines for folding are rectilinear over their entire length.

On the other hand, holes are provided on the skin, such as those described with reference to FIG.

The leather skin 13 thus has a central part consisting of jointed panels joined two by two, and comprising: a first large side 2; a bottom 6; a second large side 3; a closure flap 7; and a tab 7A.

These elements are identical to those of the box assembly and shaped, Figure 1.

The first large side 2 is separated from the bottom 6 by an incision line 14 for folding; the bottom 6 and the long side 3 are separated by a folding incision line referenced 15; the long side 3 and the flap 7 are separated by a fold line 12; and the closure flap 7 and the tongue 7A are separated by a fold line 8. The fold lines 14, 15, 12 and 8 are parallel to each other.

On either side of the central zone defined above, two lateral parts 16 and 17, respectively, have 25 successively for each respective part: an inner lateral flap 5A (4A); a bottom flap 6A (6B); a small side 5 (4); an upper flap 18 (19). The inner side flaps 5A and 4A are laterally extended by tongues 5B and 4B, respectively, separated from the flap 5A (4a) by an incision line for folding (21).

The inner flaps 5A and 4A are separated from the first long side 2 by incision lines 22 and 23, respectively. The bottom flaps 6A and 6B are separated from said bottom 6 and the side flaps 5A and 4A by cutouts in full thickness. forming an L, respectively 24 and 25, while these same bottom flaps 6A and 6B are separated from the lateral sides 5 and 4 by folding incision lines respectively 26 and 27.

Similarly, the lateral sides 4 and 5 are separated from the long side 3 by incision lines respectively 27 and 28.

The upper flaps 18 and 19 are separated on the one hand from the closure flap 7 and the tongue 7A by a full-thickness cutting line respectively 29 and 30 and on the other side sides 5 and 4 by a double line. incision for folding referenced respectively 31 and 32.

The lateral sides 4 and 5 comprise on their distal edges tabs respectively 33 and 34 intended to cooperate with lights or slots of complementary shapes provided in the skin or leather sheet 13, referenced 35 to 42.

The production of full thickness cut-outs for separation of the joined panels, on the one hand, and incisions on part of the thickness for folding on the other hand, is shown with reference to FIGS. 3 to 6 according to the different steps of the process. , and with the device according to the invention.

FIG. 3 shows in cross-section, in a vertical plane, a portion of the device of the invention intended to produce the box of FIG. 1 from the skin or leather sheet 13 shown in FIG. 2. The device comprises a block 43 or support in rigid material resistant to punching, such as metal and parallelepiped shape, whose upper surface 43A defines a rectangle on which is able to be deposited, in the manner described below, the leather skin 13. 10 The device further comprises a carrier 44 consisting of a support plate 45 of parallelepipedal shape, of metal, of thickness for example of the order of 2 mm, and on the underside of which (turned towards the block 43 ) are reported, for example by welding, the cutting plates 46 and 47 on the one hand and the incision plates 48 and 49 on the other hand.

The incision plates on the one hand and cutting on the other hand are perpendicular to the plane of the support plate 45, the punch 44. According to the working arrangement of the device, the support plate 45 is horizontal and the respective incision and cutting plates are vertical.

The incision and cutting plates have a length of about 20 mm and a thickness of about 2 mm, and are provided at their distal end (opposite to the backing plate 45, i.e. to the chisel end 43), tapered and sharp. FIG. 4 shows a next step of the process in which the skin is deposited on the block 43. The skin 13 consists of a parallelepiped-shaped leather sheet or skin of slightly larger dimensions than the pattern or model shown in Figure 2, for making the box of Figure 1.

The skin 13 is arranged flat on the upper face 43A of the block 43.

The user then lays on the skin 13 the outer piece 44, which rests 10 by its own weight in a first time on said skin.

The cutting plates, intended to make incisions in the thickness of the leather, have a length greater than the length of said incision plates provided for making fold lines in said skin. The difference in height between the two types of plates is of the order of 0.8 mm, but can be between 0.5 and 1.2 mm.

In relative terms, the difference in height between the incision plates and the cutting plates is between about 40% and 80% of the skin thickness, and preferably of the order of 40 to 50%.

According to Figure 4, it is understood that the incision plates being shorter than the cutting plates, only the latter rest by their tapered tips on the skin 13. 25 Still according to Figure 4, in a second step, approaching according to a vertical direction towards the apertube 44, a press 50, known per se, and connected to hydraulic or similar pressure means, not shown, until the press comes into contact with the upper face of the punch 44.

The downward movement (toward the skin 13 and the block 43) of the press 50 continues in the direction of the arrow "f" (FIG. 5) by applying a sufficient pressure so that the cutting and incising plates can penetrate, respectively totally and partially, into the thickness of the skin 13 to arrive at the result shown in FIG.

Thus, the skin 13 has cutouts in its total thickness, respectively 51 and 52 (whose width has been intentionally enlarged in the figure for the sake of clarity). The skin further comprises incisions in a part of the thickness 53 and 54 due to the partial penetration of the incision plates 48 and 49 into the skin 13.

With reference to FIG. 6, once the cuts and the incisions have been made, the press 50 is moved in a reverse movement to the preceding one, that is to say an upward vertical movement (arrow "g") while the Piece 44 is also disengaged in the same upward vertical direction (arrow "h") to release the skin 13 carrying the desired cuts and incisions. It will be apparent to those skilled in the art that the shape, contour and number of cuts and incisions corresponds to a pre-established and functional pattern of the object to be made.

In the example described hereinbefore, the punch therefore has a certain number of incision plates on the one hand and cutting plates on the other hand corresponding to the incisions and cuts respectively shown in FIG. such as those referenced 10 and 11 for example are made either before the introduction of the device of Figures 3 to 6, or with the aid of the device shown in Figures 3 to 6, where the port 44 further comprises then elements of cylindrical shapes, for example circular base, and whose end is tapered to allow cutting of the skin in a circle for example to form the desired light.

The insert is made according to the needs for a specific object from a pattern or model drawn on a starting sheet lo cardboard, plastic or paper or other, to define the position of the incision and cutting plates according to needs.

FIGS. 7A and 7B schematically show the principle of folding along the incision lines referenced here 51 and 52 by way of example. FIG. 7A shows the skin flat, once the incisions have been made and comprising three successive contiguous panels A, B and C.

In FIG. 7B, the panels A and C are folded at 90 ° with respect to the central panel B, according to the arrows "i" and "j" in an arc of circle, thanks to the incisions 51 and 52 made on a part of the thickness of the leather sheet 13.

Figures 7A and 7B are only diagrams for explanatory purposes and do not respect the proportions for a better understanding. Once the skin or leather sheet cut and incised, starting from that shown in Figure 2, it is described below the mounting and shaping thereof to lead to the box of Figure 1, and this 8 to 13. FIG. 8 shows the sheet or leather skin 13 flat, with the exception of the bottom flaps 6A and 6B on the side, being folded along the incision lines 26 and 27. respectively. The flaps 6A and 6B are shown in an oblique or transverse position relative to the plane of the skin 13.

The folding movement is continued to arrive at the position shown in Fig. 9 where the bottom flaps 6A and 6B are substantially orthogonal to the plane of the skin, as shown in Fig. 9, and are held by the user's hands. .

Referring to Figure 10, the user folds, along the fold line 15 (between the bottom 6 and the second large side 3) all the panels located beyond the fold line 15 to bring the l This assembly, substantially perpendicular to the plane of the skin 13. During this movement, the bottom flaps 6A and 6B which were already orthogonal to the plane, is found substantially parallel to the plane of the skin 13 and facing the bottom 6. The The user holds them with one hand in this position while holding the rest of the skin (located beyond the fold line 15).

It is noted that the blanks or flaps 18 and 19 can be used to grasp the part of the skin and the corresponding panels for said holding.

Then the user, starting from the position of FIG. 10, tilts the remainder of the skin located below the fold line 14 (between the bottom 6 and the first large side 2) towards the other 3, by driving the inner side flaps 4A and 5A to arrive at the representation shown in FIG. 11. In doing so, the tongues 33 and 34 (FIG. 2) provided on the side flaps 4A and 5A are introduced into the lights 38 and 39 provided for this purpose. In addition, to result in the representation of Figure 11, the side flaps 5B and 4B are folded along the fold lines 20 and 21 at right angles to the plane of the side panels 4A and 5A.

The next step is to fold the upper flaps 18 and 19 inwards of the box as shown in Figure 12. It is noted that each upper flap 18 and 19 is connected to the side 4 and 5 respectively by double parallel lines of folding 31 and 32 (Figure 2).

In Figure 12, there is shown a detail view and from above the box at the fold line of the upper flap 19 inside the box. The double fold line 32 thus comprises two parallel lines 32A and 32B, spaced a few millimeters (preferably of the order of mm) corresponding to the thickness of the panels or sides arranged in the interior of the solid angle formed by the upper flap 19 and the side 4.

When moving from the position of Figure 10 to Figure 11, the inner side panels 4A and 5A are housed inside the box, against the outer sides 4 and 5 respectively. Thus, when we fold the upper flaps 18 and 19, which are in the extension of the outer sides 4 and 5 respectively, said flaps must in some way span the corresponding inner flap 4A or 5A. According to the invention, there are provided two parallel folding incision lines 32A and 32B at the junction of the upper panel 18 or 19 with the corresponding side.

Also, it may be provided that the closure flap 7 is connected to the longer side 3, not by a single line of incision, but by two parallel incision lines spaced two to three millimeters apart, as shown on FIG. Figure 13.

The fact of making two fold lines by incision, close and parallel, over a part of the thickness, makes it possible to improve and facilitate the folding of the panel to fold down, with respect to the panel to which it is attached, while sparing the material at the incised fold line.

Claims (8)

REVENDICATIONS1. Process for the production of containers, office articles or files (folders), bags, small suitcases, boxes or boxes or decorative articles for holding folders, from a sheet or skin, of flexible material, and folding of that This is characterized in that: a pattern or a model of the object to be made on a sheet or skin of flexible or semi-rigid material (such as leather, rubber, imitation leather or the like) is produced; incisions on a part of the thickness of the sheet or skin, along the fold lines between two joined panels. 2. Method according to claim 1, characterized in that simultaneously, at least one cut is made on the entire thickness of the sheet and at least one incision on a part of the thickness of the sheet. . 3. Method according to claim 2, characterized in that the full thickness cutting and the partial thickness incision are performed in one operation. 4. Method according to one of claims 1 or 2, characterized in that during the same operation, two or more partial incisions and two or more total cuts are made. 25 5. Method according to one of claims 1 to 4, characterized in that the partial incision is made on about the first quarter and preferably the first third of the thickness of the leather sheet, so as to leave a intact leather thickness of at least 0.5 mm and preferably at least 0.8mm. 6. Apparatus for carrying out the method according to one of the preceding claims, characterized in that it comprises means for making cutouts in full thickness on the one hand and incisions in partial thickness on the other hand. 7. Device according to claim 6, characterized in that it comprises: • a support or block, on which is disposed the sheet or skin of leather to be treated, constituting a rigid and hard surface; • a punch comprising at least a first blade of a given length and for cutting the full thickness of the leather sheet; and ia o at least one second blade of shorter length than that of the first blade, and intended to make a partial incision in the thickness of the leather sheet. 8. Sheet or skin of flexible or semi-rigid material, of the leather, rubber or imitation leather type, intended to produce an object according to the method according to one of claims 1 to 5, characterized in that it has a thickness of between 1 and 4 mm, and preferably of the order of 2.5 mm.