WO1997037554A1

WO1997037554A1 - Method for making reversible footwear, particularly a bootee, and footwear thus obtained

Info

Publication number: WO1997037554A1
Application number: PCT/FR1997/000617
Authority: WO
Inventors: Charles Sirakorzian; Lydie Sirakorzian; Joseph Sirakorzian; Yvette Sirakorzian
Original assignee: Cap Coeur S.A.R.L.
Priority date: 1996-04-04
Filing date: 1997-04-04
Publication date: 1997-10-16
Also published as: FR2747019A1; EP0902625A1; FR2747019B1; AU2394197A

Abstract

A method for making a footwear article, particularly an infant bootee, including an upper (10, 12), optionally comprising a foxing (10), a rear quarter (12) and a sole (14), comprising the steps of cutting the pieces (26, 28, 46, 48) forming the upper in a first (22) and second (24) material in accordance with the shape of the desired article of footwear, assembling the upper at least from the said two cut pieces which have been sewn together at least at one of the cut edges thereof, and placing an edging (68) on the free edge of the upper and opposite the edge of the sole, cutting at least one piece forming the sole (14) of the desired article, and sewing together (70) the edge of the sole and the edging of the upper so as to make the article of footwear entirely reversible. The product thus obtained is also disclosed.

Description

METHOD FOR MANUFACTURING A REVERSIBLE FOOTWEAR, IN PARTICULAR A FOOTWEAR AND FOOTWEAR OBTAINED

The subject of the present invention is a reversible footwear article and the method for preparing this article. The invention relates more particularly to infant articles such as slippers.

Footwear is known comprising in a known manner a sole with a rod, the two elements being assembled by a technique called "overlocking" but this type of article has no possibility of being reversible by the very structure of the assembly. In fact, both the upper and the sole are generally made up of a single layer of fabric or leather material, which itself can be reversible as a material, but this does not necessarily make the article reversible.

Indeed, the various assembly seams of the rod, the slap and the rear quarter, like the chutes or the complementary elastic bands have no reversibility character.

However it can be very useful to make reversible footwear for infants but also for children and adults as will be explained later in the description.

Also, the present invention provides a method of manufacturing a reversible footwear item comprising two superposed layers of fabric.

This article is of a low additional cost price for a very sensitive commercial interest and it provides advantages for the still unknown consumer. We note that it is possible to double the possibilities to wear clothing and shoes or slippers.

To this end, in general, the method of manufacturing an article of footwear, according to the invention, in particular an infant bootie, comprising a rod, possibly composed of a slap and a hind quarter, and d '' a sole, is characterized by the following stages:

- cutting of parts forming the upper according to the shape of the footwear to be obtained, this in a first material and a second material, - assembly of the upper at least from the two identical parts thus cut,

cutting of at least one part forming the sole of the footwear to be obtained, and

- Connection of the edge of the sole with the upper, so as to make said article of footwear perfectly reversible.

More specifically, the present method of manufacturing an article of footwear, in particular an infant bootie, comprising a rod, optionally composed of a slap and a rear quarter, is characterized by the following steps: - cutting of the pieces forming the upper according to the shape of the footwear to be obtained, this in duplicate in a first and a second material,

- assembly of the upper at least from the two pieces thus cut and sewn together by at least one of their edges coming from the cut, and planking of the free edge of the upper opposite the edge of the sole

cutting of at least one piece forming the shape of the footwear to be obtained, and

- Connection by sewing of the edge of the sole with the planking of the upper, so as to make said article of footwear perfectly reversible.

According to ^r e aut particular characteristic of the invention, the soleplate is made from α <- .. x blanks respectively in a first and a second fabric and having a planking, and the connection is made by seaming between the two plankings of the sole and of the upper.

According to a particular embodiment, there are prior to the final assembly of the accessories between the two parts of the rod, in particular an elastic strap.

According to a variant, at least one chute is produced by an additional seam, so as to be able to introduce a lace.

According to an alternative embodiment, the rod comprises a slap and a rear quarter, themselves comprising two parts and the parts are assembled before the planking of the rod is produced.

More particularly, the parts of the slap comprise a tongue which has been cut out with said slap and these tongues are assembled before the planking of the rod is produced.

The subject of the invention is also a method of manufacturing a sole by injection for such an article of footwear, which is characterized by the succession of the following steps:

- introduction of a shape ensuring the role of mold in the liner, the lower part being shaped to the profile of one of the faces of the sole to be obtained, - installation of the assembly in a counterform ensuring the role against the mold, the upper part of which conforms to the profile of the other of the faces of the sole to be obtained,

- injection of the plastic material for the simultaneous production of the inner and outer sole, and - removal of the shape

The subject of the invention is also the footwear article obtained. The method according to the invention is described below with reference to the appended drawings which represent a nonlimiting embodiment, the various figures showing more particularly: FIG. 1A, a view of an article of footwear of the infant slipper type, showing on the outside a first fabric, - Figure 1 B, a view of the same footwear as that of Figure 1 A, but after it has been turned over, thus showing a second fabric on the outside,

FIG. 2A, a view of an insulated sole intended to be mounted as in FIGS. 1 A and 1 B, showing the first face in the first fabric,

FIG. 2B, a view of the same sole as that of FIG. 2A but seen on the other face and produced in the second fabric,

FIG. 3A, a sectional view along line 3A-3A of FIG. 1A, - FIG. 3B, a sectional view along line 3B-3B of FIG. 1B,

- Figure 4, a view of the different parts before assembly, and

FIG. 5, a view of the footwear before final assembly like that shown in FIG. 1 A or 1 B,

FIG. 6, a sectional view of the footwear according to the invention with means for producing an inner and outer sole simultaneously, by injection, and

- Figure 7, a detailed sectional view of the injection molding part.

In Figure 1 A, there is shown an infant bootie which includes a slap 10, a rear quarter 1 2, a sole 1 4 and a tongue 1 6 which is cut with the slap.

There is also a chute 1 8 provided for slidingly receiving a lace 20.

In FIG. 1A, the outer surface 21 produced in a first fabric 22 has been left blank, and in FIG. 1B, the outer surface produced in a second fabric 24 has been shown with hatching.

In FIG. 4, the various parts necessary for the production of the liner of FIGS. 1 A and 1 B are visible in exploded form.

The rear quarter 1 2 comprises two pieces 26 and 28 made one from the first fabric 22 and the other from the second fabric 24. The two pieces are assembled by an attached stitching 30 on the reverse side, the place only being visible in this figure 4. This stitching defines, as will be explained later, the upper edge of the liner 32, also referenced in Figures 1 A and 1 B.

The edges 34 and 36 of these two pieces receive a plank 38 and 40, these two planks running over the entire length of the edges of the first piece 26 and over part of the edges of the second piece 28, the edges being considered perpendicular to the stitched joint 30.

The remaining free edges 42 and 44 are left uncut.

In this same FIG. 4, there is also shown the slab 1 0 which comprises two parts 46 and 48 produced respectively in the first fabric 22 and in the second fabric 24.

On these two pieces 46 and 48 of slap, we distinguish the two parts 50 and 52 which will constitute the tongue 1 6. Each of these parts 46 and 48 of the slap have a free edge 54 and 56 and lateral edges 58 and 60 .

The different edges of the different parts are assembled as indicated by the arrows.

Thus the lateral edges 58 of the piece 46 of the slap 1 0 are sewn astride the edges 34 and 36 of the piece 26 of the rear quarter 1 2, these edges having received a planking 38 and 40 and the assembly being produced in the first fabric 22. Thus the side edges 60 of the piece 48 of the slap 1 0 are sewn joined with the edges 34 and 36, of the piece 28 of the hindquarters 1 2, these edges having received a planking 38 and 40 and the the assembly being produced in the second fabric 24.

Once these assemblies have been carried out, the two parts 50 and 52 should be joined to definitively form the tongue 1 6.

The sole 14 also comprises two pieces 62 and 64 cut respectively from the first fabric 22 and from the second fabric 24, then assembled and bordered by a single planking 66.

Prior to final assembly, the free edges 42 and 44 of the pieces 26 and 28 of the hindquarters and the free edges 54 and 56 of the pieces 46 and 48 of the slap are joined by a single plank 68, running all along, with a bevel edging finish, this in known manner. We are then in the situation shown in FIG. 5. To obtain the slipper of FIG. 1A, the final assembly must be carried out by sewing 70 of the curbs 66 and 68.

The finishing consists in stitching the two pieces 26 and 28 of the rear quarter at a given distance from the upper edge 32, thus producing a chute 1 8 into which a lace 20 is threaded. The reversibility is thus total.

We can imagine different particular embodiments the shapes of your slap and the hindquarters can vary to create different models as is common in the middle of the shoe.

One can also consider accessories such as elastics judiciously arranged, so as to retain the slipper on the infant's foot. This elastic is preferably placed between the two fabrics 22 and 24, which makes it perfectly invisible, even after reversibility. With regard to children and adults likely to walk with such footwear, it is necessary to provide a sockliner to remove during the reversibility operation and to put back before a new use.

In this case, advantageously, the sole is made of a wear-resistant material, such as leather, rubber or an elastomer. Of course, the materials used have been cited as being fabrics, but they can be chosen from synthetic materials or natural materials such as leather or combinations thereof.

Likewise, each part can itself be made up of different materials and be broken down into several parts without thereby escaping the characteristics of the present invention.

With regard to the sole, many variants can be envisaged in particular, a fabric face with the other elastomer face and more generally all the variants of such soles, with pins or an arch for example.

In Figure 6, the boot has been shown with the same references as those used previously, for the common parts. From this FIG. 6 and from FIG. 7, it is possible to describe a method of injection molding of an inner and outer sole simultaneously as well as the means of implementing this method. The term “outer and inner sole” is understood to mean the face of the sole accessible from the outside or from the inside at a given time and vice versa, since the liner is reversible.

The sole 14 is a sole made of a sheet of material capable of supporting a plastic injection molding. It is provided with holes 80, called communication and balancing holes. This sole 1 4 is sewn at 82 over its entire periphery to the various parts of the liner such as the slap 1 0 and the rear quarter 1 2.

Sewing has a double role, the first being to secure the sole to the upper of the liner, as well as to position the sole relative to the upper for the injection operation while retaining it in place during the phase injection proper.

Advantageously, a type of seam is used which limits the overlapping of thicknesses so that the edge of the sole is harmonious and does not cause any discomfort to the wearer.

The process for molding a reversible sole suitable for the reversible slippers according to the invention comprises the following steps:

introduction of a shape 84 ensuring the role of mold in the liner, the lower part being shaped to the profile of one of the faces of the sole 1 4 to be obtained,

positioning of the assembly in a counter-form 86 ensuring the role of counter-mold, the upper part of which conforms to the profile of the other of the faces of the sole to be obtained,

- injection of the plastic material for the simultaneous production of the inner and outer sole, and

- withdrawal of the form. The drawing of Figure 6 is schematic to allow the explanation of the process steps. In Figure 7, there is shown in detail a shape 84, in detail according to a particular embodiment.

The counter-form 86 does not require any detail since it is within the reach of those skilled in the art. The form 84 includes two front parts 84A and rear 84B.

The front part 84A comprises a support 90 on which is removably attached a front part 92A of a block 92 with the profile and the surface condition retained for the sole.

A movable core 94 is mounted sliding in translation relative to the support with guide means, not shown but which can take the form of grooves / tongues.

A spring 96, working under compression, is interposed between the support and this movable core.

The rear part 84B has a flat surface combined with the planar shape of the rear of the front part so as to produce a joint plane 98.

This rear part conforms to the profile of the rear of the liner. It comprises a fixed core 100 on which the rear part 92B of the block 92 is removably attached.

This two-part embodiment facilitates demolding by the relative movement of the front core relative to the rear core.

Claims

1. Method for manufacturing an article of footwear, in particular an infant bootie, comprising a rod (10, 1 2), optionally composed of a slap (10) and a rear quarter (1 2), and of a sole (14), characterized by the following stages: - cutting of parts (26, 28, 46, 48) forming the upper according to the shape of the footwear to be obtained, this in a first material (22) and a second ( 24) material,

- assembly of the upper at least from the two identical pieces thus cut, - cutting of at least one piece forming the sole (14) of the footwear to be obtained, and

- Connection (70) of the edge of the sole with the upper, so as to make said footwear article perfectly reversible.

2. Method for manufacturing an article of footwear, in particular an infant bootie, comprising a rod (10, 1 2), optionally composed of a slap (1 0) and a rear quarter (1 2), and a sole (1 4), characterized by the following stages:

- cutting of pieces (26, 28, 46, 48) forming the upper according to the shape of the footwear to be obtained, this in a first material (22) and a second (24) material,

- assembly of the rod at least from the two identical parts thus cut and sewn together by at least one of their edges coming from cutting and intended for this purpose, and setting up a planking (68) on the free edge of the upper opposite the edge of the sole,

cutting at least one part forming the sole (14) of the footwear to be obtained, and

- Connection by sewing (70) of the edge of the sole with the planking (68) of the upper, so as to make said article of footwear perfectly reversible. 10

3. A method of manufacturing an article of footwear according to claim 2, characterized in that the sole (1 4) is produced from two pieces (62, 64) cut respectively from a first and a second fabric and carrying a planking (66), and in that the seam connection is established between the two plankings (66 and 68) of the sole and of the upper.

4. A method of manufacturing an article of footwear according to claim 2 or 3, characterized in that prior to the final assembly of the accessories between the two parts of the upper.

5. Method of manufacturing an article of footwear according to claim 4, characterized in that there is available as an accessory at least one elastic bracelet.

6. A method of manufacturing an article of footwear according to claim 4, characterized in that at least one chute (1 8) is produced by an additional seam, so as to be able to introduce a lace (20), possibly combined with a elastic element.

7. A method of manufacturing an article of footwear according to any one of the preceding claims, characterized in that the upper comprises a slap (10) and a rear quarter (1 2), themselves comprising two parts (26, 28 ; 46, 48) and in that the parts are assembled before the planking (68) of the rod is produced.

8. A method of manufacturing an article of footwear according to claim 7, characterized in that the parts (46, 48) of the slap (1 0) each comprise a tongue (50, 52) cut from said slap and in that these tabs are assembled prior to the completion of the planking of the rod.

9. A method of manufacturing a sole by injection for an article of footwear according to one of claims 1 to 8, characterized by the succession of the following steps:

introduction of a shape (84) ensuring the role of mold in the liner, the lower part being shaped to the profile of one of the faces of the sole (14) to be obtained, placing the assembly in a counter-form (86) ensuring the role of counter-mold, the upper part of which conforms to the profile of the other of the faces of the sole to be obtained,

- withdrawal of the form.

1 0. Footwear obtained by the implementation of any one of the preceding claims, characterized in that, for footwear intended for walking, there is provided a insole disposed in a removable manner in said footwear.