FR3122820A1 - NEW CONDOMS MANUFACTURING METHODS OFFERING TACTILE PERCEPTION EQUIVALENT TO NATURAL PERCEPTION - Google Patents

Abstract

NEW METHODS OF MANUFACTURING CONDOMS OFFERING TACTILE PERCEPTION EQUIVALENT TO NATURAL PERCEPTION The present invention uses the theory of tactile discrimination thresholds to modify existing manufacturing techniques according to several processes and to produce condoms offering tactile sensations equivalent to natural conditions. The means of increasing the sensations is to create structures in relief (2) on the surface of the condoms (1) having dimensions greater than 1 mm in height and 2 to 3 mm in width and spacing, dimensions which make it possible to achieve the theoretical thresholds of tactile discrimination at the level of the genital organs. Prior techniques make it possible to manufacture thin or textured condoms, but the textural patterns thus produced are of the order of a few tenths of a millimeter because they are dimensionally close to the thickness and therefore do not allow tactile discrimination thresholds to be reached. Figure for abstract: Figure 1.

Description

NEW CONDOMS MANUFACTURING METHODS OFFERING TACTILE PERCEPTION EQUIVALENT TO NATURAL PERCEPTION

The invention relates to the manufacture of new types of condoms offering tactile sensations equivalent to natural conditions (absence of a condom).

Today, the use of condoms is limited, among other things, by users' lack of appetite for current condoms, a number of them rejecting this solution on the grounds that it does not provide the same feelings of pleasure than natural conditions (no condom).

With the aim of manufacturing condoms offering tactile sensations equivalent to natural conditions, the present invention uses the theory of tactile discrimination thresholds to modify the existing manufacturing techniques according to several manufacturing methods. Indeed, the way to increase the sensations provided by condoms is to create structures in relief (2) on the surface of condoms (1) as shown schematically , these structures having sufficient dimensions to reach the theoretical thresholds of tactile discrimination at the level of the genital organs.

We take here the expression "tactile perception" in the general sense, namely the perception of sensations by touch transmitted through the skin, mucous membranes, etc.

STATE OF THE PRIOR ART

The condom is a thin and flexible case, impermeable to blood as well as secretions. There are two types: the male condom and the more recently introduced female condom. It is generally made of natural Latex or sometimes of Polyurethane or Polyisoprene as described below [ Ref.1 ].

We use here the general definition of the word latex, namely an aqueous emulsion of certain natural polymers (natural Latex) or synthetic, emulsion resulting from a polymerization [ Ref.2 ].

Condoms have two primary functions: (i) a contraceptive function: contraception is one of the most well-known solutions to the problem of overpopulation because it makes it possible to limit the number of births and represents the easiest solution to deploy and the less expensive. (ii) a function of preventing sexually transmitted infections: note that the condom is the only contraceptive that also protects against sexually transmitted infections.

As for the male models, there are condoms with a smooth shape which claim an improved feel when the condom is very thin and so-called 'beaded' and/or 'ribbed' condoms which feature positive or negative raised shapes ( grooves and/or graininess), but again these models offer less tactile sensation than the absence of a condom (natural conditions).

Common condom sizes

The dimensions of current male condoms vary. The lengths vary from 165 to 220 mm, the nominal widths vary from 41 to 69 mm (corresponding to nominal diameters from 26 to 44 mm) and the thicknesses vary from 40 to 110 microns (i.e. from 0.4 to 1.1 tenths of a millimeter).

Common manufacturing method of dip molding

The most common manufacturing method is that of dip molding [ Ref.3 ].

According to this method, phallic molds are slowly immersed in a latex, namely an aqueous emulsion of certain natural (natural latex) or synthetic (polyisoprene latex, polyurethane, butadiene-acrylonitrile copolymers, etc.) polymers.

The soaking forms an almost invisible layer on their wall. The film undergoes a first phase of drying in a filtered environment in order to avoid any atmospheric contamination. Once dry, the coated mold is again soaked and dried in order to reinforce the strength of the film. It then generally follows, for rubber materials, a vulcanization step which aims to improve the elasticity and resistance of the latex. After vulcanization, comes the rinsing stage which eliminates the majority of allergens accumulated during the manufacturing process. Finally, using high pressure jets, the condom is detached from its mold before being dried and then rolled on itself.
One of the main claims of prior condom manufacturing techniques is the manufacture of thin to very thin (1.1 to 0.4 tenths of a millimeter, or 110 to 40 microns) condoms that feel better than thick condoms.

This manufacturing technique also makes it possible to develop textured condoms, made from beaded, grooved or even ribbed moulds. However, the textural patterns achievable with this technique are of the order of a few tenths of a millimeter because they are dimensionally close to the thickness.

Inkjet technology and 3D printing technologies

It should be noted that inkjet and 3D printing technologies are not, to date, technologies used in the manufacture of condoms.

Inkjet technology was invented in the printing industry in the early 1950s to deposit aqueous inks onto paper. It is used in many fields outside of printing and is also used in 3D printing technologies.

3D printing technology is one of the great technological and industrial revolutions of this beginning of the century. Among the various 3D processes developed to date such as: Fused Deposition Modeling (FDM) - Selective Laser Syntering (SLS) - Stereolithography Apparatus (SLA) - Digital Light Processing (DLP) and Binder Jetting or MultiJet Modeling (M.J.M.), both the latter are of particular interest to us.

The 3D printing process by material jet or Material Jetting MultiJet Modeling (M.J.M.), makes it possible to deposit layers of photopolymer resin drop by drop, as for a traditional inkjet printer and an ultraviolet treatment is applied to each layer. deposited to harden the material.

The Digital Light Processing (DLP) additive manufacturing process is based on a photo-polymerization process. A liquid photosensitive resin, contained in a tank of the 3D printer, is polymerized, layer by layer, by UV rays from a light source.

In additive manufacturing processes, photoresists are generally two-component products based on epoxy resin, polyurethane, acrylic or silicone.

In the field of 3D printing, it should be noted, for example, that the APPLE company has filed several patents concerning the use of an inkjet printer projecting conductive ink, loaded with small metallic or polymer particles. [ Ref.4 ].

More interestingly, the SIGVARIS company has filed a patent for a process for inkjet printing of a two-component silicone-based composition on a textile support [ Ref.5 ] and finally, the BEIJING MEIKEYI company CO has filed a patent for an inkjet printing process for Braille patterns [ Ref.6 ].

TECHNICAL PROBLEM

Today, the use of condoms is limited, among other things, by users' lack of appetite for current condoms, a number of them rejecting this solution on the grounds that it does not provide the same feelings of pleasure than natural conditions.

In this regard, Dr. Papa Salif Sow [ Ref.7 ], member of the 'Gates Foundation', mentions that according to some detractors “ using a condom is a bit like taking a shower in a raincoat ”.

To overcome this problem, some manufacturers offer beaded, grooved or ribbed condoms which have shapes in positive or negative relief (grooves and/or graininess), condoms which offer improved sensations but still insufficient with regard to the lack of appetite of users. .

According to an observation of this patent, we note that the structure and the size of the reliefs achievable with the previous techniques, do not make it possible to reach a satisfactory “threshold of tactile discrimination”.

Let's see why.

Limitation of Prior Manufacturing Techniques

According to an observation of this patent, the reliefs achievable with prior techniques do not provide tactile sensations close to natural conditions for reasons of tactile discrimination.

To understand what it is, we must first define what tactile perception and the threshold of tactile discrimination defined in Weber's theory are.

Tactile perception and discrimination threshold

Tactile perception is one of the sensations detected by sensory receptors located under the epidermis, the somatosensory receptors or mechanoreceptors [ Ref.8 ].

The skin has several types of sensory receptors, which react according to different stimuli, and which send information that can be interpreted by the brain, such as the corpuscles of Merkel, Meissner, Ruffini and Pacini which are mechanoreceptors (light pressure, touch, stretching of skin and vibrations), localized in the skin (including lips, nipples, external genitalia, fingertips) [Ref.8] to [ Ref.10 ].

In neurophysiology, to determine the threshold of tactile discrimination, an aesthesiometer is used, a device resembling a compass and which allows a subject to determine a threshold of discrimination between two tactile stimuli.

The aesthesiometer is a modern adaptation of Weber's compass (1835), made up of two dry points, thanks to which it was possible to determine tactile discrimination as being the smallest distance between two simultaneous contacts perceived as distinct.

Recent studies have measured precision thresholds on the tactile sense and show that the discrimination between two contact points at the level of the fingers varies from 2 to 3 mm depending on the person [ Ref.11 ].

The tactile perception of fingers is a well-known phenomenon in Braille signage, a tactile writing system with raised points for use by blind or severely visually impaired people.

Thus, in Braille signage, the salient patterns have topographic dimensions varying from 0.5 to 1 mm in height, from 1.2 to 1.5 mm in width and from 2.3 to 2.5 mm in spacing according to the standards of each country.

With regard to tactile perception at the level of the genital organs, we will see later that the tactile discrimination thresholds are dimensionally greater than at the level of the fingers.

Analysis of the limitation of prior manufacturing techniques

One of the main claims of previous techniques is the manufacture of thin to very thin condoms (1.1 to 0.4 tenths of a millimeter, or 110 to 40 microns) offering better sensations than thick condoms.

The logic of using these thin condoms is of course that they can convey the natural texture of the genitals better than thick condoms. The same is true for the sensations of pressure and vibration.

However, due to their rubbery nature, even when they are very thin, these condoms reduce the sensations of underlying texture, pressure, vibration and also absorb some of the stretching of the skin.

Thus, even thinned down, the analogy of Dr. Papa Salif Sow, namely that " using a condom is a bit like taking a shower in a raincoat "... still remains true and explains the lack of appetite of users for condoms. condoms.

A logical solution seems to be to retain the necessary protective function of latex and to provide sensations equivalent to natural sensations by creating a texture on the surface of the condoms.

This is why manufacturers have thought of texturing their condoms, in particular by embossing. However, these products also encounter a lack of appetite from users, because the topographic reliefs achievable with these prior techniques have heights of the order of the thickness of the wall, namely a few tenths of a millimeter, which is far from allowing to reach the thresholds of tactile discrimination.

Indeed, these techniques do not allow the manufacture of larger patterns because the topographical limitations are of two kinds: (i) the wall being elastic, excessive deformations would be damped by the elasticity of the whole; (ii) an embossing too large would compromise the strength of the condom.

Consequently, the topographical variations achievable with the prior techniques remain far from the tactile discrimination thresholds mentioned above and do not make it possible to provide sensations of pleasure close to natural conditions.

Let's see what solutions are offered in recent innovations.

Recent manufacturing methods, patented or patent pending but not launched in production to date

To date, a number of patents have been filed on concepts that have not yet led to a marketing.

We have carried out an analysis of the most relevant patents in the sense that these patents could claim to offer superior tactile sensations to condoms currently on the market.

They bear the bibliographic references 12 to 19.

The concepts described in references 12 to 17 have no connection with our invention: cross-linked polyisoprene particles to increase the resistance of the condom [ Ref.12 ], foam tip to distribute an antiviral substance [ Ref. 16 ] and stronger polyurethane condom [ Ref.17 ].

The concepts described in references 13, 14 and 15 have a claim of improved pleasure: release of liquid [ Ref.13 ], interior condom and exterior condom with an elastomeric ring between the two [ Ref.14 ], mobile ring allowing to block part of the epidermis [ Ref.15 ], but neither have any relation with our invention because they do not claim the possibility of tactile sensations equivalent to natural conditions.

Finally, references 18 and 19, which may seem relevant, however do not claim to improve the sensations at the level of natural conditions: annular boss to avoid contamination [ Ref.18 ], first segment and second segment of smaller diameter and structured [ Ref.19 ].

Finally, in 2015, according to 'The Week' newspaper, the Bill & Melinda Gates Foundation selected eleven projects to manufacture condoms of the future [ Ref.7 ]. Among these eleven projects, we can count five projects aiming to manufacture even thinner condoms, two aiming to manufacture more elastic condoms, two aiming to manufacture condoms with applicator and two aiming to manufacture condoms with lubricant.

Again, the concepts described do not claim the possibility of tactile sensations equivalent to natural conditions.

PRESENTATION OF THE INVENTION

The present invention proposes the manufacture of condoms with tactile perception equivalent to natural conditions through the use of tactile discrimination threshold theory to modify existing processes such as the conventional dip molding manufacturing process.

It should be noted in this regard that the use of a scientific theory for a practical application is recognized according to the INPI Directives (IC-VII 1.1), as well as according to the European Directives (G-II 3.1 ).

Within the framework of the theory of tactile discrimination thresholds, we propose here a quantitative scale which, although it is subjective, should allow us to compare the perception of pleasure procured by the different condoms.

Evaluation of the sensation of pleasure according to tactile perception

If neurophysiology does not offer a complete theory of the level of pleasure and its measurement, it is because the psychological and physical factors are far too numerous and too complex. Among the physical factors, account should be taken of all the stimuli (such as perceived pressure, variations in pressure, frequency and intensity of vibrations, stretching of the skin, etc.) which solicit the sensory receptors or 'mechanoreceptors' that we quoted above ([Ref.8] to [ Ref.10 ]).

However, in a very schematic way and if we restrict ourselves to the only components of tactile perception transmitted and attenuated by condoms, we propose to use a linear scale of the type generally used to assess pain (called a numerical scale of self-esteem). -assessment).

Thus, according to a subjective pleasure rating scale ranging from 0 to 10, where 0 corresponds to the absence of pleasure and 10 corresponds to maximum pleasure, current standard condoms can be rated from 3 to 5, structured condoms manufactured according to prior techniques from 4 to 6, natural conditions (absence of a condom) from 8 to 10 and condoms manufactured according to the present invention from 8 to 10 when the structures in relief reach the aforementioned theoretical thresholds of tactile discrimination at the level of the genital organs .

Using this subjective scale, we can quantify the attenuation effect of conventional condoms (read again the quote from Dr. Papa Salif Sow above), the solicitation effect of textured condoms as well as the amplified effect condoms according to this patent, condoms which provide sensations equivalent to natural sensations by creating a texture on the surface of the condoms.

Of course, the stress is progressive when moving from current structured condoms (height of the reliefs of the order of a tenth of a millimeter) to condoms with structures whose dimensions correspond to the thresholds of tactile discrimination (height greater than one millimeter).

Thus, according to our linear evaluation scale, we can assume that between a relief of 0.1 mm in height and a relief of 1 mm in height, the notation should gradually increase from 4 to 10. Note, however, that this progression is not not linear according to the Weber-Fechner law, because according to this law, the sensation of pleasure increases in a logarithmic way when one approaches the thresholds of tactile discrimination.

Manufacture of new types of condoms offering tactile sensations equivalent to natural conditions

Thus, the present invention proposes the manufacture of condoms providing sensations of pleasure equivalent to natural conditions, a manufacture which uses the theory of tactile discrimination thresholds and the technique of dip molding manufacture. According to this patent, structures in relief (2) are made on the surface of the condoms (1); the aforesaid structures in relief (2) have minimum dimensions of 1 mm in height and 3 mm in length, width and spacing, dimensions which correspond to the theoretical thresholds of tactile discrimination at the level of the genital organs; the achievement of the aforementioned tactile discrimination thresholds making it possible to procure sensations of pleasure equivalent to natural conditions, as described .

More specifically, depending on the dimensions of the above structures in relief, the condoms produced according to the invention fall within the following ranges:

• The optimal range (score of 8 to 10 according to our arbitrary scale) corresponds to the production of condoms having structures in relief of at least 1 mm in height and at least 3 mm in length, width and spacing, dimensions which allow reach the theoretical thresholds of tactile discrimination at the level of the genitals. This type of condom provides sensations of pleasure equivalent to those of natural conditions (absence of condom).
• The minimum range (score of 6 to 8 according to our arbitrary scale) corresponds to the production of condoms with structures in relief of at least 0.5 mm in height and 2 mm in length, width and spacing. Even if such dimensions do not make it possible to reach the theoretical thresholds of tactile discrimination, this type of condom makes it possible to provide notably improved sensations of pleasure compared to previous techniques.
• The old range (score from 4 to 6 according to our arbitrary scale) corresponds to the production of smooth condoms (without relief) and structured (with low relief).

It should be noted that the improvement in sensation is progressive between the minimum and optimal conditions and more widely between the old and optimal conditions.

To produce condoms offering a tactile perception equivalent to natural conditions, eight manufacturing methods of the invention are proposed which meet the tactile discrimination criteria stated above. These manufacturing methods modify existing manufacturing methods, in particular around the dip molding manufacturing technique. The last three modes also use inkjet or 3D printing processes.

Application of the invention to different manufacturing methods

The present invention is in no way limited to the embodiments described below and those skilled in the art will know how to add any variant to it in accordance with their spirit.

• Mode 1: FIM (Fabrication Insertion Moulding): Application to a mode of Manufacture by Insertion of topographic elements between two coating layers of the technique of Molding by soaking. ( To ).
• Mode 2: FMS (Manufacturing Salient Patterns): Application to a mode of Manufacture of Salient Patterns or 'pins' according to the manufacturing technique of Molding by dipping ( To ).
• Mode 3: FJM (Fabrication of skirts by molding): Application to a method of manufacturing skirts or rings according to the manufacturing technique of molding by dipping using a grooved mold ( To ).
• Mode 4: FJC (Skirt Manufacturing by Gluing): Application to a Manufacturing mode using a Skirt Gluing technique ( And ).
• Mode 5: FRC (Repli Glue Manufacturing): Application to a Manufacturing mode using a Fold and Glue technique ( To ).
• Mode 6: FNJE (Manufacturing Nodules by Inkjet): Application to a mode of Manufacturing salient topographic elements (nodules) using an Inkjet technique ( To )
• Mode 7: FN3D-JM (Manufacturing Nodules by 3D Material Jetting Printing) - Application to a Nodule Manufacturing Mode using a 'Material Jetting MultiJet Modeling' (MJM) 3D printing process ( , And )
• Mode 8: FN3D-PL (Manufacture of Nodules by Liquid Phase 3D printing) - Application to a method of Manufacturing Nodules according to a 3D printing process in Liquid Phase 'Digital Light Processing' (DLP) ( To )

Let's see the 1st embodiment of the invention.

Mode 1: FIM (Fabrication Insertion Moulding) - Application to a Manufacturing mode according to a technique of Insertion of topographic elements between two coating layers of the Dip Molding method ( To )

According to one of the embodiments of the invention, the ' FIM ' mode, the condoms are made using the dip molding manufacturing technique modified by the insertion of topographic elements (6) between two coating layers (5) and (8) as described .

The present invention thus relates, according to the ' FIM ' mode, to a method of manufacturing condoms using the dip molding technique.

According to this patent, structures in relief are manufactured on the surface of the aforesaid condoms by a method of inserting topographic elements (6) between two coating layers (5) and (8); the aforesaid topographical elements (6) being placed on the latex film (5) before drying which allows the topographical elements (6) to adhere to the film (5); the aforesaid topographical elements (6) being arranged using several distribution devices (7) which hold the elements (6) by means of a vacuum suction system; the aforesaid void being cut when the elements adhere to the film (see And ).

Also according to this patent, the aforesaid topographical elements (6) have dimensions such that the reliefs (2) produced according to this method of manufacture have dimensions which vary from minimum (relief at least 0.5 mm in height and 2 mm in length , width and spacing) to optimal (relief at least 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions (see ).

The following clarifications should be made at the process level:

• The phallic mold (3) used can be a standard smooth cylinder as described or it can be domed as described .
• during a first step of coating a layer (5) as described , we stop at the latex deposition phase before the drying phase.
• in a second step, the topographic elements (6) are placed on the latex film (5) before drying which allows the topographic elements (6) to adhere to the film (5) as described in section and front.
• the topographical elements (6) are arranged using several distribution devices (7) which hold the elements (6) by means of a vacuum suction system, as described . As the layer is not yet dry, the topographic elements adhere to the film.
• according to an advantageous and non-limiting characteristic, the dispensing device (7) holds the elements thanks to a suction system under restricted vacuum, the vacuum being cut off when the elements adhere to the film.
• according to an advantageous and non-limiting characteristic, topographical elements are placed all around the condom using several distribution devices (7) as described (schematic views).
• after deposition/bonding of the devices, the drying and cross-linking phase can be carried out.
• according to an advantageous and non-limiting characteristic, the next step consists in depositing by dipping one or more coating layers such as the layer (8), as described . This step allows the encapsulation of topographic elements.
• after encapsulation deposition, final drying and vulcanization phases are carried out before the final demolding step, which is carried out using high-pressure jets as in the conventional molding process.

The following characteristics should also be specified:

• according to a first embodiment, the topographical elements (6) are made of a latex-based material such as those conventionally used for the production of cat condoms, it is in fact preferable for these elements to have an elongation capacity compatible with that condom itself.
• according to another embodiment of this method of inserting topographic elements (6) between two coating layers (5) and (8) of the dip molding technique, and according to this patent, the material of the topographic elements inserts are latex foam; the aforesaid topographical elements in latex foam having an elongation capacity at least equal to that of the latex of the encapsulation films to avoid possible delamination.
• according to another mode of this process, the phallic mold (3) ( ) is replaced by the manufacturing mold (4) ( ). Indeed, according to this patent, the manufacturing molds are locally widened in the areas where structures in relief will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforementioned structures in relief.
• knowing that the diameter of condoms is generally adjusted to approximately 85% of the diameter of the penis [ Ref.20 ], it can be estimated that the crown of the mold (4) necessary for resistance compensation is of the order of 1 to 2 .5 mm depending on size.
• according to an advantageous and non-limiting characteristic, the first coating step (5) can consist of two successive layers. We then stop before the drying phase of the second layer to glue the topographic elements (6).
• according to an advantageous and non-limiting characteristic, the topographic elements (6) can be conical, cylindrical or rectangular in shape with rounded and/or chamfered edges.

Let's see the 2nd embodiment of the invention.

Mode 2: FMS (Manufacture Salient Patterns) - Application to a mode of Manufacture of salient Patterns or 'pins' according to the manufacturing technique of Molding by dipping ( And )

According to one of the embodiments of the invention, the ' FMS ' mode, the condoms are made using the dip molding manufacturing technique using a structured mold (9) whose dimensions meet the criteria of tactile discrimination set out above.

According to this patent, the dipping mold (9) used for the implementation of the method has holes (10) to (13) making it possible to manufacture projecting patterns (14) to (17); the aforesaid holes having shapes for example conical or cylindrical; the above-mentioned manufacturing process, after deposition and drying of the first layer(s) of latex (5), possibly using a latex foam to fill the holes; the last layer of the aforesaid manufacturing process being carried out with a standard latex for encapsulation, as described And .

According to this patent also, the dimensions of the holes are such that the protruding patterns or 'pins' thus produced have dimensions which vary from minimal (relief at least 0.5 mm in height and 2 mm in length, width and spacing) to optimal. (relief at least 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The following clarifications should be made at the process level:

• according to an advantageous and non-limiting feature, the dip mold is not a smooth cylinder as in conventional dip molding processes. The dipping mold is replaced by a dipping mold (9) which has holes (10) to (13) as in the making it possible to manufacture salient patterns (14) to (17), as in the .
• according to an advantageous and non-limiting characteristic, the mold (9) according to the ' FMS ' mode has holes whose shape allows them to be unmolded. Preferably, the holes are conical or cylindrical, but they can be oblong, blocky, pyramidal, as described . The holes can be for example: conical patterns with a perpendicular arrangement (10) - cylindrical patterns with an angular arrangement (11) - pyramidal, polyhedral patterns (12) - cylindrical patterns (13).
• according to an advantageous and non-limiting characteristic, the aforesaid holes (11) are dug with an angle of inclination, as described .
• according to an advantageous and non-limiting characteristic, the number of soaks is preferably greater than that of prior techniques.
• according to an advantageous characteristic detailed below, several different types of latex can be used for filling the holes.
• in a final phase, the condom is turned over for use with the worked patterns (or 'pimples') pointing outwards as described .
• according to a second mode of this process, the phallic mold (9) is enlarged like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the areas where structures in relief will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforementioned structures in relief.
• knowing that the diameter of condoms is generally adjusted to approximately 85% of the diameter of the penis [ Ref.20 ], it can be estimated that the crown of the mold (4) necessary for resistance compensation is of the order of 1 to 2 .5 mm depending on size.
• according to an advantageous and non-limiting characteristic of the ' FMS ' mode, several different types of latex can be used for filling the holes because the latexes used in the conventional molding methods do not make it possible to fill holes of a millimetric order with the only capillary force.
• according to an advantageous and non-limiting characteristic, the latex used for the first layer(s) is a standard thin layer latex which lines the edges of the holes without filling them.
• according to another mode of this method, the latex used for filling the holes is a latex of the latex foam type with fine porosity.
• according to an advantageous and non-limiting characteristic and in this embodiment, the production of the foam can be carried out according to one of the two known methods: (i) by expansion of a gas or (ii) by separation phenomenon.
• according to an advantageous and non-limiting characteristic and in this embodiment, the aforesaid latex foam comprises several components (latex, surfactant, vulcanizer, additives) allowing the production of a foam with very fine porosity.
• after deposition of the hole-filling layer, the layer is wiped off so that only the hollow areas are filled with porous latex.
• according to an advantageous and non-limiting characteristic and in this embodiment, after polymerization and drying, a thin layer standard latex is used to produce the last layer which will encapsulate the salient patterns produced.
• after encapsulation deposition, final drying and vulcanization phases are carried out before the final demolding step, which is carried out using high-pressure jets as in the conventional molding process.

Let's see the 3rd embodiment of the invention.

Mode 3: FJM (Fabrication Molding Skirts) - Application to a method of manufacturing skirts or rings according to the manufacturing technique of molding by dipping using a grooved mold ( To )

According to one of the embodiments of the invention, the ' FJM ' mode, the condoms are made using the dip molding manufacturing technique using a grooved mold (18) whose dimensions meet the criteria of tactile discrimination set out above.

According to this patent, the dipping mold (18) used for implementing the method has grooves (19) and (20) making it possible to manufacture skirts (21) to (24); the aforesaid manufacturing process being characterized in that, after drying of the first layer or layers of standard latex (5), a latex foam is possibly used to fill the grooves; the last layer of the aforesaid manufacturing process being carried out with a standard latex for encapsulation.

Also according to this patent, the dimensions of the grooves (19) and (20) are such that the skirts have dimensions which vary from minimal (relief at least 0.5 mm in height and 2 mm in length, width and spacing) to optimal (relief at least 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The following clarifications should be made at the process level:

• the dipping mold used (18) is not a smooth cylinder but has grooves (19) and (20) as described To , grooves which make it possible to manufacture skirts (21) to (24) as described To (Note that the diagrams are not to scale).
• the number of dippings is greater than that of conventional molding techniques.
• after drying of the first layer or layers of standard latex (5), a different latex is used to fill the grooves, namely a latex of the latex foam type with fine porosity; the last layer being made with a standard latex for encapsulation.

• in a final phase, the condom is turned over for use with the skirts (21) to (24) pointing outward as described To .

More precisely, the process according to the ' FJM ' mode:

• according to another mode of this process, the grooves (19) and (20) can be continuous, their width then being equal to the perimeter of the condom as in the (sectional view), or the grooves may be discontinuous as in the (front view).
• according to an advantageous and non-limiting characteristic, the width of the aforesaid grooves allows the filling of the grooves by the latex according to a phenomenon of capillarity.
• according to an advantageous and non-limiting characteristic, the grooves (20) are dug with an angle varying between 10 and 45°, as described in the .
• according to an advantageous and non-limiting characteristic, the depth of the aforesaid grooves (19) and (20) can be of the order of half of the tactile thickness discrimination threshold, the other dimensions of the skirts remaining of the order of the thresholds of discrimination, because the skirts (21) to (24), as described in the , will be folded during their functional use and this will double the perception of their thickness.
• according to an advantageous and non-limiting characteristic, one to several additional dippings make it possible to fill the grooves and to obtain a mechanically resistant skirt.
• according to an advantageous and non-limiting characteristic, the aforesaid grooves do not have a constant depth, the edges being shallower in order to improve mold release and to offer sufficient resistance to tearing during the future elongation of the condom.
• according to an advantageous and non-limiting characteristic, the aforesaid grooves can form a complete ring around the condom. After reversing the condom, we then obtain annular skirts or rings (22) as in the .
• according to an advantageous and non-limiting characteristic, the aforesaid grooves may not form a complete ring around the condom, but make it possible to produce discontinuous skirts (23) and (24) as described And (remember that the diagrams are not to scale).

• according to a second mode of this process, the phallic mold (18) is enlarged like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the areas where structures in relief will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforementioned structures in relief.

• knowing that the diameter of the condoms is generally adjusted to approximately 85% of the diameter of the penis [ Ref.20 ], it can be estimated that the crown of the mold necessary for the compensation of resistance is of the order of 1 to 2.5 mm depending on the size.

• according to an advantageous and non-limiting characteristic of the ' FJM ' mode, after drying of the first layer or layers of standard latex, a different latex can be used to fill the grooves, namely a latex of the latex foam type, the last layer being made with a standard latex for encapsulation.
• after encapsulation deposition, final drying and vulcanization phases are carried out before the final demolding step, which is carried out using high-pressure jets as in the conventional molding process.

Let's see the 4th embodiment of the invention.

Mode 4: FJC (Fabrication Skirts Bonding) - Application to a Manufacturing mode according to a technique of Bonding Skirts ( And )

According to one of the embodiments of the invention, the mode ‘FJC’, the condoms are made from a prefabricated condom (1) placed on its mold at the end of the conventional molding process and before its detachment. According to this patent, skirts (25), for example made of latex, are glued to the condom (1) using an adhesive (26) comprising at least one biocompatible elastomer and at least one solvent, as shown And (remember that the diagrams are not to scale).

Also according to this patent, the structures in relief, here the glued skirts (25), have dimensions which vary from minimal (relief at least 0.5 mm thick and 2 mm in length, width and spacing) to optimal (relief minimum of 1 mm in thickness and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The following clarifications should be made at the process level:

• according to an advantageous and non-limiting characteristic, the support is an existing condom (1) placed on its mold at the end of the conventional molding process.
• according to an advantageous and non-limiting characteristic, the skirts (25) are preferably made of the same material as the condom or of latex or of an elastomer having elongation capacities at least equal to that of conventional latexes.
• according to an advantageous and non-limiting characteristic, the skirts form a ring around the condom.
• according to an advantageous and non-limiting characteristic, the skirts (25) do not form a continuous ring around the condom in order to avoid bringing too much elastic resistance provided by the gluing of the patterns on the surface of the support condom.
• knowing that the diameter of condoms is generally adjusted to approximately 85% of the diameter of the penis [ Ref.20 ], it can be estimated that the crown of the mold (4) necessary for resistance compensation is of the order of 1 to 2 .5 mm depending on size.
• according to another advantageous and non-limiting characteristic, the skirts (25) are glued over a fraction of the length of the skirt with a thickness and height of glue (26) as shown (remember that the diagrams are not to scale).

• according to an advantageous and non-limiting characteristic, the thickness of the skirts (25) may possibly be less than a millimeter because the skirts thus produced, as described , will be folded up during their functional use and will double the dimensional perception.
• according to an advantageous and non-limiting characteristic, the annular arrangement of the skirts is characterized in that it returns the repeated perception of several unfoldings of the foreskin.
• according to another mode of this method, the prefabricated condom (1) is manufactured on an enlarged mold like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the zones where the skirts (25) will be glued to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforementioned structures in relief.
• after encapsulation deposition, final drying and vulcanization phases are carried out before the final demolding step, which is carried out using high-pressure jets as in the conventional molding process.

Let's see the 5th embodiment of the invention.

Mode 5: FRC (Repli Glue Manufacturing) - Application to a Manufacturing mode using a Fold and Glue technique ( To )

According to one of the embodiments of the invention, the ' FRC ' mode, the condoms are made from a prefabricated condom (1), for example using the dip molding technique, and placed on a mold (27). Certain parts of the condom are then folded over and glued on themselves so as to form skirts (32).

According to this patent, the aforesaid condom (1) is arranged on a grooved mold (27) which comprises a central suction channel (28) and tree-like channels connected to the grooves (29) which allow localized suction of the condom in the grooves (29) to form skirts (32); the aforesaid skirts thus formed being bonded using an adhesive (30) comprising at least one biocompatible elastomer and at least one solvent; after gluing, the assembly being dipped in a latex which forms an encapsulation layer (31); during demolding, the vacuum being replaced by positive pressure to eject the condom.

Also according to this patent, the structures in relief, here the skirts (32), thus formed have dimensions which vary from minimal (relief at least 0.5 mm thick and 2 mm in length, width and spacing) to optimal ( relief at least 1 mm thick and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

NB: In the diagrams To , only one groove has been shown.

Also remember that the diagrams are not to scale.

The following clarifications should be made at the process level:

• according to an advantageous and non-limiting characteristic, the initial support is an existing condom (1) previously placed on a grooved mold (27).
• according to this patent, the mold (27) is not a smooth cylinder but a grooved mold comprising a central suction channel (28) and tree-like channels connected to the grooves (29) which allow localized suction of the condom in the grooves (29) to form skirts (32), as shown schematically in the (sectional view of the mould).
• according to an advantageous and non-limiting characteristic, parts of the condom (1) are folded over and glued to the latter so as to form skirts (32).
• according to an advantageous and non-limiting characteristic, once aspirated as in the , the skirts thus formed are glued using a biocompatible latex-based elastomer glue (30), as in the .

• the aforesaid glue (30) is suitable for bonding the material of the condom to itself and has a fluidity allowing its diffusion.
• according to a first mode, the aforesaid glue (30) is of biocompatible quality after drying because it will possibly be in contact with the skin.
• according to a second mode, the aforesaid glue (30) is not of biocompatible quality, because after gluing the assembly is soaked in a latex which forms an encapsulation layer (31) as in the .
• after drying and turning the condom over, annular skirts (32) are obtained as shown schematically .
• during demolding, the vacuum is advantageously replaced by positive pressure to eject the condom.
• according to an advantageous and non-limiting characteristic, the aforesaid grooves can be dug with an angle varying between 10 and 45°.
• according to several advantageous and non-limiting characteristics, the glue (30) is: (1°) suitable for gluing the material from which the condom is made on itself, (2°) of a fluidity allowing its diffusion in the skirt as in the , (3°) of biocompatible quality or not depending on whether a final layer of latex encapsulates the assembly.

• according to another mode of this method, the prefabricated condom (1) is manufactured on an enlarged mold like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the zones where the skirts (32) will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforementioned structures in relief.
• after encapsulation deposition, final drying and vulcanization phases are carried out before the final demolding step, which is carried out using high-pressure jets as in the conventional molding process.

Let's see the 6th embodiment of the invention.

Mode 6: FNJE (Manufacture Nodules by Inkjet) - Application to a mode of Manufacture of Nodules according to an Inkjet technique ( To )

According to one of the embodiments of the invention, the '' FNJE ' mode, the condoms are manufactured using the ink-jet printing technique.

According to this patent, nodules (34) are made on a condom (1) using an inkjet printing process; the aforesaid inkjet printing method using a two-component resin comprising at least one polymer, for example a silicone polymer, projected by nozzles (36) and a second component comprising at least one crosslinking agent projected by nozzles (37).

Also according to this patent, the structures in relief, here the nodules (34), thus formed have dimensions which vary from minimal (relief at least 0.5 mm in height and 2 mm in length, width and spacing) to optimal (relief minimum of 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The ' FNJE ' mode therefore uses an inkjet printing process to manufacture condoms with the following particularities:

• during a first step, the condom is made using the conventional molding technique and after the vulcanization and rinsing steps, the condom (1) remains on its phallic support (33) as shown .
• according to an advantageous and non-limiting characteristic, a step of preparing the surface of the condom is possibly required to improve the adhesion of the nodules (34) to the condom (1).
• a second step consists in using the inkjet technique to form nodules (34) on the condom (1) as shown schematically .
• according to one of the embodiments of the invention, the inkjet printing method uses at least one dispensing device (35) comprising a plurality of printing nozzles (36) and (37) as shown schematically and which allows the projection of drops on the surface of the condom.
• according to an advantageous and non-limiting characteristic, the inkjet printing process uses a set of double nozzles (36) and (37), as shown schematically , one of which projects a resin, for example a silicone polymer, and the other projects a crosslinking agent at the same place to form a drop of bi-component which will crosslink (polymerize).
• according to an advantageous and non-limiting feature, the inkjet printing process projects a sufficient quantity of resin and crosslinking agent to produce drops of the required size in a single print.
• the projected drops form after crosslinking (hardening) nodules (34) on the condom (1) as shown schematically .
• according to one of the embodiments of the invention, after deposition and crosslinking of the nodules (34), final post-polymerization and washing phases are carried out before the final demolding step which is carried out using high pressure jets as in the conventional molding process.
• according to an advantageous and non-limiting characteristic, the condom being intended to be in contact with the skin, the material projected during the inkjet printing is biocompatible and hypoallergenic.
• according to an advantageous and non-limiting characteristic, the polymer-based composition comprises at least one polymer of elastomeric nature, for example a silicone polymer, capable of deforming during use of the condom while adhering to the condom.
• according to another embodiment of the invention, the polymer used may be a polyisoprene, or a polyurethane, or for example a butadiene-acrylonitrile copolymer.

More precisely, the process according to the ' FNJE ' mode:

• according to an advantageous and non-limiting characteristic, the nodules can be projected, as described : (i) in a line or staggered design, provided that the spacing distance is respected for a nodular tactile perception or (ii) in such a way as to form a continuous line for a beaded tactile perception, giving a sensation of unrolled foreskin.
• according to an advantageous and non-limiting characteristic, a first component of the resin comprises at least one elastomeric polymer, for example a silicone polymer, and a second component comprises at least one crosslinking agent and possibly other components such as surfactants, stabilizers , lubricants, dyes, antibacterial agents, aphrodisiac agents, perfumes or vasodilators.
• according to another mode of this method, the prefabricated condom (1) is manufactured on an enlarged mold like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the zones where structures in relief, here the nodules (34), will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforesaid relief structures.

Let's see the 7th embodiment of the invention.

Mode 7: FN3D-JM (Manufacturing Nodules by 3D Material Jetting Printing) - Application to a mode of Manufacturing Nodules according to a 3D printing process by material jetting 'Material Jetting MultiJet Modeling' (MJM) ( , And )

According to one of the embodiments of the invention, the ' FN3D-JM ' mode, the condoms are manufactured using the material jet 3D printing technique.

Classically, the 3D printing process by material jet or 'Material Jetting MultiJet Modeling' (M.J.M.), makes it possible to deposit layers of photopolymer resin drop by drop, as for a traditional inkjet printer, with the difference that an ultraviolet treatment is applied to each deposited layer to harden the material.

The present invention therefore relates, according to the ' FN3D-JM ' mode, to the manufacture of condoms using a 3D printing process by material jet.

According to this patent, nodules (40) are made on a condom (1) using a 3D printing process by material jet; the aforesaid method of 3D printing by material jet using a set of nozzles (39) projecting drops of UV photo-polymerizable resin (40) and a UV exposure device (41) which makes it possible to photo-crosslink the drops thus projected; the aforesaid UV photo-polymerizable resin comprising at least one polymer, for example a silicone polymer, and at least one second component such as a photo-crosslinking agent.

According to this patent also, the structures in relief, here the nodules (40), thus formed have dimensions which vary from minimal (relief at least 0.5 mm in height and 2 mm in length, width and spacing) to optimal (relief at least 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The present invention therefore uses a 3D printing process by material jetting or ‘Material Jetting MultiJet Modeling’ (M.J.M.), for the manufacture of condoms with the following particularities:

• during a first step, the condom is made using the conventional molding technique and after the vulcanization and rinsing steps, the condom (1) remains on its phallic support (33) as shown .
• according to an advantageous and non-limiting characteristic, a step of preparing the surface of the condom is possibly required to improve the adhesion of the nodules (40) to the condom (1).
• a second step consists in using the material jet 3D printing technique to form nodules (40) on the condom (1) as shown schematically .
• according to one of the embodiments of the invention, the material jet 3D printing method uses at least one dispensing device (38) comprising a plurality of printing nozzles (39) as shown schematically and which allows the projection of drops on the surface of the condom (1).
• in a next step, a UV exposure device (41) makes it possible to photo-crosslink (and therefore harden) the drops of resin projected as shown schematically .
• according to a variant of the embodiment of the invention, the 3D printing process by material jet builds the nodules (40) by successive projections of small drops followed by photo-crosslinking steps until the formation of the nodules.
• according to one of the embodiments of the invention, after deposition and crosslinking/hardening of the nodules (40), final washing phases are carried out before the final demolding step which is carried out using jets at high pressure as in the conventional molding process.
• according to an advantageous and non-limiting characteristic, the condom being intended to be in contact with the skin, the material projected during 3D printing by material jet is biocompatible and hypoallergenic.
• according to an advantageous and non-limiting characteristic, the aforesaid UV photo-polymerizable resin comprises at least one elastomeric nature polymer, that is to say capable of deforming during the use of the condom while adhering to the condom.
• according to an advantageous and non-limiting characteristic, the composition used is possibly a UV photo-polymerizable resin comprising at least one polymer, for example a silicone polymer, and at least one second component such as a UV-reactive photo-crosslinking agent . Other components can also be added which will be described later.
• according to another embodiment of the invention, the polymer used may be a polyisoprene, or a polyurethane, or for example a butadiene-acrylonitrile copolymer.
• according to one of the embodiments of the invention, after deposition and crosslinking of the nodules (40), final post-polymerization and washing phases are carried out before the final demoulding step which is carried out using high pressure jets as in the conventional molding process.

More precisely, the process according to the ' FN3D-JM ' mode:

• according to an advantageous and non-limiting characteristic, the nodules (40) can be projected (i) according to a line design or in a staggered manner, provided that the spacing distance is respected for a nodular tactile perception beyond the discrimination thresholds tactile or (ii) in such a way as to form a continuous line for a tactile perception of a bulge, giving a sensation of unrolling the foreskin (see ).
• according to an advantageous and non-limiting characteristic, the UV photo-polymerizable resin comprises at least one polymer, for example a silicone polymer, and at least one second component such as a photo-crosslinking agent and possibly other components such as surfactants, stabilizers, lubricants, dyes, antibacterial agents, aphrodisiac agents, perfumes or vasodilators.
• according to another mode of this method, the prefabricated condom (1) is manufactured on an enlarged mold like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the zones where structures in relief, here the nodules (40), will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforesaid relief structures.

Let's see the 8th embodiment of the invention.

Mode 8: FN3D-PL (Manufacture of Nodules by Liquid Phase 3D printing) - Application to a method of Manufacturing Nodules according to a 3D printing process in Liquid Phase 'Digital Light Processing' (DLP) ( To )

According to one of the embodiments of the invention, the ' FN3D-PL ' mode, the condoms are manufactured using the liquid phase additive 3D printing technique.

The ‘Digital Light Processing’ (DLP) additive manufacturing process is based on a photo-polymerization process. A liquid photosensitive resin, contained in a tank of the 3D printer, is polymerized, layer by layer, by UV rays from a light source. Photosensitive resins are generally two-component products based on epoxy resin, polyurethane, acrylic or silicone. The deposited thicknesses of each layer range, depending on the materials and the precision sought, from 25 microns to 1 millimeter.

The present invention relates, according to the ‘F.N.3D-P.L.’ manufacturing method (Manufacturing Nodules by Liquid Phase 3D printing), to the manufacture of condoms using an additive 3D printing process in the Liquid Phase.

According to this patent, nodules (45) are made on a condom (1) using an additive Liquid Phase 3D printing process; the aforesaid method of additive 3D printing in Liquid Phase using a plurality of transparent tanks (42) which make it possible to carry out the simultaneous printing of a plurality of condoms (1) by means of a plurality of light exposure devices Ultra Violette (44) placed on either side of the tanks (42); the aforesaid phallic supports (33) undergoing, after a first stage of insolation, a 90 degree rotation making it possible to print the perpendicular faces in a second stage.

Also according to this patent, the structures in relief, here the nodules (45), thus formed have dimensions which vary from minimal (relief at least 0.5 mm in height and 2 mm in length, width and spacing) to optimal (relief at least 1 mm in height and 3 mm in length, width and spacing), dimensions which make it possible to reach the theoretical thresholds of tactile discrimination at the level of the genital organs and to provide sensations of pleasure equivalent to natural conditions.

The present invention thus relates, according to the ' FN3D-PL ' mode, to the known liquid phase additive 3D printing process 'DLP', with the following main specific differences:

• during a first step, the condom is made using the conventional molding technique, but after the vulcanization and rinsing steps, the condom (1) remains on its phallic support (33) as shown .
• according to an advantageous and non-limiting characteristic, a step of preparing the surface of the condom is possibly required to improve the adhesion of the nodules (45) to the condom (1).
• a second step consists in using the liquid phase additive 3D printing technique ‘D.L.P.’ to form nodules of size close to or greater than the tactile discrimination thresholds.
• according to one of the embodiments of the invention, the next step consists in leaving the condom (1) on its phallic support (33) and moving the assembly automatically towards the 3D printing unit 'D.L.P '.
• a next step consists in dipping the condom assembly (1) and phallic support (33) in a liquid photosensitive resin (43), for example based on silicone, as represented .
• according to one of the embodiments of the invention, the 'DLP' 3D printing process uses a tank transparent to UV rays of cylindrical shape (42) surrounding the condom assembly (1) on its phallic support (33) as depicted .
• according to an advantageous and non-limiting characteristic, the nodules are printed simultaneously on the condom using an appropriate design, for example such as .
• a plurality of transparent tanks (42) allows the simultaneous printing of a plurality of condoms (1) by means of a plurality of UV exposure devices (44) in a reduced space.
• a plurality of condoms can be printed simultaneously using a plurality of digital screen projectors (44) placed on either side of a row of vats (42) as shown .
• after exposure of the exposed faces as shown schematically , the phallic supports (33) are rotated 90 degrees in order to print the perpendicular faces not yet exposed.
• according to a variant of the embodiment of the invention, the ‘D.L.P.’ 3D printing process builds nodules (45) in a single exposure
• according to another variant of the embodiment of the invention, the 'DLP' 3D printing process builds nodules (45) by successive exposure of several layers of width or diameter narrowing until the formation of pyramidal nodules as shown schematically .

• according to one of the embodiments of the invention, after photo-crosslinking of the nodules (45), final post-polymerization and washing phases are carried out before the final demoulding step which is carried out using high pressure jets as in the conventional molding process.

Specifically, the method according to the F.N.3D-PL mode ':

• according to an advantageous and non-limiting characteristic, since the condom is intended to be in contact with the skin, the residual material after 3D photo-crosslinking is biocompatible and hypoallergenic.
• according to an advantageous and non-limiting characteristic, the nodules (45) can be projected (i) according to a line design or in a staggered manner, provided that the spacing distance is respected for a nodular tactile perception beyond the discrimination thresholds tactile or (ii) in such a way as to form a continuous line for a tactile perception of a bulge, giving a sensation of unrolling the foreskin (see ).
• according to another mode of this method, the prefabricated condom (1) is manufactured on an enlarged mold like the mold (4) of the . Indeed, according to this patent, the manufacturing molds are locally widened in the zones where structures in relief, here the nodules (45), will be created to counterbalance the increase in local elastic resistance induced by the thickness and the rigidity of the aforesaid relief structures.

BRIEF DESCRIPTION OF FIGURES

Other characteristics and advantages of the present invention will become apparent from the description given below, with reference to the appended drawings which illustrate an example of embodiment devoid of any limiting character. In the Figures, note that the diagrams are not to scale.

offers several diagrams of structures in relief (2) made on the surface of condoms (1).

shows a sectional view of the mold (3) used in the FIM manufacturing mode (Fabrication Insertion Molding).

represents another type of mold (4) with curves.

describes the first so-called coating step according to the FIM manufacturing method

describes, in cross-section, the second step of the FIM mode, the so-called placement/gluing of objects step (6).

describes the second step of the FIM mode, front view of the gluing side (in the example presented the inserted objects are of cylindrical shape).

describes the third stage of the encapsulation FIM mode (8) seen in section.

shows a sectional view of the step of bonding the objects (6) to the lower layer (5) before drying and a sectional view of the dispensing device (7).

describes the FMS manufacturing method (Fabrication Saillants Motifs) and represents a sectional view of the mold (9) with different shapes of holes (conical holes in perpendicular arrangement (10) - conical holes in angular arrangement (11) - pyramidal, polyhedral holes (12) - cylindrical holes (13)).

shows the condom after turning according to the FMS manufacturing method, with a sectional view of the elements (14) to (17) and with a filling using several types of latex.

shows a sectional view of the mold (18) with grooves (19) used in the FJM manufacturing method (Fabrication Skirts Molding).

shows a front view of the mold with discontinuous grooves (19).

shows a front view of the mold with discontinuous inclined grooves (20).

describes the final appearance of the skirts according to the FJM manufacturing method (Fabrication Skirts Molding), in a sectional view of the condom (5) with its skirts (21).

shows a front view of annular skirts (rings) (22).

shows a front view of discontinuous skirts (23).

shows a front view of skirts (24) in an inclined arrangement.

shows a schematic sectional view of a skirt (21) folded on itself.

describes the final appearance of the skirts according to the FJC manufacturing method (Fabrication Skirts Bonding) and shows a front view of the skirts (25) glued to the condom (1).

shows a sectional view of a skirt (25) glued with an adhesive (26).

shows a sectional view of the mold (27) with suction channels (28) and grooves (29) according to the FRC (Fabrication Repli Bonding) manufacturing method.

shows a sectional view of the suction step of the condom (1).

shows a sectional view of the step of injecting an adhesive (30).

shows a sectional view of the bonding step by depositing a layer of latex (31).

shows a sectional view of the condom with skirts (32) after reversal.

shows a sectional view of a condom (1) on its phallic support (33) at the end of manufacture according to the conventional molding technique.

shows a sectional view of the nodules (34) in the shape of a drop, made on a condom (1) resting on its manufacturing support (33).

shows a sectional view of the ' FNJE ' inkjet printing process using at least one dispensing device (35) comprising a plurality of double printing nozzles (36) and (37) for spraying a bi-resin -making up.

shows a sectional view of the 3D printing process by material jet according to the ' FN3D-JM ' mode, using at least one distribution device (38) comprising a plurality of printing nozzles (39).

represents a cross-sectional view of the photo-crosslinking step of the nodules (40) according to the ' FN3D-JM ' mode, using at least one exposure device (41).

represents the step of immersing the condom (1) in a liquid photosensitive resin (43) according to the ' FN3D-PL ' manufacturing method, using a DLP liquid phase 3D printing process

shows a sectional view of the printing step, according to the ' FN3D-PL ' manufacturing method, using a plurality of digital screen projectors (44) placed on either side of a row of tanks (42 ) and performing a 90 degree rotation of the supports (33) in order to print the perpendicular faces.

shows a sectional view of nodules (45) of pyramidal shape, produced on a condom (1) resting on its manufacturing support (33), according to the ' FN3D-PL ' manufacturing method.

Claims (10)

A method of manufacturing condoms using the tactile discrimination threshold theory and the dip molding manufacturing technique, characterized in that relief structures (2) are formed on the surface of the condom (1); the aforesaid relief structures (2) having minimum dimensions of 1 mm in height and 3 mm in length, width and spacing, dimensions which correspond to the theoretical thresholds of tactile discrimination at the level of the genital organs; the achievement of the aforementioned thresholds of tactile discrimination making it possible to provide sensations of pleasure equivalent to natural conditions. Process for the manufacture of condoms according to claim 1 using the dipping molding technique, characterized in that structures in relief (2) are manufactured on the surface of the aforesaid condoms by a process of inserting topographic elements (6) between two coating layers (5) and (8); the aforesaid topographical elements (6) being placed on the latex film (5) before drying which allows the topographical elements (6) to adhere to the film (5); the aforesaid topographical elements (6) being arranged using several distribution devices (7) which hold the elements (6) by means of a vacuum suction system; the aforesaid void being cut when the elements adhere to the film. Process for the manufacture of condoms according to claim 1 using the dip molding technique, characterized in that a dip mold (9) is used for the implementation of the process; the aforesaid dipping mold having holes (10) to (13) making it possible to manufacture projecting patterns (14) to (17); the aforesaid holes having shapes for example conical or cylindrical; the aforesaid manufacturing process, after deposition and drying of the first layer(s) of latex (5), using a latex foam to fill the holes; the last layer of the aforesaid manufacturing process being carried out with a standard latex for encapsulation. Process for the manufacture of condoms according to claim 1 using the technique of dipping molding, characterized in that a dipping mold (18) is used for the implementation of the method; the aforesaid dipping mold having grooves (19) and (20) making it possible to manufacture skirts (21) to (24); the aforesaid manufacturing process being characterized in that, after drying of the first layer or layers of standard latex (5), a latex foam is used to fill the grooves; the last layer of the aforesaid manufacturing process being carried out with a standard latex for encapsulation. Process for the manufacture of condoms according to claim 1 using the dipping molding technique, characterized in that, at the end of the molding process, skirts (25), for example made of latex, are glued onto the condom (1) at using an adhesive (26) comprising at least one biocompatible elastomer and at least one solvent. Method of manufacturing condoms according to claim 1 using a prefabricated condom, for example using the dipping molding technique, characterized in that the aforesaid condom (1) is arranged on a grooved mold (27) which comprises a channel central suction (28) and tree-like channels connected to the grooves (29) which allow localized suction of the condom into the grooves (29) to form skirts (32); the aforesaid skirts thus formed being bonded using an adhesive (30) comprising at least one biocompatible elastomer and at least one solvent; after gluing, the assembly being dipped in a latex which forms an encapsulation layer (31); during demolding, the vacuum being replaced by positive pressure to eject the condom. Method of manufacturing condoms according to Claim 1 using the ink-jet technique, characterized in that nodules (34) are made on a condom (1) using an ink-jet printing method. ink ; the aforesaid inkjet printing process using a two-component resin comprising at least one polymer,
for example a silicone polymer, projected by nozzles (36) and a second component comprising at least one crosslinking agent projected by nozzles (37). Process for manufacturing condoms according to claim 1 using the 3D printing technique with material jet, characterized in that nodules (40) are produced on a condom (1) using a 3D printing process by jet of material; the aforesaid method of 3D printing by material jet using a set of nozzles (39) projecting drops of UV photo-polymerizable resin (40) and a UV exposure device (41) which makes it possible to photo-crosslink the drops thus projected; the aforesaid UV photo-polymerizable resin comprising at least one polymer, for example a silicone polymer, and at least one second component such as a photo-crosslinking agent. Process for the manufacture of condoms according to claim 1 using the liquid phase additive 3D printing technique, characterized in that nodules (45) are produced on a condom (1) using a printing process Additive 3D in Liquid Phase; the aforesaid method of additive 3D printing in Liquid Phase using a plurality of transparent tanks (42) which make it possible to carry out the simultaneous printing of a plurality of condoms (1) by means of a plurality of light exposure devices Ultra Violette (44) placed on either side of the tanks (42); the aforesaid phallic supports (33) undergoing, after a first exposure step, a 90 degree rotation allowing the perpendicular faces to be printed in a second step. Dipping mold according to any one of the preceding claims, characterized in that the diameter of the aforesaid dipping mold is locally enlarged by 1 to 2.5 mm in the zones where structures in relief are created; the aforesaid localized widening making it possible to counterbalance the increase in local elastic resistance induced by the aforesaid structures in relief.