baber/WOPTO huggingface dataset:
Patent FR-2519966-A1 (FR)
Title: Spray disposal of polluted effluent into heat fermented humus - recuperates heat from condensed vapour to preheat air for fermenting chamber
IPC: C02F3/04
Filed: 1982-01-15
Abstract: Appts. is claimed for the disposal of highly polluted effluent and the prodn. of humus. The effluent is percolated through a bed of organic, partic. cellulosic, waste counter current to a stream of heated air rising through the bed. Vapour rising from the bed is condensed and the condensate is circulated through the battery of a heat exchanger to pre-heat air to be blown through the bed. Used for disposing of highly conc. industrial effluent combined with the bio-digestion of organic, partic. cellulosic waste. Humus for agricultural fertilisation is produced by fermentation of the waste fortified with residue from the effluent. Appts. is partic. suitable for handling effluent from factories using evapn. for thermal concn. The effluent is eliminated with polluting the atmos. with an objectionable smell. The prodn. of humus is made viable by recycling heat of condensate to preheat incoming air.
Patent FR-2498942-A1 (FR)
Title: Appareil de chromatographie continue a contre-courant
Inventor: ITO YOICHIRO
IPC: B01D11/04
Filed: 1982-02-02
Abstract: L'INVENTION CONCERNE UN APPAREIL DE CHROMATOGRAPHIE PREPARATIVE A CONTRE-COURANT. UN MOTEUR 17 ENTRAINE DIRECTEMENT UN CHASSIS ROTATIF 20-25 PORTANT DES COLONNES 22 FORMANT UN ARRANGEMENT EQUILIBRE AUTOUR DE L'AXE 28 DE ROTATION. LES COLONNES SONT MONTEES EN SERIE. UN ARBRE AUXILIAIRE 35 MONTE SUR LE CHASSIS FAIT TOURNER L'ENSEMBLE A COLONNES A UNE VITESSE EGALE AU DOUBLE DE CELLE DU CHASSIS ET DANS LE MEME SENS, SI BIEN QU'AUCUN JOINT ROTATIF N'EST NECESSAIRE DANS LES TUBES 40, 41 DE CIRCULATION. L'ENSEMBLE A COLONNES EST EQUILIBRE ET NE NECESSITE AUCUN CONTREPOIDS. APPLICATION A LA PREPARATION DE PRODUITS CHIMIQUES SEPARES PAR CHROMATOGRAPHIE.
Patent FR-2521994-A1 (FR)
Inventor: KERVENNAL JACQUES
IPC: C07D263/58
Filed: 1982-02-23
Abstract: Process for the preparation of 2-benzoxazolone and derivatives by the reaction, in the liquid phase, at a temperature from 100 DEG to 500 DEG C. and a pressure from 20 to 500 bars, of an ortho-nitrophenol of the formula: in which R represents a hydrogen or halogen atom, an alkyl group containing from 1 to 10 carbon atoms or an alkoxy group OR' in which R' represents an alkyl group containing from 1 to 10 carbon atoms, and carbon monoxide under pressure, characterized in that the process is carried out in the presence of a. a supported catalyst formed by the association of a noble metal of Group VIII and a second transition metal selected from Groups, Vb, VIb or VIII of the Periodic Classification, in the metallic or oxide form, and b. a nitrogenous heteroaromatic base; the process may be carried out in the presence of a solvent.
Patent FR-2522462-A1 (FR)
Title: Rotary soil working tool - has adaptor plate on vertical driving shaft with three tines sloping at different angles
Inventor: BERDRIN ALBERT
IPC: A01B33/14
Filed: 1982-03-05
Abstract: The soil working tool for an agricultural machine uses an adaptor plate (11) with a boss at the centre, with a hole through, having serrations around the inside so that it can be positively locked onto a vertical driving spindle. The plate is polygonal, with three edges equally spaced around it, each with a tool carrier plate (22) attached to it. One plate is connected at right angles, and the other two slope at an acute angle to the vertical. One plate slopes at an angle between O and 25 deg. and the other slopes at an angle between 10 and 40 deg. Each plate has holes (30) for bolts which secure a digging tool, the three tools sloping at different angles. This assists the operation of the machine and the action of the tools in the soil.
Patent FR-2530787-A1 (FR)
Title: High-efficiency greenhouse-effect solar collector.
Inventor: LOUIS SOLANGE
IPC: F24S23/30
Filed: 1982-03-11
Abstract: High-efficiency greenhouse-effect solar collector characterised by a transparent surface consisting of a succession of hollow dihedrals, the inner walls of which are also lined with grooves in the shape of triangular prisms, which arrangements eliminate the majority of losses through internal or external reflection. These hollow dihedrals are filled with black metal chips which are heated by the sun and impart their heat to a stream of air which itself heats a tube through which a heat-transfer liquid passes. The air cooled in this way is recycled through a corridor situated underneath the body of the collector, which permits operation at a higher temperature. The collector can have its hollow dihedrals aligned on a convex base in order to preserve its efficiency at the extreme positions of the sun.
Patent FR-2502813-A1 (FR)
Inventor: KUTSCHERA KARLHEINZ
IPC: G05D23/19
Filed: 1982-03-25
Abstract: In heating systems which have a plurality of, in particular more than two, heat sources for heating the heat carrier, there is a need for a multivalent changeover switch (B) which is used to determine as a function of a temperature criterion the number of heat sources required to provide the necessary heating capacity. Switching on and off one of the heat sources has so far been made a function of a fixed temperature criterion, in particular the outside temperature. Since, in this case, no account is taken of important parameters such as insolation or wind speed, such a heating system is operated uneconomically. According to the invention, a further heat source is switched in whenever a difference value (D) undershoots a fixed switch-in limit value (-Z) of a first tolerance band, the difference value (D) representing the difference (S1-S2) of a first and a second integration value (S1, S2), and the first integration value being obtained by integrating a standard signal (I'') with respect to time over the first intervals in which the actual temperature value ( theta i) of the heat carrier is greater than the upper limit value ( theta 2) of a second tolerance band containing the desired temperature value ( theta s), and the second integration value (S2) is obtained by integrating the standard signal (I-'') with respect to time over the second time intervals in which the actual temperature value ( theta i) of the heat carrier is less than the lower limit value ( theta 1) of the second tolerance band.
Patent FR-2524036-A1 (FR)
Title: Bulk construction work for dwellings - has shaped foundation beam taking floor beam and frame
IPC: E04B1/00
Filed: 1982-03-23
Abstract: The concrete masonry foundation beam has a base plate (1), a vertical part (2), a cantilever part (3) and a head (4). A floor beam (5) is placed on the head with an interposed joint (6). Insulating bitumen felt (7) is placed to cover the top horizontal face (8) and side (9) of the floor beam, the vertical face (10) of the head and the horizontal face (11) of the cantilever. A vertical metal framework (12) of columns thrusts against the vertical faces of the floor beam and head. Composite material insulation boards (13) sit on the horizontal face of the cantilever.
Patent FR-2502976-A1 (FR)
Inventor: PRIESTLEY ANTHONY JOHN
IPC: C02F1/52
Filed: 1982-04-06
Abstract: A process is described for regenerating and recovery of a loaded adsorption medium, in which: (a) the loaded adsorption medium is brought into contact, for a time sufficient for its regeneration, with an alkaline solution; (b) the suspension obtained of the adsorption medium in the alkaline solution is diluted with returned overflow liquid from one or both subsequent separation stage(s), to reduce the concentration of the adsorption medium in the suspension to at least a value at which unhindered settling occurs; (c) the suspension is separated into a first liquid overflow and a first solids effluent with the adsorption medium; at least a portion of the first liquid overflow is rejected and the remainder (of the first liquid overflow) which may still be present is returned to stage (b); (d) the first solids effluent from stage (c) is suspended with wash water and a returned second liquid overflow from the following separation stage; (e) the resulting suspension is separated into a second liquid overflow and a second solids effluent with the adsorption medium, and a portion of the liquid overflow is returned to stage (d) and the remainder (of the second liquid overflow) into stage (b), and (f) the second solids effluent containing the regenerated and washed adsorption medium is collected.
Patent FR-2527765-A1 (FR)
Title: Measuring probe with stylet support resting on circular edge - detects movement of support w.r.t. edge by sensing electrical connection between screw and contact
Inventor: BORDIER CLAUDE
IPC: G01B7/012
Filed: 1982-05-27
Abstract: The measuring appts. probe has a cylindrical case with a cover plate delimiting a cylindrical chamber within the case. A stylet support is mounted inside the chamber and rests in the case on a seat provided by the plane face of the cover plate by the intermediary at a circular edge around which it is able to turn. The stylet support is annular in shape and has its central part prolonged by a tubular portion which passes out of the chamber through a hole in the cover to receive a detection stylet. Means are provided for detecting the movements of the stylet support w.r.t. the seat. These are on electrical contact having a first element mounted on the stylet support and a second element mounted opposite it. The first element is a screw whose point is in contact with the second element when the stylet is at rest. It is mounted on the stylet support coaxially with an axis perpendicular to the plane containing the circular edge and passing through its centre.
Patent FR-2534630-A1 (FR)
Title: Air filter for internal combustion engine
Inventor: STAROBINSKY RUDOLF NATANOVICH
IPC: F02M35/14
Filed: 1982-10-18
Abstract: The air filter comprises a cylindrical body 1 provided with an intake aperture receiving an air inlet manifold 3 whilst the base 1 is provided with an exhaust aperture 5. A filter element 6 is located inside the body 1 coaxial with the latter. According to the invention the centres of the intake aperture and of the exhaust aperture 5 are arranged in planes perpendicular to one another and traversing the axis of the body 1, whilst the centre of the exhaust aperture 5 is offset in relation to the axis of the body 1 by a distance of 0.58 to 0.68 R, where R is the radius of the base of the cylinder of the body 1. The invention has applications, preferably, in the intake systems of all the carburettor engines used in various transport machines for reducing the noise emitted to the surrounding environment.
Patent FR-2519872-A1 (FR)
Title: Winemaking filter chamber contg. multiple vertical flow panels - rigidly coupled to vibrate together for detachment of filter cake
Inventor: VELO ANTONIO
IPC: B01D37/02
Filed: 1983-01-20
Abstract: An industrial wine-making filter of the type comprising a chamber contg. a number of vertical filter panels. All the panels are fixed to the top of a common, tubular manifold into which filtrate is discharged from the cavity of each filter panel. The manifold is controllably vibrated to shake the panels and thus detach filter cake. The panels are connected together by their top edges being fixed to a rigid connectors. Buffers are provided to limit the amplitude of panel vibration on both sides of its median position. The buffers are pref. fixed to the inside of the chamber. The connectors pref. comprise a pair of parallel bars symmetrically fixed at right angles to the planes of the panels. The top edge of each panel has vertical studs rigidly fixed into the bars. The filter is intended for use in the wine-making industry.
Patent FR-2520475-A1 (FR)
Title: Disque de rupture se deformant sur la face envers et procede de fabrication
Inventor: FINNEGAN MICHAEL C
IPC: F16K17/16
Filed: 1983-01-20
Abstract: DISPOSITIF DE SECURITE A DISQUE DE RUPTURE SUSCEPTIBLE DE SE ROMPRE SOUS L'EFFET DE LA PRESSION. LE DISQUE DE RUPTURE SUSCEPTIBLE DE SE DEFORMER SUR LA FACE OPPOSEE 22 PRESENTE UNE PORTION CONCAVE-CONVEXE 24 RELIEE A UNE PORTION ANNULAIRE 26 EN FORME DE COLLERETTE PAR L'INTERMEDIAIRE D'UNE SECTION DE TRANSITION 28, ET UN ELEMENT SUPPORT 32 PLACE SUR LE COTE CONCAVE DE LA PORTION ANNULAIRE 26 ET EST DESTINE A ETRE BRIDE ENTRE LES COLLERETTES 12 ET 14 D'AMENEE ET DE SORTIE. IL COMPORTE UN ANNEAU SUPPORT 30 SOUDE A LADITE COLLERETTE ANNULAIRE 26 SUR LE COTE CONVEXE DE CELLE-CI, CET ANNEAU 30 ETANT SOUDE A L'ELEMENT SUPPORT 32. APPLICATIONS : PROTECTION DES INSTALLATIONS CONTENANT DES FLUIDES SOUS PRESSION.
Patent FR-2545704-A1 (FR)
Title: Creole-type earring
Inventor: LEGROS ANDRE
IPC: A44C7/00
Filed: 1983-05-10
Abstract: This earring consists, in combination: - of a tubular annular body 1 cut out along one sector and milled on a portion of its perimeter, from one end of this sector; - and of a metal wire 2 forming a ring which, having a diameter equal to the mean diameter of the body, is cut out along a sector substantially equal to that cut out in this body, is mounted slidably in this body and comprises, at one of its ends, a finger 4 which is directed outwards, passes through the milled zone in the body and projects outside.
Patent FR-2527613-A1 (FR)
Title: Endotoxine raffinee debarrassee de sa toxicite
Inventor: RIBI EDGAR ERNST
IPC: A61K35/74
Filed: 1983-05-25
Abstract: LA PRESENTE INVENTION A POUR OBJET UN PROCEDE DE PREPARATION D'ENDOTOXINE RAFFINEE DEBARRASSEE DE SA TOXICITE NE CONTENANT PAS DE 2-CETO-3-DESOXYOCTANOATE DETECTABLE. ELLE SE RAPPORTE A UNE ENDOTOXINE RAFFINEE DEBARRASSEE DE SA TOXICITE NE CONTENANT PAS DE 2-CETO-3-DESOXYOCTANOATE DETECTABLE, CONTENANT ENTRE 350 ET 474 NMOLESMG DE PHOSPHORE ET ENTRE ENVIRON 1.700 ET 2.000 NMOLESMG D'ACIDES GRAS.
Patent FR-2547230-A1 (FR)
Title: Automatic tool-changing device, especially for machine tools
IPC: B23Q3/157
Filed: 1983-06-09
Abstract: The device essentially comprises a rotary magazine for positioning tools, and a handling unit equipped with at least one tool-holding arm with a gripper, the said handler being securely fastened to a member for rotationally controlling a drum which peripherally has at least two grooves of suitable profile and in combination with the mechanical assembly, allowing the linear displacement in both directions (advance and retraction) of the gripper P of the tool-holding arm C, the other cam 10b via another suitable profile allowing, in combination with the two separate mechanical assemblies, on the one hand, the tool-holding arm C to be raised and lowered and, on the other hand, the said arm C to be rotated in a horizontal plane, these two movements being separate. The member for rotationally controlling the drum and the member for controlling the magazine being securely fastened to an automatic position-control device. The device is used in particular to be fitted to all machine tools with a horizontal or vertical spindle.
Patent FR-2549967-A1 (FR)
Title: Device for the identification of secondary radar codes
Inventor: LOISON JEAN-YVES
IPC: G01S13/78
Filed: 1983-07-29
Abstract: The device identifies secondary radar codes by comparison with predetermined codes. It consists of a read-write memory 1 into which is entered, during an initialisation stage, a first or second numerical value according to whether the entered address does or does not coincide with one of the predetermined numerically coded codes. During an identification stage, the read-write memory is accessed with read addresses corresponding to the secondary numerically coded radar codes to be identified. The identity of the code to be identified with one of the predetermined codes is then indicated by the numerical value obtained at the output of the memory 1. Application to secondary radars.
Patent FR-2532696-A1 (FR)
Title: Screw head retainer member
Inventor: CALDERA FULVIO
IPC: F16B37/14
Filed: 1983-08-23
Abstract: The screw head is retained by the profiled part of the retainer, with a facetted cut-out to grip the screw head. The other end of the retainer has a ratchet clip (6) which clips into a securing slit in the mounting. The plastics moulded retainer provides a simple, low cost security for the screw and is used to protect e.g. oil filler screws for hydraulic systems. It is fitted and removed without any special tools.
Patent FR-2535569-A1 (FR)
Title: Montage de commutation de l'alimentation en puissance de recepteurs electriques
Inventor: MEISNER ALFRED
IPC: H01H19/56
Filed: 1983-11-02
Abstract: IL COMPREND UN COMMUTATEUR ROTATIF DE CODAGE 1 PRESENTANT UNE POSITION DE COMMUTATION SUPPLEMENTAIRE DANS LAQUELLE UN CONTACT DE COMMUTATION SUPPLEMENTAIRE 13 EST RELIE A UNE TENSION U. IL COMPORTE EN OUTRE UN MONTAGE DECODEUR DE REGLAGE DE PUISSANCE 15 ATTAQUE PAR LE COMMUTATEUR DE CODAGE 1 QUI ATTAQUE PAR UNE SORTIE D'HORLOGE 16 UN COMMUTATEUR COMMANDE 17 QUI PEUT RELIER DE NOUVEAU UN RECEPTEUR ELECTRIQUE 21 A UNE TENSION D'ALIMENTATION, DE PREFERENCE LA TENSION DU SECTEUR. EN OUTRE, LE COMMUTATEUR COMMANDE 17 EST RELIE PAR UNE LIGNE DE COMMANDE DIRECTE 22 AU CONTACT DE COMMUTATION SUPPLEMENTAIRE 13 ET IL PEUT AINSI, DANS LA POSITION DE COMMUTATION SUPPLEMENTAIRE, ETRE BRANCHE DIRECTEMENT, EN EVITANT LE MONTAGE DU DECODEUR DE REGLAGE DE PUISSANCE 15. APPLICATIONS : NOTAMMENT AUX CUISINIERES ELECTRIQUES.
Patent FR-2537984-A1 (FR)
Title: Electroconductive carbon black useful in plastics and rubber
Inventor: NAKAZONO JUNICHI
IPC: C08L77/00
Filed: 1983-11-03
Abstract: C black (I) with improved electroconductivity is obtd. by heat treatment of a mixt. of C black (II) and a polymeric and/or bituminous substance (III), which can be carbonised at temp. of min. 1000 deg.C. (I) has a pH of not less than 9, specific surface area of 40-70 m2/g and I2 adsorption of 50-80 mg/g and pref. a given X-ray diffraction pattern. (I) is useful for rendering plastics and rubbers electroconductive. The electroconductive compsns. are useful as antistatic sheets, material for discharging static electricity, antennae, electromagnetic radiation screens, coaxial cables, films, planar heat generators, magnetic recording material, electroconductive mouldings, video tapes, electroconductive paint and coatings. (I) can be used in smaller amts. than usual for a given conductivity, does not impair the properties of the material and can improve the physical properties.
Patent FR-2556406-A1 (FR)
Title: Procede pour actionner un outil dans un puits a une profondeur determinee et outil permettant la mise en oeuvre du procede
Inventor: BOISSON GERARD
IPC: E21B23/01
Filed: 1983-12-08
Abstract: L'OUTIL COMPORTE UNE TIGE 110 SUR LAQUELLE COULISSE UNE PIECE ANNULAIRE 120 SUPPORTANT DES MACHOIRES 124 ET 124A. LA PIECE 120 EST IMMOBILISEE PAR RAPPORT A LA TIGE A L'AIDE D'UNE GOUPILLE FUSIBLE 140 DANS UNE POSITION QUI BANDE UN RESSORT 130. UN CHOIX CONVENABLE DU MATERIAU FUSIBLE PERMET LA FUSION DE LA GOUPILLE 140 A UNE PROFONDEUR CHOISIE, LIBERANT AINSI L'ENERGIE DE RESSORT 130 QUI SOLLICITE LES MACHOIRES 124 ET 124A. CELLES-CI REMONTENT SUR UN CONE D'EXPANSION 111, REALISANT AINSI L'ANCRAGE DE L'OUTIL EN PROFONDEUR.
Patent FR-2557605-A1 (FR)
Inventor: DUBREUX BERNARD
IPC: D21C9/16
Filed: 1983-12-29
Abstract: 1. Process for bleaching chemical paper pulps using hydrogen peroxide, characterized in that the operation is carried out in a single stage at a pH of 11 to 11.5, at a temperature of 70 degrees C to 100 degrees C, with the aid of a solution containing, in addition to hydrogen peroxide, at least one alkaline agent chosen from sodium hydroxide and sodium carbonate, at least one alkali metal silicate at a concentration of at least 0.3% by weight, expressed as SiO2 , at least one magnesium salt and at least one calcium salt in such quantity that the weight concentration of each of these alkaline-earth elements is between 0.05% and 1%, these elements being maintained in the dissolved state with the aid of at least one complexing agent for alkaline-earth ions in such quantity that the total concentration of complexant does not exceed 10% by weight.
Patent FR-2558151-A1 (FR)
Title: Alkali-free borosilicate glass containing lead, and composition for abrasive tools containing this glass as vitreous binder
Inventor: LYSANOV VLADISLAV SERGEEVICH
IPC: C03C3/108
Filed: 1984-01-17
Abstract: Manufacture of abrasive materials. The borosilicate glass forming the subject of the invention is of the type containing SiO2, B2O3, Al2O3, CaO, BaO, ZnO, PbO, MgO and TiO2 and is characterised in that it additionally contains MnO and P2O5. The glass in question contains (mass%):     SiO2, 36.0 to 42.0;   B2O3, 9.0 to 11.5;   Al2O3, 13.0 to 14.0;   PbO, 24.5 to 30.0;   ZnO, 3.0 to 5.0;   MgO, 1.5 to 2.5;   CaO, 0.5 to 4.0;   BaO, 0.1 to 2.0;   TiO2, 0.1 to 0.5;   P2O5, 0.1 to 1.0;   MnO, 0.1 to 2.0.   The invention can be employed in various branches of mechanical constructions.
Patent FR-2559059-A1 (FR)
Title: Composition of a material for dental application and process for producing a dental appliance from this composition
IPC: A61K6/06
Filed: 1984-02-07
Abstract: The invention relates to a composition of material for the production of orthodontic appliances and/or for dental application, as well as to the composition and to the process for obtaining such appliances. The aforementioned composition is zirconium oxide partially stabilised with yttrium, with magnesium oxide or with lime. One of the possible and non-limiting applications is described in the attached figure. The application consists of a ceramic attachment, made in a single part and composed of a base 1 designed to come into contact with the surface of the tooth. It contains a longitudinal channel 2 which is intended for passage of the arch 3 held in place via fixing tabs 4 by means of a ligature 5.
Patent FR-2543708-A1 (FR)
Title: Procede et appareil de recherche d'images, utilisant des annotations en tant qu'informations-guides
Inventor: TABATA KUNIAKI
IPC: G09G5/377
Filed: 1984-03-30
Abstract: L'INVENTION CONCERNE UN PROCEDE ET UN APPAREIL DE RECHERCHE D'IMAGES, UTILISANT DES ANNOTATIONS EN TANT QU'INFORMATIONS-GUIDES. CET APPAREIL COMPORTE DES MOYENS DE MEMORISATION D'IMAGES 160, DES MOYENS 110, 130 SPECIFIANT LA CONFIGURATION ET LA POSITION D'UNE IMAGE PARTIELLE, DES MOYENS 110, 180 POUR DECOUPER UNE IMAGE PARTIELLE ET DES MOYENS 170 POUR MEMORISER UN GROUPE DE DONNEES DE REFERENCE ASSOCIEES A DIFFERENTES IMAGES, ET DES MOYENS 110, 180 POUR REUNIR LADITE IMAGE PARTIELLE DECOUPEE A DES DONNEES DE REFERENCE, QUI LUI CORRESPONDENT. APPLICATION NOTAMMENT A LA RECUPERATION ET A L'AFFICHAGE D'IMAGES DANS DES FICHIERS D'IMAGES UTILISANT DES INDICATIONS DE GUIDAGE ASSOCIEES.
Patent FR-2545290-A1 (FR)
Title: Dispositif de ligne de contact
Inventor: PFANNKUCHE HEINZ
IPC: B60M1/30
Filed: 1984-04-09
Abstract: A.DISPOSITIF DE LIGNE DE CONTACT. B.DISPOSITIF CARACTERISE EN CE QUE LES LIGNES DE CONTACT 2 SONT RELIEES ENTRE ELLES AUX EXTREMITES DES TRONCONS PAR L'INTERMEDIAIRE D'UNE PIECE ISOLANTE COMMUNE 3 QUI EST FIXEE SUR LE RAIL 1 AU MOYEN D'UNE LIAISON PAR ENCLIQUETAGE AGISSANT TRANSVERSALEMENT PAR RAPPORT A LA DIRECTION LONGITUDINALE DU RAIL. C.L'INVENTION S'APPLIQUE AUX DISPOSITIFS DE LIGNE DE CONTACT.
Patent FR-2565078-A1 (FR)
Title: Easy-fit shoe, adaptable to the morphology of the foot
Inventor: REVELLO JOSEPH
IPC: A43B3/26
Filed: 1984-05-30
Abstract: Shoe comprising a sole 1 made from latex or another material with a high degree of elastic stretch, comprising at least one upward extension 2, 3, 4, 5, 6, 7 to which is fastened the upper 8 which is made from leather, textile or another relatively non-stretch material, in such a manner that the said extension, by means of its elastic stretchability, facilitates fitting and permits the adaptation of the shoe to different widths and morphologies of the feet.