baber/WOPTO huggingface dataset:
Patent FR-2656305-B1 (FR)
Inventor: RAYMOND HESS
IPC: C07D301/32
Filed: 1989-12-22
Granted: 1992-04-10
Abstract: This process for the purification by distillation of glycidyl (meth)acrylate containing light impurities and heavy impurities, is characterised in that: in a first stage, a distillation of the glycidyl (meth)acrylate to be purified is carried out in the presence of a first solvent capable of forming a low boiling point heteroazeotrope with the light impurities and epichlorohydrin, so as to obtain a tops (head fraction) which consists of a solvent/light product heteroazeotrope; and in a second stage, the glycidyl (meth)acrylate thus freed of the light products is subjected to a distillation in the presence of a second solvent capable of forming a low boiling point heteroazeotrope with glycidyl (meth)acrylate, so as to obtain a tops (head fraction) consisting of the desired pure glycidyl (meth)acrylate, thus freed of heavy impurities, the said solvents being, during these two distillations, present throughout the distillation region, including the distillation vessel.
Patent FR-2662921-B1 (FR)
Inventor: JEAN-LOUIS GUERET
IPC: A45D40/00
Filed: 1990-06-07
Granted: 1992-09-04
Abstract: The device comprises, on the one hand, a grape-shaped pellet of the said pasty product, having a longitudinal axis (W-W) and with a base (366) and a lateral face (367) and, on the other hand, a movable cup (301) for carrying the grape-shaped pellet, the cup having an inner lateral face (310) limited by a bottom (306). In order to produce the device, the procedure comprises the following stages: a) the cup (301) is arranged so that its inner lateral face (310) has, in section through a plane orthogonal to the said axis (W-W), a closed contour, b) the base (366) of the grape-shaped pellet is inserted in the cup (301), having created a leak, c) the air leak is then eliminated in order to produce leaktight trapping of the base (366) in the cup (301). <??>The device produced comprises a cup (301) whose bottom (406) is airtight.
Patent FR-2664438-B1 (FR)
Inventor: RENE OZOUF
IPC: H04M1/02
Filed: 1990-07-04
Granted: 1994-07-22
Abstract: In the device according to the invention, the electrical connection (4) being contained within the hinge, the first (1) of these elements, composed of two half-shells (11, 12), comprises two projections (101, 121), the opposite faces of which are provided with a cylindrical cavity (102, 122) half-contained within each of the half-shells, and the second (2) of these elements comprises a protuberance (201), two ends (202, 203) of which are cylindrical, the projections and the protuberance being provided in order to fit into each other so as to form the hinge and comprising openings provided for the passage of the electrical connection.
Patent FR-2671416-B1 (FR)
Inventor: JEAN-NOEL AUDOUX
IPC: G06K19/077
Filed: 1991-01-04
Granted: 1993-04-23
Abstract: The method according to the text of the application consists in providing the body (1) of the card with a cavity (2) and with a conduction area (5) situated partly in the cavity (2) and partly outside it; in inserting an fixing the integrated circuit (3) in the cavity (2) in such a way that its solder pads (4, 4a) are turned outwards; in forming by deposition a first layer of dielectric varnish (6) on the integrated circuit (3), with the exception of the solder pads (4, 4a) of the latter, and on part of the body (1) which surrounds the cavity (2), with the exception of an area (7) situated immediately in line with the conduction area (5); in forming read/write contacts (9, 9a) as well as the conductors (8) linking these latter to the respective solder pads (4, 4a) of the integrated circuit (3) by deposition of a conducting ink on the said solder pads (4, 4a), on the first layer of varnish (6), and on the part which is not coated with varnish of the conduction area (5) so that it is linked to one of the conductors; and in forming by deposition a second layer of dielectric varnish (10) on the parts of the ink deposit which do not constitute the read/write contacts (9, 9a).
Patent FR-2671511-B1 (FR)
Inventor: PREVOTAT BERNARD
IPC: B29C48/11
Filed: 1991-01-10
Granted: 1994-08-26
Abstract: The invention relates to a cavitied profiled structure made from thermoplastic resin, the cavities of which are disposed substantially perpendicularly to the axis of the structure. The structure is produced by means of an extrusion apparatus consisting of an extrusion head (1) and of an extrusion tool (2), the extrusion head being divided into three substantially superposed channels (3)(4)(5) which emerge substantially into the region of the three corresponding channels of the extrusion tool and, on the opposite side, are connected to the feed channel of at least one extruder, the two outer channels (3)(5) serving for the passage of the material constituting the external walls of the structure or of the tube and the intermediate channel (4) serving for the passage of the material for the manufacture of the walls of the cavities, the said apparatus being characterised in that each of the outer channels is separated from the intermediate channel by means of an additional channel (7)(8), ending up, at the output, in alignment with those of the other channels, and the input of which, outside the apparatus, is intended to be connected to a means for varying the pressure. The structure is obtained by creating an alternating pressure variation in the additional channels (7)(8).
Patent FR-2692281-B1 (FR)
Inventor: ANDRE BORIES
IPC: C12P7/18
Filed: 1992-06-15
Granted: 1995-07-21
Abstract: Process for the production of products having bacterial activity and capable of converting glycerol into 1,3-propanediol. The invention consists in firstly producing bacterial strains or species which ferment glycerol from anaerobic microbial habitats present in nature and enriching by discontinuous fermentation said precultures. The products having bacterial activity are then isolated used to convert glycerol by fermentation into 1,3-propanediol. The invention is characterized in that the conversion results in high yield and in that the biosynthesis of 1,3-propanediol prevents the formation of a large number of by-products.
Patent FR-2694016-B1 (FR)
Inventor: DELCROIX YVES
IPC: C11D1/62
Filed: 1992-07-22
Granted: 1994-09-30
Abstract: PCT No. PCT/FR93/00746 Sec. 371 Date Jan. 23, 1995 Sec. 102(e) Date Jan. 23, 1995 PCT Filed Jul. 21, 1993 PCT Pub. No. WO94/02583 PCT Pub. Date Feb. 3, 1994A substantially liquid, aqueous, rare earth oxide based composition for preserving the luster of the smooth surfaces of objects needing to have such an appearance. The composition is characterized in that the rare earth oxide in the composition consists of particles with an average diameter of less than two micrometers (2  mu m), and in that aqueous solvent includes a polysiloxane oil and a degreasing agent for diluting the polysiloxane oil.
Patent FR-2705583-B1 (FR)
Inventor: BERNARD CAPON
IPC: B01D35/00
Filed: 1993-05-28
Granted: 1995-08-18
Abstract: Filtering device for the clarification of liquids, especially of industrial or effluent water, of the type comprising an open tank provided with a floor with nozzles supporting the filter bed, side chutes for the delivery of the raw water, a gutter for discharging filtered water, means for lifting the material from the filter and an axial gutter for discharging the washing water, this device being characterised in that the bottom of the filter, under the floor (12) is separated along its lengthwise axis by a leakproof partition (20) bounding two independent cells (14, 15 - 14' - 15') in the filter.
Patent FR-2708947-B1 (FR)
Inventor: STENNE ROLAND
IPC: E02D27/28
Filed: 1993-08-09
Granted: 1995-11-03
Abstract: The device includes a tube (5) designed to be placed in the foundations around the said upper part of the reinforcement and to be sealed into the foundation, means (8-14) for temporarily exerting compression on the reinforcement (1) inside the tube (5) and means (15, 17) for introducing into the tube, around the compressed reinforcement, a slurry for sealing the micro-pile into the tube. The invention applies particularly to the micro-pile used by way of an element for underpinning existing buildings and constructions.
Patent FR-2711866-B1 (FR)
Inventor: MESSIET SAMIRA
IPC: H04W88/02
Filed: 1993-10-26
Granted: 1996-05-24
Abstract: PCT No. PCT/FR94/01242 Sec. 371 Date Apr. 24, 1996 Sec. 102(e) Date Apr. 24, 1996 PCT Filed Oct. 25, 1994 PCT Pub. No. WO95/12293 PCT Pub. Date May 4, 1995A digital radiotelephone installation with mobile terminals includes a fixed base transceiver station, which is an element of the network, and mobile telephone terminals at least some of which are designed to be unable to access the network until a user has inserted therein an extractable personalized smart card ("SIM card"). Each mobile terminal is designed to receive, in addition to the extractable "conventional" SIM card, another, auxiliary SIM smart card which remains in the mobile terminal at all times. The auxiliary SIM card corresponds to the same personalized subscription as the conventional SIM card. The extractable conventional SIM card takes precedence over the auxiliary SIM card when it is inserted into said mobile terminal, however, and has the same functionality as the latter. The auxiliary SIM card is assigned by the network or by said terminal only specific predefined services, such as typically an answering function and/or a short messages service function, the predefined services possibly including outgoing call restriction.
Patent FR-2731003-B1 (FR)
Inventor: ARSAC JEAN FRANCOIS
IPC: C08L53/02
Filed: 1995-02-27
Granted: 1997-04-04
Abstract: A compsn. contains: (A) a compsn. contg. a vinylaromatic polymer, (B) a polyolefin, (C) a linear copolymer contg. a vinyl-aromatic monomer and a conjugated diene with more than 50% of units from the vinylaromatic monomer, and (D) a linear copolymer contg. a vinylaromatic monomer and a conjugated diene, with more than 50% of units from the diene.
Patent FR-2759280-B1 (FR)
Inventor: BENARROUCH JACQUES
IPC: A47L17/08
Filed: 1997-02-12
Granted: 1999-04-30
Abstract: PCT No. PCT/FR98/00204 Sec. 371 Date Jan. 19, 1999 Sec. 102(e) Date Jan. 19, 1999 PCT Filed Feb. 5, 1998 PCT Pub. No. WO98/35605 PCT Pub. Date Aug. 20, 1998A scouring device for manual use has a support formed by folding two longitudinal parts about an axis of symmetry to provide a pad support having a handle which support mounts a pad for cleaning.
Patent FR-2754494-B1 (FR)
Inventor: KUPPER KLAUS
IPC: F16D48/06
Filed: 1997-10-08
Granted: 2001-05-04
Abstract: In a motor vehicle with a manually-controlled gearbox (4) and an automatically-operated clutch (3) which is disengaged when a sensor device (14) detects a manual activation of the gear shift lever (13), the clutch is not disengaged unless the engine torque is less than a boundary value in order to avoid engine flare. The boundary value is a variable dependent on the rate of release of the accelerator pedal, to allow for a delay in the reduction of torque when the accelerator depression is reduced. The torque is calculated from the accelerator or throttle position as well as other parameters.
Patent FR-2786194-B1 (FR)
Inventor: ROUSSEL MARCEL
IPC: C08J9/00
Filed: 1998-11-24
Granted: 2001-02-09
Abstract: Method for preparing cellular expanded rubber material from expandable rubber mixture is claimed in which said mixture is subjected to at least operations of wringing, crosslinking and expansion; crosslinking and expansion taking place simultaneously and continuously in a horizontal plane. Method for preparing cellular expanded rubber material from expandable rubber mixture is claimed in which said mixture is subjected to at least operations of wringing, crosslinking and expansion; crosslinking and expansion taking place simultaneously and continuously in a horizontal plane; said mixture has Mooney index = 40-80 at 50 degrees C; and said mixture comprises, in addition to rubber, at least a crosslinking system and at least an expansion system both of which are active at the same temperature between 150 and 210 degrees C.
Patent FR-2788276-B1 (FR)
Inventor: CROCQ VERONIQUE
IPC: C07K5/078
Filed: 1999-01-12
Granted: 2001-02-16
Abstract: A method for preparing compounds of formula (I)wherein R is selected from the group consisting of H. alkyl, aryl, and aralkyl of up to 18 carbon atoms and the amine function may be free or protected from a compound of formula (IA) wherein cyclization is carried out in a basic medium and in the presence of a phosphonic acid derivative and the use of said method as an intermediate step for preparing a compound inhibiting the interleukin-1 beta conversion enzyme.
Patent FR-2789685-B1 (FR)
Inventor: WELTROWSKI MAREK
IPC: C08B37/16
Filed: 1999-02-15
Granted: 2001-05-04
Abstract: The present invention concerns a process for preparing copolymers of cyclodextrin(s) and/or cyclodextrin derivative(s), characterized by the following operations: (a) preparing a solid state mixture of cyclodextrin(s) and/or cyclodextrin derivative(s) and/or inclusion complex(es) of cyclodextrin(s) and/or cyclodextrin derivative(s) and a poly(carboxylic) acid and/or a poly(carboxylic) acid anhydride or a mixture of poly(carboxylic) acid(s) and/or poly(carboxylic) acid anhydride(s), and optionally, a catalyst; and (b) heating the solid mixture to a temperature in the range 100° C. to 200° C. for a period in the range 1 min to 60 min, preferably 30 min or substantially 30 min. The present invention also concerns soluble and insoluble compounds of cyclodextrin(s) and/or cyclodextrin derivative(s) or their inclusion complexes with at least one poly(carboxylic) acid.
Patent FR-2794854-B1 (FR)
Inventor: BRUN ISABELLE
IPC: F42B5/24
Filed: 1999-06-08
Granted: 2002-05-17
Abstract: The metallic cartridge case for firearms has an interior coating of anti-erosion sleeve, made of combustible matrix of fibrous nitrocellulose and cellulose and organic resin, filled with titanium dioxide. The metallic cartridge case is at least partially internally coated with an anti-erosion coating comprising powdered titanium oxide. The coating is in form of solid rigid sleeve comprising combustible matrix filled with titanium oxide. The content of the latter is 10-30 wt.% per total weight of sleeve and combustible matrix comprises fibrous nitrocellulose, fibrous cellulose and organic resin. Independent claims are also included for the following: (i) a munition for firearms comprising metallic cartridge case provided with percussion cap and projectile, and containing propulsive combustible charge, where the cartridge case is as above; and (ii) an anti-erosion device aimed to provide interior coating of metallic cartridge case for firearms and having form of rigid sleeve consisting of combustible matrix filled with titanium oxide, as above.
Patent FR-2798931-B1 (FR)
Inventor: BONAVENTURE NICOLE
IPC: C09B5/00
Filed: 1999-09-22
Granted: 2001-11-16
Abstract: Indolyl-substituted triindolo-cycloheptatriene compounds (I) are new.   Triindolo-cycloheptatriene derivatives of formula (I) are new. X = O or NH; R1, R2 = H, 1-4C alkyl, 1-4C monohydroxyalkyl, 1-4C polyhydroxyalkyl, (1-4C) alkylcarbonyl, 1-4C aminoalkyl, 1-4C polyaminoalkyl or 1-4C aminohydroxyalkyl; R3-R5 = H or linear or branched, saturated or unsaturated 1-4C hydrocarbyl. An Independent claim is included for preparation of (I).
Patent HU-229508-B1 (HU)
Title: Vitamin d precursors, process for their preparation and their intermediates
Inventor: PASCAL JEAN-CLAUDE
IPC: C07C/
Filed: 2000-12-04
Abstract: The invention relates to precursors of the A-ring of vitamin D, of the formula (I) :
         in which A, R, R 1  and R 2  are as defined in the specification. 
     The invention also relates to a method of preparing compounds (I) comprising the enzymatic asymmetrisation of 3,5-dihydroxybenzoic acid derivatives, as well as intermediates of preparation of said compounds.
Patent HU-230451-B1 (HU)
Inventor: VARGHA ZSOLT
IPC: B62M11/04
Filed: 2012-12-21
Abstract: Egyszemélyes közlekedési eszköz, melynek deszkára (0) szerelt kerekei (6) vannak, egy pedálja (1) a meghajtáshoz,
azzal jellemezve, hogy a meghajtó egysége fordulatszámváltóval van felszerelve. Kiss súlya és terjedelme komoly előnyt
jelent a hagyományos eszközökkel, pl: kerékpárral szemben.
Patent HU-220565-B1 (HU)
Inventor: KRANAUER TAMAS
IPC: A63F9/00
Filed: 1999-06-28
Abstract: A találmány tárgya játékszer a logikai készség és a térérzékelésfejlesztésére, amely két, egymáshoz képest egy labirintuspálya menténelmozdítható játékidomból áll. A találmány lényege az, hogy az egyikjátékidom egy határoló elemek közé befogott üreges befogadótestként(1, 21, 31), míg a másik játékidom a befogadótest (1, 21, 31) üregébentengelyirányban megvezetett, abból változtatható mértékben kinyúló ésa hossztengelye körül elforgatható csúszótestként (2, 22, 32) vankialakítva, ahol a befogadótest (1, 21, 31) csúszótestet (2, 22, 32)körülvevő belső felülete és a csúszótest (2, 22, 32) ezzel szemköztikülső felülete közül az egyiken egy kívülről nézve rejtettlabirintuspálya van kiképezve, míg a másik egy ezen labirintuspályagátelemei között ívesen és tengelyirányban eltolható ütközőelemmel (9,29) van ellátva. ŕ
Patent JP-2919448-B1 (JP)
Title: 浄水装置及び浄水設備
IPC: C02F3/06
Filed: 1998-01-27
Granted: 1999-07-12
Abstract: 【要約】
【課題】設置面積が小さく構造が簡単で浄化性能に優れ た浄水装置を提供する。
【解決手段】地中に埋設される浄水装置１は円筒形の第 １・第２貯留槽2,6 を有する。第１貯留槽２内の第２貯 留槽６は底部が開口している。貯留槽2,6 の内部には、 汚濁水中の浮遊固形物が付着する接触材10が設けられ る。貯留槽2,6 の中心には吸引管12がある。貯留槽2,6  間のリング状の横断面積A 1 が、第２の貯留槽６の円形の 横断面積A 2 とほぼ等しい。導入管８で貯留槽２の上部に 導入された汚濁水は回転しながら下降する。貯留槽２の 底部４に達した汚濁水は、底部の開口から貯留槽６内に 入り、同方向に回転しながら貯留槽６内を上昇し、排出 管９から排出される。貯留槽2,6 内で汚濁水は一定の流 速で流れる。接触材10は水と均一に接触し、水中の浮遊 固形物を効率的に付着する。剥離して貯留槽２の底部４ に堆積した固形物は、吸引管１２を通して貯留槽２の外 に効率的に吸い出せる。
Patent JP-2938003-B1 (JP)
Title: 湿式画像形成装置
IPC: G03G21/10
Filed: 1998-03-23
Granted: 1999-08-23
Abstract: 【要約】
【課題】  現像されたベルト状感光体から残留現像液を 除去する第１の絞りローラから現像液が流れ出してセン サ窓や感光体を汚すのを防止することができる湿式画像 形成装置を提供する。
【解決手段】  第１の絞りローラ４の次段に設けられた 一対の第２の絞りローラ５の両端部に溝２１を設けて、 デベローラ１で用いた現像液Ｔ１の残りを第１の絞りロ ーラ４で除去する際に、押し出されようとする現像液Ｔ ３を溝２１に溜めることにより第１の絞りローラから現 像液が流れ出してセンサ窓や感光体を汚すという不具合 を防止することができる。
Patent NL-1041921-B1 (NL)
Title: Klem-Dakhaak
Inventor: ANTHONIE BERNARDUS BERLEE
IPC: E04G21/32
Filed: 2016-06-08
Granted: 2018-03-09
Abstract: De Klem-Dakhaak kenmerkt zich doordat deze vanaf de buitenkant aan een met leien gedekt dak kan worden bevestigd, waarbij slechts een beperkte opening in het dakbeschot hoeft te worden aangebracht. De beperkte opening is groot genoeg om een hand door de opening te kunnen steken. De klemdelen worden door de opening heen aan de achterzijde van het dakbeschot samengesteld tot een stijf kruis, waarbij door een voorgevormd passend vulstuk te plaatsen in de opening in het dakbeschot de afschuifweerstand van de dakhaak aanzienlijk wordt vergroot, waarna de dakhaak wordt bevestigd en zorgt voor de klemmende werking. Daarbij kan de klemkracht nog verder versterkt worden, door op het dakbeschot een (metalen of bijvoorbeeld kunststof) voorbewerkte dunne plaat aan te brengen, groot genoeg om met vier voorgeboorde gaten met de vier bouten aan de buitenkant op het dakbeschot aan te brengen.
Patent NL-1042569-B1 (NL)
Title: Inrichting voor het monitoren van verzakking van ondergrondse leidingen en kabels
Inventor: SIMON HARTENSVELD
IPC: G01C5/00
Filed: 2017-10-05
Granted: 2019-04-15
Abstract: De onderhavige uitvinding heeft betrekking op een inrichting voor het monitoren van eventuele verzakkingen van ondergrondse leidingen en kabels. De inrichting volgens de uitvinding betreft een zakbaak, zijnde een meetpaal welke veranderingen in de positie van een ondergrondse pijpleiding of kabel in verticale richting meetbaar maakt zonder voor de meting graafwerkzaamheden te hoeven verrichten. De inrichting volgens de uitvinding onderscheidt zich van zakbaken volgens de stand van de techniek door het kenmerk dat voor het aan een leiding of kabel bevestigen van de inrichting volgens de uitvinding geen of minder omvangrijke graafwerkzaamheden vereist zijn dan voor het aanbrengen van een zakbaak volgens de stand van de techniek.
Patent NL-2013429-B1 (NL)
Title: A lure.
Inventor: TONY SLOOF
IPC: A01K85/16
Filed: 2014-09-05
Granted: 2016-09-27
Abstract: A lure comprising a body with a head section and a tail section. The body comprises a lip extending forwardly and downwardly from the head section. The head section comprises an organ for attaching a fishing line. To provide improved control over the lure while fishing, the lip is adjustably connected to the body of the lure in an orientation chosen from a multitude of orientations. With the lure according to the invention, the fisherman can select the depth of the lure for a given speed with which the lure is moved through the water.
Patent NL-2015019-B1 (NL)
Title: Gripping device for egg package.
Inventor: EDWIN LAMBERTUS MARIA PAPEN
IPC: B65G59/10
Filed: 2015-06-24
Granted: 2017-01-24
Abstract: A gripping device for gripping a package having a dimpled structure, wherein each dimple is adapted to receive a product such as an egg or fruit and isolate it from other same products placed in the package. The gripping device includes a gripping unit that is movable up and down to engage and grip the package. The gripping unit comprising at least two gripping members operating in a mutual opposite direction and each movable in a substantially transverse direction from an advanced position to a retracted position and vice versa to so as to grip and to release each a dimple of the tray or carton. Each of the gripping members is operatively connected to a separate actuator to move the gripping members to and from the advanced position and retracted position.
Patent NL-2018180-B1 (NL)
Title: Stapel dakbedekkingsplaten
Inventor: TEUNIS WILLEM VAN MIDDENDORP
IPC: E04G21/16
Filed: 2017-01-16
Granted: 2017-08-22
Abstract: De uitvinding heeft betrekking op een stapel dakbedekkingsplaten, zoals golfplaten, waarbij de dakbedekkingsplaten zich in langsrichting van de stapel op afstand van elkaar worden gehouden met behulp van afstandhouders. De afstandhouders kunnen zich bijvoorbeeld aan twee eerste tegenovergelegen zijden van de stapel uitstrekken. De stapel kan op een pallet zijn aangebracht.
Patent NL-2018578-B1 (NL)
Title: drinkfles
Inventor: MONS BROEKSTEEG
IPC: B65D23/00
Filed: 2017-03-24
Granted: 2018-10-03
Abstract: De onderhavige uitvinding heeft betrekking op een drinkfles en in het bijzonder een drinkfles voorzien van een afgifte-opening voor het omvatten van een vloeistof zoals water. De uitvinding voorzien in een eerste aspect in een drinkfles voor het omvatten van een vloeistof, bij voorkeur water. De drinkfles is van een althans deels transparant co-polyester materiaal vervaardigd, en voorzien is van een afgifteopening voor afgifte en bijvullen van de vloeistof, zoals water. De uitvinding wordt gekenmerkt doordat de drinkfles in de omtrek om de afgifte-opening voorzien is een ring vormig lichaam dat concentrisch om de afgifte-opening is aangebracht en vervaardigd is van een compositie van ten minste twee kunststoffen waarbij de eerste kunststof een thermoplastische elastomeer betreft en de tweede kunststof een compositie omvattende van een thermoplastische elastomeer alsmede een aromatische olie voor het tijdens gebruik, bij het afgeven van de vloeistof uit de afgifteopening afgeven van een aroma.
Patent NL-2023762-B1 (NL)
Title: Chair and assembly of such chairs
Inventor: PETRUS HUBERTUS JOHANNES HELSLOOT
IPC: A47C3/04
Filed: 2019-09-04
Granted: 2021-05-12
Abstract: Chair (1) comprising a frame (2) with a leg or legs (3), a seat (4) and a backrest (5), wherein the seat (4) is tiltable with reference to the frame (2) between a non—tilted position wherein the chair (1) is ready for use, and a tilted position. In the tilted position the chair is stackable. The chair can form part of an assembly of chairs where— in the frame (2) of each chair (1) is provided with a profile (2') extending parallel to the seat (4) in the non—tilted posi— tion, and extending essentially perpendicular with reference to the back rest (5), wherein between any two neighbouring chairs (1) a connecting piece (9) connects the respective profiles (2') of the frames (2) of said neighbouring chairs (1).