baber/WOPTO huggingface dataset:
Patent CY-1115280-T1 (CY)
Title: Μεθοδος ρυθμισης εκφρασης γονιδιου
Inventor: CULLEN B R
IPC: C07H21/04
Filed: 2014-05-23
Abstract: Η παρούσα εφεύρεση αφορά, γενικά, σε έκφραση γονιδίου και, ιδιαιτέρως, σε μέθοδο παρεμπόδισης της έκφρασης γονιδίου στόχου και σε κατασκευάσματα κατάλληλα για χρήση σε τέτοια μέθοδο.
Patent CY-1117220-T1 (CY)
Title: Φρακτης με διχτυ και οπισθοανακλαστικες λωριδες
Inventor: KARATZIS ANTONIOS
IPC: E01F13/02
Filed: 2015-12-30
Abstract: Ένα δίχτυ περιλαμβάνει οπισθοανακλαστικά στοιχεία όπως ταινίες (26, 27) που εκτείνονται κατά την οριζόντια ή την κατακόρυφη διεύθυνση. Οι ταινίες (26, 27) συνδέονται στο δίχτυ μέσω ενός νήματος ή μίας κόλλας.
Patent CY-1120221-T1 (CY)
Title: Καρβοξυλιωμενα παραγωγα γλυκοζαμινογλυκανων και χρηση ως φαρμακα
Inventor: TORRI GIANGIACOMO
IPC: C08B37/08
Filed: 2018-02-23
Abstract: Η εφεύρεση αφορά σε παράγωγα γλυκοζαμινογλυκάνης, προικισμένα με ανασταλτική δραστικότητα ηπαρανάσης και κατά του όγκου δραστικότητα, που φέρουν ομάδες καρβοξυλικού στις θέσεις 2 και 3 τουλάχιστον τμήματος των υπολειμμάτων γλυκοζαμινογλυκάνης και στην διεργασία για την παρασκευή αυτών. Τα παράγωγα γλυκοζαμινογλυκάνης της παρούσας εφεύρεσης δημιουργούνται ξεκινώντας από φυσικές ή συνθετικές γλυκοζαμινογλυκάνες, κατά προτίμηση ηπαρίνη ή ηπαρίνη χαμηλού μοριακού βάρους, προαιρετικώς 2-O- και 2Ν-αποθειωμένες με δύο στάδια οξείδωσης. Με την πρώτη οξείδωση, οι γειτονικές διόλες και προαιρετικώς το γειτονικό ΟΗ/ΝΗ2 των υπολειμμάτων γλυκοζαμινογλυκάνης μετατρέπονται προς αλδεΰδες και με την δεύτερη οξείδωση οι εν λόγω διαλδεΰδες μετατρέπονται προς καρβοξυλικές ομάδες. Η πρώτη οξείδωση κατά προτίμηση οδηγεί στην διάσπαση της διασύνδεσης C2-C3 του δακτυλίου οξειδώσιμων υπολειμμάτων. Η εφεύρεση περαιτέρω αφορά σε μία μέθοδο για την παρασκευή των εν λόγω παραγώγων γλυκοζαμινογλυκάνης και περαιτέρω στην χρήση τους ως δραστικά συστατικά φαρμάκων. Περαιτέρω, η εφεύρεση αφορά σε φαρμακευτικές συνθέσεις που περιλαμβάνουν παράγωγα δι/τρικαρβοξυλιωμένης ηπαρίνης, ως δραστικό παράγοντα.
Patent CY-1120876-T1 (CY)
Title: Συνθεση μεταλλικης μελανης για εκτυπωση ψεκασμου μελανης για υποστρωμα πολυβινυλοχλωριδιου
Inventor: AOKI KEITA
IPC: B41M5/00
Filed: 2018-09-05
Abstract: Η παρούσα εφεύρεση αφορά μια σύνθεση μεταλλικής μελάνης που είναι για εκτύπωση ψεκασμού μελάνης για ένα υπόστρωμα πολυβινυλοχλωριδίου, μπορεί να σχηματίσει εκτυπωμένο υλικό που έχει ανώτερη κατοπτρική στιλπνότητα και πλεονεκτική αντοχή στη χάραξη, και είναι ικανή να αποτρέπει την απόφραξη του ακροφυσίου τη στιγμή της εκτύπωσης ψεκασμού μελάνης, και πιο συγκεκριμένα αφορά σε μια σύνθεση μεταλλικής μελάνης που είναι για εκτύπωση ψεκασμού μελάνης για ένα υπόστρωμα πολυβινυλοχλωριδίου και που χαρακτηρίζεται από το ότι περιέχει τουλάχιστον μια ρητίνη πολυεστέρα (α) που έχει ένα μέσο μοριακό βάρος κατά βάρος όχι μεγαλύτερο από 12,000, μια διασπορά μεταλλικής χρωστικής (β) που προκύπτει από τη διασπορά μιας εξατμισμένης χρωστικής αλουμινίου μόνο σε ένα οργανικό διαλύτη, και ένα οργανικό διαλύτη (γ) που έχει διαλυτότητα αναφορικά με το υπόστρωμα πολυβινυλοχλωριδίου.
Patent CY-1122334-T1 (CY)
Title: Νεες κρυσταλλικες mopφeς του αλατος μονονατριου της φορμασουλφουρονης
Inventor: ANTONS STEFAN
IPC: A01P21/00
Filed: 2019-11-28
Abstract: Η παρούσα εφεύρεση αναφέρεται σε μία νέα κρυσταλλική μορφή του άλατος μονονατρίου της φορμασουλφουρόνης (τύπος I), μία διαδικασία για την παρασκευή της εν λόγω κρυσταλλικής μορφής, τη χρήση της σε αγροχημικά παρασκευάσματα καθώς και σε συγκεκριμένες συνθέσεις, μίγματα ή αντιστοίχως αγροχημικά παρασκευάσματα που περιέχουν την εν λόγω κρυσταλλική μορφή, καθώς επίσης και σε ένα νέο επιδιαλυτωμένο σύμπλοκο μονομεθανόλης του άλατος μονονατρίου της φορμασουλφουρόνης.
Patent CY-1124200-T1 (CY)
Title: Μεθοδος και διαταξη για εγκωδικευση και αποκωδικευση καναλιου σε συστημα επικοινωνιας που χρησιμοποιει κωδικες εξελεγχου ισοτιμιας χαμηλης πυκνοτητας
Inventor: MYUNG SEHO
IPC: H03M13/11
Filed: 2021-06-04
Abstract: Μέθοδος και διάταξη για εγκωδίκευση και αποκωδίκευση καναλιού σε σύστημα επικοινωνίας που χρησιμοποιεί κώδικα Εξελέγχου Ισοτιμίας Χαμηλής Πυκνότητας (LDPC). Η μέθοδος εγκωδίκευσης περιλαμβάνει προσδιορισμό σχήματος διαμόρφωσης για μετάδοση συμβόλου• προσδιορισμό σχηματομορφής βράχυνσης λαμβανομένου υπόψιν του προσδιορισμένου σχήματος διαμόρφωσης• ομαδοποίηση στηλών που αντιστοιχούν σε λέξη πληροφορίας σε μητρώο εξελέγχου ισοτιμίας του κώδικα LDPC σε πλήθος ομάδων στηλών• αναδιάταξη των ομάδων στηλών σε σειρά• προσδιορισμό μιας περιοχής της παραγόμενης λέξης πληροφορίας που είναι επιθυμητό να ληφθεί με βράχυνση της λέξης πληροφορίας• με βάση την περιοχή της παραγόμενης λέξης πληροφορίας, εκτέλεση βράχυνσης ανά ομάδα στηλών στις εν σειρά διατεταγμένες ομάδες στηλών της λέξης πληροφορίας, σύμφωνα με την προσδιορισμένη σχηματομορφή βράχυνσης• και εγκωδίκευση με LDPC της επιβραχυμένης λέξης πληροφορίας.
Patent CY-1124964-T1 (CY)
Title: Τοπικη συνθεση για την θεραπευτικη αντιμετωπιση δερματικων διαταραχων συμπεριλαμβανομενης της ανδρικης τριχοπτωσης
Inventor: HASSON VICTOR
IPC: A61K9/06
Filed: 2021-12-06
Abstract: Η παρούσα εφεύρεση παρέχει ένα λιποσωμικό τοπικό σκεύασμα ή ένα λιποσωμικό τοπικό σκεύασμα βάσης που έχει πυριτικά συστατικά που σχηματίζουν φραγμό, μεθόδους για την παρασκευή τους και μεθόδους για τη χρήση τους στη θεραπεία δερματολογικών ασθενειών και καταστάσεων, συμπεριλαμβανομένης της ανδρικής φαλάκρας.
Patent GR-900300138-T1 (GR)
Title: Expandable intraluminal graft
Inventor: SCHATZ RICHARD A
IPC: A61F2/82
Filed: 1991-09-27
Abstract: A plurality of expandable and deformable intraluminal vascular grafts are expanded within a blood vessel by an angioplasty balloon associated with a catheter to dilate and expand the lumen of a blood vessel. The grafts may be thin-walled tubular members (71) having a plurality of slots (82) disposed substantially parallel to the longitudinal axis of the tubular members (71), and adjacent grafts are flexibly connected by a single connector member disposed substantially parallel to the longitudinal axis of the tubular members.
Patent SI-1204724-T1 (SI)
Title: Process and device for waste pyrolysis and gasification
Inventor: RONCHI DOMENICO
IPC: C10J3/66
Filed: 2000-07-11
Abstract: A process is disclosed for the pyrolysis and gasification of waste materials, in particular of special and/or hazardous waste materials, comprising a gasification and melting step, a step of treatment of the mixture of the obtained gases, and a vitrification step, wherein said steps provide for the following passages: a) the material to be treated, at a temperature comprised between 1300 and 1500° C., is gasified for a lapse of time comprised between 3 and 15 seconds, and melt for a time comprised between 5 and 30 minutes, in total absence of air, obtaining a mixture of combustible gases, non-combustible gases and inert gases, through at least two gasification steps carried out in a sequence, wherein the temperature is maintained constant through the use of at least one thermal lance in any one of the gasification steps; b) the mixture of combustible and non-combustible gases thus obtained is subjected to purification and energy-recovery treatments; c) the inert gases, or inorganic and mineral proportion, are extracted in vitrified state. Further on, a device for carrying out such process is disclosed.
Patent SI-1361215-T1 (SI)
Title: Process for producing quinoline carboxyaldehyde derivative and intermediate thereof
Inventor: HARADA KATSUMASA
IPC: C07D215/14
Filed: 2002-02-14
Abstract: 2-Cyclopropyl-4-(4'-fluorophenyl)quinoline-3-carboxyaldehyde useful as a material for pharmaceutical products, can be obtained by reacting 3-cyclopropyl-3-oxopropanenitrile with 2-amino-4'-fluorobenzophenone to obtain 2-cyclopropyl-4-(4'-fluorophenyl)quinoline-3-carbonitrile, and reducing it.
Patent SI-1362530-T1 (SI)
Title: Device for coupling the baseboard of a piece of furniture to the foot of said piece of furniture
Inventor: SCUDIERO PAOLO
IPC: A47B91/00
Filed: 2003-05-12
Abstract: A device for coupling the baseboard (11) of a piece of furniture (11a) to the foot (12) of the piece of furniture, particularly but not exclusively for kitchen furniture, comprising fixing means (13, 14) suitable to associate the baseboard (11) with the foot (12) of the piece of furniture by elastic coupling removable after installation, the fixing means comprising a first coupling body (13) that is fixed to the foot (12) and to which a second coupling body (14), fixed to the baseboard (11), is detachably coupled. <IMAGE>
Patent SI-1567120-T1 (SI)
Title: Abrasive compositions for clear toothpaste
Inventor: KOSTINKO JOHN A
IPC: A61K8/00
Filed: 2003-09-04
Abstract: A transparent dentifrice is provided that has excellent abrasive performance. The dentifrice comprises from about 10 wt % to about 13 wt % water, and an abrasive, low-structure, precipitated silica having: a refractive index of from about 1.439 to 1.450, an oil absorption of from about 90 ml/100 g to about 120 ml/100 g, a light transmittance of greater than about 60%; and a Brass Einlehner abrasion value of less than about 5 mg loss/100,000 rev. Additionally the dentifrice has: a haze value of less than about 50; an RDA of about 50 to 200; and a refractive index of from about 1.439 to 1.450.
Patent SI-1815755-T1 (SI)
Title: Improvement of intestinal barrier integrity
Inventor: VAN TOL ERIC ALEXANDER FRANCIS
IPC: A23L33/00
Filed: 2004-06-22
Abstract: The invention concerns a method for stimulating barrier integrity in a mammal by administering to a mammal a composition comprising: eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and arachidonic acid (ARA),; and at least two distinct oligosaccharides.
Patent SI-1740164-T1 (SI)
Title: Statins for the treatment of ocular hypertension and glaucoma
Inventor: HELLBERG MARK R
IPC: A61K31/00
Filed: 2005-04-25
Abstract: The use of HMG-CoA reductase inhibitors (e.g., statins) to treat glaucoma, control intraocular pressure, preserve the trabecular meshwork, protect against ocular neurodegeneration and/or protect against glaucomatous retinopathy is described. The preferred HMG-CoA reductase inhibitors, which are statins having an RI value of 0.2 to 0.7 (e.g., pravastatin), are administered via topical application to the affected eye(s) of the patient.
Patent SI-1767545-T1 (SI)
Title: GLP-1 (Glucagon-like peptide-1) fusion polypeptides with increased peptidase resistance
Inventor: GEIGLE PETER DR
IPC: C07K14/00
Filed: 2005-09-22
Abstract: The present invention provides fusion peptides having GLP-1 activity and enhanced stability in vivo, in particular resistancy to dipeptidyl peptidase IV. The fusion peptide comprises as component (I) N-terminally a GLP-1 (7-35, 7-36 or 7-37) sequence and as component (II) C-terminally a peptide sequence of at least 9 amino acids or a functional fragment, variant or derivative thereof. Component (II) is preferably a full or partial version of IP2 (intervening peptide 2). A preferred embodiment comprises the sequence GLP-1(7-35, 36 or 37)/IP2/GLP-1(7-35, 36 or 37) or GLP-2. The fusion peptide may be produced in engineered cells or synthetically and may be used for the preparation of a medicament for treating various diseases or disorders, e.g. diabetes type 1 or 2, apoptosis related diseases or neurodegenerative disorders.
Patent SI-1941488-T1 (SI)
Title: Method used to tune an electronic organ with associated air organ pipes
Inventor: LUCIANI ROLANDO
IPC: G10H1/00
Filed: 2006-01-23
Abstract: The present invention refers to a method used to automatically tune, thanks to the presence of a suitably designed electronic device, an electronic organ with the air organ pipes associated with it; it being provided, in particular, that the said operation is performed based on the tuning variations detected in real time on the air pipes based on parameters referring to the frequency of the emitted sound and to environmental temperature.
Patent DE-3486447-T2 (DE)
Inventor: LEVINE STEVEN N
IPC: H03K5/13
Filed: 1984-12-31
Granted: 1997-10-23
Abstract: An improved multiple frequency digital phase-locked loop circuit 10 is described. The improved digital phase-locked loops utilizes a single circuit 12 to effect both phase and frequency adjustments. The multiple frequency digital phase-locked loop effects phase adjustments by selectively combining or subtracting a reference clock signal 30 with a derived programmable clock signal thereby generating a composite digital phase-locked loop clock signal. The multiple frequency provides frequency adjustments by selectively adding or subtracting pulses from the composite clock signal at a rate determined by a programmably controllable clock signal. The improved multifrequency digital phase-locked loop is suitable for use as a tone detector with the addition of a lock detector 22 wherein the phase-locked loop can be programmed for a plurality of known operating frequencies. <IMAGE>
Patent DE-3587394-T2 (DE)
Inventor: LUCIW PAUL A
IPC: C12N15/48
Filed: 1985-10-30
Granted: 1994-01-05
Abstract: Recombinant hTLR proteins are made using expression vectors containing DNA constructs derived from ARV-2 nucleic acid. These proteins are useful in serological immunoassays to detect antibodies to hTLR.
Patent DE-3779515-T2 (DE)
Inventor: MERRY DEL VAL DOMINGO MERRY DE
IPC: A61M1/28
Filed: 1987-06-22
Granted: 1993-02-11
Abstract: The present invention relates to a device for use in peritoneal dialysis providing a sterile connection between (a) a catheter line (CL) and (b) a line (LS) for draining fluid from the peritoneal cavity and a line (LC) for supplying fresh fluid to the cavity. The device includes:   (l) a housing (SL) having an external thread and which is connected at the end of the inflow/draining line (LC/LS) and in which there is provided a sheath (SLP) covering a hollow spike (SLC); (2) a cap (SC) enclosing between two perforatable membranes (SCM and SCFM) sterilizing medium. (3) a connector (F) attached to the catheter line (CL) and having a spike for penetrating the second cap membrane (SCFM);   (4) a clamp (K) on the catheter line (CL), and (5) a key (SK) attached to the housing for opening the clamp (K); if the key is not fitted to the clamp (K), the clamp (K) automatically closes.   At the beginning of a session to replace dialysis fluid, the cap (SC) is fitted on the connector (F) and the clamp is closed. The housing (SL) is attached to the cap by a screwthread connection and this causes the spike (SLC) to penetrate the cap membrane (SCM) causing the sterilizing fluid to flow through the housing into the lines (LC and LS), thereby sterilizing these parts. The key (SKL) is used to open the clamp (K) causing fluid in the peritoneal cavity to flow through the device into drainage line (LS). Fresh dialysis fluid is then fed into the cavity by way of the line (LC). The clamp (K) is then closed and the cap (SC) and the housing (SL) are removed from the connector (F) and a fresh cap (SC) fitted instead. The spike (FC) on the connector (F) penetrates the second cap membrane (SCFM), allowing sterilizing fluid to sterilize the connector and the part of catheter line (CL) up to the clamp (K).
Patent DE-3780198-T2 (DE)
Inventor: BOFFARDI BENNETT P
IPC: C02F5/12
Filed: 1987-03-26
Granted: 1992-12-17
Abstract: The present invention is directed to a method to stabilize aluminum ions in recirculating water systems comprising adding to the system 0.1 to 1,000 ppm of a water-soluble polymer having an intrinsic viscosity of 0.05 to 2.5 dl/g in 1.0 M NaCl, prepared from: (A) 35 to 90%, by weight, of an unsaturated carboxylic compound selected from the group consisting of acrylic acid, methacrylic acid, their salts and mixtures thereof; and B) 10 to 65%, by weight, of an unsaturated sulfonic compound selected from the group consisting of 2-acrylamido-2-methylpropylsulfonic acid, 2-methacrylamido-2-methylpropylsulfonic acid, their salts and mixtures thereof.
Patent DE-3789590-T2 (DE)
Inventor: WOODWARD STEVEN J
IPC: G01F23/28
Filed: 1987-10-02
Granted: 1994-07-28
Abstract: Programmable apparatus for monitoring an industrial installation, such as for measuring the depth of material in bins or silos, utilizes a computer having a hermetically sealed case (60), with an externally visible display (38) and necessary connections to the installation being monitored. The computer includes non-volatile random access memory (10) for the storage of operating parameters which is written to under control of a portable external programming unit (58) which can temporarily access the computer via an infrared or equivalent communications link (2, 4). The case (60) of the computer has provision (74) for temporary docking of the programming unit, which has a keypad (54) for the selection of calibration and diagnostic routines, and the entry of data or commands to be transmitted to the computer.
Patent DE-3854647-T2 (DE)
Inventor: DEWALD RAYMOND
IPC: C23F14/02
Filed: 1988-07-26
Granted: 1996-03-21
Abstract: A composition having the formula  <IMAGE>  wherein n has an average value of one to about five, is disclosed for use in reducing or eliminating the formation of reactor scale during the polymerization of vinyl chloride and comonomers. The composition is prepared by reacting phenothiazine with formaldehyde in the presence of a liquid diluent that is a solvent for the phenothiazine, but a non-solvent for the dimer of phenothiazine and formaldehyde. The process of the invention is preferably conducted in the presence of a strong acid catalyst. The formaldehyde is preferably added slowly to the reaction mixture over the course of the reaction. The product can be filtered and dried.
Patent DE-3855916-T2 (DE)
Inventor: MATHER JAMES
IPC: A63B53/14
Filed: 1988-07-29
Granted: 1997-08-28
Abstract: The swing of a golf club is changed by adding an additional weight, the center of gravity of the additional weight being at or below the center of gravity of the hand position on the gripping region of the club to provide a positive lever action for the club in the first cocked movement of the swing substantially the same moment of inertia in the first phase of the downswing wherein the golfer's hands are in the cocked position as conventional clubs and to provide a reduced moment of inertia for the club in the second uncocked movement of the swing between the uncocking of the golfer's hands and the striking of a golf ball.
Patent DE-3878657-T2 (DE)
Inventor: NONINI GEREMIA
IPC: B21C27/00
Filed: 1988-03-02
Granted: 1993-06-09
Abstract: Direct or indirect extrusion press which comprises a container (20) that defines a chamber (19) to hold a billet (11) to be extruded, a ram (12), a die (14), a die holder (41), a base (13) and a shears (15) to shear heels (17) of the billets (11), the die (14) being capable of movement axial to the container (20) or viceversa, the container (20) defining at least two chambers (19) and being able to move in a plane perpendicular to the plane on which the axis of the chamber (19) and die (14) lies. Extrusion plant which comprises a press as described above and includes three stations that perform extrusion (19a), charging (19b) and the cleaning and readying of chambers (19c) respectively, the stations cooperating respectively with the chambers (19).
Patent DE-3881506-T2 (DE)
Inventor: HAVETTE BERNARD
IPC: B65D1/34
Filed: 1988-02-11
Granted: 1993-09-23
Abstract: This package which can be used for the separate reheating of two separate constituents comprises an annular trough (1) allowing the reheating of the constituent contained in it and a central cup (2) allowing the constituent contained in it to be maintained at a temperature distinctly lower than the preceding one, the said trough and cup being made from a material which does not absorb microwave energy and the height of the central cup being equal to or less than that of the annular trough. <IMAGE >
Patent DE-60000139-T2 (DE)
Inventor: MATSUMOTO SHUZO
IPC: H01R13/24
Filed: 2000-01-13
Granted: 2002-11-28
Abstract: A press-contact electrical interconnector (17) for interconnecting an electronic circuit board and a subject electronic circuit board by being inserted between them is comprised of an insulative foam elastomer (15); an insulative rubber sheet (2A) having a section roughly in a U shape which covers the surface, one side and the backside of the insulative foam elastomer (15), while exposing the both end faces and the other side of the insulative foam elastomer; a plurality of conductive threads (3) adhered and secured roughly in a U shape on the insulative rubber sheet (2A) and provided in proximity in a row arrangement at roughly equal pitches in the direction of from one end face toward the other end face of the insulative foam elastomer; and an insulative protective rubber sheet of high hardness provided on the other side of the insulative foam elastomer. Either one of the plurality of conductive threads (3) on the surface of the insulative rubber sheet and the plurality of conductive threads on the backside thereof is made to be capable of contacting with the electronic circuit board, the other being capable of contacting with the subject electronic circuit board, or still furthermore an insulative deformation-restraining rubber sheet of high hardness is adhered and secured to the plurality of conductive threads on one side of the insulative rubber sheet. <IMAGE>
Patent DE-60000596-T2 (DE)
Inventor: RICHET DANIEL
IPC: H01R13/658
Filed: 2000-07-06
Granted: 2003-06-05
Abstract: A triaxial contact (1) comprising three contacts (2, 3, 4) retained by a front insulator (5) which is anchored in a cavity (7) of a first cylindrical contact (2). A triaxial contact such that an intermediate contact (3) is harpooned inside a first receptacle of the front insulator. The front insulator is such that it bas a second receptacle (30) allowing to accommodate and insulate the central contact, said triaxial contact has a rear insulator (6) allowing to retain the intermediate contact and the central contact inside the cavity of the first contact.  <IMAGE>
Patent DE-60003875-T2 (DE)
Inventor: WEINL GEROLD
IPC: C22C29/04
Filed: 2000-05-02
Granted: 2004-06-03
Abstract: The present invention relates to a sintered body of a carbonitride alloy with titanium as main component which has improved properties particularly when used as cutting tool material in light finishing cutting operations at high cutting speed. This has been achieved by combining a carbonitride based hard phase of specific chemical composition with an extremely solution hardened Co-based binder phase. <IMAGE>
Patent DE-60004746-T2 (DE)
Inventor: PELEMAN GUIDO
IPC: B42F7/14
Filed: 2000-07-17
Granted: 2004-07-01
Abstract: File folder, comprising a first sheet (2) made of a rigid material having a first edge, a second edge and two side edges (14); a second sheet (3) made of a rigid material having a first edge, a second edge and two side edges (15); a back section (4) flexibly connecting said first sheet (2) and said second sheet (3) to each other at said first edges; an inwardly directed flap (5) made of a rigid material connected to at least one of said sheets (2-3) at the second edge thereof; and connecting side pieces (7) which connect said flap (5) to said at least one of said sheets (2-3) at the side edges (14-15) thereof, such that said flap (5) is kept spaced at a distance from said at least one of said sheets (2-3), said connecting side pieces (7) being attached to said flap (5) and said at least one of said sheets (2-3) by mechanical connections (17-18-19); and locking elements which can be inserted between the flap (5) and the said at least one of said sheets (2-3) at said side edges (14-15), said elements preventing the mechanical connections (17-18-19) from becoming loose and consisting of discrete elements which are separate from said connecting side pieces (7).  <IMAGE>