baber/WOPTO huggingface dataset:
Patent FR-2460221-A1 (FR)
Title: Dispositif de prise de force pour tracteur
Inventor: RONE MASATSUGU
IPC: F16H57/02
Filed: 1980-04-29
Abstract: A.DISPOSITIF DE PRISE DE FORCE POUR TRACTEUR. B.DISPOSITIF CARACTERISE EN CE QU'IL COMPREND UNE BOITE DE TRANSMISSION 3 MUNIE D'UNE OUVERTURE INFERIEURE 27, UN PREMIER ARBRE DE PRISE DE FORCE 13 MONTE A L'ARRIERE DE LA BOITE 3, UN PREMIER DISPOSITIF D'ARBRE DE PRISE DE FORCE INTERMEDIAIRE SITUE A LA PARTIE INFERIEURE DE LA BOITE DE TRANSMISSION 3 POUR TRANSMETTRE LA PUISSANCE AU PREMIER ARBRE 13, UN MECANISME DE CHANGEMENT DE VITESSE DE PRISE DE FORCE 16 COMPORTANT UN ENGRENAGE DE DEPLACEMENT 24 MONTE DANS LE PREMIER DISPOSITIF D'ARBRE INTERMEDIAIRE ET SE CLAVETANT SELECTIVEMENT EN PRISE AVEC L'UN OU L'AUTRE DES ENGRENAGES D'ENTRAINEMENT 21, 22. C.L'INVENTION S'APPLIQUE AUX TRACTEURS AGRICOLES.
Patent FR-2482177-A1 (FR)
Title: Tamper proof seal for railway wagon - has strap with male and female ends engaging by flexible deformation
Inventor: BELL RAMON RICARDO ARIAS
IPC: G09F3/03
Filed: 1980-05-06
Abstract: The tamper proof seal consists of a strap. One end of this has a male part and attachment. The other has a corresponding female part. This is box like and has internal grips for the male part. The male part is flexibly deformed when fixed and regains its shape when released. The male part has two opposed branches (5) in V form each with an external web (6), with one end fixed to the strap. There is also an internal web (7) with one end fixed to the free end of the other web, making an acute angle with the first.
Patent FR-2483499-A1 (FR)
Title: Electric steel making installation - with minimal distance between electrical supply and electrodes
Inventor: MICHELET JACQUES
IPC: F27D11/10
Filed: 1980-06-03
Abstract: An electric steel making installation comprises an open-topped vessel and electrical energy supply equipment placed one above the other and sepd. by a platform having a hole just above the vessel for passage of electrodes. The electrical supply equipment is grouped around the immediate periphery of the hole. Pref. the hole is covered by a fume-collecting hood. The electrical supply equipment is positioned close to the electrodes, irrespective of the design or capacity of the vessel.
Patent FR-2458975-A1 (FR)
Title: Rapid mounting for electrical equipment - has hinged wire hoop on equipment locking in mounting rail
Inventor: BOKER GUNTER
IPC: H02B1/052
Filed: 1980-06-04
Abstract: The rapid fixing element for mounting electrical equipment onto a support rail takes the form of a flexible bolt fixed in a guide at the rear of an instrument case. It consists of a U-shaped wire hook with shoulders (1a,1b) which engage with complementary hollow stages in a guide. The ends of the wire are bent together and carry a locking element (5). The profile of the shoulders of the hook and the guide is arranged so that the movement of the bolt in one sense is blocked by the action of the shoulders but in the other sense is only prevented by contact of the locking element with the instrument.
Patent FR-2479162-A1 (FR)
Title: Dispositif d'enroulement a rouleaux porteurs pour bandes de matieres continues
Inventor: HARTMUT PETERS
IPC: B65H18/20
Filed: 1980-06-04
Abstract: DISPOSITIF D'ENROULEMENT COMPRENANT DEUX ROULEAUX PORTEURS A AXES PARALLELES ET DESTINE A ENROULER DES BANDES CONTINUES DE PAPIER OU D'UNE MATIERE ANALOGUE TRAITEES PAR DES MACHINES. POUR AMORTIR DES VIBRATIONS IL EST MONTE A L'INTERIEUR DE CHAQUE ROULEAU PORTEUR 1 UN SYSTEME D'AMORTISSEMENT DYNAMIQUE 11 DONT LA FREQUENCE PROPRE EST ACCORDEE A LA FREQUENCE PROPRE DES VIBRATIONS DU ROULEAU PORTEUR CONCERNE.
Patent FR-2465903-A1 (FR)
Title: Alternating action electromagnetic piston pump - has magnetic piston acting against spring in body surrounded by excitation coil housed within cylindrical shell
Inventor: ROSSI LUIGI
IPC: F04B17/04
Filed: 1980-07-16
Abstract: The pump has a piston which provides compression and exhaust. The pump provides a small flow, normally working at about 25Hz, typically being used in EXPRESSO (RTM) machines. The pump is designed to be easily dismantled to allow cleaning without calling in specialised staff and also to minimise noise occuring when the synthetic rubber ring sealing the end of the pump to the piston deteriorates. The pump has a magnetic piston working, against a spring during the output cycle, and driven by a surrounding coil. This is housed within a shell keyed to the piston chamber wall. This is in turn screwed into the upper chamber containing two spring valves which are accessible from either end of the chamber. The movement of the piston rod within this chamber is sealed by an '0' ring.
Patent FR-2466428-A1 (FR)
Title: Transverse or four-way forklift truck - travels on four wheels rotated about vertical axis and incorporating hydraulic lifting cylinders
IPC: B66F9/06
Filed: 1980-10-02
Abstract: The truck has a vertical mast, which is U-shaped in cross section and encloses a load handling fork which is raised and lowered between its arms. The truck travels on four wheels which can be swung around a vertical axis, as well as rotating about a horizontal axis. The two wheels each side of the mast are double wheels (4,5) which can be raised and lowered by hydraulic actuators. In one design, the wheel axles (19) are mounted each side of a housing (7) which itself acts as the hydraulic actuator. This encloses and is supported by a block (21) with a supply channel (22) down the middle for hydraulic liquid, so as to act as a piston.
Patent FR-2491612-A1 (FR)
Title: Marquee pole position and orientation controller - has rule parallel to pole at two points to which are attached cables tethered to reference point, forming triangle
IPC: G01B5/24
Filed: 1980-10-08
Abstract: This device simultaneously gives the inclination (a) of a pole (1) and the distance (d) between its base and a reference point (2) on the ground, and is used when erecting a light shelter such as a marquee with a central pole and peripheric poles. The device comprises a rod (3) fitted with a spirit level (7) and a cable (4). The rod (3) is placed along the pole (1). The cable has two ends fixed to the ends (5,6) of the rod (3) and one end fixed to the reference point (2) on the qround. Thus the triangle formed is in the vertical plane containing the pole (1) and the reference point (2). The angle between the spirit level and the rod is made equal to the wanted inclination angle (a) of the pole.
Patent FR-2494537-A1 (FR)
Title: Solar powered intermittently lit road sign - has battery storing electricity produced during daylight for use when vehicle is detected
IPC: H05B37/02
Filed: 1980-11-18
Abstract: The solar powered illuminated road sign includes a panel mounted on top of the post. The panel comprises solar cells and may be adjusted about vertical and horizontal axes. The electrical output from the solar cell may be fed via a regulator to a storage battery. The road sign includes three lights and these are powered by the battery. A programmable clock controls the operation of the lights, or alternatively a device detecting the proximity of a vehicle may control the operation. The lights may be discharge tubes, in which case a DC-DC converter is required to provide the necessary voltage. The size of the solar panel and battery may be varied according to the amount of traffic, and hence the amount of use the lights will get.
Patent FR-2494472-A1 (FR)
Title: Stand to hold and move musical scores - has score printed on flexible strip mounted on rollers and driven by pedal controlled motors
IPC: G10G1/00
Filed: 1980-11-20
Abstract: The stand for single strip musical scores has rollers to move the position of a score printed on a flexible strip (5,5a). The movement is at constant speed and is, preferably, adjustable. The drive (8a,8b) indexes the score at a constant rate and amplitude. There are two rollers (4a,4b) rotating parallel to each other on two sides of the stand (3). A pedal (6), and flexible cable (7) can control movement of the score and also its speed. The strip is divided into lengths corresponding to a normal page.
Patent FR-2494590-A1 (FR)
Title: Reservation board for tennis court - has compartments with tie bar extending between sides, and with locks
IPC: A63B71/06
Filed: 1980-11-21
Abstract: The reservation board, for instance for a tennis court, consists of a board in which are compartments each of which has a tie bar to which are fixed a set number of locks, such as padlocks with code numbers identifying each user. Each compartment has two parallel sides between which the bar extends. Movable fixtures for the two sides enable them to be moved so that the padlocks can be removed.
Patent FR-2495440-A1 (FR)
Title: Machine to separate fish into fillets and skeleton - with precision which practically eliminates manual trimming of fillets (SE 14.6.82)
Inventor: HARTMANN FRANZ
IPC: A22C25/16
Filed: 1980-12-05
Abstract: Each fish is conveyed, belly down and head end leading, over the following cutting stations: (1) A pair of rotary disc, ventral cavity cutters which sever the ventral fibres right through to the backbone; (2) a pair of convergent, rotary disc cutters which part the bones contg. the vertebral appendaged from the two sides of the backbone; (3) a pair of rotary disc cutters to sever the dorsal fibres around the root of the dorsal fin; (4) a pair of convergent, rotary disc cutters which almost meet behind the backbone to sever the roots of the dorsal fillets; and (5) a pair of horizontal, rotary disc cutters which incise laterally to part off the ventral fillets. Finally, the fish continues to advance longitudinally beneath a pair of rotary disc cutters which come in on opposite sides of the dorsal fin, down to the backbone, parting off the dorsal fillets from the skeleton. The process and machine are for cutting fish fillets from the skeleton.
Patent FR-2476651-A1 (FR)
Title: Produit d'addition d'une substance a base de lignine sulfonee et d'un alcool benzylique hydroxyle, procede d'obtention et composition de colorant le contenant
Inventor: LIN STEPHEN Y
IPC: C08H7/00
Filed: 1980-12-09
Abstract: L'INVENTION CONCERNE DES DISPERSANTS POUR COLORANTS. DES DISPERSANTS SPECIALEMENT APPROPRIES POUR DES COLORANTS INSOLUBLES SONT OBTENUS PAR REACTION DE COMPOSES D'ALCOOL BENZYLIQUE HYDROXYLE AVEC DES DERIVES DE LIGNINE SULFONEE. LES DISPERSANTS POSSEDENT UN DEGRE ELEVE DE STABILITE THERMIQUE ASSOCIE A DES PROPRIETES AVANTAGEUSES DE FAIBLE REDUCTION, DES COLORANTS DE FAIBLE ASSOMBRISSEMENT DE LA TEINTE, DE MOUSSAGE REDUIT, DE BROYAGE FACILITE ET DE DIMINUTION DE LA VISCOSITE DES PATES. APPLICATION: DISPERSION DES COLORANTS.
Patent FR-2498296-A1 (FR)
Title: Portable electric torch - has plastics cylinder with slot allowing sliding contact to touch side of bulb base
Inventor: LIEVIN ROBERT
IPC: F21L4/00
Filed: 1981-01-16
Abstract: The electric torch comprises a metal box housing a flat battery, and a plastic casing supporting a bulb within a reflector. The plastic casing has two plates which make contact with the terminals of the battery. One plate is arranged to contact the base of the lamp which is held in a plastic cylinder in the centre of the plastic casing. The cylinder has a slot in the side which enables a conductive 'tongue' to touch the side of the lamp. The tongue is attached to a sliding switch on the outside of the plastic casing. The tongue moves as the switch is moved so that in one position it touches both the plate associated with the second battery terminal, and the side of the lamp base. The axis of the lamp reflector is at right angles to the plane of the flat battery.
Patent FR-2478611-A1 (FR)
Title: Verrou mat de roulement de chariot elevateur a fourche
Inventor: BENSON SAMUEL LEWIS
IPC: B66F9/24
Filed: 1981-03-16
Abstract: VERROU POUR LE MAT TELESCOPIQUE D'UN CHARIOT ELEVATEUR A FOURCHE. LE CHARIOT COMPORTE UN MAT FIXE 24 QUI PORTE UN SECOND MAT MOBILE 28 SUR LEQUEL EST MONTE COULISSANT UN CHASSIS MOBILE 30 QUI PORTE LA FOURCHE 32. UN VERROU A RESSORT 46 PORTE PAR LE MAT MOBILE EST REPOUSSE PAR UNE CAME 50 PORTEE PAR LE CHASSIS MOBILE DANS UN ORIFICE FORME DANS LE MAT FIXE LORSQUE LE CHASSIS MOBILE EST ABAISSE A UN NIVEAU INFERIEUR A L'EXTREMITE INFERIEURE 44 DU MAT MOBILE 28 DE FACON A SOLIDARISER LES DEUX MATS POUR EVITER QUE LES GALETS INFERIEURS 38 DU CHASSIS MOBILE ACCROCHENT LE MAT MOBILE ET LE SOULEVE ACCIDENTELLEMENT LORSQUE LE CHASSIS MOBILE EST SOULEVE A PARTIR DE SA POSITION BASSE. LE VERROU SE DEVERROUILLE AUTOMATIQUEMENT DES QUE LE CHASSIS MOBILE A ETE SUFFISAMMENT SOULEVE. APPLICATION AUX CHARIOTS ELEVATEURS A FOURCHE.
Patent FR-2487129-A1 (FR)
Title: Nickel oxide-hydrogen accumulators - using braided flexible metal wire as current collectors between electrodes and pole bolts
Inventor: GUTMANN GUNTER
IPC: H01M50/502
Filed: 1981-07-15
Abstract: The accumulator has a pressure-tight cylindrical cell housing with domed ends which each contain a pole bolt. In the housing is a stack of disk cells with an axial hole contg. two current removal leads connected to the negative and positive electrodes and located in two electrically insulated halves of the axial hole. The electrodes are connected to the pole bolts by flexible metal litz or braid. The axes of the pole bolts are aligned at 30-60, esp. 45 deg. w.r.t. the axis of the cell housing; and the pole bolts are sepd. from each other by 60, 120, or 180 deg. on a plane at 90 deg. to the axis of the housing. Accumulators of this type are used e.g. in satellites, and have long life despite high discharge cycles; and their state of charge is measured by the H2 pressure in the cell. The flexible metal braid or litz current removal leads are not subject to fracture; high currents can be obtd; and an accumulator with min. size can be mfd.
Patent FR-2489142-A1 (FR)
Title: Produit adhesif composite et serviette hygienique contenant un tel produit
Inventor: POMPLUN WILLIAM S
IPC: A61L15/58
Filed: 1981-08-05
Abstract: L'INVENTION CONCERNE LES PRODUITS ADHESIFS COMPOSITES PARTICULIEREMENT ADAPTES POUR PENETRER DANS UN SUBSTRAT POREUX 4 ET LE RENFORCER EN FAISANT ADHERER UNE SURFACE DU SUBSTRAT A UNE AUTRE SURFACE 5, 2. LE PROBLEME POSE CONSISTE A PERMETTRE A CE PRODUIT DE COOPERER AVEC DES MATIERES POREUSES A FAIBLE RESISTANCE A LA COHESION. SUIVANT L'INVENTION, UN TEL PRODUIT EST CARACTERISE EN CE QU'IL COMPORTE, D'UNE PART, AU MOINS UN POLYMERE EN EMULSION DANS L'EAU CHOISI DANS LE GROUPE COMPRENANT LES HOMOPOLYMERES D'ACETATE DE POLYVINYLE, LES COPOLYMERES D'ACETATE DE VINYLE-ETHYLENE, LES COPOLYMERES D'ACETATE ET MALEATE DE POLYVINYLE, LES COPOLYMERES ACRYLIQUES-ACETATE DE POLYVINYLE ET LES COPOLYMERES ACRYLIQUES, ET, D'AUTRE PART, AU MOINS UN POLYMERE SOLUBLE DANS L'EAU CHOISI DANS LE GROUPE COMPRENANT LA POLYVINYLPYRROLIDONE, UN ALCOOL POLYVINYLIQUE PARTIELLEMENT HYDROLYSE ET ALCOOL POLYVINYLIQUE COMPLETEMENT HYDROLYSE. L'INVENTION EST PRINCIPALEMENT UTILISEE SUR LES SERVIETTES HYGIENIQUES.
Patent FR-2488675-A1 (FR)
Inventor: SCHMID HANS
IPC: C02F1/48
Filed: 1981-08-07
Abstract: The apparatus has a gas discharge tube (4), a hollow cylinder (19) made of electrically conducting plastic, which is arranged coaxially to the gas discharge tube (4), a filter candle (21), which encloses the arrangement of gas discharge tube and hollow cylinder, and a housing (1), composed of an apparatus head (2) and a filter cup (3). The gas discharge tube (4) has a glass piston made of borosilicate glass and is provided internally and/or externally with an electrically conducting layer which extends over a part length of the gas discharge tube (4) and has a rough surface. An inductive heating element is arranged in the gas discharge tube. The water flowing into the apparatus is first filtered and then, during the forced passage through the treatment space (27), is exposed to an alternating current, as a result of which the crystal structure of the hardness-forming agents is transformed and lime deposition is avoided.
Patent FR-2514543-A1 (FR)
Title: Turntable with integral record clamp removing warps - uses ring mounted on threaded posts, raised and lowered by captive pinion meshing with fixed gear
IPC: G11B19/20
Filed: 1981-10-13
Abstract: The tuntable (1) has a clamping ring (2) placed directly above and parallel to the plane of the second. The ring is lowered by a screw (7,6) mechanism to exert a vertical force on the outer edge of the disc to press out any warping on the disc. The ring is supported by diametrically opposite threaded posts (6), with a pinion wheel (7) running on the screw thread. The screw and pinion are mounted in the turntable (1), and the pinion projects beyond the edge of the turntable, meshing with an internal ring gear (8) fixed to the base supporting the turntable. The rotation of the turntable causes the pinion to rotate, raising or lowering the threaded posts and thus the record clamping ring.
Patent FR-2516279-A1 (FR)
IPC: G06F13/36
Filed: 1981-11-09
Abstract: The single-chip computer contains a processor (2) which includes a control unit (3) for the computation process and an operation execution unit (4), a memory unit (5), a matching unit (6) for peripherals (peripheral apparatuses), a buffer-store element (7) and a control unit (8) for the information interchange via a system line, which items are connected by means of a two-directional line (1). The processor (2) also has a buffer-store element (13), a control unit (14) for the information interchange of the processor and an address comparison circuit (15), which items are coupled to one another. The single-chip computer contains a priority device (22) for the line and a priority device (23) for the system line, which priority devices are connected to the control unit (8) for the information interchange via the system line, and an address comparison circuit (39) for the system line, which is coupled to the buffer-store element (7).
Patent FR-2495322-A1 (FR)
Inventor: LUNDBERG PETER
IPC: G01N1/20
Filed: 1981-11-27
Abstract: A device for sampling a suspension flowing through a pipe, such as, in particular, a fibre suspension, comprises a cylinder which is attached to an opening in the pipe wall and accommodates an axially displaceable hollow piston which has a sampling chamber which is limited by a relatively displaceable piston and which can be filled with a sample collected from the suspension, and discharged, by means of a drive device which is common to the hollow piston and the piston.
Patent FR-2496938-A1 (FR)
Title: Carte d'identification dont les informations sont portees a l'aide d'un rayon laser au travers de motifs de securite disposes en surface tels que des guillochures et procede de realisation d'une telle carte
Inventor: MAURER THOMAS
IPC: B42D25/41
Filed: 1981-12-22
Abstract: LES INFORMATIONS PORTEES SUR LA CARTE, TELLES QUE LE NOM, LE NUMERO DE COMPTE, LA PHOTO 3 DU TITULAIRE, ETC, SONT PROTEGEES PAR UN MOTIF DE SECURITE 6 EN SURIMPRESSION, FORME PAR DES GUILLOCHURES, DES MOTIFS DIFFICILES A IMITER OU UNE SURFACE IMPRIMEE HOMOGENE. L'INFORMATION EST INSCRITE DANS LE MATERIAU DE LA CARTE 1 A TRAVERS LE MOTIF DE SECURITE IMPRIME 6 AU MOYEN D'UN SCRIPTEUR A RAYON LASER. DANS CETTE OPERATION L'ENERGIE DU LASER ET DES COULEURS DU MOTIF DE SECURITE IMPRIME SONT COORDONEES RELATIVEMENT DE FACON QUE LE RAYON LASER NE SOIT PAS ABSORBE PAR MOTIF DE SECURITE, CELUI-CI N'ETANT PAR CONSEQUENT PAS DETRUIT PAR LE RAYON. L'INFORMATION QUI EST A PROTEGER L'EST AINSI DE FACON PARTICULIEREMENT EFFICACE CONTRE LES TENTATIVES DE FALSIFICATION DU FAIT DU MOTIF DE SECURITE EN SURIMPRESSION, PUISQUE TOUTE MANIPULATION POSSIBLE DE LA CARTE APPARAIT IMMEDIATEMENT SOUS FORME DE DEGRADATION OU DE MODIFICATION DU MOTIF DE SECURITE EN SURIMPRESSION.
Patent FR-2497002-A1 (FR)
Title: Antenne directive multimode
Inventor: SMITH PETER W
IPC: H01Q21/00
Filed: 1981-12-23
Abstract: L'INVENTION CONCERNE UNE ANTENNE DIRECTIVE. L'ANTENNE DIRECTIVE COMPREND UNE PLURALITE D'ELEMENTS RADIANTS PLACES DANS UNE CONFIGURATION PLANE DIVISEE EN QUATRES QUADRANTS SEPARES. ELLE EST CAPABLE D'ETRE COMMUTEE ENTRE DEUX MODES, UN MODE A FAISCEAU EN FORME DE RAYON ETROIT ET UN MODE COSECTHCOSTH, PAR L'UTILISATION D'UN COMMUTATEUR UNIQUE ET D'UNE PAIRE DE DEPHASEURS. DANS LE MODE A FAISCEAU ETROIT L'ENERGIE TRANSMISE EST DIVISEE DE FACON SYMETRIQUE ENTRE LES QUATRES QUADRANTS. EN CHANGEANT LA POSITION DU COMMUTATEUR VERS SA SECONDE POSITION, LA PUISSANCE EST DEVIEE SEULEMENT DANS LA MOITIE SUPERIEURE DE L'ANTENNE ET UNE PAIRE DE DEPHASEURS INTRODUISENT UN DEPHASAGE DE L'ENERGIE SE PROPAGEANT VERS LES ELEMENTS RADIANTS LE LONG DE LA MOITIE INFERIEURE DE LA PARTIE SUPERIEURE DE L'ANTENNE. CECI PROVOQUE UN DIAGRAMME DE RADIATION ASYMETRIQUE DE L'ANTENNE CREANT UN FAISCEAU COSECTHCOSTH QUI EST BIEN APPROPRIE POUR LA CARTOGRAPHIE DU SOL.
Patent FR-2500469-A1 (FR)
Title: Processus de craquage avec solvant donneur d'hydrogene et procede de traitement de petrole brut
Inventor: GREENE MARVIN I
IPC: C10G47/34
Filed: 1982-02-25
Abstract: L'INVENTION CONCERNE UN PROCEDE DE CRAQUAGE AVEC SOLVANT DONNEUR D'HYDROGENE. SELON L'INVENTION, UN LIQUIDE CARBONACE LOURD AYANT UN POINT DE FUSION INFERIEUR A 250C EST AMELIORE EN PRODUIT PLUS LEGER PAR CRAQUAGE AU SOLVANT DONNEUR D'HYDROGENE 12, EN UTILISANT UN SOLVANT RECYCLE DERIVE AU MOINS PARTIELLEMENT D'UNE FRACTION DE DISTILLAT MOYEN SOIT DU LIQUIDE CARBONACE LOURD OU DES PRODUITS CRAQUES, EN SOUMETTANT A UNE OU PLUSIEURS ETAPES D'HYDROTRAITEMENT CATALYTIQUE EN 20 AVANT RECYCLAGE. L'INVENTION S'APPLIQUE NOTAMMENT A L'INDUSTRIE DU PETROLE.
Patent FR-2523023-A1 (FR)
Title: Secateurs with blade and anvil - uses compound curvatures on cutting edge and anvil giving constant angle subtended by intersect tangents
Inventor: SCHWARTZMANN PATRICK
IPC: A01G3/02
Filed: 1982-03-09
Abstract: The secateurs comprise two intersecting articulated arms (1,2) incorporating a cutting edge (T) and an anvil (E) respectively. An efficient cutting action regardless of the diameter of the object being cut is obtained by using conjugate cutting edge (PT) and anvil (Pe) profiles arranged whereby the angle (alpha) subtended by the intersect tangents is constant. The angle may be between 15 and 30 degrees, lies between 20 and 30 degrees for preference, and is ideally 25 degrees. The cutting edge profile may be a compound curve with two lengths of different radii whilst the anvil profile is compounded of four curves. The first three anvil curves have progressively increasing radii whilst the last has a reduced radius. A specially designed machine is used to sharpen the tool.
Patent FR-2523483-A1 (FR)
IPC: B21D5/04
Filed: 1982-03-19
Abstract: A sheet-metal bending brake has a stationary anvil having a flat and horizontal support surface bounded by and having a straight stationary bending edge and a cut-out back surface forming an acute angle with the support surface. A bending assembly displaceable perpendicular to and adjacent the anvil carries a movable bending blade having a movable bending edge parallel to the stationary edge and spaced therefrom in a direction parallel to the support surface and a clamp bar above the support surface adjacent the blade and having a clamp-bar face confronting and parallel to the support surface. This bar is supported on the bending assembly for limited vertical movement relative thereto between a lower position with the bar face below the movable edge and an upper position with the bar face above the movable edge and is normally spring-biased into the lower position. The assembly can be moved between an upper position with the bar face and the movable edge both above the support surface and a workpiece thereon and a lower position with the bar face pressing the workpiece against the support surface and the movable edge below the stationary edge and through an intermediate position with the bar face and the movable edge level with each other and both engaging the workpiece. Thus the bar clamps the workpiece to the anvil and movement from the intermediate position to the lower position of the blade bends over the workpiece edge region. When moving from the intermediate to the lower position the blade is pivoted forward to further bend the workpiece.