FR2928626A1 - Sealed capping device for packaging food products in plastic tray, has back plate supported against free edge of upper cover in separated and soldering positions of head such that back plate is intercalated between upper and lower covers - Google Patents

Sealed capping device for packaging food products in plastic tray, has back plate supported against free edge of upper cover in separated and soldering positions of head such that back plate is intercalated between upper and lower covers Download PDF

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Publication number
FR2928626A1
FR2928626A1 FR0801315A FR0801315A FR2928626A1 FR 2928626 A1 FR2928626 A1 FR 2928626A1 FR 0801315 A FR0801315 A FR 0801315A FR 0801315 A FR0801315 A FR 0801315A FR 2928626 A1 FR2928626 A1 FR 2928626A1
Authority
FR
France
Prior art keywords
plate
bell
film
welding
lower bell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0801315A
Other languages
French (fr)
Other versions
FR2928626B1 (en
Inventor
Michel Jegouzo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guelt Industries SA
Original Assignee
Guelt Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guelt Industries SA filed Critical Guelt Industries SA
Priority to FR0801315A priority Critical patent/FR2928626B1/en
Publication of FR2928626A1 publication Critical patent/FR2928626A1/en
Application granted granted Critical
Publication of FR2928626B1 publication Critical patent/FR2928626B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • B65B31/046—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00141—Protective gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00145—Vacuum, e.g. partial vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7422—Aluminium or alloys of aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/746—Joining plastics material to non-plastics material to inorganic materials not provided for in groups B29C66/742 - B29C66/744
    • B29C66/7461—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/746—Joining plastics material to non-plastics material to inorganic materials not provided for in groups B29C66/742 - B29C66/744
    • B29C66/7465—Glass

Abstract

The device has an enclosure with upper and lower covers (1, 2) that are vertically displaced by a pneumatic jack between open and closed positions. A support plate (6) and a soldering head (7) are respectively mounted in a detachable manner on the lower cover to support a container and on the upper cover. A back plate (76) is supported against a free edge (13) of the upper cover in separated and soldering positions of the head such that the back plate is intercalated between the upper cover and the lower cover that is provided with the support unit in the closed position of the covers.

Description

La présente invention concerne un dispositif d'operculage étanche de contenants, notamment de barquettes plastiques, permettant de sceller par soudure thermique un film sur un rebord d'operculage desdits contenants, en vue notamment de l'emballage sous vide ou sous atmosphère modifiée de produits alimentaires. Il est connu des dispositifs d'operculage comprenant une enceinte comportant d'une cloche supérieure et une cloche inférieure aptes à être déplacées verticalement l'une par rapport à l'autre par des premiers moyens de déplacement entre une position ouverte et une position io fermée, des moyens de support montés de manière amovible sur la cloche inférieure, aptes à supporter un ou plusieurs contenants par leur rebord, et une tête de soudure montée mobile verticalement dans la cloche supérieure, de manière au moins partiellement amovible. La tête de soudure comprend un bloc de chauffe, et une semelle montée sur ledit 15 bloc de chauffe, portant une ou plusieurs plaques de soudure, une lame de coupe associée à chaque plaque de soudure, et un dévétisseur ou contre-plaque munie d'une ouverture pour le passage de chaque plaque de soudure associée à une lame, ladite contre-plaque étant montée mobile verticalement sur ladite semelle. Le dispositif comprend en 20 outre des seconds moyens de déplacement aptes à déplacer verticalement la tête de soudure entre une position rétractée et une position active dans laquelle chaque plaque de soudure vient souder le film sur le rebord d'un contenant et la lame associée découpe le film autour du rebord lorsque les cloches supérieure et inférieure sont en 25 position fermée. Chaque cloche peut être connectée à une pompe à vide pour réaliser un operculage sous vide, un gaz inerte pouvant en outre être injecté via la cloche inférieure juste avant l'opération de soudure pour réaliser un operculage sous atmosphère modifiée. La tête de soudure équipée de sa contre-plaque, est entièrement 30 encastrée dans la cloche supérieure. L'étanchéité entre les cloches en position fermée est assurée par le bord libre de la cloche supérieure venant en appui contre le bord libre de la cloche inférieure ou contre les moyens de support de contenants. Le dévétisseur est sollicité par des moyens élastiques, tels que des ressorts, vers une position de repos dans laquelle les plaques de soudure et les lames sont en retrait. Lorsque la tête est déplacée vers sa position active, le dévétisseur vient en appui contre le film, puis les plaques de soudure et les lames viennent en saillie au-delà du dévétisseur pour souder et couper le film. Lorsque la tête de soudure est ramenée en position rétractée, le dévétisseur retourne élastiquement vers sa position de repos. Le dévétisseur assure ainsi une bonne découpe par maintien du film sur les moyens de support, et évite au film de s'accrocher aux lames après la découpe. io Les moyens de support et la tête de soudure ont des formes complémentaires et sont adaptés au format des contenants à operculer. Différents jeux interchangeables de moyens de support et de têtes de soudure peuvent être montés sur les cloches en fonction du format des contenants à operculer. Ladite tête de soudure peut être montée 15 déplaçable verticalement dans la cloche supérieure par son bloc de chauffe, et la semelle est montée de manière amovible sur ledit bloc de chauffe. Ce type de tête de soudure encastrée permet d'adapter rapidement le dispositif d'operculage à un format de contenants, sans changer la 20 cloche supérieure de la machine, ni les seconds moyens de déplacement de la tête de soudure, ni le bloc de chauffe, et sans effectuer de raccordement de fluides. Toutefois, après utilisation, la tête de soudure encastrée dans la cloche est très chaude, tous les éléments la constituant, notamment le dévétisseur et la semelle, sont en contact avec la chaleur. 25 La manipulation de la partie interchangeable de la tête de soudure est délicate, et il est nécessaire de porter des gants haute température, généralement peu compatibles avec les normes d'hygiène des salles de conditionnement. Par ailleurs, le dévétisseur est assemblé à la semelle au moyen de 30 ressorts à faible force de rappel pour assurer un bon contrôle de la pression de soudure via les seconds moyens de déplacement de la tête de soudure. Cette faible force de rappel ne garantit pas une découpe fiable dans le temps, notamment en cas d'usure des lames et/ou des ressorts. The present invention relates to a sealed sealing device containers, including plastic trays, for sealing by thermal welding a film on a lidding edge of said containers, in particular for vacuum packaging or modified atmosphere products food. Lidding devices are known comprising an enclosure comprising an upper bell and a lower bell able to be moved vertically relative to each other by first displacement means between an open position and a closed position. , support means removably mounted on the lower bell, adapted to support one or more containers by their rim, and a welding head mounted vertically in the upper bell, at least partially removable manner. The welding head comprises a heating block, and a soleplate mounted on said heating block, carrying one or more solder plates, a cutting blade associated with each solder plate, and a stripper or counter plate provided with an opening for the passage of each weld plate associated with a blade, said counterplate being mounted vertically movable on said soleplate. The device further comprises second displacement means able to move the soldering head vertically between a retracted position and an active position in which each solder plate welds the film on the rim of a container and the associated blade cuts the around the rim when the upper and lower bells are in the closed position. Each bell can be connected to a vacuum pump to achieve vacuum sealing, an inert gas can be further injected via the lower bell just before the welding operation to achieve lidding under modified atmosphere. The weld head equipped with its counter plate, is fully recessed in the upper bell. The tightness between the bells in the closed position is provided by the free edge of the upper bell bearing against the free edge of the lower bell or against the container support means. The stripper is biased by elastic means, such as springs, to a rest position in which the welding plates and the blades are recessed. When the head is moved to its active position, the stripper abuts against the film, then the welding plates and the blades protrude beyond the stripper to weld and cut the film. When the welding head is returned to the retracted position, the stripper returns elastically to its rest position. The stripper thus ensures good cutting by holding the film on the support means, and prevents the film from clinging to the blades after cutting. The support means and the welding head have complementary shapes and are adapted to the format of the containers to be sealed. Different interchangeable sets of support means and welding heads can be mounted on the bells depending on the size of the containers to be sealed. Said welding head can be mounted vertically movable in the upper bell by its heating block, and the soleplate is removably mounted on said heating block. This type of built-in welding head makes it possible to quickly adapt the sealing device to a format of containers, without changing the upper bell of the machine, nor the second means for moving the welding head, nor the heating block. , and without connecting fluids. However, after use, the welding head embedded in the bell is very hot, all the elements constituting it, including the stripper and the sole, are in contact with the heat. The handling of the interchangeable portion of the solder head is delicate, and it is necessary to wear high temperature gloves, generally not compatible with the hygiene standards of the packing rooms. Furthermore, the stripper is assembled to the sole by means of 30 low-return force to ensure good control of the welding pressure via the second means of movement of the welding head. This low restoring force does not guarantee a reliable cutting over time, especially in case of wear of the blades and / or springs.

Le but de la présente invention est de proposer un dispositif d'operculage palliant au moins l'un des inconvénients précités, qui puisse être adapté rapidement et facilement à divers formats de contenants à operculer, tout en limitant notamment les risques de brûlures et/ou en garantissant un bon maintien du film. A cet effet, la présente invention a pour objet un dispositif d'operculage étanche sous film de contenants, par exemple de type barquette plastique, par thermo-soudage d'un film sur un rebord d'operculage desdits contenants, en vue notamment de l'emballage sous io vide ou sous atmosphère modifiée de produits alimentaires, lequel dispositif comprenant - une enceinte comportant une cloche supérieure et une cloche inférieure aptes à être déplacées verticalement l'une par rapport à l'autre par des premiers moyens de déplacement entre une position ouverte pour le 15 passage d'un film et une position fermée, - des moyens de support montés de manière amovible sur la cloche inférieure, aptes à supporter un ou plusieurs contenants par leur rebord, - une tête de soudure montée mobile verticalement, dans la cloche supérieure de manière au moins partiellement amovible comprenant 20 - un bloc de chauffe, - une semelle, montée sur ledit bloc de chauffe, et portant - une ou plusieurs plaques de soudure, comprenant chacune un bord de soudure annulaire conformé pour venir s'appliquer sur le rebord d'operculage d'un contenant, 25 - une lame de coupe associée à chaque plaque de soudure, formant une boucle fermée autour du bord de soudure annulaire, et - une contre-plaque munie d'une ouverture pour le passage de chaque plaque de soudure associée à une lame, ladite contre-plaque étant montée mobile verticalement sur ladite semelle, et 30 - des seconds moyens de déplacement aptes à déplacer verticalement la tête de soudure entre une position rétractée et une position de soudure dans laquelle, lorsque les cloches supérieure et inférieure sont en position fermée, chaque plaque de soudure vient souder le film sur le rebord d'operculage d'un contenant et la lame associée découpe le film autour dudit rebord, caractérisé en ce que la contre-plaque est en appui par sa face supérieure contre le bord libre de la cloche supérieure, dans la position écartée et la position de soudure de la tête de soudure, de sorte que ladite contre-plaque soit intercalée entre la cloche supérieure et la cloche inférieure équipée des moyens de support dans la position fermée des deux cloches. Selon l'invention, la contre-plaque de la tête de soudure est en io dehors de la cloche supérieure lorsque la tête de soudure est montée sur cette dernière. La contre-plaque vient contre le bord libre de la cloche supérieure, qui est une partie froide du dispositif. Ainsi la contre-plaque reste froide ou légèrement tiède du fait de son contact avec la cloche. Pour le changement de format, l'opérateur peut ainsi manipuler 15 la tête de soudure ou une partie interchangeable de celle-ci par la contre-plaque, sans gants, avec des risques de brûlures limités. Le dispositif selon l'invention permet d'effectuer un changement de format dans de bonnes conditions de sécurité pour l'opérateur effectuant le changement de format. 20 Selon une particularité, ladite tête de soudure est montée déplaçable verticalement dans la cloche supérieure par son bloc de chauffe, la semelle étant montée de manière amovible sur ledit bloc de chauffe. Pour le changement de format, seule la partie dite interchangeable de la tête de soudure comprenant la semelle portant les 25 plaques de soudure, les lames et la contre-plaque doit être changée. Selon un mode de réalisation, ledit bloc de chauffe est relié à la cloche supérieure par lesdits seconds moyens de déplacement, le montage de la semelle sur le bloc de chauffe étant réalisé par des vis montées sur ledit bloc de chauffe et dont les têtes sont aptes à coopérer 30 avec les extrémités de tiges traversant la paroi de fond de la cloche supérieure. Selon une particularité, ladite contre-plaque montée mobile sur la semelle est sollicitée par des moyens de rappel élastique vers une position de repos dans laquelle la ou les plaques de soudure et la ou les lames de coupe associées sont en retrait par rapport à la face inférieure de ladite contre-plaque. La contre-plaque prise en sandwich entre la cloche supérieure et la cloche inférieure dans la position fermée des cloches garantit le maintien du film. Les moyens de rappel, tels que des ressorts, servent uniquement au maintien de la contre-plaque en position de repos lors du changement de format pour limiter les risques de brûlures et/ou de coupures. Selon un mode de réalisation, au moins l'un des éléments parmi io la contre-plaque et la cloche supérieure, de préférence la cloche supérieure, comprend un joint d'étanchéité garantissant l'étanchéité au niveau de la zone de contact entre ces deux éléments. Selon un mode de réalisation, les moyens de support comprennent une plaque support munie d'une ou plusieurs ouvertures 15 pour la réception de contenants et montée de manière amovible sur le bord libre de la cloche inférieure, au moins l'un des éléments parmi la contre-plaque et la plaque support, de préférence la contre-plaque, comprenant un joint d'étanchéité garantissant l'étanchéité entre la contre-plaque et la cloche inférieure et le maintien du film, ledit joint 20 d'étanchéité formant au moins une boucle fermée autour de l'ensemble des ouvertures de la plaque support et des ouvertures de la contre-plaque, et de préférence entourant chaque ouverture de la plaque support et chaque ouverture de la contre-plaque pour un meilleur maintien du film, et donc une bonne soudure et une bonne découpe du 25 film. Selon un mode de réalisation, le dispositif comprend un châssis sur lequel la cloche inférieure est montée coulissante horizontalement entre une position de chargement et une position dans laquelle la cloche inférieure est en-dessous de la cloche supérieure, lesdits premiers 30 moyens de déplacement étant aptes à déplacer verticalement ladite cloche inférieure. L'enceinte inférieure peut être utilisée pour le changement de la partie interchangeable de la tête de soudure après retrait de la plaque support. Le dispositif est par exemple de type semi- automatique, les contenants étant chargés manuellement sur la plaque support dans la position de chargement de la cloche inférieure. Avantageusement, la cloche inférieure est munie de plots latéraux aptes à venir s'insérer dans des rainures latérales extérieures de la plaque support, et/ou dans des perçages de la contre-plaque. Selon une particularité, la contre-plaque est de dimensions extérieures supérieures à celles des cloches, et présente au moins une portion s'étendant au-delà des parois latérales des cloches pour faciliter le retrait de la partie interchangeable et sa manipulation ultérieure. io Selon une particularité, la contre-plaque présente une portion avant s'étendant au-delà des parois latérales avant des cloches, ladite portion avant présentant un bord de guidage de forme générale concave pour tendre vers les extérieurs le film en sortie d'enceinte. L'invention sera mieux comprise, et d'autres buts, détails, is caractéristiques et avantages apparaîtront plus clairement au cours de la description explicative détaillée qui va suivre d'un mode de réalisation particulier actuellement préféré de l'invention, en référence aux dessins schématiques annexés, sur lesquels : - la figure 1 est une vue schématique en perspective d'un dispositif 20 d'operculage selon l'invention, la cloche inférieure équipée d'une plaque support de contenants en position de chargement de barquettes, la cloche supérieure en position relevée ; -la figure 2 est une vue en coupe longitudinale du dispositif de la figure 1, les cloches supérieure et inférieure en position ouverte avant 25 l'opération de soudure, la tête de soudure en position rétractée ; - la figure 3 est une vue analogue à celle de la figure 2, illustrant l'opération de soudure, les cloches supérieure et inférieure en position fermée, et la tête de soudure en position de soudure ; - la figure 4 est une vue partielle agrandie de la figure 3 ; et, 30 - les figures 5 et 6 sont des vues analogues à celles de la figure 2, illustrant des étapes lors du changement de la partie interchangeable de la tête de soudure. The purpose of the present invention is to provide a sealing device overcoming at least one of the aforementioned drawbacks, which can be adapted quickly and easily to various sizes of containers to be sealed, while limiting in particular the risk of burns and / or ensuring a good maintenance of the film. For this purpose, the subject of the present invention is a device for tight sealing under a film of containers, for example of the plastic container type, by thermo-welding a film on a lidding rim of said containers, particularly in view of the vacuum or modified atmosphere packaging of food products, which device comprises an enclosure comprising an upper bell and a lower bell able to be displaced vertically relative to each other by first displacement means between a position open for the passage of a film and a closed position, - support means removably mounted on the lower bell, adapted to support one or more containers by their rim, - a vertically movable welding head, in the at least partially removable upper bell comprising 20 - a heating block, - a soleplate, mounted on said heating block, and carrying - one or more weld plates, each comprising an annular weld edge shaped to be applied to the sealing lip of a container, a cutting blade associated with each weld plate, forming a closed loop around the edge of the annular weld, and - a counterplate provided with an opening for the passage of each weld plate associated with a blade, said counterplate being mounted vertically movable on said soleplate, and second displacement means able to move vertically the welding head between a retracted position and a weld position in which, when the upper and lower bells are in the closed position, each weld plate welds the film on the sealing lip of a container and the associated blade cut the film around said flange, characterized in that the counter plate is supported by its upper face against the free edge of the upper bell, in the eca position. and the welding position of the welding head, so that said counterplate is interposed between the upper bell and the lower bell equipped with support means in the closed position of the two bells. According to the invention, the counter plate of the welding head is outside the upper bell when the welding head is mounted on the latter. The counter-plate comes against the free edge of the upper bell, which is a cold part of the device. Thus the counter plate remains cold or slightly warm because of its contact with the bell. For the change of format, the operator can thus manipulate the welding head or an interchangeable portion thereof by the backplate, without gloves, with limited risk of burns. The device according to the invention makes it possible to change the format in good security conditions for the operator performing the format change. According to one feature, said welding head is mounted vertically movable in the upper bell by its heating block, the soleplate being removably mounted on said heating block. For the change of format, only the so-called interchangeable portion of the solder head comprising the sole plate carrying the welding plates, the blades and the backplate must be changed. According to one embodiment, said heating block is connected to the upper bell by said second moving means, the mounting of the soleplate on the heating block being formed by screws mounted on said heating block and whose heads are suitable to cooperate with the ends of rods passing through the bottom wall of the upper bell. According to a feature, said counter-plate mounted on the sole is biased by elastic return means to a rest position in which the weld plate or plates and the associated cutting blade or blades are set back from the face bottom of said counterplate. The counter plate sandwiched between the upper bell and the lower bell in the closed position of the bells ensures the maintenance of the film. The return means, such as springs, serve only to maintain the plate against the rest position during the change of format to limit the risk of burns and / or cuts. According to one embodiment, at least one of the counter-plate and the upper bell, preferably the upper bell, comprises a seal ensuring sealing at the contact zone between these two. elements. According to one embodiment, the support means comprise a support plate provided with one or more openings 15 for receiving containers and removably mounted on the free edge of the lower bell, at least one of the elements against the plate and the support plate, preferably against the plate, comprising a seal ensuring sealing between the plate against the lower bell and the maintenance of the film, said seal forming at least one closed loop around all the openings of the support plate and the openings of the counter-plate, and preferably surrounding each opening of the support plate and each opening of the against-plate for better maintenance of the film, and therefore a good welding and good cutting of the film. According to one embodiment, the device comprises a frame on which the lower bell is slidably mounted horizontally between a loading position and a position in which the lower bell is below the upper bell, said first 30 displacement means being capable of to move vertically said lower bell. The lower enclosure can be used for changing the interchangeable portion of the welding head after removal of the support plate. The device is for example semi-automatic type, the containers being loaded manually on the support plate in the loading position of the lower bell. Advantageously, the lower bell is provided with lateral studs adapted to be inserted into external lateral grooves of the support plate, and / or in holes of the counterplate. According to one feature, the counter-plate is of external dimensions greater than those of the bells, and has at least one portion extending beyond the side walls of the bells to facilitate removal of the interchangeable portion and its subsequent handling. According to one particular feature, the backplate has a front portion extending beyond the front side walls of the bells, said front portion having a generally concave guiding edge for tending the outside of the enclosure output film. . The invention will be better understood, and other objects, details, features and advantages will become more clearly apparent from the following detailed explanatory description of a particular presently preferred embodiment of the invention, with reference to the drawings. attached schematic, in which: - Figure 1 is a schematic perspective view of a sealing device 20 according to the invention, the lower bell equipped with a container support plate in the trays loading position, the upper bell in raised position; FIG 2 is a longitudinal sectional view of the device of Figure 1, the upper and lower bells in the open position before the welding operation, the welding head in the retracted position; - Figure 3 is a view similar to that of Figure 2, illustrating the welding operation, the upper and lower bells in the closed position, and the welding head in the welding position; FIG. 4 is an enlarged partial view of FIG. 3; and, Figures 5 and 6 are views similar to those of Figure 2, illustrating steps in changing the interchangeable portion of the solder head.

Le dispositif d'operculage représenté sur ces figures est de type semi-automatique et est destiné à l'emballage sous vide ou sous atmosphère modifiée de produits alimentaires contenus dans des barquettes 9 en plastique, l'operculage étant réalisé au moyen d'un film plastique 5. Le dispositif d'operculage selon l'invention peut également être de type automatique, et être utilisé pour l'operculage de divers contenants, notamment des contenants en aluminium, verre ou céramique par exemple. En référence aux figures 1 à 4, le dispositif comprend une enceinte io E, dite à vide, formée d'une cloche supérieure 1 et d'une cloche inférieure 2 montées mobiles sur un châssis 3 entre une position ouverte illustrée à la figure 2, et une position fermée illustrée aux figures 3 et 4. Dans le présent mode de réalisation, la cloche supérieure est montée pivotante autour d'un axe A pour pouvoir être relevée tel qu'illustrée à la 15 figure 1, et est maintenue fixe horizontalement lors des opérations de soudure tel qu'illustré aux figures 2 à 4. La cloche inférieure est montée coulissante horizontalement sur des glissières 31, à la manière d'un tiroir, entre une position de chargement illustrée à la figure 1 et une position illustrée aux figures 2 et 3 dans laquelle la cloche inférieure 2 20 est située en dessous de la cloche supérieure, dans ladite position ouverte des deux cloches. Avantageusement, le déplacement en translation horizontale de la cloche inférieure est réalisé automatiquement par un vérin 32. Lorsque la cloche inférieure est en dessous de la cloche inférieure, des premiers moyens de déplacement, tel qu'un vérin 25 pneumatique 4, sont aptes à déplacer verticalement la cloche inférieure en translation verticale pour amener les cloches en position ouverte et en position fermée. Le film plastique 5 qui va servir à l'operculage passe entre les deux cloches. Le film provient d'une bobine 51 et est engagé sur des rouleaux de guidage 52. Le squelette sortant de l'enceinte E est 30 récupéré sur une seconde bobine 53 entraînée positivement en rotation par un moteur 54, en passant par un rouleau de guidage 55. En référence en particulier à la figure 4, la cloche inférieure 2 est équipée de moyens de support aptes à supporter une ou plusieurs barquettes par leur rebord 91. Ces moyens de support sont formés d'une lunette ou plaque support 6, posée sur le bord supérieur libre 21 de la cloche inférieure, et munie d'ouvertures 61 traversantes, au nombre de quatre dans le présent mode de réalisation, dont la forme correspond à la forme des barquettes à operculer. La paroi latérale 62 définissant chaque ouverture présente un épaulement 63 servant de surface support pour les rebords des barquettes, cet épaulement étant muni d'une rainure annulaire 64 pour la réception des lames de coupe tel que décrit ci-après. La plaque support 6 repose par sa face inférieure sur le bord supérieur 21 lo de la cloche, ce dernier étant muni d'un joint d'étanchéité 22. Suivant la figure 1, le maintien de la plaque support 6 sur la cloche inférieure est assuré par des plots latéraux 23 solidaires de la cloche inférieure, venant s'insérer partiellement dans des rainures latérales extérieures 65 de la plaque support, ces plots associés aux rainures faisant également office 15 de détrompeur. Avantageusement, l'enceinte est équipée d'un ou plusieurs plateaux éjecteurs (non représentés) permettant de soulever les barquettes hors des ouvertures après l'operculage afin de faciliter leur retrait. La cloche supérieure 1 est équipée d'une tête de soudure 7 montée 20 mobile verticalement par l'intermédiaire de seconds moyens de déplacement 8. La tête de soudure comprend un bloc de chauffe 71 formé d'une plaque équipée de résistances, ainsi que d'une sonde. Ce bloc de chauffe est relié à la cloche supérieure par lesdits seconds moyens de déplacement. Ces moyens de déplacement sont formés d'un 25 vérin 8, dit de soudure, par exemple pneumatique, comprenant un piston 81 monté coulissant dans une chambre 82 formée en partie supérieure de la cloche supérieure, et dont la tige 83 traverse de manière étanche la paroi de fond 11. Le bloc de chauffe est fixé par l'intermédiaire d'une plaque isolante 72 à l'extrémité libre de la tige. Le vérin de soudure 30 permet de déplacer la tête de soudure d'une position dite rétractée dans laquelle son piston est en haut de la chambre, tel qu'illustré à la figure 2, vers une position de soudure illustrée notamment à la figure 4 et décrite ci-après. La tête de soudure comprend une partie interchangeable 7A (figures 5 et 6) comprenant une semelle 73, sur la face principale inférieure de laquelle sont montées plusieurs plaques de soudure 74, au nombre de quatre dans le présent mode de réalisation, de forme complémentaire de celle des ouvertures 61. Chaque plaque de soudure comprend un bord de soudure annulaire 741, le centre de la plaque soudure étant équipé d'une plaque isolante 742. Une lame de coupe 75 est associée à chaque plaque de soudure, et forme une boucle fermée autour du bord de soudure annulaire, le tranchant de la lame étant disposé au-delà du bord de soudure annulaire. Une lame de coupe est io par exemple montée directement sur le bord latéral de chaque plaque de soudure. Une contre-plaque 76 munie d'une ouverture 761 (Figure 1) pour le passage de chaque plaque de soudure associée à une lame, est montée mobile verticalement sur la semelle 73 par l'intermédiaire de tiges 77 solidaires de la contre-plaque, passant dans des perçages de la 15 semelle, et munie en extrémité de butée 77a. La semelle est montée à plat par sa face principale supérieure contre le bloc de chauffe, de manière amovible, de sorte que lorsque la tête est en position rétractée, la contre-plaque 76, de dimensions extérieures supérieures à celles de la semelle, vient par sa face supérieure contre le bord libre 13 de la 20 paroi latérale 12 de la cloche supérieure, la semelle contre les butées par sa face principale supérieure. La cloche supérieure et la contre-plaque viennent avantageusement s'appliquer l'une contre l'autre par l'intermédiaire d'un joint d'étanchéité 14 monté dans une rainure du bord libre 13. Le montage de la semelle sur le bloc de chauffe est 25 réalisé par des vis (non visibles) montées sur le bloc de chauffe, et dont les têtes sont aptes à coopérer avec les extrémités de tiges 15 qui traversent la paroi de fond 11 et qui sont équipées de molettes pour le vissage/dévissage manuel desdites vis. La contre-plaque est munie sur sa face inférieure d'un joint d'étanchéité 762 entourant chaque 30 ouverture 761. La cloche supérieure et la cloche inférieure sont chacune équipées, de manière connue en soi, de moyens de connexion à une pompe à vide pour leur mise sous vide. La cloche inférieure comprend Io en outre des moyens de connexion à une source de gaz à injecter, en particulier de gaz inerte, pour l'injection dans les barquettes de gaz, en particulier de gaz inerte, après mise sous vide et avant operculage. La description d'un cycle d'operculage va à présent être effectuée en référence aux figures 1 à 4. La cloche inférieure 2, équipée d'une plaque support 6 est en position de chargement tel qu'illustrée à la figure 1, la cloche supérieure est maintenue fixe horizontalement sur le châssis, avec sa tête de soudure en position rétractée. Le film passe entre les deux Io cloches. Une fois les barquettes 9 à operculer chargées dans les ouvertures 61 de la plaque support, un cycle de soudure est lancé, par exemple en actionnant un bouton mode soudure du dispositif. Dans une première étape, la cloche inférieure est amenée par le vérin 32 en dessous de la cloche supérieure, dans la position ouverte des deux 15 cloches, tel qu'illustré à la figure 2. Une portion neuve de film 5 est amenée entre les deux cloches par entraînement de la bobine 53. Le vérin 4 actionne ensuite la cloche inférieure pour la soulever jusqu'à la position de fermeture des deux cloches. Dans cette position la contre- plaque est prise en sandwich entre le bord libre 13 de la cloche 20 supérieure et la plaque support 6. Le joint 762 assure un bon maintien du film autour des ouvertures. Ledit joint 762 permet, avec le joint 22, d'assurer une bonne étanchéité de la cloche inférieure, pour une éventuelle mise sous vide suivie d'une éventuelle injection de gaz inerte dans la barquette. Ce joint 762 permet en outre, avec le joint 14, 25 d'assurer une bonne étanchéité de la cloche supérieure pour une éventuellement mise sous vide de cette dernière, simultanément à la mise sous vide de la cloche inférieure, pour éviter une déformation du film. Ensuite, le vérin de soudure 8 actionne la tête de soudure pour l'amener dans la position de soudure illustrée aux figures 3 et 4, dans 30 laquelle le bord annulaire 741 de chaque plaque de soudure vient souder le film 5 sur le rebord 91 d'une barquette 9, et la lame 75 associée découpe le film autour dudit rebord 91. Dans cette position, les lames viennent se loger dans les rainures 64. Le vérin de soudure 8 est ensuite commandé pour ramener la tête en position écartée, les cloches sont ensuite ramenées en position ouverte par le vérin 4, et la cloche inférieure est ramenée en position de chargement par le vérin 32, pour le retrait des barquettes operculées, et le chargement d'autres barquettes à operculer. Différents jeux de plaques support et de parties interchangeables 7A de tête de soudure peuvent être montés sur les cloches en fonction du format des barquettes à operculer. Le remplacement de la partie interchangeable 7A de la tête de io soudure est réalisé au moyen de la cloche inférieure 2 de la manière suivante. Après retrait de la plaque support 6 de la cloche inférieure en position de chargement, et positionnement de celle-ci sur des étagères 33 prévues en partie inférieure du châssis, un cycle automatique de changement de format est lancé, par exemple en actionnant un bouton 15 mode changement de format . La cloche inférieure est amenée en dessous de la cloche supérieure par commande du vérin 32, les deux cloches étant en position ouverte, tel qu'illustrée à la figure 2. Le vérin 4 est ensuite commandé pour soulever la cloche inférieure. En l'absence de plaque 20 support 6, la contre-plaque 76 est positionnée à distance du bord supérieur 21 de la cloche inférieure. Les molettes sont alors desserrées manuellement pour dévisser les vis de montage et amener progressivement la partie interchangeable de la tête de soudure, sur la cloche inférieure, la contre-plaque contre le bord supérieur 21. Pour 25 garantir un positionnement correct de la partie interchangeable sur la cloche inférieure, la contre-plaque est munie de perçages 763 dans lesquels les plots 23 de la cloche inférieure viennent s'insérer. Des ressorts 78, représentés schématiquement sur les figures 4 à 6, sont placés entre la semelle 73 et la contre-plaque, par exemple autour 30 desdites tiges, pour écarter élastiquement la contre-plaque et la semelle l'une de l'autre, la contre-plaque dans une position dite de repos avec les bords annulaires et les lames en retrait par rapport à la face inférieure de la contre-plaque, et la semelle 73 contre les butées 77a. The sealing device shown in these figures is of the semi-automatic type and is intended for the vacuum or modified atmosphere packaging of food products contained in plastic trays 9, the lidding being carried out by means of a film 5. The sealing device according to the invention can also be automatic type, and be used for sealing various containers, including aluminum containers, glass or ceramic for example. With reference to FIGS. 1 to 4, the device comprises an enclosure 10, referred to as vacuum chamber, formed of an upper bell 1 and a lower bell 2 mounted movably on a chassis 3 between an open position illustrated in FIG. and in a closed position illustrated in FIGS. 3 and 4. In the present embodiment, the upper bell is pivotally mounted about an axis A in order to be raised as shown in FIG. 1, and is held fixed horizontally when welding operations as shown in Figures 2 to 4. The lower bell is slidably mounted horizontally on slides 31, in the manner of a drawer, between a loading position shown in Figure 1 and a position shown in FIGS. 2 and 3 wherein the lower bell 2 is located below the upper bell, in said open position of the two bells. Advantageously, the displacement in horizontal translation of the lower bell is carried out automatically by a jack 32. When the lower bell is below the lower bell, first displacement means, such as a pneumatic jack 4, are able to move vertically the lower bell in vertical translation to bring the bells in the open position and in the closed position. The plastic film 5 which will be used for the lidding passes between the two bells. The film comes from a spool 51 and is engaged on guide rollers 52. The skeleton exiting the enclosure E is recovered on a second spool 53 positively rotated by a motor 54, passing through a guide roller 55. With reference in particular to FIG. 4, the lower bell 2 is equipped with support means able to support one or more trays by their rim 91. These support means are formed of a bezel or support plate 6, placed on the upper free edge 21 of the lower bell, and provided with through openings 61, four in the present embodiment, whose shape corresponds to the shape of trays to seal. The side wall 62 defining each opening has a shoulder 63 serving as a support surface for the flanges of the trays, this shoulder being provided with an annular groove 64 for receiving the cutting blades as described below. The support plate 6 rests by its lower face on the upper edge 21 lo of the bell, the latter being provided with a seal 22. According to Figure 1, the holding of the support plate 6 on the lower bell is ensured by lateral studs 23 integral with the lower bell, being partially inserted into external lateral grooves 65 of the support plate, these studs associated with the grooves also acting as polarizer. Advantageously, the chamber is equipped with one or more ejector plates (not shown) for lifting the trays out of the openings after sealing to facilitate their removal. The upper bell 1 is equipped with a welding head 7 mounted vertically movable by means of second moving means 8. The welding head comprises a heating block 71 formed of a plate equipped with resistors, as well as a probe. This heating block is connected to the upper bell by said second moving means. These displacement means are formed of a cylinder 8, said welding, for example pneumatic, comprising a piston 81 slidably mounted in a chamber 82 formed in the upper part of the upper bell, and whose rod 83 passes through the seal bottom wall 11. The heating block is fixed by means of an insulating plate 72 at the free end of the rod. The welding cylinder 30 makes it possible to move the welding head from a so-called retracted position in which its piston is at the top of the chamber, as illustrated in FIG. 2, towards a welding position illustrated in particular in FIG. described below. The welding head comprises an interchangeable part 7A (FIGS. 5 and 6) comprising a sole 73, on the lower main face of which are mounted a plurality of solder plates 74, four in number in the present embodiment, of complementary shape to that of the openings 61. Each solder plate comprises an annular welding edge 741, the center of the solder plate being equipped with an insulating plate 742. A cutting blade 75 is associated with each solder plate, and forms a closed loop around the annular welding edge, the cutting edge of the blade being disposed beyond the annular welding edge. For example, a cutting blade is mounted directly on the side edge of each weld plate. A counterplate 76 provided with an opening 761 (FIG. 1) for the passage of each welding plate associated with a blade is mounted vertically on the soleplate 73 by means of rods 77 integral with the backplate, passing through holes in the sole, and provided end stop 77a. The soleplate is mounted flat by its upper main face against the heating block, removably, so that when the head is in the retracted position, against-plate 76, outer dimensions greater than those of the sole, comes through its upper face against the free edge 13 of the side wall 12 of the upper bell, the sole against the stops by its upper main face. The upper bell and the counter-plate are advantageously applied against each other by means of a seal 14 mounted in a groove of the free edge 13. The mounting of the sole on the block of heating is carried out by screws (not visible) mounted on the heating block, and whose heads are adapted to cooperate with the ends of rods 15 which pass through the bottom wall 11 and which are equipped with wheels for screwing / unscrewing manual said screws. The backplate is provided on its lower face with a seal 762 surrounding each opening 761. The upper bell and the lower bell are each equipped, in a manner known per se, with connection means to a vacuum pump. for their evacuation. The lower bell further comprises means for connection to a source of gas to be injected, in particular inert gas, for injection into the gas containers, in particular inert gas, after evacuation and before sealing. The description of a lidding cycle will now be made with reference to FIGS. 1 to 4. The bottom bell 2, equipped with a support plate 6, is in the loading position as illustrated in FIG. 1, the bell upper is held fixed horizontally on the frame, with its welding head in the retracted position. The film passes between the two Io bells. Once trays 9 to seal loaded into the openings 61 of the support plate, a welding cycle is launched, for example by actuating a button welding mode of the device. In a first step, the lower bell is brought by the jack 32 below the upper bell, in the open position of the two bells, as shown in Figure 2. A new portion of film 5 is brought between the two. bells by driving the spool 53. The cylinder 4 then actuates the lower bell to raise it to the closed position of the two bells. In this position the backplate is sandwiched between the free edge 13 of the upper bell 20 and the support plate 6. The seal 762 ensures a good hold of the film around the openings. Said seal 762 allows, with the seal 22, to ensure a good seal of the lower bell, for possible evacuation followed by a possible injection of inert gas into the tray. This seal 762 further allows, with the seal 14, 25 to ensure a good seal of the upper bell for a possible evacuation of the latter, simultaneously with the evacuation of the lower bell, to avoid deformation of the film . Then, the welding cylinder 8 actuates the welding head to bring it into the welding position illustrated in FIGS. 3 and 4, in which the annular edge 741 of each solder plate welds the film 5 on the flange 91. a tray 9, and the associated blade 75 cut the film around said flange 91. In this position, the blades are housed in the grooves 64. The welding cylinder 8 is then controlled to bring the head back into position, the bells are then returned to the open position by the cylinder 4, and the bottom bell is returned to the loading position by the cylinder 32, for the removal of trays trapped, and the loading of other trays to seal. Different sets of support plates and interchangeable parts 7A welding head can be mounted on the bells depending on the size of trays to seal. Replacement of the interchangeable portion 7A of the solder head is accomplished by means of the bottom bell 2 as follows. After removal of the support plate 6 from the lower bell in the loading position, and positioning thereof on shelves 33 provided in the lower part of the frame, an automatic change of format cycle is launched, for example by actuating a button 15 format change mode. The lower bell is brought below the upper bell by control cylinder 32, the two bells being in the open position, as shown in Figure 2. The cylinder 4 is then controlled to lift the lower bell. In the absence of a support plate 6, the counter-plate 76 is positioned at a distance from the upper edge 21 of the lower bell. The knobs are then loosened manually to unscrew the mounting screws and gradually bring the interchangeable portion of the welding head, on the lower bell, against the plate against the upper edge 21. To ensure proper positioning of the interchangeable portion on the lower bell, the counterplate is provided with holes 763 in which the studs 23 of the lower bell are inserted. Springs 78, shown diagrammatically in FIGS. 4 to 6, are placed between sole 73 and counter-plate, for example around 30 of said rods, to elastically separate the counter-plate and the sole from one another, against the plate in a so-called rest position with the annular edges and the blades recessed relative to the underside of the against-plate, and the sole 73 against the stops 77a.

Lorsque la partie interchangeable est posée sur la cloche inférieure, la force de rappel des ressorts est définie de sorte que la semelle soit contre les butées des tiges, la contre-plaque en position de repos. En variante, avant de desserrer les molettes, le vérin 8 est commandé pour descendre la tête de soudure en position de soudure. En l'absence de plaque support inférieure, la contre-plaque se décolle du bord libre 13, la semelle venant contre les butées. Une fois la partie interchangeable posée sur la cloche inférieure, le bouton changement de format est à nouveau actionné pour déclencher la remontée de la tête de soudure par le vérin de soudure 8 et la descente de la cloche inférieure par le vérin 4, tel qu'illustrée à la figure 5, puis la sortie de la cloche inférieure en position de chargement par le vérin 32. La partie interchangeable 7A peut alors être retirée manuellement de la cloche inférieure, tel qu'illustrée à la figure 6, et être remplacée par une nouvelle partie 1s interchangeable rangée dans les étagères et correspondant à un autre format de barquettes. La mise en place de cette nouvelle partie interchangeable sur la plaque de chauffe est réalisée au moyen de la cloche inférieure en effectuant dans l'ordre inverse les opérations précitées pour le retrait d'une partie interchangeable. 20 Pour faciliter la manipulation de la partie interchangeable, la contre-plaque 76 est avantageusement de dimensions extérieures supérieures à celles des cloches, et présente une portion avant 764 s'étendant au-delà des parois latérales avant 12a, 23a des cloches. Cette portion avant peut ainsi être aisément saisie pour le retrait de la partie 25 interchangeable et sa manipulation ultérieure. Avantageusement, cette portion avant présente un bord 765 servant de surface de guidage du squelette en sortie d'enceinte E, ce bord présentant une forme générale concave, avec une partie centrale droite se prolongeant par des parties d'extrémité inclinées, pour tendre 30 le squelette vers l'extérieur, afin d'éviter que le film se resserre vers son centre du fait des découpes, et garantir ainsi un bon déroulement du film de la bobine 51, sensiblement sans plis. Ce bord concave de la contre-plaque, de forme adaptée aux découpes réalisées, permet d'éviter l'utilisation classique en sortie d'enceinte d'un axe équipé de cônes pour tendre le film vers les extérieurs, les cônes devant être changés et/ou réglés à chaque format de barquettes, en fonction des découpes. When the interchangeable portion is placed on the lower bell, the restoring force of the springs is defined so that the sole is against the stops of the rods, against the plate in the rest position. Alternatively, before loosening the knobs, the cylinder 8 is controlled to lower the welding head in the welding position. In the absence of lower support plate, the counterplate is detached from the free edge 13, the sole coming against the stops. Once the interchangeable portion placed on the lower bell, the format change button is again actuated to trigger the rise of the welding head by the welding cylinder 8 and the lowering of the lower bell by the cylinder 4, such as illustrated in Figure 5, then the output of the lower bell in the loading position by the cylinder 32. The interchangeable portion 7A can then be removed manually from the lower bell, as shown in Figure 6, and be replaced by a new part 1s interchangeable row in the shelves and corresponding to another format of trays. The introduction of this new interchangeable part on the heating plate is performed by means of the lower bell by performing in the reverse order the above operations for the removal of an interchangeable part. In order to facilitate handling of the interchangeable portion, the counterplate 76 is advantageously of exterior dimensions greater than those of the bells, and has a front portion 764 extending beyond the front sidewalls 12a, 23a of the bells. This front portion can thus be easily grasped for the removal of the interchangeable portion and its subsequent handling. Advantageously, this front portion has an edge 765 serving as a guiding surface of the skeleton at the outlet of the enclosure E, this edge having a generally concave shape, with a central straight portion extending by inclined end portions, to tension the skeleton to the outside, to prevent the film is tightened towards its center because of the cuts, and thus ensure a smooth film of the coil 51, substantially without wrinkles. This concave edge of the counterplate, of a shape adapted to the cuts made, makes it possible to avoid the conventional use at the exit of the enclosure of an axis equipped with cones to stretch the film towards the outside, the cones to be changed and / or adjusted to each tray format, depending on the cutouts.

En variante, pour faciliter la manipulation des parties interchangeable, la contre-plaque présente des portions latérales qui dépassent de chaque côté de la cloche supérieure, et la contre-plaque présente avantageusement sur sa face supérieure, au niveau desdites portions latérales, des poignées de manipulation. In a variant, to facilitate handling of the interchangeable parts, the counterplate has lateral portions protruding from each side of the upper bell, and the counter-plate advantageously has on its upper face, at the level of said lateral portions, handles of handling.

Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. Although the invention has been described in connection with a particular embodiment, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

Claims (10)

REVENDICATIONS 1. Dispositif d'operculage étanche sous film de contenants, par exemple de type barquette plastique, par thermo-soudage d'un film sur un rebord d'operculage desdits contenants, en vue notamment de l'emballage sous vide ou sous atmosphère modifiée de produits alimentaires, lequel dispositif comprenant - une enceinte comportant une cloche supérieure et une cloche inférieure aptes à être déplacées verticalement l'une par rapport à l'autre par des premiers moyens de déplacement entre une position ouverte et une position fermée, - des moyens de support montés de manière amovible sur la cloche inférieure, aptes à supporter un ou plusieurs contenants par leur rebord, - une tête de soudure montée mobile verticalement, dans la cloche supérieure de manière au moins partiellement amovible comprenant un bloc de chauffe, une semelle, montée sur ledit bloc de chauffe, et portant une ou plusieurs plaques de soudure, une lame de coupe associée à chaque plaque de soudure, et une contre-plaque munie d'une ouverture pour le passage de chaque plaque de soudure associée à une lame, ladite contre-plaque étant montée mobile verticalement sur ladite semelle, et -des seconds moyens de déplacement aptes à déplacer verticalement la tête de soudure entre une position rétractée et une position de soudure dans laquelle chaque plaque de soudure vient souder le film sur le rebord d'operculage d'un contenant et la lame associée découpe le film autour dudit rebord, caractérisé en ce que la contre-plaque (76) est en appui par sa face supérieure contre le bord libre (13) de la cloche supérieure (1), dans la position écartée et la position de soudure de la tête de soudure, de sorte que ladite contre-plaque soit intercalée entre la cloche supérieure (1) et la cloche inférieure (2) équipée des moyens de support (6) dans la position fermée des deux cloches. 1. Apparatus for tight sealing under a film of containers, for example of the plastic container type, by thermo-welding a film on a sealing rim of said containers, in particular for packaging under vacuum or in a modified atmosphere of food products, which device comprises an enclosure comprising an upper bell and a lower bell able to be moved vertically relative to each other by first displacement means between an open position and a closed position; support mounted removably on the lower bell, adapted to support one or more containers by their rim, - a welding head mounted vertically movable, in the upper bell at least partially removable manner comprising a heating block, a sole, mounted on said heating block, and carrying one or more solder plates, a cutting blade associated with each weld plate, and a backplate provided with an opening for the passage of each weld plate associated with a blade, said counter plate being mounted vertically movable on said sole, and second displacement means able to vertically move the welding head between a retracted position and a weld position in which each solder plate welds the film on the sealing lip of a container and the associated blade cuts the film around said flange, characterized in that the counterplate (76) is supported by its upper face against the free edge (13) of the upper bell (1), in the spaced position and the welding position of the welding head, so that said counterplate is interposed between the upper bell ( 1) and the lower bell (2) equipped with support means (6) in the closed position of the two bells. 2. Dispositif selon la revendication 1, caractérisé en ce que ladite tête de soudure (7) est montée déplaçable verticalement dans la cloche supérieure (1) par son bloc de chauffe (71), la semelle (73) étant montée de manière amovible sur ledit bloc de chauffe. 2. Device according to claim 1, characterized in that said welding head (7) is mounted vertically movable in the upper bell (1) by its heating block (71), the sole (73) being removably mounted on said heating block. 3. Dispositif selon la revendication 2, caractérisé en ce que ledit bloc de chauffe (71) est relié à la cloche supérieure (1) par lesdits seconds moyens de déplacement, le montage de la semelle (73) sur le bloc de chauffe étant réalisé par des vis montées sur ledit bloc de chauffe et dont les têtes sont aptes à coopérer avec les extrémités de io tiges traversant la paroi de fond (11) de la cloche supérieure (1). 3. Device according to claim 2, characterized in that said heating block (71) is connected to the upper bell (1) by said second moving means, the mounting of the sole (73) on the heating block being realized by screws mounted on said heating block and whose heads are adapted to cooperate with the ends of rods passing through the bottom wall (11) of the upper bell (1). 4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que ladite contre-plaque (76) montée mobile sur la semelle (73) est sollicitée par des moyens de rappel élastique (78) vers une position de repos dans laquelle la ou les plaques de soudure et la ou les lames de is coupe associées sont en retrait par rapport à la face inférieure de ladite contre-plaque. 4. Device according to one of claims 1 to 3, characterized in that said counterplate (76) mounted movably on the sole (73) is biased by elastic return means (78) to a rest position in which the welding plate (s) and the associated cutting blade (s) are recessed with respect to the underside of the counterplate. 5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'au moins l'un des éléments parmi la contre-plaque (76) et la cloche supérieure (1) comprend un joint d'étanchéité (14) garantissant 20 l'étanchéité au niveau de la zone de contact entre ces deux éléments. 5. Device according to one of claims 1 to 4, characterized in that at least one of the against-plate member (76) and the upper bell (1) comprises a seal (14) guaranteeing The seal at the contact zone between these two elements. 6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de support comprennent une plaque support (6) munie d'une ou plusieurs ouvertures (61) pour la réception de contenants (9) et montée de manière amovible sur le bord libre (21) de 25 la cloche inférieure (2), au moins l'un des éléments parmi la contre-plaque (76) et la plaque support (6) comprenant un joint d'étanchéité (762) garantissant l'étanchéité entre la contre-plaque et la cloche inférieure et le maintien du film, ledit joint d'étanchéité formant au moins une boucle fermée autour de l'ensemble des ouvertures (61) de 30 la plaque support et des ouvertures (761) de la contre-plaque. 6. Device according to one of claims 1 to 5, characterized in that the support means comprise a support plate (6) provided with one or more openings (61) for receiving containers (9) and mounted so removable on the free edge (21) of the lower bell (2), at least one of the counter plate (76) and the support plate (6) comprising a seal (762) ensuring sealing between the counterplate and the lower bell and holding the film, said seal forming at least one closed loop around all the openings (61) of the support plate and the openings (761) of the counter plate. 7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'il comprend un châssis (3) sur lequel la cloche inférieure (2) est montée coulissante horizontalement entre une position de chargement etune position dans laquelle la cloche inférieure est en-dessous de la cloche supérieure (1), lesdits premiers moyens de déplacement (4) étant aptes à déplacer verticalement ladite cloche inférieure. 7. Device according to one of claims 1 to 6, characterized in that it comprises a frame (3) on which the lower bell (2) is slidably mounted horizontally between a loading position and a position in which the lower bell is below the upper bell (1), said first moving means (4) being able to vertically move said lower bell. 8. Dispositif selon la revendication 6 et 7, caractérisé en ce que la cloche inférieure (2) est munie de plots latéraux (23) aptes à venir s'insérer dans des rainures latérales extérieures (65) de la plaque support, et/ou dans des perçages de la contre-plaque (76). 8. Device according to claim 6 and 7, characterized in that the lower bell (2) is provided with lateral studs (23) adapted to be inserted in the outer lateral grooves (65) of the support plate, and / or in holes of the counterplate (76). 9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que la contre-plaque (76) est de dimensions extérieures supérieures à io celles des cloches (1, 2), et présente au moins une portion (764) s'étendant au-delà des parois latérales des cloches. 9. Device according to one of claims 1 to 8, characterized in that the counter-plate (76) is of external dimensions greater than those of the bells (1, 2), and has at least a portion (764) s extending beyond the side walls of the bells. 10. Dispositif selon la revendication 9, caractérisé en ce que la contre-plaque présente une portion avant (764) s'étendant au-delà des parois latérales avant (12a, 23a) des cloches, ladite portion avant 1s présentant un bord de guidage (765) de forme générale concave pour tendre vers les extérieurs le film en sortie d'enceinte (E). 10. Device according to claim 9, characterized in that the counter plate has a front portion (764) extending beyond the front side walls (12a, 23a) of the bells, said front portion 1s having a guide edge (765) of generally concave shape for tending outwards the film at the speaker output (E).
FR0801315A 2008-03-11 2008-03-11 DEVICE FOR SEALING CONTAINERS Active FR2928626B1 (en)

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FR2963322A1 (en) * 2010-08-02 2012-02-03 Guelt Automatic leak-proof sealing device for plastic food product tray, has guiding units cooperating with complementary guiding units of parts to guide displacement of plate in translation, with edges during positioning and withdrawal of plate
WO2012107668A1 (en) * 2011-02-11 2012-08-16 Mecapack Tool-holder device for a lidding machine and lidding machine incorporating such a device
US20140165502A1 (en) * 2011-07-01 2014-06-19 Leung Chi Wah Sealing Apparatus
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FR3056195A1 (en) * 2016-09-22 2018-03-23 Guelt OPERATING DEVICE WITH CONTAINER MEDIA MEANS AND MOBILE HEATER BLOCK AND CORRESPONDING METHOD
FR3058989A1 (en) * 2016-11-22 2018-05-25 Guelt OPERATING MACHINE OF TRAILERS
IT201700060407A1 (en) * 2017-06-01 2018-12-01 Machsolutions Sa EQUIPMENT FOR PACKAGING CONTAINERS
CN109850273A (en) * 2018-12-29 2019-06-07 北海绩迅电子科技有限公司 A kind of print cartridge automatic sealing
CN110603135A (en) * 2017-11-30 2019-12-20 长野自动机械株式会社 Welding device
US20200346832A1 (en) * 2018-01-19 2020-11-05 Martin ELLERTS Dishware Unit and Method for Sealing Partially Prepared Meals

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FR2950030A1 (en) * 2009-09-17 2011-03-18 Guelt Device for sealing plastic tray that is utilized for packaging food products under e.g. vacuum atmosphere, has coupling units cooperating with complementary coupling units of head to couple and uncouple sole to and from jack
FR2963322A1 (en) * 2010-08-02 2012-02-03 Guelt Automatic leak-proof sealing device for plastic food product tray, has guiding units cooperating with complementary guiding units of parts to guide displacement of plate in translation, with edges during positioning and withdrawal of plate
WO2012107668A1 (en) * 2011-02-11 2012-08-16 Mecapack Tool-holder device for a lidding machine and lidding machine incorporating such a device
FR2971489A1 (en) * 2011-02-11 2012-08-17 Mecapack TOOL HOLDER DEVICE FOR OPERCULATING MACHINE AND OPERCULATING MACHINE INCORPORATING SUCH A DEVICE
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US9828129B2 (en) 2013-02-22 2017-11-28 Multivac Sepp Haggenmueller Se & Co. Kg Deep-drawing packaging machine with sealing station
ITBO20130105A1 (en) * 2013-03-12 2014-09-13 Gruppo Fabbri Vignola Spa APPARATUS FOR MECHANIZED REPLACEMENT OF WELDING AND CUTTING MODULES IN MACHINES FOR SEALING PRODUCTS IN TRAYS
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US20140290188A1 (en) * 2013-03-27 2014-10-02 Multivac Sepp Haggenmüller Gmbh & Co. Kg Tray sealer and method
ITVA20130067A1 (en) * 2013-12-20 2015-06-21 Rivac Srl ANTI-CONTAMINATION AND SAFETY SYSTEM FOR THE OPERATOR, APPLIED TO THERMO-SEALING MACHINES FOR FILLING AND SEALING CONTAINERS WITH LIQUIDS.
WO2015092772A1 (en) * 2013-12-20 2015-06-25 Rivac S.R.L. Thermo-sealing apparatus for filling and sealing liquid containers
US10556711B2 (en) 2013-12-20 2020-02-11 Combifill S.R.L. Thermo-sealing apparatus for filling and sealing liquid containers
CN104443572A (en) * 2014-11-26 2015-03-25 苏州奥托瓦克自动化设备有限公司 Automatic sealing machine
CN106428684A (en) * 2016-09-21 2017-02-22 北京小罐茶业有限公司 Container sealing device and method
FR3056195A1 (en) * 2016-09-22 2018-03-23 Guelt OPERATING DEVICE WITH CONTAINER MEDIA MEANS AND MOBILE HEATER BLOCK AND CORRESPONDING METHOD
FR3058989A1 (en) * 2016-11-22 2018-05-25 Guelt OPERATING MACHINE OF TRAILERS
IT201700060407A1 (en) * 2017-06-01 2018-12-01 Machsolutions Sa EQUIPMENT FOR PACKAGING CONTAINERS
WO2018220574A1 (en) * 2017-06-01 2018-12-06 Machsolutions Sa Apparatus for manufacturing containers
CN110691736A (en) * 2017-06-01 2020-01-14 马克解决方案股份公司 Device for producing containers
CN110603135A (en) * 2017-11-30 2019-12-20 长野自动机械株式会社 Welding device
CN110603135B (en) * 2017-11-30 2021-07-09 长野自动机械株式会社 Welding device
US20200346832A1 (en) * 2018-01-19 2020-11-05 Martin ELLERTS Dishware Unit and Method for Sealing Partially Prepared Meals
CN109850273A (en) * 2018-12-29 2019-06-07 北海绩迅电子科技有限公司 A kind of print cartridge automatic sealing

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