Classifications

• • 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
  • B29C66/72—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 characterised by the structure of the material of the parts to be joined
  • B29C66/723—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 characterised by the structure of the material of the parts to be joined being multi-layered
  • B29C66/7232—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 characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
  • B29C66/72321—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 characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
• • 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
  • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
  • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
  • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
• • 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
  • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
  • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
  • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
  • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
• • 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
  • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
  • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
  • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
  • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
  • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
• • 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
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
  • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
• • 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
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
  • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
• • 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
  • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
  • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow 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
  • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
  • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
  • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
  • B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
  • B29C66/83423—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
• • 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
  • B29C66/849—Packaging machines
• • 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
  • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
  • B65B51/10—Applying or generating heat or pressure or combinations thereof
  • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
• • 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
  • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
  • B65B51/10—Applying or generating heat or pressure or combinations thereof
  • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
  • B65B51/227—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by induction welding
• • 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
  • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
  • B65B7/2842—Securing closures on containers
  • B65B7/2878—Securing closures on containers by heat-sealing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
  • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
  • B67B5/00—Applying protective or decorative covers to closures; Devices for securing bottle closures with wire
• • 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
  • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
  • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
  • B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils

Definitions

• Linear transfer machine and method employing high frequency magnetic induction for plugging containers.
• the present invention is in the field of techniques for capping containers, such as flasks, jars, or the like, and its subject is a method of induction heat sealing as well as preferred means of implementing said method and a capping machine and / or heat-sealing the containers.
• a first object of the present invention is to provide a transfer machine for capping and / or thermosealing of containers at a very high rate, independently of the thermosealing means used.
• a second aim is to propose a high frequency induction heat sealing process in which the production of the magnetic field is carried out at a fixed station, thereby eliminating the drawbacks of the mobility of the inductor.
• an automatic machine for capping and / or heat sealing a container by means of a cover and / or a capsule is generally characterized in that the transfer of the containers is linear, or rectilinear, on at least the part of the machine where the capping and / or heat sealing operations are carried out, and mainly in that said machine comprises for cooperation a first so-called lower conveyor or even carrier on which the containers are placed, said carrier conveyor being rectilinear on at least part of its path, a second so-called upper or presser conveyor, said second conveyor being, on part of its path, rectilinear and substantially parallel to said rectilinear part of the first conveyor and being located at -above it at a distance very slightly less than the height of the capped containers, said second conveyor having an inlet section inclined upwards with a gentle slope, said second conveyor supporting equidistant capping and / or heat-sealing members, and finally motor and transmission means for isokinetically animating said first and second conveyors.
• Such a machine comprises, as is known for circular machines, in the vicinity of its inlet section at least one screw, and preferably two superimposed, constituting an evenly distributed means of the containers on the carrier conveyor, said screw at least being animated in synchronism with said conveyors.
• the carrier conveyor being supported and guided by a frame of the machine
• the presser conveyor is supported and guided by a chassis adjustable in height above the frame. It follows from this arrangement that the machine can admit containers of any height within reasonable limits and that the pressure exerted by the pressure conveyor can be finely adjusted.
• a method of thermosealing a cover on a container is mainly characterized, in that said container is movable relative to the inductor, and in what is interposed between the inductor and said metal parts of the cover or container an electrically conductive piece, called focusing relay, said relay accompanying the container in its relative movement, said relay being intended to intercept a large flow from the inductor in order to restore in the vicinity of said metal parts a flow substantially equal to
• the inductor is fixed relative to a machine frame, itself fixed relative to the ground and consequently it is the containers which are mobile compared to the machine frame which is thus defined as a heat transfer and possibly capping transfer machine.
• the method as defined above in its generality is applicable both to a circular transfer machine and to a linear transfer machine as described above and that it is entirely suitable for the latter type of high rate machine transfer. .
• said inductor extends over a certain part, called heating zone, of the path of the containers; it is also necessary that the cover is kept under pressure during its passage through the heating zone and then consecutively during its passage through a so-called cooling zone; practically the length, on the path of the containers, of the cooling zone will be equal to at least three times the length of the heating zone.
• the aforementioned focusing relay consists, in the generality of its design, of two electrically conductive loops forming a single circuit, the first so-called interception loop, delimiting a fairly large surface, being intended to intercept part of the flow of the inductor to generate an intense current in the circuit, the second so-called restitution loop, delimiting an area substantially identical to the section of the neck of the container, being intended to restore, under the effect of said current, a significant flow in the vicinity of said pass.
• said focusing relay is a metal crown, of copper for example, split on a radius to interrupt the continuity of the crown; thus the first loop is constituted by the outer edge of a metal crown, or circle hollowed out in its center, the second loop is constituted by the inner edge of the crown, or of the central recess, the first and second loops being connected to constitute a single circuit by the edges of a cut interrupting the continuity of the crown.
• the edge of said central recess intended to be opposite the container to be capped is shaped as a shoulder so as to be able to simultaneously press on the cover and surround the upper edge of the neck.
• the focusing relays are removably mounted on the capping machines, by means of a support piece on which they are permanently fixed; this part, as well as the organs' of the machine which supports it, is made of non-conductive material.
• Fig. 1 is a schematic representation seen from above of a linear capping machine and / or heat sealing according to the invention
• Fig.2 is an elevation of the same
• Fig.3 is a more detailed illustration of an input section of a machine from the previous figures
• Fig.4 is a schematic illustration of the implementation of the method according to the invention.
• Fig.5 is a plan view of an embodiment of a focusing relay and its support part, implemented in the method of the previous figure,
• Fig.6 is a section of the same
• Fig.7 is a partial schematic illustration in plan of the implementation of the method of Fig.4 by means of a linear transfer machine
• Fig.8 is a schematic illustration partial plan of the implementation of the method of FIG. 4 by means of a circular transfer machine
• Fig.8bis is a section along AA of the previous figure.
• the capping and / or sealing of containers such as bottles 1 is carried out by means of a linear transfer machine which essentially consists of two endless conveyors 2 and 3 delimiting in height a transport corridor 4 or circulation of containers; the conveyor 2, said carrier, is supported and guided by means of slides for example, by a frame 5 of the machine; this conveyor, according to this structure, is driven by pinions, drums, or other members such as 6.
• the conveyor 3, said presser, is supported by a chassis 7 adjustable in height above the chassis 5; the height adjustment is preferably obtained by moving the chassis 7 along rails or vertical guide columns 8 and 9 by means of vertical screws driven in rotation by a common shaft and angle return gears; this movement mechanism is not shown in the figures.
• the pressure conveyor 3 has an entry section 10 inclined upwards in a gentle slope, so that the support of the conveyor on the containers is done progressively as they are introduced into the transfer corridor. 4 supported by conveyor 2.
• the machine comprises, like the machines of the prior art, supply means 11 and discharge means 12, such as a carpet. It has at its inlet section a couple of superimposed screws 13 constituting an evenly distributed means of the containers on the carrier conveyor; however and in accordance with the invention, it takes advantage of the firm holding of the containers in the threads of its screws in order to use the inlet section of the machine as a station for fitting the plug by means of a distributor shown diagrammatically at 14.
• the pressure conveyor 3, the carrying conveyor 2 and the equiparticulating screws 13 are driven in synchronism, or alternatively isokinetic, with respect to the movement that each prints in the containers, by means of a variable speed drive group 18 and by means of transmission means shown schematically in 15 which can be chains as well as trees, insisting however on the positive character of these transmissions.
• the transfer corridor 4 is divided into two sections: a section 16, called heating, adjacent to the inlet section, and a section 17, called cooling.
• a section 16 and 17 are such that they allow on the one hand the melting of the heat sealing material comprised between the cover and the edge of the container, and d on the other hand the resolidification of this material; these lengths also depend on the heating means used; if not example the heat is brought by conduction by means of a hot room, it will take more cooling time, therefore a greater length of the section 17 than if the rise in temperature results from the action of a field such as magnetic or electro-magnetic (microwave). It seems, according to the Applicant's experience, that the ratio of the lengths of sections 16 to 17 respectively, is at most equal to a third, or even that the length of the cooling section is at least three times the length of the heating section.
• the conveyor 3 is a belt made up of pallets such as 20 articulated to each other in the manner of chain spindles, a pair of notched wheels 21, called input wheels, anchor in the hinge pins 22 of the pallets and ensure a positive drive of the belt; there is a slide 23 on the lower edge of the chassis 7 made of a material such as Teflon with a low coefficient of friction; the slide 23 is intended to constitute a firm support for the pallets 20.
• the pallets 20 have a length equal to a fraction of the pitch of the screws 13 and some of them support a sealing and / or heat-sealing member, such as the organs 24.
• the frame 7 may include a recess 27 intended to constitute a housing for heating means.
• thermosceliage of the invention there is shown a container 30 circulating below an induction loop 31; the container 30, bottle in this case, is supported by a plate 32 while a plate 33 compresses by means of a split metal crown 34 a capsule 35 on the neck of the container.
• the loop 31 is constituted by a hollow tube made of electrically conductive metal such as copper; the hollow tube is supplied with high frequency alternating current, for example two megahertz; the passage of current in the loop produces a magnetic field of identical frequency; this field at a given time can be represented by the arrows 36; it will be noted that the technology of such induction loops, as well as their means of supply, is well known in itself.
• the method of the invention consists in circulating in the magnetic field produced by the loop the crown 34 bearing on the plug.
• the crown 34 has a conformation which will be described later and which allows it to act as a relay concentrating the magnetic flux picked up by its entire surface, in its central recess; the crown is therefore called the focusing relay.
• the focusing relay is a metal ring 34 split at 37; therefore the periphery 38 of the crown constitutes a conductive loop in which the variable magnetic flux induces a current; this current is all the stronger for a given field and frequency the larger the diameter of the crown.
• the induced current is transmitted in the loop 39 constituted by the edge of the central recess 40, by the slot edges 41 and 42; the periphery 38 of the crown constitutes an interception loop while the periphery 39 of the central recess constitutes a restitution loop.
• the edge of the recess 39 is shaped as a shoulder 41 to cap the capsule 35 and allow it to exert pressure while making the loop 39 as close as possible to the metal parts included under the capsule.
• split crowns such as 34 are permanently mounted on supports 43 which are themselves provided with adaptation means on the corking machine.
• the capping transfer machines allowing the implementation of the process described above will advantageously be of one of two types, with linear transfer or with circular transfer.
• FIG. 7 which schematically illustrates part of the induction or heating zone, the machine is a linear transfer machine similar to that of FIGS. 1 to 3.
• the induction loop 50 has a median axis 51 along the following lines the straight path of the focusing relays such as 52; the relay relays 52 are mounted on pallets 53 hinged to each other in the manner of chain links, as was said for the machine of Figures 1 to 3; in the machine of these figures, the housing 27 made in the chassis 7 can be used to house the inductor 50.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closing Of Containers (AREA)
• Package Closures (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9228002

Family Applications (1)

Country Status (6)

Families Citing this family (6)

Family Cites Families (7)

• 1979
  • 1979-07-12 FR FR7918544A patent/FR2460885B1/fr not_active Expired
• 1980
  • 1980-07-10 IT IT49211/80A patent/IT1128127B/it active
  • 1980-07-10 WO PCT/FR1980/000119 patent/WO1981000250A1/fr not_active Application Discontinuation
  • 1980-07-11 ES ES494163A patent/ES494163A0/es active Granted
  • 1980-07-11 BE BE0/201375A patent/BE884275A/fr not_active IP Right Cessation
• 1981
  • 1981-02-09 EP EP80901327A patent/EP0032909A1/fr not_active Ceased

Non-Patent Citations (1)

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