FR2690412A1 - Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars. - Google Patents

Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars. Download PDF

Info

Publication number
FR2690412A1
FR2690412A1 FR9205019A FR9205019A FR2690412A1 FR 2690412 A1 FR2690412 A1 FR 2690412A1 FR 9205019 A FR9205019 A FR 9205019A FR 9205019 A FR9205019 A FR 9205019A FR 2690412 A1 FR2690412 A1 FR 2690412A1
Authority
FR
France
Prior art keywords
walls
film
welding
central part
cutting
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.)
Withdrawn
Application number
FR9205019A
Other languages
French (fr)
Inventor
Even Jean-Claude
Roch Olivier
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.)
Cga Hbs
Original Assignee
Cga Hbs
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 Cga Hbs filed Critical Cga Hbs
Priority to FR9205019A priority Critical patent/FR2690412A1/en
Publication of FR2690412A1 publication Critical patent/FR2690412A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/02—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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/245—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
    • 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
    • B29C65/741—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 characterised by the relationships between the joining step and the severing step
    • B29C65/7411—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 characterised by the relationships between the joining step and the severing step characterised by the temperature relationship between the joining step and the severing step
    • B29C65/7412—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 characterised by the relationships between the joining step and the severing step characterised by the temperature relationship between the joining step and the severing step the joining step and the severing step being performed at different temperatures
    • 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
    • B29C65/741—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 characterised by the relationships between the joining step and the severing step
    • B29C65/7415—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 characterised by the relationships between the joining step and the severing step characterised by the pressure relationship between the joining step and the severing step
    • B29C65/7416—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 characterised by the relationships between the joining step and the severing step characterised by the pressure relationship between the joining step and the severing step the joining step and the severing step being performed at different pressures
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8124—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81241—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/814—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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • 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
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • B65B61/10—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting using heated wires or cutters
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • 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
    • B29C65/743—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 the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A loop of film (12,14), provided by two motorised storage spools, runs between, and holds the object(s) beneath, two fill-width heads (32,34). On one (34), fixed (36), sealing bars (40,42) are screwed (44), over insulating spacers (46), above and below, to a central separating pointed nose-bar (82), heated by an embedded element, thermostatically controlled (90) to 170 deg.C. The sealing bars, through limited thermal contact (78), attain only 155 deg.C. When the films are pushed (D) against the fixed head, by the rubber-faced (62) resilient foam pad (56) of the mobile head (50), they are welded at each sealing bar and severed at the nose-bar. A conveyor removes the sealed package; the shortened loop receives the next object(s). Contact surfaces are teflon treated to prevent adhesion. ADVANTAGE - High operating rate. Accepts objects of varying bulk.

Description

DISPOSrHF D'EMBALLAGE D'UN PAQUET D'OBJETS
A L'AIDE D'UN FILM EN MATERIAU PLASTIQUE
La présente invention a pour objet un dispositif pour l'emballage d'un paquet d'objets à l'aide d'un film en matériau plastique.PACKAGING OF A PACKAGE OF OBJECTS
USING A PLASTIC MATERIAL FILM
The present invention relates to a device for packaging a package of objects using a plastic film.

Parmi les différentes techniques utilisées pour emballer des paquets d'objets, on peut citer en particulier celle qui consiste à utiliser un film thermoplastique constitué soit par un manchon, soit par deux parois disposées parallèlement, qui est soudé de part et d'autre du paquet à emballer. La partie ayant servi à l'emballage est découpée du reste du film pour séparer le paquet ainsi constitué et préparer le film pour l'emballage du paquet suivant. Among the different techniques used for packaging packages of objects, mention may be made in particular of using a thermoplastic film consisting either of a sleeve or of two walls arranged in parallel, which is welded on either side of the package. to pack. The part used for packaging is cut from the rest of the film to separate the package thus formed and prepare the film for packaging the next package.

Sur la figure 1, on a représenté de façon schématique un tel système d'emballage. Sur cette figure, on a représenté deux parois parallèles de film thermoplastique 12 et 14 servant à l'emballage, une extrémité des films 12 et 14 est thermosoudé en 16. On place entre les deux parois 12 et 14 au-dessus de la soudure 16 le paquet 18 à emballer. Dans l'étape suivante, il faut d'une part réaliser les soudures 20 et 22 respectivement pour fermer le paquet 18 et pour préparer le paquet suivant et découper les deux parois 12 et 14 du film en 24 entre les deux soudures pour individualiser le paquet ainsi emballé. In Figure 1, there is shown schematically such a packaging system. In this figure, there are shown two parallel walls of thermoplastic film 12 and 14 used for packaging, one end of the films 12 and 14 is heat-sealed at 16. It is placed between the two walls 12 and 14 above the weld 16 package 18 to be packed. In the next step, it is necessary on the one hand to carry out the welds 20 and 22 respectively to close the package 18 and to prepare the next package and cut the two walls 12 and 14 of the film at 24 between the two welds to individualize the package well packed.

On comprend donc que l'opération de base réalisée par les dispositifs d'emballage de ce type consiste dans la réalisation des soudures 20 et 22 et celle de la découpe 24 dans une zone disposée entre les soudures 20 et 22. It is therefore understood that the basic operation carried out by packaging devices of this type consists in the production of the welds 20 and 22 and that of the cutout 24 in an area disposed between the welds 20 and 22.

Pour réaliser cette opération, on utilise le plus souvent un fil chauffant pour la soudure 20 de fermeture du paquet constitué, un fil chauffant de découpe et un fil pour le soudage 22 des deux extrémités du film thermoplastique destiné à recevoir le paquet d'objets suivant. On peut également utiliser un seul fil chauffant pour réaliser simultanément les trois opérations, la génératrice de contact réalisant la découpe. To carry out this operation, most often a heating wire is used for the welding 20 for closing the packet made up, a heating cutting wire and a wire for welding 22 the two ends of the thermoplastic film intended to receive the following packet of objects. . It is also possible to use a single heating wire to carry out the three operations simultaneously, the contact generator performing the cutting.

Ces solutions présentent l'inconvénient de nécessiter un entretien et un contrôle très fréquents des fils chauffants qui sont incompatibles avec des machine qui doivent être utilisées à des cadences élevées. En outre, d'une manière générale, ces techniques par fil chauffant ne permettent pas d'obtenir des cadences de fonctionnement associées à une sécurité de fonctionnement quant à la qualité des soudures compatibles avec certaines utilisations. C'est notamment le cas dans les chaînes de conditionnement automatique de courrier préalablement trié. Cette chaîne de conditionnement est munie d'un convoyeur transférant des paquets à une cadence de 21 paquets par minute vers la machine d'emballage. En outre, cette machine doit pouvoir fonctionner pour des paquets d'objets à emballer dont l'épaisseur peut être très variable puisqu'elle peut aller de quelques millimètres à 120 millimètres. These solutions have the drawback of requiring very frequent maintenance and control of the heating wires which are incompatible with machines which must be used at high rates. In addition, in general, these heating wire techniques do not make it possible to obtain operating rates associated with operational safety as regards the quality of the welds compatible with certain uses. This is particularly the case in automatic packaging chains for pre-sorted mail. This packaging line is equipped with a conveyor transferring packages at a rate of 21 packages per minute to the packaging machine. In addition, this machine must be able to operate for packages of objects to be packaged, the thickness of which can be very variable since it can range from a few millimeters to 120 millimeters.

La présente invention a pour objet de remédier aux inconvénients des techniques mentionnées ci-dessus en permettant la réalisation de l'emballage de paquets d'objets d'épaisseur variable à des cadences très élevées tout en assurant une grande sécurité de la qualité des soudures effectuées. The object of the present invention is to remedy the drawbacks of the techniques mentioned above by making it possible to package packages of objects of variable thickness at very high rates while ensuring high safety in the quality of the welds carried out. .

Pour atteindre ce but, le dispositif pour l'emballage d'un paquet d'objets à l'aide d'un film en matériau plastique présentant deux parois entre lesquelles doit être enserré le paquet, du type comportant des moyens pour thermosouder les parois de part et d'autre dudit paquet et pour découper les parois-du film enserrant un paquet du reste du film, se caractérise en ce qu'il comprend un premier ensemble de pressage, un deuxième ensemble de soudage et de découpage disposé en regard du premier ensemble, lesdits deux ensembles étant placés de part et d'autre des parois dudit film, et des moyens pour imprimer aux deux pièces un mouvement de rapprochement relatif pour enserrer les deux parois dudit film, ledit deuxième ensemble comportant une pièce centrale présentant une arête de découpage disposée parallèlement auxdites parois, deux pièces latérales disposées de part et d'autre de ladite pièce centrale et présentant chacune une face de soudage dudit matériau plastique, lesdites pièces latérales étant raccordées à ladite pièce centrale par des moyens présentant une conductibilité thermique, et des moyens de chauffage disposés dans ladite pièce centrale pour porter ladite arête à une première température T1 apte à provoquer la découpe desdites parois, lesdits moyens présentant une conductibilité thermique étant déterminés pour que lesdites faces de soudage des pièces latérales soient portées à une température T2 apte à provoquer le soudage mutuel des deux parois. To achieve this goal, the device for packaging a packet of objects using a plastic film having two walls between which the packet must be clamped, of the type comprising means for heat sealing the walls of on either side of said package and for cutting the walls of the film enclosing a package from the rest of the film, is characterized in that it comprises a first pressing assembly, a second welding and cutting assembly arranged opposite the first together, said two sets being placed on either side of the walls of said film, and means for imparting to the two pieces a relative approximation movement to enclose the two walls of said film, said second set comprising a central piece having an edge of cutting arranged parallel to said walls, two lateral pieces arranged on either side of said central piece and each having a welding face of said plast material ique, said side pieces being connected to said central piece by means having a thermal conductivity, and heating means arranged in said central piece to bring said edge to a first temperature T1 capable of causing the cutting of said walls, said means having a thermal conductivity being determined so that said welding faces of the side pieces are brought to a temperature T2 capable of causing mutual welding of the two walls.

De préférence, le film est en polyéthylène, les moyens de chauffage sont aptes à porter ladite arête de la pièce centrale à une température T1 de l'ordre de 1700C et les moyens présentant une conductibilité thermique sont déterminés pour que lesdites faces de soudage des pièces latérales aient une température
T2, en statique, de l'ordre de 155in. Preferably, the film is made of polyethylene, the heating means are capable of bringing said edge of the central part to a temperature T1 of the order of 1700C and the means having a thermal conductivity are determined so that said welding faces of the parts side have a temperature
T2, static, around 155in.

On comprend ainsi que, bien que l'organe servant à réaliser les deux soudages et le découpage du film thermoplastique soit constitué par une pièce unique, on peut contrôler de façon fiable et convenable la différence de température entre la pièce de découpage et les pièces de soudage de manière à obtenir très rapidement un découpage effectif et les deux soudages nécessaires dans des conditions d'efficacité optimales. It will thus be understood that, although the member used to carry out the two welds and the cutting of the thermoplastic film is constituted by a single piece, it is possible to control the temperature difference between the cutting piece and the pieces of welding so as to very quickly obtain an effective cutting and the two welding operations required under optimal efficiency conditions.

D'autres caractéristiques et avantages de la présente invention apparaîtront mieux à la lecture de la description qui suit d'un mode préféré de réalisation de l'invention donné à titre d'exemple non limitatif. La description se réfère aux figures annexées sur lesquelles:
- la figure 1, déjà décrite, illustre le principe d'emballage utilisé dans l'invention;
- la figure 2 montre en vue de dessus l'ensemble du dispositif d'emballage;
- la figure 3 montre en élévation une des pièces de soudage;
- la figure 4 montre en vue de côté la pièce de soudage de la figure 3;
- la figure 5 montre en élévation la pièce de découpe;
- les figures 6 et 7 sont respectivement des coupes de la pièce de découpe de la figure 5 selon les lignes VI-VI et VII-VII de cette figure;;
- la figure 8 est une vue de détail de la partie D de la figure 5;
- la figure 9 est une vue simplifiée d'une machine utilisant le dispositif d'emballage des figures 2 à 8 ; et
- les figures 10a à 10f illustrent les différentes étapes de l'emballage d'un paquet d'objets, parexemple de lettres.Other characteristics and advantages of the present invention will appear better on reading the following description of a preferred embodiment of the invention given by way of non-limiting example. The description refers to the appended figures in which:
- Figure 1, already described, illustrates the packaging principle used in the invention;
- Figure 2 shows a top view of the entire packaging device;
- Figure 3 shows in elevation one of the welding parts;
- Figure 4 shows a side view of the welding part of Figure 3;
- Figure 5 shows in elevation the cutting piece;
- Figures 6 and 7 are respectively sections of the cutting part of Figure 5 along lines VI-VI and VII-VII of this figure;
- Figure 8 is a detail view of part D of Figure 5;
- Figure 9 is a simplified view of a machine using the packaging device of Figures 2 to 8; and
- Figures 10a to 10f illustrate the different stages of the packaging of a packet of objects, for example letters.

En se référant tout d'abord à la figure 2, on va décrire l'ensemble du dispositif d'emballage. Le dispositif d'emballage qui porte la référence générale 30 est constitué essentiellement par un ensemble contre-soudeur 32 et un ensemble de découpage et de soudage 34. Ces deux ensembles sont disposés de part et d'autre des parois du film plastique 12, 14 à souder et à découper. Referring first to Figure 2, we will describe the entire packaging device. The packaging device which has the general reference 30 consists essentially of a counter-welder assembly 32 and a cutting and welding assembly 34. These two assemblies are arranged on either side of the walls of the plastic film 12, 14 to weld and cut.

L'ensemble de soudage et de découpage 34 est fixe par rapport au bâti 36 de la machine tandis que la pièce 32 de contre-soudage est mobile selon la direction
D de telle manière que la pièce 32 présente une position de repos, ce qui est montré sur la figure 2, et une position active dans laquelle cette pièce vient au contact de la pièce 34 de soudage et de découpage, les parois 12 et 14 du film étant pincées entre ces deux ensembles. Comme le montre cette figure, l'ensemble de soudage 34 comporte une pièce centrale de découpage 38 et deux pièces latérales de soudage 40 et 42. Comme on le voit, les pièces latérales 40 et 42 sont solidarisées par des vis-écrous tels que 44 avec interposition de rondelles isolantes telles que 46 entre les pièces de soudage 40, 42 et la pièce de découpage central 38. On décrira ultérieurement plus en détails l'ensemble de soudage et de découpage.The welding and cutting assembly 34 is fixed relative to the frame 36 of the machine while the counter-welding piece 32 is movable in the direction
D such that the part 32 has a rest position, which is shown in FIG. 2, and an active position in which this part comes into contact with the part 34 for welding and cutting, the walls 12 and 14 of the film being pinched between these two sets. As shown in this figure, the welding assembly 34 comprises a central cutting part 38 and two lateral welding parts 40 and 42. As can be seen, the lateral parts 40 and 42 are secured by screw-nuts such as 44 with interposition of insulating washers such as 46 between the welding pieces 40, 42 and the central cutting piece 38. The welding and cutting assembly will be described later in more detail.

En ce qui concerne l'ensemble de contre-soudage, il est constitué par un support allongé constitué par le corps 50 et deux flasques latérales 52 et 54 définissant ainsi une gorge 56. La gorge 56 est remplie par une mousse isolante 60 et recouverte quant à sa face tournée vers la pièce 34 par une lame 62 en caoutchouc plus dur que la mousse. De préférence, la lame 62 qui présente une certaine courbure est recouverte d'un tissu de verre en téflon. Le remplissage de mousse 60 constitue l'équivalent d'une pièce amortisseur lorsque la lame 62 entre en contact avec la pièce de soudage et de découpage 34. On comprend que le revêtement en téflon permet d'éviter l'adhérance du film thermosoudable lors de l'opération de soudage et de découpage sur la lame 62. As regards the counter-welding assembly, it is constituted by an elongated support constituted by the body 50 and two lateral flanges 52 and 54 thus defining a groove 56. The groove 56 is filled with an insulating foam 60 and covered with on its face turned towards the part 34 by a blade 62 made of rubber harder than the foam. Preferably, the blade 62 which has a certain curvature is covered with a Teflon glass cloth. The foam filling 60 constitutes the equivalent of a damping part when the blade 62 comes into contact with the welding and cutting part 34. It is understood that the teflon coating makes it possible to avoid the adhesion of the heat-sealable film during the welding and cutting operation on the blade 62.

Les figures 3 et 4 montrent un mode préféré de réalisation des pièces de soudage 40 et 42. Ces figures représentent par exemple la pièce de soudage 40. FIGS. 3 and 4 show a preferred embodiment of the welding parts 40 and 42. These figures represent, for example, the welding part 40.

Elle est réalisée en un matériau métallique conducteur de la chaleur et elle a la forme d'un barreau allongé à section droite rectangulaire. Plus précisément, en section droite, le côté actif 40a est raccordé aux deux faces latérales du barreau par des arrondis 40b. En outre, pour éviter le collage du matériau thermoplastique à souder, la face active 40a et les faces latérales de la pièce 40 sont recouvertes d'un revêtement de téflon 70. En outre, comme on le voit mieux sur la figure 3, des trous de fixation 72 sont régulièrement espacés selon la longueur de la pièce 40. A titre d'exemple, chaque pièce de soudage a une épaisseur de l'ordre de 3,5 mm.It is made of a metallic material that conducts heat and has the shape of an elongated bar with a rectangular cross section. More specifically, in cross section, the active side 40a is connected to the two lateral faces of the bar by rounded 40b. In addition, to avoid sticking of the thermoplastic material to be welded, the active face 40a and the lateral faces of the part 40 are covered with a teflon coating 70. In addition, as can be seen better in FIG. 3, holes fixing 72 are regularly spaced along the length of the piece 40. For example, each welding piece has a thickness of about 3.5 mm.

En se référant maintenant aux figures 5 à 8, on va décrire un mode préféré de réalisation de la pièce centrale 34 constituant la pièce de découpage. Referring now to Figures 5 to 8, we will describe a preferred embodiment of the central part 34 constituting the cutting part.

Elle a également, la forme d'un barreau allongé dont la section droite est représentée sur les figures 6 et 7. La pièce 38 comporte un corps 74 prolongé par une portion de largeur réduite 76 raccordée au corps 74 par deux épaulements tels que 78. La partie 76 de la pièce 38 est prolongée par une portion à section droite triangulaire 80 formant ainsi une arête 82 de découpage qui est disposée parallèlement à la longueur du barreau. La pièce 38 est réalisée dans un matériau conducteur de la chaleur, de préférence métallique. Comme on le voit en particulier sur les figures 6 et 7, le corps 74 de la pièce 38 est muni d'un orifice cylindrique 84 qui s'étend sur toute la longueur de la pièce 38.Comme on l'indiquera ultérieurement, cet orifice sert à la mise en place à chaque extrémité de cet orifice d'éléments chauffants représentés schématiquement sur Ia figure 5 et référencés 86 et 88. A l'une de ses extrémités, la portion de dimension réduite 76 de la pièce 38 comporte un alésage borgne 90 qui débouche à l'une des extrémités de la pièce 38.It also has the form of an elongated bar whose cross section is shown in FIGS. 6 and 7. The part 38 comprises a body 74 extended by a portion of reduced width 76 connected to the body 74 by two shoulders such as 78. The part 76 of the part 38 is extended by a portion of triangular cross section 80 thus forming a cutting edge 82 which is arranged parallel to the length of the bar. The part 38 is made of a heat conducting material, preferably metallic. As seen in particular in FIGS. 6 and 7, the body 74 of the part 38 is provided with a cylindrical orifice 84 which extends over the entire length of the part 38. As will be indicated later, this orifice is used for the positioning at each end of this orifice of heating elements shown diagrammatically in FIG. 5 and referenced 86 and 88. At one of its ends, the reduced-size portion 76 of the part 38 has a blind bore 90 which opens at one end of the part 38.

La figure 8 montre plus en détails l'alésage 90 qui sert à la mise en place d'un capteur thermométrique, par exemple une sonde thermométrique 92. Cette sonde thermométrique 92 sert à contrôler la température effective de la pièce 38 et donc en particulier celle de l'arête de découpage 82 de celle-ci. La figure 6 montre que la partie 76 de la pièce 38 est munie d'orifices traversants 100 servant à fixer les pièces de soudage 40 et 42 comme on l'a déjà indiqué. FIG. 8 shows in more detail the bore 90 which is used for the installation of a thermometric sensor, for example a thermometric probe 92. This thermometric probe 92 is used to control the effective temperature of the part 38 and therefore in particular that of the cutting edge 82 thereof. Figure 6 shows that the part 76 of the part 38 is provided with through holes 100 used to fix the welding parts 40 and 42 as already indicated.

Sur la figure 5, on a représenté schématiquement un ensemble 102 de contrôle du chauffage de la pièce 38. On trouve un circuit 104 d'alimentation électrique des résistances chauffantes 88 et 86. Le circuit d'alimentation 104 est commandé par un circuit de traitement 106 qui reçoit les indications délivrées par la sonde thermométrique 92 et qui reçoit d'autre part sur son entrée 108 un signal de consigne de température T1. Le circuit de traitement 106 compare la température effective relevée par la sonde 92 à la température de consigne T1 et commande l'alimentation du circuit 104 en fonction de l'écart. In FIG. 5, there is shown diagrammatically an assembly 102 for controlling the heating of the room 38. There is a circuit 104 for supplying electrical power to the heating resistors 88 and 86. The supply circuit 104 is controlled by a processing circuit 106 which receives the indications delivered by the thermometric probe 92 and which also receives on its input 108 a temperature setpoint signal T1. The processing circuit 106 compares the effective temperature recorded by the probe 92 with the set temperature T1 and controls the supply of the circuit 104 according to the difference.

Si l'on revient à la figure 2, on voit que les pièces de soudage 40 et 42 sont solidaires de part et d'autre de la partie 76 de la pièce de découpage 38 par l'intermédiaire des vis et écrous 44 pénétrant dans les alésages 72 des pièces 40 et 42 et 100 de la pièce centrale 38. Comme on l'a indiqué des rondelles en matériau isolant 46 sont interposées entre ces trois pièces autour des vis 44 formant ainsi entretoises. En outre, on voit que la face postérieure 40c, 42c est en contact avec une partie des épaulements 78 de la pièce 38. On réalise ainsi un pont thermique entre la pièce 38 qui comporte les éléments de chauffage et les pièces latérales de soudage 40 et 42. On comprend également que la chaleur transmise par les éléments chauffants 86 et 88 de la pièce 38 est communiquée de façon contrôlée aux pièces de soudage 40 et 42 par le pont thermique qui vient d'être décrit.La chaleur est également transmise par rayonnement entre la portion 76 et la pièce 38 et les pièces de soudage 40 et 42 qui se font face mutuellement dans les zones non occupées par les rondelles isolantes 46. On voit ainsi qu'en réglant et en choisissant convenablement le matériau constituant les rondelles et la section droite des ponts thermiques entre les pièces 40 et 42 et la pièce centrale 38 on peut définir une différence de température entre les pièces de soudage 40 et 42 et l'arête 82 de découpage, en adaptant ainsi la conductibilité thermique de la liaison entre la pièce centrale 38 et les pièces latérales de soudage 40 et 42. Returning to FIG. 2, it can be seen that the welding pieces 40 and 42 are secured on either side of the part 76 of the cutting piece 38 by means of the screws and nuts 44 entering the bores 72 of the parts 40 and 42 and 100 of the central part 38. As indicated, the washers of insulating material 46 are interposed between these three parts around the screws 44 thus forming spacers. In addition, it can be seen that the rear face 40c, 42c is in contact with part of the shoulders 78 of the part 38. A thermal bridge is thus produced between the part 38 which includes the heating elements and the lateral welding parts 40 and 42. It is also understood that the heat transmitted by the heating elements 86 and 88 of the part 38 is communicated in a controlled manner to the welding parts 40 and 42 by the thermal bridge which has just been described. The heat is also transmitted by radiation between the portion 76 and the part 38 and the welding parts 40 and 42 which face each other in the zones not occupied by the insulating washers 46. It can thus be seen that by adjusting and choosing the material constituting the washers and the cross section of the thermal bridges between the parts 40 and 42 and the central part 38 a temperature difference can be defined between the welding parts 40 and 42 and the edge 82 of d splitting, thereby adapting the thermal conductivity of the connection between the central part 38 and the lateral welding parts 40 and 42.

De préférence lorsque le fini utilisé est en polyéthylène, la température de consigne T1 de l'arête de découpage est fixée à une valeur de l'ordre de 1700C. La conductibilité thermique entre la pièce 38 et les pièces de soudage 40 et 42 est adaptée de telle manière que, en dehors des phases de fonctionnement, la température des pièces de soudage soit de l'ordre de 155.C. Lors du fonctionnement du dispositif de soudage et de découpage, ce gradiant de température atteint 300C, c'est-à-dire que les températures des pièces de soudage T2 sont de l'ordre de 140in.  Preferably when the finish used is made of polyethylene, the set temperature T1 of the cutting edge is fixed at a value of around 1700C. The thermal conductivity between the part 38 and the welding parts 40 and 42 is adapted in such a way that, outside of the operating phases, the temperature of the welding parts is of the order of 155 ° C. During the operation of the welding and cutting device, this temperature gradient reaches 300C, that is to say that the temperatures of the welding parts T2 are of the order of 140in.

Avec ces valeurs de température et pour un film 12, 14 en polyéthylène, on obtient des opérations optimales de découpage et de soudage permettant d'obtenir la cadence de travail requise. With these temperature values and for a polyethylene film 12, 14, optimal cutting and welding operations are obtained, making it possible to obtain the required working rate.

Comme on le voit également sur la figure 2, l'ensemble de soudage et de découpage 34 est entouré par deux fiasques évasés 110 et 112 solidaires du bâti fixe 36. Ces fiasques ont d'une part pour but de constituer un écran thermique de part et d'autre de l'ensemble 34 et d'autre part d'éviter que les parois 12 et 14 du film thermoplastique ne viennent en contact des éléments de soudage 40 et 42 ou de l'élément de découpage 38. Pour éviter tout risque de collage, les extrémités 110a et 112a des flasques 110 et 112 sont revêtus d'un matériau du type téflon. As can also be seen in FIG. 2, the welding and cutting assembly 34 is surrounded by two flared flasks 110 and 112 integral with the fixed frame 36. These flasks have on the one hand the purpose of constituting a heat shield on the other and on the other of the assembly 34 and on the other hand to avoid that the walls 12 and 14 of the thermoplastic film come into contact with the welding elements 40 and 42 or with the cutting element 38. To avoid any risk bonding, the ends 110a and 112a of the flanges 110 and 112 are coated with a material of the Teflon type.

On comprend que, lorsque ron commande le déplacement de la pièce de contre-soudage 32 vers la pièce de soudage 34, les parois 12 et 14 à souder et à découper sont appliquées de façon élastique contre les extrémités de soudage 40a et 42a des pièces 40 et 42 et contre l'arête 82 de découpage. On obtient ainsi la découpe et les deux lignes de soudure illustrées précédemment. Les expériences montrent qu'il suffit d'un temps de compression, c'est-à-dire de contact, de l'ordre de 500 millisecondes pour obtenir un découpage effectif et deux traits de soudure de très bonne qualité. It is understood that, when ron controls the movement of the counter-welding piece 32 towards the welding piece 34, the walls 12 and 14 to be welded and cut are applied elastically against the welding ends 40a and 42a of the pieces 40 and 42 and against the cutting edge 82. This gives the cutout and the two weld lines illustrated above. Experiments show that compression time, that is to say contact time, of the order of 500 milliseconds is sufficient to obtain effective cutting and two very good weld lines.

La figure 9 montre de façon simplifiée une machine d'emballage incorporant le dispositif d'emballage qui a été décrit précédemment. Figure 9 shows a simplified packaging machine incorporating the packaging device which has been described above.

La machine 120 comprend un bâti 122. Son entrée est constituée par un convoyeur 124 pour acheminer les paquets 18 d'objets à emballer et un convoyeur 126 de sortie pour évacuer les paquets emballés. La machine comporte une bobine 128 de stockage de la paroi 12 du film et une bobine 130 de stockage de la paroi 14 du film. Différents rouleaux tels que 132, 134, 136, 138 et 139 permettent de guider les parois 12 et 14 jusqu'à la zone d'emballage 140. The machine 120 comprises a frame 122. Its inlet is constituted by a conveyor 124 for conveying the packages 18 of objects to be packaged and an outlet conveyor 126 for discharging the packaged packages. The machine comprises a reel 128 for storing the wall 12 of the film and a reel 130 for storing the wall 14 of the film. Different rollers such as 132, 134, 136, 138 and 139 guide the walls 12 and 14 to the packaging area 140.

La machine comporte également le dispositif d'emballage déjà décrit avec son élément de soudage et de découpage 34 solidaire de la partie 36 fixe de la machine et l'ensemble de contre-soudage 32 solidaire d'un support mobile 146 monté à l'extrémité du bras mobile 148. Au repos le bras 148 est en retrait. The machine also includes the packaging device already described with its welding and cutting element 34 secured to the stationary part 36 of the machine and the counter-welding assembly 32 secured to a movable support 146 mounted at the end of the movable arm 148. At rest the arm 148 is set back.

Lors de l'opération de l'emballage, on commande l'extension du bras de façon que l'ensemble 32 de contre-soudage vienne au contact de l'ensemble 34 de soudage et de découpage.During the packaging operation, the extension of the arm is controlled so that the counter-welding assembly 32 comes into contact with the welding and cutting assembly 34.

Les figures 10a à 10f illustrent les différentes étapes de fonctionnement de la machine d'emballage. La figure 10a montre le transfert du paquet 18 du convoyeur 124 vers le début de poche formée par les parois 12 et 14. Sur la figure 10b, les bobines 128 et 130 sont commandées pour provoquer le déroulement des parois 12 et 14 de telle manière que celles-ci arrivent en position d'emballage. Sur la figure 10c, on commande le déplacement de la partie 146 pour réaliser l'emballage. En 10d, on écarte la pièce 146 pour libérer le paquet 18 emballé. Celui-ci est recueilli et entraîné par le convoyeur 126 en 10e et 10f.  Figures 10a to 10f illustrate the different stages of operation of the packaging machine. FIG. 10a shows the transfer of the package 18 from the conveyor 124 to the start of the pocket formed by the walls 12 and 14. In FIG. 10b, the coils 128 and 130 are controlled to cause the unwinding of the walls 12 and 14 so that these arrive in the packaging position. In FIG. 10c, the movement of the part 146 is controlled to produce the packaging. In 10d, part 146 is moved aside to release the packet 18 packaged. This is collected and driven by the conveyor 126 in 10th and 10f.

Claims (6)

REVENDICATIONS 1. Dispositif pour l'emballage d'un paquet d'objets à l'aide d'un film en matériau plastique présentant deux parois (12, 14) entre lesquelles doit être enserré ledit paquet, (18), du type comportant des moyens pour thermosouder les parois de part et d'autre dudit paquet et pour découper les parois du film enserrant un paquet du reste du film, caractérisé en ce qu'il comprend un premier ensemble de pressage (32), un deuxième ensemble de soudage et de découpage (34) disposé en regard du premier ensemble, lesdits deux ensembles étant placés de part et d'autre des parois dudit film, et des moyens pour imprimer aux deux ensembles un mouvement de rapprochement relatif pour enserrer les deux parois dudit film, ledit deuxième ensemble comportant une pièce centrale en matériau conducteur thermique présentant une arête de découpage (82) disposée parallèlement auxdites parois, deux pièces latérales (40, 42) disposées de part et d'autre de ladite pièce centrale réalisée en un matériau conducteur thermique et présentant chacune une face de soudage (40a, 42a) dudit matériau plastique, lesdites pièces latérales étant raccordées à ladite pièce centrale par des moyens (46, 44, 78) présentant une conductibilité thermique, et des moyens de chauffage (86, 88) disposés dans ladite pièce centrale (38) pour porter ladite arête à une première température T1 apte à provoquer la découpe desdites parois, lesdits moyens présentant une conductibilité thermique étant déterminée pour que lesdites faces de soudage des pièces latérales soient portées à une température T2 apte à provoquer le soudage mutuel des deux parois. 1. Device for packaging a packet of objects using a plastic film having two walls (12, 14) between which said packet (18) is to be clamped, of the type comprising means for heat-sealing the walls on either side of said pack and for cutting the walls of the film enclosing a pack from the rest of the film, characterized in that it comprises a first pressing assembly (32), a second welding and cutout (34) disposed opposite the first set, said two sets being placed on either side of the walls of said film, and means for imparting to the two sets a relative approximation movement to enclose the two walls of said film, said second assembly comprising a central part made of thermal conductive material having a cutting edge (82) disposed parallel to said walls, two lateral parts (40, 42) arranged on either side of said central part produced of a thermally conductive material and each having a welding face (40a, 42a) of said plastic material, said side pieces being connected to said central piece by means (46, 44, 78) having a thermal conductivity, and heating means (86, 88) arranged in said central part (38) to bring said edge to a first temperature T1 capable of causing the cutting of said walls, said means having a thermal conductivity being determined so that said welding faces of the lateral parts are brought to a temperature T2 capable of causing mutual welding of the two walls. 2. Dispositif d'emballage selon la revendication 1, caractérisé en ce que le film (12, 14) est en polyéthylène, en ce que les moyens de chauffage (86, 88) sont aptes à porter ladite arête (82) de la pièce centrale à une température T1 de l'ordre de 170il et en ce que lesdits moyens présentant une conductibilité thermique (44, 46, 78) sont déterminés pour que lesdites faces de soudage des pièces latérales aient une température T2, en statique, de l'ordre de 155in.  2. Packaging device according to claim 1, characterized in that the film (12, 14) is made of polyethylene, in that the heating means (86, 88) are capable of carrying said edge (82) of the part. central at a temperature T1 of the order of 170 μl and in that said means having a thermal conductivity (44, 46, 78) are determined so that said welding faces of the side pieces have a temperature T2, statically, of 155in order. 3. Dispositif d'emballage selon l'une quelconque des revendications 1 et 2, caractérisé en ce que lesdits moyens présentant une conductibilité thermique comprennent des éléments entretoises (46) disposés entre ladite pièce centrale (38) et lesdites pièces latérales (40, 42) et réalisés en un matériau isolant thermique.  3. Packaging device according to any one of claims 1 and 2, characterized in that said means having a thermal conductivity comprise spacer elements (46) disposed between said central part (38) and said side parts (40, 42 ) and made of a thermal insulating material. 4. Dispositif d'emballage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens présentant une conductibilité thermique comprennent une surface de contact limité (78) entre ladite pièce centrale (38) et lesdites pièces latérales (40, 42). 4. Packaging device according to any one of claims 1 to 3, characterized in that the means having a thermal conductivity comprise a limited contact surface (78) between said central part (38) and said lateral parts (40, 42). 5. Dispositif d'emballage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ladite pièce centrale (38) est munie d'un alésage longitudinal (84) s'étendant parallèlement à l'arête de découpage (82), lesdits moyens de chauffage (86, 88) étant disposés à l'intérieur dudit alésage (84). 5. Packaging device according to any one of claims 1 to 4, characterized in that said central part (38) is provided with a longitudinal bore (84) extending parallel to the cutting edge (82) , said heating means (86, 88) being arranged inside said bore (84). 6. Dispositif d'emballage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ladite pièce centrale (38) est munie d'un capteur thermométrique (92) pour comander l'alimentation des moyens de chauffage (86, 88).  6. Packaging device according to any one of claims 1 to 5, characterized in that said central part (38) is provided with a thermometric sensor (92) to control the supply of the heating means (86, 88 ).
FR9205019A 1992-04-23 1992-04-23 Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars. Withdrawn FR2690412A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9205019A FR2690412A1 (en) 1992-04-23 1992-04-23 Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9205019A FR2690412A1 (en) 1992-04-23 1992-04-23 Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars.

Publications (1)

Publication Number Publication Date
FR2690412A1 true FR2690412A1 (en) 1993-10-29

Family

ID=9429191

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9205019A Withdrawn FR2690412A1 (en) 1992-04-23 1992-04-23 Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars.

Country Status (1)

Country Link
FR (1) FR2690412A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953430A2 (en) * 1998-04-27 1999-11-03 Ishida Co., Ltd. Heat sealer for synthetic resin bag
EP1083042A2 (en) * 1999-09-10 2001-03-14 Firma Skinetta Pac-Systeme Kiener GmbH & Co. Apparatus for welding and/or welding and cutting of films
WO2003047978A1 (en) 2001-12-05 2003-06-12 Tetra Laval Holdings & Finance S.A. Sealing unit
DE102007013197A1 (en) * 2006-11-10 2008-05-15 Beck Packautomaten Gmbh & Co. Sheets separation and sealing device for use in foil packaging machine, has differentiated heat conductive- and/or heat insulating units causing higher separation temperature in cutting device during heating operating bar
DE102007013198A1 (en) * 2006-11-10 2008-05-15 Beck Packautomaten Gmbh & Co. Sheets thermal separation device for use in sheet packaging machine, has work bar with receiver elements from base plate and insertion body with longitudinal grooves, which supplements to receiver hollow space for heating device
US7631473B2 (en) * 2004-09-21 2009-12-15 Nalle Iii Thomas A Cutter-sealer for cutting and sealing polymer sheets
US20180273217A1 (en) * 2015-01-08 2018-09-27 Colgate-Palmolive Company Devices and Methods for Making a Pouch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294830A (en) * 1961-04-18 1962-06-01 Automatic bagging device
DE1479649A1 (en) * 1964-08-14 1969-07-10 Rotostar S P A Device for separating and / or welding plastic films
US3574039A (en) * 1967-11-02 1971-04-06 Campbell Taggart Ass Bakeries Film sealing and cutting apparatus
DE2548786A1 (en) * 1975-10-31 1977-05-12 Aachen Fuerstenau Gmbh Maschba Plastic foil wrapping machine - with upper and lower winding systems, tensioning and blocking devices
FR2594094A1 (en) * 1986-02-10 1987-08-14 Polysar Ltd Apparatus and method for sealing a packaging film and for wrapping a product in a packaging consisting of such a film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1294830A (en) * 1961-04-18 1962-06-01 Automatic bagging device
DE1479649A1 (en) * 1964-08-14 1969-07-10 Rotostar S P A Device for separating and / or welding plastic films
US3574039A (en) * 1967-11-02 1971-04-06 Campbell Taggart Ass Bakeries Film sealing and cutting apparatus
DE2548786A1 (en) * 1975-10-31 1977-05-12 Aachen Fuerstenau Gmbh Maschba Plastic foil wrapping machine - with upper and lower winding systems, tensioning and blocking devices
FR2594094A1 (en) * 1986-02-10 1987-08-14 Polysar Ltd Apparatus and method for sealing a packaging film and for wrapping a product in a packaging consisting of such a film

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953430A2 (en) * 1998-04-27 1999-11-03 Ishida Co., Ltd. Heat sealer for synthetic resin bag
EP0953430A3 (en) * 1998-04-27 2000-11-22 Ishida Co., Ltd. Heat sealer for synthetic resin bag
US6301859B1 (en) 1998-04-27 2001-10-16 Ishida Co., Ltd. Heat sealer for synthetic resin bag
EP1083042A2 (en) * 1999-09-10 2001-03-14 Firma Skinetta Pac-Systeme Kiener GmbH & Co. Apparatus for welding and/or welding and cutting of films
EP1083042A3 (en) * 1999-09-10 2002-01-30 Firma Skinetta Pac-Systeme Kiener GmbH & Co. Apparatus for welding and/or welding and cutting of films
US6543202B1 (en) 1999-09-10 2003-04-08 Skinetta Pac-Systeme Kiener Gmbh & Co. Device for welding and/or combined cutting and welding of films
WO2003047978A1 (en) 2001-12-05 2003-06-12 Tetra Laval Holdings & Finance S.A. Sealing unit
EP1452451A1 (en) * 2001-12-05 2004-09-01 Tetra Laval Holdings & Finance S.A. Sealing unit
EP1452451A4 (en) * 2001-12-05 2008-12-24 Tetra Laval Holdings & Finance Sealing unit
US7631473B2 (en) * 2004-09-21 2009-12-15 Nalle Iii Thomas A Cutter-sealer for cutting and sealing polymer sheets
DE102007013197A1 (en) * 2006-11-10 2008-05-15 Beck Packautomaten Gmbh & Co. Sheets separation and sealing device for use in foil packaging machine, has differentiated heat conductive- and/or heat insulating units causing higher separation temperature in cutting device during heating operating bar
DE102007013198A1 (en) * 2006-11-10 2008-05-15 Beck Packautomaten Gmbh & Co. Sheets thermal separation device for use in sheet packaging machine, has work bar with receiver elements from base plate and insertion body with longitudinal grooves, which supplements to receiver hollow space for heating device
US20180273217A1 (en) * 2015-01-08 2018-09-27 Colgate-Palmolive Company Devices and Methods for Making a Pouch

Similar Documents

Publication Publication Date Title
EP0705681A1 (en) Heat-sealing apparatus
EP3157733B1 (en) Method and device for heat-sealing a lid onto the rim of a glass
EP0424226B1 (en) Packaging machine for closing packaging trays or the like after they have been filled, by means of a thermoplastic sealing film
FR2690412A1 (en) Sequential packaging appts. using plastic film - has enclosing film welded and cut to form discrete packages by thermostatically controlled hot bars.
FR3030459A3 (en) VERTICAL PACKING MACHINE
FR2598963A1 (en) DEVICE FOR WELDING A TIP ON A THERMOPLASTIC FILM
FR2466398A1 (en) HEATING DEVICE FOR HEATING COLD GLUE, IN PARTICULAR FOR LABELING MACHINES
FR2526706A1 (en) APPARATUS FOR MANUFACTURING TUBULAR SHEATHES OF PLASTIC MATERIAL FOR APPLICATION TO CONTAINERS
BE502366A (en)
EP1793027B1 (en) Device for positioning a moving transport belt in a machine for the thermal treatment of yarns
FR2634416A1 (en) WELDING OSCILLATING WELDING ASSEMBLY FOR THERMOSOUDING THERMOPLASTIC FILM AND HORIZONTAL PACKAGING MACHINE FOR PACKAGING OBJECTS IN THERMOPLASTIC FILM HAVING SUCH AN OSCILLATING ASSEMBLY
EP0267937B1 (en) Device for welding and perforating a thermoplastic film backfolded on itself
EP1114714A2 (en) Process and apparatus for butt welding by the use of a floating hot plate
EP0248715A1 (en) Apparatus for cutting straps encircling packages, particularly coils and packets of iron sheets
FR2537054A1 (en) WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS
WO1994003876A1 (en) Automatic dispenser for the delivery of hot food products
EP1485294B1 (en) Machine that is used to heat seal different containers
FR2648783A1 (en) METHOD FOR PACKAGING VARIOUS ARTICLES USING STRETCHABLE PLASTIC FILM AND MACHINE FOR CARRYING OUT SAID METHOD
FR2494212A1 (en) Automatic wrapper for bread loaves - has conveyor to side of roll of sheet with cutting and welding gear on pivoted arm
EP0908384A1 (en) Apparatus for strapping an article or a group of articles with a thermoplastic strap
EP1220783A1 (en) Device for sealing various containers
EP0156718B1 (en) Wrapping method and machine, especially for fruits and vegetables in a foil of plastic material
FR2628963A1 (en) Heater for coffee machine with cylindrical water chamber - has chamber between upper fixed and lower mobile elements joined by airtight flat washer
FR2584678A1 (en) Device for the closure of a package made from heat-sealable material
WO2011098741A1 (en) Machine for sealing tubes made of a weldable plastic material

Legal Events

Date Code Title Description
ST Notification of lapse