WO1996001180A1 - Sealing of sheet material - Google Patents

Sealing of sheet material Download PDF

Info

Publication number
WO1996001180A1
WO1996001180A1 PCT/GB1995/001318 GB9501318W WO9601180A1 WO 1996001180 A1 WO1996001180 A1 WO 1996001180A1 GB 9501318 W GB9501318 W GB 9501318W WO 9601180 A1 WO9601180 A1 WO 9601180A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
sheet
sheet material
conjunction
roller
Prior art date
Application number
PCT/GB1995/001318
Other languages
French (fr)
Inventor
Claudio Moeder
Original Assignee
Fra.Mo Snc Di Franca Riva & C.
Wharton, Peter, Robert
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 Fra.Mo Snc Di Franca Riva & C., Wharton, Peter, Robert filed Critical Fra.Mo Snc Di Franca Riva & C.
Priority to AU26263/95A priority Critical patent/AU2626395A/en
Publication of WO1996001180A1 publication Critical patent/WO1996001180A1/en

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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/007—Forming single grooves or ribs, e.g. tear lines, weak spots
    • 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
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial 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
    • B29C66/436—Joining sheets for making articles comprising cushioning or padding materials, the weld being performed through the cushioning material, e.g. car seats
    • 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
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • 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
    • B29C66/91643—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 following a heat-time profile
    • B29C66/91645—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 following a heat-time profile by steps
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one 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
    • 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
    • B29C65/02—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
    • B29C65/26—Hot fluid
    • 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
    • B29C66/81463—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 plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/81463—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 plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—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 plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/91423—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 using joining tools having different temperature zones or using several joining tools with 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00—Articles with hollow walls

Definitions

  • This invention relates to the sealing of sheet material and more particularly relates to the sealing of alveolate plastics sheet material, such as corrugated or I-beam structured material.
  • Corrugated plastics sheet material in which two plastics material films are separated by a corrugated film or flutes, are very useful in the manufacture of packaging for, in particular, food products such as fruit and vegetables.
  • Such materials have the advantage of being light in weight, relatively rigid, and resistant to moisture.
  • edge sealing of the sheet material was carried out, after cutting and creasing a blank in the conventional manner, by a relatively complicated process involving heated elements and moulding to "squash" the softened areas into the final sealed form.
  • An alternative proposal involves the use of an ultrasonic electrode, but this is relatively slow particularly if the material is strong.
  • the invention seeks to provide a method of sealing the edges of corrugated plastics sheet material which is faster and more convenient than methods used hitherto.
  • a method of sealing a corrugated plastics sheet material which comprises feeding the sheet through a pair of rollers, at least one of which is profiled, in conjunction with the application of heat, to pre-deform the sheet and thereafter to effect sealing.
  • the profiled roller has a toothed profile but a smoother profile such as a sine wave profile may also be used.
  • the sealing step may be carried using ultrasonic welding, heat sealing, or the like.
  • the use of the roller arrangement to pre-deform the sheet and partially form the necessary sealing ensures that the subsequent sealing step can be rapidly completed in a very short space of time even with relatively strong materials.
  • the ultrasonic electrode or other means of sealing is preferably employed in conjunction with a further profiled wheel or roller and preferably the orientation of the profiled wheels relative to one another is such as to eliminate gaps to produce a complete seal.
  • the seal may be applied along the edge of the sheet material.
  • the sealing may be applied between the edges, e.g. along a crease line, in which case the pattern on the material produced by the profiled configuration of the wheel allows the crease to act very well as a 'hinge', allowing easy folding.
  • Figure 1 is a diagrammatic elevational view of a system for sealing in accordance with the invention
  • Figures 2 (a) -(c) illustrate various profiles of wheel
  • Figure 3 is a partial perspective view of a corrugated sheet material sealed in accordance with the invention.
  • Figure 4 is a similar view to Figure 1 of another system
  • Figure 5 is a section on line A-A in figure 4.
  • Figure 6 is a section on line B-B in figure 4.
  • Figure 7 is a diagrammatic side view of another embodiment
  • Figure 8 is a similar view to Figure 7 of a further embodiment.
  • Figure 9 is a diagrammatic sectional view of a sealing line.
  • a corrugated plastics material sheet 10 for example of the type discussed in EP-A-0 339 593, is sealed in accordance with the invention by passing it firstly through a pair of rollers 12, 14 at least one of which is profiled.
  • the top roller 12 only is profiled as illustrated in figure 2(a) or 2(c).
  • the lower roller 14 can have a corresponding profile as illustrated in figure 2(b).
  • the roller 12 is heated, preferably to a temperature between 65°C and 250°C by means of a convenient heating element 16.
  • the temperature to which the roller is heated will depend on the speed of through-put of the sheet 10: the greater the speed of through-put, the higher the temperature the roller 12 needs to be since the contact time of the profile with the plastics sheet will be lesser.
  • the sheet After leaving the rollers 12,14, the sheet passes over a further profiled roller 18 in close conjunction with an ultrasonic electrode 20.
  • the profile of the roller 18 may be as illustrated in the upper portion of figures 2 (a) -(c) and may be the same as the profile of roller 12 or complementary thereto. Alternatively, the profile may be smooth to produce a flat seal, which is particularly useful if the seal is to act as a 'hinge'.
  • the profile of roller 12 may be as shown in figure 2(c) whereas the profile of roller 18 may be as shown in figure 2(a) (upper part) . It is preferred that the relative dispositions of the profiles of roller 12 and 18 is controlled and is maintained so that, in effect, the profiles on the roller 18 fill in the gaps left between the profiles produced by the roller 12. In this way an airtight seal is produced.
  • the sheet material 10 comprises upper and lower surfaces 22,24 separated by vertical "corrugations" 26.
  • the form of sealing produced by a roller 12 of the type illustrated in figure 2(a) is indicated at 28.
  • a seal 28 transverse to the corrugations 26 would be of even greater importance in sealing the interior of the sheet 10.
  • the method of the invention adapts itself to continuous production since the in-line-of-production edges can be sealed as the sheet moves through the production line, and any transverse sealing can be done by moving the sheet sideways through the apparatus described above.
  • the sheet 10 has a criss ⁇ cross internal profile such as discussed in PCT publication no. 091/16243.
  • the sheet After passing the first profile roller 12 the sheet is permanently deformed to a section as illustrated in Figure 5. It then passes to a double roller assembly in which the first roller 18 is profiled but the second 30 is smooth.
  • a 'Sonotrode' ultrasonic electrode 20 softens the material as before.
  • Figure 6 illustrates the section produced, in which the top layer of the sheet is locally welded to the bottom layer in the area of the seal 28. This 'flat' seal is useful where the sheet is to be hinged about the seal to form a bend in making the eventual container.
  • Figure 7 illustrates an embodiment where a number of rollers are employed in a heating zone 30 locally to reduce the thickness of the alveolate sheet 10 culminating in the rollers 12, 14. Thereafter the sheet 10 moves into a cooling zone 32 where a series of rollers 34 cool and compact the seal line.
  • the rollers in the heating zone 30 are temperature controlled to different temperatures to smoothly deform the sheet 10 and control its temperature accurately.
  • the rollers contain heating elements 36 for this purpose.
  • the rollers 34 have conduits 38 carrying cooling fluid.
  • Figure 8 shows a modified form of the apparatus of Figure 7 in which a separate heating zone 40 is provided.
  • a separate heating zone 40 In this one or more plates 42 heated by means of steam, oil or electrical elements pre-heats the sheet 10, or a hot air nozzle is used.
  • the profiled rollers 12 then need no heating element and may have the section shown in the figure.
  • the cooling and compacting zone is as before.
  • the outer layer of the sheet 10 is taken to a temperature close to its melting point so that it can be thermoformed by the rollers.
  • This apparatus can follow any desired shape of sealing line in a continuous process, provided that the minimum angle required is not below about 25°.
  • Figure 9 illustrates a typical sealing line profile.

Abstract

A method of sealing a corrugated platics sheet material which comprises feeding the sheet through a pair of rollers, at least one of which is profiled, e.g. toothed, in conjunction with the application of heat, to pre-deform the sheet, and thereafter effecting sealing by the use of, e.g., an ultrasonic electrode. The latter is employed in conjunction with a further toothed wheel, and the orientation of the toothed wheels relative to one another is such as to eliminate gaps to produce a complete seal.

Description

SEALING OF SHEET MATERIAL
This invention relates to the sealing of sheet material and more particularly relates to the sealing of alveolate plastics sheet material, such as corrugated or I-beam structured material.
Corrugated plastics sheet material, in which two plastics material films are separated by a corrugated film or flutes, are very useful in the manufacture of packaging for, in particular, food products such as fruit and vegetables. Such materials have the advantage of being light in weight, relatively rigid, and resistant to moisture.
However, in order to obtain the maximum advantage from using this sort of material it is preferable to ensure that the material is sealed around all of the edges. This has several advantages. It can prevent bacteria from contaminating air within the corrugated material; it prevents moisture from being trapped inside the material which, apart from contamination, can also alter the tare; and where recycled materials are employed in the centre of the corrugated sheet, sealing around the edges ensures that recycled material cannot come into contact with food (the food contacting film being made from virgin material) . In addition, sealing the sheet traps air within it which acts as a cushion and increases both the rigidity and the shock absorbtion characteristics of the product.
Previously, such edge sealing of the sheet material was carried out, after cutting and creasing a blank in the conventional manner, by a relatively complicated process involving heated elements and moulding to "squash" the softened areas into the final sealed form. An alternative proposal involves the use of an ultrasonic electrode, but this is relatively slow particularly if the material is strong.
The invention seeks to provide a method of sealing the edges of corrugated plastics sheet material which is faster and more convenient than methods used hitherto.
According to the present invention there is provided a method of sealing a corrugated plastics sheet material which comprises feeding the sheet through a pair of rollers, at least one of which is profiled, in conjunction with the application of heat, to pre-deform the sheet and thereafter to effect sealing.
Preferably, the profiled roller has a toothed profile but a smoother profile such as a sine wave profile may also be used. The sealing step may be carried using ultrasonic welding, heat sealing, or the like.
The use of the roller arrangement to pre-deform the sheet and partially form the necessary sealing ensures that the subsequent sealing step can be rapidly completed in a very short space of time even with relatively strong materials. The ultrasonic electrode or other means of sealing is preferably employed in conjunction with a further profiled wheel or roller and preferably the orientation of the profiled wheels relative to one another is such as to eliminate gaps to produce a complete seal.
The seal may be applied along the edge of the sheet material. Alternatively, the sealing may be applied between the edges, e.g. along a crease line, in which case the pattern on the material produced by the profiled configuration of the wheel allows the crease to act very well as a 'hinge', allowing easy folding.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a diagrammatic elevational view of a system for sealing in accordance with the invention;
Figures 2 (a) -(c) illustrate various profiles of wheel;
Figure 3 is a partial perspective view of a corrugated sheet material sealed in accordance with the invention;
Figure 4 is a similar view to Figure 1 of another system;
Figure 5 is a section on line A-A in figure 4;
Figure 6 is a section on line B-B in figure 4;
Figure 7 is a diagrammatic side view of another embodiment;
Figure 8 is a similar view to Figure 7 of a further embodiment; and
Figure 9 is a diagrammatic sectional view of a sealing line.
Referring to the drawings, and in particular Figures 1 to 3 , a corrugated plastics material sheet 10, for example of the type discussed in EP-A-0 339 593, is sealed in accordance with the invention by passing it firstly through a pair of rollers 12, 14 at least one of which is profiled. As illustrated, the top roller 12 only is profiled as illustrated in figure 2(a) or 2(c). However, if desired, the lower roller 14 can have a corresponding profile as illustrated in figure 2(b). The roller 12 is heated, preferably to a temperature between 65°C and 250°C by means of a convenient heating element 16. The temperature to which the roller is heated will depend on the speed of through-put of the sheet 10: the greater the speed of through-put, the higher the temperature the roller 12 needs to be since the contact time of the profile with the plastics sheet will be lesser. After leaving the rollers 12,14, the sheet passes over a further profiled roller 18 in close conjunction with an ultrasonic electrode 20. The profile of the roller 18 may be as illustrated in the upper portion of figures 2 (a) -(c) and may be the same as the profile of roller 12 or complementary thereto. Alternatively, the profile may be smooth to produce a flat seal, which is particularly useful if the seal is to act as a 'hinge'.
In one preferred embodiment, the profile of roller 12 may be as shown in figure 2(c) whereas the profile of roller 18 may be as shown in figure 2(a) (upper part) . It is preferred that the relative dispositions of the profiles of roller 12 and 18 is controlled and is maintained so that, in effect, the profiles on the roller 18 fill in the gaps left between the profiles produced by the roller 12. In this way an airtight seal is produced.
As can be seen from figure 3 the sheet material 10 comprises upper and lower surfaces 22,24 separated by vertical "corrugations" 26. The form of sealing produced by a roller 12 of the type illustrated in figure 2(a) is indicated at 28. Naturally, a seal 28 transverse to the corrugations 26 would be of even greater importance in sealing the interior of the sheet 10. The method of the invention adapts itself to continuous production since the in-line-of-production edges can be sealed as the sheet moves through the production line, and any transverse sealing can be done by moving the sheet sideways through the apparatus described above.
Referring now to Figures 4 to 6, a system similar to figure 1 is illustrated and like numerals will be used for like parts. As can be seen from Figures 5 and 6, the sheet 10 has a criss¬ cross internal profile such as discussed in PCT publication no. 091/16243. After passing the first profile roller 12 the sheet is permanently deformed to a section as illustrated in Figure 5. It then passes to a double roller assembly in which the first roller 18 is profiled but the second 30 is smooth. A 'Sonotrode' ultrasonic electrode 20 softens the material as before. Figure 6 illustrates the section produced, in which the top layer of the sheet is locally welded to the bottom layer in the area of the seal 28. This 'flat' seal is useful where the sheet is to be hinged about the seal to form a bend in making the eventual container.
Figure 7 illustrates an embodiment where a number of rollers are employed in a heating zone 30 locally to reduce the thickness of the alveolate sheet 10 culminating in the rollers 12, 14. Thereafter the sheet 10 moves into a cooling zone 32 where a series of rollers 34 cool and compact the seal line. The rollers in the heating zone 30 are temperature controlled to different temperatures to smoothly deform the sheet 10 and control its temperature accurately. The rollers contain heating elements 36 for this purpose. The rollers 34 have conduits 38 carrying cooling fluid.
Figure 8 shows a modified form of the apparatus of Figure 7 in which a separate heating zone 40 is provided. In this one or more plates 42 heated by means of steam, oil or electrical elements pre-heats the sheet 10, or a hot air nozzle is used. The profiled rollers 12 then need no heating element and may have the section shown in the figure. The cooling and compacting zone is as before. The outer layer of the sheet 10 is taken to a temperature close to its melting point so that it can be thermoformed by the rollers. This apparatus can follow any desired shape of sealing line in a continuous process, provided that the minimum angle required is not below about 25°. Figure 9 illustrates a typical sealing line profile.
It will be appreciated that many different profiles of roller could be employed within the scope of the invention.

Claims

1. A method of sealing an alveolate plastics sheet material which comprises feeding the sheet through a pair of rollers, at least one of which is profiled, in conjunction with the application of heat, to pre-deform the sheet, and thereafter effecting sealing.
2. A method as claimed in claim 1 wherein the sealing is effected by ultrasonic welding or by heat.
3. A method as claimed in claim 2 wherein an ultrasonic electrode is employed in conjunction with a further toothed wheel.
4 A method as claimed in claim 3 in which the orientation of the toothed wheels relative to one another is such as to eliminate gaps to produce a complete seal.
5. A method as claimed in any of claims 1 to 4 in which the seal is applied along the edge of the sheet material.
6. A method as claimed in any of claims 1 to 4 in which the sealing is applied between the edges along a crease line.
7. A method as claimed in any of claims 2 to 6 in which an ultrasonic electrode is employed in conjunction with a smooth roller.
8. A method of sealing a corrugated plastics sheet material substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
PCT/GB1995/001318 1994-07-06 1995-06-07 Sealing of sheet material WO1996001180A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26263/95A AU2626395A (en) 1994-07-06 1995-06-07 Sealing of sheet material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9413644.7 1994-07-06
GB9413644A GB9413644D0 (en) 1994-07-06 1994-07-06 Sealing of sheet material

Publications (1)

Publication Number Publication Date
WO1996001180A1 true WO1996001180A1 (en) 1996-01-18

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Country Status (3)

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AU (1) AU2626395A (en)
GB (1) GB9413644D0 (en)
WO (1) WO1996001180A1 (en)

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WO1997034506A1 (en) * 1996-03-15 1997-09-25 Cera France Compagnie D'equipement Robotique Appliquee Ruffling slide and method for making same
EP1177878A1 (en) * 1999-11-17 2002-02-06 Pearl Kogyo Co., Ltd Method and device for forming linear groove in car skin air bag
WO2002085604A1 (en) * 2001-04-20 2002-10-31 Aristo Graphic Systeme Gmbh & Co. Kg Device and method for slotting or folding homogeneous, multilayer plastic materials or plastic materials that are reinforced by crosspieces on processing plotters
EP1879162A1 (en) 2006-07-03 2008-01-16 Werner Achilles GmbH & Co. KG Foldable product and method for manufacturing a product refined with plastic film
US8858737B2 (en) 2009-06-08 2014-10-14 Daido Metal Company Ltd. Aluminum-based sliding alloy and casting apparatus for the same
WO2015086679A1 (en) * 2013-12-12 2015-06-18 Gosset François Method for producing a line of least resistance on a plastic film
US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034506A1 (en) * 1996-03-15 1997-09-25 Cera France Compagnie D'equipement Robotique Appliquee Ruffling slide and method for making same
EP1177878A1 (en) * 1999-11-17 2002-02-06 Pearl Kogyo Co., Ltd Method and device for forming linear groove in car skin air bag
EP1177878A4 (en) * 1999-11-17 2007-01-17 Pearl Kogyo Co Ltd Method and device for forming linear groove in car skin air bag
WO2002085604A1 (en) * 2001-04-20 2002-10-31 Aristo Graphic Systeme Gmbh & Co. Kg Device and method for slotting or folding homogeneous, multilayer plastic materials or plastic materials that are reinforced by crosspieces on processing plotters
EP1879162A1 (en) 2006-07-03 2008-01-16 Werner Achilles GmbH & Co. KG Foldable product and method for manufacturing a product refined with plastic film
US8858737B2 (en) 2009-06-08 2014-10-14 Daido Metal Company Ltd. Aluminum-based sliding alloy and casting apparatus for the same
WO2015086679A1 (en) * 2013-12-12 2015-06-18 Gosset François Method for producing a line of least resistance on a plastic film
FR3014729A1 (en) * 2013-12-12 2015-06-19 Francois Gosset METHOD FOR MAKING A LINE OF LESS RESISTANCE ON A PLASTIC FILM
US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method
US11325760B2 (en) 2014-07-16 2022-05-10 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

Also Published As

Publication number Publication date
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GB9413644D0 (en) 1994-08-24

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