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
  • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
  • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
  • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
  • B29C65/787—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains
  • B29C65/7873—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains using cooperating conveyor belts or cooperating conveyor chains
• • 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
  • B29C65/26—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
  • 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
  • B29C65/7435—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 the tool being a roller
• • 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
  • B29C66/032—Mechanical after-treatments
• • 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
  • B29C66/05—Particular design of joint configurations
  • B29C66/304—Joining through openings in an intermediate part of the article
• • 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
• • 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
  • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
• • 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
  • B29C66/814—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
  • B29C66/80—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
  • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
  • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/80—General aspects of machine operations or constructions and parts thereof
  • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
  • B29C66/818—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
  • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
  • B29C66/822—Transmission mechanisms
  • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
• • 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
  • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/80—General aspects of machine operations or constructions and parts thereof
  • B29C66/84—Specific machine types or machines suitable for specific applications
  • B29C66/849—Packaging machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
  • B65B51/10—Applying or generating heat or pressure or combinations thereof
  • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
  • B65B51/32—Cooling, or cooling and pressing, package closures after heat-sealing

Definitions

• the present invention relates to a method and a device for both seal ⁇
• thermoplastic material whereby the packages display two opposite walls, and separation of superfluous packaging material from the 5 sealed packages.
• the invention relates to sealing the packages by welding them together in ribbon-shaped regions close to the openings of the packages, and thereafter separating superfluous material from the packages.
• US Patent No. 4 260 447 reveals a device for sealing plastic bags, 10 where the latter are introduced by their upper portion between two pairs of V-belts, between which the walls of the bag are fixed, whereby the walls of the bag are uncovered in the space between the pairs of V-belts, and thereby accessible for heating and welding to ⁇ gether.
• a contact pressure is 15 achieved between the walls of the bags in a heated region in that a wheel with a peripheral flange displaces the material at right-angles to the direction of displacement of the bags.
• the weld is then cooled and a knife cuts away excess material by means of a cut in the actual weld.
• the purpose of the present invention is to achieve an improved method 25 and an improved device for sealing filled packages of thermoplastic material.
• the invention makes it possible to achieve a completely wrinklefree seal.
• fig. 1 shows a belt viewed from the side
• fig. 2 shows an enlarged detail of the marked region II-II in fig. 1,
• fig. 3 shows a device in accordance with the invention viewed from above
• fig. 4 shows the section IV-IV in fig. 3
• figs. 5 - 8 show the sections V-V, VI-VI, VII-VII and VIII-VIII in fig. 3 and
• fig. 9 shows an enlarged detail of the region marked by IX in fig. 7.
• Figs. 1 and 2 disclose a section of a continous belt 1 of thermo ⁇ plastic material with a number of packages 2.
• the belt has been formed by folding a wider belt of material along its centre line 3 for the formation of the bottom portion 4 of the packages which in figure 1 is shown in an embodiment with a folded-in bottom during the formation of the lower edge 38 of the belt.
• the opposite walls 5,6 obtained by folding are joined to one another at regular intervals for the formation of connection zones 7,8 which extend at right- -angles to the bottom portion 4 of the packages.
• the connection zones 7,8 which extend at right- -angles to the bottom portion 4 of the packages.
• OA ⁇ PI zones which can be formed by welding or glueing or by some other suitable manner, delimit each package laterally and extend from the bottom portion 4 up to an upper site that is located at a predeter ⁇ mined distance from the upper edge 9 of the belt.
• the continous belt further includes two longitudinal edge portions 10,11 which comprise the upper regions of the walls obtained by folding.
• each slotted portion in certain embodi ⁇ ments is interrupted by one or more flaps 15 that retain the packages in a continous line.
• horizontal slotted portions 16 are disposed in the region of the transition between the packages and the upper edge portions 10,11, whereby these horizontal slotted portions 16 are located next to the vertical slotted portions 14 and are joined thereto in the shape of a T.
• two adjacent horizontal slotted portions 16 are disposed at a distance from one another.
• the slotted portions are disposed in the two walls 5,6.
• Figures 1 and 2 further show the two wall portions 10,11, formed in their upper edges with double walls of material 17,18 which have been formed in that the belt of material before passing into a seal ⁇ ing device in accordance with the invention, has been disposed with tunnel-shaped support devices which had interacted with special guide devices over which the tunnel-shaped support devices slid as the belt passed by a filling station.
• the tunnel -shaped support devices were cut open, whereby the double material walls 17,18 shown in the figure were produced.
• the embodiment with double material walls is on its own account only of importance in the application of the invention in
• Fig. 2 shows in dashed lines ribbon-shaped regions 12,19 in which the material walls in a belt in a device in accordance with the invention are heated in order for the walls to be welded together, and the packages thereby sealed.
• the reference designation 120 further indi ⁇ cates the welded region which thus occurs, and the reference designa ⁇ tion 121 a central region of this welded region. In the central region the material thickness has been reduced after welding together of the walls in that material has been moved to one side.
• the central region 121 either separates the filled and sealed packages from the longitudinal edge portions 10,11 or causes sufficient weakening of the connection between the packages and the edge portions so that a later separation should easily be able to take place by simply pulling apart the packages and the edge portions. Once the central region 121 is formed the sealed package is in principle completed.
• Figures 3-9 disclose a frame 42 on which there are disposed next to one another drive wheels 43,44 for both two retaining ribbons 80 and 81 forming endless loops, and two pressing ribbons 40 and 41 of e.g.
• the retaining ribbons and pressing ribbons turn over their own trailing wheel 85,86 and 45,46, respectively.
• the retaining and pressing ribbons form pairwise loop portions 800, 810 and 400, 410, respectively, that run parallel to one another, and at a distance from one another adapted to the thickness of the material belt in order to fix the belt under a certain compression of the material therein.
• the retaining and pressing ribbons are further so located that a smaller distance is formed between adjacent retaining and pressing ribbons. In the figures the retaining ribbons are shown located below the pressing
• the peripheries of the contact surfaces for the retaining ribbons, and the pressing ribbons, and the rotational speeds of the wheels are so selected that the speeds agree in the loop portions 800, 810 and 400, 410, respectively, of the re- 5 taining ribbons and pressing ribbons.
• the direction of rotation of the drive wheels 43,44 is so selected that the pressing ribbons in the parallel loop portions 400,410 are displaced from the trailing wheels 45,46 towards the drive wheels.
• the frame is preferably designed with two plates 422,423 level with
• the heating and welding devices hereinafter termed welding devices, 50,51 are disposed on each side of the loop portions 400, 410 of the pressing ribbons 40,41 that run parallel to one another.
• the welding 0 devices are further journalled for motion towards one another during enclosure of the pressing ribbons.
• the welding devices have a continous shape along the loop portions 400, 410 ' , and are rotatably journalled in journalling de ⁇ vices 54,55 in the vicinity of the ends that are located nearest the 5 trailing wheels 45,46.
• the welding devices are pressed against one another by means of springs 52,53.
• the welding devices are disposed with ducts 500,510 for a heating fluid. Other known heating devices are also applicable within the scope of the invention.
• the separating devices comprise in the embodiment shown two free-running wheels 64,65 which are ' pressed against one another by a spring 62 during enclosure of small regions of the loop portions
• One of these wheels has preferably a slightly rounded peripheral surface 640 while the other has prefera ⁇ bly a relatively narrow peripheral surface 650 for interaction with the rounded surface.
• at least one of the pulleys is replaced by a stationary mechanical device with an anti-
• cooling devices 70,71 are disposed immediately after the separating devices in the direction of motion of the loop portions 400,410.
• the cooling devices are also pressed against one another by means of springs 72,73 during enclo ⁇ sure of the pressing ribbons (cf fig. 8).
• the cooling devices are disposed with cooling ducts 700,710 for conduction of thermal energy from the cooling devices and the heated thermoplastic material.
• the retaining ribbons 80,81 are located with their loop portions 800,810 in preferably continous grooves 420,421 disposed in support plates 425,426 attached to plates 422,423 in the frame and located close to the continous aperture 424.
• a number of springs 47,48 are disposed in the grooves in order to press the loop portions 800,810 against one another during enclosure of the material in the belt of blanks and fixing of the latter.
• Fig. 3 further shows a belt 1 passing into the device in the ⁇ ' ght- -hand section of the figure and sealed packages emerging from the device in the left-hand part of the figure.
• a belt 1 is inserted between the retaining ribbons 80,81 (cf fig. 5) which press the material walls of the belt against one another and fix the belt.
• the retaining ribbons are displaced successive portions of the belt are continously drawn into the device.
• the longitudinal edge portions 10,11 are inserted between the pressing ribbons 40,41 which enclose the edge portions and during continuing motion insert the enclosed edge portions between the welding devices 50,51.
• the welding devices displace the pressing ribbons against one another whilst simultaneous fixing the material in the belt and heat ⁇ ing the material in the ribbon-shaped regions 12,19.
• the journal ling of the welding devices and the design of their contact surfaces against the pressing ribbons ensure that the force for compressing material walls is at its greatest when the belt is in the final stage of its passage of the welding devices, which in turn ensures a secure and reliable welding together of the material walls for the realisation of the ribbon-shaped welded region 120.
• OMPI - distance between the pressing ribbons is reduced preferably to an extent causing the pressing ribbons to abut one another.
• the still warm material in the ribbon-shaped welded region 120 is thus dis ⁇ placed into the central part 121 of the region, at the same time as the sealing of the package which the welded region has made is re ⁇ tained intact.
• the filled and sealed packages are thus separated from the longitudinal edge portions 10,11, whereby the sealed package is in principle completed. Alternatively, there remains such a weak con ⁇ nection to the longitudinal edge portions 10,11 that a later separa- tion is achieved if the packages and the edge portions are drawn apart.
• the belt With retained fixing of the blank walls in the welded region, the belt is moved in between the cooling devices 70,71 where the material in the weld region is cooled down to primarily room temperature.
• the completed packages and the normally separated edge portions 10,11 then leave the device when the pressing ribbons and the retaining ribbons relax their grip around the separated edge portions and the sealed packages respectively.
• the edge portions are then preferably wound onto rollers while the completed packages, preferably supported by a conveyor belt, are carried away from the device.
• the fixing of the material walls which is achieved by the retaining ribbons 80,81 in combination with the pressing ribbons 40,41 ensures that as the material belt passes through the device the distribution which the material has in the belt when the material in conjunction with its insertion in the device is fixed between the retaining ribbons 80,81 and the pressing ribbons 40,41, is primarily retained.
• This fixing ensures that any possible internal stresses that have been built into the material in conjunction with its passage through the device are not allowed to deform the weld or the region around it. As the material cools down to room temperature the internal stresses are "frozen" and the potential of the material for permanent changes in shape ceases.
• the pressing devices also operate as forming devices that ensure an even residual weld for sealing the package as the separating device displaces material in the ribbon-shaped welded ' region.
• the device described here ⁇ tofore is preceded by devices (e.g. a filling device of the type that is described in the international application PCT/SE81/00187 with publication No. WO 82/00129) which cause the material in the belt to be subjected to stretching forces, at least in the vicinity of the longitudinal edge portions of -the belt, thereby obtaining a certain longitudinal extension in the belt in conjunction with its insertion into the device.
• devices e.g. a filling device of the type that is described in the international application PCT/SE81/00187 with publication No. WO 82/00129
• Embodiments of the invention have been described above in which the material in the packages is stretched in the direction of movement of the packages prior to insertion in the device.
• the idea of the inven ⁇ tion as such is however not restricted to the direction of stretching described but is also applicable in the case of other directions of stretching.

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

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• 1982
  • 1982-09-30 SE SE8205570A patent/SE453741B/sv not_active IP Right Cessation
• 1983
  • 1983-09-26 EP EP83903115A patent/EP0120898A1/en not_active Withdrawn
  • 1983-09-26 WO PCT/SE1983/000335 patent/WO1984001351A1/en unknown

Non-Patent Citations (1)

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