WO2006041377A1 - A method and an apparatus in ultrasonic sealing - Google Patents

A method and an apparatus in ultrasonic sealing Download PDF

Info

Publication number
WO2006041377A1
WO2006041377A1 PCT/SE2005/001451 SE2005001451W WO2006041377A1 WO 2006041377 A1 WO2006041377 A1 WO 2006041377A1 SE 2005001451 W SE2005001451 W SE 2005001451W WO 2006041377 A1 WO2006041377 A1 WO 2006041377A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact surface
primary contact
primary
anvil
packaging material
Prior art date
Application number
PCT/SE2005/001451
Other languages
French (fr)
Inventor
Per Johansson
Klas Haglund
Björn BÖCKERMAN
Original Assignee
Tetra Laval Holdings & Finance S.A.
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 Tetra Laval Holdings & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Publication of WO2006041377A1 publication Critical patent/WO2006041377A1/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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/081—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations having a component of vibration not perpendicular to the welding surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/81419—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 and flat
    • 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
    • B29C66/81425—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 stepped, e.g. comprising a shoulder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/81421—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
    • B29C66/81423—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 concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis

Definitions

  • the present invention relates to a method and an apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure and displaying an overlap joint extending along the longitudinal direction of the tubular packaging material.
  • ultrasonic sealing One prior art method of sealing together packaging material comprising fibres and plastic or plastic laminates is so-called ultrasonic sealing.
  • the material layers which are to be sealed together are clamped between an ultrasonic horn and an anvil.
  • the ultrasonic horn vibrates the material and, because of different types of hysteresis losses in the material and in the interface between the materials, the material will be heated so that the plastic partly melts and, because of the compression, is welded together.
  • This basic method is commercially employed and well-known to a person skilled in the art and will not, therefore, be described in greater detail.
  • a longitudinal overlap joint may create problems in the transverse sealing of a tubular packaging material.
  • Such a longitudinal joint occurs when the tube is formed in that two parallel edges are sealed together after the one edge has been placed on the outside of the material adjacent the other edge.
  • These problems entail int. al. that there occurs at the overlap joint a portion of increased material thickness, which may result in the sealing tools (i.e. the ultrasonic horn and the anvil) becoming unstable and risking destroying the seal, or that this excess material deforms and/or weakens the seal.
  • the sealing tool i.e. the ultrasonic horn and the anvil
  • the tube clamped together for sealing will display a thickness of 2t, but locally at the overlap joint a thickness of 3t.
  • the object of the present invention is thus to obviate or overcome the above- outlined drawbacks within the prior art technology and to realise a method and an apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure and displaying an overlap joint extending along the longitudinal direction of the tubular packaging material.
  • the apparatus comprises an ultrasonic horn with an elongate primary contact surface and an anvil with an elongate primary contact surface intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a tubular packaging material clamped between them, the actively cooperating primary contact surfaces in primary sealing displaying at least two levels of active primary contact surfaces disposed, on abutment of the tubular packaging material, to enter into operative engagement in sequence.
  • the first abutting level further displays a constant height throughout its entire extent and the step difference between the first abutting level and the last abutting level is less than the thickness of the packaging material.
  • the effect which the ultrasonic horn exercises against the packaging material for forming the primary seal will be able to be controlled in a favourable and repeatable manner.
  • the first abutting level abuts the packaging material with a relatively smaller surface
  • a relatively high pressure and thereby relatively high effect will occur which locally rapidly forms a melt which spreads when the tools approach one another.
  • the second actively abutting level abuts, this offloads in that the total primary contact surface which abuts the packaging material increases, the pressure and thereby the effect being reduced so that the melting cycle is arrested somewhat.
  • the levels may be substantially planar and connected by means of inclining planes, and the second active level may display a width which exceeds the width of the first level. This accentuates the above-outlined effect reduction and involves a possibility of adjusting a thought-for balance in the effect reduction as a result of the relative width of the second primary contact surface and how the widening itself takes place.
  • the first abutting level may further display reduced width where the overlap joint is expected and the remaining levels may display recesses in association therewith.
  • the anvil may display a first elongate active primary contact surface which, along its extent, displays a constant height in a direction towards the primary contact surface of the ultrasonic horn, the anvil may display a second elongate active primary contact surface intended for cooperation with the primary contact surface of the ultrasonic horn and disposed along and in association with the first primary contact surface of the anvil, and the second primary contact surface of the anvil may be disposed on a level located at a greater distance from the primary contact surface of the ultrasonic horn than the level of the first primary contact surface of the anvil. Production, service and maintenance will hereby be rendered more economical compared with if the configuration according to the present invention had been disposed at the ultrasonic horn.
  • the total level difference between the first abutting level and the last abutting level may, in one preferred embodiment, be located in a range corresponding to from 1/3 to 2/3 of the thickness of the packaging material.
  • the anvil may also display a third elongate active primary contact surface intended for cooperation with the primary contact surface of the ultrasonic horn and disposed between the other two, along and adjacent the first primary contact surface of the anvil as well on a level located lower than the level of the first primary contact surface of the anvil and higher than the second primary contact surface of the anvil and thereby at a distance from the primary contact surface of the ultrasonic horn which is located between that of the first and that of the second level.
  • the first active primary contact surface of the anvil displays, according to one embodiment, a tapering portion for the overlap joint. The purpose of this is to reduce the material volume which is there locally displaced by the first primary contact surface.
  • recesses may be provided in the second, and, where applicable, third primary contact surface of the anvil, and these recesses may display a diverging basic form considered from the first primary contact surface of the anvil and may be located where the overlap joint is expected.
  • the transition between the adjacent active primary contact surfaces may display an angle of inclination of the order of magnitude of between 10 and 35° to achieve a more even transition for material flowing between them.
  • the walls of the recess may be disposed at an angle in relation to adjacent active primary contact surfaces which is less than 90° and preferably is of the order of magnitude of between 45 and 82°.
  • the purpose of this is to realise a material displacement of molten material to the region in the recess.
  • the ultrasonic horn and the anvil may be designed with one elongate secondary contact surface each, these secondary contact surfaces being disposed to cooperate with one another and clamp the tubular packaging material for transverse secondary sealing thereof at a predetermined distance from the transverse primary seal.
  • the apparatus is constructed to realise double transverse seals consisting of one transverse primary seal and one transverse secondary seal each. Such double transverse seals may make a package stronger and less fragile.
  • the apparatus according to the present invention as described above may be constructed so that the primary contact surface and secondary contact surface of the ultrasonic horn are substantially parallel and the primary contact surface and secondary contact surface of the anvil are substantially parallel.
  • the sealing result will be one transverse primary and one transverse secondary seal which are also substantially parallel, which is often to be preferred, not only from the point of view of manufacture and function, but also from an aesthetic perspective.
  • the apparatus is designed so that the primary contact surface and secondary contact surface of the anvil are separated by means of an elongate depression in the anvil, and the predetermined distance between the transverse primary seal and the transverse secondary seal depends upon the width of the depression. This design is relatively simple and stable from the mechanical point of view.
  • primary seal is taken to signify that transverse seal which is intended to be disposed most proximal the product in a finished package.
  • primary contact surfaces signify those contact surfaces which realise the primary seal.
  • secondary seal signifies a transverse seal which is not intended to be disposed most proximal the product in a finished package, but rather outside the primary seal.
  • secondary contact surfaces signify those contact surfaces which realise the secondary seal. It will be apparent from the description in its entirety that a primary seal may occur alone, but that a secondary seal can only occur together with a primary seal.
  • the characterising features which are discussed in connection with the apparatus according to the present invention in ultrasonic sealing may naturally be transferred to the method according to the present invention in ultrasonic sealing. Further, these characterising features may naturally be combined in one and the same embodiment.
  • FIG. 1 schematically illustrates the principle in transverse primary sealing of a tubular packaging material
  • Fig. 2 is a schematic perspective view of an anvil tool designed according to a first embodiment of the present invention
  • Fig. 3 is a schematic front elevation of the tool according to Fig. 2;
  • Fig. 4 is a schematic illustration of a detailed view taken along the section line B-B in Fig. 2;
  • Fig. 5 is a schematic illustration of a detailed view taken along the section line A-A in Fig. 2;
  • Fig. 6 is a schematic illustration of a detailed view of the area around where the overlap joint may be expected in Fig. 2;
  • Fig. 7 is a schematic front elevation of an anvil tool designed according to a second embodiment of the present invention.
  • Fig. 8 schematically illustrates a detailed view taken along the section line B-B in Fig. 7;
  • Fig. 9 is a schematic illustration of a detailed view taken along the section line A-A in Fig. 7;
  • Fig. 10 is a schematic illustration of a detailed view of the area around where the overlap joint is expected in Fig. 7.
  • Fig. 1 there is illustrated in section the principle of a sealing unit for ultrasonic sealing of a tubular packaging material 1 displaying a longitudinal overlap joint 2.
  • the plastic film in the present embodiment displays a thickness of 0.14 mm.
  • the sealing unit which is intended for primary sealing only, comprises ' an ultrasonic horn with an elongate, planar primary contact surface 3 and an anvil with an active primary contact surface 4 intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a packaging material 1 clamped between them.
  • a knife 7 is disposed to penetrate the packaging material in the zone between the primary seals 5, 5', either wholly in a continuous incision for separating the packages or intermittently or partly for imparting to the zone a tearing indication which facilitates later division and separation of the packages.
  • Figs. 2 and 3 show an anvil tool according to the present invention with double anvils intended to meet ultrasonic horns.
  • the active primary contact surfaces 4, 4' are each disposed in three steps on one side each of a groove 8 in a strip 9.
  • the knife 7 is operatively projectably disposed in the groove.
  • the strip 9, which may be an integrated part of, or realisably disposed at, the body of the anvil displays, in the present embodiment, a symmetrical topography or profile curve around the groove 8.
  • the first active plateau 4:1 displays, in the present embodiment, a tapering width within an area where the overlap joint is expected. The purpose of this is to reduce the material volume which needs to be displaced precisely there and to increase the local effect there in that the surface which abuts the packaging material is reduced.
  • the width of the plateau 4:1 tapers in that the strip displays recesses in the form of milled portions, a first milled portion 12 in the inclining surface 10 and a distance into the first plateau 4:1, and a second milled portion 13 out of the inclining surface 11, the second and third plateaux 4:2 and 4:3, as well as the inclining surfaces therebetween and partly in the first plateau 4:1.
  • a part of the first plateau 4:1 remains unaffected by the recesses, the first plateau 4:1 displaying a constant height throughout all of its extent.
  • the milled portion 13 directed towards the product space 6 is designed to diverge, its extent in a direction parallel with the primary seal increasing with the increasing distance from the first plateau 4:1.
  • the recess 13 is advantageously designed with inclining edge portions and thus not designed with edges at a right angle to the plateaux 4:1, 4:2, 4:3.
  • a part of the excess of material which, in conjunction with the recess at the primary sealing is caused to convert into fluid form, to flow into the recess and thereby fill out the regions around the overlap joint. This compensates for the shortage of material which can otherwise occur there because of the size of the recesses which is partly controlled by the need for margins in order to accommodate variations in the position of the overlap joint.
  • the levels have been described as being located at the anvil. This is also a preferred positioning, but it is also possible within the scope of the present invention to place the level profile curve with the same superior result at the horn itself or to distribute the levels between profile curves in both the horn and the anvil.
  • the sealing tool which is illustrated in Fig. 1 could be disposed for both primary sealing and secondary sealing and comprise an ultrasonic horn (not shown) with planar primary contact surfaces like those (3, 3') described above and elongate planar secondary contact surfaces, as well as an anvil 18 (shown in Fig. 7) with "step-shaped" primary contact surfaces 20, 20' like those (4, 4') described above and elongate planar secondary contact surfaces 22, 22'.
  • the primary contact surfaces 20, 20' are disposed on one side each of a groove 24 in a strip 26.
  • the primary contact surfaces are intended to cooperate with each other for the formation of transverse primary seals of a tubular packaging material which is clamped between the ultrasonic horn and the anvil.
  • the secondary contact surfaces are intended to cooperate with each other for the formation of transverse secondary seals of the tubular packaging material.
  • the result will be double seals, each one consisting of a transverse primary seal and a transverse secondary seal which are substantially parallel.
  • Figs. 8 and 9 are partial cross sections through the anvil 18 in Fig. 7, taken along the line B-B and A-A, respectively, in Fig. 7.
  • the primary contact surface 20 is designed in the same manner as the previously described primary contact surface 4 and will, therefore, not be discussed further.
  • the secondary contact surface 22 is of planar design. As is illustrated in Fig. 8 and 9, the secondary surface 22 lies flush with the uppermost plateau of the primary contact surface 20, i.e. that plateau which first comes into contact with the packaging material when the ultrasonic horn and the anvil approach one another. Consequently, the primary contact surface, along its uppermost plateau, and the secondary contact surface will come into contact with the packaging material substantially simultaneously on the introduction of the sealing cycle.
  • the primary and secondary contact surfaces 20 (20') and 22 (22') are parallel and separated by a depression 28 (28') in the strip 26. Since the primary contact surfaces realise the transverse primary seal and the secondary contact surfaces realise the transverse secondary seal, the width 30 (30') of the depression 28 (28') at the contact surfaces will define the distance between the seals. The sealing distance will, under normal use of the sealing tool, be slightly less than the width 30 of the depression because of the thermal propagation in the packaging material.
  • the secondary contact surface 22 in the present embodiment displays, as illustrated in Fig. 10, a tapering width within an area where the overlap joint of the tubular packaging material is expected.
  • the purpose of this is to reduce the material volume which needs to be displaced precisely there and to increase the effect locally there by reducing the surface which is in contact with the packaging material.
  • the tapering width is realised by means of a first recess 32 in the strip 26.
  • the strip 26 also has a second recess 34 formed partly in the primary contact surface 20 which is intended to receive the overlap joint of the tubular packaging material.
  • the second recess 34 is divergent and in the form of a step with two levels 34a, 34b. This step configuration promotes the realisation of straight seals, i.e. an even distance between the transverse primary and transverse secondary seals throughout the entire packaging material.
  • the ultrasonic horn may be designed in numerous different ways, for example with a primary contact surface and a secondary contact surface which are not separated but instead interconnected with one another in the same plane for each one of the two sealing units.
  • the relationship could be the reverse, in which event the double transverse seal could instead be obtained as a result of the design of the ultrasonic horn.
  • the transverse primary seal is step-shaped while the transverse secondary seal is planar.
  • the secondary seal could be designed in other ways, for example with a step configuration in which event the two transverse seals could be uniform.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

The present invention relates to a method and an apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure displaying an overlap joint extending along the longitudinal direction of the tubular packaging material. The method entails that an ultrasonic horn with an elongate primary contact surface and an anvil with an elongate primary contact surface, these primary contact surfaces being disposed for cooperating transverse primary sealing of a tubular packaging material clamped between them, in a first step by means of the primary contact surfaces abut the material along a first elongate active primary contact surface, and that, in a second step, after a predetermined penetration into the packaging material has been achieved, the active primary contact surface is widened increasing the area cooperating for primary sealing on further penetration. The apparatus includes an ultrasonic horn with an elongate primary contact surface (3) and an anvil with an elongate primary contact surface (4) intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a tubular packaging material (1) clamped between them, the actively cooperating primary contact surfaces (3, 4) in primary sealing displaying at least two levels of active primary contact surfaces (4.1, 4:2, 4:3) disposed, on abutment of the tubular packaging material, to enter into operative engagement in sequence, and the first abutting level (4:1) displaying a constant height throughout its entire extent, the level difference between the first abutting level (4:1) and the last abutting level (4:3) being less than the thickness (t) of the packaging material.

Description

A METHOD AND AN APPARATUS IN ULTRASONIC SEALING
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure and displaying an overlap joint extending along the longitudinal direction of the tubular packaging material.
BACKGROUND ART One prior art method of sealing together packaging material comprising fibres and plastic or plastic laminates is so-called ultrasonic sealing. In accordance with this technology, the material layers which are to be sealed together are clamped between an ultrasonic horn and an anvil. The ultrasonic horn vibrates the material and, because of different types of hysteresis losses in the material and in the interface between the materials, the material will be heated so that the plastic partly melts and, because of the compression, is welded together. This basic method is commercially employed and well-known to a person skilled in the art and will not, therefore, be described in greater detail.
It is also known in the art that a longitudinal overlap joint may create problems in the transverse sealing of a tubular packaging material. Such a longitudinal joint occurs when the tube is formed in that two parallel edges are sealed together after the one edge has been placed on the outside of the material adjacent the other edge. These problems entail int. al. that there occurs at the overlap joint a portion of increased material thickness, which may result in the sealing tools (i.e. the ultrasonic horn and the anvil) becoming unstable and risking destroying the seal, or that this excess material deforms and/or weakens the seal. If the packaging material displays a thickness t, the tube clamped together for sealing will display a thickness of 2t, but locally at the overlap joint a thickness of 3t.
Further, it is previously known in the art to provide a depression in the contact surface of the ultrasonic horn or in the anvil in order to create more space for the extra material volume of the overlap joint. This notwithstanding, there is room for improvement. In certain situations, it
"""has proved to be difficult to balance the depth and extent of the depression in order, on the one hand, to attain a sufficient level of quality in the seal and, on the other hand, to realise a sealing line which is strong from the point of view of mechanical strength and, thirdly, to cover an area within which the overlap joint may vary in position. This has proved to be particularly manifest for packaging materials of non fibre multilayer structure, plastic film. As opposed to fibrous multilayer structures, for example laminated paperboard, the non fibre multilayer structures lack the stability and volume elasticity which the fibres afford a packaging material in a sealing operation.
SUMMARY OF THE INVENTION
The object of the present invention is thus to obviate or overcome the above- outlined drawbacks within the prior art technology and to realise a method and an apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure and displaying an overlap joint extending along the longitudinal direction of the tubular packaging material.
This object is attained by means of a method and an apparatus according to the appended independent claims. In the method according to the present invention, use is made of an ultrasonic horn with an elongate primary contact surface and an anvil with an elongate primary contact surface, the primary contact surfaces being disposed for cooperating transverse primary sealing of a tubular packaging material clamped between them, the method entailing, in a first step, that the primary contact surfaces abut .the material along a first elongate active primary contact surface, and that, in a second step, after a predetermined penetration into the packaging material has been achieved, the active primary contact surface is widened, increasing the area cooperating for primary sealing on further penetration.
The apparatus according to the present invention comprises an ultrasonic horn with an elongate primary contact surface and an anvil with an elongate primary contact surface intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a tubular packaging material clamped between them, the actively cooperating primary contact surfaces in primary sealing displaying at least two levels of active primary contact surfaces disposed, on abutment of the tubular packaging material, to enter into operative engagement in sequence. The first abutting level further displays a constant height throughout its entire extent and the step difference between the first abutting level and the last abutting level is less than the thickness of the packaging material.
By thus disposing the active primary contact surfaces on levels, the effect which the ultrasonic horn exercises against the packaging material for forming the primary seal will be able to be controlled in a favourable and repeatable manner. When the first abutting level abuts the packaging material with a relatively smaller surface, a relatively high pressure and thereby relatively high effect will occur which locally rapidly forms a melt which spreads when the tools approach one another. When the second actively abutting level abuts, this offloads in that the total primary contact surface which abuts the packaging material increases, the pressure and thereby the effect being reduced so that the melting cycle is arrested somewhat. By providing this effect-reducing widening of the active primary contact surface in a direction towards the interior of the package, i.e. towards that space which corresponds to the space where the product is enclosed or is intended to be enclosed, there will be realised a qualitatively predictable primary seal with a regular primary sealing line.
In various embodiments, the levels may be substantially planar and connected by means of inclining planes, and the second active level may display a width which exceeds the width of the first level. This accentuates the above-outlined effect reduction and involves a possibility of adjusting a thought-for balance in the effect reduction as a result of the relative width of the second primary contact surface and how the widening itself takes place.
The first abutting level may further display reduced width where the overlap joint is expected and the remaining levels may display recesses in association therewith. This makes it possible, on the one hand, to reduce the effects of unstable/unsteady tools and, on the other hand, to ensure that the material which is displaced is not only to be driven in a direction transversely of the direction of the primary seal but also partly in its longitudinal direction. The reason for the latter is that it has proved to be advantageous to spread the material in a controlled manner to the region between the overlap joint and the edges of the recess. In that region, a shortage of material may otherwise occur if the recess and the narrowing of the first primary contact surface display an extent exceeding the width of the overlap joint. Such a margin is often employed when the overlap joint varies slightly in position between subsequent primary seals.
In one embodiment, the anvil may display a first elongate active primary contact surface which, along its extent, displays a constant height in a direction towards the primary contact surface of the ultrasonic horn, the anvil may display a second elongate active primary contact surface intended for cooperation with the primary contact surface of the ultrasonic horn and disposed along and in association with the first primary contact surface of the anvil, and the second primary contact surface of the anvil may be disposed on a level located at a greater distance from the primary contact surface of the ultrasonic horn than the level of the first primary contact surface of the anvil. Production, service and maintenance will hereby be rendered more economical compared with if the configuration according to the present invention had been disposed at the ultrasonic horn.
The total level difference between the first abutting level and the last abutting level may, in one preferred embodiment, be located in a range corresponding to from 1/3 to 2/3 of the thickness of the packaging material.
The anvil may also display a third elongate active primary contact surface intended for cooperation with the primary contact surface of the ultrasonic horn and disposed between the other two, along and adjacent the first primary contact surface of the anvil as well on a level located lower than the level of the first primary contact surface of the anvil and higher than the second primary contact surface of the anvil and thereby at a distance from the primary contact surface of the ultrasonic horn which is located between that of the first and that of the second level. This gradual effect reduction has proved to further increase uniformity in the thus formed primary sealing line and is positive for the agitation in the melt. The first active primary contact surface of the anvil displays, according to one embodiment, a tapering portion for the overlap joint. The purpose of this is to reduce the material volume which is there locally displaced by the first primary contact surface.
According to yet a further embodiment, recesses may be provided in the second, and, where applicable, third primary contact surface of the anvil, and these recesses may display a diverging basic form considered from the first primary contact surface of the anvil and may be located where the overlap joint is expected.
According to one embodiment, the transition between the adjacent active primary contact surfaces may display an angle of inclination of the order of magnitude of between 10 and 35° to achieve a more even transition for material flowing between them.
The walls of the recess may be disposed at an angle in relation to adjacent active primary contact surfaces which is less than 90° and preferably is of the order of magnitude of between 45 and 82°. The purpose of this is to realise a material displacement of molten material to the region in the recess. According to one embodiment of the present invention, the ultrasonic horn and the anvil may be designed with one elongate secondary contact surface each, these secondary contact surfaces being disposed to cooperate with one another and clamp the tubular packaging material for transverse secondary sealing thereof at a predetermined distance from the transverse primary seal. Thus, the apparatus is constructed to realise double transverse seals consisting of one transverse primary seal and one transverse secondary seal each. Such double transverse seals may make a package stronger and less fragile. A powerful jolt against a package displaying single transverse seals could destroy the package. The probability of a package displaying double transverse seals being destroyed by the same jolt is considerably less. In actual fact, it is often the case that a jolt which is sufficiently severe to destroy a single transverse seal leaves a double transverse seal completely intact, and hence neither its transverse primary seal nor transverse secondary seal ruptures.
The apparatus according to the present invention as described above may be constructed so that the primary contact surface and secondary contact surface of the ultrasonic horn are substantially parallel and the primary contact surface and secondary contact surface of the anvil are substantially parallel. On employment of such an apparatus, the sealing result will be one transverse primary and one transverse secondary seal which are also substantially parallel, which is often to be preferred, not only from the point of view of manufacture and function, but also from an aesthetic perspective. According to one embodiment of the invention, the apparatus is designed so that the primary contact surface and secondary contact surface of the anvil are separated by means of an elongate depression in the anvil, and the predetermined distance between the transverse primary seal and the transverse secondary seal depends upon the width of the depression. This design is relatively simple and stable from the mechanical point of view.
The term primary seal is taken to signify that transverse seal which is intended to be disposed most proximal the product in a finished package. In accordance herewith, primary contact surfaces signify those contact surfaces which realise the primary seal. Correspondingly, the term secondary seal signifies a transverse seal which is not intended to be disposed most proximal the product in a finished package, but rather outside the primary seal. In accordance herewith, secondary contact surfaces signify those contact surfaces which realise the secondary seal. It will be apparent from the description in its entirety that a primary seal may occur alone, but that a secondary seal can only occur together with a primary seal. The characterising features which are discussed in connection with the apparatus according to the present invention in ultrasonic sealing may naturally be transferred to the method according to the present invention in ultrasonic sealing. Further, these characterising features may naturally be combined in one and the same embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
Currently preferred embodiments of the present invention will now be described in greater detail hereinbelow, with reference to the accompanying drawings in which identical or similar parts have been given the same reference numeral and in which:
Fig. 1 schematically illustrates the principle in transverse primary sealing of a tubular packaging material; Fig. 2 is a schematic perspective view of an anvil tool designed according to a first embodiment of the present invention;
Fig. 3 is a schematic front elevation of the tool according to Fig. 2;
Fig. 4 is a schematic illustration of a detailed view taken along the section line B-B in Fig. 2;
Fig. 5 is a schematic illustration of a detailed view taken along the section line A-A in Fig. 2;
Fig. 6 is a schematic illustration of a detailed view of the area around where the overlap joint may be expected in Fig. 2; Fig. 7 is a schematic front elevation of an anvil tool designed according to a second embodiment of the present invention;
Fig. 8 schematically illustrates a detailed view taken along the section line B-B in Fig. 7;
Fig. 9 is a schematic illustration of a detailed view taken along the section line A-A in Fig. 7; and
Fig. 10 is a schematic illustration of a detailed view of the area around where the overlap joint is expected in Fig. 7.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS With reference to Fig. 1, there is illustrated in section the principle of a sealing unit for ultrasonic sealing of a tubular packaging material 1 displaying a longitudinal overlap joint 2. The plastic film in the present embodiment displays a thickness of 0.14 mm.
The sealing unit, which is intended for primary sealing only, comprises' an ultrasonic horn with an elongate, planar primary contact surface 3 and an anvil with an active primary contact surface 4 intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a packaging material 1 clamped between them.
In the illustrated example, there are further provided two sealing units in the same tool for the simultaneous formation of two transverse primary seals, one primary seal 5 which finally seals a package surrounding a product 6, and one primary seal 5' which forms the first seal for the subsequent package for product 6'. After sealing, the packages are indexed in a downward direction in Fig. 1.
Further, a knife 7 is disposed to penetrate the packaging material in the zone between the primary seals 5, 5', either wholly in a continuous incision for separating the packages or intermittently or partly for imparting to the zone a tearing indication which facilitates later division and separation of the packages.
The present embodiment will be described in greater detail hereinbelow with reference to the active primary contact surface 4 of the lower anvil in the figures, and thereby the final sealing of the package. However, it should be understood that the same reasoning applies to both of the transverse primary seals of the package. As a result, a direction will also be given in the description of the present embodiment of the invention as directed towards the product space, which then means towards the space which encloses the product or the space where the product is intended to be packed. Figs. 2 and 3 show an anvil tool according to the present invention with double anvils intended to meet ultrasonic horns. The active primary contact surfaces 4, 4' are each disposed in three steps on one side each of a groove 8 in a strip 9. The knife 7 is operatively projectably disposed in the groove.
The strip 9, which may be an integrated part of, or realisably disposed at, the body of the anvil displays, in the present embodiment, a symmetrical topography or profile curve around the groove 8.
Reverting to the primary contact surface 4 most proximal the product space, whose basic profile curve includes a first active plateau 4:1 displaying a width of approx. 0.7 mm. Together with this, in a direction towards the product space, there is disposed an additional active plateau 4:2 displaying a width of approx. 0.7 mm and located on a lower level, a level difference of approx. 0.03 mm. Between the two active plateaux 4:1 and 4:2, there is disposed an inclining plane for obtaining a transition therebetween which is more even in terms of flow. This inclining plane displays an angle of inclination of approx. 15°. The angle interval in this embodiment may be between 10 and 20°, preferably from 14 to 16°. A third active plateau 4:3 is disposed at a further, lower level, approx.
0.02 mm, and displays a width of approx. 0.55 mm. Also between the latter two active plateaux 4:2 and 4:3, there is disposed a second inclining plane so as to obtain a more even transition in terms of flow. This inclining plane also displays an angle of inclination of approx. 15°.
From the first active plateau 4:1 and in a direction towards the groove 8, i.e. in a direction from the product space, there is disposed yet a further inclining plane 10 with a steeper angle of inclination of approx. 35°.
From the third active plateau 4:3 and in a direction towards the product space, there is disposed a terminating, outer inclining plane 11 with an angle of inclination of approx. 1.5°.
Those angles which are mentioned above relate to angles to an imaginary primary sealing plane parallel with the primary seal and which, in this case, may be described as parallel with the primary contact surface of the ultrasonic horn. The first active plateau 4:1 displays, in the present embodiment, a tapering width within an area where the overlap joint is expected. The purpose of this is to reduce the material volume which needs to be displaced precisely there and to increase the local effect there in that the surface which abuts the packaging material is reduced. The width of the plateau 4:1 tapers in that the strip displays recesses in the form of milled portions, a first milled portion 12 in the inclining surface 10 and a distance into the first plateau 4:1, and a second milled portion 13 out of the inclining surface 11, the second and third plateaux 4:2 and 4:3, as well as the inclining surfaces therebetween and partly in the first plateau 4:1. However, a part of the first plateau 4:1 remains unaffected by the recesses, the first plateau 4:1 displaying a constant height throughout all of its extent.
The milled portion 13 directed towards the product space 6 is designed to diverge, its extent in a direction parallel with the primary seal increasing with the increasing distance from the first plateau 4:1. Further, the recess 13 is advantageously designed with inclining edge portions and thus not designed with edges at a right angle to the plateaux 4:1, 4:2, 4:3. As a result, a part of the excess of material which, in conjunction with the recess at the primary sealing, is caused to convert into fluid form, to flow into the recess and thereby fill out the regions around the overlap joint. This compensates for the shortage of material which can otherwise occur there because of the size of the recesses which is partly controlled by the need for margins in order to accommodate variations in the position of the overlap joint.
In the foregoing embodiment, the levels have been described as being located at the anvil. This is also a preferred positioning, but it is also possible within the scope of the present invention to place the level profile curve with the same superior result at the horn itself or to distribute the levels between profile curves in both the horn and the anvil.
According to an alternative embodiment, the sealing tool which is illustrated in Fig. 1 could be disposed for both primary sealing and secondary sealing and comprise an ultrasonic horn (not shown) with planar primary contact surfaces like those (3, 3') described above and elongate planar secondary contact surfaces, as well as an anvil 18 (shown in Fig. 7) with "step-shaped" primary contact surfaces 20, 20' like those (4, 4') described above and elongate planar secondary contact surfaces 22, 22'. Just like the secondary contact surfaces 22, 22', the primary contact surfaces 20, 20' are disposed on one side each of a groove 24 in a strip 26.
Like in the foregoing, the primary contact surfaces are intended to cooperate with each other for the formation of transverse primary seals of a tubular packaging material which is clamped between the ultrasonic horn and the anvil. Correspondingly, the secondary contact surfaces are intended to cooperate with each other for the formation of transverse secondary seals of the tubular packaging material. The result will be double seals, each one consisting of a transverse primary seal and a transverse secondary seal which are substantially parallel.
The above sealing tool thus realises double transverse seals instead of single transverse seals as that according to Fig. 1. Otherwise, the two sealing tools function in the same manner, in which event the sealing tool above, as is apparent from the foregoing description, hence also includes two sealing units for the formation of two double transverse seals, and a knife which runs in the groove 24 for penetration of the packaging material. One of the sealing units will be discussed hereinbelow, but it will be obvious that the same reasoning may be applied to both of the sealing units. Figs. 8 and 9 are partial cross sections through the anvil 18 in Fig. 7, taken along the line B-B and A-A, respectively, in Fig. 7. The primary contact surface 20 is designed in the same manner as the previously described primary contact surface 4 and will, therefore, not be discussed further. Unlike the primary contact surface 20, the secondary contact surface 22 is of planar design. As is illustrated in Fig. 8 and 9, the secondary surface 22 lies flush with the uppermost plateau of the primary contact surface 20, i.e. that plateau which first comes into contact with the packaging material when the ultrasonic horn and the anvil approach one another. Consequently, the primary contact surface, along its uppermost plateau, and the secondary contact surface will come into contact with the packaging material substantially simultaneously on the introduction of the sealing cycle.
The primary and secondary contact surfaces 20 (20') and 22 (22') are parallel and separated by a depression 28 (28') in the strip 26. Since the primary contact surfaces realise the transverse primary seal and the secondary contact surfaces realise the transverse secondary seal, the width 30 (30') of the depression 28 (28') at the contact surfaces will define the distance between the seals. The sealing distance will, under normal use of the sealing tool, be slightly less than the width 30 of the depression because of the thermal propagation in the packaging material.
Just like the primary contact surface in the first-described embodiment, the secondary contact surface 22 in the present embodiment displays, as illustrated in Fig. 10, a tapering width within an area where the overlap joint of the tubular packaging material is expected. The purpose of this is to reduce the material volume which needs to be displaced precisely there and to increase the effect locally there by reducing the surface which is in contact with the packaging material. The tapering width is realised by means of a first recess 32 in the strip 26.
The strip 26 also has a second recess 34 formed partly in the primary contact surface 20 which is intended to receive the overlap joint of the tubular packaging material. The second recess 34 is divergent and in the form of a step with two levels 34a, 34b. This step configuration promotes the realisation of straight seals, i.e. an even distance between the transverse primary and transverse secondary seals throughout the entire packaging material. The above-described embodiments should only be considered as examples, A person skilled in the art will readily perceive that these embodiments may be modified in numerous different ways without departing from the spirit and scope of the present invention. For example, the anvil in the foregoing embodiment is formed with a primary contact surface and a secondary contact surface which are separated by a depression for each one of the two sealing units. The double transverse seal is obtained as a result of this design of the anvil. In such an embodiment, the ultrasonic horn may be designed in numerous different ways, for example with a primary contact surface and a secondary contact surface which are not separated but instead interconnected with one another in the same plane for each one of the two sealing units. In an alternative embodiment, the relationship could be the reverse, in which event the double transverse seal could instead be obtained as a result of the design of the ultrasonic horn. In the foregoing embodiment, the transverse primary seal is step-shaped while the transverse secondary seal is planar. The secondary seal could be designed in other ways, for example with a step configuration in which event the two transverse seals could be uniform.
Finally, it should be observed that the figures are not drawn to scale.

Claims

1. A method in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure displaying an overlap joint extending along the longitudinal direction of the tubular packaging material, comprising an ultrasonic horn with an elongate primary contact surface and an anvil with an elongate primary contact surface, said primary contact surfaces being disposed for cooperating transverse primary sealing of a tubular packaging material clamped between them, characterised in that, in a first step, the primary contact surfaces abut the material along a first elongate active primary contact surface, and that, in a second step, after a predetermined penetration into the packaging material has been achieved, the active primary contact surface is widened, increasing the area cooperating for primary sealing on further penetration.
2. The method as claimed in claim 1, wherein the widening takes place at a distance from the overlap joint so that the area which locally abuts there against will substantially remain the same.
3. The method as claimed in claim 1 or 2, wherein molten packaging material from the widened primary contact surfaces is caused partly to be displaced in a direction towards the overlap joint, and wherein the widening takes place to at least twice the width displayed by the first elongate active primary contact surface.
4. The method as claimed in any of the preceding claims, wherein the ultrasonic horn further displays an elongate secondary contact surface and the anvil further displays an elongate secondary contact surface, the secondary contact surfaces cooperating with each other and clamping the tubular packaging material for transverse secondary sealing at a predetermined distance from the transverse primary seal.
5. An apparatus in ultrasonic sealing of a tubular packaging material of non fibre multilayer structure displaying an overlap joint extending along the longitudinal direction of the tubular packaging material, comprising an ultrasonic horn with an elongate primary contact surface (3) and an anvil with an elongate primary contact surface (4) intended to cooperate with the primary contact surface of the ultrasonic horn for transverse primary sealing of a tubular packaging material (1) clamped between them, characterised in that the actively cooperating primary contact surfaces (3, 4) in primary sealing display at least two levels of active primary contact surfaces (4:1, 4:2, 4:3) disposed, on abutment of the tubular packaging material, to enter into operative engagement in sequence, that the first abutting level (4:1) displays a constant height throughout its entire extent, and that the level difference between the first abutting level (4:1) and the last abutting level (4:3) is less than the thickness (t) of the packaging material.
6. The apparatus as claimed in claim 5, wherein the levels (4:1, 4:2, 4:3) are substantially planar and connected by means of inclining planes.
7. The apparatus as claimed in claim 5 or 6, wherein the first abutting level
(4:1) displays a reduced width where the overlap joint is expected, and wherein the remaining levels display recesses (13) in association therewith.
8. The apparatus as claimed in any of claims 5 to 7, wherein the anvil displays a first elongate active primary contact surface (4: 1) which, along its extent, displays a constant height in a direction towards the primary contact surface (3) of the ultrasonic horn, wherein the anvil displays a second elongate active primary contact surface (4:3) intended for cooperation with the primary contact surface of the ultrasonic horn and disposed along and in association with the first primary contact surface (4:1) of the anvil, and wherein the second primary contact surface (4:3) of the anvil is disposed on a level located at a greater distance from the primary contact surface (3) of the ultrasonic horn than the level of the first primary contact surface (4:1) of the anvil.
9. The apparatus as claimed in any of claims 5 to 8, wherein the second active level/primary contact surface (4:3) displays a width which exceeds the width of the first level/primary contact surface (4: 1).
10. The apparatus as claimed in any of claims 8 or 9, wherein the total level difference between the first actively abutting level (4:1) and the last actively abutting level (4:3) is located in a range corresponding to 1/3 to 2/3 of the thickness (t) of the packaging material.
11. The apparatus as claimed in any of claims 8 to 10, wherein the anvil displays a third elongate active primary contact surface (4:2) intended for cooperation with the primary contact surface of the ultrasonic horn and disposed between the other two active primary contact surfaces, along and adjacent the first primary contact surface (4:1) of the anvil and on a level located lower than the level of the first primary contact surface (4:1) of the anvil and higher than the second primary contact surface (4:3) of the anvil, and thereby at a distance from the primary contact surface of the ultrasonic horn (3) which is located between that of the first and that of the second level.
12. The apparatus as claimed in any of claims 8 to 11, wherein the first active primary contact surface (4:1) of the anvil displays a tapering portion for the overlap joint.
13. The apparatus as claimed in any of claims 8 to 12, wherein recesses (13) are provided in the second (4:3) and, where applicable, third primary contact surface (4:2) of the anvil, and wherein these recesses (13) display a diverging basic configuration seen from the first primary contact surface (4:1) of the anvil and are located where the overlap joint is expected.
14. The apparatus as claimed in any of claims 5 to 13, wherein the transition between the adjacent active primary contact surfaces displays an angle of inclination in the range of between 15 and 35°.
15. The apparatus as claimed in any of claims 7 to 14, wherein the walls of the recess are disposed at an angle in relation to adjacent active primary contact surfaces which is less than 90° and preferably is in the range of between 45 and 82°.
16. The apparatus as claimed in any of claims 5 to 15, wherein the ultrasonic horn further displays an elongate secondary contact surface and the anvil (18) further displays an elongate secondary contact surface (22), said secondary contact surfaces being disposed to cooperate with one another and clamp the tubular packaging material for transverse secondary sealing at a predetermined distance from the transverse primary seal.
17. The apparatus as claimed in claim 16, wherein the primary contact surface and secondary contact surface of the ultrasonic horn are substantially parallel, and the primary contact surface (20) and secondary contact surface (22) of the anvil (18) are substantially parallel.
18. The apparatus as claimed in any of claims 16 or 17, wherein the primary contact surface (20) and secondary contact surface (22) of the anvil (18) are separated by an elongate depression (28) in the anvil and the predetermined distance between the transverse primary seal and the transverse secondary seal depends upon a width (30) of the depression.
PCT/SE2005/001451 2004-10-15 2005-10-03 A method and an apparatus in ultrasonic sealing WO2006041377A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402519-3 2004-10-15
SE0402519A SE527763C2 (en) 2004-10-15 2004-10-15 Method and apparatus for ultrasonic sealing

Publications (1)

Publication Number Publication Date
WO2006041377A1 true WO2006041377A1 (en) 2006-04-20

Family

ID=33448649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001451 WO2006041377A1 (en) 2004-10-15 2005-10-03 A method and an apparatus in ultrasonic sealing

Country Status (2)

Country Link
SE (1) SE527763C2 (en)
WO (1) WO2006041377A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012202016A1 (en) * 2012-02-10 2013-08-14 Pantec Ag Method and device for the assembly of thin plastic films
EP2057073B1 (en) 2006-08-30 2016-04-20 Elopak Systems Ag Improvements in or relating to packaging
JP2016153317A (en) * 2015-02-20 2016-08-25 日本テトラパック株式会社 Packaging/filling device
DE102017119273A1 (en) * 2017-08-23 2019-02-28 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding tool with sealing surface
EP3978227A1 (en) * 2020-10-01 2022-04-06 Tetra Laval Holdings & Finance S.A. A method for transversally sealing a tube of packaging material using an ultrasonic sealing device, an anvil and an ultra-sonic sealing device
EP3383619B1 (en) * 2015-11-30 2024-03-20 Sonics & Materials Inc. Sealing system and method for gusseted and zippered bags

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1066951A2 (en) * 1999-07-05 2001-01-10 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
EP1127794A2 (en) * 2000-02-23 2001-08-29 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
WO2001094234A1 (en) * 2000-06-05 2001-12-13 Herrmann Ultraschalltechnik Gmbh & Co. Kg Thin-walled container and method for production thereof
EP1241098A1 (en) * 2001-03-12 2002-09-18 Tetra Laval Holdings & Finance SA Ultrasonic transverse sealing device and method for sealing walls of a packaging material filled with a pourable food product

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1066951A2 (en) * 1999-07-05 2001-01-10 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
EP1127794A2 (en) * 2000-02-23 2001-08-29 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
WO2001094234A1 (en) * 2000-06-05 2001-12-13 Herrmann Ultraschalltechnik Gmbh & Co. Kg Thin-walled container and method for production thereof
EP1241098A1 (en) * 2001-03-12 2002-09-18 Tetra Laval Holdings & Finance SA Ultrasonic transverse sealing device and method for sealing walls of a packaging material filled with a pourable food product

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2057073B1 (en) 2006-08-30 2016-04-20 Elopak Systems Ag Improvements in or relating to packaging
EP2057073B2 (en) † 2006-08-30 2019-10-09 Elopak Systems Ag Improvements in or relating to packaging
US9731484B2 (en) 2012-02-10 2017-08-15 Pantec Ag Method and device for making tubular bags of thin plastic films by means of an ultrasound welding process
DE102012202016B4 (en) * 2012-02-10 2014-06-05 Pantec Ag Method and device for the assembly of thin plastic films
DE102012202016A1 (en) * 2012-02-10 2013-08-14 Pantec Ag Method and device for the assembly of thin plastic films
JP2016153317A (en) * 2015-02-20 2016-08-25 日本テトラパック株式会社 Packaging/filling device
CN107249988A (en) * 2015-02-20 2017-10-13 利乐拉瓦尔集团及财务有限公司 Pack filling device
EP3260383A4 (en) * 2015-02-20 2018-10-31 Tetra Laval Holdings & Finance S.A. Packing/filling apparatus
WO2016132986A1 (en) * 2015-02-20 2016-08-25 テトラ ラバル ホールディングス アンド ファイナンス エス エイ Packing/filling apparatus
CN107249988B (en) * 2015-02-20 2020-02-07 利乐拉瓦尔集团及财务有限公司 Packing and filling device
EP3383619B1 (en) * 2015-11-30 2024-03-20 Sonics & Materials Inc. Sealing system and method for gusseted and zippered bags
DE102017119273A1 (en) * 2017-08-23 2019-02-28 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding tool with sealing surface
US11820082B2 (en) 2017-08-23 2023-11-21 Herrmann Ultraschalltechnik Gmbh & Co. Kg Welding method for a multilayer composite having a barrier layer
EP3978227A1 (en) * 2020-10-01 2022-04-06 Tetra Laval Holdings & Finance S.A. A method for transversally sealing a tube of packaging material using an ultrasonic sealing device, an anvil and an ultra-sonic sealing device
WO2022069508A1 (en) * 2020-10-01 2022-04-07 Tetra Laval Holdings & Finance S.A. A method for transversally sealing a tube of packaging material using an ultrasonic sealing device, an anvil and an ultra-sonic sealing device

Also Published As

Publication number Publication date
SE0402519L (en) 2006-04-16
SE0402519D0 (en) 2004-10-15
SE527763C2 (en) 2006-05-30

Similar Documents

Publication Publication Date Title
EP0204839B1 (en) Heatseal die
WO2006041377A1 (en) A method and an apparatus in ultrasonic sealing
US5658644A (en) Light weight board of improved mechanical strength and manufacture thereof
KR960016322B1 (en) Self-standing bag and method and device for making the said bag
CA1237394A (en) Detachable plastic bag pad and process for making same
US8201606B2 (en) Device for transverse sealing
EP0950607A1 (en) Easy-to-open packaging bag and apparatus for production thereof
EP2250095B1 (en) Easy to open package
US20120201480A1 (en) Zipper tape, packaging bag with zipper tape, method for producing packaging bag with zipper tape and production device therefor
JP2001233309A (en) Ultrasonic sealing apparatus
EP2119558A1 (en) Method for producing pouch container with spout
EP1241100B1 (en) Ultrasonic transverse sealing method and device for sealing walls of a packaging material filled with a pourable food product
KR20070010036A (en) Counter element and method of producing the same
JP2006232295A (en) Spout
JPWO2006112448A1 (en) Manufacturing apparatus and manufacturing method of bag with chuck tape
RU2329185C2 (en) Opening device, packing and method to produce packing with opening device
EP3656544B1 (en) Hybrid sealing tool having multiple seal patterns
EP2057073A2 (en) Improvements in or relating to packaging
JP3864268B2 (en) Horn for forming a welded part of a tube
JP2021530414A (en) Packaging materials and methods of providing packaging materials
EP4261018A1 (en) A transversal sealing system and a method for transversally sealing a tube of packaging material
CN115003492A (en) Method of joining workpieces and composite article
JP5019538B2 (en) Packaging bag and vertical bag making and filling machine
CN112969642A (en) Filling and packaging machine, content filling container, and method for manufacturing the same
JP4723844B2 (en) Cylindrical package, packaging method and packaging apparatus

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase