CH680422A5 - - Google Patents

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Publication number
CH680422A5
CH680422A5 CH4264/89A CH426489A CH680422A5 CH 680422 A5 CH680422 A5 CH 680422A5 CH 4264/89 A CH4264/89 A CH 4264/89A CH 426489 A CH426489 A CH 426489A CH 680422 A5 CH680422 A5 CH 680422A5
Authority
CH
Switzerland
Prior art keywords
sealing
depressions
sealing tool
tool according
jaw
Prior art date
Application number
CH4264/89A
Other languages
English (en)
Inventor
Juris Walter
Hans-Rudolf Naegeli
Original Assignee
Alusuisse Lonza Services Ag
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 Alusuisse Lonza Services Ag filed Critical Alusuisse Lonza Services Ag
Priority to CH4264/89A priority Critical patent/CH680422A5/de
Priority to US07/616,368 priority patent/US5141594A/en
Priority to CA 2030611 priority patent/CA2030611A1/en
Publication of CH680422A5 publication Critical patent/CH680422A5/de

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2036—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container the seal having a stress concentrating portion
    • 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
    • B29C65/76—Making non-permanent or releasable 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
    • B29C66/10—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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/7234—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 barrier layer
    • 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
    • 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
    • B29C66/81413—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 non-symmetrical
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/30—Opening or contents-removing devices added or incorporated during filling or closing of containers
    • B65D77/38—Weakened closure 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
    • B29C66/3284—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for weakening the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Description

1
CH 680 422 A5
2
Beschreibung
Die Erfindung betrifft ein Siegelwerkzeug zum Heisssiegeln eines abziehbaren Deckels auf einen Behälter, wobei an dem Deckel eine Anreisslasche zum Abziehen des Deckels von Hand angeformt ist.
Bei abziehbaren («peelbaren») Deckeln für sterilisierbare und wiedererwärmbare Behälter aus Barriere-Kunststoff oder einem Aluminium enthaltenden Verbundwerkstoff (z.B. STERALCON-Scha-len) z.B. für Nahrungsmittel, treten Probleme aufgrund sich widersprechender Anforderungen auf. Einerseits müssen sehr feste Versiegelungen erreicht werden, um die bei der Sterilisation und vor allem beim Wiedererwärmen im Wasserbad auftretenden hohen Innendrücke auszuhalten. Andererseits soll der Deckel leicht von Hand zu öffnen sein.
Um die erwähnten guten Verschlusseigenschaften zu erreichen, müssen beim Verschliessen hohe Siegeltemperaturen und Siegeidrücke angewendet werden. Dies führt zu sogenannter Siegelraupenbildung, insbesondere in einer auf der Deckelunterseite befindlichen Siegelschicht, und zwar sowohl auf der Behälterinnen- als auch auf der Behälter-aussenseite. Die Bildung solcher Siegelraupen auf der Behälterinnenseite verbessert einerseits die Verschlusssicherheit und ist durchaus erwünscht; andererseits führt sie jedoch zu hohen Anreisskräften beim Abziehen («peelen»), die das Aufreis-sen stark erschweren und teilweise sogar verun-mögiichen.
Der Erfindung liegt die Aufgabe zugrunde, ein Siegelwerkzeug zu schaffen, das das Anheften eines abziehbaren Deckels an einen Behälter mit einer Siegelnaht ausreichender Festigkeit und gleichzeitig leichter Abziehbarkeit ermöglicht.
Zur Lösung dieser Aufgabe ist bei einem Siegelwerkzeug der angegebenen Art vorgesehen, dass mindestens eine Siegelbacke des Siegelwerkzeuges mindestens im Bereich der Anreisslasche mit Vertiefungen versehen ist, die vom Rand der die Siegelnaht ausbildenden Druckfläche ausgehen und sich über einen Teil der Breite der Druckfläche erstrecken.
Mit einem Siegelwerkzeug nach der Erfindung ist die Siegelraupe vorzugsweise im Bereich der Anreisslasche oder bei runden Behältern über den ganzen Behälterumfang durch den Vertiefungen im Siegelwerkzeug entsprechenden Nasen unterbrochen. Der Anriss erfolgt daher nicht mehr über die ganze Länge der Siegelraupe, sondern nur noch in den kleineren Bereichen der Nasen. Deshalb sinken die Anreisskräfte auf Werte, welche ein leichtes Anreissen mittels der Anreisslasche und somit ein leichtes Abziehen des Deckels vom Behälter ermöglichen.
Die Vertiefungen können in verschiedenen Formen ausgebildet sein. Am einfachsten herzustellen und gleichzeitig sehr wirkungsvoll sind Vertiefungen in Form von konischen Spitzen, die vorteilhaft durch Fräsen hergestellt sind. Diese Vertiefungen sollten sich höchstens über die halbe Breite der Druckfläche des Siegelwerkzeuges erstrecken.
Wenngleich Vertiefungen jedenfalls vom äusseren Rand des Siegelwerkzeuges ausgehen sollen, können zusätzlich auch Vertiefungen ausgehend vom inneren Rand vorgesehen werden, und zwar insbesondere in Fällen, bei denen die innere Siegelraupenausbildung nicht von Bedeutung ist. Diese Ausgestaltung des Siegelwerkzeuges erleichtert das Anreissen an beiden Siegelkanten und unterbindet zusätzlich die Delaminationsneigung bei Bildung des Deckels aus einem Verbundwerkstoff mit niedriger Kaschierhaftung.
Die Erfindung ist im folgenden anhand schemati-scher Zeichnungen an einem Ausführungsbeispiel mit weiteren Einzelheiten näher erläutert.
Fig. 1 zeigt einen Teilquerschnitt durch einen Behälter mit Deckel während des Siegelvorgangs mit einem herkömmlichen Siegelwerkzeug mit einer oberen und unteren Siegelbacke;
Fig. 2a, 2b und 2c zeigen Unteransichten jeweils auf die die Siegelnaht erzeugende Druckfläche von drei unterschiedlich ausgeführten oberen Siegelbacken eines Siegelwerkzeugs;
Fig. 3 zeigt eine Draufsicht auf einen im wesentlichen rechteckigen Behälter mit abgerundeten Ecken, der mit einem entsprechend gestalteten Siegelwerkzeug gemäss der Erfindung hergestellt ist;
Fig. 4 zeigt eine Unteransicht einer Siegelbacke eines erfindungsgemässen Siegelwerkzeuges für einen runden Behälter;
Fig. 5a bis 5d zeigen Teilquerschnitte unterschiedlich ausgeführter Siegelwerkzeuge gemäss der Erfindung und
Fig. 6 stellt einen Querschnitt durch einen Behälter mit Deckel wähend des Siegeins mit einem Siegelwerkzeug gemäss der Erfindung dar.
Gemäss Fig. 1 ist ein Deckel 1 von einer mit einer Siegelschicht 3 kaschierten Aluminiumfolie 2 gebildet und auf einen beispielsweise aus Kunststoff bestehenden Behälter 4 aufgesetzt. Der Randbereich ist eingeklemmt zwischen einer oberen, üblicherweise elektrisch beheizten Siegelbacke 5 und einer unteren Siegelbacke 6 eines Siegelwerkzeuges dargestellt. Durch den Druck und die Temperatur zwischen der oberen Siegelbacke 5 und der unteren Siegelbacke 6 werden die Siegelschichten des Deckeis 3 und Behälters 4 erweicht und etwas zusammengedrückt und bilden so mit der inneren und äusseren Siegelraupe 7 und 8 die Siegelnaht.
Die die Siegelnaht bildende Druckfläche der oberen Siegelbacke 5 ist mit 9 bezeichnet.
Gemäss Fig. 2a sind in den äusseren Rand 10 der oberen Siegelbacke 5 eines Siegelwerkzeuges nach der Erfindung konische Vertiefungen 11 eingefräst, die ausgehend vom äusseren Rand 10 in Breitenrichtung der Druckfläche 9 zulaufen. Die Vertiefungen 11 erstrecken sich über weniger als die halbe Breite b der Druckfläche 9.
Bei der Ausführung nach Fig. 2b sind konische Vertiefungen 11 zusätzlich am inneren Umfang der Siegelbacke 5 ausgebildet.
Bei der Ausführung nach Fig. 2c sind die Vertiefungen 11 am äusseren Umfang halbkreisförmig (im Querschnitt der Backen 5 gemäss Fig. 5b und 5c viertelkreisförmig) und am inneren Umfang mit
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CH 680 422 A5
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«negativem» Profil 11" ebenfalls halbkreisförmig ausgebildet.
Somit wird eine äussere Siegelraupe 8 ausgebildet, die nicht in Umfangsrichtung, sondern vielmehr entlang den Rändern der eingefrästen Vertiefungen 11 verläuft und somit einem Anreissen weniger Widerstand entgegensetzt als eine in Umfangsrichtung durchgehende Siegelraupe 8 gemäss dem Stand der Technik. Bei der erfindungsge-mässen Gestaltung werden viele kleine Siegelnasen oder -spitzen 11' gemäss Fig. 3 und 4 im Bereich der Anreisslasche ausgebildet, die in Fig. 3 mit 13 bezeichnet und an einer Ecke angeordnet ist. Bei einem runden Behälter, der mit einer Siegelbacke 5 gemäss Fig. 4 hergestellt ist, kann eine solche Anreisslasche an beliebiger Stelle des Umfanges, jedoch im Bereich der durch das Siegelwerkzeug nach der Erfindung geprägten Siegelspitzen 11' vorgesehen sein.
Beispiel:
Bei einer ausgeführten Konstruktion gemäss Fig. 3 wurde die Verminderung der Anreisskraft aufgrund der zackenförmigen Ausgestaltung des Siegelwerkzeuges im Bereich der Anreisslasche gemessen.
Messung 1:
Siegelung:
Radius ohne Vertiefungen
Anreisskraft:
53N
Weiterreisskraft:
20N
Siegelung:
Radius mit Vertiefungen (Zackengeometrie)
Anreisskraft:
25N
Weiterreisskraft:
20N
Die Fig. 5a bis 5d zeigen in Teilquerschnitten der jeweils oberen Siegelbacke 5 unterschiedliche Ausgestaltungen der Vertiefungen 11, nämlich rechteckig in Fig. 5a, dreieckig bzw. viertelkreisförmig in Fig. 5b, beidseitig rechteckig bzw. viertelkreisförmig in Fig. 5c und beidseitig dreieckig in Fig. 5d.
Fig. 6 veranschaulicht in einer Darstellung entsprechend Fig. 1 (Teile mit gleichen Bezugszeichen sind nicht nochmals beschrieben) den Siegelvorgang mit einem Siegelwerkzeug gemäss der in Fig. 5a dargestellten Ausführung der Erfindung mit im Querschnitt rechteckigen Vertiefungen 11 nur auf der Aussenseite der oberen Siegelbacke 5. Auch in diesem Fall bildet sich eine äussere Siegelraupe 8 aus, die jedoch dem Verlauf des zackenförmigen Randes der Vertiefungen 11 folgt und somit einem späteren Anreissvorgang einen geringeren Widerstand entgegensetzt.

Claims (8)

Patentansprüche
1. Siegelwerkzeug zum Heisssiegeln eines abziehbaren Deckels (1) auf einen Behälter (4), wobei an dem Deckel (1) eine Anreisslasche (13) zum Abziehen des Deckels von Hand angeformt ist, dadurch gekennzeichnet, dass mindestens eine Siegelbacke (5) des Siegelwerkzeuges mindestens im Bereich der Anreisslasche (13) mit Vertiefungen (11) verse-5 hen ist, die vom Rand (10) der die Siegelnaht ausbildenden Druckfläche (9) ausgehen und sich über einen Teil der Breite der Druckfläche (9) erstrecken.
2. Siegelwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Vertiefungen (11) sich vom
10 Rand (10) ausgehend konisch zuspitzen.
3. Siegelwerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vertiefungen vom äusseren Rand (10) der Siegelbacke (5) ausgehen.
4. Siegelwerkzeug nach Anspruch 1 oder 2, da-15 durch gekennzeichnet, dass die Vertiefungen sowohl vom äusseren als auch vom inneren Rand der Siegelbacke (5) ausgehen.
5. Siegelwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Vertiefun-
20 gen (11) sich höchstens über die halbe Breite (b) der Druckfläche (9) erstrecken.
6. Siegeiwerkzeug nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Vertiefungen von Einfräsungen gebildet sind.
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7. Siegelwerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vertiefungen (11) ausschliesslich in derauf den Deckel (1) einwirkenden oberen Siegelbacke (5) ausgebildet sind.
8. Siegelwerkzeug nach einem der Ansprüche 1 30 bis 7, dadurch gekennzeichnet, dass die Vertiefungen (11 ) um den ganzen Umfang der Siegelbacke (5) herum ausgebildet sind (Fig. 4).
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CH4264/89A 1989-11-29 1989-11-29 CH680422A5 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH4264/89A CH680422A5 (de) 1989-11-29 1989-11-29
US07/616,368 US5141594A (en) 1989-11-29 1990-11-20 Sealing tool for heat-sealing a pull-off lid onto a container
CA 2030611 CA2030611A1 (en) 1989-11-29 1990-11-22 Sealing tool for heat-sealing a pull-off lid onto a container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4264/89A CH680422A5 (de) 1989-11-29 1989-11-29

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CH680422A5 true CH680422A5 (de) 1992-08-31

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FR2731381A1 (fr) * 1995-03-06 1996-09-13 Rockwell Bcs France Ensemble d'electrodes pour souder des revetements en matiere plastique
EP2100818A1 (de) * 2008-03-13 2009-09-16 Rainer Naroska engineering GmbH Aufreissbare Siegelverpackung
EP2272764A1 (de) 2009-07-10 2011-01-12 Marcus Naroska Verfahren und Vorrichtung zum Siegeln einer Aufreissfolie auf ein Verpackungselement

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US6264098B1 (en) * 1997-02-06 2001-07-24 Sonoco Development, Inc. Tubular container with a heat seal having non-symmetrical inner and outer beads
CA2579479A1 (en) * 2004-09-13 2006-03-23 Crown Packaging Technology, Inc. Tab folding and sealing apparatus and method
ES2350592T3 (es) * 2006-07-13 2011-01-25 Impress Metal Packaging Sa Tapa de recipiente con una membrana desprendible.
GB0624404D0 (en) * 2006-12-06 2007-01-17 D2 Food Systems Ltd Food Container
MX2011009628A (es) * 2009-03-13 2011-09-29 Nestec Sa Cubiertas compuestas para envases.
JP5859354B2 (ja) * 2012-03-22 2016-02-10 大王製紙株式会社 衛生薄葉紙収納箱
JP6132286B2 (ja) * 2013-07-01 2017-05-24 大日本印刷株式会社 容器
JP6065182B2 (ja) * 2013-07-01 2017-01-25 大日本印刷株式会社 容器
JP6065181B2 (ja) * 2013-07-01 2017-01-25 大日本印刷株式会社 容器
JP6083706B2 (ja) * 2013-07-01 2017-02-22 大日本印刷株式会社 容器及びシールバー
JP6143583B2 (ja) * 2013-07-01 2017-06-07 大日本印刷株式会社 シールヘッドおよび同シールヘッドを用いて封止された容器
JP6132287B2 (ja) * 2013-07-01 2017-05-24 大日本印刷株式会社 容器
JP6629870B2 (ja) * 2015-09-30 2020-01-15 エースコック株式会社 ヒートシール装置
NL2018522B1 (en) * 2017-03-15 2018-09-24 @Llied Invest B V Method, device and stamp for producing a sealed container as well as a sealed container with a product to be preserved therein
GB2611359A (en) * 2021-10-04 2023-04-05 Douwe Egberts Bv Improvements in or relating to beverage capsules

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EP0203032A1 (de) * 1985-05-17 1986-11-26 Alcan Rorschach AG Siegelkopf

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EP0015885A1 (de) * 1979-03-03 1980-09-17 AB Akerlund & Rausing Verfahren zum Schliessen eines Behälters mit einem Deckel
EP0203032A1 (de) * 1985-05-17 1986-11-26 Alcan Rorschach AG Siegelkopf

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731381A1 (fr) * 1995-03-06 1996-09-13 Rockwell Bcs France Ensemble d'electrodes pour souder des revetements en matiere plastique
EP2100818A1 (de) * 2008-03-13 2009-09-16 Rainer Naroska engineering GmbH Aufreissbare Siegelverpackung
EP2272764A1 (de) 2009-07-10 2011-01-12 Marcus Naroska Verfahren und Vorrichtung zum Siegeln einer Aufreissfolie auf ein Verpackungselement
US8316623B2 (en) 2009-07-10 2012-11-27 Rainer Naroska Verpackungsmaschinen Gmbh & Co. Kg Method and apparatus for forming a sealed seam between a tear-off film and a packaging member

Also Published As

Publication number Publication date
CA2030611A1 (en) 1991-05-30
US5141594A (en) 1992-08-25

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