WO1996032341A1 - Recipient et son procede de fabrication - Google Patents

Recipient et son procede de fabrication Download PDF

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Publication number
WO1996032341A1
WO1996032341A1 PCT/EP1996/001562 EP9601562W WO9632341A1 WO 1996032341 A1 WO1996032341 A1 WO 1996032341A1 EP 9601562 W EP9601562 W EP 9601562W WO 9632341 A1 WO9632341 A1 WO 9632341A1
Authority
WO
WIPO (PCT)
Prior art keywords
container wall
container
sealing
wall
support surface
Prior art date
Application number
PCT/EP1996/001562
Other languages
German (de)
English (en)
Inventor
Hermann Meili
Original Assignee
Albiplast 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 Albiplast Ag filed Critical Albiplast Ag
Priority to EP96914908A priority Critical patent/EP0820413A1/fr
Priority to DE29619269U priority patent/DE29619269U1/de
Publication of WO1996032341A1 publication Critical patent/WO1996032341A1/fr

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
    • 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
    • B29C66/11—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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled 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
    • B29C66/10—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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • 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
    • B29C66/50—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
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material

Definitions

  • the invention relates to a container according to the preamble of patent claim 1 and a method for its production according to the preamble of patent claim 6.
  • the invention relates to containers for foodstuffs such as dairy products.
  • the known cups have a cup wall which is reinforced in the area of the support surface of a closure film and in particular has a so-called sealing edge which projects outwards.
  • a sealing edge is typically made of plastic like the cup wall and has, for example, a width of approximately 2 mm to 4 mm and a thickness of 0.5 mm to 1.5 mm.
  • the cup wall usually has a wall thickness of 0.5 mm to 1.5 mm.
  • the known cups are closed with an aluminum plate which is coated with an adhesive on its side facing the cup.
  • a sealing wax is used as the adhesive, which consists of a plastic lacquer with a low melting point or alternatively of one Hot glue exists.
  • a plastic film can also be used as the sealing film.
  • the cups known for example from EP 0 252 792 A1 and the known method have the disadvantage that the cups must necessarily have the aforementioned sealing edge.
  • the cost of the material of the sealing edge increases the cost of the cup. If the cup is manufactured using spraying technology, the production time also increases compared to a cup without a sealing rim. In addition, there is the cost of the area of the sealing film which is provided in order to cover the sealing edge entirely.
  • the seal edge also increases the volume and the weight of a cup, the weight of the aforementioned surface of the sealing film also contributing to completely covering the seal edge. Increasing the volume and weight of a cup also increases transportation costs.
  • Another disadvantage of the known cups is that due to the relatively large amount of material for cups and sealing film, increased expenses for disposal are to be incurred.
  • Another disadvantage of the known cups is that in many cases the sealing film is difficult or uneven to remove from the cup, since the film adheres differently to the cup.
  • Such a sealing rim also proves not to be mouth-sized, so that cups with such a sealing rim cannot be used as drinking vessels without further notice.
  • Thermal energy also melts part of the cup wall material, which deposits on the inside and outside of the cup.
  • the cup wall material (brow) cooled outside the cup can lead to injuries even if the shape is barely visible.
  • Containers with a relatively large wall thickness (greater than 3 mm) with a sealed film membrane (“tamper-evident closure”) and a screw or slip lid are also known.
  • a tamper-evident seal serves to ensure that the contents of the container cannot be changed after it has been originally filled and the tamper-evident seal has been applied, and can be aroma-tight.
  • These containers e.g. are known from DE 9108868.2, for example medicine (tablet) bottles do not have a sealing rim due to their large wall thickness and the mechanical stability associated therewith.
  • the screw or slip lid forms a secondary lock.
  • Containers or containers and methods for their production are also known from:
  • the invention is based on the technical problem of creating a container and a method for its production, the use of material for the cup being minimized.
  • the invention has a number of advantages.
  • the container according to the invention is on the one hand tightly closable and on the other hand is mouth-shaped and is therefore also suitable as a drinking vessel.
  • the material saving is further increased by openings in the container wall which serve to hold molten container wall material.
  • the sealing film adheres evenly to the container according to the invention and can thus be easily removed from the container by the end user without remnants of the sealing film sticking to the container.
  • the melted container wall material in the production according to the invention reaches openings provided for this purpose in the container wall, so that contact of the melted container material (plastic) with air is avoided. This also avoids the formation of sharp eyebrows (solidified plastic residues) and injuries to the persons handling the containers, for example when selling the cups and when consuming the container filling. - 6 -
  • FIG. 4 u. 5 two configurations of a container according to the invention, likewise before and after connection with a sealing film;
  • the cup-shaped containers according to the prior art which are shown in FIGS. 1 to 3, have in common that they have a sealing edge 7 in the region of the contact surface 10 of the closure film 2.
  • This sealing edge 7 is formed in one piece with the container wall 9.
  • the cups shown in FIGS. 1 to 3 have in common that the sealing film is pressed with a defined pressure P and after heating against the sealing edge by a stamp or sealing head 1.
  • the area of the sealing edge is related to the exertable pressure P.
  • the smaller the sealing edge the smaller the exertable pressure P. Small pressures, however, lead to poor, irregular heat transfer from the sealing head to the film and from there to the edge of the container, with sharp brows outside the container.
  • FIG. 2 shows a sealing head 1 with a comb 4.
  • This comb leaves a groove 8 on the sealing film 2 and effects only a partial sealing on the sealing edge.
  • the actual connection between the sealing film and the sealing edge is thus limited to a relatively small area. Nevertheless, even with this arrangement, eyebrows 6 and sealed sealing wax residues are formed inside the container and also outside the container.
  • Fig. 3 shows a container with a sealing edge, a comb 5 being arranged on the sealing edge.
  • brows 6 are again formed, which, like sealed sealing wax residues, form both on the outside and on the container.
  • FIG. 4 shows a first embodiment of a container according to the invention, of which only a section through a lateral container wall 9 is shown.
  • the container wall 9 with a wall thickness w at least one opening 13, preferably two openings (depressions) 11 or 12 and 13, are provided in its upper region, that is to say in the region of the later contact surface 10 (FIG. 4b) for the closure film 2.
  • the wall thickness w is preferably at most 3 to 4 mm wide, in particular the wall thickness is in the range from 0.5 to 1.5 mm.
  • these openings are designed as grooves 12, 13.
  • the grooves are open in the direction of the sealing film to be applied and take up eyebrows 6, possibly also at least part of the sealed sealing wax.
  • the grooves extend over the entire container wall in its upper region, that is, longitudinally to the container wall.
  • the container wall is designed as a rib-shaped, protruding projection 16, FIG. 4a.
  • the sealing film 2 is pressed against the container wall 9, the material of the container wall projection is melted away by a distance S.
  • the melting process can be triggered by the heating of the sealing film 2 and the heat transferred to the container wall.
  • the sealing wax adhering to the underside of the sealing film is liquefied, the liquid sealing wax pressing the liquid plastic of the container wall into the grooves.
  • the brows 6 are formed, which flow into the two grooves 12, 13 and solidify there.
  • the sealing film 2 is pressed against the container wall 9 by a predetermined distance S.
  • the distance S is chosen in particular as a function of the wall thickness w of the container wall.
  • the grooves 12, 13 also receive at least part of the sealing lacquer, which is heated when the sealing film and the container wall are connected, so that, if necessary, only a small amount of the sealed seal paint remains inside the container or settles on the outside of the container.
  • This configuration of the container wall in the area of the support surface also ensures that the melted brows are also connected to the grooves on their side facing the sealing film in the opening area of the grooves.
  • the area of the connection between the container wall and the sealing film is thus expanded over the cross section of the projection 16 and the connection is strengthened.
  • the contact surface 10 or melting zone is of the same width over the entire circumference of the container wall, whereby a uniformly strong connection between the film and the container wall is achieved.
  • FIG. 5 shows a further embodiment of the container according to the invention, the opening in the container wall in the region of the later support surface being formed by bevels 14, 15.
  • the protrusion 16 between the bevels 14 and 15 is partially melted, as in the embodiment shown in FIG. 4, when the sealing film and the container wall are connected, so that brow 6 is again formed. These brows 6 are taken up by the bevels.
  • the containers according to the invention therefore do not have a specially designed sealing edge, rather the sealing film lies directly on the container wall, which has the same cross-section in the area of the support surface as in a region adjoining it downwards or as in the rest of the container wall.
  • the width of the support surface is therefore at most equal to the wall thickness w of the container wall.
  • the container wall usually consists of plastic, while the sealing film usually consists of aluminum or plastic.
  • the sealing film adheres uniformly to the wall of the container.
  • the majority of the sealing wax 3 is torn away by tearing off the sealing film 2.
  • the container wall 9 has exactly one depression 1 in the area of the bearing surface 10.
  • the parts of the container wall adjoining the recess 11 are then designed such that the flow of the melt of the container wall material and / or the flow of the material 3 connecting the sealing film 2 and the container wall 9 is conveyed into the recess 11.
  • the parts of the container wall adjoining the depression are designed to be inclined in the direction of the depression.
  • the wall thickness w of the container wall is preferably in the range of 0.5-1.5 mm.
  • the projection 16 (FIGS. 4, 5, 6), which is at least partially melted off, has a width of, for example, 0.3 mm and a height of 0.2 mm.
  • the route S ie the so-called seal path, is the distance between the position of the sealing head shown in FIG. 6a and the upper horizontal edge of the stop a and corresponds approximately to half the height of this projection. It is approximately 0.1 mm.
  • the pressure P is not relevant in the context of the present invention, since the sealing head is pressed fully onto a stop a (FIG. 6).
  • a cup according to the invention is produced by first positioning the closure film (2) on the container wall in the region of a support surface.
  • the container wall has no sealing edge, rather the container wall in the area of the bearing surface has the same wall thickness w as in the area of the container wall adjoining it downwards.
  • the container has the shape shown in Figures 4-6 and is manufactured in particular by injection molding.
  • the sealing film is heated to a predetermined temperature at least in the area of the support surface and then the sealing film heated to the predetermined temperature is pressed against the container wall.
  • the sealing film according to the invention is pressed onto the container wall by a predetermined distance S after it has been positioned on the contact surface.
  • the sealing head 1 is moved the distance S to the stop a, the heated sealing film 2 presses on the projection 16, which partially melts.
  • the sealing wax is pushed away to the left and right in the region of the projection 16 (FIG. 6).
  • the heated sealing wax in turn presses the melted container wall material into the openings (11, 12, 13, 14, 15).
  • the grooves are about 0.1 mm deep and about 0.1 mm wide.
  • the predefined distance S is chosen in particular as a function of the wall thickness w of the container wall in the area of the support surface.
  • Typical values for the specified temperature of the sealing head or of the sealing film contacted by the sealing head is approximately 150-180 ° C. if the container wall made of polystyrene (PS) is used. If the container wall is made of polypropylene (PP), the sealing head temperature or the temperature to which the sealing film is heated is approximately 200 ° C. It can also be provided that when using polypropylene the sealing head is pressed a little longer onto the sealing film or the container wall.
  • the sealing film typically consists of aluminum blanks which have an approximately 0.05 mm thick sealing wax layer on their side facing the container.
  • the aluminum foil itself is approx. 0.2 mm thick.
  • the invention is generally applicable to containers which can be releasably covered with a sealing film.
  • a preferred area of application is yogurt cups, containers for other dairy products and other foodstuffs.
  • the invention is also applicable to containers for cosmetics and other products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Closures For Containers (AREA)
  • Closing Of Containers (AREA)
  • Glass Compositions (AREA)

Abstract

La présente invention concerne un récipient ainsi qu'un procédé pour le fabriquer. Le récipient est constitué par une paroi latérale, avec une surface de support d'une feuille de fermeture (2) qui peut être fixée sous l'effet de la chaleur, de façon amovible, à cette surface de support, sur la paroi latérale du récipient. Selon l'invention, la paroi latérale du récipient est en matière plastique et la largeur de la surface de support est au maximum égale à l'épaisseur de paroi (w) du récipient. Le rebord de fermeture existant sur les pots selon l'état de la technique est supprimé. La surface de support présente au moins une gorge (11, 12, 13) qui fait le tour et qui est destinée à recevoir la matière (6) constituant la paroi du récipient qui est repoussée lorsqu'est établie la liaison entre la feuille de fermeture et la paroi du récipient. La gorge peut aussi recevoir de la matière d'un produit (3) qui réunit la feuille de fermeture et la paroi latérale du récipient. Selon l'invention, le pot est fabriqué de la manière suivante: mise en place de la feuille de fermeture sur la surface de support, chauffage de cette feuille, au moins dans la zone de la surface de support, jusqu'à une température déterminée, puis compression de la feuille contre la paroi latérale du récipient, sur une distance déterminée (S).
PCT/EP1996/001562 1995-04-13 1996-04-12 Recipient et son procede de fabrication WO1996032341A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96914908A EP0820413A1 (fr) 1995-04-13 1996-04-12 Recipient et son procede de fabrication
DE29619269U DE29619269U1 (de) 1995-04-13 1996-04-12 Behälter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19514072A DE19514072C2 (de) 1995-04-13 1995-04-13 Behälter und Verfahren zu dessen Herstellung
DE19514072.9 1995-04-13

Publications (1)

Publication Number Publication Date
WO1996032341A1 true WO1996032341A1 (fr) 1996-10-17

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ID=7759670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/001562 WO1996032341A1 (fr) 1995-04-13 1996-04-12 Recipient et son procede de fabrication

Country Status (3)

Country Link
EP (1) EP0820413A1 (fr)
DE (2) DE19514072C2 (fr)
WO (1) WO1996032341A1 (fr)

Cited By (1)

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US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

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DE19741882A1 (de) * 1997-09-23 1999-03-25 4P Rube Goettingen Gmbh Verfahren zum Herstellen eines Behälters und damit hergestellter Behälter
DE19813846A1 (de) * 1998-03-27 1999-10-14 4P Rube Goettingen Gmbh Verfahren zum Versiegeln eines Behälters
DE10145624A1 (de) * 2001-09-15 2003-04-10 Bosch Gmbh Robert Verfahren und Vorrichtung zur Herstellung von gefüllten versiegelten Behältern und gefüllter versiegelter Behälter
DE10147565A1 (de) * 2001-09-26 2003-04-10 Varta Microbattery Gmbh Vorrichtung zum gas- und flüssigkeitsdichten Versiegeln der Gehäuse von galvanischen Elementen
GB0624404D0 (en) * 2006-12-06 2007-01-17 D2 Food Systems Ltd Food Container
CA2791638C (fr) * 2009-03-16 2017-08-29 1/4 Vin Verre a vin, procede de conditionnement du vin, et conteneur de vin
FR2942948A1 (fr) * 2009-03-16 2010-09-17 1 4 Vin Verre a vin et procede de conditionnement du vin
FR3133600B1 (fr) * 2022-03-21 2024-03-22 1/4 Vin Procédé de thermoscellage d’un opercule sur un contenant en matière plastique
GB2621969B (en) * 2022-05-16 2024-08-28 Sharp Interpack Ltd Packaging tray with sealing flange

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EP0252792A1 (fr) * 1986-07-09 1988-01-13 MECAPLASTIC Société Anonyme française Machine pour la fermeture d'une barquette, ou autre récipient de conditionnement, par soudure d'un film en matière thermoplastique sur les bords d'un tel récipient
DE3733133A1 (de) * 1987-10-01 1989-04-13 Aluminium Walzwerke Singen Becher aus kunststoff mit einer deckfolie

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method
US11325760B2 (en) 2014-07-16 2022-05-10 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

Also Published As

Publication number Publication date
DE19514072A1 (de) 1996-10-17
DE29619269U1 (de) 1997-01-09
EP0820413A1 (fr) 1998-01-28
DE19514072C2 (de) 1998-04-09

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