EP0820413A1 - Container and method of producing the same - Google Patents

Container and method of producing the same

Info

Publication number
EP0820413A1
EP0820413A1 EP96914908A EP96914908A EP0820413A1 EP 0820413 A1 EP0820413 A1 EP 0820413A1 EP 96914908 A EP96914908 A EP 96914908A EP 96914908 A EP96914908 A EP 96914908A EP 0820413 A1 EP0820413 A1 EP 0820413A1
Authority
EP
European Patent Office
Prior art keywords
container wall
container
sealing
wall
support surface
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP96914908A
Other languages
German (de)
French (fr)
Inventor
Hermann Meili
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Albiplast AG
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
Publication of EP0820413A1 publication Critical patent/EP0820413A1/en
Withdrawn legal-status Critical Current

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
    • B29C66/05—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
    • B29C66/01—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
    • B29C66/70—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.

Abstract

The invention concerns a container and a method of producing the same. The container comprises a lateral container wall with a support surface for a closure foil (2) which can be detachably connected to the lateral container wall at the support surface under the effect of heat. According to the invention, the lateral container wall is made of plastics, and the width of the support surface is at most equal to the thickness (w) of the container wall. There is no need for a so-called sealing edge, as used in the case of prior art pots. The support surface comprises at least one peripheral depression (11, 12, 13) for accommodating container wall material (6) which is displaced during the connection of the closure foil and container wall. The depression can also receive material of a product (3) connecting the closure foil and the lateral container wall. According to the invention, the pot is produced in that the closure foil is positioned on the support surface, is heated at least in the region of the support surface to a predetermined temperature and is then pressed by a predetermined distance (S) onto the lateral container wall.

Description

Behälter und Verfahren zu dessen Herstellung Containers and process for their manufacture
Die Erfindung betrifft einen Behälter nach dem Oberbegriff des Patentan¬ spruchs 1 sowie ein Verfahren zu dessen Herstellung nach dem Oberbegriff des Patentanspruchs 6.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.
Insbesondere betrifft die Erfindung Behälter für Lebensmittel wie beispiels¬ weise Molkereiprodukte.In particular, the invention relates to containers for foodstuffs such as dairy products.
Ein großer Teil der heute in Bechern oder becherähnlichen Behältern ver¬ kauften Milchprodukte, aber auch andere "Food-" und "Nonfood-" Produkte müssen luftdicht verschlossen auf den Markt gelangen, wobei nicht in jedem Fall eine Gasdichtheit gefordert ist. Die bekannten Becher weisen für einen derartigen Verschluß eine Becherwandung auf, die im Bereich der Auflage- fläche einer Verschlußfolie verstärkt ausgeformt ist und insbesondere einen nach außen überstehenden sogenannten Siegelrand aufweist. Ein solcher Siegelrand besteht typischerweise wie die Becherwandung aus Kunststoff und hat zum Beispiel eine Breite von ca. 2 mm bis 4 mm und eine Dicke von 0,5 mm bis 1,5 mm. Die Becherwandung hat dabei üblicherweise eine Wanddicke von 0,5 mm bis 1 ,5 mm.A large part of the milk products sold today in cups or cup-like containers, but also other "food" and "non-food" products have to reach the market in an airtight manner, gas tightness not being required in every case. For such a closure, 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. Such 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.
Die bekannten Becher werden mit einer Aluminiumplatine verschlossen, die an ihrer dem Becher zugewandten Seite mit einem Haftmittel beschichtet ist.The known cups are closed with an aluminum plate which is coated with an adhesive on its side facing the cup.
Typischerweise wird als Haftmittel ein Siegellack verwendet, der aus einem Kunststofflack mit tiefem Schmelzpunkt oder alternativ hierzu aus einem Heißkleber besteht. Als Verschlußfolie kann anstelle einer Aluminiumplatine auch eine Kunststoffolie verwendet werden.Typically, 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. Instead of an aluminum plate, a plastic film can also be used as the sealing film.
Zum Verschließen der Becher mit der jeweiligen Verschlußfolie wird diese flach auf den Becher positioniert und durch einen sogenannten Siegelkopf solange erwärmt, bis sich der Siegellack partiell verflüssigt. Im Anschluß daran wird die Verschlußfolie mit einer definierten Kraft gegen den Siegel¬ rand gedrückt. Die in der Verschlußfolie und im geschmolzenen Siegellack enthaltene Wärmeenergie bringt dabei den Kunststoffsiegelrand partiell zum Schmelzen. Im Ergebnis wird eine innige Verbindung zwischen Verschlußfo¬ lie, Siegellack und Siegelrand hergestellt.To close the cup with the respective sealing film, it is positioned flat on the cup and heated by a so-called sealing head until the sealing wax partially liquefies. The sealing film is then pressed against the sealing edge with a defined force. The heat energy contained in the sealing film and in the melted sealing wax partially melts the plastic seal edge. The result is an intimate connection between the sealing foil, sealing wax and sealing edge.
Die beispielsweise aus der EP 0 252 792 AI bekannten Becher und das bekannte Verfahren haben den Nachteil, daß die Becher notwendigerweise den zuvorgenannten Siegelrand aufzuweisen haben. Die Kosten für das Material des Siegelrandes verteuern die Kosten des Bechers. Wird der Becher in Spritztechnik hergestellt, erhöht sich zudem die Herstellungszeit gegenüber einem Becher ohne Siegelrand. Hinzu kommen die Kosten für diejenige Fläche der Verschlußfolie, die vorgesehen ist, um den Siegelrand ganz abzudecken.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.
Durch den Siegelrand erhöhen sich auch das Volumen und das Gewicht eines Bechers, wobei auch das Gewicht der zuvorgenannten Fläche der Verschlußfolie beiträgt, die vorgesehen ist, um den Siegelrand ganz ab- zudecken. Die Erhöhung des Volumens und des Gewichts eines Bechers erhöhen zudem die Transportkosten.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.
Ein weiterer Nachteil der bekannten Becher besteht darin, daß aufgrund des relativ großen Materialaufwandes für Becher und Verschlußfolie erhöhte Aufwendungen für die Entsorgung zu erbringen sind. Ein weiterer Nachteil der bekannten Becher besteht darin, daß sich die Verschlußfolie in vielen Fällen schwer bzw. ungleichmäßig von dem Becher ablösen läßt, da die Folie unterschiedlich auf dem Becher anhaftet.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.
Auch erweist sich ein solcher Siegelrand als nicht mundgerecht, so daß Becher mit einem derartigen Siegelrand nicht ohne weiteres als Trinkgefäße verwendbar sind.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.
Ein weiterer Nachteil der bekannten Becher besteht darin, daß bei der Verbindung von Verschlußfolie und Becherwandung unter Einsatz vonAnother disadvantage of the known cups is that when using the sealing film and cup wall using
Wärmeenergie auch ein Teil des Becherwandungsmaterials schmilzt, das sich innen und außen am Becher absetzt.Thermal energy also melts part of the cup wall material, which deposits on the inside and outside of the cup.
Das außerhalb des Bechers erkaltete Becherwandungsmaterial (Brauen) kann selbst bei einer kaum sichtbaren Ausformung zu Verletzungen führen.The cup wall material (brow) cooled outside the cup can lead to injuries even if the shape is barely visible.
Aus JP Patent Abstracts of Japan M-1410, May 17, 1993, Vol. 17, No. 244 ist ein Behälter mit einem Verschluß bekannt, wobei der Behälter im Verschlußbereich eine Stufenstruktur aufweist und wobei eine dort angeord- nete Verschlußfolie in die Behälterwandung eingebettet ist.From JP Patent Abstracts of Japan M-1410, May 17, 1993, Vol. 17, No. 244 a container with a closure is known, the container having a step structure in the closure region and a closure film arranged there being embedded in the container wall.
Aus CH 399 994 ist ein Verbinden von flächig aneinanderliegenden Folien beim Verschließen eines Behälters mit einem Kopfdeckel bekannt. Dabei tritt ein Teil des durch Erwärmung zähflüssig gewordenen Materials des Deckel- randes in Perforierungen der Behälterwandung ein.From CH 399 994 a connection of sheets lying flat against one another when closing a container with a head cover is known. Part of the lid rim material that has become viscous due to heating enters perforations in the container wall.
Aus DE-3 733 133 AI ist ein Becher aus Kunststoff mit einer Deckfolie bekannt, wobei eine Versiegelung der Deckfolie nur im Bereich einer Sicke mittels eines am Siegel Werkzeug angebrachten Formrings erfolgt. Die Sicke ist nicht in Form einer Vertiefung von vornherein vorhanden, sondern entsteht erst beim Verschließen des Bechers.From DE-3 733 133 AI a cup made of plastic with a cover film is known, the cover film being sealed only in the area of a bead by means of a mold ring attached to the sealing tool. The bead is not present from the outset in the form of a depression, but only arises when the cup is closed.
Es sind auch Behälter einer relativ großen Wanddicke (größer als 3 mm) mit einer versiegelten Folienmembran ("Originalitätsverschluß") und einem Schraub- oder Stülpdeckel bekannt. Ein solcher Originalitätsverschluß ("Pri¬ märverschluß") dient dazu, daß der Behälterinhalt nach seiner ursprünglichen Füllung und dem Aufbringen des Originalitätsverschlusses nicht verändert werden kann, und kann aromadicht sein. Diese Behälter, wie sie z.B. aus DE 9108868.2 bekannt sind, beispielsweise Medizin- (Tabletten)-Flaschen weisen aufgrund ihrer großen Wanddicke und der damit verbundenen mecha¬ nischen Stabilität keinen Siegelrand auf. Der Schraub- oder Stülpdeckel bildet einen Sekundärverschluß.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. Such a tamper-evident seal ("primary 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.
Behälter beziehungsweise Behälter und Verfahren zu deren Herstellung sind auch bekannt aus:Containers or containers and methods for their production are also known from:
- EP 04 55 638 AI- EP 04 55 638 AI
- WO 90 09 934 AI - EP 04 05 365 AI- WO 90 09 934 AI - EP 04 05 365 AI
- EP 00 37 101 AI- EP 00 37 101 AI
URS, Ernst: Peelnahtsysteme und deren Herstellung, In: Verpackungsrundschau 11/1994, S. 69-76; JP Patents Abstracts of Japan: - 3-200561 A., M-1184, Nov. 27, 1991, Vol. 15, No. 468;URS, Ernst: Peelnahtsysteme and their production, In: Verpackungsrundschau 11/1994, S. 69-76; JP Patents Abstracts of Japan: - 3-200561 A., M-1184, Nov. 27, 1991, Vol. 15, No. 468;
- 5- 77865 a., M-1453, July 28, 1993, Vol. 17, No. 403;- 5-77865 a., M-1453, July 28, 1993, Vol. 17, No. 403;
- 2-180168 A., M-1031, Sept. 28, 1990, Vol. 14, No. 454. Ausgehend von diesem Stand der Technik liegt der Erfindung das technische Problem zugrunde, einen Behälter und ein Verfahren zu dessen Herstellung zu schaffen, wobei der Materialeinsatz für den Becher minimiert wird.- 2-180168 A., M-1031, Sept. 28, 1990, Vol. 14, No. 454. Starting from this prior art, 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.
Dieses Problem wird erfindungsgemäß durch einen Becher nach Anspruch 1 und durch ein Verfahren nach Anspruch 6 gelöst.This problem is solved according to the invention by a cup according to claim 1 and by a method according to claim 6.
Die Erfindung ist mit einer Mehrzahl von Vorteilen verbunden. Neben der Materialeinsparung von Behältermaterial und Verschlußfolie und dem geringe- ren Energieeinsatz für die Herstellung besteht ein weiterer Vorteil darin, daß der erfindungsgemäße Behälter einerseits dicht verschließbar und andererseits mundgerecht ausgestaltet ist und damit auch als Trinkgefaße geeignet ist.The invention has a number of advantages. In addition to the material saving of the container material and the sealing film and the lower energy input for the production, there is a further advantage that 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.
Die Materialeinsparung wird bei den Ausführungsformen des erfindungs- gemäßen Behälters noch durch Öffnungen in der Behälterwandung erhöht, welche der Aufnahme geschmolzenen Behälterwandungsmaterials dienen.In the embodiments of the container according to the invention, the material saving is further increased by openings in the container wall which serve to hold molten container wall material.
Die Verschlußfolie haftet gleichmäßig an den erfindungsgemäßen Behälter an und lassen sich somit vom Endverbraucher in einfacher Weise von dem Behälter ablösen, ohne daß Reste der Verschlußfolie an dem Behälter haften bleiben.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.
Das bei der erfindungsgemäßen Herstellung abgeschmolzene Behälterwan¬ dungsmaterial gelangt in hierfür vorgesehenen Öffnungen in der Behälter- wandung, so daß ein Kontakt des geschmolzenen Behältermaterials (Kunst¬ stoff) mit Luft vermieden wird. Damit werden auch die Bildung scharfer Brauen (erstarrte Kunststoffreste) und Verletzungen der die Behälter handha¬ benden Personen vermieden, z.B. beim Verkauf der Becher und beim Verzehr der Behälterfüllung. - 6 -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 -
Weitere Ausgestaltungen des erfindungsgemäßen Behälters und des erfin¬ dungsgemäßen Verfahrens sowie weitere Vorteile der Erfindung sind in den Unteransprüchen und in der Beschreibung erläutert.Further refinements of the container according to the invention and of the method according to the invention and further advantages of the invention are explained in the subclaims and in the description.
Die Erfindung wird nun anhand der Zeichnung beschrieben. Es zeigt:The invention will now be described with reference to the drawing. It shows:
Fig. 1 bis 3 Behälter nach dem Stand der Technik, jeweils vor und nach der Verbindung mit einer Verschlußfolie;1 to 3 containers according to the prior art, each before and after connection with a sealing film;
Fig. 4 u. 5 zwei Ausgestaltungen eines erfindungsgemäßen Behälters, eben¬ falls vor und nach der Verbindung mit einer Verschlußfolie; undFig. 4 u. 5 two configurations of a container according to the invention, likewise before and after connection with a sealing film; and
Fig. 6 Schritte des erfindungsgemäßen Verfahrens.Fig. 6 steps of the method according to the invention.
Den becherförmigen Behältern nach dem Stand der Technik, welche in den Fig. 1 bis 3 dargestellt sind, ist gemeinsam, daß diese einen Siegelrand 7 im Bereich der Auflagefläche 10 der Verschlußfolie 2 aufweisen. Dieser Siegelrand 7 ist einstückig mit der Behälterwandung 9 ausgebildet. Weiterhin ist den in den Fig. 1 bis 3 dargestellten Bechern gemeinsam, daß die Verschlußfolie jeweils mit einem definierten Druck P und nach Erwärmung gegen den Siegelrand durch einen Stempel bzw. Siegelkopf 1 gedrückt wird. Die Fläche des Siegelrandes steht dabei in Beziehung zu dem ausübbaren Druck P. Je kleinflächiger der Siegelrand ausgebildet ist, umso kleiner muß auch der ausübbare Druck P sein. Kleine Drücke führen aber zu einem schlechten, unregelmäßigen Wärmeübergang von Siegelkopf auf die Folie und von dort auf den Behälterrand, wobei scharfe Brauen außerhalb des Behäl¬ ters entstehen. - 7 -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. Furthermore, 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. - 7 -
In den Fig. 1 b), 2b) und 3 b) ist dargestellt, daß bei der Verbindung von Siegelrand 7 und Verschlußfolie 2, welche mittels thermischer Energie erfolgt, ein Teil des Behälterwandungsmaterials abgeschmolzen wird. Das abgeschmolzene Behälterwandungsmaterial, sogenannte Brauen 6, werden bei dem Verbindungsvorgang im Inneren des jeweiligen Behälters als auch außen an dem Behälter gebildet. Diese Brauen 6, die sich in das Innere des Behälters erstrecken, und sich auch außen am Behälter ausbilden, führen ebenso wie der abgeschmolzene Siegellack 3 zu den zuvor genannten Proble¬ men.1 b), 2b) and 3 b) show that when the sealing edge 7 and the sealing film 2 are connected, which takes place by means of thermal energy, part of the container wall material is melted off. The melted-off container wall material, so-called brow 6, is formed during the connection process both inside the respective container and on the outside of the container. These brows 6, which extend into the interior of the container and also form on the outside of the container, lead, like the melted sealing wax 3, to the aforementioned problems.
In Fig. 2 ist ein Siegelkopf 1 mit einem Kamm 4 dargestellt. Dieser Kamm hinterläßt auf der Verschlußfolie 2 eine Rille 8 und bewirkt eine nur partielle Siegelung auf dem Siegelrand. Die eigentliche Verbindung zwischen Verschlußfolie und Siegelrand ist damit auf eine relativ kleine Fläche be- grenzt. Dennoch werden auch bei dieser Anordnung Brauen 6 und abge¬ schmolzene Siegellackreste innen im Behälter und auch außerhalb des Behäl¬ ters gebildet.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 zeigt einen Behälter mit einem Siegelrand, wobei auf dem Siegelrand ein Kamm 5 angeordnet ist. Auch bei dieser Ausgestaltung des Behälters nach dem Stand der Technik entstehen wiederum Brauen 6, die sich ebenso wie abgeschmolzene Siegellackreste sowohl als auch außen am Behälter ausbilden.Fig. 3 shows a container with a sealing edge, a comb 5 being arranged on the sealing edge. In this embodiment of the container according to the prior art, brows 6 are again formed, which, like sealed sealing wax residues, form both on the outside and on the container.
Fig. 4 zeigt eine erste Ausgestaltung eines erfindungsgemäßen Behälters, von dem lediglich ein Schnitt durch eine seitliche Behälterwandung 9 dargestellt ist. In der Behälterwandung 9 mit einer Wanddicke w sind in ihrem oberen Bereich, das heißt im Bereich der späteren Auflagefläche 10 (Figur 4b) für die Verschlußfolie 2, mindestens eine Öffnung 13, vorzugsweise zwei Öffnungen (Vertiefungen) 11 bzw. 12 und 13 vorgesehen. Die Wanddicke w ist vorzugsweise maximal 3 bis 4 mm breit, insbesondere liegt die Wanddicke im Bereich von 0,5 bis 1,5 mm.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. In 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.
Diese Öffnungen sind bei dem in Figur 4 dargestellten Ausführungsbeispiel als Nuten 12, 13 ausgebildet. Die Nuten sind in Richtung zu der aufzubrin¬ genden Verschlußfolie offen und nehmen Brauen 6, gegebenenfalls auch mindestens einen Teil abgeschmolzenen Siegellacks auf. Die Nuten erstrecken sich über die gesamte Behälterwandung in deren oberen Bereich, also längs zu der Behälterwandung.In the embodiment shown in FIG. 4, 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.
Zwischen den beiden Nuten ist die Behälterwandung als rippenförmiger, aufragender Vorsprung 16 ausgebildet, Figur 4a. Wie aus Fig. 4b ersicht¬ lich, wird bei der Andrücken der Verschlußfolie 2 gegen die Behälterwan¬ dung 9 um eine Strecke S das Material des Behälterwandungsvorsprungs abgeschmolzen. Der Schmelzvorgang kann durch die Erwärmung der Ver¬ schlußfolie 2 und die auf die Behälterwandung übertragene Wärme ausgelöst werden. Bei dem Schmelzvorgang wird der an der Unterseite der Verschlu߬ folie anhaftende Siegellack verflüssigt, wobei der flüssige Siegellack den flüssigen Kunststoff der Behälterwandung in die Nuten drückt. Bei dieser Ausführungsform des erfindungsgemäßen Bechers werden also die Brauen 6 gebildet, die in die beiden Nuten 12, 13 fließen und dort erstarren.Between the two grooves, the container wall is designed as a rib-shaped, protruding projection 16, FIG. 4a. As can be seen from FIG. 4b, when 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. During the melting process, 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. In this embodiment of the cup according to the invention, the brows 6 are formed, which flow into the two grooves 12, 13 and solidify there.
Bei diesem Verbindungsvorgang wird die Verschlußfolie 2 um eine vor¬ gegebene Strecke S gegen die Behälterwandung 9 gedrückt. Wie noch erläutert wird, wird die Strecke S insbesondere in Abhängigkeit der Wand¬ dicke w der Behälterwandung gewählt.In this connection process, the sealing film 2 is pressed against the container wall 9 by a predetermined distance S. As will be explained below, the distance S is chosen in particular as a function of the wall thickness w of the container wall.
Die Nuten 12, 13 nehmen auch mindestens einen Teil des Siegellacks auf, der bei der Verbindung von Verschlußfolie und Behälterwand erwärmt wird, so daß gegebenenfalls nur noch eine geringe Menge abgeschmolzenen Siegel- lacks im Inneren des Behälters verbleibt bzw. sich außen am Behälter absetzt.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.
Durch diese Ausgestaltung der Behälterwandung im Bereich der Auflage- fläche wird zugleich erreicht, daß die abgeschmolzenen Brauen an ihrer der Verschlußfolie zugewandten Seite im Öffnungsbereich der Nuten ebenfalls mit dieser verbunden werden. Damit wird die Fläche der Verbindung zwischen Behälterwandung und Verschlußfolie über den Querschnitt des Vorsprungs 16 erweitert und die Verbindung verstärkt.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.
Die Auflagefläche 10 bzw. Schmelzzone ist an dem gesamten Umfang der Behälterwandung gleich breit, womit eine gleichmäßig starke Verbindung zwischen Folie und Behälterwandung erzielt wird.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 zeigt eine weitere Ausgestaltung des erfindungsgemäßen Behälters, wobei die Öffnung in der Behälterwandung im Bereich der späteren Auflage¬ fläche durch Abschrägungen 14, 15 gebildet ist.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.
Der Vorsprung 16 zwischen den Abschrägungen 14 und 15 wird wie bei der in Fig. 4 dargestellten Ausführungsform bei der Verbindung von Ver¬ schlußfolie und Behälterwandung partiell abgeschmolzen, so daß wiederum Brauen 6 gebildet werden. Diese Brauen 6 werden von den Abschrägungen aufgenommen.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.
Die erfindungsgemäßen Behälter weisen also keinen besonders ausgebildeten Siegelrand auf, vielmehr liegt die Verschlußfolie unmittelbar auf der Behäl¬ terwandung auf, die im Bereich der Auflagefläche denselben Querschnitt hat wie in einem daran nach unten anschließenden Bereich bzw. wie in der übrigen Behälterwandung. Die Breite der Auflagefläche ist damit maximal gleich der Wanddicke w der Behälterwandung.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.
Die Behälterwandung besteht üblicherweise aus Kunststoff, während die Verschlußfolie üblicherweise aus Aluminium oder aus Kunststoff besteht.The container wall usually consists of plastic, while the sealing film usually consists of aluminum or plastic.
Bei den in den Fig. 4 und 5 dargestellten Ausfuhrungsformen des erfin¬ dungsgemäßen Behälters haftet die Verschlußfolie gleichmäßig an der Behäl¬ terwandung an. Beim Öffnen des Behälters wird durch Wegreißen der Verschlußfolie 2 auch der Großteil des Siegellacks 3 weggerissen. Die dann bloßgelegten Brauen 6, die in den Öffnungen bzw. Vertiefungen 11 (12, 13, 14, 15) lagern, können in dieser Lage jedoch keine Verletzungen bei der Handhabung des Behälters verursachen.In the embodiments of the container according to the invention shown in FIGS. 4 and 5, the sealing film adheres uniformly to the wall of the container. When the container is opened, the majority of the sealing wax 3 is torn away by tearing off the sealing film 2. The then exposed brows 6, which are stored in the openings or depressions 11 (12, 13, 14, 15), cannot cause any injuries when handling the container in this position.
Wie beschrieben, kann auch vorgesehen sein, daß die Behälterwandung 9 im Bereich der Auflagefläche 10 genau eine Vertiefung 1 aufweist. Die an die Vertiefung 11 angrenzenden Teile der Behälterwandung sind dann so ausge¬ staltet, daß der Fluß der Behälterwandungsmaterial-Schmelze und/oder der Fluß des die Verschlußfolie 2 und die Behälterwandung 9 verbindenden Materials 3 in die Vertiefung 11 gefördert wird. Insbesondere sind die an die Vertiefung angrenzenden Teile der Behälterwandung in Richtung auf die Vertiefung geneigt ausgebildet.As described, it can also be provided that 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. In particular, the parts of the container wall adjoining the depression are designed to be inclined in the direction of the depression.
Fig. 6 zeigt den Zusammenhang zwischen der Strecke S, um die die Ver- schlußfolie 2 in Richtung auf die Behälterwandung 9 gedrückt wird, und deren Wanddicke w im Bereich der Auflagefläche. Die Wanddicke w der Behälterwandung liegt vorzugsweise im Bereich von 0,5-1,5 mm. Der Vorsprung 16 (Figuren 4, 5, 6), der mindestens partiell abgeschmolzen wird, hat eine Breite von beispielsweise 0,3 mm und eine Höhe von 0,2 mm. Die Strecke S, d.h. der sogenannte Siegelweg ist die Entfernung zwischen der in Fig. 6a gezeigten Position des Siegelkopfes und der oberen horizontalen Kante des Anschlags a und entspricht ungefähr der halben Höhe dieses Vorsprungs. Es beträgt etwa 0, 1 mm. Der Druck P ist im Rahmen der vorliegenden Erfindung nicht relevant, da der Siegelkopf voll auf einen Anschlag a gepreßt wird (Fig. 6).6 shows the relationship between the distance S, by which the sealing film 2 is pressed in the direction of the container wall 9, and its wall thickness w in the area of the support surface. 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).
Die Herstellung eines erfindungsgemäßen Bechers erfolgt dadurch, daß die Verschlußfolie (2) zunächst auf die Behälterwandung im Bereich einer Auflagefläche positioniert wird. Die Behälterwandung weist keinen Siegelrand auf, vielmehr hat die Behälterwandung im Bereich der Auflagefläche dieselbe Wanddicke w wie im daran nach unten anschließenden Bereich der Behälter¬ wandung. Der Behälter hat die in den Figuren 4-6 dargestellte Form und wird insbesondere im Spritzgußverfahren hergestellt. Die Verschlußfolie wird zumindest im Bereich der Auflagefläche auf eine vorgegebene Temperatur erwärmt und im Anschluß daran wird die auf die vorgegebene Temperatur erwärmte Verschlußfolie gegen die Behälterwandung gedrückt.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.
Während im Stand der Technik die Verschlußfolie mit einer definierten Kraft bzw. Druck P (Figuren 1 bis 3) auf den Siegelrand 7 gepreßt wird, wird erfindungsgemäß die Verschlußfolie nach ihrer Positionierung auf der Aufla¬ gefläche um eine vorgegebene Strecke S auf die Behälterwandung gepreßt. Wenn der Siegelkopf 1 um die Strecke S bis zum Anschlag a gefahren wird, drückt die erwärmte Verschlußfolie 2 auf den Vorsprung 16, der partiell abschmilzt. Der Siegellack wird im Bereich des Vorsprungs 16 nach links und rechts (Fig. 6) weggedrückt. Der erwärmte Siegellack wiederum drückt das geschmolzene Behälterwandungsmaterial in die Öffnungen (11 , 12, 13, 14, 15). Die Nuten sind etwa 0, 1 mm tief und etwa 0,1 mm breit. Die vorgegebene Strecke S wird insbesondere in Abhängigkeit von der Wand¬ dicke w der Behälterwandung im Bereich der Auflagefläche gewählt. Typische Werte für die vorgegebene Temperatur des Siegelkopfes bzw. der von dem Siegelkopf kontaktierten Verschlußfolie beträgt etwa 150-180°C, sofern die Behälterwandung aus Polystyrol (PS) verwendet wird. Besteht die Behälterwandung aus Polypropylen (PP), beträgt die Siegelkopftemperatur bzw. die Temperatur, auf die die Verschlußfolie erwärmt wird, etwa 200°C. Es kann auch vorgesehen sein, daß bei der Verwendung von Polypropylen der Siegelkopf etwas länger auf die Verschlußfolie bzw. die Behälterwandung gepreßt wird.While in the prior art the sealing film is pressed onto the sealing edge 7 with a defined force or pressure P (FIGS. 1 to 3), 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. When 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.
Die Verschlußfolie besteht typischerweise aus Aluminiumplatinen, die an ihrer der Behälter zugewandten Seite eine etwa 0,05 mm dicke Siegellack¬ schicht aufweisen. Die Aluminiumfölie selbst ist ca. 0,2 mm dick.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.
Die Erfindung ist allgemein auf Behälter anwendbar, die lösbar mit einer Verschlußfolie abdeckbar sind. Ein bevorzugtes Anwendungsgebiet sind Yoghurtbecher, Behälter für weitere Molkereiprodukte und sonstige Lebens¬ mittel. Darüber hinaus ist die Erfindung auch auf Behälter für Kosmetika und sonstige Produkte anwendbar. 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. In addition, the invention is also applicable to containers for cosmetics and other products.
BEZUGSZEICHENLISTEREFERENCE SIGN LIST
1 Siegelkopf1 sealing head
2 Verschlußfolie 3 Verbindungsmittel, Siegellack2 sealing film 3 lanyard, sealing wax
4 Kamm auf dem Siegelkopf 24 comb on the sealing head 2
5 Kamm auf dem Siegelrand 75 comb on the seal edge 7
6 Material der Behälterwandung 9, Brauen6 Material of the container wall 9, brows
7 Siegelrand 8 Rille in der Verschlußfolie7 sealing edge 8 groove in the sealing film
9 Behälterwandung9 container wall
10 Auflagefläche10 contact surface
11 Öffnung in der Behälterwandung11 Opening in the container wall
12, 13 Nut 14, 15 Abschrägung12, 13 groove 14, 15 bevel
16 Vorsprung16 head start
P DruckP pressure
S Strecke W Dicke der Behälterwandung S distance W thickness of the container wall

Claims

Patentansprüche claims
1. Behälter mit einer seitlichen Behälterwandung (9) und mit einer Aufla¬ gefläche (10) für eine Verschlußfolie (2), die an der Auflagefläche mit der seitlichen Behälterwandung unter Wärmeeinwirkung lösbar verbindbar ist, d a d u r c h g e k e n n z e i c h n e t, daß die seitliche Behälterwandung (9) aus Kunststoff besteht, daß die Breite der Auflagefläche (10) maximal gleich der Wand¬ dicke (w) der seitlichen Behälterwandung (9) ist, und daß die Auflagefläche (10) der seitlichen Behälterwandung (9) mindestens eine umlaufende Vertiefung (11) aufweist, die Material (6) der seitlichen Behälterwandung (9), welches bei der Verbindung der Verschlußfolie (2) mit der Auflagefläche (10) der seitlichen Behälterwan¬ dung (9) verdrängt wird, und/oder Material eines die Verschlußfolie (2) und die seitliche Behälterwandung (9) verbindenden Mittels (3) auf¬ nimmt.1. Container with a lateral container wall (9) and with a support surface (10) for a sealing film (2) which is releasably connectable to the support surface with the lateral container wall under the action of heat, characterized in that the lateral container wall (9) Plastic consists of the width of the support surface (10) being at most equal to the wall thickness (w) of the side container wall (9) and that the support surface (10) of the side container wall (9) has at least one circumferential recess (11), the material (6) of the lateral container wall (9), which is displaced when the sealing film (2) is connected to the support surface (10) of the lateral container wall (9), and / or material of the sealing film (2) and the lateral container wall (9) connecting means (3) takes up.
2. Behälter nach Anspruch 1 , dadurch gekennzeichnet, daß die umlaufende Vertiefung (11) durch mindestens eine Nut (12, 13) gebildet ist.2. Container according to claim 1, characterized in that the circumferential recess (11) is formed by at least one groove (12, 13).
3. Behälter nach Anspruch 1, dadurch gekennzeichnet, daß die umlaufende Vertiefung (11) durch eine Abschrägung (14, 15) der seitlichen Behäl¬ terwandung (9) gebildet ist. 3. Container according to claim 1, characterized in that the circumferential recess (11) is formed by a bevel (14, 15) of the lateral container wall (9).
4. Behälter nach einem der vorhergehenden Ansprüche, dadurch gekenn¬ zeichnet, daß die Verschlußfolie (2) aus Aluminium oder Kunststoff besteht.4. Container according to one of the preceding claims, characterized gekenn¬ characterized in that the sealing film (2) consists of aluminum or plastic.
5. Behälter nach einem der vorhergehenden Ansprüche, dadurch gekenn¬ zeichnet, daß die Auflagefläche (10) einen umlaufenden, rippenartigen Vorsprung (16) aufweist, dessen Breite kleiner als die Wanddicke (w) der seitlichen Behälterwandung (9) ist und zu dessen beiden Seiten jeweils eine Vertiefung (11) angeordnet ist.5. Container according to one of the preceding claims, characterized gekenn¬ characterized in that the bearing surface (10) has a circumferential, rib-like projection (16), the width of which is smaller than the wall thickness (w) of the lateral container wall (9) and the two of which Sides each have a recess (11) is arranged.
6. Verfahren zur Herstellung eines Behälters nach einem der Ansprüche 1 bis 5, bei dem eine Verschlußfolie (2) dadurch mit einer seitlichen Behälterwandung (9) verbunden wird, daß die Verschlußfolie (2) auf einer Auflagefläche (10) positioniert wird, und daß die Verschlußfolie (2) in dem Bereich, in dem die Verschlußfolie (2) mit der seitlichen6. A method for producing a container according to one of claims 1 to 5, in which a closure film (2) is connected to a side container wall (9) in that the closure film (2) is positioned on a support surface (10), and in that the sealing film (2) in the area in which the sealing film (2) with the lateral
Behälterwandung (9) verbunden wird, auf eine vorgegebene Temperatur erwärmt und gegen die Auflagefläche (10) der Behälterwandung (9) gedrückt wird, dadurch gekennzeichnet, daß die Verschlußfolie (2) nach ihrer Positionierung auf derContainer wall (9) is connected, heated to a predetermined temperature and pressed against the bearing surface (10) of the container wall (9), characterized in that the sealing film (2) after its positioning on the
Auflagefläche (10) um eine vorgegebene Strecke (S) auf die seitliche Behälterwandung (9) gedrückt wird, und daß geschmolzenes Behälter¬ wandungsmaterial in mindestens eine umlaufende Vertiefung (11) der Auflagefläche (10) der seitlichen Behälterwandung (9) fließt.Contact surface (10) is pressed onto the side container wall (9) by a predetermined distance (S), and that molten container wall material flows into at least one circumferential recess (11) of the contact surface (10) of the side container wall (9).
Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die vorgege¬ bene Strecke (S) in Abhängigkeit von der Wanddicke (w) der seitlichen Behälterwandung (9) im Bereich der Auflagefläche (10) gewählt wird. A method according to claim 6, characterized in that the predetermined distance (S) is selected as a function of the wall thickness (w) of the lateral container wall (9) in the area of the bearing surface (10).
EP96914908A 1995-04-13 1996-04-12 Container and method of producing the same Withdrawn EP0820413A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19514072 1995-04-13
DE19514072A DE19514072C2 (en) 1995-04-13 1995-04-13 Containers and process for their manufacture
PCT/EP1996/001562 WO1996032341A1 (en) 1995-04-13 1996-04-12 Container and method of producing the same

Publications (1)

Publication Number Publication Date
EP0820413A1 true EP0820413A1 (en) 1998-01-28

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Application Number Title Priority Date Filing Date
EP96914908A Withdrawn EP0820413A1 (en) 1995-04-13 1996-04-12 Container and method of producing the same

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EP (1) EP0820413A1 (en)
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WO (1) WO1996032341A1 (en)

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DE19813846A1 (en) * 1998-03-27 1999-10-14 4P Rube Goettingen Gmbh Process for sealing a container
DE10145624A1 (en) * 2001-09-15 2003-04-10 Bosch Gmbh Robert Filled and sealed thermoplastic container production involves creation of a sealing seam bulge around the container rim onto which a film is sealed by a sealing plate profile wider than the bulge
DE10147565A1 (en) * 2001-09-26 2003-04-10 Varta Microbattery Gmbh Device for gas and liquid-tight sealing of the housing of galvanic elements
GB0624404D0 (en) * 2006-12-06 2007-01-17 D2 Food Systems Ltd Food Container
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ES2400356T3 (en) * 2009-03-16 2013-04-09 1/4 Vin Wine glass, wine packing procedure, and wine container
GB2528289A (en) 2014-07-16 2016-01-20 Kraft Foods R&D Inc A die-cut lid and associated container and method
FR3133600B1 (en) * 2022-03-21 2024-03-22 1/4 Vin METHOD FOR HEAT SEALING A LID ON A PLASTIC CONTAINER
GB2621969A (en) * 2022-05-16 2024-03-06 Sharp Interpack Ltd Packaging tray with sealing flange

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DE29619269U1 (en) 1997-01-09
DE19514072C2 (en) 1998-04-09
WO1996032341A1 (en) 1996-10-17

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