EP1975076A1 - Boîte en fer et son procédé de fabrication - Google Patents

Boîte en fer et son procédé de fabrication Download PDF

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Publication number
EP1975076A1
EP1975076A1 EP07006330A EP07006330A EP1975076A1 EP 1975076 A1 EP1975076 A1 EP 1975076A1 EP 07006330 A EP07006330 A EP 07006330A EP 07006330 A EP07006330 A EP 07006330A EP 1975076 A1 EP1975076 A1 EP 1975076A1
Authority
EP
European Patent Office
Prior art keywords
conical
opening portion
tin
edge portion
lid
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.)
Granted
Application number
EP07006330A
Other languages
German (de)
English (en)
Other versions
EP1975076B1 (fr
Inventor
Friedhelm Pilarski
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.)
Impress Verpackungen Erftstadt GmbH and Co KG
Original Assignee
Impress Verpackungen Erftstadt GmbH and Co KG
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 Impress Verpackungen Erftstadt GmbH and Co KG filed Critical Impress Verpackungen Erftstadt GmbH and Co KG
Priority to DE502007000938T priority Critical patent/DE502007000938D1/de
Priority to EP07006330A priority patent/EP1975076B1/fr
Priority to ES07006330T priority patent/ES2325638T3/es
Priority to AT07006330T priority patent/ATE434570T1/de
Publication of EP1975076A1 publication Critical patent/EP1975076A1/fr
Application granted granted Critical
Publication of EP1975076B1 publication Critical patent/EP1975076B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/42—Details of metal walls
    • B65D7/48—Local reinforcements, e.g. adjacent closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2041—Pull tabs
    • B65D2577/205—Pull tabs integral with the closure

Definitions

  • the present invention relates to a can with an axial weld, a central cylindrical portion and a sealable with a lid of a sheet material conical opening portion.
  • the invention also relates to a method for producing such a tin can, comprising the steps of: bending a plate-shaped starting material to form a cylindrical sheet metal blank, longitudinal welding along the longitudinal sides of the sheet metal blank to form a cylindrical sheet metal blank with the axial weld and forming the opening portion of the welded sheet metal blank Shapes a conical opening section.
  • a cylindrical tin can having a support ring formed on the opening and carrying a peelable lid is well known.
  • the support ring of this prior art can has a portion projecting from the inner peripheral surface of the can and extending perpendicular to the longitudinal axis of the can. This section forms a support surface for attaching the lid.
  • the support ring is connected to the tin can at the upper end of the opening portion by crimping this end. Due to the Tragerings the emptying of the can is difficult. When tilting the can to empty the contents prevents the projecting portion of the support ring easy and consumer friendly emptying. Thus, depending on the flow properties of the material received in the can, the consumer sometimes has to reach in for emptying the can with his finger. This can lead to cuts due to the formed of a sheet metal support ring.
  • This generic prior art proposes to form the can having a central cylindrical portion, a conical opening portion, and a neck formed between the conical opening portion and the central cylindrical portion.
  • the cylindrically shaped retraction connects at its front end to the conical opening portion of the generic box.
  • the lid On the inner circumferential surface of the conical opening portion, the lid is sealed to close the can.
  • the upper end of the central cylindrical section connects via a tapered section at the lower end of the feeder.
  • the conical opening section tends to be deformed when the lid is removed.
  • the conical opening portion is taken along by a conical edge portion of the lid until the applied by the consumer force to pull off the lid solves the connection between the conical opening portion and the conical edge portion.
  • a deformed conical opening section makes it difficult to controlled draining the tin can.
  • Another object of the present invention is to provide a tin can which allows a controlled and consumer-friendly emptying. Another object of the present invention is to provide a method of manufacturing such a can.
  • the device-related aspect of the present invention is achieved with a can according to claim 1, characterized by means for stiffening the conical opening section.
  • the means may be formed, for example, by at least one stiffening element formed on the outer peripheral surface of the conical opening portion.
  • the means is mainly formed so as to prevent deformation of the tapered opening portion due to a tensile load acting on the tapered opening portion.
  • the means is formed in the circumferential direction between the conical opening portion and the central cylindrical portion in the form of a stiffening bead.
  • the stiffening bead runs, for example, along the entire circumference of the tin can.
  • the stiffening bead is formed, for example, as a stiffening bead projecting radially outwardly from the outer circumference of the tin can and projecting beyond the outer circumferential surface of the central cylindrical portion.
  • the stiffening bead has, for example, a substantially triangular shape when viewed longitudinally, preferably with rounded edges or transitions.
  • the stiffening bead projects inwards towards the longitudinal axis of the tin can and has a radius of curvature of between 1 mm to 3 mm.
  • the stiffening bead is thus formed according to this preferred embodiment as a projecting on the inner peripheral surface of the tin box radially inwardly curved stiffening bead.
  • the stiffening bead connects with its first end directly to the conical opening portion and with its second end directly to the central cylindrical portion.
  • the stiffening bead is thus arranged directly in the vicinity of the conical opening portion, whereby a stiffening of the entire conical opening portion is achieved.
  • This arrangement of the stiffening bead in close proximity to the conical opening portion and the central cylindrical portion also leads to a more compact construction of the tin.
  • the transition from the first end to the conical opening portion and from the second end to the central cylindrical portion each have a radius of curvature of between 0.8 mm and 1.6 mm.
  • the inner circumferential surface of the central cylindrical portion via the curved projecting stiffening bead toward the conical opening portion is thereby formed continuously, i. there is no kink or any other discontinuity along the inner peripheral surface of the can, which could retain the product stored in the can.
  • the lid has a circular base and a conical edge portion, and the outer peripheral surface of the rim portion abuts completely with interposition of a thermoplastic sealing layer on the inner circumferential surface of the conical opening portion.
  • the diameter of the circular base preferably corresponds substantially to the diameter of the central cylindrical portion and the lower end of the conical opening portion.
  • the length of the conical edge portion preferably corresponds to the length of the conical opening portion.
  • the preformed conical edge portion of the lid extends parallel to the conical inner peripheral surface of the opening portion.
  • thermoplastic sealant layer is preferably formed on the basis of polyethylene. This preferred Embodiment allows for optimal material usage and provides excellent hermetic sealing.
  • the conical edge portion and the conical opening portion are each offset by 8 ° to 12 ° relative to the longitudinal axis of the tin can to the outside. Since the angle between the edge portion and the longitudinal axis of the tin can and between the conical opening portion and the longitudinal axis of the tin can between 8 ° and 12 ° in longitudinal section of the tin can, a particularly good adhesion between the edge portion and the conical opening portion is achieved. Also, the insertion and attachment of the lid to the conical opening portion is favored by this angle.
  • a formed on the conical edge portion Abziehlasche is formed, which allows the removal of the lid.
  • the pull tab is preferably from the outer edge of the conical edge portion. Since the can according to the present invention comprises means for stiffening the conical opening portion, the pull tab can thus be formed at the conical edge portion without having to fear deformation of the conical opening portion of the can when removing the lid.
  • the means for stiffening the conical opening portion thus also has the advantage that the Abziehlasche instead of on the circular base of the lid, which covers the opening of the tin box, consumer-friendly can be formed directly on the conical edge portion of the lid.
  • the pull tab is formed integrally with the conical edge portion by cutting out the foil material and arched such that a first portion of the pull tab extends parallel to the conical edge portion and a second portion of the pull tab parallel to the circular base. Due to the one-piece design of lid and pull tab, the material is used optimally. Since the pull tab is arched so as to substantially follow the shape of the conical edge portion and the circular base, this also forms a preferred compact arrangement of the pull tab.
  • the pull-tab is preferably arcuate such that the respective first and second portions abut the conical edge portion and the circular base. Only when opening the can, the pull tab is lifted by the consumer, before she takes one space-saving and compact position immediately adjacent; preferably adjacent to the top of the lid.
  • the procedural problem is solved according to the present invention by a method according to claim 10, which is characterized by molding a means for stiffening the conical opening portion.
  • the conical opening portion is preferably deformed by being concreted to obtain the conical opening portion with a predetermined angle between the conical opening portion and the longitudinal axis of the can.
  • the opening portion is preferably bent around in such a way that its front end projects beyond the lateral surface of the central cylindrical portion.
  • a conical opening portion is formed by reshaping, the diameter of which continuously increases toward its front end. The smallest diameter of the conical opening portion is thus formed at its lower end.
  • the means for stiffening the conical opening portion is formed, for example, by attaching stiffening elements to the outer periphery of the tin can.
  • the stiffening elements can be prepared as separate components and attached to the sheet metal blank or formed integrally on the sheet material of the sheet metal blank.
  • the means is formed by reshaping the sheet material of the can between the conical opening portion and the central cylindrical portion in the form of a stiffening bead. This stiffening bead is preferably formed completely along the circumference of the sheet metal blank.
  • the sheet metal blank is pressed inwardly between the conical opening portion and the central cylindrical portion inwardly toward the longitudinal axis of the sheet blank so that the stiffening bead is formed with a radius of curvature between 1 mm and 3 mm.
  • the stiffening bead By forming to form the stiffening bead not only prevents the conical opening portion deformed when removing the lid, but also that the conical opening portion in subsequent processing steps of the sheet metal blank, for example, when attaching the lid or filling the tin box, not deformed.
  • a particularly preferred embodiment of the present invention is characterized by cutting the lid with a peel tab from the film material and forming the lid to form a circular base and a conical edge portion, wherein at least the conical edge portion forming portion of the film material is coated with a thermoplastic sealant layer.
  • the film material is preferably an aluminum foil from which the lid is cut out.
  • the lid is cut in one piece with the pull tab.
  • the cut-out lid is provided by a tool provided for this purpose deformed such that the conical edge portion is formed along the entire circumference of the circular base surface, wherein the Abziehlasche extends from a portion of the edge portion.
  • the sealing layer is preferably formed by a polyethylene layer and is preferably applied along the entire inner peripheral surface of the conical edge portion.
  • the lid is preferably reshaped such that the diameter of the circular base area substantially corresponds to the diameter at the lower end of the conical opening portion.
  • the length of the conical edge portion preferably corresponds to the length of the conical opening portion.
  • the step of forming the lid comprises deep-drawing the cover to form the circular base and the conical edge portion such that the conical edge portion is formed smooth.
  • the deep drawing is carried out with a conical tool, whereby the lid is formed reliably and dimensionally accurate.
  • the lid is reshaped so that the conical edge portion is smooth or wrinkle-free, i. strictly corresponds to the outer peripheral surface of a truncated cone. The thus preformed lid ensures that the conical edge portion is applied under optimal conditions to the conical opening portion with the interposition of the sealing layer. The occurrence of air bubbles and thus the weakening of the seal to be produced is reliably prevented.
  • the method is characterized by grasping the reshaped lid with a heatable die which heats the thermoplastic sealant layer upon transferring the formed lid to the welded blank, inserting the unshaped lid into the conical mouth portion of the welded blank, applying of the conical edge portion to the conical inner peripheral surface of the opening portion such that the conical edge portion with the interposition of the heated thermoplastic sealing layer completely applied to the conical inner peripheral surface and hermetically sealed, the conical opening portion of the welded sheet blank, whereby the sealed with the lid tin can.
  • the unshaped lid is preferably sucked by vacuum on the stamp and transferred to the sheet metal blank.
  • the stamp is preferably permanently heated to the thermoplastic Heat seal layer and melt.
  • the lid with the heated sealing layer is then inserted into the conical opening portion, and the conical edge portion is applied to the inner peripheral surface of the conical opening portion with interposition of the heated thermoplastic sealing layer for hermetically sealing the opening.
  • the tapered edge portion is pressed by a predetermined force against the inner peripheral surface of the conical edge portion, to thereby obtain a uniform distribution of the sealing layer between the inner peripheral surface of the conical opening portion and the inner peripheral surface of the tapered edge portion.
  • the lid Since the lid is already preformed with the smooth conical edge portion, the lid can be quickly and reliably inserted and applied.
  • a stable and reliable seal is provided in a very short time by the combination of preforming of the edge portion to obtain a smooth, wrinkle-free edge portion and complete application of the smooth conical edge portion to the conical opening portion.
  • the stiffening bead contributes to the fact that the conical opening portion is not deformed during the processing of the sheet metal blank. It is therefore ensured that the preformed conical edge portion can be fully applied to the conical opening portion. A subsequent adjustment of the conical edge portion is not necessary.
  • Compared to the EP 0 700 838 B1 is achieved by introducing the preformed with a conical edge portion lid a considerable time savings.
  • a hat-shaped lid In the generic state of the art, a hat-shaped lid must first be inserted so that its outer edge folds over and abuts against the inner peripheral surface of the conical opening portion. This is time consuming and involves the disadvantage that the lid can not be mounted precisely enough on the conical opening portion. Therefore, the generic method can not achieve complete abutment of the edge portion of the lid with the inner peripheral surface of the conical opening portion. There is thus the danger that the lid will come off the tin.
  • the lid In addition, in the generic method, the lid must first be inserted and applied to the inner peripheral surface of the tapered opening portion before the sealing layer can be heated. The productivity of this known method is therefore low. Further, wrinkles may form in the edge portion of the lid since it has not been preformed.
  • the cover is inserted in such a way that the lower edge of the conical edge section is arranged in the region of the transition from the first end of the stiffening bead to the conical opening section.
  • the lower edge of the conical edge portion of the lid is thus directly attached to the transition from the first end of the stiffening bead to the conical opening portion.
  • the radially inwardly curved stiffening bead forms the smallest inner diameter of the tin can and prevents the lid from being fed in too far along the longitudinal axis of the tin can.
  • the stiffener bead contributes to accurate and reliable positioning of the lid. This ensures that the conical edge portion of the lid rests completely and in a positionally accurate manner on the inner peripheral surface of the conical opening portion.
  • the stamper applies the conical edge portion to the colder inner peripheral surface of the opening portion and is removed before the sheet reaches the melting temperature of the sealing layer.
  • the sealing layer By heating the sealing layer during transfer, it is ensured that the stamp reliably attaches the cover to the welded tin can.
  • the lid is heated substantially only during transfer. Since the preheated conical edge portion of the lid is applied to the colder sheet, the lid is sealed directly onto the can.
  • the pull tab formed on the conical edge portion is reshaped such that a first portion of the pull tab extends parallel to the conical edge portion and a second portion of the pull tab extends parallel to the circular base. Since the pull-tab is turned over only after the conical edge portion has been applied and then sealed, a uniform force distribution is ensured by the punch at the conical edge portion during application since the pull tab is not interposed between the punch and the outer peripheral surface of the conical edge portion. By bending the pull tab a particularly compact arrangement of the same is achieved.
  • the conical edge portion for positive attachment to the conical Opening portion by 8 ° to 12 ° relative to the longitudinal axis of the tin and the conical opening portion formed by 8 ° to 12 ° relative to the longitudinal axis of the tin can to the outside.
  • Fig. 1 shows a longitudinal sectional view of a molded tinplate tin 2 with an axial weld, not shown, a central cylindrical portion 4 and a formed aluminum foil cover 6.
  • the cover 6 seals a conical opening portion 8 of the tin 2.
  • the bottom portion 10 of the tin can 2 has a feeder 12 and is closed by a bottom 14 formed of tinplate.
  • Fig. 2 shows an enlarged view of the upper portion of the tin box 2.
  • the opening portion 8 is conical and connects at its lower end 16 directly to the first end of an inwardly curved stiffening bead 9 (see also Fig. 4M ).
  • the diameter of the conical opening portion increases from its lower end 16 to its upper end 18 to continuously, so that the inner peripheral surface 20 of the conical opening portion 8 is free of heels.
  • a bead 22 is formed, which projects beyond the lateral surface 24 of the central cylindrical portion 4.
  • the inner peripheral surface 20 extending between the lower and upper ends 16, 18 forms a contact surface for a conical edge portion 26 of the lid 6.
  • the length of the edge portion 26 corresponds to the length L of the conical opening portion 8 (see Fig. 4L ).
  • the lid 6 also has a circular base surface 28 which has a diameter which substantially corresponds to that of the central cylindrical portion 4. Between the inner circumferential surface 30 of the edge portion 26 (see Fig. 5B ) and the inner peripheral surface 20 of the opening portion 8, an aluminum-polyethylene-molded sealing layer 32 is formed.
  • the stiffening bead 9 formed on the inner circumference of the tin can 2 (see in particular FIG Figure 4M ) has a radius of curvature R2 of about 2 mm, and its first end directly adjoins the lower end 16 of the conical opening portion 8.
  • the second end of the stiffening bead 9 immediately adjoins the upper end of the middle cylindrical portion 4.
  • the transition from the first end of the stiffening bead 9 to the conical opening portion 8 and from the second end of the stiffening bead 9 to the central cylindrical portion 4 each has a radius of curvature R1 of approximately 1.2 mm.
  • the length S of the reinforcing bead 9 in the direction of the longitudinal axis B is measured from the lower end 16 of the conical opening portion 8 to the upper end of the central cylindrical portion 4.
  • the length S is about 4.5 mm.
  • the lower end 16 of the conical opening portion 8 is in alignment with the upper end of the central cylindrical portion 4.
  • An angle ⁇ between the inner peripheral surface 20 of the conical opening portion 8 and an axis A offset parallel to the longitudinal axis B of the tin box 2 is 9 ° (see FIG Fig. 6A ).
  • An angle ⁇ between the conical edge portion 26 and the axis A is also 9 ° (see Fig. 6A ).
  • Fig. 3 For a simplified illustration, only a longitudinal sectional view of the cover 6 is shown.
  • a pull tab 34 is formed integrally in the longitudinal extent of a portion of the conical edge portion 26.
  • Abziehlasche 34 shown is arcuate and has a first parallel to the conical edge portion 26 extending portion 36 and a second parallel to the base 28th extending section 38.
  • Fig. 3 also shows the sealing layer 32 formed on the inner peripheral surface of the skirt portion 26.
  • Fig. 4A shows a welded from tinplate and along its longitudinal sides double hull 40, which serves as a starting material for the production of the tin box 2.
  • the double hull 40 is separated along a dividing line 42 into individual sheet metal blanks 44 (see Fig. 4B ).
  • the upper end portion 46 of the sheet blank 44, along which the separation process is performed, relative to the longitudinal axis of the sheet metal blank 44 is formed to the outside. This slight deformation is in Fig. 4C shown in more detail.
  • FIG. 4D shows how subsequently the other end portion 48, ie the bottom portion 48 of the sheet metal blank 44 is retracted to a as in Fig. 4E shown cylindrical indentation 50 having a smaller diameter than the central cylindrical portion 4.
  • the sheet metal blank 44 is then as in Fig. 4F Shown at both end portions 46 and 48 simultaneously crimped to form upper and lower outwardly bulging edge portions 52 and 54, respectively.
  • FIGS. 4G shows that the upper edge portion 52 is formed by further reshaping the upper end portion 46 as a rounded edge portion 52.
  • Fig. 4H shows the bottom portion 48 after the bead, in which the rounded lower edge portion 54 is formed.
  • FIG. 15 shows the step of forming the tapered opening portion 8.
  • the sheet blank 44 is deformed after being both-side crimping by butting immediately following the lower end of the upper edge portion 52.
  • the opening portion 8 is formed at an angle of 9 °.
  • the upper end 18 of the conical opening portion 8 closes as in FIG Fig. 4J shown immediately and paragraph free at the upper rounded edge portion 52 and the lower end 16 of the conical opening portion also connects directly and paragraph-free to the central cylindrical portion 4 at.
  • the conifying only the immediately adjacent to the lower end of the rounded edge portion 52 area is transformed.
  • the rounded upper edge portion 52 is further processed subsequently to bevel to form the bead 22.
  • the conical opening portion 8 is formed so that its diameter continuously increases from its lower end 16 to its upper end 18 and thus forms a smooth surface.
  • the conical opening portion 8 thus has the length L (see Fig. 4L ).
  • Fig. 4K shows that immediately after the conification, the upper edge portion 52 is radially rolled, whereby the bead 22 as in Fig.4L is formed, which extends over the lateral surface 24.
  • Figure 4M shows that after forming the bead 22, the stiffening bead 9 is formed radially inwardly with respect to the sheet blank 44.
  • the stiffening bead 9 is formed by forming so that both the transition to the conical opening portion 8 and the transition to the central cylindrical portion 4 has a radius of curvature R1.
  • the shaped stiffening bead 9 has a radius of curvature R2.
  • Fig. 5A shows the cut out of an aluminum foil cover 6 in its initial state.
  • the lid 6 is cut in one piece with the pull tab 34 and then formed by deep drawing, so that the conical edge portion 26 is wrinkle-free.
  • At least the portion of the aluminum foil which forms the conical edge portion 26 is coated with a sealing layer 32 formed of polyethylene, so that the inner peripheral surface 30 of the conical edge portion 26 is coated (see FIG. Fig. 3 ).
  • the deep-drawn and coated lid 6 is detected by a sealing die, not shown, and transferred for attachment to the conical opening portion 8 of the sheet metal blank 44 to this.
  • the upper side of the base surface 28 is sucked in by the sealing punch.
  • the polyethylene layer 32 is heated by the heated sealing die.
  • Fig. 6A shows how the provided with the heated polyethylene layer 32 cover 6 is inserted into the opening of the sheet metal blank 44.
  • the lid 6 is inserted concentrically with the longitudinal axis of the can and applied to the inner peripheral surface 20 of the conical opening portion 8, so that the inner peripheral surface 30 of the conical edge portion 26 completely with the interposition of the polyethylene layer 32 at this is applied.
  • a reliable seal is achieved. In particular, this prevents the conical edge section 26 from being drawn off from the conical opening section 8 as a result of the removal of the sealing punch.
  • the sheet in the conical opening portion 8 Since the sheet in the conical opening portion 8 has a temperature far below the melting temperature of the polyethylene layer 32, it absorbs the heat energy discharged through the polyethylene layer 32.
  • the conical edge portion 26 is pressed against the conical opening portion 8 by the conical side of the sealing die, whereby a uniform distribution of the polyethylene layer 32 between the conical edge portion 26 and the conical opening portion 8 is achieved.
  • Fig. 6B shows a side view of the can 2 with protruding Abziehlasche 34 after sealing. How out Fig. 6C As can be seen, the conical edge portion 26 abuts completely against the conical opening portion 8.
  • the pull tab 34 is bent so that the first portion 36 parallel to the conical edge portion 26 and the second portion 38 parallel to the base 24 as in Fig. 3 shown extends.
  • the obtained tin can 2 is then turned over and filled with non-sterilizable products, such as peanuts or coffee and then closed in a conventional manner with a shaped bottom plate 14.
EP07006330A 2007-03-27 2007-03-27 Boîte en fer et son procédé de fabrication Active EP1975076B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502007000938T DE502007000938D1 (de) 2007-03-27 2007-03-27 Blechdose und ein Verfahren zur Herstellung derselben
EP07006330A EP1975076B1 (fr) 2007-03-27 2007-03-27 Boîte en fer et son procédé de fabrication
ES07006330T ES2325638T3 (es) 2007-03-27 2007-03-27 Bote de chapa y procedimiento para la fabricacion del mismo.
AT07006330T ATE434570T1 (de) 2007-03-27 2007-03-27 Blechdose und ein verfahren zur herstellung derselben

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07006330A EP1975076B1 (fr) 2007-03-27 2007-03-27 Boîte en fer et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP1975076A1 true EP1975076A1 (fr) 2008-10-01
EP1975076B1 EP1975076B1 (fr) 2009-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07006330A Active EP1975076B1 (fr) 2007-03-27 2007-03-27 Boîte en fer et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP1975076B1 (fr)
AT (1) ATE434570T1 (fr)
DE (1) DE502007000938D1 (fr)
ES (1) ES2325638T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2973001A1 (fr) * 2011-03-22 2012-09-28 Sodetech Sarl Procede de formage de la paroi de l'embouchure d'un recipient ou emballage metallique, dispositif a cet effet et emballage ou recipient obtenu
WO2012152608A1 (fr) * 2011-05-06 2012-11-15 Crown Packaging Technology, Inc. Élément pelable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0700838B1 (fr) 1994-09-06 1998-06-10 Societe Des Produits Nestle S.A. Boíte avec fermeture sous forme de films et procédé pour sa fabrication
WO2004083066A1 (fr) 2003-03-18 2004-09-30 Werner Grabher Boite a obturation par membrane
WO2006092364A2 (fr) 2005-03-01 2006-09-08 Crown Packaging Technology, Inc Boite d'emballage et procede et appareil pour sa fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0700838B1 (fr) 1994-09-06 1998-06-10 Societe Des Produits Nestle S.A. Boíte avec fermeture sous forme de films et procédé pour sa fabrication
WO2004083066A1 (fr) 2003-03-18 2004-09-30 Werner Grabher Boite a obturation par membrane
WO2006092364A2 (fr) 2005-03-01 2006-09-08 Crown Packaging Technology, Inc Boite d'emballage et procede et appareil pour sa fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2973001A1 (fr) * 2011-03-22 2012-09-28 Sodetech Sarl Procede de formage de la paroi de l'embouchure d'un recipient ou emballage metallique, dispositif a cet effet et emballage ou recipient obtenu
US9016098B2 (en) 2011-03-22 2015-04-28 Sodetch Sarl Process for forming the wall of the mouth of a metal container or packaging, device for this purpose and packaging or container obtained
WO2012152608A1 (fr) * 2011-05-06 2012-11-15 Crown Packaging Technology, Inc. Élément pelable

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ES2325638T3 (es) 2009-09-10
DE502007000938D1 (de) 2009-08-06
EP1975076B1 (fr) 2009-06-24

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