US20040079654A1 - Packaging container - Google Patents

Packaging container Download PDF

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Publication number
US20040079654A1
US20040079654A1 US10/370,095 US37009503A US2004079654A1 US 20040079654 A1 US20040079654 A1 US 20040079654A1 US 37009503 A US37009503 A US 37009503A US 2004079654 A1 US2004079654 A1 US 2004079654A1
Authority
US
United States
Prior art keywords
beaker
deep
bottom part
shaped bottom
edge
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.)
Abandoned
Application number
US10/370,095
Other languages
English (en)
Inventor
Hans-Peter Kleiner
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.)
Solutia Solar GmbH
Original Assignee
Etimex Primary Packaging GmbH
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 Etimex Primary Packaging GmbH filed Critical Etimex Primary Packaging GmbH
Assigned to ETIMEX PRIMARY PACKAGING GMBH reassignment ETIMEX PRIMARY PACKAGING GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLEINER, HANS-PETER
Publication of US20040079654A1 publication Critical patent/US20040079654A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/261—Handling means, e.g. transfer means, feeding means
    • B29C51/262—Clamping means for the sheets, e.g. clamping frames
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching

Definitions

  • the invention relates to a packaging container having a beaker-shaped bottom part to hold package goods, which bottom part has an upper edge defining a beaker opening and a lid which closes said beaker opening, preferably hermetically, and which is preferably in the form of a ring-pull lid of metal.
  • Such packaging containers are in use in diverse forms in the form of ring-pull cans for packaging food.
  • the beaker-shaped bottom part of these packaging containers is, as also the ring-pull lid itself, made of sheet zinc or sheet aluminum or aluminum foil and receives its shape by subjection to a deep-drawing process.
  • packaging containers of metal guarantee that the beaker-shaped bottom part and the lid member can be made to fit to each other In a precise manner, so that particularly sensitive packaged goods, such as foodstuffs, can be provided with guaranteed safe protection by reason of the excellent seal which can be achieved between the ring-pull lid and the beaker-shaped bottom part.
  • a packaging container of the above type in which the bottom part is a deep-drawn plastics beaker which has a deep-drawn shaped upper edge of calibrated wall thickness and forms a substantially no-play receiver for the lid.
  • the lid is, in particular, a ring-pull lid, which makes it possible to open the packaging container without the assistance of tools.
  • a ring-pull lid is taken to mean any type of lid made of metal sheet and/or metal foil and frequently having an annular lid edge which can be sealingly connected to the upper edge of the bottom part and also has a frequently round middle area, which is separably connected to the lid edge.
  • a handle in the form of a flap or ring, with the aid of which the middle area can be detached from the lid edge along a specified interface line and the package thus opened.
  • the beaker-shaped bottom parts are, of course, not limited to shapes exhibiting radial symmetry but can equally well have an oval or nearly rectangular beaker opening.
  • the upper edge of calibrated wall thickness provides the prerequisite for processing the packaging containers of the invention on existing packaging plants in the same way as prior art packaging containers having a metallic bottom part
  • Deep drawing causes displacement of material leading to the formation of a bulge of accumulated material at the upper edge of the beaker-shaped bottom part, which cannot be controlled in conventional contrivances. Deep drawing of plastics sheets thus always involves a change in the wall thickness, particularly at the edge. As a result there are inadmissable variations in the size of the internal diameter, and in the thickness of the beaker edge, so that sealing problems arise when fixing the ring-pull lid.
  • the packaging container of the invention is thus only made possible by a process for the production thereof which is likewise subject matter of this invention and will be described in greater detail below, and in which the manufacturing process also involves calibration of the edge surrounding th beaker opening in a single step.
  • the side walls of the beaker-shaped bottom part are preferably slightly inclined outwardly.
  • Another characteristic facilitating the separation of the stacked bottom parts is achieved by the provision of a projection in the region of the beaker edge on the inside thereof, which projection can, for example, run around the inside of the beaker at a given level so that the external surface of the succeeding beaker bears against the same. In this way the area of material contact between two successive beakers is reduced to a minimum, which decreases the risk of stacked beakers becoming jammed.
  • the beaker-shaped bottom part of the packaging container of the invention has a marginal area which widens radially outwardly from the side wall of the beaker.
  • the projection intended as bearing surface for the outside wall of the succeeding beaker in the stack is disposed in this radially outwardly widened marginal area.
  • plastics materials satisfying such demands are known to the person skilled in the art.
  • polypropylene, high-density polyethylene, and crystalline polyesters are suitable.
  • Calibration of the thickness of the edge of the beaker-shaped bottom part of plastics material is preferably carried out with a tolerance of ⁇ 0.03 mm or less, particularly ⁇ 0.02 mm or less, based on a thickness of the edge of 0.4 mm. This permits secure closure with conventional ring-pull lids and, following sterilization of the sealed packaging container, guarantees maintenance of the sterility of the packaged goods over a long storage period.
  • a translucent or even transparent embodiment of th beaker-shaped bottom part is a particularly preferred goal, which is readily achieved with the solution of the invention. This is particularly advantageous when packaging foodstuffs, since the customers can be directly furnished with an optical impression of the packaged goods.
  • Plastics sheets particularly well-suited for the production of translucent or transparent beaker-shaped bottom parts are, for example, polypropylene sheets. The portion of the beaker-shaped bottom part defining ist capacity is determined, in known manner, by the top ram.
  • the deep-drawing sheet is preheated in conventional manner before insertion into the deep-drawing die to a temperature just below its crystallite melting point, which in the case of polypropylene sheets is approximately 155° C.
  • the depresser and the circumferential, downwardly extending ring-shaped projection for calibrating the thickness of the edge of the beaker-shaped bottom part are first of all moved down to their respective working positions, after which the deep-drawing sheet is shaped by the top ram to form a beaker-shaped bottom part.
  • Another preferred embodiment makes use of a depresser exhibiting, adjacent to the shoulder, a circumferential, downwardly extending, ring-shaped projection for calibrating the thickness of the edge of the beaker-shaped bottom part so that calibration and displacement of material are carried out at the edge of the beaker-shaped bottom part in a single process step together with clamping of the deep-drawing sheet in the deep-drawing die.
  • the circumferential, downwardly projecting projection provided for calibrating purposes is cooled during calibration and also during the deep-drawing operation itself.
  • FIG. 1 is a sectional view through a deep-draw contrivance for the production of the packaging container of the inv ntion and, for comparison, a deep-drawing contrivance illustrating th process of the prior art;
  • FIG. 2 is a detailed view of a contrivance for carrying out the process of the invention for the production of a packaging container of the invention
  • FIG. 3 is a detailed view of a packaging container of the invention.
  • FIG. 1 shows on its right-hand side a conventional deep-drawing contrivance denoted by the general reference mark 10 and described below in detail.
  • a novel deep-drawing contrivance 110 contain, with which the process of the invention can be carried out and a packaging container of the invention can be produced.
  • the conventional deep-drawing device 10 has a deep-drawing die 12 having a forming shoe 14 , a depresser 16 , a top ram 18 , a blanking die 20 , and a cutting punch 22 .
  • the deep-drawing operation is started by placing a deep-drawing sheet 24 in the deep-drawing device 10 such that it can be fixed, when depresser 16 is depressed, in a position between an upper edge 26 of the forming shoe 14 , which forms a seat, and the depresser 16 or its edge which completely surrounds the forming shoe 14 and the hollow mold present therein.
  • top ram 18 is moved downwardly so as to deform the preheated sheet 24 and press it into the cavity of forming shoe 14 and thus form a beaker-shaped bottom part for a package.
  • the remaining excess edge material of the deep-drawing sheet is then sh ared off by blanking plate 20 , which is moved downwardly against cutting die 22 to cut out the beaker-shaped bottom part from the deep-drawing sheet.
  • the top ram 18 is then moved upwardly and deep-drawing die 12 is opened by raising base plate 13 , after which the resulting beaker-shaped bottom part is pressed out from shaping die 12 or forming shoe 14 by means of an ejector 28 .
  • the next deep-drawing operation can then take place, this again commencing with the insertion of the preheated deep-drawing sheet 24 .
  • the deep-drawing device 110 has a deep-drawing die 112 which can be divided into an upper part, which is held in a base plate 113 for executing vertical up and down movements, and a lower part holding a forming shoe 114 , in order to be able to place a preheated deep-drawing sheet 124 in the deep-drawing device when in this open position.
  • the upper part of the deep-drawing die is here again composed of a depresser 116 and an associated blanking die 120 , similar to that previously described in detail for the conventional deep-drawing die 12 .
  • the deep-drawing process of the invention also requires a cutting punch 122 for cooperation with blanking die 120 in order to make it possible to shear sheet residues from the beaker-shaped bottom part after the deep-drawing operation.
  • an ejector 128 ejects the beaker-shaped bottom part out of the forming shoe 114 before a new deep-drawing operation can take place.
  • the deep-drawing device 110 of the invention differs from the conventional deep-drawing device 10 in that the region of depresser 116 and the upper edge of forming shoe 114 is differently designed, as is illustrated in greater detail in the enlarged-scale drawing shown in FIG. 2, which represents the detail X of FIG. 1 (mirrored). In particular, this again shows the fundamental structure of the deep-drawing device with its forming shoe 114 , depresser 116 , blanking die 120 , and cutting punch 122 .
  • the embodiment of the depresser 116 shown here has a circumferential shoulder 130 , which is prestressed against a bearing surface 132 and clamps and fixes the deep-drawing sheet 124 (not shown) between itself and said bearing surface 132 .
  • the preferred embodiment of the depresser 116 shown here exhibits a downwardly projecting circumferential projection 134 which adjoins the shoulder 130 radially inwardly thereof, and which, together with a wall surface extending radially inwardly from seat 132 , forms and calibrates an upper edge of the beaker-shaped bottom part.
  • the projection 134 is cooled and forms, in the embodiment shown, a single unit with the shoulder of the depresser 116 .
  • the shoulder 130 of depresser 116 is inevitably also in a cooled state.
  • multi-impression molds are used, by means of which, for example, 16 beaker-shaped bottom parts or beakers can be simultaneously formed.
  • the aforementioned possibility of achieving narrow tolerances becomes particularly significant in the case of such multi-impression molds.
  • FIG. 3 The result of such forming of a beaker-shaped bottom part of the invention is illustrated in FIG. 3, which will be described in detail below.
  • a peculiarity of the deep-drawing device illustrated in FIG. 2 is that in this case it is not the forming shoe 114 which forms the bearing surface for the deep-drawing sheet but rather forming shoe 114 ends with its inside wall flush against a recess 140 in cutting punch 122 below wall surface 136 , which is responsible for shaping the marginal area at the perimeter of the beaker-shaped bottom part.
  • the side wall 136 here is simultaneously part of cutting punch 122 , as is also bearing surface 132 .
  • the side wall 136 which is substantially vertical, is downwardly adjoined, toward the base of the beaker-shaped bottom part ie toward the bottom 142 of the beaker cavity of forming shoe 114 , by another shoulder 144 , which extends radially inwardly and which, in the closed state of the deep-drawing die as shown in FIG. 2, maintains an adequate distance to the top of projection 134 so that displacement of material can be readily absorbed in the space between projection 134 and shoulder 144 . Since, in the region of shoulder 144 , side wall 136 recedes from the inside wall of projection 134 , there is free space at this point, which remains available even when the top ram (cf FIG.
  • the base 142 of forming shoe 114 is connected to shoulder 144 by a vertically slightly inclined side wall 146 , which makes it possible to form readily stackable beaker-shaped bottom parts of the invention.
  • FIG. 3 shows in detail the form of the top marginal area 150 and a beaker-shaped bottom part 152 , shown only partially.
  • the upper marginal area 150 defines, as illustrated, the beaker opening and is subsequently closed when the packaging container is sealed with a (ring-pull) lid (not illustrated).
  • the edge 150 comprises an upper, substantially radially outwardly projecting flange 154 adjoined, via a curved portion, by a side wall 156 of calibrated thickness d. Adjoining the top edge 156 downwardly toward the base of the beaker the marginal area 150 exhibits a a bulge of accumulated material 158 , which is caused by displacement of material occurring during calibration of the top edge 156 .
  • the bulge 158 also serves to prevent the beaker-shaped bottom parts 152 from touching each other at their bottoms when stacked so that separation of said bottom parts from each other for packaging purposes is very simply effected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Closures For Containers (AREA)
  • Closing Of Containers (AREA)
US10/370,095 2002-03-05 2003-06-11 Packaging container Abandoned US20040079654A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10210907.9 2002-03-05
DE10210907A DE10210907A1 (de) 2002-03-05 2002-03-05 Verpackungsbehälter

Publications (1)

Publication Number Publication Date
US20040079654A1 true US20040079654A1 (en) 2004-04-29

Family

ID=27771216

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/370,095 Abandoned US20040079654A1 (en) 2002-03-05 2003-06-11 Packaging container

Country Status (6)

Country Link
US (1) US20040079654A1 (de)
EP (1) EP1346920B1 (de)
AT (1) ATE399719T1 (de)
DE (2) DE10210907A1 (de)
DK (1) DK1346920T3 (de)
ES (1) ES2307839T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20060579A1 (it) * 2006-08-04 2008-02-05 Pibergroup Srl Contenitore di materiale plastico stampato, suo procedimento di fabbricazione e relativo stampo.

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126029A (en) * 1964-03-24 Englesson
US3128029A (en) * 1957-05-09 1964-04-07 St Regis Paper Co Cup
US3396868A (en) * 1966-10-24 1968-08-13 Dow Chemical Co Container
US3531555A (en) * 1963-03-01 1970-09-29 Haskon Inc Process for forming foamed containers
US3703255A (en) * 1970-02-12 1972-11-21 Scott Paper Co Plastic container having expanded side wall
US4350263A (en) * 1980-09-19 1982-09-21 H. P. Hood, Inc. Package having sealed closing means
US4383815A (en) * 1981-03-12 1983-05-17 Adolf Illig Maschinenbau Gmbh & Co. Molding tool
US4738374A (en) * 1985-08-16 1988-04-19 Ole Ingemann Container
US5257709A (en) * 1988-03-29 1993-11-02 Dai Nippon Insatsu Kabushiki Kaisha Container provided with metallic cover and method and apparatus for manufacturing the same
US5662237A (en) * 1996-08-27 1997-09-02 Cain; Deron M. Container for transport or storage of food articles
US5810197A (en) * 1996-10-30 1998-09-22 Mazzarolo; Ivonis Plastic container and lid with tab
US5931332A (en) * 1996-03-12 1999-08-03 Mygatt; Leonard T. Tamper-evident closure with pull-tab
US6170696B1 (en) * 1996-03-04 2001-01-09 The Glad Products Company Sealing container

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215348B (de) * 1961-01-25 1966-04-28 Bastert Werke Vorrichtung zum Herstellen von Bechern mit konischer Wandung aus einer Kunststoffolie
DE1486225A1 (de) * 1964-06-05 1969-06-12 Bellaplast Gmbh Duennwandiges,aus thermoplastischer Kunststoff-Folie tiefgezogenes Gefaess mit Verschlussdeckel,beispielsweise Speiseeis-Becher,Schuettelbecher od.dgl.
DE7003610U (de) * 1970-02-03 1970-07-02 Eichele Hubert Plastikdose mit einem luftdicht verschliessbaren deckel.
AT338164B (de) * 1973-01-04 1977-07-25 Bebo Plastik Gmbh Becher, insbesondere eisbecher
AT336483B (de) * 1974-09-16 1976-08-15 Hinteregger Kg P Verpackung aus tiefgezogener kunststoff-folie
GB2055737A (en) * 1979-07-06 1981-03-11 Cross Paperware Ltd Storage of beverage concentrate
DE3936891A1 (de) * 1989-11-06 1991-05-08 Illig Maschinenbau Adolf Formwerkzeug zum herstellen von bechern aus einer erwaermten thermoplastischen kunststoffolie

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126029A (en) * 1964-03-24 Englesson
US3128029A (en) * 1957-05-09 1964-04-07 St Regis Paper Co Cup
US3531555A (en) * 1963-03-01 1970-09-29 Haskon Inc Process for forming foamed containers
US3396868A (en) * 1966-10-24 1968-08-13 Dow Chemical Co Container
US3703255A (en) * 1970-02-12 1972-11-21 Scott Paper Co Plastic container having expanded side wall
US4350263A (en) * 1980-09-19 1982-09-21 H. P. Hood, Inc. Package having sealed closing means
US4383815A (en) * 1981-03-12 1983-05-17 Adolf Illig Maschinenbau Gmbh & Co. Molding tool
US4738374A (en) * 1985-08-16 1988-04-19 Ole Ingemann Container
US5257709A (en) * 1988-03-29 1993-11-02 Dai Nippon Insatsu Kabushiki Kaisha Container provided with metallic cover and method and apparatus for manufacturing the same
US6170696B1 (en) * 1996-03-04 2001-01-09 The Glad Products Company Sealing container
US5931332A (en) * 1996-03-12 1999-08-03 Mygatt; Leonard T. Tamper-evident closure with pull-tab
US5662237A (en) * 1996-08-27 1997-09-02 Cain; Deron M. Container for transport or storage of food articles
US5810197A (en) * 1996-10-30 1998-09-22 Mazzarolo; Ivonis Plastic container and lid with tab

Also Published As

Publication number Publication date
DK1346920T3 (da) 2008-11-03
ES2307839T3 (es) 2008-12-01
ATE399719T1 (de) 2008-07-15
EP1346920B1 (de) 2008-07-02
EP1346920A2 (de) 2003-09-24
EP1346920A3 (de) 2006-05-10
DE10210907A1 (de) 2003-09-25
DE50310055D1 (de) 2008-08-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ETIMEX PRIMARY PACKAGING GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KLEINER, HANS-PETER;REEL/FRAME:014165/0846

Effective date: 20030519

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION