DK149487B

DK149487B - RECTANGULAR SCALE CONTAINER WITH A COAT OF FILM MATERIAL AND PROCEDURE FOR THE SAME PREPARATION

Info

Publication number: DK149487B
Application number: DK9582A
Authority: DK
Inventors: Peter Stenzel
Original assignee: Alcan Ohler Gmbh
Priority date: 1981-01-13
Filing date: 1982-01-12
Publication date: 1986-06-30
Also published as: LU83872A1; NL8200121A; BE891778A; DE3100761A1; FR2497771A1; SE458921B; DK9582A; DE3100761C2; DK149487C; GB2091205A; SE8200082L; CH653640A5; FR2497771B1

Description

149687149687

Opfindelsen angår en rektangulær skålformet beholder med et låg af foliemateriale, som er forbundet med beholderens underdel ved sam-menbertling på alle sider med en rundtgående i hjørnerne afrundet randflange på underdelen, specielt en bakke til levnedsmidler. Opfin-5 delsen angår desuden en fremgangsmåde til fremstilling af en sådan beholder.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a rectangular bowl-shaped container with a cover of foil material, which is connected to the bottom of the container by means of jointing on all sides with a rounded edge flange on the bottom part, in particular a food tray. The invention further relates to a method of making such a container.

Fra tysk offentliggørelsesskrift nr. 21 39 588 kendes en tyndvægget beholder til færdige retter, hvilken beholders låg, der består af aluminiumsfolie, på de korte sider har gribetunger, der er falset 10 bagover på lågets overside. Til dannelse af gribetungerne benyttes der ved fremstillingen af dette låg et rektangulært foliestykke, hvis fire hjørner skæres af. Desuden er der i ombukningsområdet af det kendte låg udformet indsnit på fire parvis over for hinanden liggende steder, idet indsnittene er forbundet parvis via foldeiinjer. Herved 15 skal opnås, at de to gribetunger ved åbning af beholderen efter oplukning af disse, kan bøjes opefter langs de forberedte foldelinjer, hvorefter låget skal trækkes af beholderen i lågets plan, idet randflangen på begge de lange sider af beholderen skal virke som føringer.From German Publication No. 21 39 588 a thin-walled container for ready-made dishes is known, which container lid, which consists of aluminum foil, has on the short sides gripping tongues which are folded backwards on the top side of the lid. In order to form the gripping tongues, a rectangular foil piece is used in the manufacture of this lid, the four corners of which are cut off. In addition, in the bending area of the known lid, incisions are formed in four opposite locations, the incisions being connected in pairs via folding lines. Hereby it is to be achieved that the two gripping tongs, when opening the container after opening them, can be bent upwards along the prepared fold lines, after which the lid must be pulled by the container in the plane of the lid, with the rim flange on both long sides of the container acting as guides.

20 En ulempe ved den kendte udformning er, at foliestykket for dannelsen af gribetungerne først skal underkastes en skæreoperation.A disadvantage of the known design is that the foil piece for forming the gripping tongues must first be subjected to a cutting operation.

Desuden har det vist sig, at ombukningen af låget langs de to langsider i de fleste tilfælde ligger så tæt an mod beholderens randflange, at en skuffelignende udskubning af låget er meget vanskelig eller slet 25 ikke mulig. I øvrigt fører en sådan udtrækning af låget uvilkårligt til en tilsmudsning af spisepladsen, eftersom der på undersiden af låget hænger madrester, som under udtrækningsprocessen drypper af.In addition, it has been found that in most cases the folding of the lid along the two long sides is so close to the rim flange of the container that a drawer-like pushing of the lid is very difficult or not at all possible. Moreover, such extraction of the lid inevitably leads to a contamination of the dining area, as food residues which drip during the extraction process hang on the underside of the lid.

Fra tysk fremlæggelsesskrift nr. 13 00 061 kendes en beholder med et låg af foliemateriale, som fremstilles af et rektangulært foliestykke.From German Patent Specification No. 13 00 061 a container with a lid of foil material is known which is made of a rectangular foil piece.

30 Til dannelse af tre afrivningstunger udformes der på én af de korte sider indsnit i længderetningen før påsætningen af låget på beholderen, så at de tre afrivningstunger efter sammenbertlingen med beholderens randflange rager op fra lågets overside. Når beholderen skal åbnes, ødelægges låget ved hjælp af disse afrivningstunger. Bortset 149487 2 fra, at dette kendte låg under fremstillingen ligeledes skal underkastes en skæreoperation, skal det ødelægges for at beholderen kan åbnes, hvorved det aldrig kan undgås, at madrester, der hæfter fast på lågets underside, sprøjter omkring som følge af reaktion s kraften.30 To form three tear-off tongues, on one of the short sides longitudinal incisions are formed before the lid is applied to the container, so that the three tear-off tongues protrude from the upper side of the lid after the joint with the container flange. When the container is to be opened, the lid is destroyed by these tearing tongues. Apart from the fact that this known lid during manufacture must also undergo a cutting operation, it must be destroyed in order to open the container, so that food residues adhering to the underside of the lid can never be sprayed as a result of reaction force .

5 Opfindelsen har til formål at udforme en beholder med et låg af foliemateriale og af den indledningsvis nævnte art på en sådan måde, at låget kan løsnes fra beholderen uden at blive ødelagt, og uden at man som følge af en vanskeligt gennemførlig åbning skal frygte for tilsmudsning som følge af madrester, der drypper af, eller væsker, der 10 sprøjter omkring.The invention has for its object to design a container with a cover of foil material and of the type mentioned in the introduction in such a way that the lid can be detached from the container without being damaged and without fear of a difficult feasible opening contamination due to food debris dripping or liquids spraying around.

Dette formål opnås i overensstemmelse med opfindelsen ved, at låget består af et i og for sig kendt og i alt væsentligt rektangulært u-brudt foliestykke, hvis fire hjørner til dannelse af oplukningstunger er foldet op på lågets overside langs foldelinjer, der forløber på skrå 15 i forhold til foliestykkets kanter.This object is achieved in accordance with the invention in that the lid consists of a known and substantially rectangular unbroken foil piece, whose four corners for forming opening tongues are folded up on the upper side of the lid along fold lines extending at oblique 15 in relation to the edges of the film.

Som følge af denne udformning lettes åbningen af låget væsentligt, uden at dette ødelægges ved åbningen. Det er nemlig ved åbning tilstrækkeligt at gribe de parvis over for hinanden liggende hjørner og trække i disse diagonalt i forhold til hinanden, så at den under 20 beholderens randflange ombukkede rand af låget løsnes efterhånden ved trækket, indtil låget bliver frigjort fra beholderen og kan løftes af opefter.As a result of this design, the opening of the lid is substantially facilitated without being damaged at the opening. Namely, upon opening, it is sufficient to grip the paired opposite corners and pull them diagonally relative to each other so that the edge of the lid under the flange of the container flanged under the 20 is gradually loosened by the pull until the lid is released from the container and can be lifted. of upwards.

Opfindelsen angår tillige en fremgangsmåde til fremstilling af en sådan beholder ved forbindelse af en skålformet beholderunderdel med et låg 25 af foliemateriale, hvilken fremgangsmåde består i, at man i et i alt væsentligt rektangulært ubrudt foliestykke først folder de fire hjørner op på foliestykkets overside langs foldelinjer, der forløber på skrå i forhold til fofiestykkets kanter, og derved danner oplukningstunger, hvorefter man på i og for sig kendt måde og under dannelse af af-30 rundede hjørner bukker randområdet nedefter til dannelse af en sammenbertlet forbindelse med randflangen 28.The invention also relates to a method of making such a container by connecting a bowl-shaped container base with a lid 25 of foil material, the method of which, in a substantially rectangular unbroken foil piece, first folds the four corners on the top side of the foil piece along fold lines. which extends obliquely with respect to the edges of the foil piece, thereby forming opening tongues, after which, in a manner known per se and forming rounded corners, the edge region is bent downward to form an interconnected connection with the edge flange 28.

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Denne fremgangsmåde har, sammenlignet med den kendte fremstillingsmåde, den fordel, at der ved bearbejdningen af foliestykket hverken kræves en skæreoperation eller dannes affald, eftersom hjørnerne ikke skæres af, men ombukkes og i denne tilstand benyttes 5 som oplukningstunger. Som følge af hjørnernes foldning undgås desuden en uheldig materialesammenklumpning ved ombukning af kanterne i hjørneområdet. En anden fordel består i, at der ikke kræves ekstra gribetunger, som skal falses tilbage på lågets overside, så at det til fremstillingen er tilstrækkeligt med en væsentligt simplere og billigere 10 foldeindretning.This method, in comparison with the known method of manufacture, has the advantage that in the processing of the film piece neither a cutting operation nor waste is required, since the corners are not cut but are folded and in this state 5 are used as opening tongues. In addition, due to the folding of the corners, an unfortunate clump of material is avoided by folding the edges in the corner area. Another advantage is that no extra gripping tongs are required, which must be folded back on the top of the lid, so that a significantly simpler and cheaper folding device is sufficient for manufacture.

Opfindelsen vil i det følgende blive nærmere forklaret under henvisning til tegningen, på hvilken fig. 1 viser et rektangulært foliestykke til fremstilling af et låg til en beholder ifølge opfindelsen set oppefra, 15 fig. 2 et efterfølgende bearbejdningstrin til foldning af de fire hjørner med den neden under antydede beholder, fig. 3A og 3B en beholder med låg ifølge opfindelsen, set fra siden og set oppefra og fig. 4A og 4B tilsvarende beholderen under åbning.The invention will now be explained in more detail with reference to the drawing, in which: FIG. 1 is a plan view of a rectangular foil piece for making a lid for a container according to the invention; FIG. 2 shows a subsequent machining step for folding the four corners with the container below, fig. 3A and 3B are a side view and top view of a container according to the invention, and FIG. 4A and 4B corresponding to the container during opening.

20 Fig. 1 viser et rektangulært foliestykke 10, der ikke på noget sted er forsynet med indsnit, af aluminium, af hvilket der skal fremstilles et låg.FIG. 1 shows a rectangular foil piece 10, which is not cut in any place, of aluminum, from which a lid is to be made.

Ved det i fig. 2 viste arbejdstrin foldes foliestykket 10's fire hjørner 12 langs foldelinjer 14 på foliestykket 10's overside. Foldelinjerne 25 forløber på skrå i forhold til foliestykket 10's kanter 16. På denne måde dannes der oplukningstunger 18 i de fire hjørner 12.In the embodiment shown in FIG. 2, the four corners 12 of the foil 10 are folded along fold lines 14 on the upper side of the foil 10. The fold lines 25 extend obliquely to the edges 16. of the film piece 10, in this way opening tongues 18 are formed in the four corners 12.

I et andet arbejdstrin bukkes et randområde 20 på det i fig. 2 viste låg 22 nedefter under dannelse af afrundede hjørner 24, hvorved låget 22 bliver klar til lukning af en beholder 26.In another working step, an edge region 20 of the embodiment of FIG. 2, the cover 22 shown below forms rounded corners 24, whereby the lid 22 becomes ready to close a container 26.

30 Fig. 3A eller 3B viser fastgørelsen af et sådant låg 22 på en beholder 26 af aluminium, fx en bakke til levnedsmidler. Langs beholderen 26's overside løber der en i hjørnerne ligeledes afrundet randflange 28.FIG. 3A or 3B show the attachment of such a lid 22 to an aluminum container 26, for example a food tray. Along the upper side of the container 26 there is also a rounded flange 28 in the corners.

Låget 22's randområde 20 bertles omkring denne randflange 28.The rim area 20 of the lid 22 bertles around this rim flange 28.

Claims

To open the container 26 and to release the lid 22 relative to the container, it is sufficient to grasp the paired opposite opening tongues 18 and loosen them from the rim flange 28 of the container 26 by pulling the opening tongues 18 diagonally outwards. In this way, the opening tongues are first pulled outwardly in the container plane outwardly and then downwards until the entire edge area 20 of the lid 22, which is folded under the rim flange 28, is eventually loosened. Then the lid 22 can be lifted off easily and without being damaged. During the entire opening process, the container 26 remains in its place 10. As a result of the lid 22 being lifted upwards above the container 26, food debris which adheres to the lid 22 only falls back into the container 26 and thereby does not contaminate the dining area. As mentioned above, in the manufacture of the lid 22, no waste is formed, since the corners 12 of the rectangular foil 10 are folded about 15 on the upper side of the foil piece to form the opening tongues 18. The folded corners 12 also have the advantage that precisely in the corner areas of the container 26 , in which the strongest pleating and thus the largest duct formation as a result of many folds, is more lid material, thereby improving the seal. 20 PATENT REQUIREMENTS

1. A rectangular bowl-shaped container with a cover of foil material, which is connected to the bottom of the container by flushing on all sides with a circular edge flange on the bottom, in particular a food tray, characterized in that the lid (22) consists of a known per se and substantially rectangular unbroken foil piece (10), the four corners (12) of forming opening tongues (18) are folded up on the upper side of the lid along fold lines extending obliquely to the edges of the foil piece (10) .

A method of manufacturing a container according to claim 1 by connecting a bowl-shaped container base with a circumferential rim flange with a cover of foil material,