SE504159C2 - Method for closing a trough with a lid that has a window opening - Google Patents

Method for closing a trough with a lid that has a window opening

Info

Publication number
SE504159C2
SE504159C2 SE9201034A SE9201034A SE504159C2 SE 504159 C2 SE504159 C2 SE 504159C2 SE 9201034 A SE9201034 A SE 9201034A SE 9201034 A SE9201034 A SE 9201034A SE 504159 C2 SE504159 C2 SE 504159C2
Authority
SE
Sweden
Prior art keywords
lid
trough
plastic film
tray
plastic
Prior art date
Application number
SE9201034A
Other languages
Swedish (sv)
Other versions
SE9201034L (en
SE9201034D0 (en
Inventor
Tony Noren
Original Assignee
Tony Noren
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 Tony Noren filed Critical Tony Noren
Priority to SE9201034A priority Critical patent/SE504159C2/en
Publication of SE9201034D0 publication Critical patent/SE9201034D0/en
Priority to EP93908248A priority patent/EP0632779A1/en
Priority to PCT/SE1993/000277 priority patent/WO1993019986A1/en
Publication of SE9201034L publication Critical patent/SE9201034L/en
Publication of SE504159C2 publication Critical patent/SE504159C2/en

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—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
    • B29C66/13—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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • 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
    • 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
    • B29C66/72327—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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/482—Drying adhesives, e.g. solvent based adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4825—Pressure sensitive adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces 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
    • B29C66/71—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)
  • Packages (AREA)

Abstract

A method for sealing a tray (1) by means of a lid (3), the lid consisting of a paperboard material, and the tray of a plastic material or of a plastic-laminated paperboard and being particularly intended for storing and heating food. The lid (3) is provided with an opening (6) and is adhesively secured to a plastic film (7). The lid is then, together with its plastic film, welded to the tray. The adhesive securing is so dimensioned that the adhesion between the lid and the plastic film will be weaker than the weld seal between the film and the tray, such that the lid - without being heated and without causing any loosening of the plastic film from the tray - can be removed from the plastic film after this has been welded to the tray. The side of the plastic film that faces the tray is coated with a layer of so-called peel-off-type which enables a removal of the film after this has been welded to the tray.

Description

504 159 10 15 20 25 30 35 REDÛGÖRELSE FÖR UPPFINNINGEN Ändamålet med föreliggande uppfinning är därför att anvisa en metod av inledningsvis angett slag, där samtliga ovan- nämnda nackdelar är undanröjda. Detta ändamål ernås genom att metoden enligt uppfinningen erhållit de i patentkrav 1 angivna kännetecknen. 504 159 10 15 20 25 30 35 DISCLOSURE OF THE INVENTION The object of the present invention is therefore to provide a method of initial kind, in which all the above said disadvantages are eliminated. This purpose is achieved through that the method according to the invention has obtained those in claim 1 specified characteristics.

Vidareutvecklingar av uppfinningen framgår av underpatent- kraven.Further developments of the invention are apparent from the the requirements.

FIGURBESKRIVNING Hitningens enda figur är en schematisk perspektivvy av ett värmningsverktyg samt ett tråg, som försluts medelst meto- den enligt föreliggande uppfinning.DESCRIPTION OF FIGURES The only figure of the hit is a schematic perspective view of one heating tool and a trough, which is closed by means of the one according to the present invention.

FÖREDRAGEN UTFÖRINGSFORM På ritningen visas ett tråg 1 av plast, t ex polyesterplast, eller av polyesterlaminerad kartong. Trågets öppningskant är utkragad ca 90 grader till bildning av en runt hela öpp- ningskanten gående sarg 2. Tråget 1 är avsett att vätske- tätt tillslutas mot sargen 2 av ett lock 3 av kartongmate- rial.PREFERRED EMBODIMENT The drawing shows a tray 1 of plastic, eg polyester plastic, or of polyester laminated cardboard. The opening edge of the trough is cantilevered about 90 degrees to form a round entire opening The trough 1 is intended to allow liquid tightly closed against the rim 2 by a lid 3 of cardboard material rial.

Förslutning av tråget 1 utförs med hjälp av ett värmnings- verktyg bestående av ett säte 4, i vilket tråget 1 är avsett att placeras, och ett mot sätet 4 rörligt svetshuvud 5 för att under presstryck fastsvetsa locket 3 mot tråget 1.Sealing of the trough 1 is performed by means of a heating tool consisting of a seat 4, in which the trough 1 is intended to be placed, and a welding head 5 movable towards the seat 4 for to press the lid 3 against the trough 1 under pressure pressure.

Tråget försluts på följande sätt.The trough is closed in the following way.

Locket 3 tillverkas av obehandlad kartong, och förses med en genomgående fönsteröppning 6 för att medge insyn i trå- get 1. En genomskinlig plastfilm 7, lämpligen av polyester- material, t ex ett material marknadsfört under benämningen 10 15 20 25 30 35 504 159 Mylar (registrerat varumärke) ÛL25, används lämpligen såsom fönster i locket 3. Nämnda typ av plastfilm är på ena sidan, trågsidan i detta fall, belagd med ett s k peel-off-skikt, vilket möjliggör att filmen efter fastsvetsning mot en plastyta kan avdragas från denna.The lid 3 is made of untreated cardboard, and is provided with a continuous window opening 6 to allow access to the wire 1. A transparent plastic film 7, preferably of polyester material, such as a material marketed under the name 10 15 20 25 30 35 504 159 Mylar (registered trademark) ÛL25, is suitably used as window in the lid 3. Said type of plastic film is on one side, the trough side in this case, coated with a so-called peel-off layer, which allows the film after welding to a plastic surface can be deducted from this.

Plastfilmen 7 fastlimmas, såsom antyds med den streckade medelst ett kallim, t ex medelst sträng- eller linjen 8, .punktlimning, med sin ej belagda yta mot lockets 3 trågsida.The plastic film 7 is glued, as indicated by the dashed line by means of a cold glue, for example by means of string or line 8, .point gluing, with its uncoated surface against the 3 side of the lid of the lid.

Filmen 7 sträcker sig över i huvudsak hela lockets 3 yta, så att fönstret 6 täcks. så att filmen 7 här sticker ut, Två av lockets 3 hörn är bortskurna, och bildar grepp vid önskad avdragning av filmen efter det att denna vid 7a resp. 7b, har fastsvetsats, såsom beskrivs nedan.The film 7 extends over substantially the entire surface of the lid 3, so that window 6 is covered. so that the film 7 stands out here, Two of the 3 corners of the lid are cut away, and forms grip at the desired peeling of the film after this at 7a resp. 7b, has been welded, as described below.

Kallimmet kan t ex bestå av Gludan-(registrerat varumärke)- lim. Detta lim är dels tillräckligt värmetåligt för att klara de vid den nedan beskrivna, efterföljande svetsningen, dels godkänt för kontakt med livsmedel.The cold glue can, for example, consist of Gludan- (registered trademark) - glue. This glue is partly heat-resistant enough to cope with the subsequent welding described below, partly approved for contact with food.

Det sålunda tillverkade locket 3 med pålimmad plastfilm 7 levereras därefter till en matförpackare. Denne fyller trå- get 1 med önskat innehåll, varefter tråget 1 placeras i sätet 4. Locket 3 placeras därefter med sin plastfilm 7 vettande mot trågets sarg 2. Svetshuvudet 5 bringas sedan att under värme pressa locket 3 mot trågets sarg 2, varvid filmen 7 fastsvetsas mot sargen 2. Tråget 1 med sitt inne- håll är nu klart att distribueras till konsument.The lid 3 thus manufactured with glued plastic film 7 then delivered to a food packer. This fills the thread get 1 with the desired content, after which the trough 1 is placed in the seat 4. The lid 3 is then placed with its plastic film 7 facing the rim of the trough 2. The welding head 5 is then brought to heat the lid 3 against the rim 2 of the trough under heat, whereby the film 7 is welded to the rim 2. The trough 1 with its inner is now ready to be distributed to consumers.

Om konsumenten vill få maximal insyn i tråget, t ex om han vill välja extra noga bland flera olika, inköpta rätter, kan han lätta på locket 3 och försiktigt avdraga detta utan att plastfilmen 7 lossnar från tråget. Dm han i stället väljer att behålla locket 3 på underlättas trågets öppnande efter uppvärmningen i ugn, om han först lättar något på locket 3 och därefter drar i en av hörnflikarna 7a resp. 7b, så att filmen 7 kan dras av från tråget. 504 159 10 15 Fastlimningen av plastfilmen 7 mot locket 3 medelst limmet 8 dimensioneras på sådant sätt, att filmens vidhäftning mot locket 3 blir svagare än den vidhäftning mellan filmen och tråget 1 som erhålls till följd av filmens fastsvets- ning mot tråget.If the consumer wants maximum insight into the trough, for example about him want to choose extra carefully from several different, purchased dishes, can he lightens the lid 3 and carefully pulls this off without the plastic film 7 detaches from the trough. Dm he instead chooses keeping the lid 3 on facilitates the opening of the trough after the heating in the oven, if he first lightens something on the lid 3 and then pulls on one of the corner flaps 7a resp. 7b, so that the film 7 can be pulled off from the trough. 504 159 10 15 The gluing of the plastic film 7 to the lid 3 by means of the glue 8 is dimensioned in such a way that the adhesion of the film against the cover 3 becomes weaker than the adhesion between the film and the trough 1 obtained as a result of the film welding against the trough.

För tillverkning av locket 3 används sådant kartongmaterial att locket ger tråget 1 tillräcklig stadga och styvhet vid all transport och hantering av tråget fram till konsumen- ten.Such cardboard material is used for the manufacture of the lid 3 that the lid gives the trough 1 sufficient stability and rigidity at all transport and handling of the trough up to the consumer ten.

Kartongdelen i locket 3 kan lämpligen förses med önskad text, t ex angående innehållet i tråget eller med bruks- anvisning för innehållets uppvärmning.The cardboard part in the lid 3 can suitably be provided with the desired text, for example regarding the contents of the trough or with the instructions for heating the contents.

Claims (2)

10 15 20 25 30 504 159 P a t e n t k r a v10 15 20 25 30 504 159 P a t e n t k r a v 1. Metod för förslutning av ett tràg medelst ett lock, vil- ket trág består av plastmaterial eller plastlaminerad kar- tong, och är särskilt avsett för förvaring och uppvärmning av mat, och vilket lock består av kartongmaterial, k ä n n e t e c k n a d av att a) locket (3) förses med minst en fönsteröppning (6) för att medge insyn i tråget (1), b) en genomskinlig plastfilm (7), lämpligen av s k peel- off-typ, fastsätts medelst limning medelst ett värmetàligt lim (8) mot lockets trågsida, så att den täcker fönster- öppningen (6), c) tråget (1) d) locket (3) med den pålimmade plastfilmen (7) fylls med önskat innehåll, appli- ceras över tràgets öppningskant (2) med plastfilmen (7) vänd mot tråget (1), varefter plastfilmen fastsvetsas mot tràgets öppningskant (2), och att e) limningen dimensioneras så, att plastfilmens vidhäft- ning mot locket (3) blir svagare än mot tråget (1), vari- genom locket - utan att behöva uppvärmas, och utan att plastfilmen lossnar från tråget - helt eller delvis kan avlägsnas från plastfilmen efter dennas fastsvetsning mot tråget.A method of closing a tray by means of a lid, which tray consists of plastic material or plastic laminated cardboard, and is particularly intended for storing and heating food, and which lid consists of cardboard material, characterized in that a) the lid (3) is provided with at least one window opening (6) to allow transparency in the trough (1), b) a transparent plastic film (7), suitably of the so-called peel-off type, is fixed by gluing by means of a heat-resistant glue (8) against the trough side of the lid, so that it covers the window opening (6), c) the trough (1) d) the lid (3) with the glued plastic film (7) is filled with the desired content, applied over the opening edge of the trough (2) with the plastic film (7) facing the trough (1), after which the plastic film is welded to the opening edge (2) of the trough, and that e) the gluing is dimensioned so that the adhesion of the plastic film to the lid (3) becomes weaker than to the trough (1), whereby the lid - without having to be heated, and without the plastic film coming loose from the trough - completely or partially can be removed from the plastic film after it is welded to the trough. 2. Metod enligt krav 1, k ä n n e t e c k n a d av att plastfilmen (7) förses med från locket (3) utstickande 7b) dragning av plastfilmen från tråget. partier (7a, avsedda att bilda grepp vid nämnda av-Method according to claim 1, characterized in that the plastic film (7) is provided with 7b) pulling the plastic film from the trough protruding from the lid (3). portions (7a, intended to form grips at said
SE9201034A 1992-04-02 1992-04-02 Method for closing a trough with a lid that has a window opening SE504159C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9201034A SE504159C2 (en) 1992-04-02 1992-04-02 Method for closing a trough with a lid that has a window opening
EP93908248A EP0632779A1 (en) 1992-04-02 1993-04-01 A method for sealing a tray by means of a lid
PCT/SE1993/000277 WO1993019986A1 (en) 1992-04-02 1993-04-01 A method for sealing a tray by means of a lid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9201034A SE504159C2 (en) 1992-04-02 1992-04-02 Method for closing a trough with a lid that has a window opening

Publications (3)

Publication Number Publication Date
SE9201034D0 SE9201034D0 (en) 1992-04-02
SE9201034L SE9201034L (en) 1993-10-03
SE504159C2 true SE504159C2 (en) 1996-11-25

Family

ID=20385830

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9201034A SE504159C2 (en) 1992-04-02 1992-04-02 Method for closing a trough with a lid that has a window opening

Country Status (3)

Country Link
EP (1) EP0632779A1 (en)
SE (1) SE504159C2 (en)
WO (1) WO1993019986A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501884C2 (en) * 1993-10-12 1995-06-12 Ellemtel Utvecklings Ab Synchronous circuit arrangements determine the boundary between consecutive packets
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SE9201034L (en) 1993-10-03
EP0632779A1 (en) 1995-01-11
WO1993019986A1 (en) 1993-10-14
SE9201034D0 (en) 1992-04-02

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