SE523208C2 - Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging - Google Patents

Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging

Info

Publication number
SE523208C2
SE523208C2 SE0101452A SE0101452A SE523208C2 SE 523208 C2 SE523208 C2 SE 523208C2 SE 0101452 A SE0101452 A SE 0101452A SE 0101452 A SE0101452 A SE 0101452A SE 523208 C2 SE523208 C2 SE 523208C2
Authority
SE
Sweden
Prior art keywords
abutment
membrane
diaphragm
packaging
axes
Prior art date
Application number
SE0101452A
Other languages
Swedish (sv)
Other versions
SE0101452D0 (en
SE0101452L (en
Inventor
Magnus Raabe
Original Assignee
Tetra Laval Holdings & Finance
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 Tetra Laval Holdings & Finance filed Critical Tetra Laval Holdings & Finance
Priority to SE0101452A priority Critical patent/SE523208C2/en
Publication of SE0101452D0 publication Critical patent/SE0101452D0/en
Priority to PCT/SE2002/000746 priority patent/WO2002087975A1/en
Publication of SE0101452L publication Critical patent/SE0101452L/en
Publication of SE523208C2 publication Critical patent/SE523208C2/en

Links

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/184—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying tabs over discharge openings, e.g. over discharge openings defined by tear or score lines
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/50—Caps or cap-like covers with membranes, e.g. arranged to be pierced
    • 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
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
    • B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
    • B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Abstract

A counter pad for use in ultrasound sealing of opening arrangements on packages of the type where access to the contents of the package is attained by rupture of a membrane which is integrated in the opening arrangement. The counter pad has a membrane-supporting surface, preferably formed from a plurality of ridges disposed in mutual spaced apart relationship which is adapted to prevent resonance oscillations in the adjacent membrane.

Description

25 30 35 525 208 Sammanfattning av uppfinningen Under utvecklingsarbetet med att råda bot på proble- met har det framkommit att problemet har anknytning till ultraljudsanvändningen för försegling och närmare bestämt till att ultraljudet ger upphov till resonanssvängningar i materialet i öppningsanordningen. Ett stort antal reso- nansmoder har konstaterats och det synes i stort sett vara omöjligt eller i varje fall opraktiskt och kostnads- krävande att tillverka en öppningsanordning så att ingen av dess resonansfrekvenser sammanfaller med den använda ultraljudsfrekvensen. I Överraskande har det visat sig att lösningen på pro- blemet ligger i utformningen av mothàllet, som enligt uppfinningen förses med en membranstödjande yta. Närmare bestämt har mothàllet och förfarandet enligt uppfinningen kännetecknen i de självständiga patentkraven. Summary of the invention During the development work to remedy the problem, it has emerged that the problem is related to the use of ultrasound for sealing and more particularly to the fact that the ultrasound gives rise to resonant oscillations in the material of the opening device. A large number of resonant modes have been found and it seems virtually impossible or at least impractical and costly to manufacture an aperture device so that none of its resonant frequencies coincides with the ultrasonic frequency used. Surprisingly, it has been found that the solution to the problem lies in the design of the abutment, which according to the invention is provided with a membrane supporting surface. More specifically, the resistance and the method according to the invention have the features of the independent claims.

I en vidareutveckling av uppfinningstanken har den membranstödjande mothållsytan en form som noga följer membranets form över membranets hela utsträckning. Det är emellertid kostnadskrävande att framtaga en sådan nog- grant membrananpassad mothållsyta, varför denna problem- lösning är mindre föredragen för närvarande. Eventuell dålig passning mellan membran och mothåll kan kompenseras med vakuumpàläggning, men inte heller denna problemlös- ning anses för närvarande vara ideal, eftersom vakuum- insats också är kostnadshöjande. Mest effektiv har en sådan membranstödjande mothállsyta enligt uppfinningen visat sig vara som bildas av ringformiga, inbördes kon- centriska àsar anordnade på lämpligt inbördes avstånd från varandra, så att de eliminerar uppkomst av resonans- svängningar i det intilliggande membranet. Det inbördes åsavstàndet är därför helst sådant att det motsvarar en fjärdedels våglängd för membranets svängning då membranet svänger i resonans med ultraljudets frekvens. :gun-o »lura ...an »puss 10 15 20 25 30 35 523 208 3 Mer eller mindre hög membranresonansdämpande effekt har emellertid också àsar med annan utformning och inbör- des placering. Åsarna har lämpligen skarpa eller nàgot avrundade toppar. Detta ger fördelen av att kontaktytan mellan mem- branet och àsarna blir minsta möjliga. När membranet bör- jar svänga och då gär emot dessa skarpa toppar, uppstår plastisk deformation i membranet, vilket leder till att energi frän svängningen absorberas och därmed minskar svängningens amplitud, vilket i sin tur leder till mins- kad påfrestning i försvagningarna.In a further development of the inventive concept, the membrane-supporting abutment surface has a shape which closely follows the shape of the membrane over the entire extent of the membrane. However, it is costly to develop such a carefully membrane-adapted abutment surface, which is why this problem-solving is less preferred at present. Any poor fit between the diaphragm and the abutment can be compensated with vacuum application, but this problem solution is not currently considered ideal either, as vacuum intervention is also cost-increasing. Most effectively, such a diaphragm-supporting abutment surface according to the invention has been found to be formed by annular, mutually concentric axes arranged at a suitable mutual distance from each other, so that they eliminate the occurrence of resonant oscillations in the adjacent diaphragm. The mutual ridge distance is therefore preferably such that it corresponds to a quarter wavelength for the oscillation of the diaphragm as the diaphragm oscillates in resonance with the frequency of the ultrasound. : gun-o »lura ... an» puss 10 15 20 25 30 35 523 208 3 However, more or less high membrane resonance damping effect also has axes with a different design and mutual placement. The ridges suitably have sharp or slightly rounded peaks. This gives the advantage that the contact area between the membrane and the axes is as small as possible. When the diaphragm begins to oscillate and then moves against these sharp peaks, plastic deformation occurs in the diaphragm, which leads to energy from the oscillation being absorbed and thus reduces the amplitude of the oscillation, which in turn leads to reduced stress in the weakenings.

Kort beskrivning av ritningarna Uppfinningen kommer i fortsättningen att beskrivas ytterligare med ett utföringsexempel under hänvisning till bifogade ritning.Brief Description of the Drawings The invention will be further described in the following with an exemplary embodiment with reference to the accompanying drawing.

Fig 1 visar ett snitt genom ett mothàll enligt fig 2 och en öppningsanordning i form av en hällpip enligt fig 3.Fig. 1 shows a section through an abutment according to Fig. 2 and an opening device in the form of a pouring spout according to Fig. 3.

Fig 2 är en perspektivvy av ett mothàll enligt upp- finningen.Fig. 2 is a perspective view of an abutment according to the invention.

Fig 3 är ett tvärsnitt genom hällpipen i fig 1.Fig. 3 is a cross-section through the pouring spout of Fig. 1.

Beskrivning av föredragna utföringsformer I fig l visas en hällpip 4 placerad på mothàllet l.Description of preferred embodiments Fig. 1 shows a pouring spout 4 placed on the abutment 1.

Hällpipen 4 har ett membran 5 som är i kontakt med mot- hàllets àsförsedda yta 2. Membranet 5 är fäst i en ram 6 i hällpipen, integrerad i hällpipen. I kanten mellan mem- branet 5 och ramen 6 finns en gängse försvagning 7.The pouring spout 4 has a diaphragm 5 which is in contact with the abutmented surface 2. The diaphragm 5 is fixed in a frame 6 in the pouring spout, integrated in the pouring spout. At the edge between the membrane 5 and the frame 6 there is a common weakening 7.

Mothállet 1 som visas i fig 1 och 2 har en väsent- ligen plan yta 2, pà vilken det finns ett flertal ring- formiga och koncentriska àsar 3. Avståndet mellan àsarna 3 är ca 1.4 mm, vilket motsvarar en fjärdedels våglängd för membranets svängning dä membranet svänger i resonans med ultraljudsfrekvensen 20 kHz, som kan användas för en förseglingsoperation. Åsarna 3 har företrädesvis skarpa eller nàgot avrundade toppar (radie t ex 0,1 mm).The abutment 1 shown in Figs. 1 and 2 has a substantially flat surface 2, on which there are a plurality of annular and concentric axes 3. The distance between the axes 3 is about 1.4 mm, which corresponds to a quarter wavelength for the oscillation of the diaphragm when the diaphragm oscillates in resonance with the ultrasonic frequency 20 kHz, which can be used for a sealing operation. The ridges 3 preferably have sharp or slightly rounded peaks (radius eg 0.1 mm).

Dà hällpipen 4 ultraljudförseglas dämpas eller elimineras membranets 5 benägenhetatt resonanssvänga, .»1.» ..,-» 10 15 523 208 4 varigenom försvagningen 7 inte utsätts för brottpåfrest- ning.When the pouring spout 4 is ultrasonically sealed, the tendency of the membrane 5 to resonate is attenuated or eliminated. .., - »10 15 523 208 4 whereby the weakening 7 is not subjected to criminal strain.

Hänvisningssiffran 8 syftar på en rivflik för öpp- ning av en förpackning med öppningsanordningen enligt ovan vid försvagningen 7.Reference numeral 8 denotes a tear tab for opening a package with the opening device as above at the weakening 7.

Försök har utförts för att påvisa hur uppfinningen påverkar försvagningsbrottfrekvensen i membranförsedda öppningsanordningar under en förseglingsprocedur. I ett försök där ett mothàll enligt känd teknik användes be- fanns att det hade uppstått brott på fyra förpackningar av 300 testade, medan med samma förpackningsmaskin för- sedd med det uppfinningsenliga mothàllet inte uppträdde något brott alls på 289 testade förpackningar. Vid ett annat försök tillverkades med användning av ett mothàll enligt uppfinningen 3260 förpackningar utan att brott uppstod på någon av dem.Experiments have been performed to demonstrate how the invention affects the attenuation fracture frequency in diaphragm apertures during a sealing procedure. In an experiment where an abutment according to the prior art was used, it was found that there had been a break in four packages of 300 tested, while with the same packaging machine equipped with the invention according to the invention, no break occurred at all on 289 tested packages. In another experiment, using a counter according to the invention, 3260 packages were manufactured without breaking any of them.

I utföringsexemplet ovan är membranet integrerat i öppningsanordningen, men det kan istället vara integrerat i förpackningens material intill öppningsanordningen,In the embodiment above, the membrane is integrated in the opening device, but it can instead be integrated in the material of the package next to the opening device.

Claims (10)

10 15 20 25 30 35 u ,, n-a PATENTKRAV10 15 20 25 30 35 u ,, n-a PATENTKRAV 1. Mothåll för användning vid ultraljudsförsegling av sådana öppningsanordningar till förpackningar där åt- komst till förpackningsinnehàllet erhålles genom brytning av ett membran (5) som finns i anslutning till öppnings- anordningen, vilket mothåll (1) har en yta (2) för upp- stödjande av membranet (5) väsentligen över hela ut- (5), (2) bildas av ett flertal ringformiga sträckningen av membranet k ä n n e t e c k n a t därav, att ytan ásar (3).An abutment for use in ultrasonic sealing of such opening devices for packages where access to the package contents is obtained by breaking a membrane (5) located adjacent to the opening device, which abutment (1) has a surface (2) for opening supporting the diaphragm (5) substantially over the entire outlet (5), (2) is formed by a plurality of annular stretches of the diaphragm characterized in that the surface axes (3). 2. Mothåll enligt krav l, varvid ytan (2) har en form som nära följer formen av membranet (5).An abutment according to claim 1, wherein the surface (2) has a shape which closely follows the shape of the membrane (5). 3. Mothåll enligt något av kraven 1 och 2 , varvid åsarna (3) är koncentriskt anordnade.An abutment according to any one of claims 1 and 2, wherein the ridges (3) are concentrically arranged. 4. Mothåll enligt något av kraven l-3, varvid åsar- nas (3) tippar är något avrundade.An abutment according to any one of claims 1-3, wherein the tips of the ridges (3) are slightly rounded. 5. Mothàll enligt något av kraven 3 och 4, varvid det inbördes avståndet mellan åsarna (3) motsvarar en fjärdedels våglängd för membranets (5) svängning då detta svänger i resonans med ultraljudets frekvens.A brace according to any one of claims 3 and 4, wherein the mutual distance between the ridges (3) corresponds to a quarter wavelength of the oscillation of the diaphragm (5) as it oscillates in resonance with the frequency of the ultrasound. 6. Mothåll enligt krav 5, varvid nämnda avstånd är ungefär 1,4 mm.The abutment of claim 5, wherein said distance is about 1.4 mm. 7. Förfarande vid försegling av öppningsanordningar till förpackningar av den typ där åtkomst till förpackningsinnehållet erhålles genom brytning av ett membran som finns i anslutning till öppningsanordningen, omfattande stegen att - försegla öppningsanordningen medelst ultraljud, och - ge membranet ett stöd över väsentligen hela dess utsträckning medelst ringformiga àsar på ett mothåll, varigenom resonanssvängningar i membranet dämpas eller elimineras.A method of sealing opening devices to packages of the type where access to the package contents is obtained by breaking a membrane adjacent to the opening device, comprising the steps of - sealing the opening device by ultrasound, and - providing the membrane with support over substantially its entire extent by annular axes on an abutment, whereby resonant oscillations in the diaphragm are damped or eliminated. 8. Förfarande enligt krav 7, varvid membranet ges stöd medelst ringformiga och koncentriska ásar på 10 . . c . un 525 208 p . . ~ ~ - n . . n ua 6 mothàllet, vilka àsars avstànd motsvarar en fjärdedels våglängd för membranets svängning då detta svänger i resonans med den ultraljudsfrekvens som används för för- seglingen.The method of claim 7, wherein the membrane is supported by annular and concentric axes of 10. . c. un 525 208 p. . ~ ~ - n. . n ua 6 the abutment, which axes' distance corresponds to a quarter wavelength for the oscillation of the diaphragm as it oscillates in resonance with the ultrasonic frequency used for the seal. 9. Förfarande enligt krav 7 eller 8, varvid ultra- ljudsfrekvensen är ungefär 20 kHz.The method of claim 7 or 8, wherein the ultrasonic frequency is about 20 kHz. 10. Förpackning med en ultraljudsförseglad öppnings- anordning, varvid ultraljudsförseglingen utförts enligt förfarandet enligt nàgot av kraven 7-9 och/eller under användning av mothàllet enligt nàgot av kraven 1-6.Packaging with an ultrasonically sealed opening device, wherein the ultrasonic sealing is performed according to the method according to any one of claims 7-9 and / or using the abutment according to any one of claims 1-6.
SE0101452A 2001-04-26 2001-04-26 Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging SE523208C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0101452A SE523208C2 (en) 2001-04-26 2001-04-26 Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging
PCT/SE2002/000746 WO2002087975A1 (en) 2001-04-26 2002-04-16 A counter pad and a method in the ultrasound sealing of opening arrangements on packages, as well as a package.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0101452A SE523208C2 (en) 2001-04-26 2001-04-26 Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging

Publications (3)

Publication Number Publication Date
SE0101452D0 SE0101452D0 (en) 2001-04-26
SE0101452L SE0101452L (en) 2002-10-27
SE523208C2 true SE523208C2 (en) 2004-04-06

Family

ID=20283877

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0101452A SE523208C2 (en) 2001-04-26 2001-04-26 Opposition and procedure in ultrasonic sealing of opening devices for packaging, as well as packaging

Country Status (2)

Country Link
SE (1) SE523208C2 (en)
WO (1) WO2002087975A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7694768B2 (en) 2006-02-24 2010-04-13 Polaris Industries, Inc. Snowmobile drive assembly
US7891454B2 (en) 2006-02-24 2011-02-22 Polaris Industries Inc. Snowmobile frame assembly
US8820458B2 (en) 2006-02-24 2014-09-02 Polaris Industries Inc. Snowmobile rear suspension

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH553695A (en) * 1972-05-18 1974-09-13 Lovida Ag FILLED CONTAINER WITH LID.
US4534818A (en) * 1983-12-22 1985-08-13 Frito-Lay, Inc. Method and apparatus for ultrasonic sealing
GB8606640D0 (en) * 1986-03-18 1986-04-23 Mead Corp Ultrasonic heat sealing
DE3787023T2 (en) * 1987-11-30 1993-11-25 Mikasa Sangyo Kk Closure and opening device for a container mouth and method for its manufacture.

Also Published As

Publication number Publication date
WO2002087975A1 (en) 2002-11-07
SE0101452D0 (en) 2001-04-26
SE0101452L (en) 2002-10-27

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