NO842000L

NO842000L - VENTURE ARRANGEMENT FOR POSITION CONSISTING OF TWO WELDED FILMS

Info

Publication number: NO842000L
Application number: NO842000A
Authority: NO
Inventors: Henrik Mikkelsen
Original assignee: Folkmar Jan
Priority date: 1983-05-20
Filing date: 1984-05-18
Publication date: 1984-11-21
Also published as: AU2809184A; GR81591B; DE8415240U1; EP0129072A2; ZA843610B; JPS59222678A; FI842006A7; PT78609A; PT78609B; ES532618A0; FI842006A0; DE3418597A1; ES8505162A1; DK227683A; EP0129072A3; DK227683D0

Description

Opfindelsen angår et ventilarrangement ved en af to sammensvejste folier bestående pose, der har et indløb, som for-løber fra posens rand til posens indre langs en af to svej-sesømme afgrænset kanal, hvilket arrangement omfatter to ventilklapper, der ved tværgående svejsesømme er fastgjort til hver sin kanalinderside under dannelse af mod posens indre åbne lommer mellem de ydre folier og ventilklapperne. The invention relates to a valve arrangement for a bag consisting of two welded together foils, which has an inlet, which runs from the edge of the bag to the inside of the bag along a channel delimited by two welding seams, which arrangement includes two valve flaps, which are attached by transverse welding seams to each side of the channel while forming the internal open pockets of the bag between the outer foils and the valve flaps.

Ved poser af denne art fremkommer ventilfunktionen, når den gennem indløbet påfyldte væske ved drejning af posen strøm-mer tilbage mod indløbet, idet væsken herved presses ind i de nævnte lommer og trykker ventilklapperne sammen over ind-løbet, således at ventilen fungerer som en kontra- eller en-vejs-ventil. With bags of this type, the valve function occurs when the liquid filled through the inlet flows back towards the inlet when the bag is turned, as the liquid is thereby pressed into the mentioned pockets and presses the valve flaps together over the inlet, so that the valve functions as a counter - or one-way valve.

I praksis har det imidlertid vist sig, at den art ventiler er meget upålidelige. Under væskens påfyldning presses ventilklapperne ud mod folierne og hæfter sammen med disse på grund af statisk elektricitet og/eller den vedhængskiraf t, der opstår mellem de sammenpressede folier, hvis overflader-ne er fugtige. I begge tilfælde vil den fra posens indre strømmende væske ikke trænge ind i de helt eller delvis luk-kede lommer i tilstrækkeligt omfang, og resultatet bliver derfor i bedste fald, at en stor del af væsken spildes, før ventilklapperne eventuelt lukker indløbet, og i værste fald, at ventilklapperne overhovedet ikke lukker indløbet, før al væsken er strømmet ud. In practice, however, it has been shown that these types of valves are very unreliable. During the filling of the liquid, the valve flaps are pressed against the foils and adhere to them due to static electricity and/or the hanging force that occurs between the compressed foils, if the surfaces are moist. In both cases, the liquid flowing from the inside of the bag will not penetrate the fully or partially closed pockets to a sufficient extent, and the result will therefore be, at best, that a large part of the liquid is spilled, before the valve flaps possibly close the inlet, and in worst case, that the valve flaps do not close the inlet at all, before all the liquid has flowed out.

Selv i de tilfælde, hvor ventilklapperne lukker indløbet,Even in those cases where the valve flaps close the inlet,

før der er strømmet væsentlige væskemængder ud gennem ind-løbet, kan der senere opstå problemer ved håndtering af po-serne, idet ventilklapperne vil have tendens til at følge de ydre folier, så snart der ikke længere er væske i lommerne mellem folierne og ventilklapperne. Lukkevirkningen forsvinder herved og vil normalt ikke genindtræde, når væsken strømmer tilbage mod indløbet, idet yderfoliernes inder- before significant quantities of liquid have flowed out through the inlet, problems may later arise when handling the bags, as the valve flaps will tend to follow the outer foils as soon as there is no longer liquid in the pockets between the foils and the valve flaps. The closing effect disappears in this way and will not normally reappear, when the liquid flows back towards the inlet, as the outer foils' inner

side og ventilklappernes overside hænger sammen på grund af den tilbageblevne fugt. side and the upper side of the valve flaps stick together due to the remaining moisture.

Opfindelsen har til formål at anvise en videreudviklingThe purpose of the invention is to indicate further development

af ovennævnte kendte ventilarrangement, således at dette bliver absolut pålideligt i brug, uden at der hertil kræ-ves komplicerende eller fordyrende ventilindsatser eller lignende. of the above-mentioned known valve arrangement, so that this becomes absolutely reliable in use, without requiring complicating or expensive valve inserts or the like.

Dette formål opnås ifølge opfindelsen ved et ventilarrangement af den indledningsvis nævnte art ogkendetegnetved, This purpose is achieved according to the invention by a valve arrangement of the kind mentioned at the outset and characterized by,

at de ydre folier og ventilklapperne.er svejset sammen ved to langsgående svejsesømme fra de nævnte tværgående. svejse-sømme frem mod posens indre under dannelse af et smalt rør-formet indløb inde i kanalen. Ved hjælp af disse eks.tra svejsninger opnås der en yderst pålidelig ventil, idet det ved de langsgående svejsesømme tilvejebragte indre indløb medfører en sammentrækning af de ventilklapper, der ligger på begge sider af det indre indløb, medens de ydre folier vil ligge slapt hen over det indre rørformede indløb under påfyldningen, hvorved den luftmængde, der altid vil være til stede selv i en fladt sammenlagt pose, vil trænge op i de små lommer på siderne af det rørformede indløb og holde disse, udspilede, således at væsken med sikkerhed vil strømme that the outer foils and the valve flaps are welded together by two longitudinal welding seams from the said transverse ones. welding seam towards the inside of the bag, forming a narrow tube-shaped inlet inside the channel. With the help of these extra welds, an extremely reliable valve is obtained, as the inner inlet provided by the longitudinal welding seams results in a contraction of the valve flaps, which are located on both sides of the inner inlet, while the outer foils will lie loosely across the inner tubular inlet during filling, whereby the amount of air, which will always be present even in a flat folded bag, will penetrate into the small pockets on the sides of the tubular inlet and keep them expanded, so that the liquid will flow with certainty

ind i de udspilede lommer under returløbet og derfra videre ind over ventilklapperne omkring det indre indløb under sammentrykning af disse. into the expanded pockets during the return stroke and from there on over the valve flaps around the inner inlet under compression of these.

Ved en i praksis foretrukken udførelsesform er de langsgående svejsesømme afsluttet i en mindre afstand foran ventilklappernes nedre rand. In a practically preferred embodiment, the longitudinal welding seams are finished at a smaller distance in front of the lower edge of the valve flaps.

Herved opnås en veldefineret passage fra de nævnte udspilede lommer omkring det indre indløb til området mellem den del af ventilklapperne, der danner det indre indløb, og de ydre folier. Hereby, a well-defined passage is achieved from the said expanded pockets around the inner inlet to the area between the part of the valve flaps, which form the inner inlet, and the outer foils.

Ifølge opfindelsen kan indløbet have timeglasform, og ventilklapperne kan være fastgjort til de respektive kanalin-dersider ved timeglassets indsnævrede område. According to the invention, the inlet can have an hourglass shape, and the valve flaps can be attached to the respective channel insides at the narrowed area of the hourglass.

Herved opnås for det første en bekvem indfyldningsåbning til anbringelse under en vandhane eller lignende. For det andet opnås der et i forhold til det indre indløb stort tværsnits-areal ved kanalens indmunding i posen, hvilket foretrækkes af hensyn til det heraf følgende store kontaktareal méllem folierne og den nedre del af ventilklapperne. Indløbets stør-relse vil normalt svare til væskestrålén, som er under påfyldning. In this way, firstly, a convenient filling opening for placement under a tap or the like is achieved. Secondly, a large cross-sectional area is obtained in relation to the inner inlet at the mouth of the channel in the bag, which is preferred due to the resulting large contact area between the foils and the lower part of the valve flaps. The size of the inlet will normally correspond to the liquid jet area, which is being filled.

Ved endnu en udførelsesform for et ventilarrangement ifølge opfindelsen er kanaltværsnittet indsnævret under mundingen på det smalle rørformede indløb ved tværgående svejsesømme fra randen af den timeglasformede kanal mod kanalens midterlinie. In yet another embodiment of a valve arrangement according to the invention, the channel cross-section is narrowed below the mouth of the narrow tubular inlet by transverse welding seams from the edge of the hourglass-shaped channel towards the center line of the channel.

Ved denne udførelsesform opnås der et veldefineret svækkel-sespunkt mellem posens indre og den udvidede nedre del af den timeglasformede indstrømningskanal, hvilket er hensigts-mæssigt, dersom posen anvendes til nedfrysning af flydende næringsmidler, da der herved ikke længere er fare for, at de i den nedre del af indstrømningskanalen indefrosne folie-dele forurener det nævnte nydelsesmiddel. Den nedre del af indstrømningskanalen afbrækkes fra selve posens indre omkring det indsnævrede område og bortkastes. With this embodiment, a well-defined point of weakness is achieved between the inside of the bag and the extended lower part of the hourglass-shaped inflow channel, which is appropriate if the bag is used for freezing liquid foodstuffs, as there is no longer a danger that they in the foil parts frozen in the lower part of the inflow channel contaminate the said refreshment. The lower part of the inflow channel is broken off from the inside of the bag itself around the constricted area and discarded.

Det indsnævrede område kan ifølge opfindelsen have i det væsentlige samme bredde som det smalle rørformede indløb. According to the invention, the narrowed area can have essentially the same width as the narrow tubular inlet.

Ved denne udformning har det vist sig, at væsken strømmer gennem det indre indløb og det indsnævrede område netop så langsomt, at indespærret luft i posens indre når at trænge op i lommerne omkring det indre indløb. With this design, it has been shown that the liquid flows through the inner inlet and the narrowed area just so slowly that trapped air in the interior of the bag manages to penetrate into the pockets around the inner inlet.

Ifølge opfindelsen kan ventilklapperne være dannet ved ombukning af de ydre folier. According to the invention, the valve flaps can be formed by bending the outer foils.

Herved opnås en fremstillingsteknisk meget enkel ventil, der kan tilveiebringes ved enkle svejseoperationer mellem to i hovedsagen- rektangulært udskårne folier. This results in a manufacturing-technically very simple valve, which can be provided by simple welding operations between two rectangularly cut foils in the main saw.

Opfindelsen skal i det følgende forklares nærmeres under henvisning til tegningen, på hvilken In the following, the invention will be explained in more detail with reference to the drawing, in which

fig. 1 viser en pose med et ventilarrangement ifølge opfindelsen, fig. 1 shows a bag with a valve arrangement according to the invention,

fig. 2 samme set fra siden,fig. 2 same side view,

fig. 3 et snit efter linien III-III i fig. 1, og fig. 4 et snit efter linien IV-IV i fig. 1. fig. 3 a section along line III-III in fig. 1, and fig. 4 a section along the line IV-IV in fig. 1.

Den i fig. 1 viste pose består af to indbyrdes delvis sam-mensvejsede folielag, hvor svejsesømmene er markeret ved de skråt skraverede områder. Ved posens øvre rand er der tilvejebragt en i hovedsagen timeglasformet indstrømnings-kanal 7, der forneden udmunder i et antal indbyrdes forbund-ne formhulrum. The one in fig. 1, the bag shown consists of two mutually partially welded foil layers, where the welding seams are marked by the diagonally shaded areas. At the upper edge of the bag, a mainly hourglass-shaped inflow channel 7 is provided, where the bottom opens into a number of interconnected mold cavities.

Ventilarrangementet ifølge opfindelsen er tilvejebragt i den timeglasformede indstrømningskanal 7. Kanalen 7 er således afgrænset af langsgående svejsesømme 5, 6, der for-løber fra posens rand til posens indre 4. The valve arrangement according to the invention is provided in the hourglass-shaped inflow channel 7. The channel 7 is thus delimited by longitudinal welding seams 5, 6, which run from the edge of the bag to the interior 4 of the bag.

Som det tydeligt fremgår af fig. 2,er der i den nedre del af indstrømningskanalen 7 tilvejebragt to ventilklapper 8, 9, idet der til de to ydre folier 1, 2. ved området 10 er fastsvejset en ombukket del af folierne. Herved dannes der mod posens indre 4 åbne lommer 11, 12 mellem de ydre folier og ventilklapperne. Indløbet til posens indre 4 er i fig. 2 under ét betegnet ved henvisningstallet 3. As is clearly evident from fig. 2, two valve flaps 8, 9 are provided in the lower part of the inflow channel 7, as a bent part of the foils is welded to the two outer foils 1, 2 at area 10. Thereby, 4 open pockets 11, 12 are formed towards the inside of the bag between the outer foils and the valve flaps. The inlet to the bag's interior 4 is in fig. 2 collectively denoted by the reference number 3.

I fig. 3, der viser et snit efter linien III-III i fig. 1, er posen vist under indfyldning af væske. De i kanalen 7's længderetning forløbende svejsesømme 13 danner et indre ind-løb 15 inde i kanalen 7. Samtidig dannes der mellem svejse-sømmene 13 og svejsesømmene 6 lommer på siden af indløbet. In fig. 3, which shows a section along the line III-III in fig. 1, the bag is shown while filling with liquid. The welding seams 13 running in the longitudinal direction of the channel 7 form an internal inlet 15 inside the channel 7. At the same time, pockets are formed between the welding seams 13 and the welding seams 6 on the side of the inlet.

Som det tydeligt fremgår af fig. 4, der viser et snit efter linien IV-IV i fig. 1,danner ventilklapperne 8 og 9 ved de-res nedre rand en fortsættelse af det rørformede indre ind-løb 15, hvorved ventilklapperne 8 og 9 er trukket sammen på begge sider af det indre indløb 15. De ydre folier 1 og 2 vil derimod ligge løst over indløbet 15, hvorved der dannes åbninger (antydet ved det stiplede område),hvor væsken ved tilbageløbet uhindret kan trænge ind og videre ind over det rørformede indløb 15 under sammentrykning og aflukning af dette. As is clearly evident from fig. 4, which shows a section along the line IV-IV in fig. 1, the valve flaps 8 and 9 at their lower edge form a continuation of the tubular inner inlet 15, whereby the valve flaps 8 and 9 are pulled together on both sides of the inner inlet 15. The outer foils 1 and 2, on the other hand, will lie loosely over the inlet 15, whereby openings are formed (indicated by the dashed area), where the liquid can penetrate unhindered during the return flow and further over the tubular inlet 15 during compression and degassing thereof.

Claims

1. Valve arrangement for a bag consisting of two welded foils (1,2), which has an inlet (3), which runs from the edge of the bag to the inside of the bag (4) along a channel (7) defined by welding seams (5,6). , which arrangement includes two valve flaps (8,9), which are attached by transverse welding seams (10) to each side of the channel, forming the internal open pockets (11,12) of the mod bag between the outer foils (1,2) and the valve flaps ( 8,9), characterized by the fact that the outer foils (1,2) and valve flaps (8,9) are welded together by two longitudinal welding seams (13,14) from the mentioned transverse welding seams (10) towards the inside of the bag (4 ) under dan nelse of a narrow tubular inlet (15) inside the channel.

2. Valve arrangement according to claim 1, characterized in that the longitudinal welding seams (13, 14) are completed at a smaller distance (a) in front of the lower edge of the valve flaps (8,9).

3. Valve arrangement according to claim 1 or 2, characterized in that the inlet (3) has an hourglass shape, and that the valve flaps (8,9) are attached to the respective channel sides at the narrowed area of the hourglass.

4. Valve arrangement according to claim 3, characterized in that the channel cross-section is narrowed below the mouth of the narrow tubular inlet (15) by transverse welding seams (16, 17) from the edge of the hourglass-shaped channel towards the center line of the channel.

5. Valve arrangement according to claim 4, characterized in that the narrowed area has essentially the same width as the narrow tubular inlet (15).

6. Valve arrangement according to one of the preceding claims, characterized in that the valve flaps (8,9) are formed by bending the outer foils (1,2).