NO147744B - THERMOPLASTIC BAG WITH SIDE FOLDER. - Google Patents

THERMOPLASTIC BAG WITH SIDE FOLDER. Download PDF

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Publication number
NO147744B
NO147744B NO774398A NO774398A NO147744B NO 147744 B NO147744 B NO 147744B NO 774398 A NO774398 A NO 774398A NO 774398 A NO774398 A NO 774398A NO 147744 B NO147744 B NO 147744B
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NO
Norway
Prior art keywords
seam
hose section
welding
bags
bag
Prior art date
Application number
NO774398A
Other languages
Norwegian (no)
Other versions
NO774398L (en
NO147744C (en
Inventor
Horst Schmidt
Original Assignee
Windmoeller & Hoelscher
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Publication date
Application filed by Windmoeller & Hoelscher filed Critical Windmoeller & Hoelscher
Publication of NO774398L publication Critical patent/NO774398L/en
Publication of NO147744B publication Critical patent/NO147744B/en
Publication of NO147744C publication Critical patent/NO147744C/en

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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • 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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • 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
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic 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
    • 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
    • B29C65/5007—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 characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5028—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 characterised by the structure of said adhesive tape, threads or the like being textile in woven or non-woven form
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/721—Fibre-reinforced materials
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Sheet Holders (AREA)

Description

Oppfinnelsen vedrører en sekk av termoplasetiateriale, med sidefolder og med sveiset bunnsøm. The invention relates to a sack made of thermoplastic material, with side folds and with a welded bottom seam.

Slike sekker, med sveisede, sammenklebede eller sammensydde bunner, som kan ha kileform eller rettvinklet form, Such bags, with welded, glued or sewn bottoms, which may be wedge-shaped or rectangular in shape,

er kjent i forskjellige utførelsesformer. De kjente sekker med sidefolder har imidlertid den ulempe at bunnsømmene underkastes sterk påkjenning ved fylling av sekkene, slik at de ikke egner seg som store sekker eller sterkt påkjente sekker. are known in various embodiments. However, the known bags with side pleats have the disadvantage that the bottom seams are subjected to strong stress when filling the bags, so that they are not suitable as large bags or heavily stressed bags.

Sekker med sidefolder, hvor bunnen er sWiensydd Bags with side pleats, where the bottom is Swiss stitched

under utnyttelse av forsterkende bånd som kanter de veggdeler som skal forbindes med hverandre, er eksempelvis kjent ifra det canadiske patentskrift nr.542 114 og fra US-patentskriftene nr.2 493 349 og 2 740 577. Når disse kjente sekker fylles, danner det.seg kileformede bunner hvorfra sidefoldene som bestemmer sekkens høyde og i bunnområdet danner trekantformede deler, er trukket ut. Ved de kjente med bånd forsynte sekker vil pga. kilevirkningen, som skyldes at innholdet forsøker å spre de sammensydde veggdeler fra hverandre i bunnområdet, sømtrådene i bunnsømmen rivepåkjennes. I tillegg belaster innholdet de trekantformede, fra bunnen uttrukkede deler av sidefoldene i sterk grad, slik at det bygges opp spenningstopper i de av bunnsømmen dannede kiler, og disses spenningstopper gir ikke bare en påkjenning av sekkmaterialet, men bevirker særlig også en skjærpåkjenning av den allerede sterkt belastede bunnsøm. using reinforcing tapes that edge the wall parts to be connected to each other, is known for example from Canadian patent document no. 542 114 and from US patent documents no. 2 493 349 and 2 740 577. When these known bags are filled, it forms. wedge-shaped bottoms from which the side folds that determine the bag's height and form triangular parts in the bottom area are pulled out. In the case of the well-known bags fitted with straps, due to the wedging effect, which is due to the content trying to spread the sewn together wall parts apart in the bottom area, the seam threads in the bottom seam are subjected to tearing stress. In addition, the contents put a heavy load on the triangular parts of the side folds that are pulled out from the bottom, so that stress peaks build up in the wedges formed by the bottom seam, and these stress peaks not only stress the bag material, but in particular also cause a shear stress on the already heavily loaded bottom seams.

Er sekken fremstilt av varmforseglbart eller sveisbart materiale, så påvirkes bunnsømmen av en rivekraft, noe som er den ugunstigste belastningsform for sveisesømmer. If the bag is made of heat-sealable or weldable material, the bottom seam is affected by a tearing force, which is the most unfavorable form of stress for weld seams.

Sekker med sidefolder kan imidlertid fremstilles på en enkel måte, fordi man bare behøver å forsyne et med sidefolder sammenlagt slangeavsnitt med bunnsømmer. Belastningsevnen er imidlertid ikke god, nettopp fordi den svake bunnsøm er det sted som underkastes den største påkjenning. Bags with side pleats can, however, be produced in a simple way, because you only need to supply a hose section joined with side pleats with bottom seams. However, the load-bearing capacity is not good, precisely because the weak bottom seam is the place subjected to the greatest stress.

Slangeavsnitt av vevnader eller stoffer av strukkede plastbånd, som på en eller begge sider er belagt med plast folie, kan ikke ved hjelp av en enkel bunnsveisesøm forsynes med en bunn som har en fasthet svarende til det høyfaste materialet i sekken. Ved sammensveisingen av bunnen, f.eks. ved hjelp av en strålesveising, vil man riktignok få en fullstendig gjennomsveising av de lag som danner bunnen og vil således oppnå god tetning i dette området, men sammensveisingen vil samtidig oppheve strekkingen i de forsterkende båndstoffer eller -vevnader i sømområdet, slik at man får en utillatelig svekkelse nettopp på det sted i sekken hvor man har store påkjenninger som følge av de opptredende kile- Hose sections of woven seams or fabrics of stretched plastic bands, which are coated on one or both sides with plastic foil, cannot be provided with a bottom that has a firmness equivalent to the high-strength material in the bag by means of a simple bottom welding seam. When welding the bottom, e.g. with the help of beam welding, you will of course get a complete through-welding of the layers that form the bottom and will thus achieve a good seal in this area, but the welding will at the same time cancel out the stretching in the reinforcing tape fabrics or fabrics in the seam area, so that you get a impermissible weakening precisely at the place in the bag where there is great stress as a result of the occurring wedge-

og kjervvirkninger. Videre har de forsterkende bånd en sterk krympe-evne slik at det foreligger en fare for at de trekker seg ut av sveisesømmen under påvirkning av sveisevarmen. Eksempelvis får strukkede polyolefiner i det minste en tidobbel fasthetsstigning. Det har hittil, imidlertid, ikke hatt noen hensikt å benytte eksempelvis ved hjelp av strukkede polyolefin-bånd forsterkede folier som sekkmateriale for sekker med sidefolder, fordi nemlig fastheten i sekkmaterialet oppheves igjen ved anordningen av en bunnsveisesøm nettopp i det kritiske og høyt påkjente bunnområdet. and cardiovascular effects. Furthermore, the reinforcing bands have a strong shrinking ability so that there is a danger of them pulling out of the welding seam under the influence of the welding heat. For example, stretched polyolefins get at least a tenfold increase in strength. Up until now, however, there has been no purpose in using, for example, reinforced foils with the help of stretched polyolefin bands as sack material for sacks with side pleats, because the firmness of the sack material is canceled again by the arrangement of a bottom welding seam precisely in the critical and highly stressed bottom area.

Hensikten med foreliggende oppfinnelse er derfor The purpose of the present invention is therefore

å tilveiebringe en bunnutforming for sekker med sidefolder, slik to provide a bottom design for bags with side pleats, such

at man oppnår en fasthet som svarere til fastheten i det anvendte sekkmaterialet. that you achieve a firmness that corresponds to the firmness of the sack material used.

Dette oppnås ifølge oppfinnelsen ved at et med sidefolder forsynt, flattliggende slangeavsnitt av plastfolie, This is achieved according to the invention by a flat hose section of plastic foil provided with side folds,

som er forsterket ved hjelp av med plastfolien forbundet vevnad eller stoff av strukkede plastbånd, forsynes med en bunnsøm som bevirker en tett sammensveising av samtlige lag, at den med sveisesømmen forsynte ende av slangeavsnittet brettes opp mot dette, og ved at det på bunnområdet festes et bunndekkblad hvis bredde svarer til slangeavsnittet og hvis lengde svarer til lengden av den uttrukkede rettvinklede bunn, idet foldekanten ligger midt på bunndekkbladet. Ved den nye sekk vil samtlige lag i den med sidefolder forsynte slange være fullstendig sammenbaket eller sammensmeltet i bunnsømområdet ved hjelp av sveisesømmen, which is reinforced with the help of woven fabric connected to the plastic film or fabric made of stretched plastic bands, is provided with a bottom seam that causes a tight welding of all layers, that the end of the hose section provided with the welding seam is folded up against it, and by attaching a bottom cover sheet whose width corresponds to the hose section and whose length corresponds to the length of the extended right-angled bottom, the folding edge being in the middle of the bottom cover sheet. In the case of the new bag, all layers in the hose provided with side pleats will be completely baked together or fused in the bottom seam area by means of the welding seam,

slik at man er sikret at bunnen er tett. Det ved sammensveisingen svekkede bunnsømområde er brettet mot det flattliggende slangeavsnitt so that it is ensured that the bottom is tight. The bottom seam area weakened by the welding is folded against the flat hose section

og på bunnområdet er det festet et bunnblad som dekker over brettekanten til den sveisede sekkende, med brettekanten liggende på midten av bunnbladet, og bunnbladet vil bevirke at bunnsveisesømmen ikke påkjennes av rivekrefter. and on the bottom area a bottom sheet is attached which covers the folded edge of the welded sacking, with the folded edge lying in the middle of the bottom sheet, and the bottom sheet will ensure that the bottom welding seam is not subjected to tearing forces.

Ved fyllingen av den nye sekk, vil det fortrinnsvis av et stivere materialet utførte bunnblad bevirke en rettvinklet utforming av bunnen. Bunnbladet overlapper det av bunnsveisesømmen tilveiebragte svekkede område, slik at bunnens fasthet i det minste svarer til fastheten i det anvendte sekkmateriale. Da bunndekkbladet former bunnen til en rettvinklet bunn, vil heller ikke kileområdene til de fra bunnen uttrukkede sidefolder utgjøre noen høyt påkjente områder. Det skyldes at de i det vesentlig flattliggende trekantede sidefOldedeler av bunnområdet fører til en gunatigere spenningsfor-deling, med unngåelse av spenningstopper i kileområdet. When filling the new sack, the bottom blade, preferably made of a stiffer material, will cause a right-angled design of the bottom. The bottom blade overlaps the weakened area provided by the bottom welding seam, so that the firmness of the bottom corresponds at least to the firmness of the bag material used. As the bottom cover blade shapes the bottom into a right-angled bottom, the wedge areas of the side folds pulled out from the bottom will also not form any highly stressed areas. This is because the essentially flat triangular side fold parts of the bottom area lead to a more uniform stress distribution, avoiding stress peaks in the wedge area.

Bunnsveisesømmen kan utføres ved hjelp av strålingssveising som gir en fullstendig sammenbaking ell^r sammensmelting av materiallagene i bunnområdet. Bunndekkbladet kan forbindes med bunnområdet ved hjelp av et klebemiddel, fortrinnsvis et varmsmelt-bart klebemiddel, eller man kan også benytte andre egnede metoder, hvormed man er sikret at relaksasjonstemperaturen til de strukkede bånd ikke nås igjen. The bottom weld seam can be made using radiation welding, which provides a complete bonding or fusing of the material layers in the bottom area. The bottom cover sheet can be connected to the bottom area using an adhesive, preferably a hot-melt adhesive, or other suitable methods can also be used, with which it is ensured that the relaxation temperature of the stretched bands is not reached again.

Med den nye bunn kan man fremstille containersekker som man hittil ikke har kunnet fremstille som sekker med sidefolder. With the new bottom, it is possible to produce container bags that have not been possible to produce as bags with side folds.

Fra US-patentskrift nr. 3 807 626 er det kjent en sekk med sidefolder hvor bunnsømmen brettes om og tildekkes av en forlengelse av en sidevegg. Den ombrettede og til den motliggende sidevegg av sekken klebede veggstrimmel danner imidlertid intet bunndekkblad, men har bare til hensikt å beskytte slangefolien som kan frilegges ved oppriving av den over-lappende veggstrime ved hjelp av en rivetråd. From US patent no. 3 807 626, a bag with side folds is known where the bottom seam is folded over and covered by an extension of a side wall. The wall strip folded over and glued to the opposite side wall of the bag does not, however, form a bottom cover sheet, but is only intended to protect the hose foil which can be exposed by tearing up the overlapping wall strip with the help of a tear wire.

Oppfinnelsen skal beskrives nærmere under henvisning til tegningen hvor The invention shall be described in more detail with reference to the drawing where

fig. 1 viser et sideriss av en med et bunnblad forsynt sekk med sidefolder og fig. 1 shows a side view of a sack provided with a bottom leaf with side folds and

fig. 2 viser sekken i fig. 1 i perspektivriss, i utspilt tilstand, dvs. slik den ser ut når den er fylt. fig. 2 shows the bag in fig. 1 in perspective view, in the unfolded state, i.e. as it appears when filled.

Det med sidefolder sammenlagte slangeavsnitt 1, The hose section 1 joined with side folds,

som består av en med et stoff, en vevnad eller på annen måte forsterket folie, er ved sin nedre ende sammensveiset ved hjelp consisting of a fabric, woven or otherwise reinforced foil, is welded together at its lower end by means of

av en sveisesøm 2 som går gjennom samtlige lag. Sveisesømmen 2 of a welding seam 2 that goes through all layers. The welding seam 2

kan utføres ved hjelp av en strålingssveising eller ved hjelp av sveisemetoder som fører til en fullstendig sammenbaking eller sammensmelting av lagene. Den med sveisesømmen 2 forsynte ende av slangeavsnittet 1 brettes opp mot slangeavsnittet og tildekkes med et bunndekkblad 3 på en slik måte at brettekanten 5 ble liggende midt på bunndekkbladet. Bunndekkbladet klebes til slangeavsnittet ved hjelp av et varmsmeltende bindemiddel 4. Omleggingen av den med sveisesømmen 2 forsynte ende av slangeavsnittet, dvs. brettingen om brettekanten 5, kan skje samtidig med påføringen av bunndekkbladet 3. Det påklebede bunndekkblad 3 forsterker ikke bare bunnen, derved at bunndekkbladet danner et ekastra lag, men forhindrer også at det virker krefter på bunnsveisesømmen 2 som tenderer til å rive opp sømmen. can be carried out by means of a radiation weld or by means of welding methods which lead to a complete baking or fusion of the layers. The end of the hose section 1 provided with the welding seam 2 is folded up against the hose section and covered with a bottom cover sheet 3 in such a way that the folded edge 5 lay in the middle of the bottom cover sheet. The bottom cover sheet is glued to the hose section using a hot-melt adhesive 4. The repositioning of the end of the hose section provided with the welding seam 2, i.e. the folding around the folded edge 5, can take place at the same time as the application of the bottom cover sheet 3. The glued bottom cover sheet 3 not only reinforces the bottom, thereby the bottom cover blade forms an eccentric layer, but also prevents forces acting on the bottom welding seam 2 which tend to tear the seam open.

Claims (1)

Sekk av termoplastmateriale, med sidefolder og med sveiset bunnsøm, karakterisert ved at et med sidefolder forsynt, flattliggende slangeavsnitt (1) av plastfolie som er forsterket ved hjelp av med plastfolien forbundet stoff eller vevnad av strukkede plastbånd, eller ved hjelp av andre innlegg, er forsynt med en bunnsøm (2) som gir en tett sammensveising av samtlige lag, idet den med sveisesømmen (2) forsynte ende av slangeavsnittet (1) er brettet opp mot slangeavsnittet og det i bunnområdet er festet et bunndekkblad (3) hvis bredde svarer til slangeavsnittets og hvis lengde svarer til lengden av den uttrukkede rettvinklede bunn, med ombrettingskanten (5) beliggende midt på bunndekkbladet.Sack made of thermoplastic material, with side pleats and with a welded bottom seam, characterized in that a flat hose section (1) of plastic foil provided with side pleats, which is reinforced by means of fabric connected to the plastic foil or woven by stretched plastic bands, or by means of other inserts, is provided with a bottom seam (2) which provides a tight welding of all layers, as the end of the hose section (1) provided with the weld seam (2) is folded up against the hose section and a bottom cover sheet (3) whose width corresponds to of the hose section and whose length corresponds to the length of the extended right-angled bottom, with the embroidering edge (5) situated in the middle of the bottom cover blade.
NO774398A 1977-03-07 1977-12-21 THERMOPLASTIC BAG WITH SIDE FOLDER. NO147744C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772709823 DE2709823A1 (en) 1977-03-07 1977-03-07 SIDE GOLD BAG

Publications (3)

Publication Number Publication Date
NO774398L NO774398L (en) 1978-09-08
NO147744B true NO147744B (en) 1983-02-28
NO147744C NO147744C (en) 1983-06-08

Family

ID=6002968

Family Applications (1)

Application Number Title Priority Date Filing Date
NO774398A NO147744C (en) 1977-03-07 1977-12-21 THERMOPLASTIC BAG WITH SIDE FOLDER.

Country Status (16)

Country Link
JP (1) JPS53109782A (en)
AT (1) AT352613B (en)
AU (1) AU3357478A (en)
BE (1) BE864151A (en)
BR (1) BR7800579A (en)
DE (1) DE2709823A1 (en)
ES (1) ES243467Y (en)
FI (1) FI64546C (en)
FR (1) FR2383084A1 (en)
GB (1) GB1575172A (en)
IT (1) IT1108720B (en)
NL (1) NL7800321A (en)
NO (1) NO147744C (en)
PT (1) PT67749A (en)
SE (1) SE435914B (en)
SU (1) SU728706A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509181A1 (en) * 1985-03-14 1986-09-25 Hans 4000 Düsseldorf Lissner Multi-layer paper sack
DE19827987B4 (en) * 1998-06-24 2004-12-23 Lemo Maschinenbau Gmbh Funnel bags, in particular potted plant funnels made of thermoplastic plastic film, and method and device for producing such a funnel bag
EP2223866A1 (en) * 2009-02-26 2010-09-01 3A Technology & Management AG Stand bag

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA542114A (en) * 1957-06-11 Bonar And Bemis Ltd. Handle structure for bags
US2493349A (en) * 1946-11-30 1950-01-03 St Regis Paper Co Bag with extensile sealed liner and method for making same
CH284097A (en) * 1950-06-12 1952-07-15 Ver Papierwarenfab Ag Side gusset bags with a bottom that forms during filling.
US2740577A (en) * 1953-03-26 1956-04-03 Bemis Bro Bag Co Bag
FR1535316A (en) * 1967-08-30 1968-08-02 Holweg Const Mec Flat bag of paper or similar material with external reinforcement and method of manufacture thereof
US3807626A (en) * 1972-03-20 1974-04-30 St Regis Paper Co Gusseted pinch bottom breakaway pouch bag

Also Published As

Publication number Publication date
NO774398L (en) 1978-09-08
AU3357478A (en) 1979-08-30
IT1108720B (en) 1985-12-09
NO147744C (en) 1983-06-08
DE2709823A1 (en) 1978-09-14
FR2383084B1 (en) 1983-03-18
FR2383084A1 (en) 1978-10-06
BE864151A (en) 1978-06-16
SU728706A3 (en) 1980-04-15
FI780090A (en) 1978-09-08
IT7820701A0 (en) 1978-02-28
SE7802613L (en) 1978-09-08
BR7800579A (en) 1978-09-26
GB1575172A (en) 1980-09-17
ATA886077A (en) 1979-02-15
JPS53109782A (en) 1978-09-25
PT67749A (en) 1978-04-01
ES243467Y (en) 1980-02-16
SE435914B (en) 1984-10-29
ES243467U (en) 1979-09-16
FI64546C (en) 1983-12-12
NL7800321A (en) 1978-09-11
FI64546B (en) 1983-08-31
AT352613B (en) 1979-09-25

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