HUE029237T2 - Method for the production of film bags - Google Patents

Description

METHOD EOR THE PEDDIJCT1ÖM OF TfBM BAGS SESM31CE; 1¼ preseal invention pertains w a method 1¼ ;8*a»«te»ci«g film tegs that feature a first and a second font skie, two pssets that are placed between the front sides and extend in a loogMinal fechno of the fag and an opening; sa a bag too, wherein the iront sides and the gussets are jorntiy produced of a multilayer film, wherein the gussets end underneath ire: opening at the bag top, and wherein upper ends of the gussets are seated.

The inventive mHhod is partieaiady intended for manufacturing ffafiy tying prelaferaeated film bags that are sofeserpeatly filed wifi bulk material in a hagliing maefine and sealed, wherein at a fag top, Λ tier the idling operation, the film bag is sealed by means of a hot-sealing seam and can subsequently be to. ope® again daring its initiât asp, it is known to provide corresponding fim bap with a reelosnre system, hi order to allow a simple arrangement of seed a reeinsure system, the gussets are offset relative to the trag top snob that the feelosmre system can be inserted between the first and the second front side above the gussets over the entire width of the film bag. in seel: a gassetsd bag with gussets that are offset relative to the bag top, it is necessary- to reliably close the Shortened gpSSists. fit this eantexi, it has to be tabes Into cotwlderatioo that the Elm hags In question are produced of a nmlfilayer film that usually can only be hot-sealed on one of its enter layers. This hot-sealing outer layer Is arranged on the inner side during She production of the film hag and thereby allows the by means of hot-sealing, as well as the attachment of flmctmnal elements: such as, for example, a redősére system. When the corresponding hot-sealing seams are produced, the other oater layer arranged on the outer side of the bag remains unaffected because this outer layer does not melt - at least not at The adjusted hbfiseaing temperatures.

Tfe Hm used feqasntly consists of a multilayer laminated Elm that can subsequently also be provided with internal printing. Especially bags of this type are characterized by sotmd fimetional properties and a high-quality abearance.

Tw« hmdamenfahy dlfTereot approaches may he considered for the marmfheiure of prefabricated film hags with offset gussets, for example, the two front sides and the gassets inserted in between may be supplied in the firm of separate Elms and subsequently connected. The Elm bag or a snip, from which individual film bap can be separated, is practically assembled of several ills eiemehts or flint strip. In such a method, a high degree of flexibility is achieved because it provides very extensive combination possibilities, wherein the individual elements can already fee modified or adapted prior to then assembly.

Corresponding methods are known from EE I 524 195 B1 and BP 2 383 109 AL

The present hweniisn. hr contrast, pertains to athÄsd, só which the fiira bap with the two firmt tides and the two pssëtt essentially are jointly produced of a multilayer film by means: of folding. This provides the advantage that if is not necessary' to assemble and connect several elements to One dnotber. On the ether hasdt the design options of the; hag are somewhat limited because the bags are always produced! of a cmqJiUKMS cmnçsâteà mMm or a cmvtittuoos connected »trip. Correspondmg methods lof msôafâetdf^: gnsseted fife feags are known fe® EF i m S96BI,US 20Ö2/Ö10306? AJ: and WO 2Ö8k/42öp2 A2> I« order to Apfels» a. tight mâ of fie gtmets shortened by means of a punching during Été ssptrse of suek & ΜΦΦ Eie öd# of the göpets. fented fey Öse pnneSpogs are: either sealed io Öse regiert of fe b»$pp by mmi of respectively assigned film slips, afilm strip cxiendipg: in fits lateral direetkm or a reeiospre system.

This procedure proved to fee elïeetive m practical upplieatioss, feat fits strip or th« precise pMiiiofetg of tfe «closure system such ÉPI it «spectively overlaps the upper g®i of the gussets is púdé elaborate, The film slfe flint strip of assigned part of its reelosufe systsat parfeulMy has 1 & bridge a Step on tbe upper end of tbs shortened gussefr: such that a reliable seal cau only fee: achieved at this location lithe sealing operation is carried oat with great care.

According to WÜ 2006/092517 Ai, gussets are supplied separately»Cthe toot sides or separated from the fro« sides by means of incisions, literein the upper end of dte «assets is then tented perpendieaiarly outward. This provides the advantage dpt the gusset» are during the production of a continuous longitudinal hot-sealing seam reliably sealed simply by feeing turned outward. However, the described measures are not suitable fra the production of film bags of a strip, This applies analogously to EF i 748 47s M and EE 1 | J>5 332 B l , In whiclr m oppsr edge of the shortened gussets Is turned over fey a. shod, distance and the edge tunned fey die punch lug then exteads ohlngtely outward at an angle, is lï^hï of those circumstances, the present invention is based ott the oifieefive of disclosing a method for nutnuhteturiag film bags which makes it possible tp easily produce ilp bags by means of foldiog and in; which gussets shortened due to a punching are reliably sealed,

According to the invention:, this objective is attained with a method· according; to claim ;)..

Eased m a method lor toaauiaetariug film feags fefoldlog a film strip, the mvealfei proposes that the gussets are obliquely földed over onto themselves on their ends fonnod by trie purtehiags such that the ends formed by tse ptmcfeisgs are after the folding operation aligned along tbe longhudimd direction, where its the thasly folded ends are then sealed. The ends eah already fee fixed directly altar tie folding operation such that they maintain then position during the further handlft!#Éb Üjjph fldwever, a tiglninctfrptfrätiou lut o ao edge of the strip or the bags to he produced: thereof preferably döeSAöt iahe place: utdil fongitudiual liol-seaiug seatus are produced,. On th«: strip, the puodhlogs represe nt : mterropdons of the gussets, whereas at least the end of the gussets tirai lies asdemeath: the bag top m a finished: film bag is folded over in: the above--d«ser!bed htshipo.

Aecordieg: tö the invenriou, a tight seal: of the gussets can fee: very easily aelfeved without rcqsdriug «sy luthar iodsioos, Shaping operations or the Mice, This results do :a particularly simple procedure that also: allows: :» very high ihtooghput, i:.e, a high speed of the film strip or film section.

The: film section Is either continuously or mtermideittiy transported In a Iced direction that usually corresponds to the kmgitudin&i: direction: of lire subsequently produced hags. Viewed & She löitgltudiusf direction,, the puhchlpp il« podbsed at the same height at a .lateral distance front one «toiler* namely precisely: at the locatides, at: which the pssets are sobsequemly loaned:-

The first Ifoof side ;®ay basically befortpcd: oh fiit® section about efemraily, 1¾ ésdi ásesfefeiklly symmetric design, She edges: of'ïte film section mggf őr the sorfkec o# tbc second front: side aad fimei® te connected at Ms location íf»»s of a separate. fosgpteÄpi hot-saahng seam,

According: fo a ppífoned altematiye spfoífoimém: bf foe toveatfoa, a gusset, the list front sidfo the second gosset and ultimately île second dont side are fősíned between one edge of she film section nod: she other edge of the dim section- llllá provides foe: advantage that: the loogitudfoai hot-seaifog seas® foe eifoamfemefisily: sealing the sffsp extehdS: dong a bag edge such that both fent sides can he made available without fotemifokm and a padledtely appeahng appearance is achievefo 'foe: width of the panchings Ist the lateral direction h preferably smaller than: twice the width, «fite V-shaped: gussets iösetíedi feetweest the front sides, if me punching* cxtettd ever the entire gussets»: the edge of ite pooehlog is; focated exagfïÿ Ist a folding edge T'hn ns tv under -mcM® ckmMmvm increase the risk: of Passaging the tils section or the strip produced thereof with knife: folders during She folding tfoerafloo. However, if the width of the: punching«: Is sotalfet than twice the width of the ¥*S:hspsb gussets: inserted tefweea. the front walls and if foe punching is arranged oenteifedT’efsmid to the gusset, hi least a narrow section of Use film always sustains on the folding edges and. if so: mqafred, täte he subsequently removed by tfemmmg the longitudinal edges, This: trimmi ng is also referred to as: edging,. The overall optical appesraoc«- of the: falói hag can alsohe fmprovedj lnlpanicuiar, by trimming die iongifodinal edges. 1® order to easily fold over the ends of the gussets arranged mufenteath the bag fop, the strap east he fr&nsported past ® folding: device that lids and: folds over the end Of the gnysot on an ixtner folding edge. If the strip is continuously or incrementaiiy transported in the feed direction, such a folding operation can also he realized with sltspls stationary foils folders or the like depending on the design of the folding device provided fer this purpose, fa this case, the ends of the gussets ate directly folded over due to the feed of the strip.

The folding operation is preferably carried out in such a way that the folded ends are placed onto the assigned gusset from above. Affér the production of the second front side, foe folded ends therefore are arranged between the respective gusset and the second front side.

If psodhnjgs, which are rectangularly delimited in the lateral difrsafost and in the longitudinal or feed direction, are produced to the film section in accordance with a preferred embodiment of the in vention, the ends are advanfage-cntsly folded over at: an angle of 4SS aael* that tiw ends; a!®: exactly: aligned: along the loughudhrs! directton after the folding operaion.

However, it would::basically also be o#terk3Íiife».:^f «dtäfofrfpyfőrpféíitep à rhomboidal guoOhfog rather than m exactly rectangular punching. In this esse, an angle other titan 45 s is repaired for aligning the thasly produced free ends of the gussets: along the lougltudinaidifecfidn.

The longitudinal hofrsealing seam for elremnforentlally sealing the strip must he produced continuously in oofer to seal tire bag. Other loogifodinal hot-scaling seamy dd not neecssarily lmve fo be prodnceil ft: basically suites If the folded ends of the gussets and the two front: sides are: sealed relative: to another io foe region of the punching. However, it is preferred to produce longitudinal hot-sealing seams that extend along the entire strip. Psrtleuiarfy in instance·®, in which the punehings are smaller form twice the width of the gussefs!: foe folded ends of the gussets arc at least: slightly set hack relative to the edge of the strip hr the lateral direction. Subsequent •rimtning «say be advataageoos, in particular, tor achieving as alignment In fids case, ft Is furthermore also possible to provide the longitudinal hot-sealing seams with a widening in the régiót) of the foidcá ends.

The ends of the gussets produced by the ptmchipg are folded over, in particular, in order to insert à reclOSare system extending in the lateral direction 'fe the region of the punching, if is preferred to its« a reciosure;: system whs ptoltfed ships ihat can: be Interlocked with ose another for this purpose; -An interlock can fee; produced, for exaarple, with grooves and teeth Reading in the: lateral direction or similar to a Velcro fastener, lit afoition to such a closure fitaf m also mfeilad tô as a zipper closure irt pasties! applications, a mclmmc system with Interlocking profiled strips that; are; actuated by means of a slider may also fee provided oh the feppdr edge of the bag, CotTespotiding elosnres ate aisoFnown ^-hÉfegaliifâiÂer «lömatéh 1« practical applfeÄus,

The supplied film section ptoktobiy eousists of a ngtlfilaysr fatninated fim hater lays? of weldable ihermoplrsfic plastic, but afs» art thídfer iajoar" that is not weldable at a predefined hot·· sealing. setapsafim. In such: a design,: the strip may be produced by means of hot-sealing wlllîpnt: thereby1 impairing the :appe«mnee of the «im hag. ;fmtäb!e Üítmlnated films: feature:, for example, a hot-seaiog outer layer hf polyethylene that is arranged on the Inside Pi the hag while fite opposite outer layer may consist, lor exemple, of poly ethyl««« lemiitíbaiate (HsTj oriented fEÇfePP). Üe: mveuiibh Is elucidated below with reference to the drawings: that merely show m &mmplaty «mfesuSment lit these drawidgs:

Figure I shows a Oint bag, and

Figures 2a and 2b show the steps offite method for ma«nfaettnmgthe ftfttt bag.

Figure I shows a film bag mamdactured with the inventive method. An upper corner of the film hag is removed it- order to provide a better view of Its interior.

The film bag comprises a first front side it and a second front side 2. between which two gussets 3 inserted in a V-shaped fashion are arranged. The .film bag is sot closed at a hag top d and accordingly features; an opening at this location. The Satly lying film bag with fite inserted gussets 3 is Intended: M a gfofeltfeafeil hag (grewaade: bag) to be subsequently filled. A recinsure system 5 sn the form of a zipper closure consisting of two interlocking profiled strips 6 is provided between the first: front side 1 and the seeottd from side 2 in the melon o f the: hag top 4.

In order to easily arrange the reeiosure system: 5 between the first front side I and the second front side 2 over the entire width of the film bag, the gussets 3 are offset relative to the bag top 4 In this ease, one end 1 of foe gussets is respectively Jfeided over and incorporated mto an assigned longitudinal hot-aesling seam: $ tut the hag edge In order to achieve a t igers seal of the gussets % in the exemplary embodiment shown, the two gussets 3 are respectively connected to the first froth skie I and the second front side 2 over their entire length along the longitudinal hot-sealing seams 8. in order to achieve a reliable seal of the gussets 3, the ends ? are simply folded over at an angle of 45T lire ends

Tare therefore arranged between the assigned gusset 3 ttnd the Iront, wall 2. figures 2a and 2fe show the inventive method for manufacturing the film hag illustrated in Figure I.

According to Figure 2a, a film section 9 of a multilayer film featuring: an outer layer of weldable thermoplastic plastic is initially supplied, Subsequently, paochfogs i fi are produced In the flatly lying film section % wherein

Claims (9)

two pmèbibp M tsre prodaeed laterally admi m- one another and eqÂisîaotly spaced aptt ft * one another late ionghodinal direction. ín this case. the spacing between the punching * H) in the longiixidlnal direction also to the length of the fiim bag to be pnxineed. In msäsr to pbteetats the: method, the: ibldmg edges% 1 to be the produced section is illustrated is Figure 2a. According to -bis figure, the pxatehmp H) are pumueed m big rsgiott of the psseta 3 to be subseqoeodv prodstsfeb, by the gtodueed beiWées tbc trout side «: 2, A. reelosxtre sysifen * also then attached attached PtÉÉHÉPM iSlte: side I between Site: puoeferngs til. This magic tse practical to seextfc the reeldSure system 5 at least agaiast shihiog dotmg this process. 1¾ film section: $ Is: then folded Is the [MÊfâfè # á * id id a way that a ship 12 with the: gussets 3 sn-t itte tent side 5 umuseatk the possets 3 is produced, lie fám segment, of t # i $ E | you .2 so produced * tes lies at one bf the two gussets 3: is a still uaflMded state :. The leading end? of the gussets 3 mentioned to the hans {X> n direction is then obliquely folded over on the same saeh that the cads 1 of the gussets f. produced by the: posehiag operation: are aligned aiopg the physiological direction- The Echo 1 of the: gussets 3 stay te '$ Esao. & m% measia ofa: not *! be folded over dttfe to the fesd of the strip 12. After the fends? have been folded over: they are fixed io this position. The second: iron side 2 is then produced by additionally fbldtng thfestrip 12 such tirai the sseotki firesrt side also covers the gussets% According to So Figure 2b, the longitudinal hotvseafing seams 8 connect the gussets 3 to the first trout side I and the second front side 2. The longitudinal hot-seding seams 8 between the gussets: 3 and the second front side: 2 dsn incorporate the tbided ends 7. 1¾¾ strip 12 is cifcurhltesbally seaied by the assigned longitudinal hoi-sealing; seam t at the locations: at which fire edges of the fragrance section 9 fie on top of one another. individual film haps për ^ lrR ^ y ^ pi'iïtsot 'the spf 12 alter; ® fatel bot-sedhxgsosm 13 baa he «u produced Ip order to the hoftom of the film bag and idler the edges of the strip . the external folding edges 1 f were also separated duringtbis trtmnfisp operation. METHOD FOR PRODUCING SEMI-STARS PATIENT INDIVIDUAL POINTS I. A method for making lofts that have a first and a second front face (1, 2), two V shaped, a longitudinal oidal groove (3) laid between the homiokoc & , 21, and qldahhheeS: py are together with a lunar chief, where m octagonal {3} is the t & (4) ends, and where: the upper end of the brackets (3) is "closed, edged": (a) to prepare a deck #) of the outer layer of aphids: piesttpíó: temtoplasko: made of plastic, fe. M) Siblings, which later were released 14}, e) the main beam (9) is led to a folding station, where the furrow (9) is folded with otoaltwaöM3 | . (3} first decompression page (1} in a tree stroke (12}: let's figure out that d} on the S & 12 (12} m / s) (3) with cutouts (: (0} on one end) : (?) obliquely prehistoric haiiji: he, bed, that with the cutouts Mpezeíi ends (7) a: if | txtxture longitudinally look, and so. », finite. (?) folding« Us on the ski (3} on the foil By further folding the strap (12}), at least one of the two sides (3) is formed by the second homogeneous side: P},., which is: ls; seal (12} perimeter: seal), and the olaalraa: (3} folded ends (7}: let us put a cup in the edge, g} cut the strap (12) into a unique foil. on the cutout (Here}, you have to make your folds (3) your lake. The serine of claim 1, wherein & a second nomlokoidal (2} is formed from a transition foil section, and wherein & stroke ti2} has a longitudinal closing closure (§} along the left edge, which closes the end (?) of one of the occipital (3). 3. The Î. or a method according to claim 2 or 2, wherein the sleeper is formed by a longitudinal direction through the strand (12). 4. Á .3. A method according to the claim, wherein the sealing seams (3) formed on the longitudinal edges of the pouch are provided with displaced ends (?) On the recess. The method according to any one of claims 1 to 9, wherein the first frontal blade (I> is a removable "stone" (5}) prior to forming the second forehead (2). A method according to any one of claims 1 to 5, wherein the strand (12) is guided into a folding unit to fold the ends (?) Of the side chains (3), which are the ends (?) Of the side chains (3) on an inner drive edge (1 i). raises and bends. 7. M '1. ~ he. Claims according to any of the claims, where your pages (3} vegeit (?) Bed die, so that the bent ends (?) For the current {{dali (3> thes '' #: É? |: fluttered in the air. A method according to any one of claims 1 to 9, wherein the thread (12) is pre-tensioned with longitudinal meo & 9. The I ··· tpgypöhfök barrel barrel hay} ahoi: KetostirEyes of cutout widths: (a) less than twice the width (b) of the longitudinal side chains (3) laid in the V-shaped grooves (I, 2). iUî: .. Any of the 1 -9, igettyposttök 'sennia bunny, where the elevator is a multi-layered cascade & tile of the elevator, which is a non-weldable, non-weldable exterior at a specific non-touch temperature, t externally weldable thermoplastic plastic. with a layer