CA2035644A1 - Textile-carrying bag made of synthetic termoplastic material and process of manufacturing the bag - Google Patents

Abstract

ABSTRACT
TEXTILE-CARRYING BAG MADE OF SYNTHETIC THERMOPLASTIC MATERIAL
AND PROCESS OF MANUFACTURING SUCH BAG
This invention relates to a carrying bag, par-ticularly for carrying textile material, which bag is made of synthetic thermoplastic material and comprises side walls having top edge portions bonded to handles, wherein said top edge portion of one of said side walls is optionally adjoined by a closing flap, which has a slit for receiving the handle provided on the opposite side wall. In order to provide a textile-carrying bag which is of that kind and which has a sufficient stability and strength even when the hand s are made of the same material as the body of the bag, the edge por-tion of one side wall is constituted by an infolded edge por-tion, which defines a fold line, and another edge portion, which adjoins said infolded edge portion and optionally has been backfolded upwardly and is optionally succeeded by the closing flap, which is joined to said backfolded edge portion by a further fold line, the edge portion of the other side wall is reversely folded inwardly and each of the reversely infol-ded edge portions is bonded to the adjacent side wall by means of welds which extend throughout the length of the bag.

Description

Yrj ~ '1 '1 rExT ~L, ~ c~yIl~lr ~ E OF r,Yr~l rllETI~ T!-!F'~ L~ ;TI~ TErInL
arln ,r~ ,sL~r~ .F "nr`'llFI~CTllr~Ir`lr' T~IE nPr-r~ .Q C ~ J r~ L! ~ ~ r) L F T ~ E I '~ E I~! T I Or ielr! of the ~n\ler~tinn ~__ . . _ This in\lentiun relates to a ssrr\!ioo bao, rarti-cularlv For czrryirn textile rnateria~ hic~ han is ma~e of svnthetic thermool~stic material anrl co~orises sirle l,lalle hav inn too erlne oortions bnnrlerl to hanrlle3, ~LIhYrein onD oF sair' tDo erlne oortions is ootionally adjoirler' by a closin~ flaD, ich l~as a slit ~or receivinn the ~anrllD ~rovir'erl on the ODOD-site sir.'r l,!;.lll. Tse iovention relates also to a process of manuFarturino such c~rr~/inn baoe.

nescrintion nF thP arior ~rt ~ erman Patent SDecification 1,436,~61 rlisclosDs baqs an~ a nrocess of ~anuFacturinn them. In that process a laterally noen tube is initiallv For~erl~ith an in~ardly rli-recter! Fold, which i5 inten~ed to constikuts the botto~ of the bao, and the tube is also Formed with infolo~ed tDP erioe nor- ~ .
tionaO The enr.!s af tbe hanrJles of the carryino ban are ~elr'erJ l~.
ta the insirle cr the top erloe ooItions or infnldec~ er'oe oor- .
tions. ...

~ rlerman UtilitV ~odel 1,9~5,155 also r~iscLoses a ;carrVino oao l~hich is made o~ synthetic thermo~lastic ~aterial and is Drovir!ed l~ith a nriphole near the toD erloe of each sioe ,lall oF the bao. ~acent to the rlrioholes the two side l,lalls :~
of the carr\linn bar~ are rein~orcerl by beinn reversely Folr!erJ. .;
IF such b309 are intenr!ed to be userl as relativelv l,Jide baos, ~or c~rryino textile rnaterial, they are orovir!erl l~lith a hanrlle ~a~e of relati\/e~lv st,ronn injection-molr~e~ ~aterial, such as i~ knnl"n ~rom ~erman IJtilitv ~orlel 7~ 19 ~71~ rather than ;,lith ' ~;

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a r?riallGle in the ~an ~laLl ar ~lith a hanr!lr? narle of limp na--terial. In acGorr~arlce l,~ith ~erman l!tility !~odel. 771 1g 5~1, the handles ere intenrally forrnerl!llith reinForrino l~ebs, l~hich e~itenr~ alnnr~ -the tGo erine nortions aF -the bao and l,lhich l~hen the ~anriles ha\/e oeen l~el~erl -to -the carr\/inn ban constitutz ~eans Far stiF~e~ina the tao eclqe oF the te~tile-carryinn haa sa -tha-t saicl taa e~oe rs~ains relatively strai~ht as the bao is beinn carried ani th~ textile materi~l containn~ in thD hao ,lill not be campresserl. P5 a resul-t, E,aid l<nol~n bans rio meet the requirements to be co~nolier~ith by a baq For carryino textile rnaterials but sairl knol,Jn bags hb\/e nssential disarJ-vanta~es as reoards their manufacture anr! the;.r recyclinn aFter useO In the first nlacet different rnachines for nrocessing nlastic material are reElui~erl to rnake the baos because the body of the ban and the handles are narie of r1iFfernnt ~lastic ~aterials. Illhen the bao i5 to be recycled, aFter use, the strnng hanclles rnade by injectian noldin~ rnust be seoarated fram the body oF the bao by exoensi\~e rnanual wark beFore the handlns can be renranulated separately Fram the ~ynthetic ther-moplastic ~naterial.

"ummarv o~ the Invention For this reason it is an object of -the invention to orDvirle for the transoortation o~ textile l~aterials a carry-ing ban which has hanr!les that rnav be mac!e oF the sarne material as the bodv oF the bao and L,~hich has a sufficient stability anrl resistance to deForrnation so that the textile contents of the bao will not be creaserl rlurinq transoortation. ~esides, it i9 desirerl to nrotect the rielicate contents aF t.he ~ag from nletness and ~nnisture.
, That ob~ect i3 accomolishe[l in accorrlance L~ith ~: the invention ln that the too edqe oF one sir.~e l,lall is consti-tuter.~ oy an infolded er.~ne Portion~ Illhich rlefines a fold line, and another eriqe oortion, l~hich ad~o;ns sairi lnFolrierl edrle fi 4 ~

onrtiDn and ooti.on~]lly h2s heen backfolr-ier~ url~LIar~ anr3 i~
aoti.3nall~J succeerlell bv the closinn Flao, Illhicil i9 joinerl to s~3ir! b3cl<folr'2n edoe ooltion bv a Furthor Fr31d line, the edne oortion nf th2 oth!?r side wall is rrverselv Falr!e~ in-arrlly an~ e~ach nF the re~Jers2l~ infnloed e~10r nortions ir-~onr'eo to the arljacent sirle l,lall by mzans oF llelr!s ll3hish extenr3 throur!hout th~ lenqth of the baq. That ~esinn of the top edoe rortians of the side walls ensures the stifFnnss which is required for the resistance to defor~ation of the baq ~ade of synthetic thermoplastic ~aterial so that additional ~ebs ~ade of Flexurall\J stiff injection-rlPlded ~aterial l~3il]
no lonqer be requireri and the handles can be ~ade of the sa~e thermoDlastic ~ateriql as the body oF the ban. '~ecause a resistance to rlefor~ation i9 ensurer~, the closina flaP ~,3ill enoaoe the top edqe pF thb ooposite side wall l,3hen the baa is closed and there will he no kinks or folds l,lhich coul~ ore-ent said clusinr~ flaP fro~ co~Pletely coverino that tao edoe. In an e!~bodiment of the invention the Protrudino Dortion ' '' of the inl,Jarr!ly reversel~/ F31derl top edne oortion of one side ~,lall ~aV be backfolrlErl up~3arrl1\/ so that the top ri~s af the finished baos lJhich are rleliverer!l,3ill alre-dy have the r!e~ :
sirec! for~ In an ~lternati~ie, the Protrudino nortion of t~e 'b3c~ 25 delivered may still be oarallel to the side IJall of th~
~carrvino bag and ~av b re~/erselv foldec! upwardly bv the l~ser onl\/ I!3hen thiC is ciesirer! so that the closinn Flar] ~l~ill then ~be~for~e~ only L-3y another suitable folc!inc! operation. In that '' e~bodiment that protruding oortion ~ay have later Lly rlisoosed : :
r3~erforation lines and the closinq flap ~ay be formed in case ; ~r3f n~eed by the user in that said perforation lines are -torn ooen and the protruding portion is reversel~/ Folded. A slit ';
is orovicled on the line at ~,Jhich the hanrlle provirler! on the opoos~ite side extends through the closinq flap when the carry--inq bag is closecl anr! before the orotrurling portion is back-folr!er! t~hat slit may be closer! bV a perfor-ation line.

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Fnr s c~3irQble ~urther stiFF~ninn, a further 3Pam uel~, I.Jhich e~tenrls thraunhout t~e lenn-th oF the bag, ~ay be provirler! bet~leen th2 t~o narallel Fold lines oF the tao e~e pnrtions of said ane si~ie ~lall.

qccordin~ ta a further ~:iesirable feature of the invention, 300ts oF ores3ure-sDnsitivE~ a~heai\/e are orovi~e~
an that sirie ~,Jall aver which the closinr~ ~lap is laid to close the bar~ so that the closing flao can releasably br joined to said soats.

nreferred processes of ~anufacturinQ the tex-tile-carrvinn ba~ in accarriance lJith the inventian ~lill be recite~l in the deoen~ent cLaims.
' Prief ~escr~otian_of the nrawinq Figure 1 is a diagram~atic side eleva-tion showino a~n embodiment of the textile-carryina baq in accorti2nce with ;the invention.

Figure ~ cunsists of four diaorammatic sectional views,;~hich illustrate steos of a process for ~anufacturino a~textile~carryinn baa as shown in Fioure 1.

Fiqure 3 is a rliaara~atic sectional vie~l taken on the section line III-III in firlure 1.

Finu~re 4 i 9 a rJiaqram~atic oerspective view 5ho inq~those~Dortions~of the textile-carryino bao in accordance ith~the invention~which are tlisoose~ between the two vDrtical nes~lnd~lcated~in phantom in Fiqure 1.

fit?ure 5 consists of Five dianr~P~mmatic sectional v~ie~a;whiah i~]lustrat~e the steps oF a orocess of ~anufacturinq a seron~ e~bodl~ent of~the carryint? bao in accordance with the invention.~

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;-inure ~i is a dia~ra~matia si~e elevation show-inn a -third ?~bodi,~ent oF tho carrVinn beo in accordance with the ia\/Dntinn. ..

,'iaure 7 is a dianraTn~atic sestional view which i5 similar t,o Finure 7(C) but is apolicable to the third embo- .
di~ent.

Fi~ure '~ is a diaoram~atic sectiDnal view which i~ similar to Fioure 5(d) but i~ appli~abl~ t~ a fourth e~-bodiment of the carryinn bao in accordance with the invention.

~etailEd ~escriotion af the Preferred Embodimellts :.
:, Further details and advantages af the present invention will now be explained with reference to the illus- :.
trative e~bodiments shown in the drawing. . :

a textile-carrying baQ 1 in accordance l,Jith a :.:
~ :first embodiment:o~ the~ invention is shown in Fiqures 1 and 3 : ~ and:comari3es a bottiom fold 7 arld side L,lall~ 3 and 4. The oDr- ~
tlJns~of the ~an 1 ar2 Joined at the ends of the baq by seam .;
i,Jeld~ no~t 3hol~n. ~

; P orocess oF~manofacturinG the bao in ac~ordance with~th~e:;invention will now be exnlained with refereoce to the s~e~ctlonal~ views~ ssiqnated:a), b), c) ~ d) in Flqure ~. A B
5~ is~:~s~hown~i:n~Figure ~2)j a~shee:t web is initially doubled on ts~elF~to constitute:a laterally open tube orovided with a bottom Fold~ Th:at~oortion:of the tube which i9 int2nded to fnrm the side~wall~3 is lonner thàn the oartion intended to form the sid~e~walI:4~so~that a ~trip-shaped ~ortion oF the side wall 3 : .
~t~ protrude~s~beyond the side wall 4. The tL~o tap edqe Portions oF
the~s:ide~ alls;3~ and 4 are subsequently reversely Folded in-;w~a:rdly~ as:is:shollln in Figure 7b)o The tan Fold lines 5~ 5~ lie 2~3~

Lln th.~ sarne l~v~l .onr-' `re p-drall.rl -trJ each Dther~ ~t a dis-tance From said tnn ~slrJ lines 5, 5~, the infolde~. oortirJns are Fir~nlv joinP~ tc t~e side walls 3 and 4 by lonoitudinally extendino sear~ elds .. ano 7. The seam Illel~s orovidzd un the sirle l,lall 3 and those oraviderl on the sir!e wall LL are sozrer' f'rom the Folcl lines 5 and 5~, resoectively, by about the same r!istance. In the forther orocess step illustrated in FiguIe 7c) the handles consistino oF the same material 35 the body r~F the han are lairl into the laterally open tube anrl are ~oineri by searn welrls ~ anrl 9 to the reversely folded oartinn~ and to the outer aortions oF the llalls 3 anrl 4. A5 is shollln in Fiaure ..7o), tha-t ourtion of t!~e sheet l,JhiCh orotrurles ~ol,~n~,Jarr.!lv heyonrl the ~3eam l,leld ~; is fald~d unwar~lv First anrl is subsequently f'nldec! doll~nllJarrllv about the folo line 5'. Ry that l2st folrlinn ooeration a closinn f~laa 12 is Formerl, I/lhich can be :Lairl aver the Fold line 5 oF thz ~irle Illall IL to close the carryinq baq~
Arljacent to the fQld line 5~ the side LJall 3 has a slit 10, throur~h which the hanr!le 11 welded to the si[ie wall ~ can be oas~ed so that the closinq Flap 17 can readily be laid an the .
outsirle surface oi~ the IIJall 4. The arranger~lent oF that slit 10 is ~partlcularly aoparent FFom the persaectivz viaw in Figure 4. ' ' Fur a F.urther stabilization oF -the too ri~ of th~e bar~ wall 3, a sea~ Je~ may be provided, wnich extends throuqhout the to~p edne oF the ~llall 3. 5uch a searn Lleld 13 is orov~ided in the embodi!nent sha!.ln in Fiqure ~ and joins the in- :
Fo~ld~ed~ adaa oortion 14 anrl the uowardly backfolrieri edqe por-tion 15 to each other at the top f`old lines 5 and 5'.

In the en~bodiments shollln in Fiqures 1 anri 3, spots 16 and 19 of prqssure-sensitive adhesive may be apDlier.! ~' :to th~e upper oortian oF the side ~lall 4 and rnay initlally be : ~: covereri by: silicone ta~es 17 anri 1a. Illhr~n said taoes 17 and 1~ :
:~ : ha~/e been oeeleri oFF anr! the hanole 11 has been oasserl From '.:
beIollJ through the slit 1[1, the Flao 17 IJIill contact the outsirle .:
surFace of'~ the baq and can releasably be bonrled to said spots 16~ a~nrl 19 bv the aonlication of a sliaht oressure. :' 7 ~3~3~
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FinllIe 5 c~nsi3ts ~F Five rletail view~3 a) ta e), I,!hicb illustra-te e~u-ther orucess o~ manuFa~turing the baa in accnrdanc2 ll~ith the invPn-tion in an er~di~ent .~hich differs Fram that sholJn in Finure 1. I~ Finure 5 the ontionsl adcliticinal seam wPlcl 1~ ancl the soots 16 and 19 of pressure-sensitive arlhesive are no-t shown. In that ~rocess a sheet is clnublzd on itselF in a Fir~3t step a) to form a laterally open tube, ~,lhich has a bottom fold 7J. The two top ed~es af the laterally ooen tube are :infolderl in the same length, as i9 shown in Fiour~ 5b). Thereafter the bottum edges of -the infoldecl portiQns are joined throughout the length of -the bag to the cide ~.~alls 3 and 4 by searn Illelds ~1 en~ Z2, which extend alono the folc lines and are parallel thereto.
Put beFore the seam weld 7.1 i5 formed, a strip ..7.3 which is reversely foldeo in l.l-sha~e i5 inserted into the laterally 002n tube in such a manner that the longer len 74 of the strip 73 i5 included in the seam weld 21, as is apparent fro~ Fi-gure 5c). ~.fter that process step the handles 7.5 and Z6 are lai~ into the laterally ooen tube ancl are subsequently joined by searn welds ~7 and ?~ to the infolded portions of the la-terallv ooen tube and to the outer portions of the laterally open tube, as is shol,~n in Finure 5d). As is shown in Fiaure 5e), the ll-shaoed strio 73 is subseaLIently reversel\/ fslded uowarri1v about the seam weld 71 50 that a rlosino flao 79 is formed, which at its toD fold line }0 has a slit, not shown, throuqh which the carryinq handle ~6 can be oassecl.

Fi4ures 6 and 7 and Fiqure ~ illustrate two ~urther e~bodiments of the carrying bag in accordance with the inventionO In the figur2s of the drawing, like raference : characters desiqnate like oarts. In the thircl embocliment shown in fiaures 6 and 7 the aorti.on 31, which in the ~inished bag ~rotrudes duwnwardly beyond the seam weld 6, has not been Foldrer! upwardly but in case of need can be pulled by the user uowardly out of the ban and laid over the hanrlle 11', which is ,.

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~ubsaauentlv oasse[~ uDwarri]\t throuoh l;he slit 10, as i5 shown in r ioure i~. To ensure that the downwar~ly orotrudino portion 31 can be pulled ou-t oF -the baq, that portion must not ~2 leterally fixerl and For thi.s reason is providec! wi-th l2teral slits or o~tionally with late~al oerforation lines ~i.

The four-th embodi.ment of the carryino ban ln : .
accor~ance with the invention is shown in Fi~ure ~ and di~Fers from the embocliment shown in Fioure 6 in that the down~Jardly protrudinq partion 31 is folded inwardly once sn that it is ll-shaDed in cross-section. ~ orefolded edge portion 30 is thus obtained 90 that -the Dartion ~1 can more easilv be laid about the handle 7r~ when the oortion 31 has been pulle~ out of the textile-carr\/ing baqO The slit 10 is orovid2d ad~jasent to the oreFolde~ edge oortion ~0.

In comparati\/e tests it has been Found that the Fact that the -too edge portions have been Folded in the manner tauqht by the inventlDn an~ the corresoonding sea~ weld3 ooti~
onally includinn also the additional seam weld 13 shown in Figure 3 have been provi~ed may~result in such a hiqh stiffness of the too rim of the bag that it is oossible to provide the oao with handles marle of the same thin material as the body of the ban rather than with strong injection-~olde~ handle~ h~v-ing reinforc1no webs exten~inq alonq the to~ ri~ of the baQ. . ``

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Claims (5)

1. A carrying bag, particularly for carrying tex-tile material, which bag is made of synthetic thermoplastic material and comprises side walls having top edge portions bonded to handles, wherein said top edge portion of one of said side walls is optionally adjoined by a closing flap, which has a slit for receiving the handle provided on the opposite side wall, characterized in that said top edge portion of said one side wall is constituted by an infolded edge portion, which defines a fold line, and another edge portion, which adjoins said infolded edge portion and optionally has been backfolded upwardly and is optionally succeeded by the closing flap, which is joined to said backfolded edge portion by a further fold line, the edge portion of the other side wall is reversely folded in-wardly and each of the reversely infolded edge portions is bonded to the adjacent side wall by means of welds which ex-tend throughout the length of the bag.

2. A carrying bag according to claim 1, characterized in that a further seam weld extends between the fold lines of said top edge portions throughout the length of the bag.

3. A carrying bag according to claim 1, characterized in that spots of pressure-sensitive adhesive are so provided on said opposite side wall that the closing flap can releasably be joined to said spots.

4. A process of manufacturing a carrying bag accord-ing to claim 1, characterized in that a sheet web of synthetic thermoplastic material is doubled on itself to form a laterally open tube, which optionally has a bottom fold, and in such a manner that one side portion of the laterally open tube protrudes beyond the other, the two top edge portions of the side walls of said tube are infolded and are joined by respective longitu-final seam welds to the respective adjacent side walls, an ?owardly backfolded edge portion and a closing flap ad-joining said backfolded edge portion are formed from the pro-truding portion of said one side wall, and the handles are joined by seam welds to said backfolded edge portion and to the side walls.

5. A process of manufacturing a carrying bag ac-cording to claim 1, characterized in that a sheet web of syn-thetic thermoplastic material is doubled on itself to form a laterally open tube, which optionally has a bottom fold, and in such a manner that one side portion of the laterally open tube protrudes beyond the other, the two top edge portions of the side walls of said tube are infolded and are joined by respective longitudinal seam welds to the respective adjacent side walls, and the protruding portion of said one side wall is adapted to receive a handle then the protruding portion has optionally been reversely folded.

5. A process according to claim 1, characterized in that the protruding portion is laterally provided with slits or perforations.

7. A process according to claim 5, characterized in that the said protruding portion is provided with a perfo-ration line, which is adapted to be opened in case of need to provide the slit.

8. A process of manufacturing a carrying bag accord-ing to claim 1, characterized in that a flat sheet of synthetic thermoplastic is doubled on itself to form a laterally open tube, which optionally comprises a bottom fold, in such a man-ner that the side walls of the laterally open tube are con-gruent, the two top edge portions of the side walls are infolded and are joined by respective longitudinal seam welds to the side walls, before the formation of one of said seem welds a strip which has been folded to have a U-shape is so in-serted that the longer leg of said strip will be included in said one seam weld as it is formed, the U-shaped strip is subsequently reversely folded uowardly about said one seam weld so that the closing flap is formed at the same time, and the handles are joined by seam welds to said top edge portions and to the outer portions of the side walls.

9. A process of manufacturing a carrying bag accord-ing to claim 1, characterized in that a flat sheet of synthetic thermoplastic is doubled on itself to form a laterally open tube, which optionally comprises a bottom fold, in such a man-ner that the side walls of the laterally open tube are con-gruent, the two top edge portions of the side walls are infolded and are joined by respective longitudinal seam welds to the side walls, before the formation of one of said seam welds a strip which has been folded to have a U shape is so inserted that the longer leg of said strip will be included in said one seam weld as it is formed and the fold line of the U-shaped strip is so arranged that the U-shaped strip when it has been reversely folded can be used as a closing flap by the user.

10. A process according to claim 9, characterized in that a slit for subsequently receiving the handle joined to the other of said side walls is formed in said U-shaped strip adjacent to the fold line of said strip.