CA2182189A1 - Bag sealing apparatus - Google Patents
Bag sealing apparatusInfo
- Publication number
- CA2182189A1 CA2182189A1 CA002182189A CA2182189A CA2182189A1 CA 2182189 A1 CA2182189 A1 CA 2182189A1 CA 002182189 A CA002182189 A CA 002182189A CA 2182189 A CA2182189 A CA 2182189A CA 2182189 A1 CA2182189 A1 CA 2182189A1
- Authority
- CA
- Canada
- Prior art keywords
- bag
- sealing
- supply pipe
- sealing means
- clamping
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
- B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
- B31D5/0073—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including pillow forming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D2205/00—Multiple-step processes for making three-dimensional articles
- B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
- B31D2205/0011—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads including particular additional operations
- B31D2205/0017—Providing stock material in a particular form
- B31D2205/0023—Providing stock material in a particular form as web from a roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D2205/00—Multiple-step processes for making three-dimensional articles
- B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
- B31D2205/0011—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads including particular additional operations
- B31D2205/0052—Perforating; Forming lines of weakness
Abstract
Bag sealing apparatus comprises a compressed air source which pumps air through a supply pipe (32) towards an opening in a bag. Bag material (14) is advanced by rollers (18) from a roll (12). The material is in the form of two layers open at one side. The supply pipe extends between the layers through the open side and the open side is sealed by heat sealing by two side members (26). Each of the rollers defines a circumferential recess (34) and the two recesses together receive the supply pipe. The apparatus further comprises heat sealing elements (36) for sealing the opening in the bail and spring mounted clamp parts (42) for clamping the bag downstream of the sealing elements to reduce fluid back pressure from the downstream bag.
Description
WO 95121092 r~ E"5,r~
.
~18~1~9 3AG Si~ALIl~G APPA~ATUS
~he invan~lon reia~es to bag eaiins ap~aratus.
1~ is ~;nown to produce air bags, or alr piilows, for use in pacYaging goods to protec~ them. 'rhus, a delica.e ar~icie might be surrounded with air piliows ln a cardboard box to pro~ect it from damage during transport. It is known to make such air pillows from heal seaiabie plas~ics material and the bags are udu~d in a strip with each bag being heat sealed from the next. ~he knowr1 seaiing method is unreiiabie however as the baci~ pressure from air in the bag as i~
is being seaied tends to unseal the bag.
Accoriing to one aspect of the inven~ion there i5 provided bag seal ing appara~us comprising a f luid source ~o pump fiuid to~ards an opening i~ a bag, means for seaiing the opening in the iaag and means r'ar ciampihs the ~ag downstr~am o~ the seæiinlJ means .^
reduce Cluid DacY ~ ressu~.
'n this way, 2s tne bag is ciampei do-whs.ream oi =he se~ling ~eans, thr bac~ p1e~ule does no~ oFerate or~
~5 ~he seai 2nd a good seai can be reliab;y ensured.
Also the quan~it-i of fiu;c introduced into the i~ag 2an be closeiy controlied as .iuid cannot ~scape ~as. t;~e WO 9512109~ P~~
21 82~`8~ ---ciamping means durins seaiing.
lh2 f iuid source may be a source of c~ ed gas, preferaiaiy ~ L,L~_~ed air.
s The s2aiing means may seai the bag in any suitabie ~ay, such as by adhesiv~ or mechanlcal means, bu~
preferabiy the seai inq means comprises heat seai ing means .
1~
The clamping means may comprise a resilient member wh i ch i s urged aga i nst the bag . The res i i i ency a i ds in providing a fluid tighLt seai. Preferably, the c;amping means comprises two resilient ciampin~
I S members arranyed on opposite sides to clamp a bag b~tween them.
Preferaiaiy, the -iampinq means ls arranged to clamp the ~ag beiore the sêaiing means starts to seai trSe 2 G bag .
The clamping means and seai ins means may be mounted separately, bu~ in one embodimen~, a ciamping memD-l-cf the ciamping means and a saai iny member of ~he ~_ sealing means are mounted together on a mountin~
membor. Preferabiy, on the mounling member, the ciampiny member is resiiientiy mounted ahead of tne Wo 95121092 p 1 5 ~
seal ing member so as to enyage the bag b2~0r~ thE
seal ing member . This ensures thal Ih2 bag is ciamped before the seaiing operalion ~ -l^P~. PreferaD;y, a second mounling member is provided Anicil mounts a second c;amping member and~or a second seaiing member.
Conveniently, oniy one of tn~ ,~irsl and second moun~ing ~members is movabie, bul in another emDo~ men both of the first and second mounling members may be movabie towards and away from eacn other. The or eaG-~
moun~ing member is preferabiy moved pneumaticaliy.
The f iuid source may be arranged to pump f luid througr, a f iuid supply pipe.
The apparatus may be arranged to operate in a cycle.
The material for the bag may De provided as a strip which is advanced by advancing means through tr,e apparatus .
The means for advancing the bag material may ta~e any suitable form and preferabiy comprises two rollers side by side between wnicil the materiai pass~s Preferabiy, at ieast one of the roiiers includes a circum~erenlial recess an;i the recess ~r oot~, rec~sseç
together receive the supply pipe.
The bag materiai may be in the form of IWO iayers open WO95121092 1~1,~,, ~C
. I~,\a%~a9 a~ one side ana tne fluid supply pipe may exlehc _2~TA22n .he _ayers through the open side. Means - 5 ~reiera_,ly ~rovided for seaiing the open side According to another aspect of the inventior. there is providea aFparatus for making a bag comprising means ior aavancinS materiai for makins a bag from a seore, ~he malerial being in th~ form of two iayers open at one sida, a stuppiy pipe 2~ctending between the iay2rs 1~ through the open side and means for sealing the op~n side ..,is arrang,ement ailo~As .h2 bag to be filled dir2c~iy and w i thoul comp i i cal i on .
~ _ The ma.srial ma~- be open at both sides but pref2rai~1y is open on oniy one side. The open side of the material is preferably sealed upstream of the end oi the supply pipe. The side sealing means may lake any ~C suilabie iorm and may comprise heat sealing means.
The side seal ing means preferably compris~s a member ~hich is movai~le towaràs and away from the side o~ t:~e material The apparalus preferably includes i,ag seai ing means for sea` in~ the bag aft2r .he bag has ,= been filled from the supply plpe The bag 5ealins means preferably lies downslr2am of the advancing mean~i. The ~ag sealing means pref2rabiy includes a Wo 95121092 p~
memier whlch is movabie ~owards and away from ~ ie ~a~eriai The bas seaiin~ mear,s and ~r.e si;ie aea: n~ ~
means are Freierar;y risJidly corlnec~ed ani mo-ie-toge.her Thê iag s2a;ing means i,emb2r anifor ~he side seaiing means memDer may be movea Ly Fneuma. -means hê mêans for advancing the iag ma~er:a may .ai;e any =uitabie form and preferabiy comprises IWO roi iers ~0 side by side betwêen which the materiai pas3es Preferably, at least one of thê ro;iers inciudes a circumferential recess and the recess or both r2cesses ~ogether rec2eive the sur~;y Fipê
According to a further aspêc~ of tne :n~-en~:on here is providêi appara~us for ma~-ing a .,ag comFr:s;ng a ,~e~ d fluid sU2F;y Fipe ar.d ~wo roli2rs arrarl~ei side b-~ side and be~ween wr.icin ma.erla; for :nai::n - --iag passês, one or both of thê roiiers inciuding a 2Q circumferen~iai rêcess and the recess or ho~,h l-ecêsfies ' oge ther rêCê i v i ng ~he suFp i y , i Fe .
ln this way the amount of f~uid en~er~ng t;~e _ag ~an be preciseiy control;ed as baci;fiow past the rol;ers is iimited Preferabiy the suppi~ plpe substan~ia.ly 'i;;s .he rêcess or ::oth ~è~e55es The bag mater z may be provided as a s~riF P~f2rai;y ia~, âea::nc .... .. ... . . .. _ _ _ _ _ _ Wo 9512109~ 5'~
means is provided immediately past the rollers Thus, the bag seal ing wi 11 leave only a minimal amount of f luid between the seal and the rol lers. Preferably clamping means is provided for clamping a bag downstream of the seal ing means to redu~e f luid bac~c pressure .
Two embodiments of the invention wi 11 now be described by way o~ example and with reference to the 0 R~ --ying drawings, in which:
Fig. 1 is a perspective view of the apparatus of the f irst embodiment, Fig. 2 is a detail side elevation of the heat sezling part oi the apparatus of Fig. 1; and, Fig. 3 is the view of Fig. 2 of the second embod i ment .
Fig. 1 shows the apparatus 10 of the f irst embodiment .
A roll of btg material 12 is stored on a spindle and material 14 from the roll passes over an upper roller 16 and downwardly between two advancing rollers 18 which grip the material and are driven by a motor (not shown) to advance the material in st~ps. The material is in two ~ayers with a fold on one side and being open at the other side.
WO9S/21092 r.~
.
A pneumacic source powers two pislcns ~0 Frov~ie_ aeneal;q ~he advancing roiiers 18, At the lnner er.d cr êach pis~on ,~ is connec.e~i a bag sea;in mêmser ^^
-araiiei to and beneath one o- tinê advanclng roi;ers ,3 The oulêr end of eac;~ r:s.on ^~~ :s conneec~ed ~o an arm 2~ ~Ahicin zxlends upwardi~ rasl .he advanclng roiiers 1& and inwardiy co moun~ an uFr:g;-~ sL~e member ~D. One side member '6 inciuces a nea-~ns êiement 28 and the other side member ^~6 moun~3 a C sprung mounted part 30 . A c ,1l essed air supciy pipe i2 e~Lcends inwardly paraiiei to ~hE advanc.ng ro:'er3 ici 50 as o :ie between t~Ao ,ayers ~I the materiai ',-central ly thereof and turns co -e~,.en~ doh~nw~r_:y -~ -the upright memrers 26 to the aivahc~h r-i:er5 ;~, ~ach advancing rolier 1a includes a _entra:
-ircumferential recess ~. suc:q tha~ . e m,atar;a a-L;i the end of the suppiy pipê 3~ n oe recelve_ :n .r.ê
recesses 3 i The and of t'qe suppiy pipe a^ ioês nct e: cênd downwardiy pasc the p;ane -cn~ai-inS~ ê a7ês O _ - the ad~anc hy ro i ' ers ', 8 .
The bag members 22 arê shown ln de.ai~ irq ~;, ~. ~nê
of the bag members 22 mounts two ~Jertlca;'y sFacêc heacing elements i& The oc:qer 'cag mêmDer ~^ carrles ^' t~Ao sFrin" mounted part= a8 oppcs I:e the heac r.
e,êments 36 E~etween thê spr;ng ~cun.e~ Far 3 J~
provided a 3erraced biade ~iû ~;eic~A the heacln~
W0 9S/21092 r~ c- C ~
&
eiements 36, the bag member 22 mounts a projection ~"
with a resilient end and a similar projection 42 with a resilient end is spriny mounted in an oppositeiy dispose~i position on the other bas memb2r ^^ These par.s are arranged such that wh~n th~ pistor. ~C
0Fera.e5 to brin6 the bag members ~2 together, tho ciamping pro~ections 42 wlli engage first fo;iowe~
~he ;~ea~lng elements ;o and the spr~ng mounted par~s 55 foi iowed _y the serrated l~nife ~C~ engaging the ba~, n use then, ~:r.e ~olor which drives the advancing roiiers advances ~n steps Onc~ the rolier~ 18 have ~2en acivance~i ar.d stopped the pis.ons ^~ are o2era ed and the uFright eiemenls 25 are larough~ together ar '5 the open side oi the material 14 Current is appiied to the heating element .8 to heat seal the edges of the material which is urged against the heating eiement 28 ~y .he spring mounted part 3D At the same ~ime, the members ^~2 are brough~ to6e.her As the 2G members _2 are 'arought .ogether, the clamFing Fr-~ec~:ons en5a~e tne bag mater:ai .o cicse ~
an, the sFriny moun.ed parls 33 .hen urge ~he ma~e~-:cl asa h5~ the heatins elements ~ .o heat s2ai tne ma~er ai in two verticai iy space~i Laositions The :' serrate~i ~nifa G then engages .ha bai~ rc rer_ora~e between the .wo seair- The ~:s.sns ''C ~r~ ~hen ^Fera~ed ~o retract the members and arms d ani_ _he WO 95121092 P~~ c 1' a~ivancing roi iers 18 are advanced agai~ ni i-coirpr2ssed air is suppiied tkrouj;-~ Ine pipe ;, Wt.en the cycie has b~en repea.ed, the --i~s~ bag na= 3~e crea.ed The Dags are crea.ed in a s.r:F ah;i can be lorn o~ a. .he perfora~e~i iine =-ea.ed 5'~ ~he rn:fe ~0 .
;t is seen that the ciamping prcjectlons act to ciose of c the area being sealed by the hea.ing eiemen~ 36 ~O irom oack pr25sure i~rom the bag ~"tich has just been formed 50 tha~ the seais whici. are crea~ed are no.
subjected to that pressure unt; Ihe seais ~a~-a ,~en formed and cooied ~o some ~iegree In .h s ~ay a sea:
.5 r~iiabiy formed, 1 _ ~:~e supFiy pipe; and the recesses i- in -:ie r_ :ers ,3 are s;zed an~i spaced in re:a~:on .c the tt.i-i~ness of the bag ateriai, ' suc~. tha; i~,~''2 3r no aii =an escape backwards be.ween t;~e suF~;y pipe ~~ and ~;~e ~0 roilers 18 and thus the amount of air suppiie~ to eac;-bag can be contro ~ l ed prec i se i y and a un i f orm sel- i es of bags produced.
.
~:~e suppiy pipe may -uppiy c3mpresse& air a. ;psi ~5 The bag materiai may be any su; .a;: ie nea~ se, iasie ,,aterla; Nt~iC~ provides an air _arrier ~nd may se o~
densit-~ poly~thyiene iLDr_,, -or eY.ampie The s~a::ng _ _ _ _ _ _ _ _ _ _ . _ _ _ .
Wo 95121092 1:~ J, ~
.
8 r~ l ~ 8 9 - 1 ti conlact time may be 1.i seconds.
The second emDo.~iment 15 shown ln Flg. 3 and ls simi ;ar to the embodiment oi Figs . i and ` . Oniy the dirfer~nces ~rom the ~irsl embodiment wiii be descrihed and the same reference numerais wiil be used ~ or e~u l va i ent f ealures .
The oniy difference in the second ,-mh~l~ir~ is tha~
i~_ the projec~ions 12 are not provided on the bag members su~ ins.ead are provided on separateiy operatrd rams inot shownj. This enabtes greater ant independent control over the deiay belween b~g ciamping and bag sealin~ and cutting. It aiso ma;;es the hea~ing eiemen~s 3~ easier to change.
.
~18~1~9 3AG Si~ALIl~G APPA~ATUS
~he invan~lon reia~es to bag eaiins ap~aratus.
1~ is ~;nown to produce air bags, or alr piilows, for use in pacYaging goods to protec~ them. 'rhus, a delica.e ar~icie might be surrounded with air piliows ln a cardboard box to pro~ect it from damage during transport. It is known to make such air pillows from heal seaiabie plas~ics material and the bags are udu~d in a strip with each bag being heat sealed from the next. ~he knowr1 seaiing method is unreiiabie however as the baci~ pressure from air in the bag as i~
is being seaied tends to unseal the bag.
Accoriing to one aspect of the inven~ion there i5 provided bag seal ing appara~us comprising a f luid source ~o pump fiuid to~ards an opening i~ a bag, means for seaiing the opening in the iaag and means r'ar ciampihs the ~ag downstr~am o~ the seæiinlJ means .^
reduce Cluid DacY ~ ressu~.
'n this way, 2s tne bag is ciampei do-whs.ream oi =he se~ling ~eans, thr bac~ p1e~ule does no~ oFerate or~
~5 ~he seai 2nd a good seai can be reliab;y ensured.
Also the quan~it-i of fiu;c introduced into the i~ag 2an be closeiy controlied as .iuid cannot ~scape ~as. t;~e WO 9512109~ P~~
21 82~`8~ ---ciamping means durins seaiing.
lh2 f iuid source may be a source of c~ ed gas, preferaiaiy ~ L,L~_~ed air.
s The s2aiing means may seai the bag in any suitabie ~ay, such as by adhesiv~ or mechanlcal means, bu~
preferabiy the seai inq means comprises heat seai ing means .
1~
The clamping means may comprise a resilient member wh i ch i s urged aga i nst the bag . The res i i i ency a i ds in providing a fluid tighLt seai. Preferably, the c;amping means comprises two resilient ciampin~
I S members arranyed on opposite sides to clamp a bag b~tween them.
Preferaiaiy, the -iampinq means ls arranged to clamp the ~ag beiore the sêaiing means starts to seai trSe 2 G bag .
The clamping means and seai ins means may be mounted separately, bu~ in one embodimen~, a ciamping memD-l-cf the ciamping means and a saai iny member of ~he ~_ sealing means are mounted together on a mountin~
membor. Preferabiy, on the mounling member, the ciampiny member is resiiientiy mounted ahead of tne Wo 95121092 p 1 5 ~
seal ing member so as to enyage the bag b2~0r~ thE
seal ing member . This ensures thal Ih2 bag is ciamped before the seaiing operalion ~ -l^P~. PreferaD;y, a second mounling member is provided Anicil mounts a second c;amping member and~or a second seaiing member.
Conveniently, oniy one of tn~ ,~irsl and second moun~ing ~members is movabie, bul in another emDo~ men both of the first and second mounling members may be movabie towards and away from eacn other. The or eaG-~
moun~ing member is preferabiy moved pneumaticaliy.
The f iuid source may be arranged to pump f luid througr, a f iuid supply pipe.
The apparatus may be arranged to operate in a cycle.
The material for the bag may De provided as a strip which is advanced by advancing means through tr,e apparatus .
The means for advancing the bag material may ta~e any suitable form and preferabiy comprises two rollers side by side between wnicil the materiai pass~s Preferabiy, at ieast one of the roiiers includes a circum~erenlial recess an;i the recess ~r oot~, rec~sseç
together receive the supply pipe.
The bag materiai may be in the form of IWO iayers open WO95121092 1~1,~,, ~C
. I~,\a%~a9 a~ one side ana tne fluid supply pipe may exlehc _2~TA22n .he _ayers through the open side. Means - 5 ~reiera_,ly ~rovided for seaiing the open side According to another aspect of the inventior. there is providea aFparatus for making a bag comprising means ior aavancinS materiai for makins a bag from a seore, ~he malerial being in th~ form of two iayers open at one sida, a stuppiy pipe 2~ctending between the iay2rs 1~ through the open side and means for sealing the op~n side ..,is arrang,ement ailo~As .h2 bag to be filled dir2c~iy and w i thoul comp i i cal i on .
~ _ The ma.srial ma~- be open at both sides but pref2rai~1y is open on oniy one side. The open side of the material is preferably sealed upstream of the end oi the supply pipe. The side sealing means may lake any ~C suilabie iorm and may comprise heat sealing means.
The side seal ing means preferably compris~s a member ~hich is movai~le towaràs and away from the side o~ t:~e material The apparalus preferably includes i,ag seai ing means for sea` in~ the bag aft2r .he bag has ,= been filled from the supply plpe The bag 5ealins means preferably lies downslr2am of the advancing mean~i. The ~ag sealing means pref2rabiy includes a Wo 95121092 p~
memier whlch is movabie ~owards and away from ~ ie ~a~eriai The bas seaiin~ mear,s and ~r.e si;ie aea: n~ ~
means are Freierar;y risJidly corlnec~ed ani mo-ie-toge.her Thê iag s2a;ing means i,emb2r anifor ~he side seaiing means memDer may be movea Ly Fneuma. -means hê mêans for advancing the iag ma~er:a may .ai;e any =uitabie form and preferabiy comprises IWO roi iers ~0 side by side betwêen which the materiai pas3es Preferably, at least one of thê ro;iers inciudes a circumferential recess and the recess or both r2cesses ~ogether rec2eive the sur~;y Fipê
According to a further aspêc~ of tne :n~-en~:on here is providêi appara~us for ma~-ing a .,ag comFr:s;ng a ,~e~ d fluid sU2F;y Fipe ar.d ~wo roli2rs arrarl~ei side b-~ side and be~ween wr.icin ma.erla; for :nai::n - --iag passês, one or both of thê roiiers inciuding a 2Q circumferen~iai rêcess and the recess or ho~,h l-ecêsfies ' oge ther rêCê i v i ng ~he suFp i y , i Fe .
ln this way the amount of f~uid en~er~ng t;~e _ag ~an be preciseiy control;ed as baci;fiow past the rol;ers is iimited Preferabiy the suppi~ plpe substan~ia.ly 'i;;s .he rêcess or ::oth ~è~e55es The bag mater z may be provided as a s~riF P~f2rai;y ia~, âea::nc .... .. ... . . .. _ _ _ _ _ _ Wo 9512109~ 5'~
means is provided immediately past the rollers Thus, the bag seal ing wi 11 leave only a minimal amount of f luid between the seal and the rol lers. Preferably clamping means is provided for clamping a bag downstream of the seal ing means to redu~e f luid bac~c pressure .
Two embodiments of the invention wi 11 now be described by way o~ example and with reference to the 0 R~ --ying drawings, in which:
Fig. 1 is a perspective view of the apparatus of the f irst embodiment, Fig. 2 is a detail side elevation of the heat sezling part oi the apparatus of Fig. 1; and, Fig. 3 is the view of Fig. 2 of the second embod i ment .
Fig. 1 shows the apparatus 10 of the f irst embodiment .
A roll of btg material 12 is stored on a spindle and material 14 from the roll passes over an upper roller 16 and downwardly between two advancing rollers 18 which grip the material and are driven by a motor (not shown) to advance the material in st~ps. The material is in two ~ayers with a fold on one side and being open at the other side.
WO9S/21092 r.~
.
A pneumacic source powers two pislcns ~0 Frov~ie_ aeneal;q ~he advancing roiiers 18, At the lnner er.d cr êach pis~on ,~ is connec.e~i a bag sea;in mêmser ^^
-araiiei to and beneath one o- tinê advanclng roi;ers ,3 The oulêr end of eac;~ r:s.on ^~~ :s conneec~ed ~o an arm 2~ ~Ahicin zxlends upwardi~ rasl .he advanclng roiiers 1& and inwardiy co moun~ an uFr:g;-~ sL~e member ~D. One side member '6 inciuces a nea-~ns êiement 28 and the other side member ^~6 moun~3 a C sprung mounted part 30 . A c ,1l essed air supciy pipe i2 e~Lcends inwardly paraiiei to ~hE advanc.ng ro:'er3 ici 50 as o :ie between t~Ao ,ayers ~I the materiai ',-central ly thereof and turns co -e~,.en~ doh~nw~r_:y -~ -the upright memrers 26 to the aivahc~h r-i:er5 ;~, ~ach advancing rolier 1a includes a _entra:
-ircumferential recess ~. suc:q tha~ . e m,atar;a a-L;i the end of the suppiy pipê 3~ n oe recelve_ :n .r.ê
recesses 3 i The and of t'qe suppiy pipe a^ ioês nct e: cênd downwardiy pasc the p;ane -cn~ai-inS~ ê a7ês O _ - the ad~anc hy ro i ' ers ', 8 .
The bag members 22 arê shown ln de.ai~ irq ~;, ~. ~nê
of the bag members 22 mounts two ~Jertlca;'y sFacêc heacing elements i& The oc:qer 'cag mêmDer ~^ carrles ^' t~Ao sFrin" mounted part= a8 oppcs I:e the heac r.
e,êments 36 E~etween thê spr;ng ~cun.e~ Far 3 J~
provided a 3erraced biade ~iû ~;eic~A the heacln~
W0 9S/21092 r~ c- C ~
&
eiements 36, the bag member 22 mounts a projection ~"
with a resilient end and a similar projection 42 with a resilient end is spriny mounted in an oppositeiy dispose~i position on the other bas memb2r ^^ These par.s are arranged such that wh~n th~ pistor. ~C
0Fera.e5 to brin6 the bag members ~2 together, tho ciamping pro~ections 42 wlli engage first fo;iowe~
~he ;~ea~lng elements ;o and the spr~ng mounted par~s 55 foi iowed _y the serrated l~nife ~C~ engaging the ba~, n use then, ~:r.e ~olor which drives the advancing roiiers advances ~n steps Onc~ the rolier~ 18 have ~2en acivance~i ar.d stopped the pis.ons ^~ are o2era ed and the uFright eiemenls 25 are larough~ together ar '5 the open side oi the material 14 Current is appiied to the heating element .8 to heat seal the edges of the material which is urged against the heating eiement 28 ~y .he spring mounted part 3D At the same ~ime, the members ^~2 are brough~ to6e.her As the 2G members _2 are 'arought .ogether, the clamFing Fr-~ec~:ons en5a~e tne bag mater:ai .o cicse ~
an, the sFriny moun.ed parls 33 .hen urge ~he ma~e~-:cl asa h5~ the heatins elements ~ .o heat s2ai tne ma~er ai in two verticai iy space~i Laositions The :' serrate~i ~nifa G then engages .ha bai~ rc rer_ora~e between the .wo seair- The ~:s.sns ''C ~r~ ~hen ^Fera~ed ~o retract the members and arms d ani_ _he WO 95121092 P~~ c 1' a~ivancing roi iers 18 are advanced agai~ ni i-coirpr2ssed air is suppiied tkrouj;-~ Ine pipe ;, Wt.en the cycie has b~en repea.ed, the --i~s~ bag na= 3~e crea.ed The Dags are crea.ed in a s.r:F ah;i can be lorn o~ a. .he perfora~e~i iine =-ea.ed 5'~ ~he rn:fe ~0 .
;t is seen that the ciamping prcjectlons act to ciose of c the area being sealed by the hea.ing eiemen~ 36 ~O irom oack pr25sure i~rom the bag ~"tich has just been formed 50 tha~ the seais whici. are crea~ed are no.
subjected to that pressure unt; Ihe seais ~a~-a ,~en formed and cooied ~o some ~iegree In .h s ~ay a sea:
.5 r~iiabiy formed, 1 _ ~:~e supFiy pipe; and the recesses i- in -:ie r_ :ers ,3 are s;zed an~i spaced in re:a~:on .c the tt.i-i~ness of the bag ateriai, ' suc~. tha; i~,~''2 3r no aii =an escape backwards be.ween t;~e suF~;y pipe ~~ and ~;~e ~0 roilers 18 and thus the amount of air suppiie~ to eac;-bag can be contro ~ l ed prec i se i y and a un i f orm sel- i es of bags produced.
.
~:~e suppiy pipe may -uppiy c3mpresse& air a. ;psi ~5 The bag materiai may be any su; .a;: ie nea~ se, iasie ,,aterla; Nt~iC~ provides an air _arrier ~nd may se o~
densit-~ poly~thyiene iLDr_,, -or eY.ampie The s~a::ng _ _ _ _ _ _ _ _ _ _ . _ _ _ .
Wo 95121092 1:~ J, ~
.
8 r~ l ~ 8 9 - 1 ti conlact time may be 1.i seconds.
The second emDo.~iment 15 shown ln Flg. 3 and ls simi ;ar to the embodiment oi Figs . i and ` . Oniy the dirfer~nces ~rom the ~irsl embodiment wiii be descrihed and the same reference numerais wiil be used ~ or e~u l va i ent f ealures .
The oniy difference in the second ,-mh~l~ir~ is tha~
i~_ the projec~ions 12 are not provided on the bag members su~ ins.ead are provided on separateiy operatrd rams inot shownj. This enabtes greater ant independent control over the deiay belween b~g ciamping and bag sealin~ and cutting. It aiso ma;;es the hea~ing eiemen~s 3~ easier to change.
Claims (37)
1. Bag sealing apparatus comprising a fluid source to pump fluid towards an opening in a bag, means for sealing the opening in the bag and means for clamping the bag downstream of the sealing means to reduce fluid back pressure.
2. Apparatus as claimed in claim 1, wherein the fluid source is a source of compressed air.
3. Apparatus as claimed in claim 1 or claim 2, wherein the sealing means comprises heat sealing means.
4. Apparatus as claimed in claim 1, 2 or 3, wherein the clamping means comprises a resilient member which is urged against the bag.
5. Apparatus as claimed in claim 4, wherein the clamping means comprises two resilient clamping members arranged on opposite sides to clamp a bag between them.
6. Apparatus as claimed in any preceding claim, wherein the clamping means is arranged to clamp the bag before the sealing means starts to seal the bag.
7. Apparatus as claimed in any preceding claim, wherein a clamping member of the clamping means and a sealing member of the sealing means are mounted together on a mounting member.
8. Apparatus as claimed in claim 7, wherein on the mounting member, the clamping member is resiliently mounted ahead of the sealing member so as to engage the bag before the sealing member.
9. Apparatus as claimed in claim 7 or claim 8, wherein a second mounting member is provided which mounts one of a second clamping member and a second sealing member.
10. Apparatus as claimed in claim 9, wherein only one of the first and second mounting members is movable.
11. Apparatus as claimed in claim 9, wherein both of the first and second mounting members are movable towards and away from each other.
12. Apparatus as claimed in any of claims 7 to 11, wherein the or each mounting member is moved pneumatically.
13. Apparatus as claimed in any preceding claim wherein the apparatus is arranged to operate in a cycle.
14. Apparatus as claimed in claim 13, wherein the material for the bag is provided as a strip which is advanced by advancing means through the apparatus.
15. Apparatus as claimed in claim 14, wherein the means advancing the bag material comprises two rollers side-by-side between which the material passes.
16. Apparatus as claimed in claim 15, wherein the fluid source is arranged to pump fluid through a fluid supply pipe.
17. Apparatus as claimed in claim 16, wherein at least one of the rollers includes a circumferential recess and the recess or both recesses together receive the supply pipe.
18. Apparatus as claimed in any preceding claim, wherein a fluid supply pipe is provided and the bag material is in the form of two layers open at one side, thefluid supply pipe extending between the layers through the open side.
19. Apparatus as claimed in claim 18, wherein means is provided for sealing the open side.
20. Apparatus for making a bag comprising means for advancing material for making a bag from a store, the material being in the form of two layers open at one side, a supply pipe extending between the layers through the open side and means for sealing the open side.
21. Apparatus as claimed in claim 20, wherein the material is open on only one side.
22. Apparatus as claimed in claim 20 or claim 21, wherein the open side of the material is sealed by side sealing means upstream of the end of the supply pipe.
23. Apparatus as claimed in claim 22, wherein the side sealing means comprises heat sealing means.
24. Apparatus as claimed in claim 22 or claim 23, wherein the side sealing means comprises a member which is movable towards and away from the side of the material.
25. Apparatus as claimed in any of claims 20 to 24, wherein the apparatus includes bag sealing means for sealing the bag after the bag has been filled from the supply pipe.
26. Apparatus as claimed in claim 25, wherein the bag sealing means lies downstream of the advancing means.
27. Apparatus as claimed in claim 25 or claim 26, wherein the bag sealing means includes a member which is movable towards and away from the material.
28. Apparatus as claimed in claim 25, 26 or 27, wherein side sealing means is provided for sealing the open side of the material upstream of the end of the supply pipe and the bag sealing means and the side sealing means are rigidly connected and movable together.
29. Apparatus as claimed in claim 28, wherein the bag sealing means and the side sealing means are movable by pneumatic means.
30. Apparatus as claimed in any of claims 28 to 29, wherein the means for advancing the bag material comprises two rollers side-by-side between which the material passes.
31. Apparatus as claimed in claim 30, wherein at least one of the rollers includes a circumferential recess and the recess or both recesses together receive the supply pipe.
32. Apparatus for making a bag comprising a compressed fluid supply pipe and two rollers arranged side by side and between which material for making a bag passes, one or both of the rollers including a circumferential recess and the recess or both recesses together receiving the supply pipe.
33. Apparatus as claimed in claim 32, wherein the supply pipe substantially fills the recess or both recesses.
34. Apparatus as claimed in claim 32 or claim 33, wherein the bag material is provided as a strip.
35. Apparatus as claimed in claim 32, 33 or 34, wherein bag sealing means is provided immediately downstream of the rollers.
36. Apparatus as claimed in claim 35, wherein clamping means is provided for clamping a bag downstream of the sealing means.
37. Apparatus substantially as described herein with reference to Figs. 1 and 2 or Fig.3 of the accompanying drawings.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9401913A GB9401913D0 (en) | 1994-02-01 | 1994-02-01 | Bag sealing apparatus |
| GB9401913.0 | 1994-02-01 | ||
| US34529594A | 1994-11-28 | 1994-11-28 | |
| US08/345,295 | 1994-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2182189A1 true CA2182189A1 (en) | 1995-08-10 |
Family
ID=26304252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002182189A Abandoned CA2182189A1 (en) | 1994-02-01 | 1995-02-01 | Bag sealing apparatus |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0749388B1 (en) |
| JP (1) | JPH09511201A (en) |
| AU (1) | AU1542495A (en) |
| CA (1) | CA2182189A1 (en) |
| WO (1) | WO1995021092A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2350597A (en) * | 1999-06-01 | 2000-12-06 | Andrew Laitt | Method of packaging goods |
| DE102019004313A1 (en) * | 2019-06-19 | 2020-12-24 | Rainer Gmbh | Air cushions as packaging protection |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH672767A5 (en) * | 1987-01-21 | 1989-12-29 | Ilapak Res & Dev Sa | |
| EP0350617A3 (en) * | 1988-07-15 | 1990-04-11 | PMB Holding B.V. | Method for making, filling and closing packages from a tubular web, and device for executing the method |
| DE3837709A1 (en) * | 1988-11-07 | 1990-05-10 | Rovema Gmbh | TUBE BAG MACHINE |
| GB8902320D0 (en) * | 1989-02-02 | 1989-03-22 | Du Pont Canada | Detucker for vertical form and fill machine |
| US5231817A (en) * | 1992-06-25 | 1993-08-03 | E. I. Du Pont De Nemours And Company | Pouch collapsing assembly for vertical form, fill and seal machine |
-
1995
- 1995-02-01 AU AU15424/95A patent/AU1542495A/en not_active Abandoned
- 1995-02-01 WO PCT/GB1995/000205 patent/WO1995021092A1/en active IP Right Grant
- 1995-02-01 CA CA002182189A patent/CA2182189A1/en not_active Abandoned
- 1995-02-01 EP EP95907089A patent/EP0749388B1/en not_active Expired - Lifetime
- 1995-02-01 JP JP7520452A patent/JPH09511201A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995021092A1 (en) | 1995-08-10 |
| AU1542495A (en) | 1995-08-21 |
| JPH09511201A (en) | 1997-11-11 |
| EP0749388A1 (en) | 1996-12-27 |
| EP0749388B1 (en) | 1998-12-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20020201 |