CA1280310C - Method of making prismatic containers with planar gable surfaces without lateral ears - Google Patents

Abstract

Abstract The subject of the invention is a method of making prismatic containers without lateral ears and with planar gable surfaces as closure ends for a continuously supplied tube of flexible material filled completely with a liquid substance, the lateral zones connected to the transverse sealing strip being transverse flattening members. This avoids the formation of ugly projecting ears at the closure surfaces.

Description

03~0 i' ~he inventlon re~ates to a meth~d of makir~g pri~matic con~a;n~r~
ithout la~ra~ ears, with closl~re sur~a~s in the form ~
enga~in~able surf~es and transverse se~ling.striP fronl a cont.inuously supplied ~u~e oF ~le~:ible ma~erial illed ~om-pletely ~i th a li~uid ~uhstan~e, I~,ac~ines for pa~king li~uid s~lbst~,n¢es in ~ontainels o flex-i~le material are kn~wn. These contain~rs h~ve the charac~er-isti~ parallel~pipedic. f~m wit.h ug]y and inconvenient latera~
~ar~ ~hi~h a~e b~t ~t the e~erior of th~ body o~ the ~ont~in~ and secured ~hereto.
In the apparatus~s for ~aking such cont.ainers a planar tape of flexible material is supplied from a reel and coiled round a tu~e sealed in the ~ongitu~inal dire~io~ and con-tinuous~y filled wi~h the liguid material to be packe~, These known ~pparatuses working continuously at a ~peciic liquid pressure are in thems~lves aseptic and th~refore particularly suitable for packi.n~ sterile su~st~nce~ ~1ithout contact with a~mospheric air, ~o c.ushion of a~m~spheri~ ai~
is inclu~ed in ~he ~ntainers filled and sealed with these apparatuse~s, .
O~her types of pa~-ki ng machines ~re known in whi~h the liquid to be packed is filled in~ ~oxes made ~rom cardboard w}~ose opening i~ su~$~quently sealed in t.he characteris~ic form of a hood ~ith ~wo gab~e surfaces, ~hese p~kirly ~n~chine$ not operatin~ at~ a specifi~ lev~l o~ the ~iquid pressure nece~arily enclose in th~ cont~iner a ~L~$hion of \

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~28~3~0 ~tmospheric air. In a~dition, for ~s~pti~ operation with ~uch niachir,e~. a tunnel subje~ted to pre~sure must ~e us~d7 conse~uent~y, a c~shion o~ sterile air is ~eeessari~y cn ~losed in the oon~ainer.

Hithert~ no packagin~ method is known in ~hich ~l~uJtaneously t}-le tw~ pro~lem$ of elimj.n~ting the undeslra~le outer ~ater~l ear~ and also eli~in~ting the air ~shion jn the interior of the container are s~lved.

The invention is ~herefore hased on the pro~lem of eliminating the disadv~nta~es present in t.~le prior ar~ and p~oviding a method Lor makin~ priSJnatic cont~iners without l~teral ears and ~ith ~losure ~urfa~es in the ~or~ ~f en~aging ~able surf~ces, no air cu~hion bein~ ~nolosed in the interior of the container, Thi5 problem is solv~d ~ccordin~ ~o the invention in that the lateral zone~ ccnnected to the transverse se~lin~ strip ~r~ pushed to tlle interior o~ the ~ube prior to en~ ement. by tr~nsverse flattenin$ mem~ers.

~ccordiny ~o ~ convenient embo~imen~ of the method a~ording to the invention the later~l zon~s p~shed to the interior ~f the tuhe are ~ro~ght hene~th the resuJtin~ gable su~fa~e~
an~ ~ene~th the tran$verse sealiny strip, An example of embodiment ~f the invention ~ e explained in detai1 herein~ter ~ith t.he aid ~ ~he drawings, wherein:

Fig. 1 is a sehemati~ perspe~tive vi~w of the con~inuou~ly supplied tube of llexi~e materi~ which is ~om-ple~ely i~1ed ~i~h ~ liquid s~bstan~e, tr~nsversely flattened, sealed and sevexed, and .

, - ' ~X~3~3~) Fi~. ~ is a perspe~tive view of the oontainer with flatten~d lower end ~n~ upper end shaped in the ~orl~l o~
hood ~:i th two ga~le or roo~ sur~aces.

As apparent ~rom Fi~ 1 the lateral zones Z, 4, 2', 4' are p~shed by kno~n me~n~ers not shown to the interic)r o~ a tube 1 to avoid the projec~ion o~ triangular e~rs whi~h would result from the Lla~enin~ of ~he transverse $e~1in~ strip '~, The ends of the cont.ainers accordinyly co~nprise t.riar~gu~r zones 2 , 4 , 2 ', 4 ' which are place~ benea~h ~.he ~able ~urfaces ~, 3'. The container comprises at eac~ end ~JO yahle surfaces. Thes~ ga~le surfac~s 3, 3' can ~e subse~uent~y appli~d so that they run perpendicularly ~o t.~e side f~es o~ the container 1.

ig. ~ the ¢ontainer 1 ' is illust~atcd with the ~lattened or en~aged bot~o~ and the upper ~nd in the ~h~ra~te~i~tic form of a hood wit~ll t.~o g~ble surfa~e$0 This ~ontailler 1 ', which has been sealed at a specif ic liquid pres~l~re, ha~ no air ¢l~shion in the inte~ior.

The method according to the inven~ion c~n be c~r~i e~ out with packaging rna~hines of any desired construction, Th~s, for exarnple, packing machines with verti~.al arr~ngement o~n ~e used in which ~ne or rnore sealing members are ~et in con-tinuous oper~tion by intermittent crank drives or con~eyln~
belts. ~le method ¢a~ also ~e ~arried out with packa~ing machines via sealing members arran~ed on ~ horizontal whee~
wi~h continuous rotation~

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Furthermore, t:he method a~cordin~ ~.o the invention may ~e carried o~t in p~ckaging ma~hin~s wit~l one or rl~r~ individ~-ally fed ~nd intermittL~ntly actuated st~tion~.

The es~ential point i5 that the pa~kaginy m~hine$ used op~rate at a specific liquid press~re, the structur~1 and Lunction~l ~r~angemen~ being immaterial provided it is suitable ~or produ~in~ ~ontainers with ~wo ~ble surfaces ~t the ends and ~ithout an ~ir ~ushion in the in~erlor~

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Claims (2)

1. A method of making prismatic containers without lateral ears, with closure surfaces in the form of engaging gable surfaces and with transverse sealing strip from a continuously supplied tube of flexible material filled completely with a liq-uid substance, in which the lateral zones connected to the trans-verse sealing strip are pushed to the interior of the tube prior to the engagement by transverse flattening members.

2. A method according to claim 1, in which the lateral zones pushed to the interior of the tube are brought beneath the gable surfaces and the sealing strip.