CA2115561A1 - Open-head drum - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

An open-head drum for storing and transporting dangerous liquid or solid substances has a body made of thermoplastic material. The open-head drum body is produced simply by cutting out the upper bottom of a new or used tight-head drum.

Description

10 FEB ~94 09:02 I~IRUSER I~ERKE BRUEHL 211 5 ~ 6 ~

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LIDD13D DRU~I
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The invention relates to a lidded drum which has a body made o ther~opla~tic material and may be alo~able by a drum j lid and ten~ion ring in a gastight ~nd li~uid-tight manner for .~
~toring and for tran~porting 601id~ or liquids. The invention is further directed to a ne~ method for making thi~ lidded . drum body.
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Lidded drum bodi~ are conventionally made by blow molding in a particul~r gplit blow mold. ~urrent lidded drum~ hav~ a . .. .
~as~ive, stable ~urface flange which i~ up~et at the upper ~, outer ri~ of the drum ~or r2aeiving the dru~ lid and a8 an butment for the ten~ion ring engaging from unde~neath. ~e ~tabl~ ~urace flange i8 up8et directl~ fro~ the material ~f the wall o~ .the drum ~od~ inside the blowinq mold after wing a thermoplastic, tubular pari~on by me~n~ of an annular mold ~ide. After molding the pr~for~ ~or the ~idded ~, drum, flagh (pinch-off) iB separated at the pinch-off areas of the tub~lar parison at the top and bottom. On the ~ide o~ the feed openin~ of the dru~ body, the pinch-~ff consist of a cap~shaped ring part whi~h i~ arranged around ~ ~ow mandr~l and has a greatest pos~i~le diameter in order to preven~ large quantitie~i of fla~h. Thi~ cap piece i~ neatl~ ~evered in the f~eam area of~ the up~et ~riurface flange.
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:' ' ' ' ', ~ ~ . ' ' ' . '. ~ . ' ~ : ' ' .' ' ` . , ' ~ ` ' 211~61 US-~-3 696 ~62 ~9 al~o par~ of the prior art, ,~nd descrl~es a conical containQr th~t is ~anufactured by lnjection moulding ('H'i~
one aastlng~) and ha~ nap-on lld that is o~ ~oft plastlc.
'The snap-on lid is o~ ~o~t plastlc so th,~t, when the container iB
~elng opened, it can b~,a drawn ~ver a snap pro~,e¢tlon that i8 ~'or~od on th~ upper e~ge or th~s cont~iner. ~ i~ ~nown, howeYer, n coVer ~h,~t is of soft plastic m,~kes it more difficult to stack ,~ plurality o~' ~illed contain~r~ on~,~ on top of t~e ot~er. In order that l~provcd ~t~cking characterlstics ,~n be i~parted to the ~nown container, the inner flange edZgQ of the lid rests on ~upporting ~tcp that is forw,ed on the inner wall of the container. ~owever, thls ~ontainer i8 not well suited ~or use ~or rine~grAin materi~l, for when it iQ being f~ ed, partlcles c~n ~ccumul~te on t~e insidc ~F~upporting 6t~EZp. ~his result6 in i~proper seating of' ~hc lid~ or els~ re,guire6 that the sup~orting ~tep the thoroughly clffan~d be~ore t~ lld lc put on.
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Ç! ~owever~ this in~e~tion-moulded container has nothing to do with ~; the ~nufncture and configuration o~ the lldded drum according to the prcssnt in~entiont at no place doe~ th~s document contain any ~, r~rence or de~cription of the manu~actur~ng proces~ and Sorr~tlon of thc lidded drum Acoord;og ~o the pr~ent lnventlon.

la , 10 FEB '94 09:03 M~USER WERKE BRUEHL P.5 - 21~61 - .
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. The production o~ ~uch a lidded drum which i8 closable in a ga~-tigh~ manner by tension rinq and drum lid i~ known e.g.
fro~ C~-PS 5~7 041 ~nd de6cribed in detail therein.
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m~nufa~turer of pla~tic drums who ha~, ~or ~xa~ple, only one blow mo~ding machine at hi3 diQposal would llke to ~eet ., .
the requirement~ of variou~ cu~tDmer~ and make different shape~ and ~ize~ o~ drum~ or different product~ (e.g. bunged drums, lidded drum~, ca~is~e~6, etc.) on his ~achine. For this purpose, ~ ~peci~l blow mold i8 required for each p~oduct.- ~f the drum manufacturer want3 to convert rom one pxoduct, e~g. a bunqed drum, to another product, e~g. an lid~e~ drum, he i~ re~uired to ~hut down the blow molding maahine, and to dismantl~ ~he blow mold part~ for the bunged drum from the mold mounting plate a~ well a6 the pe~ipheral ~upply lines (e.g. f~r ~ydraulic oil, cooling water, ~hermo~ta~, etc.), and sub~equentl~ tbe blow mol~ parts for the iidded drum must be re-atta~hed and the lin~ connections mu~t be re-connected. This ~au~es comparatively long ~topp~e~ ~nd result~ 1~ stoppage expenditure6 for the bl~
I mo~ding ~achine.
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It is an objec~ of the present invention t~ pxovide a lidded drum and a method ~or making ~ame whi~h doe~ not . - 2 -;

10 FEB '94 09:03 Mf~USER WERKE BRUEHL P.6 211~561 .
req~i~e stoppages o the blow molding maahine and does no~
need a change of the blow mold.

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Thi~ object i~ attained a~cording to the invention in that ~`I a fini~ed bunged ~xum with an upper carrying and tran~port j.'! ring ~handling ring) and wi~h at 12a~t one ~u~ghole opening in i.~ the upper bottom i8 u~ed a~ a ~tarting product, with the drum ~, .
. body of the lidded drum being ~ade, by cutting the uppe~ bottom .
out o~ the bunged drum in ~ch a way that a f~ed opening with `, ~reat diameter iz formed, whereby the carrying and tr~n~port ~, rin~ remain~ at tbe top of ~he drum body ag a ~upport for a corre~pondingly matched drum lid and pos~ibly as an abutment , .
~i for a ten~ion ring which enga~es from ~nderneath.

.` By way of thi~ method, to first make a completely fini~hed ~unged dru~ ln a blow mold for a bunged drum a~d then to u~e ~; this bunged drum a~ a ~tarting pr~duct for the sub~equent p~oduc~io~ o an lldded drum body in o~ly one additional work;ng ~tep - cuttin~ ou~ the upper bottom Gf the ~unged drum the skilled per~on, in thi~ oa~e, tbe dxum manufaaturer i~
~ provided with a simple, yet important technical t~aching in ;~ order to in~xpen~ively make on an indu~tri~l 6cale a great nu~ber of di~ferent type~ of drum~, to thereby aahieve a ~i plurality o~ advantage ;
i - only one blow ~,old, na~,eLy a bunged drum blow mold ~o~

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FEB '94 09: 04 M~3USER WERKE BRUEHL P. 7 ~ 2115~61 ., .
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bunged dxums with an upper carrying and t~ansport rin~, is required for ma~in~ ~un~ed drum and lidded drum bodie3;
a co~t-inten~ive, ~pecial lidded drum blow mol~ i~ no longer re~uired ~reduced inve~ment);
3toppage and ~toppage expenditure~ of the b~ow molding machin~ encoun~ered during each conversion from one produc~ blow mold to another product blow mold are elLmlnated;
bunged drums ~nd lidded drum~ ~an be made at ~ same time and different cust~mer order~ can be filled ~imultaneou~ly;
a bu~ged drum ~or liquid goods i~ convertible to an industri~lly uaable lidded dr~m ~or liquid or ~olid good6;
the lidded drum c~n be ~ade immediately from a new bunged drum or later rom a used bunged drum which was used onc~
or for several times;
the change/conver~ion of the bunged drum into a lidded drum involve~ extremely simple manufacturing technique~;
the lidded drum body ha8 a ~mooth interior openin~ section (thi~ i~ ad~antageou~; a) for the upper drum gripper claw, b) for the e~ptying of re~idue~, c) no ad~e~ion of re~idual contents in the hollow bo~der a~eas);
th~ lidded drum ha~ the sam~ hei~ht and volume a~ th~
bunged drum;
the lidd~d drum (with or without drum lid) aan be handled meohanically with the s~me drum gripper~ e ~anner as ,.

FEB '94 09: 04 Y,RUSER WERKE ERUEHL P. 8 . .
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,~ the bunged drum;
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.~ - theff upper area of the handling ring servef3 as a eealing counter-~urf~ce;
- the underfide of the handli~g ring f~ferv~ff5f a~f ~n abutment for thef tension r~ng and a-cff a suppo~t surface for the lo~er dru~ gripper claw;
- t~e bunged drum can ~e ohipped already with a drum lid, ~`~ t~fnEfion ring and po6sibly with an in~liner; th~s th~
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~! ~f6fe-value of the ~rum i~ enhancefd with re~pe~t to , . recycling;
., - theff drumf lid can ~ffe provided with at leaBt one bunghole ri~; and ~ - the h~ndling ring can be mechanicall~ refini~hed in a .j .
., ~fimple manner when greAter demandfs (e.g. ~ightne66) are .. d~mandeffd of the lid and drum body.
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~ I~ known lidd~fd dru~s, the cap-shaped top flash ~t th~f ,, feed opening was generally sep~rated by a sub6tantially borizo~tal cut in the es~fentially a~ial dru~ wali p~ojecting ~`l up~d~f beyond the outer 3urface flan~e. ~hus, the cu~ting edge i~ 6ituated directl~ at the upper rim of the drum.
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i ~f contrast thereto, ~he lidf~ed drum accordin~ to the inven~ion i~ char~cterized by a promLnent, ~ub~t~nta~l~y axial J au~ting efdge or autting ~urf~ce on the insi~e of the drum wall f ~nd ~n~fid~ff the upper c~rrying .nd tranf~port rin~ at a , . .
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10 FEB '94 09: 05 ~I~USER WERKE BRUEHL P. 9 ~- 211~fil di~tance (approxim~tely 20 mm to 80 ~) belsw the uppor rim o~
the drum ~nd upper su~face of the carrying and transport rin~. The carrying and tr~nsport ring rema~ ns on t~e lidded dru~ body a~ ~ massive upper end so that a lidded drum bod~
wi~hout a drum lid (tension ri~ or an empty drum) has handlin~ ~ing which can be gra~ped and i8 8L~ple to manipulate. ~nother very important ad~antage of the novel lidded d~um resides in the ability to grab and tran6port the closed lidded dru~ with drum lid and ten~ion ring as well ~8 the open lidded drum ~ithout drum lid by means of drum gripper tool~ (parrot beak~ which ar~ conventionally u~ed for bu~ged ~teel drum~. Conventional lidded drum~ reguire particular drum grlpper tool~ which, however, cannot ~e used to grab and transport bunged drums.

The teaching a~cordinq to the in~ention enable~ a p~odu~tion of lidded dxums from new bunged drums immediatel~
or later (after inte~medi~te storage or ~torage).

According to anoth~r embodiment of the in~ention, any of used bun0ed drum~ can al~o be utilized as starting product~
a~ter initial use or aft~r multiple u~e (a~ bun~ed drum) for ~ub~equent conver~ion to lidded drum~.

Thig teaching i~ ba~ed on ~he realization that bunged drum~ with only a comparatively ~mall ieet or dischar~e - 6 ~

10 FEB ~94 09:05 'rl~USER I~IERKE BRUEHL P. 10 211~5~1 ~' ., opening lbun~hole rim) can be emptied only with difficulty or at great expenditure after be~ ~g u~ed or filled with a low-vi~cosity substance ~e.gO lacquer or solvent-ba~ed adhe~i~a ), even when ~pecial mea~ure~ are ~ken in the de~ign of the drum upper bottom to attain an'optimum emptying of ~e6idue~. A~ a rs~ult, su~stantial problems ari~e in reconditionin~ the drum~ for po~ible re-u~e or multiple u~e of the bunged drum for other content~. Thi~ mean~ that certain drums which were charged with a particularly hazardou~
or low-vi3cosity material can thu~ only be used a~ dispo~able container~ and must ba di~po~ed o~ a~ a ~pecial wast~ a~ter one-time ~e. This î~ co~t inten~ive and uneconomical and represent~ a eonsi~erable ~train on the environment as a result of increa~ing paokaginy wa~te.

Beaause o~ the retained residual liquid~, a reconditionin~
of ~uch bunged drums invol~e~ high co~t~ and large quantitie~
f washing liquid which must be reproces~ed.

a reæult of the teaahing according to the invention to convert used bunged dru~æ into lidded drum bodie~ by cutting out the upper bottom, a vely ~ignificant ~ontribution i~ mad~
to a dimini~hing o~ the current packaging ~ol~e and a redu~ ion of a ~train on the environment. ~he technical teaching, which i~ ~Lmple per ~e and co~t-savinq, offerc the con~ume~ a mean~ for opti~al reco~ditioning of alr~ady u~ed : . ~ ., . ~ , : .
-, . : , ~ ' ,, . ' `~ 10 FEB '94 09: 06 M~lJSER IAIERKE~3RUEHL P. 11 ~ 2115S61 , . .
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,. ~,, ~, h~iner~ together with the po~lb~lity of multipl~ u~e, even 'l for different Gontent~ to the~eby expand the ~ange o~
applications.
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~, ~y cuttinq out the upper botto~ of the bunged dru~ and t`, introducing a oomparatively l~r~ openin~, a ~imple ~nd ,. . .
~ opti~al ~leanin~ and reconditioning of the u~ed contaiher i~
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~ade po~sible at a lo~ co~t in connection with u~e o~
~achinery ~e.g. wa~h bru~he~3 and at compara~ly 6m~11 amount~

of cleaning a~ents and wa~h water.
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. The container whiah is reconditioned in this manner and , aon~rt~d to a lidded drum body i~ provided with a drum lid .,, matching the large size of the cut container opening and :~, inoludin~ a lid ~eal and ie closed by mean~ of a correspondin~
tension xing in a ga~-tight and liguid-tight ~anner.

A~ a re~ult o~ thi~ ~impl~ mea~ure, a pre~iously clo~ed aontainer, e.g. a pla~tic bunged drum, can be reusod as a lidded drum b~dy or can b~ a~igned some o~her industrial use.

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The lidded dru~ which i9 made ~n such a way that something -:
~i new 1~ made ~ro~ something old i~ particularly ~uitable for ,~ u~ with an ih-liner or foil bag o~ with an insertable pla~tic ¢ontainer in ca~e a contact of the new content with the (u~ed~
pos~ibly contamin~ted drum wall should b~ avoided. :~

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; 10 FEB'94 09:06 MRUSER WERKE BRUEHL P.12 --- 211~61 .
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Through making lidded drum bodies in accordance with th~
invention ~rom ol~ bunged drums, aonsiderable time ~nd cost~
are ~aved (sa~ing~ on material and energy) in compari80n to the p~oduction of a conventional, co~pletely new lidded drum body.

~ ven the upper ~ottoms with bun~hole opening, cut out of ~he bunged dxum, need not be dispo~ed of as wa~te o~ proce~sed ~8 ~egenerated waste- According to another advantageous e~bodiment of the in~ention, a ~uitably matched and ~eparately ~ade circumferential outer ring flan~e i~ glued or welded onto the cut out upper botto~ with at least one bunghole opening a~d ~erves a~ a lid rim o~ upper abut~ent for the ten~ion ring loc~ 80 that the upper bottom of the bunged drum can be u~ed ~18 H druDI lid fl~r the lidded drum l~od~

Bec~use o~ the problems related to final di~posal of fiber drums made from rolled and ~l~e~ krat paper, which may also ~e coated with all~minum ~oil or printed on wit~ ink, the indu~t~y in~reasingl~ replace3 fiber drum~ with plastic lidded drums. The lightwoight lidded drum~ made from bunged drum~
a~cording to the invention are par~icularly ~uitable for use with in-liners or in~ertable thin-walled cont~iner~ for application~ in which ~i~er drums are u~ed.

In the foll~wing, the invention iY explained in more - . .

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10 FEB '94 09:07 t1RUSER WERKE BRUEHL . P. 13 ; 211~3~61 . . .

, : d~t~il and de~¢ribed with referenc~ to ex~plifled embodiment~
r,~ shown in the drawing~.
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~ ~ig. 1 is a fra~mented longitudinal gection of a ., .
conventional plastic bunged dru~ with upright handling r~ng (prior art);

-Fiq. 2 is a partially ~ectional ~ide Y~ew o~ a . plastic lLdded drum ~ody according to the invention;
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Fig. 3 ~how~ another conventional pla~tia hunged ', drum with additional lower bottom rollin~
.~, ring ~prior ~t);

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- ~ig. 4 16 ~ partial longitudinal ~ection, on an enlarged ~cale, of another known bunged drum with upriqht handling ring;
' Fig. 5 ~how6 the bunged dru~ of Fi~. 4 a~ a lidded drum body a~cording ~o the ~`~ . invention; :
,; , Pig~. 6 to 9 ~how dif~erent lid con~truction~ ~or e ' lidde~ drum body according to the invention; :

, ., 10 FEB '94 09:07 MI~IUSER I~ERKE 13RUEHL P. 14

2 1 ~ 6 1 ~ ` `
`' . 10 to 13 4how modified embodiment~ of the carryin~
and tran~poxt ring o$ a lidded drum body ,;, ~ acc~ding to th~ inv~n~-ion;

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Fi~. 14 is a longitudinal ~ection of thé upper drum area of a lidded d~u~, aa~ordin~ to the in~en~ion ~., Fig. 15 is a corresponding partial view of lidded d~u~.with flat drum lid; and ~ig. 16 a~ enlarge~ detail of a lidded drum according to the invention, with engaging dru ~ grlpper.

In ~igO 1, referenc~ nume~al lO de~ignates a large-capacity plastic bunged drum ~or ~toring and tran~portin~ in particular h~zardou~ and liquid contents, having a ~u~stantially c~ drical dru~ wall 18. The upper botto~ 12 of th~ ~unged drum lO i~ provided wit~ at least one bunghole opening 14 which aan be clo~ed in a gag-tight and ~iquid-tight manner and ha~ a compar~tively very 8mall diameter. In e~8entially axial prolong~tion of the drum wall 18, the bunged drum lO ha~ at it~ upper outex peri~eter a oircumerential oarryinq and transport rinq l~ or handling rin~ for appliaation o~ me~hanical drum g~ippers. ~he dru~
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10 FEB '94 09: 08 MRUSER WERKE E}RUEHL P. 15 ~ 2~5~61 .~ .
qripper~ - e.g. on a for~ stacker vehicle - ha~e ~n upper and a lower dru~ gripp~r ala~ (parrot be~k) and are ~uitable for pla~ti~ bunged drum~ ~ith upri~ht handling ri~g and in like ma~ner or co~ventional bun~ed steel drum~.
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~, Acaording to tbe inventiQn, ~he upper bottom 12 is cut out ~. .
of the bunged drum ~D of Fig. 1 in a ~imple mann~r near the inner dia~eter of the upright han~lin~ ring 16 60 a6 to ob~a~n a~ ~hown in Fig. 2 - a lidded drum body 20 which can be cleaned easily and ha~ a lar~e uppor feed opening 32 ~o as to be uitable for u~e with solid content~ a3 well.
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On the inside of the drum wall 18 at a distance of appr~ximately 20 to 8~ mm below the handling ring ~6 o~ below the feed opening 2~, r~pe~tively, this lid~ed drum ~ody 2~
-j ha# a promihent cutting ed~e 30 along which the upper ~otto~ 12 o~ the former bu~yed drum 10 was cut out. :

Application ~ the me~hod accordin~ to the invention for ; making lidded dru~ is suitable for all types of bunged drum6, ; with ~he caxrying and tran~po~t rin~ ~eing sub~equently usable : as a lid ~upport.

Fig. 3 show~ anoth~r b~nged drum ~2 ~hich i~ pro~ided with bottom rolli~g ring 44 and also ~uitable as a ~tarting pr~duct for ~aking a lidded drum~

; - 12 -10 ~EEI '94 09:08 Mf~USER WERKE E~RllEHL P.16 211.~6~
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The bung~d drum8 (~tarting products) can be made in different way~. In general, bunged drum~ are blow ~olded in `. one pie~e. It i~, however, al30 known to make drum~ e . g . by rotary centrifugal method, by injection molding, or in '5. comb$nation with extru~ion me~hod. Thu6, a drum body with lower bottom can be made eOg. by blow molding, with an upper ~ ottom, which i~ previou~ly made through injeotion molding and .. ~' includes an integral handli~g ring, bein~ welded onto this ~ drum p~efo~m.
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^ i Fig. 4 ~how~ an enlarged parti~l 3e~tion of a bunged drum ;.~ (10, 42). The carrying and tran~port ring 16 ia arranged in direct axial extension of the drum wall. For engagement of the .,~
drum gripper claw~, the carryinq a~d t~an~port ring 16 has a ~u~stanti~lly horizontal contact surface ~6 which i~
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;-. ex~rnally acce~iblR frQm underneath and a ~ubstan~ially v~rtical contact ~ur~aa~ 48 whi~h is internally ~cces~ible . from ~bo~e. ~he upper ~ottom 12 having a bungh~le ri~ with - .
bunghole opening 14 a~ranged in a ~un~hole casing S0 i6 conne~ted with the ~rum wall 18 via a aonical annul~r ~ura~e part 52. The point o~ attaahment o~ engageme~ groo~e 54 formed therein fo~ the upper drum g~ipper claw extends with it groove ba~e at a di6tance below the level plane S8 of the horizonta~ contaot surface 46 of the carrying and t~ansport ri~g 16.

,, `~ -- 13 --,, 10 FEB '94 09:09 M~USER WERKE BRUEHL P. 17 - 211~5~1 The lidded drum body ~0 ~hown in Fig. S i8 $ormed b~
~utting the upper bottom 1~ out of t~e bunged drum 42 according to Fi~. 4, with the cutting edge 30 extending on the in~id~ of th~ drum wall 18 at a distance below the level plane 48 and $urther below the upper ed~e 56 of the drum whi~h i~ formed by the fiurface of the carrying and tran~port rin~

In Fig. 6, a lidded drum body Z~ according to the invention with a drum lid 24 of hard plastic ~aterial and a teR~ion ring 26 i~ ~o~pleted to for~ an lidded drum. An annular ~eal 34- whi~h ~eal~ the dru~ lid 24 a~ainst the beveled ~ealin~ surface 60 o~ the carrying and tra~port ring 16 iG in~erted in the rim o~ the d~um lid 24. The ~aling ~u~ace 60 i8 suitably arranged next to the upper edye 56 of the drum, ~ince thi~ upper edge, e.g. in a u~e~
dru~ body, has already been subjected to 8tre~8 and may have damag~Y such a~ scratcheY or gcrapes. Thi~ e~odiment i~
~uit~ble e.g. in ~o~bination with an in-linçr ~foil bag~ ~or VifiCOU~ con~ent~-Xn Fig. 7, the lidded drum body 20 i~ provided with a dru~lid ~2 o she~t steel whi~h i~ ~ecured onto the car~yin~ and t~an~port ring 16 in a g~-tight and li~uid-tight manner by means o~ the o~erlapping ten~ion xing 26. Thi~ lidded drum vergion i5 p~x~iaularly suitable e.g. in combination with a ~ ~ .

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10 FEB '94 09:09 ~RUSER WERKE BRUEHL . P.18 :: : 211~ ~ 61 ':
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, ~ thin-walled, but sta~le, insertable container fsr `j low-viscosity contenti~.

Another embodiment with a ~elf-fa~tening i~nap-on lid 64 of pla~tic ma~erial ii~ shown in ~i~. 8. No tension ring i6 re~uired for this lid. ~he low~r edge of ~he ~nap-on lid 64 ~8 isegmented and provid~d with loaXin~ pin~ 66 which radially pro~ect inwardly and automatically engage in alo~ed poisition . .
- unde~neath the e~i~entially horizontal contact urface 48 ~f the c~r~ying and trani6port rinq ~o ais to s~cure the lid.
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A further embodi~ent wi~h a 3elf-fa~tenin~ alinch lid 68 ' made of sheet i3teel i~ 6hown in Pig. 9, with the ~lightly .~ prol~n~ed lower xLm o~ the i~heet metal lid bein~ likewise segmented. Proje~ting downwa~dl~ from the rim of the lid ~re ton~ue-i~haped ~e~ment~ 70 which after ch~r~ing the drum body 20 and attachm~nt o~ tha clinch lid 68 ar~ bent or clin~hed in~ardly underneath the rim and the horizontal contact sur~ace 48 of th~ carryin~ and transport ring 16. ~he lidded drum ver~io4s ~hown in Figs. 8 and 9 are ~uita~l~ e.g.
- ~or dry bulk mat~rial.
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., For special appli~ationi3 and to improve the isealin~
con~act pres~ure, it may be suita~le to dei~iign a -`~ circu~ferential protuboranae (isealing ca~) in form of a semicircular pro~ile 72 or trian~ular profile 74 as sealing ,~

~: 10 FEB '94 1~9:10 MRUSER WERKE BRUEHL P. 19 .. . '.
-~ ~ 211~61 `` :
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edge on the uppe:~ edge 56 o~ the drum and/or on the beveled .: sea~ing surface ~0 . This can be achieved, e . g. in an lidded` drum body made from a ~ed bu~ged drum, throu~h ~imple `~ fini~hing of ~he upper edge $6 of the drum, whereby at a ~ame ~- time possibly existing 6crape6 and ~cra~che~ are removed fro~
the ~ealing 8ur~a~e. Suoh an embodiment with ~ ~emicircular pro~ile 62 a~ ~eali~g strip o~ the carrying and transport ring 16 is shown in ~ig. 10.
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A si~ilar emkodimont with two triangular profiles 74 a~

~ealing ~txip is shown in ~ig. 13.
.,' The upper bottom 12 with conical annular sux~ace part 52 of the previou~ bunged dru~ i~ ~hown in broken lin~ in Fi~. 10, ~ith the cutting edge 30 being formed a~ a ~ertain di8tanc~ le.g. 5 to 15 m~) fro~ the inner ~ur~ace o~ the drum -. wall KO that a ~uppoxting edge 7 6 remaln~ o~ the in~ide as an ~ ~dditional lid support or lower 3upport.
.
Fi~ Xow~ a plastic lid 24 with a di~tinct aircumferential reinforcing rim 78 at the lower drum lid whi~h ~an be additicnal}y ~upported ~rom below, e.g. at increasing `' stac~ing load upon the inner support edge 7~, by the inner ~all ~ the lidded dru~ body 20. The drum lid 24 ~ ain held by a ten~ion rlng 26 in the locking position, with the ~ lid 3eal 3g being pre~ed and prefftres~ed in a ~as-tight and !i -- 16 -.' ' ~

10 FEB '94 09:11 M~uSER WERKE BRUEHL P.Z0 21155~1 .

.
liquid-tight manner again~t the ~ealin~ ~ur~a~e 60 and the ~emicircular proile 8ealin~ strip 72 on the carrying and tran~port ring.
.:
: ~he drum lid ~4 is ~upported radially by the inner w~ll of the lidded drum body and îs centered by bearing upon th~
es~entiAlly vertical contact sur~ace ~8 o the carrying and tran~port rin~ 16 and the subjac~nt area o~ the inner wall o~
!th~ drum located. Al~o this lidded drum i~ grabable and transp~ortable by a dru~ gripping tool which i~ otherwise only ~uited for conventional bunged drum~, sin~e it iu ensured that the upper dr~m g~ipper d aw can engage in the drum lid from `~;
the in~ide without imp~d~ment at lea~t up to the lev~l plane .58 of the horizontal contact ~urface 45.

shown in Fig. 12, a lidded dxum 20, which i~ le~ with a 6upporting edge 76 behind the c~tting edge during cut out o~
the uppe~ botto~ o~ th~ bunged ~rum, i8 equally ~uitable to be closed in a ~as-tight and liquid-tight manner ~fter introdu~i~g the content by a drum lid 80 which i~ welded onto the supporting edge 76 as a weld-on lid. In thi~ di~posable c~ntainer de~ign, the weld-on lid 80 has an outer diameter of the ~ame ~îze a~, or slightly ~maller ~han, the inner diameter of the drum opening a~ove the supporting ed~e 76.

As s~own in Pig~ 14, the c~ying and transport ring 15 `~ 10 FEB '94 09 11 M~USER ~ERKE BRUEHL P.21 : 2115561 `~ serves as a ~upport and sealing ~urface for the drum lid 24being pl~ced thereon with interpos~ ~ealing ring 34. Further, : the carrying and transport ring 16 ~erve~ with it~ lower, . e~entially horizontal contact ~urface 46 for the lower drum `~ gripper ~la~ 4~ of a d~u~ gripper a~ an abutment for a ten~ion ring 26 which overlap~ and hook~ on fro~ below. The upper bott~ which i8 GUt out of the for~er bunged drum and ha~ a bunghole opening 14 can advantageously be provided with a .
~eparate and previously made annular flanye 28 and i~
converted in thi~ manner to a u~able drum lid ~4, with the - co~parati~ely thin annular ~lange 28 be~ng welded or glued wi~h the upper ~otto~ (12) 24 ~ the bunged drum along the oi~oumferential wRlding zone 32 and uited with it~
~, .
i~ cro~ ectional profil~ to the upper cro~s-~ectional . conigura~ion of the carrying and transport rin~ 16. At the , inner wall ~ide of the drum, the drum lid 24, that i8 the . annular ~lange 28 is ~lightly drawn inwardly and downwardly -at lea8t until below the level plane 58 of t~e hoxizontal ".1 ~ contact ~urface of the carrying and transpo~t ~ing 16 - in . ~J
~.~ parallel rel~tio~hip to the drum wa~l. In this manner~ an s engagement groove 36 with a ~u~tantially ~ertical contact sur~aco i~ attained in the drum lid 24 for engagement ~y the up~er druw ~ripper claw of the particular drum gripp~r which i~ o~herwi~e onl~ ~uitable for bunged drumR.

In ~i~. 15, the lidded drum ~ody 20 i3 shown ~ith a 1at t . .

~:

~ 10 FEB '94 09:lZ MRUSER WERKE BRUEHL P.Z2 ~ ' ' ' ' .
2115~1 .' `.drum }id 24, In general, the u~ed d~um lid can be made e.g.
of sheet 6teel (~pproxi~nately 1. 5 tG 2 r~m thiak) c~r o~
~injection ~olded thin-walled pla6tic material (approximately

3.. 2.5 to 3 mm thick). The illuntrated pla~tic ~la~ lid 24 iK
preferably u~ed pa~ticul~rly w~en using insertable thin-walled pla~tic container~ ox ~oil bags ~in-l~ners) in the lidded drum body 20.

~,jl , .
In Fig~ 16, a drum lid 24 with engagement ~roove 36 i8 plnced on the lidded drum body charaaterized by the cutting edge 30 and is cslamped in a gaR-tight ~nd liquid-tight manner onto the sealing ~urface on top of the carrying and transport ring 16 b~ ~ean~ of the U-shaped tension ring 26. The }ower supporting dru~ ~ripper clAw 40 b~ar~ upon the lower ~3 horlzont~l ~o~tact surfaaa a~d upon the lower ~hank of the ~en~ion ring 26, while the upper drum gripper cl~ 38 engagss ¦ in the en~agemerl~ g:roove 36 of the drum lid a~d thus, in a way, ~imultaneously engages in the feed opening 22 of the ded drum body and bears upon the ~ertical contact surface.
Thu~, the drum gripper can not only ~ra~p and handle a filled lidded dru~ (e.g. with a wei~ht of 220 kg) which i~ clo~ed by a lid, but a~o an empt~, unsealed lidded dru~ bod~.

~ :.
In principle, it would also be po~ible in a bunged `~1 dru~ 42 with lower circumferential bottom rolling ring 44 - ~

-I ~h~wn in ~ig. 3 - to ¢ut out the lower drum bottom nea~ the ., -- 19 --A,, ~ .

., ,,' ' ' .

10 FEB '~4 09:12 MRUSER ~ERKE BRUEHL P. 23 --` 2 ~ 6 1 bottom ro~lln~ ring 44 for parti~ular applications and to seal the opsnin~ with a dru~ lid. In this ca~e, the upp~r bottom 12 with t~e bun~hole connection 14 of the bunged drum 42 beco~s the new lower bottom of the ~o-areated lidded drum b~dy. It i~ clear ~rom the fore~oi~ de3cription that through ~ple measuresi the ran~e of appli~ations and the pos3ibilitie3 of u~e ~or a new bunged drum which îs provided a~ ~uch only for particul~r objecti~e~, ox for a u~ed ~hermopld~tic ~unged dru~ which is only tran3ferrable for final dispo3al (e.g. burning, grinding in~o rege~e~ated ~aterial) can be con~iderably expanded. It will be under~tood that basically any o the de~ign~ o~ bunged drums aan be con~ertsd to lidded dxum bodie~ according to the invention by c~tting out the upper bottom or even by ~eparatin~ the entire drum heAd or al~o by cuttin~ exi~ting circumfexential ring~
and aompletion to a lidded drum togethcr with a mat~hing drum lid ~nd, if de~irod, ~l~o wieh ~ ten~ion ring.

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,. , j!

Claims (10)

NEW PATENT CLAIMS

1. A method of making a lidded drum body (20) of thermoplastic material for storing and transporting, in particular, hazardous liquids or solid contents, with a circumferential essentially radially projecting surface flange (16) near the upper feed opening (22) at its outer wall (18) for securing a drum lid (24) in a gas-tight and liquid-tight manner by means of an overlapping tension ring (26), characterized in that a finished bunged drum (10) of thermoplastic material with at least one bunghole opening (14) in the upper drum bottom (12) and with a carrying and transport ring (16) arranged at the upper outer rim of the bunged drum (10) serves as initial drum body, with the upper bottom (12) being cut out of this bunged drum (10) in such a way that the carrying and transport ring (16) remains at the drum opening to serve as a support for a drum lid (24) placed thereon as well as an abutment for a tension ring lock (26) attached thereto.

2. A lidded drum for storing and for transporting solid or liquid contents, with a drum body (20) that is of thermoplastic plastic, that is closeable by means of an appropriate drum lid that is installed thereon, and optionally by means of a tension ring (26) that overlaps the drum lid (24) so as to be gas-tight and liquid-tight, produced by the method defined in claim 1, characterized in that the drum body (20) is made by cutting the upper bottom (12) out of a bunged drum (10) that is ready for use and which serves as the initial product, with at least a small bunghole opening (14) in the upper drum bottom (12) and with an upper peripheral carrying and transport ring (16) (handling ring), such that a feed opening (24) that is of large diameter is formed, a prominent peripheral cutting edge (30) that is arranged on the inside of the drum body wall (18) and spaced at a distance below the upper drum edge (56) being formed, with the carrying and transport ring (16) remaining at the upper edge of the drum body (20) and optionally serving as a support for the drum lid (24) and/or optionally as a stable abutment for the tension ring (26) hooking on from underneath.

3. A lidded drum according to claim 2, characterized in that the the lidded drum body (20) is manufactured from a used bunged drum (10) that is used as the initial product after its initial use or after repeated use.

4. A lidded drum as defined in claim 2 or claim 3, characterized in that the drum body (20) can be closed by means of a drum lid (24) that consists of the upper bottom (12) that has been cut out from the bunged drum (10, 42), a suitably mating, separately prefabricated peripheral annular flange (28) being glued or welded on as a lid edge or as an upper abutment for the tension ring lock (26) that is installed.

5. A lidded drum according to claim 2, 3 or 4, characterized in that the carrying and transport ring (16) or handling ring is formed at the top of the lidded drum body (20) in an essentially massive rectangular form and is provided at the outer rim or inner rim of the upper drum edge (56) with an inwardly recessed section or bevel as a sealing surface (60).

6. A lidded drum according to claim 2, 3, 4 or 5, characterized in that a circumferential protuberance (sealing cam) in form of a semicircular profile (72) or triangular profile (74) is provided as a sealing edge on the upper edge (56) of the drum and/or on the beveled sealing surface (60).

7. A lidded drum as defined in one of the preceding claims 2 to 6, characterized in that the cutting edge (30) is spaced radially at a specific distance from the inner surface of the drum wall so that a supporting edge (46) remains on the inside as an additional lid support (lower support).

8. A lidded drum according to one of the preceding claims 2 to 7, characterized in that the drum lid (24) is fixable on the lidded drum body (20) in a gas-tight and liquid-tight manner by means of the overlapping tension ring (26).

9. A lidded drum according to one of the preceding claims 2 to 7, characterized in that the drum lid is made of plastic material and is formed as a snap-on lid (64) with a lower edge having radially inwardly projecting segmented locking pins (66).

10. A lidded drum according to one of the preceding claims 2 to 7, characterized in that the drum lid is made of sheet steel and provided in form of a clinch lid (68) with a lower rim having segmcnted tongues or segments (70) at the lid rim which are bendable underneath the carrying and transport ring (16) to secure the clinch lid (68) onto the lidded drum body (20).