CA2168224A1 - Method and device for opening cartons - Google Patents
Method and device for opening cartonsInfo
- Publication number
- CA2168224A1 CA2168224A1 CA002168224A CA2168224A CA2168224A1 CA 2168224 A1 CA2168224 A1 CA 2168224A1 CA 002168224 A CA002168224 A CA 002168224A CA 2168224 A CA2168224 A CA 2168224A CA 2168224 A1 CA2168224 A1 CA 2168224A1
- Authority
- CA
- Canada
- Prior art keywords
- ridge
- severing
- carton
- line
- wings
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0033—Unpacking of articles or materials, not otherwise provided for by cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
- B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
- B65D5/062—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps with supplemental means facilitating the opening, e.g. tear lines, tear tabs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
- B67B7/00—Hand- or power-operated devices for opening closed containers
- B67B7/30—Hand-operated cutting devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Cartons (AREA)
- Knives (AREA)
Abstract
Cartons of the type used for domestic milk supply may be more readily opened if a portion of the ridge that extends above the wings of the carton is first severed between the wings and the heat sealed closure so that the severed portion of the ridge may be folded back from above the wings or removed by a further cut across the ridge to the first line of sever. The wings are then free to be folded back and pressed inward to open the carton to form a pouring lip. A device for opening cartons comprises a thin blade (109) secured to a handle (97) and hinged within a shrouded recess in a two-part housing (101). Handles (97 and 103) act about the double action hinge (100) to move the blade (109) across the slot (105) to sever a portion of the carton ridge positioned in the slot. A tongue (not shown) holds the device in alignment with the ridge to ensure that the severing is below the sealed portion of the ridge.
Description
WO 95/03975 1 21 6 ~ 2 2 4 ~CT/GB94/01606 Metho~ and device-for open~ng cartons THEINVENllO N
The invention relates to a n~,od of opening waxed paper or ,~ i'.ics or metal foil coated paper board ca-lol,s and ths like containing liquid, semi-liquids or po~lvders that may be poured, and to a devica for Gp~l ~;nu such ca, lons. In particular, the invention prwides a hand-held or wall-mounted means for e,)al)lin~ the seal closures of milk callo"s and the like to be severed so that the carton may be readily op~ned and r~los~ but not r~sealed, as required.
BACKGROUND TO THE INVENTION
The type of paper carton used particularly for dollle3lic milk supply is well known. The form of carton is n)a,keled under the R~;cl~r~
Trade Marks "ELOPAIC', or "TETRA PAIC'. Such ca. lul ,s are sealed by illclin;"g the upper p~,lions of the side walls inward with two opposil~
fsces folded t~U.er to fonn so called "wings", and heat t~eali.)g or otherwise sealills~ the mating inte,l-al e,~l~,.,ities of the illclined po.liol~s to form a ridge. This ridge may be folded flat on the upper face of the carton, or it may be left in an ~Ipslal Idi. ~y ~ t- ~de so that the
The invention relates to a n~,od of opening waxed paper or ,~ i'.ics or metal foil coated paper board ca-lol,s and ths like containing liquid, semi-liquids or po~lvders that may be poured, and to a devica for Gp~l ~;nu such ca, lons. In particular, the invention prwides a hand-held or wall-mounted means for e,)al)lin~ the seal closures of milk callo"s and the like to be severed so that the carton may be readily op~ned and r~los~ but not r~sealed, as required.
BACKGROUND TO THE INVENTION
The type of paper carton used particularly for dollle3lic milk supply is well known. The form of carton is n)a,keled under the R~;cl~r~
Trade Marks "ELOPAIC', or "TETRA PAIC'. Such ca. lul ,s are sealed by illclin;"g the upper p~,lions of the side walls inward with two opposil~
fsces folded t~U.er to fonn so called "wings", and heat t~eali.)g or otherwise sealills~ the mating inte,l-al e,~l~,.,ities of the illclined po.liol~s to form a ridge. This ridge may be folded flat on the upper face of the carton, or it may be left in an ~Ipslal Idi. ~y ~ t- ~de so that the
2 PCT/GB94/01606 ~ 6~4 upper fac~ of the carton apped, :. "gabled". The flat top typ~s ~ ca, lo. ,s g~n6r~11y have tongues at each end of the folded ridge which are detacl,d~ly secured to the side walls of the carton to k~p the ridge in a flat folded po6ition for hanspu,latio,- and sales ~ispl-~y. r~ ted on such cs,t~s are op~ning instructions, so".~ti",eswith illustldtion~.
However, many ,.~eG~,la find the ope, .;ng instructions difficult to follow.
People who ars not particularly dextrous find their failure to open the ~-~ns vely frus~ing. The failed dtl~ ts to open the c~,lons as instructed, can cause the wings to be tom, badly buckled or othenvise m~ nt~ This is hygienically ~.nd~sirabl~ and may cause the milk or other liquid in the carton to pour badly or dribble down the o~ ~id~ of the carton.
PRIOR ART
It is known to cut the entire ridge closure from the upper face of the carton. This action enables the entire upper face of the carton to be opened but not readily clQsed It is also known to cut off part or all of one of the wings to gain Ar~2ss to the cc .~tents of the carton. Neither solution is a s~;sf~-,to~ alL~-"dti~e to the s~ est~cl instructions on th~ ca, lons.
NOVEL ASPECTS OF THE INVENTION
Th~ pr~s~lt invention r~cognis~s that the suy~sl~cl --~U-od of ope,~;,)g ca,t~,n~ would be sati~ra~10.r if the forc~ required to r_leare 2~82~
However, many ,.~eG~,la find the ope, .;ng instructions difficult to follow.
People who ars not particularly dextrous find their failure to open the ~-~ns vely frus~ing. The failed dtl~ ts to open the c~,lons as instructed, can cause the wings to be tom, badly buckled or othenvise m~ nt~ This is hygienically ~.nd~sirabl~ and may cause the milk or other liquid in the carton to pour badly or dribble down the o~ ~id~ of the carton.
PRIOR ART
It is known to cut the entire ridge closure from the upper face of the carton. This action enables the entire upper face of the carton to be opened but not readily clQsed It is also known to cut off part or all of one of the wings to gain Ar~2ss to the cc .~tents of the carton. Neither solution is a s~;sf~-,to~ alL~-"dti~e to the s~ est~cl instructions on th~ ca, lons.
NOVEL ASPECTS OF THE INVENTION
Th~ pr~s~lt invention r~cognis~s that the suy~sl~cl --~U-od of ope,~;,)g ca,t~,n~ would be sati~ra~10.r if the forc~ required to r_leare 2~82~
3 PCT/GB94/01606 the carton closure by applying a force to the wings could be signir,canlly red~oe~l The ~ se"l invention ~Acil;IAtes the open;ng of ca,lons simply and cleanly. It severs and removes a sey"~enl of the closure ridge of the carton so that the wings are no longer secured to~U,er and are free to be opene~l in acco,dance with the general instructions.
STA I trJlt~TS OF INVENTION
Acco,di.)~a to a first aspect of the pr~senl invention there is provided a ",eU,~ of opening ca,t~"s having a body ~1nthin which a pourable ",alelial is stored, and a ~nged sealed ridge closure, cor"iJ.ising the steps of: (a) sev~ring s~ tially haK of the sealed pulliull of the ridge closure from the body of carton along a first line sl~sl~ntidlly pa,~llel to the rid~e; (b) removing the seversd i~, tion of the ridge from above the wings; (c) folding the wings back through at least 90 and, (d) p, ~ssi"g the ~I,posed wings towards the ridge to open the carton.
The severed pGI tiGI I of the ridge may be removsd from above the ridge by bending or a seoo, Id severing action. The line of be"ding or se~nd savering may be inclinsd to the first line between 45 and 150.
The SeCGIld severing action may be ~:fre-~d at the same time as the severing of the ridge from the body of tiie carton.
: ~ l{ ~ ~ ~
WO 95/0397~ " PCT/GB94/01606 According to a second aspect of the invention there is provided a devio~ to rA~ te the open;. 9 ca, t~ns according to the first aspect of th~ invention, which devic~ includes a guide slot for locati,)g the ridge, a first severing means for severing a po~lio, . of the ridge closure along a first line and l,.llitiny means for li."iting the length along the first line that is sev~r~J.
The device may include a seco"J severing means for severing the ridge along a sec~(ld line l"eati"~ the first line s~ d;ally in the middle of the length of the ridge and at an angle between 45 and 1 50.
Piefer~L,ly the severing means is a thin cutting blade, aKhough it may be ~I ,ea, ing maans, ~ ,e means, or, snipping means. The ~e,i,)~ action may be achieved by the foroe a~ l,e:l between a first and a sec~, d I ,a. ~le, or by a motor, or by ~aclio, . between th~ device and the carton in line with the ridge. The device is pl~ f~ y constructed to achieve a mechanical advanta~ sufficient to enable a relaffvely w~ak foro~ to be ~ lisd to the devioe to eff~ct ths ~quired severing action.
The dsvice may include a tongue zli~,~ed with the guide slot for suppo,liny the device in the requir~d aliy",~,ent during the savering action. The tongue fits under the ridgc Iwl~cn the wings to ensure ~168224 that the blade severs the carton along the first line below the sealed portion of the ridge.
The first and s~. ~d means for severing may be f~ -ed tog~er so as to sever the ridge along the first and seo~nd lines simullaneously. The severing means may be ~ta~l.able for ræ,~ oe.nent, xl.a.~ ening or cleaning.
The device may include a secollJ guide means for ~ on the edga of the ridge ~...ote fflm the first line of severing to maintain the first line s~ sl~-ltidlly pd,~llel to the edge of the ridge. This ensures that the sealed ~o. lion of the ridge is removed to leave the wings free to b~ ~"QJ.
DESCRIPTION OF THE DRAWlNGS
The invention will now be des~ iL~.I, by way of example, with r~ference to the accor..~anying ~id91~llllllatiC dr~.~;. ,gs in which:-Figures 1 to 6 illustrate the stages of opening a carton according to theinventiu", Figure 7 shows the o,~tio--al range within which the carton closure ridge may be folded or severed;
Figures 8 and 9 illustrate blades for severing the ridge closure of the carton;
WO 9~;/03975 6 PCTIGB94/01606 ~168224 Figures 10 and 11 show a hand~ld device for opening ca, lo" using a sl .ea, i"y action;
Figure 12 illu~lales the operdtio,~ of a guide ",e"~l,er to control the dspth of severing;
Fis~ure 13 illusl,aies an alte-. ,~i~/e form of guillotine CuttQr device with a r~c~a~le tongue guida;
Figures 14 to 18 illustrate two forms of hand-held devices for running along the ridge of a carton to ~ffect the savsring;
Figures 19 and 20 illustrate a~ of a wall-mountable deYice with a rotary sevsrin~ action; and, Figures 21 to 24 show the ~Illpo~elllt part for asse..~ling a pr~fe"~;~
embodiment of the device.
SPECIFIC DESCRIPTION
The ,I-eU.od of p~ru--.,;ng the invention will now be des~iL,ed with reference to figures 1 to 7 of the drawing. Figures 1 to 7 illustrate the upper po~ liGI I of a milk carton 1 having a body ~"..ed by a 5~ t slA- ~tially square base four side walts and a sealed foided flat-top.
Opposi~ side walls 2 are fûlded inward to pe~mit the G~J~Josile side walls 3 to be inciined lc~U,er to m~et in a ridge 4 which is folded flat and held in place by tongues 5 which are secured to the side walls 2.
In such ~. tl~l ,s the sl .o, Isr side walls 2 are folded inward although in the ernbodiment shown the carton is of s~ 7l~-~ti~11y square cross s~tiun. T~e inclined t)o.lions 6 and 7 of the side walls 3 may be wo 95~03g7s ~ ~ ~ 8 ~ 2 ~ PCT/GB94/01606 .- ~ '; " ~
longer than the width of the side walls 2 so that the top of the carton form a ~abled top.
To open the carton the tongues 5 are deta~,ed from the side walls 2 and the ridge 4 is lifted in the d;.e~tion shown be the arrow 8 in figure 1. The next step in o~,en;.,g the carton is shown in figure 2. The sl~ded pulli~ll 9 of the ridge 4 is removed from above the wings by sev~ring the heat seal~d closure s~gment along lins 10 and folding or severing along the line 11. Then, as shown in figure 3, wings 12 and 13 are folded back by at least 90 onto the incline.i po, liull9 6 and 7, as ye~ldlly instructed by the opening instructions and illus~dti~lls p~ led on ths carton. The final step i8 to press inward in the dil ~t;of~
of arrows 14 and 1~ towards the ridge (as shown in figure 4). This pressurQ ~p,i.~ the wir~s 12 and 13 open in the direction of the arrow 16. The top of the carton 1 is then in an open ~osition as shown in figures 5 and 6 iHlla~dtillg the form of pouring lip 17 fol---e~l by the ope,.~d wings 12 and 13. The carton may b~ r~losed but not resealed, by pushing the pouring tip in the ~i. e~io" of the ridge.
R~r~ )u now to figure 7, the lines 10 and 11 along which the ridge 4 is severed or folbed is shown in figures 1 to 6 as c" ll ,ogo"al. However the angle between the lines 10 and 11 is not criticat and may be varied by inc~bdsing the angle by an Ad~i1iG"al angle 18. The angle the lines 10 and 11 may lie between 4~ and 150, although it is ,~"ere,d~ly limited to 60 so that the remaining part of the ridge 4 does not ~ ~ t.. '' 2 ~ ~
i,.~e,rar~ with the ope,.i.-~ of the wings 12 and 13. By s~le~ti.)g the angle 19 between the ~ines 10 and 11 tha (ellld;n;.,U part of the ridge can assist the re~losi. ~y of the carton by holding the wings 12 and 13 in a closed position.
Figures 8 and 9 show a form of cutter blade 20 co...~..isinU a se~;lion 21 for severing along the line 10 which is s~ )tially p~r~llel to the ridge 4 a s~tion 22 for severing across the height of the ridge 4 alcng tha line 11 which is ~. U .o~onal to the line 10 a se..ti~n 23 which bears on the edge of the ridge to act as a guide to iimit the length o~ the severed l~o.lio., of the ridge 4, and a badc plate 24 having a post 25 which is u ed to co~ tly locate and help to secure the cutter blade in a carton opening device. The cutting angle along the line 10 is shown by the angle 26 and the cutting angle along the line 1~ is shown on figure 8 by the angle 27. lllese an~les are set to assist the cutting action and to reduce the force rcquired to sevQr the ~.o.~ion g of the carton.
Figure 9 shows an ~Ite..,dti~e forrn of cutter blade in which the intega.
which pe~ the same function as those J~ il,ed wi~ rare-~ to figure 8 are given the same .~a~.)ce n~ ef~ls. It will ~ seen that the angles 26 and 27 in figure 8 are reversed in the all~,-,ali~e fonn of b~ade. This reversal of the angles hBlpS to maintain the ridge within the carton opening device whilst the severing is ~IT~taJ.
~ 2 2 ~
Refe"i"y now to figures 10 and 11 which shaw a hand-held device I~F jrAlly COIllpfis;lly l,ar,dles 28 and 29 joined by a link arm 30 which act against a spring 31 to close jaws 32 and 33 which pivot about a post 34. The jaw 32 has an arcuate blade cutting edge 35 which co-op~rate~ with a co"esp~,di.,g edge 36 on the jaw 33. The edges 3~
and 36 detennine the lateral line of sever of the carton along the line 10' shown on figure 10. The ",a~i",~m length of cut 37 as shown on figure 10 is cl~tell"i"ed by the length of the cutting edge 35 howevar this is set by the posilio";ng of a guide 38 which fits below the wings of the carton. The vertical line of ssver of the carton along the line 11' shown on figure 10 is determined by the edges 40 and 41. The ma~im~m length of the cut 3g is determined by the length of upstanding edges 40 and 41 on jaws 32 and 33 ,~spe~ ely. The "~ depth of the cut 39 may be set as desc.;l~ iater with el loe to figures 12.
In an ~lle" ,ati./e device (not shown) the severing blade or blades may be r~r~ ~d by a cut and pinch jaw asse"l~ly. The severing action provided by such a device is suited to a static surfac~mounted or wall-mounted device.
If th~ ridge 4 (shown in flgure 1 to 6) is to be severed across its entire height i"~lead of being folded back the depth of severing rnust extend ~rom the top edge of the ridge 4 to the root of the ridge so as to remove th~ sealed closed pu, lio, l of the ridge. This depth may be ~nt, ulled by æi~2~ ~
a guide 50 which rests on the top edge of the ridgQ 4 as shown in hgure 12. Tha l~ositioning of the carton opening devicQ is Assi~ l by the tongu~ guide 38, which holds the severing blade yd,all~l to th~
ridge so that the carton is seYered below th~ level at which the carton ridge is sealed.
Figure 13 shows a further form of device for sQvering a po. lion of the ridg~ of a carton. In particular the device incl~ ~des a f~t~a~lable guide 73 pivoted about a pin 74 so that a IQg 7~ of the guide fits under the wings of the carton and is (el~cled to clamp a guillotine ass~ bly 76 in ,~sition after it has been lo~t~ on the top of th~ ridgQ 4. This ensures that the lateral line tO is accurately aligned to saver ths carton along thc ridge lin~ of th~ carton. Tha device has a handle 77 which is moved against th~ rQtum action of a spring (not shown) to cause the cutter blade 641o~ on post 78 on the handle 77 to co op~r~le with the fixed cutt~r guillotin~ blad~ ~o s~ver the ridse 4. Tha ridge 4 is ~o~ition~d by a spring st~el pressurQ p~ate 79 mounted on a back plate 80 and the guide 73. The guide 73 has a l~per pin 81 which is de~ss~ by the initial movernent of the handle 77 causing conlacl with a ~ dl~ J rarnp 82 on th~ handl~. ThQ guid~ 73 is sprung to retum to th~ open ,~sition. Th~ pressure piate 79 bears a9-~;nal a post 78 on the cutter blad~ 64 to maintain co.ll~t pr~ssure on the cutting edge.
~ 8~ WO 95/03g75 11 PCT/GBg4/01606 It will be appr~ci-~'e~l that the severing of the ridge of the carton may be &rfiecieJ by shealil,y m6"l1~er~, snipping ",e"lber:~, guill-~ti"e ",e"l~ers or, cutting ",e"lbe,~. The device may be hand-held or mounted on a fixed s~rface such a wall or work surface.
A simple form of davice is shown in figures 14 to 18. In a first form of the device illu- lld~el.,l in figures 14 to 16 the severing is achieved by a fine cutting wheel 83 mounted at the foot of a side Jimb 84 of a U-shapecl chan"el 85. A cross ~uide 86 is secured between side limb 87 and the side limb 84. An end stop 88 ten,l;ndtes the cl)a~ 185.
~n use the cha""el 85 is pushed along the ridge of a carton. The guide 86 holds the ridge against th~ wheel 83 which severs the ridge alon~
the line 10 (shown in figure 2). The length of cut pa.f~n"e~ by the wheel 83 is limited to the line 11(shown in figure 2) by the end of the carton ridge b~alill5a against the end stop 88. The device is then wit hd~dWIl from the carton and the severed ~, liol, of the ridge folded back to free the wings for opening in the "o""al way.
As shown in figures 17 arld 18 the cutting wheel 83 and the guide 86 may ~ f~placed by a single or opl,os~i pair of blades 89 and 90 acting in co~pe,dtion with a tongue guide 38 which loG~as betw~en the wings below the ridge as des~ ibe~l with l~rere-lce to figure 10.
WO 95/03975 `' ~CT/GB94/01606 The severing action may be linear or rotary. As shown in figures 19 and 20 a w~rk surface or wali-mounted rotary device incl~des a first seYering btade 91 for a~r~lin~ the cut along the line 10 (shown in figure 2) and a sec~nd severing biade for ~ecting the cut along the line 11 (shown in figure 2). The severing blades 91 and 92 are rnounted in a housin~ 93 having a tongue 94 to locate under the gabled ridge and to limit tha length of the ridge that is severed. It will be appr~'ec/ that as the ~llu-ls are s~ slAnt;al!y square the wings project haK way into the ridg~ from both sides. Ther~for~ the ~i-..itation for s0vGring is s~ stAntially haH way slong the ridge. The blades are utat~ within the housing 93 by a wheel 95 or an el~cb ic motor. The device is mounted on a wall or s~ ~,t~ on a work surface by a bra~e~ 96.
Figures 21 to 24 show a pf~led embodiment of the invention. The carton opening device shown in its c~m.~one,~ parts in figures 21 to 24 inoltJdes means for Iffling the tidge of flat top ~,tons, a shrouded blade for safety, hinge rneans for providing a l.,ect~anical adva- It&ge to assist tne severing action, and, cleaning po.~ts to prevent a build-up of waste "Idte~ial within the shrwded cavity of the device. The device is suitabl~ for opening 3abled ~(lons and brick type ~-l~ns such as those m~. ~t~ as "COMBIBLOC" .
The device is fo.")ed as a two part pl~lics moulding with a thin surgical steel blsde secured in an Op~51`dtiO9 handle. Figure 21 shows ~ 8224 an op~,~ling handle 97 with a r~cesse~l area 98 to f~C~iYQ the thin sev~ring blade (not shown). The end of the handle 97 is p~il~l with a slot for Iming the ridg~ of flat top ca,lons. Four pivot pins 99 are moulded into an annular hinge 100 at the boss end of the handle 97.
Figures 22 and 23 show the two parts 101 and 102 of the housing which ar~ secur~d log~tl ,er about the handle 97. Figure 22 shows the upp~r part 101 of ths housing. The part 101 con~;_;s of a handle pGI lion 103 and a head ~,o- lio-, 104. The head t~GI tiOI 1 104 iS ~eC~S~
to permit un,~s~i~led p~5~? of the blade across a slot 105. The outer walls of the head po, liul ~ 104 have ports 106 and 107 to p~nnit the r~rnoval of wasto ",dl~.ial which may b~l-~ Iodged within the rec~sse~ po, lio" 104 of th~ d~vice.
Figure 23 shows the ~ope,h,n,a part of the two part housing. The oUtlinQ ShapQ iS S~ 1 St~- Itially iCJ~ ~ti~al with the part shown in figure 22, so that l~atin~ pegs on one part co o~r~te wrth cc--- s~onding blind holes in the other part to accurately position tho hv~ parts of the housing about th~ annular hinge 100. A bifurcated tongue 108 projects from the lJIl~lelaiJe of the part of the housing shown in figure 23. Th~
slot 105 is al;~--ed with the slot in the tongue so that the carton ridge may be ins~.l~ into the slot 105 with the tongue 108 I~ below the ridg~ and bchveen the wings of the carton.
A cross se~.tiondl view through an ass~"lbled device is shown in figure 24. As shown in figure 24 a blade 109 secured to the handl~ 97 moves %~6822~
about the annular hinge 100 within the ,~cess~l upper part 101 of the housmg.
In use, the tongue 108 is ~io"~ betw~en the wings of a carton and the rid~e is pushed fully into the slot 105. The lensth of the slot 105 ensures that the ridge is severed below tha sealed closur~ for hatf the width of the ridge. A force is then apl~lied~ bet~wa., the handles 97 and 103 so that the ~lade 109 ,~luyf~ssively severs the ridgs along the line 10 (shown on figure 2). At the end of th~ cut the device is withdrawn from the carton and the severed portion of the ridge is folded back to fr~ the wings 80 that the carton may be op~d by tlpply;n~ pressure to the wings (as shown in figure 4).
rl~ld~ly the device is made from a plastics acetal copolymer t~,ial available from ll~sc;l~t under trade name "HOSTAFORM".
Suit~hle blades are available hom Swann Mo- t~n Limited of S~ lJ.
It will be a~)pr~ci -'e~1 that if the two part housing is made so that it may be .I;~"~arlUed, the blade may be r~l~d when wom. As U~ d~vics p,o~/ides a sin~le cut action thero is no requirement for a r~tum spring, however, a return spring ~,-a--~e..,~nt may be readily i"co~ t~.
I~eFer,i"g to fi3ures 21 to 24 an ~d~lit;onal bi~urcated ton~ue may be provided on the upp~r part 101 of the housing to fonn a mirror image of the tongue 108 on the lower part 102. As the blade is s~ An~ially wo 95/03975 ~1 ~i 8 ~ 2 4 PCT/GB94/01606 sy",n,~l,icdlly ,~ositio"ed in the housing such a device can be used equally well by le~l Idl ~d and right-hand~cl people.
STA I trJlt~TS OF INVENTION
Acco,di.)~a to a first aspect of the pr~senl invention there is provided a ",eU,~ of opening ca,t~"s having a body ~1nthin which a pourable ",alelial is stored, and a ~nged sealed ridge closure, cor"iJ.ising the steps of: (a) sev~ring s~ tially haK of the sealed pulliull of the ridge closure from the body of carton along a first line sl~sl~ntidlly pa,~llel to the rid~e; (b) removing the seversd i~, tion of the ridge from above the wings; (c) folding the wings back through at least 90 and, (d) p, ~ssi"g the ~I,posed wings towards the ridge to open the carton.
The severed pGI tiGI I of the ridge may be removsd from above the ridge by bending or a seoo, Id severing action. The line of be"ding or se~nd savering may be inclinsd to the first line between 45 and 150.
The SeCGIld severing action may be ~:fre-~d at the same time as the severing of the ridge from the body of tiie carton.
: ~ l{ ~ ~ ~
WO 95/0397~ " PCT/GB94/01606 According to a second aspect of the invention there is provided a devio~ to rA~ te the open;. 9 ca, t~ns according to the first aspect of th~ invention, which devic~ includes a guide slot for locati,)g the ridge, a first severing means for severing a po~lio, . of the ridge closure along a first line and l,.llitiny means for li."iting the length along the first line that is sev~r~J.
The device may include a seco"J severing means for severing the ridge along a sec~(ld line l"eati"~ the first line s~ d;ally in the middle of the length of the ridge and at an angle between 45 and 1 50.
Piefer~L,ly the severing means is a thin cutting blade, aKhough it may be ~I ,ea, ing maans, ~ ,e means, or, snipping means. The ~e,i,)~ action may be achieved by the foroe a~ l,e:l between a first and a sec~, d I ,a. ~le, or by a motor, or by ~aclio, . between th~ device and the carton in line with the ridge. The device is pl~ f~ y constructed to achieve a mechanical advanta~ sufficient to enable a relaffvely w~ak foro~ to be ~ lisd to the devioe to eff~ct ths ~quired severing action.
The dsvice may include a tongue zli~,~ed with the guide slot for suppo,liny the device in the requir~d aliy",~,ent during the savering action. The tongue fits under the ridgc Iwl~cn the wings to ensure ~168224 that the blade severs the carton along the first line below the sealed portion of the ridge.
The first and s~. ~d means for severing may be f~ -ed tog~er so as to sever the ridge along the first and seo~nd lines simullaneously. The severing means may be ~ta~l.able for ræ,~ oe.nent, xl.a.~ ening or cleaning.
The device may include a secollJ guide means for ~ on the edga of the ridge ~...ote fflm the first line of severing to maintain the first line s~ sl~-ltidlly pd,~llel to the edge of the ridge. This ensures that the sealed ~o. lion of the ridge is removed to leave the wings free to b~ ~"QJ.
DESCRIPTION OF THE DRAWlNGS
The invention will now be des~ iL~.I, by way of example, with r~ference to the accor..~anying ~id91~llllllatiC dr~.~;. ,gs in which:-Figures 1 to 6 illustrate the stages of opening a carton according to theinventiu", Figure 7 shows the o,~tio--al range within which the carton closure ridge may be folded or severed;
Figures 8 and 9 illustrate blades for severing the ridge closure of the carton;
WO 9~;/03975 6 PCTIGB94/01606 ~168224 Figures 10 and 11 show a hand~ld device for opening ca, lo" using a sl .ea, i"y action;
Figure 12 illu~lales the operdtio,~ of a guide ",e"~l,er to control the dspth of severing;
Fis~ure 13 illusl,aies an alte-. ,~i~/e form of guillotine CuttQr device with a r~c~a~le tongue guida;
Figures 14 to 18 illustrate two forms of hand-held devices for running along the ridge of a carton to ~ffect the savsring;
Figures 19 and 20 illustrate a~ of a wall-mountable deYice with a rotary sevsrin~ action; and, Figures 21 to 24 show the ~Illpo~elllt part for asse..~ling a pr~fe"~;~
embodiment of the device.
SPECIFIC DESCRIPTION
The ,I-eU.od of p~ru--.,;ng the invention will now be des~iL,ed with reference to figures 1 to 7 of the drawing. Figures 1 to 7 illustrate the upper po~ liGI I of a milk carton 1 having a body ~"..ed by a 5~ t slA- ~tially square base four side walts and a sealed foided flat-top.
Opposi~ side walls 2 are fûlded inward to pe~mit the G~J~Josile side walls 3 to be inciined lc~U,er to m~et in a ridge 4 which is folded flat and held in place by tongues 5 which are secured to the side walls 2.
In such ~. tl~l ,s the sl .o, Isr side walls 2 are folded inward although in the ernbodiment shown the carton is of s~ 7l~-~ti~11y square cross s~tiun. T~e inclined t)o.lions 6 and 7 of the side walls 3 may be wo 95~03g7s ~ ~ ~ 8 ~ 2 ~ PCT/GB94/01606 .- ~ '; " ~
longer than the width of the side walls 2 so that the top of the carton form a ~abled top.
To open the carton the tongues 5 are deta~,ed from the side walls 2 and the ridge 4 is lifted in the d;.e~tion shown be the arrow 8 in figure 1. The next step in o~,en;.,g the carton is shown in figure 2. The sl~ded pulli~ll 9 of the ridge 4 is removed from above the wings by sev~ring the heat seal~d closure s~gment along lins 10 and folding or severing along the line 11. Then, as shown in figure 3, wings 12 and 13 are folded back by at least 90 onto the incline.i po, liull9 6 and 7, as ye~ldlly instructed by the opening instructions and illus~dti~lls p~ led on ths carton. The final step i8 to press inward in the dil ~t;of~
of arrows 14 and 1~ towards the ridge (as shown in figure 4). This pressurQ ~p,i.~ the wir~s 12 and 13 open in the direction of the arrow 16. The top of the carton 1 is then in an open ~osition as shown in figures 5 and 6 iHlla~dtillg the form of pouring lip 17 fol---e~l by the ope,.~d wings 12 and 13. The carton may b~ r~losed but not resealed, by pushing the pouring tip in the ~i. e~io" of the ridge.
R~r~ )u now to figure 7, the lines 10 and 11 along which the ridge 4 is severed or folbed is shown in figures 1 to 6 as c" ll ,ogo"al. However the angle between the lines 10 and 11 is not criticat and may be varied by inc~bdsing the angle by an Ad~i1iG"al angle 18. The angle the lines 10 and 11 may lie between 4~ and 150, although it is ,~"ere,d~ly limited to 60 so that the remaining part of the ridge 4 does not ~ ~ t.. '' 2 ~ ~
i,.~e,rar~ with the ope,.i.-~ of the wings 12 and 13. By s~le~ti.)g the angle 19 between the ~ines 10 and 11 tha (ellld;n;.,U part of the ridge can assist the re~losi. ~y of the carton by holding the wings 12 and 13 in a closed position.
Figures 8 and 9 show a form of cutter blade 20 co...~..isinU a se~;lion 21 for severing along the line 10 which is s~ )tially p~r~llel to the ridge 4 a s~tion 22 for severing across the height of the ridge 4 alcng tha line 11 which is ~. U .o~onal to the line 10 a se..ti~n 23 which bears on the edge of the ridge to act as a guide to iimit the length o~ the severed l~o.lio., of the ridge 4, and a badc plate 24 having a post 25 which is u ed to co~ tly locate and help to secure the cutter blade in a carton opening device. The cutting angle along the line 10 is shown by the angle 26 and the cutting angle along the line 1~ is shown on figure 8 by the angle 27. lllese an~les are set to assist the cutting action and to reduce the force rcquired to sevQr the ~.o.~ion g of the carton.
Figure 9 shows an ~Ite..,dti~e forrn of cutter blade in which the intega.
which pe~ the same function as those J~ il,ed wi~ rare-~ to figure 8 are given the same .~a~.)ce n~ ef~ls. It will ~ seen that the angles 26 and 27 in figure 8 are reversed in the all~,-,ali~e fonn of b~ade. This reversal of the angles hBlpS to maintain the ridge within the carton opening device whilst the severing is ~IT~taJ.
~ 2 2 ~
Refe"i"y now to figures 10 and 11 which shaw a hand-held device I~F jrAlly COIllpfis;lly l,ar,dles 28 and 29 joined by a link arm 30 which act against a spring 31 to close jaws 32 and 33 which pivot about a post 34. The jaw 32 has an arcuate blade cutting edge 35 which co-op~rate~ with a co"esp~,di.,g edge 36 on the jaw 33. The edges 3~
and 36 detennine the lateral line of sever of the carton along the line 10' shown on figure 10. The ",a~i",~m length of cut 37 as shown on figure 10 is cl~tell"i"ed by the length of the cutting edge 35 howevar this is set by the posilio";ng of a guide 38 which fits below the wings of the carton. The vertical line of ssver of the carton along the line 11' shown on figure 10 is determined by the edges 40 and 41. The ma~im~m length of the cut 3g is determined by the length of upstanding edges 40 and 41 on jaws 32 and 33 ,~spe~ ely. The "~ depth of the cut 39 may be set as desc.;l~ iater with el loe to figures 12.
In an ~lle" ,ati./e device (not shown) the severing blade or blades may be r~r~ ~d by a cut and pinch jaw asse"l~ly. The severing action provided by such a device is suited to a static surfac~mounted or wall-mounted device.
If th~ ridge 4 (shown in flgure 1 to 6) is to be severed across its entire height i"~lead of being folded back the depth of severing rnust extend ~rom the top edge of the ridge 4 to the root of the ridge so as to remove th~ sealed closed pu, lio, l of the ridge. This depth may be ~nt, ulled by æi~2~ ~
a guide 50 which rests on the top edge of the ridgQ 4 as shown in hgure 12. Tha l~ositioning of the carton opening devicQ is Assi~ l by the tongu~ guide 38, which holds the severing blade yd,all~l to th~
ridge so that the carton is seYered below th~ level at which the carton ridge is sealed.
Figure 13 shows a further form of device for sQvering a po. lion of the ridg~ of a carton. In particular the device incl~ ~des a f~t~a~lable guide 73 pivoted about a pin 74 so that a IQg 7~ of the guide fits under the wings of the carton and is (el~cled to clamp a guillotine ass~ bly 76 in ,~sition after it has been lo~t~ on the top of th~ ridgQ 4. This ensures that the lateral line tO is accurately aligned to saver ths carton along thc ridge lin~ of th~ carton. Tha device has a handle 77 which is moved against th~ rQtum action of a spring (not shown) to cause the cutter blade 641o~ on post 78 on the handle 77 to co op~r~le with the fixed cutt~r guillotin~ blad~ ~o s~ver the ridse 4. Tha ridge 4 is ~o~ition~d by a spring st~el pressurQ p~ate 79 mounted on a back plate 80 and the guide 73. The guide 73 has a l~per pin 81 which is de~ss~ by the initial movernent of the handle 77 causing conlacl with a ~ dl~ J rarnp 82 on th~ handl~. ThQ guid~ 73 is sprung to retum to th~ open ,~sition. Th~ pressure piate 79 bears a9-~;nal a post 78 on the cutter blad~ 64 to maintain co.ll~t pr~ssure on the cutting edge.
~ 8~ WO 95/03g75 11 PCT/GBg4/01606 It will be appr~ci-~'e~l that the severing of the ridge of the carton may be &rfiecieJ by shealil,y m6"l1~er~, snipping ",e"lber:~, guill-~ti"e ",e"l~ers or, cutting ",e"lbe,~. The device may be hand-held or mounted on a fixed s~rface such a wall or work surface.
A simple form of davice is shown in figures 14 to 18. In a first form of the device illu- lld~el.,l in figures 14 to 16 the severing is achieved by a fine cutting wheel 83 mounted at the foot of a side Jimb 84 of a U-shapecl chan"el 85. A cross ~uide 86 is secured between side limb 87 and the side limb 84. An end stop 88 ten,l;ndtes the cl)a~ 185.
~n use the cha""el 85 is pushed along the ridge of a carton. The guide 86 holds the ridge against th~ wheel 83 which severs the ridge alon~
the line 10 (shown in figure 2). The length of cut pa.f~n"e~ by the wheel 83 is limited to the line 11(shown in figure 2) by the end of the carton ridge b~alill5a against the end stop 88. The device is then wit hd~dWIl from the carton and the severed ~, liol, of the ridge folded back to free the wings for opening in the "o""al way.
As shown in figures 17 arld 18 the cutting wheel 83 and the guide 86 may ~ f~placed by a single or opl,os~i pair of blades 89 and 90 acting in co~pe,dtion with a tongue guide 38 which loG~as betw~en the wings below the ridge as des~ ibe~l with l~rere-lce to figure 10.
WO 95/03975 `' ~CT/GB94/01606 The severing action may be linear or rotary. As shown in figures 19 and 20 a w~rk surface or wali-mounted rotary device incl~des a first seYering btade 91 for a~r~lin~ the cut along the line 10 (shown in figure 2) and a sec~nd severing biade for ~ecting the cut along the line 11 (shown in figure 2). The severing blades 91 and 92 are rnounted in a housin~ 93 having a tongue 94 to locate under the gabled ridge and to limit tha length of the ridge that is severed. It will be appr~'ec/ that as the ~llu-ls are s~ slAnt;al!y square the wings project haK way into the ridg~ from both sides. Ther~for~ the ~i-..itation for s0vGring is s~ stAntially haH way slong the ridge. The blades are utat~ within the housing 93 by a wheel 95 or an el~cb ic motor. The device is mounted on a wall or s~ ~,t~ on a work surface by a bra~e~ 96.
Figures 21 to 24 show a pf~led embodiment of the invention. The carton opening device shown in its c~m.~one,~ parts in figures 21 to 24 inoltJdes means for Iffling the tidge of flat top ~,tons, a shrouded blade for safety, hinge rneans for providing a l.,ect~anical adva- It&ge to assist tne severing action, and, cleaning po.~ts to prevent a build-up of waste "Idte~ial within the shrwded cavity of the device. The device is suitabl~ for opening 3abled ~(lons and brick type ~-l~ns such as those m~. ~t~ as "COMBIBLOC" .
The device is fo.")ed as a two part pl~lics moulding with a thin surgical steel blsde secured in an Op~51`dtiO9 handle. Figure 21 shows ~ 8224 an op~,~ling handle 97 with a r~cesse~l area 98 to f~C~iYQ the thin sev~ring blade (not shown). The end of the handle 97 is p~il~l with a slot for Iming the ridg~ of flat top ca,lons. Four pivot pins 99 are moulded into an annular hinge 100 at the boss end of the handle 97.
Figures 22 and 23 show the two parts 101 and 102 of the housing which ar~ secur~d log~tl ,er about the handle 97. Figure 22 shows the upp~r part 101 of ths housing. The part 101 con~;_;s of a handle pGI lion 103 and a head ~,o- lio-, 104. The head t~GI tiOI 1 104 iS ~eC~S~
to permit un,~s~i~led p~5~? of the blade across a slot 105. The outer walls of the head po, liul ~ 104 have ports 106 and 107 to p~nnit the r~rnoval of wasto ",dl~.ial which may b~l-~ Iodged within the rec~sse~ po, lio" 104 of th~ d~vice.
Figure 23 shows the ~ope,h,n,a part of the two part housing. The oUtlinQ ShapQ iS S~ 1 St~- Itially iCJ~ ~ti~al with the part shown in figure 22, so that l~atin~ pegs on one part co o~r~te wrth cc--- s~onding blind holes in the other part to accurately position tho hv~ parts of the housing about th~ annular hinge 100. A bifurcated tongue 108 projects from the lJIl~lelaiJe of the part of the housing shown in figure 23. Th~
slot 105 is al;~--ed with the slot in the tongue so that the carton ridge may be ins~.l~ into the slot 105 with the tongue 108 I~ below the ridg~ and bchveen the wings of the carton.
A cross se~.tiondl view through an ass~"lbled device is shown in figure 24. As shown in figure 24 a blade 109 secured to the handl~ 97 moves %~6822~
about the annular hinge 100 within the ,~cess~l upper part 101 of the housmg.
In use, the tongue 108 is ~io"~ betw~en the wings of a carton and the rid~e is pushed fully into the slot 105. The lensth of the slot 105 ensures that the ridge is severed below tha sealed closur~ for hatf the width of the ridge. A force is then apl~lied~ bet~wa., the handles 97 and 103 so that the ~lade 109 ,~luyf~ssively severs the ridgs along the line 10 (shown on figure 2). At the end of th~ cut the device is withdrawn from the carton and the severed portion of the ridge is folded back to fr~ the wings 80 that the carton may be op~d by tlpply;n~ pressure to the wings (as shown in figure 4).
rl~ld~ly the device is made from a plastics acetal copolymer t~,ial available from ll~sc;l~t under trade name "HOSTAFORM".
Suit~hle blades are available hom Swann Mo- t~n Limited of S~ lJ.
It will be a~)pr~ci -'e~1 that if the two part housing is made so that it may be .I;~"~arlUed, the blade may be r~l~d when wom. As U~ d~vics p,o~/ides a sin~le cut action thero is no requirement for a r~tum spring, however, a return spring ~,-a--~e..,~nt may be readily i"co~ t~.
I~eFer,i"g to fi3ures 21 to 24 an ~d~lit;onal bi~urcated ton~ue may be provided on the upp~r part 101 of the housing to fonn a mirror image of the tongue 108 on the lower part 102. As the blade is s~ An~ially wo 95/03975 ~1 ~i 8 ~ 2 4 PCT/GB94/01606 sy",n,~l,icdlly ,~ositio"ed in the housing such a device can be used equally well by le~l Idl ~d and right-hand~cl people.
Claims (15)
1. A method of opening cartons having a body within which a pourable material is stored, and a winged sealed ridge closure, comprising the steps of: (a) severing substantially half of the sealed portion of the ridge closure from the body of carton along a first line substantially parallel to the ridge; (b) removing the severed portion of the ridge from above the wings; (c) folding the wings back through at least 90° and, (d) pressing the opposed wings towards the ridge to open the carton.
2. A method as claimed in claim 1 in which the severed portion of the ridge is removed from above the ridge by bending.
3. A method as claimed in claim 1 in which the severed portion of the ridge is removed by a second severing action.
4. A method as claimed in any preceding claim in which the line of bending or second severing is inclined to the first line between 45° and 150°.
5. A carton opening device to facilitate the opening cartons according to the method as claimed in any preceding claim, which device includes a guide slot for locating the ridge, a first severing means for severing a portion of the ridge closure along a first line and limiting means for limiting the length along the first line that is severed.
6. A device as claimed in claim 5 including a second severing means for severing the ridge along a second line meeting the first line substantially in the middle of the length of the ridge and at an angle between 45° and 150°.
7. A device as claimed in claim 5 or claim 6 in which the severing means is a thin cutting blade.
8. A device as claimed in claim 5 in which the first severing means is shearing means, guillotine means, or, snipping means.
9. A device as claimed in any of claims 5 to 8 which includes a tongue aligned with the guide slot for supporting the device in the required alignment during the severing action.
10. A device as claimed in any of claims 5 to 9 in which the severing is performed by a profiled blade to reduce the force required.
18
12. A device as claimed in any of claims 5 to 11 which includes a second guide means for bearing on the edge of the ridge remote from the first line of severing to maintain the first line substantially parallel to the edge of the ridge.
13. A device as claimed in any of claims 5 to 12 including two guide tongues symmetrically on opposite sides of the device.
14. A device as claimed in any of claims 5 to 13 which is driven by a motor.
15. A device substantially as described with reference to any of the embodiments shown in figures 9 to 24.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9315556.2 | 1993-07-28 | ||
| GB939315556A GB9315556D0 (en) | 1993-07-28 | 1993-07-28 | Carton opening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2168224A1 true CA2168224A1 (en) | 1995-02-09 |
Family
ID=10739524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002168224A Abandoned CA2168224A1 (en) | 1993-07-28 | 1994-07-26 | Method and device for opening cartons |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0711237B1 (en) |
| AU (1) | AU7232994A (en) |
| CA (1) | CA2168224A1 (en) |
| DE (1) | DE69417038T2 (en) |
| ES (1) | ES2129132T3 (en) |
| GB (2) | GB9315556D0 (en) |
| WO (1) | WO1995003975A1 (en) |
| ZA (1) | ZA945596B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9522738D0 (en) * | 1995-11-07 | 1996-01-10 | Ireland William A | Improvements in or relating to knives |
| ES2154202B1 (en) * | 1998-12-23 | 2001-10-16 | De La Infanta Enrique Garcia | OPENING-CLOSING ACCESSORY FOR BRIK TYPE CONTAINERS. |
| WO2002064329A1 (en) * | 2001-02-15 | 2002-08-22 | Corner Cutters Ltd. | Hand-held cutting device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH446093A (en) * | 1965-03-15 | 1967-10-31 | Roger Bajulaz S A | Device for opening a package in the form of a tetrahedron |
| US3803713A (en) * | 1971-11-26 | 1974-04-16 | J Lemmon | Carton opening cutter |
| US4291461A (en) * | 1979-08-24 | 1981-09-29 | Val Hansen | Knife guide device for opening of milk and soft drink paper cartons |
| FR2557553B1 (en) * | 1983-12-30 | 1986-12-12 | Beuzart Gilles | OPEN-CLOSING HANDLING DEVICE AND WATERPROOF PRESERVATION OF LIQUID PRODUCT CONTAINED IN NON-RIGID PACKAGING |
-
1993
- 1993-07-28 GB GB939315556A patent/GB9315556D0/en active Pending
-
1994
- 1994-07-26 DE DE69417038T patent/DE69417038T2/en not_active Expired - Fee Related
- 1994-07-26 WO PCT/GB1994/001606 patent/WO1995003975A1/en active IP Right Grant
- 1994-07-26 GB GB9601641A patent/GB2295136B/en not_active Expired - Fee Related
- 1994-07-26 AU AU72329/94A patent/AU7232994A/en not_active Abandoned
- 1994-07-26 CA CA002168224A patent/CA2168224A1/en not_active Abandoned
- 1994-07-26 EP EP94921725A patent/EP0711237B1/en not_active Expired - Lifetime
- 1994-07-26 ES ES94921725T patent/ES2129132T3/en not_active Expired - Lifetime
- 1994-07-28 ZA ZA945596A patent/ZA945596B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2129132T3 (en) | 1999-06-01 |
| EP0711237A1 (en) | 1996-05-15 |
| GB2295136B (en) | 1997-04-30 |
| DE69417038T2 (en) | 1999-10-07 |
| AU7232994A (en) | 1995-02-28 |
| WO1995003975A1 (en) | 1995-02-09 |
| ZA945596B (en) | 1995-05-25 |
| GB2295136A (en) | 1996-05-22 |
| GB9601641D0 (en) | 1996-03-27 |
| EP0711237B1 (en) | 1999-03-10 |
| DE69417038D1 (en) | 1999-04-15 |
| GB9315556D0 (en) | 1993-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |