CA2297033A1 - Plastics bottle - Google Patents
Plastics bottle Download PDFInfo
- Publication number
- CA2297033A1 CA2297033A1 CA002297033A CA2297033A CA2297033A1 CA 2297033 A1 CA2297033 A1 CA 2297033A1 CA 002297033 A CA002297033 A CA 002297033A CA 2297033 A CA2297033 A CA 2297033A CA 2297033 A1 CA2297033 A1 CA 2297033A1
- Authority
- CA
- Canada
- Prior art keywords
- foot
- plastics bottle
- bottle according
- base
- bottle
- 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
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
- B65D1/0284—Bottom construction having a discontinuous contact surface, e.g. discrete feet
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Laminated Bodies (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Cosmetics (AREA)
Abstract
A plastics bottle (1) having a base (5) comprising circumferentially spaced feet (10) separated by valleys (20). The bottle has improved stability which makes it suitable for standing on a variety of surfaces and also maintains ease of blow moulding and good stress crack resistance. The base design combines narrow valleys, which have side walls at an angle of 25~ or less to each other, with wide feet. The foot width is at least 35 % of the circumference of the standing surface, significantly larger than the more typical 20 to 25 % of comparable prior art designs.
Description
' CA 02297033 2000-O1-20 ~ , r~ _ r ' W.0034W02 ; , - , , _' r s w v ~a s a ,~~ r ' 3 - n .7 n 7 s f s A A
f PLASTICS BOTTLE
This invention relates to a plastics bottle for S carbonated beverages which has a so-called "petaloid" or "footed" base.
The use of lightweight plastics bottles is well known for a multitude of products. Since the development of blow-moulding techniques, clear biaxially-oriented PET
bottles have become widely used for carbonated soft drinks, particularly of 1 and 2 litre capacity but also of 500 cl capacity which are sold in direct competition to canned drinks.
Originally, the base was formed in a domed shape and a separate base cup was used to provide stability to the bottle. In order to reduce the cost of using a separate cup, the base design evolved into a so-called "champagne"
base and the now popular petaloid base which typically has up to 7 feet separated by ribs.
It is known that such footed bases must meet a number of criteria which in some situations may be at odds with each other. For example, it is essential to minimise stress concentrations so as avoid failure of the base which arises when stress cracks are initiated, particularly when the bottle is filled with a carbonated beverage. On the other hand, the base must also be readily blow moulded and should be stable when filled, even when internal pressure changes due to temperature variations for example.
A~NpED St+EET
' CA 02297033_2000-O1-20 , . ~ . - - as "-a7 , '-' ." 3~Pr, O ~ ~ ., p 9 f f (.
s s f y s o r, 7 ~ . . ~ n .7 !D ~ n o ~ n ~ ~ ~ ~
f PLASTICS BOTTLE
This invention relates to a plastics bottle for S carbonated beverages which has a so-called "petaloid" or "footed" base.
The use of lightweight plastics bottles is well known for a multitude of products. Since the development of blow-moulding techniques, clear biaxially-oriented PET
bottles have become widely used for carbonated soft drinks, particularly of 1 and 2 litre capacity but also of 500 cl capacity which are sold in direct competition to canned drinks.
Originally, the base was formed in a domed shape and a separate base cup was used to provide stability to the bottle. In order to reduce the cost of using a separate cup, the base design evolved into a so-called "champagne"
base and the now popular petaloid base which typically has up to 7 feet separated by ribs.
It is known that such footed bases must meet a number of criteria which in some situations may be at odds with each other. For example, it is essential to minimise stress concentrations so as avoid failure of the base which arises when stress cracks are initiated, particularly when the bottle is filled with a carbonated beverage. On the other hand, the base must also be readily blow moulded and should be stable when filled, even when internal pressure changes due to temperature variations for example.
A~NpED St+EET
' CA 02297033_2000-O1-20 , . ~ . - - as "-a7 , '-' ." 3~Pr, O ~ ~ ., p 9 f f (.
s s f y s o r, 7 ~ . . ~ n .7 !D ~ n o ~ n ~ ~ ~ ~
US-4785949 (Krishnakumar et al) proposes a design which is said to limit stress levels by maximising the cross sectional areas of the ribs and avoiding sharp transitions between the ribs and feet. This design has a maximum of five feet separated by wide ribs.
US-5024340 (Alberghini/Sewell) is directed to the provision of a stable-based bottle having four or five feet separated from each other by hemispherical ribs.
Inner walls of the bottle feet are made in three parts with a generally perpendicular central ring segment which can flatten with internal pressure, such as arises when the bottle is filled with carbonated beverage.
Another plastics bottle for carbonated drinks is described in US-5024339 (Riemer~. This design has seven feet which the patent recommends for small bottle sizes.
Small half litre bottles may comprise plastics material which has not been fully stretched during blow moulding and is therefore not completely biaxially oriented. This patent recommends that the ribs be sufficiently wide to provide pressure resistance but narrow enough to ensure optimum stretching and biaxial orientation. A suitable compromise is said to be provided by a seven-footed base with the feet being separated by parallel sided ribs.
The present invention seeks to provide a container having a base which provides improved stability whilst still ensuring efficient and easy blow moulding of the container.
According to the present invention, there is provided a plastics bottle for carbonated drinks, the bottle including an integral base, the base comprising:
AMENDED SHEET
~ . . . ~ --'7 A , ,~ r D t ~ ~ .. ~ , ' ~ n ~ o ~ v (.
~ a a ese eor r s ,, , , .-. a v o se ee -2a-a plurality of circumferentially spaced feet separated by valleys which are substantially inverted U
shaped and have side walls which are at an angle of 25°
or less to each other;
and in which each foot has a flat pad, the radially outer edge of which is substantially arcuate, the foot pads together making up a standing surface for the bottle; and the total length of the outer edges of the foot pads is at least 35°s of the circumference of the outer edge of the standing surface.
Af~ENDED SHEET
WRi 9~ifhi(3." I'C:~'/c:,13f8/02296 The base of the bottle of the r~resenr inven~ion i~hus has relatively sharp angled valley side walls in comparison with known bottle base designs and proportionately wide feet. It should be appreciated that for assessment of stability the important part of the feet is the flat pad which will contact clle surface on which a bottle will be standing. The base of the present invention h.as peen fo~.lnd to g__ve Px~ell_e:~': stab:~l;.t~~~ taut also, :~u,~pr~_sing.l~,' giver. tree :iange Y-oot ;gad si.:e, the bar? i:; easi;_~~ m(oll~ed and ha's gr,od stress crack v~c~~J_..,.~znce.
Thn s i. ~e o f tb.(~ foot. pad,- wi 11 clea;_ ly ~; ary w rlccordincx o t:h.e ~_~~::!rbe:~ o f feet '.ls~~c ion ,~ spec~_ _=:1~- b~;nse.
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.~;rnil.ar:i.y; in order that. the bot'le mainta~.n;~ gr,;.~d st~abi=~_:i~~y a_.rrespec:tv_v~, of '~ot!:le s:i_ze; ~-hEe lnng~h o:f the E~~1!~c:~ (aciae o~: ,~ f~;: ~ gad ,sh~>>_I', d pr~'r_ej::~bl';' b~, r,e~!
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F'C'fnl.a'a9'.3~02296 _ _4-bo'~tlw of the present invention will receive a l~ref~~rin gate. i'he annuli increase initial stretching of the prefo:~m away from i is centre, tius keeping the pre form away ,prom tha mould for as lung as possible and limiting st.res:~ ;-oncemtrati~ns in the centre of the final bottle base.
1l1 one ell~lbodiment, the bottle base includes five t~~;~ : . I~: th _ ~; erlr~o~iimen'~; 'she an yl~. _Lr ~-~i-en.'~ .7f ~ fi:cw ,.
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u,~as'_: 2 '>°. For cap;: U_ ~~lU~.Nin,~, t.ze foo~~ pau i s 1~~1~~':~ded ~ ntc tYle ~1 de wai 1 cf .=.'_~a ,ndjace.n~ valley b~~ a >_-adius c,~hicll, for :~ f=ive tccved base, may :~e at least 3 mln, but is preferably at leas ~ _ Irlr .
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:. ~.'-_~',.;~1'::' rave sh=:''ves made from. sm,~.l' cxauge va_; f," w.i~:h a sp~c:~ru~ n~ ul~~ '~o ;.5 mrl on tah:ich bct=:~E?; must .~*~anci tr.,=lla~7~-: t-'_ ~ ~ r I.n r~ . .=_e -(~ ,.-E.,(' e~r,~~nc' p.r!~~~n ;.. ,-, ~ ~-;, a , e;: ~ '-, .. . l,,:w . , ,,~,1~ ~_:__(-ur ~.: i 11 hE' (.f'~;~1'11°d y~r-_t~:'. ?''n'fe~"l~j:C'.E? (' ~)~?f'' C~:'.'.341.'_~~.~-7;=', ~.:1 r.~~.. c.i-.:
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_ - ~-Figure ~ :is a developed side section through the section TV--I'T tahir_h i.s the st=anding ~:i_rcumferer,.ce .)f the bo i.Y i_.~ of f i_gur.es i. to 3 and shows the foot and va L ley pr: ) v~: __ ~ a ; and Figure 5 is a .similar profile to that of fi!Iure 4 for a prior art bottle.
Figure < shoes a bottle 1 comprising a neck 2, cyl:izdr.i.~_al. body h.avin!~ side wall. 3 and :~as~= S. The neck and c'Y~li_n,~;r.i_~~a~- s~d.e wall ar,~ typical cf kno~.~m n~'T
1~.~'~':'_~s cies:'n~.e~i f~:~r carbonate~~. .sof'~ dr-'_nks. T~:e r~.wTe1 - A a ,~a ;e: of Iris invention is shoran in more detail iu figurfe:~ 2 to 4.
A prefe.rr_ed ern:~o~?.iment of the invention which is particul'srly suitable fog= half li~re bottles compx-ises five feet '.0 havi .r..a a "peta loi_d" cc~nf i c;uYa.~-i on a;; can be C'l E:'a?:'1 ''7 ~~en 1.n f ~. r?'T~rE? ~ . 'f~'1P 'Ee~t 8.Y'e f:C~llJ_ S'')?CW a ~~''otznd thn ?~a;sP ar.d .are senaratPd, from. Pack C!~hAr by '?al.l~''Ts 20.
r:_~ ,e of. each .frsot 10 inC.l_~~deC a f)_at pad 1?. ~u.~h chat whe~. ~-he bott.e is standing upright the five pads ~..?_ vtill be in contazCt '..rith 3 shelf or ta%~le. Ths five f~ad~; thus m.a.ke '.:p a stand ~_na or supp~~ri~ surface fco:~ ~-he b~*-!~_e .
outer ednn ? 4 of each pad 1? i c a.:~cu~.te .irz ~-h,3pe so e'=.c:'~ pad. cortpT: __ s ~s a se~~ment e.f ~-.he ~~.:ppo r fi. ~': r. t~-zcr .
T~. order t-.o ens».re ~~nt=im~.zzr~ !-abil ity~,, ~-a~~ have +=nun~?. -hat ':.'-.~> . ~.;v of th.e ?.en~.~ths i f of_ the oute>: ~.rcuat.e e!!cr ~;>
''."'.C!'J.lt~ :~.ltn~a'~1;3 he at lE?8.~ ;: ~J'~ Of t~.~le Ol7tE'_1.' !~lrt'.',~.ITIfN.i:e.°).C~E' of t=he stand.inq .,-ur Face . ",'hi s is ~°ead~_?. y det er~~.:~ r cct from the standing di ameter D,_ as shourr in fiau.re 3.
F>1 thottrtlz the 5,vidth o.f t-h,= na~'.s ~-.hemsel vPs ma.v not SC'G-'rl:l :ar'!~:° W::1E?'?. C:C)Y:1T~~:1_'E'.d 5d?.tr! '~rl~~
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beirvg less t.zan 25'~. As a re: u7.t, the foot pads '.2 are mtt~r: r.lir:Ler than thE~ bases 24 0~ til:~ inverted U %=,tm~.r,~d _ ~ ,e. ~ .
~~'ne ang=~e 0 is the angle for 4he profile cf the base whic_:~ r~as',lts frolr~ a developed ( i . a .. opened oat', se(.: Lion ti~~~ou(z IV-r~T, i . ~~ . the standing ~.-i rcma:v(~ro.zc~s ~:W the bottle as shown in figurE, 3. 1'hs value o:E E3 is maint~~ined mcre c r ies:; constant radial ~_y i nwa ~ ds o f tiie sec:t..ol1 sln(au':n _L)t fiEyi._E, 4 1>>.u~ Inay open ot~n_ as at~~, va.L.i(~y ~~_.E;r~E~s .__. ,:m bo~.:tle sine wall ~ where :>'~ifiluess is r:~."~ "'~
cri ~ic_:a.~ .
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~ uG'.'_1i~ ~" ~$ c, fll.~ E-t. raGlt,.S, thf 'h'1 C:.trl Y ~ ;~ ~ c'1' i:.~ :'"'.74, t,L ],~;=. = _ 0 ~ ~,-'j t, ~~..: 1 C: Y ;_ ,~~ Iy CMG : _.
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l.? 34 %~r:C:~ ~f) ''E'~._~~](5~-~t;tjr~.?'. ~'hl.S ~~1,~?.j7? l,p ~':~~'Lr>,.i-nCl' !-'E', i-'-;'+ _ile 3~ C!~.i=:~ r,~f ,~ ~r~?sCrIl ~j (c~lO~~In 131 C~O)-'~r''d ~.'.1'1,('.~ :'_n ~-i~."l'.'.'(~ i~
~~Il..' '_ _.t'f, ~nj]'~,r~+- j-h_E? :~,LOII~E:~. 11::1'~'L~ ~_a'=!? 'i ~~_n 1,1.x.,; ~~n WO 99/0 i6~7 I~~.T/~;~9~/02296 p~ore~;s. mh-'_~; en.sn.°-es that s!~ress co~lcf~~tra.t~.ons a'. t~ze da.'n region ~:_-e keyt to a m_inimu~n. ThF~ .~onc ,izt := ~_r; rinn~.lli 34 3F serve to protect the gate r~~ion further, the bottle shown in figure 1 to 4 has five feet which is suitable for bottles of half and ogle litre capacity. However, in order to maintain the vallAy shape and wide feet which have been found t:o be essential. to the ; nver~'~ ~.on f-he number of feet mail '~e trar~.e(~.
r~C'(,nr[;' r?C( '~C7 ~)'?e bf)tt l.~? G~.13r1~t:'_''= d.nd,~nr r'3j7'' .~.~.~'~'. 'T'l",,p v<~r ~_'st: a ha?. f l itre cr'.pac:it:y rot:t~_~ c:o?~ld ~tsnceitra'~l y iza~~c~;r;' y fUllL' feet, it ma~~ re necessa.r~_y to ~.ncrc:a~-f: the number cf fetat i:o, say. sever. for lal:ger bcytlE~s , Tt will be arp:~eciate~? that t=he n~,lrrrlber of .feet i;> t=he.rel:or a no~
esse.-ltinl t'o t!~e present invention. si.nc~~ i+- m~~,' need to bt, =Ta=.-~.ce? if +~he (~rite.:~.ia wh..ch n~re have found +-c~ bP
c-.r;_t-twafor (-.(~mb.is~_n stah~.:! + ~a+~ - ~-; f q -y t.. h ea P n hl. cw..~ 3~c: and m~.ll_.1~.l:m s ress ccmcentrat~.ons a_~-e +~o h(' met '~v:en trar~'i.na the ntllnher of feet, the ancr~a.l_a~ ~~;~~c:,~t or. r, f t~a~wl1 :o.;ci- ~-~ad ~: ~_ J_ ~ a'_~c change . Fw~_° a :.' ~r~_. for r e~?
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1=:_Ve i=c>c;t:ec' kvotrl. ~ f, i.rw 1=~,ti~us k. s~-ould (~2 ~ _ .l~~r~-' 3 it~~n, :=E'_.t':: e.~:~.,1 ~;t _',_y~,:~~. :.~ l:llil. '.~I'.f:l t. . ,. ~
C',Ol(~'::(~I :_C:Ev :(~ l:E.
ll~.i~c'_E: ~.'C.-t=4~lE.E:T: ;t:c:~~~..':_aj% ixllC~ t?~a:pt'. C?f li'.U4' ~l,.t~ :_1'.C.~r c.;.!.tr'.OUgh tightE:r radii would enable al~crle a to be: mcl_eds~u anal zhert;by t:l~e ioot~ paci w~_dirl, ~:~s the rada ~_ are r_eciuc,ea the bc~:~: ~ l,c=ccl~.e:.- ~ry(_ra:as.~rgi_r° cilfv:~cu.~t to bi.o~~.
~.ttc-; st;~:i_d__,,.c; (' ~ ~rr:E~tel: L~.: cf vl:a ,.~t =le c i fi~vreC 1 . , _..~a..L .'( c~ the W v,,=i:._.~~.c~e v~ta:i_ t.:~~unc:Le;:~ Db.
~a~.r~;p:_:.
k't',T'/ B98/02296 W4 99'~?7F07 _ _8_ l'~ fire footed ?~ott.le similar to tha~~. sa:uown in figures 1 t~ 4 .and h=.~aing a half lit.rc~ capaci'y:, t~3s blow -r~~,zldea. 'ih_ ~:rit ~_~~al parameters accor~s_ng fic the present ~_nw~nt i.on w ire as Follows .coot pad eai:3th .1< 12 mm Valley angle l~ 20°
'ia~wl~:~ ~.-adia;; '~y, 2.3 c;ur.
' % v -~ 1 a ~~ v ~r i d _ : : ~,a f 4 . 7 rlzn .. !i~ '~raly~~j~ 3:~i u; Ri ~ _ 8 r m._.
~a~ld~_m~ d-a~a.~~e:_ ~;_ 49 rntn ~~Wt-ye diam~tt;r 68 mrn :'ool~ pad angle tx 23°
~'oo+:. - ,'oc :. spa;:ing F~ ~ E; . 7 9 mm From ~:::se v,J.3-.~~eiv can be seed ' _ t_lat. thE~ tota:~ ~.,~ngtl~ of ~:lE? aLt.=,-_ E:.:,'~E:.i ~.7,: ;,}?~~ LOti.~ pud~i ~5 .;'~ i~l:i. 1'Jt~~Cil ~i ~.~~e Of ~_.._ ~.~.r=_:~w~:~. .: ~ v_~:e standir:g surf,3ce (i5=~ m.~n) .
Cornpa._~~::.v; _'x~~.m~"_ ' .-~c.~~,.t,~.~ '~ ,shoc~n a f fth pac~: wr ~ ~urior art na1f_ :Litre bco:':le bas: ha,V__ng f:~vt~ fc,t:t. Comparal~~-~ p_.~amerers j~Ji_'_1~ '-.L::,yen ;~~C?'gyp i~~ ~j_r(~~.r~ 4 r'~'.t'E: '-lr~,?rt, ~' ':
VI:T-' ~ ~E?
:'.c" ~, . -.?a; :'"7'j. t' -'vr , ~ ,-y~.a:; ~.',C?,~ iJ~l it d.~'ila. ~.
:_'i:lr~ l' .:_'i-: ''he :_~~~.CC. ~:
c;.",. . :r . .'.7=v: v:uv ~c:.r '., ~'h'.).s th.e d.,.
~~;:~:- .-E-_ : =~.:~1.~;t:_~ v:~aa 'oo t spac_Ln;~ F, ~ . B and D are thlc~
r~~?.~_a.:. -.~~3-~~~~ of '-hw Flat pads r>o ~liat AB .and DE _~-~:g~l-esent half '.hn x,=; d'h of +-lue r?ad outer :~d.~es . _ is r'~e ~n;Wr a of tile '!'~.e nr;,-,r ar~: hott.le des:~rn t~l~as h~.;; ~-~c~ :~c~".n~ri.~zq Pl..'_%:~I'.1"+''?~-y F,lh~.(~~" ~°?n l-~? (~Cl".11~%~.T~:~!'7 1'~lt-y.,, .y_l'l~~,E' '~f a;h,o h(1~'1-.le ~, F ,,:;T-,.r.17.~~. , 1 WO 99107697 P~CT/GB98/02296 ~._ 'r~c +~, pack. w__c~tr:e. 1_f' 7 ,. 32 ml:~
~a.a..iE:~~ anc~l.E: ~J' 50°
~~C:..__..E~y a:c;Q__li5 dsy' <~..L.~: IC!I;1 ~ -:;c~ti v~::=-..ley r~aau:> Rf' S. 7!~: mra 't v a r.~~i r.c: d~ a:~;c~ t:ar 50.. a mrn 1:~:.~t:ti.e diar,~:~ter 68 r_un Fuc t.__f-c,oi~ a~~~c.ir_y F~' 31.55 nun T~:e i~c ~w:~ ~' E;r.r~-+',. c' the outer ec'ueof f~:e ~.:ot ~a~3s for the pr ; :~r a.r',v. ~:: ~ '1 ~: is thm:F:four~ :'~;, ~~ r,:r_ ~,,h...cr, =:.
c=~:_y .2 ~. ~'° ~: ;~ t,~~.~ c:.cu-,.'~E-r-cr.c-P of ;.tee s'~,:;n.c1? I~g su!.r_f.acE.
Win; . sc;:r~:.. ~c~:_ntly less ttw.an tl-:e 39% of example 1. ~'h~_°~E: ~.~ ~:,:~~ a:. dear differ:once betc~een i:'~e va~'_te~~
anrJ.e ~" c i :~8° ~..~_: th~.t of example i.. where 8 is only 20°.
il.c Vc,ilit~ C~.i'~E:Ii fOr tnf; bEU~tiE' CiT i;.Om~dLatiVE
e~dnt~it; i c~iE~ ~y~,ii_~..'~ Gf YriGi c.it i.ive iOUI..CE.I ba5e~. ~~'he angle b~ would typically be between 50° and %0° and the proportion of toot pad width to standing circumference would generally be between 20 and 25%.
Zhe bottles of the present invention have been found to prov.~ue e:~~,~.iieWc stabii.ia:.y urv G wide ra::=~Er o:
EI_Uv.rc._:~.ErL~a~ ~i,:.;ui._;_or:s. Futs_im~'LtccosEr, rr~~. ~~~.se~
~:.i_ibiv f',:'.1__y ~.t:CE:yC.<x~~l:: ,'."i.;ic:;p;p C~aC~: :W:;~i~~t.~:.fis:e ;:.nu i~ioc~ab~.'_; ty dS Y'E'Clt::: L' _~(;u ~~y t;t~:ulil c.r.'tllL"E:r;S ~:I:.C.t ~1.Z ~ E?C ~ .
US-5024340 (Alberghini/Sewell) is directed to the provision of a stable-based bottle having four or five feet separated from each other by hemispherical ribs.
Inner walls of the bottle feet are made in three parts with a generally perpendicular central ring segment which can flatten with internal pressure, such as arises when the bottle is filled with carbonated beverage.
Another plastics bottle for carbonated drinks is described in US-5024339 (Riemer~. This design has seven feet which the patent recommends for small bottle sizes.
Small half litre bottles may comprise plastics material which has not been fully stretched during blow moulding and is therefore not completely biaxially oriented. This patent recommends that the ribs be sufficiently wide to provide pressure resistance but narrow enough to ensure optimum stretching and biaxial orientation. A suitable compromise is said to be provided by a seven-footed base with the feet being separated by parallel sided ribs.
The present invention seeks to provide a container having a base which provides improved stability whilst still ensuring efficient and easy blow moulding of the container.
According to the present invention, there is provided a plastics bottle for carbonated drinks, the bottle including an integral base, the base comprising:
AMENDED SHEET
~ . . . ~ --'7 A , ,~ r D t ~ ~ .. ~ , ' ~ n ~ o ~ v (.
~ a a ese eor r s ,, , , .-. a v o se ee -2a-a plurality of circumferentially spaced feet separated by valleys which are substantially inverted U
shaped and have side walls which are at an angle of 25°
or less to each other;
and in which each foot has a flat pad, the radially outer edge of which is substantially arcuate, the foot pads together making up a standing surface for the bottle; and the total length of the outer edges of the foot pads is at least 35°s of the circumference of the outer edge of the standing surface.
Af~ENDED SHEET
WRi 9~ifhi(3." I'C:~'/c:,13f8/02296 The base of the bottle of the r~resenr inven~ion i~hus has relatively sharp angled valley side walls in comparison with known bottle base designs and proportionately wide feet. It should be appreciated that for assessment of stability the important part of the feet is the flat pad which will contact clle surface on which a bottle will be standing. The base of the present invention h.as peen fo~.lnd to g__ve Px~ell_e:~': stab:~l;.t~~~ taut also, :~u,~pr~_sing.l~,' giver. tree :iange Y-oot ;gad si.:e, the bar? i:; easi;_~~ m(oll~ed and ha's gr,od stress crack v~c~~J_..,.~znce.
Thn s i. ~e o f tb.(~ foot. pad,- wi 11 clea;_ ly ~; ary w rlccordincx o t:h.e ~_~~::!rbe:~ o f feet '.ls~~c ion ,~ spec~_ _=:1~- b~;nse.
T17. C:~df'r tQ I'1,31'l.t;~l:i.n ~_'a5E3 Oi jIICllICiuhlia~',1, t101J~?~'e:C, it 1.S
~).rcf_,e::~:ed. drat trho t:;ota'_ 1_enat:h W= +Yy,_E, ~":;e.- ei~crE?~i ni the fC)~t pc,~.;: '_:i ~_!nc~;i rj7.a;? 5~J"o' Qi'_ ~rl~
C:_._~y'lllll:.F';'E?j',C:E'. Jf 4,.:'~'E..'' ,~utwr. wine c:W ttl~ :itan.dirlE~ s~.~.rface.
.~;rnil.ar:i.y; in order that. the bot'le mainta~.n;~ gr,;.~d st~abi=~_:i~~y a_.rrespec:tv_v~, of '~ot!:le s:i_ze; ~-hEe lnng~h o:f the E~~1!~c:~ (aciae o~: ,~ f~;: ~ gad ,sh~>>_I', d pr~'r_ej::~bl';' b~, r,e~!
wt~e,~ f %1:).Ci ~ ~'O~j ~_ ;Ill':' 1 1 f f _ t.zEa .; id -r, o ._ r~.'~. F_ im.. _ c,nae;i -:~ -~ =~ ~ i: c~ i: a Vr7..~ .'_r~.;y .aC F.h.(~ b~'1Se Of thE? ln'..'?rtE'_(i TT.
Tn.~' Vil~_i.E?VS mu3'J be ;t~C?c3 ='__J 'W7S__-'.lfW,:<.-~. -,T-f7~7n;Y~' '.
S'_J.l~': ~a~lE-'.~11 _% ~1?IT.Il_'iy'~~"leL' ~_Cal %~;~r:l(? ~:Zc3~J1i1Q a CE?;.ltral rE?i~lon 1J~:: ~:i'i ;:!)ilj7rJ_.i'?S a'.1 ~?vtE'_rnc31 ~=,1 CQY1V?a' ';E?~~1.7r1 ~~;?j'1:.:'lxfl:~C-_~~ by 2n °.'C~~!?.".':la~_:~''~ r'.'~1'l.r'.;'1';7~ fl?'St 3?'111L~1~.::i %'nd ~a.P E?i't p:=;~.a~ .'_y C~,li~,?« '~nr~7y,,,1 :~,nTi'7.'.'.~S !1~;if',''1. f.'1~"7e)_'~' _ '',t;E~
c . _1 f~WC: n:-1 W r.,~
cn ~ ~
.._..(? c'iil(_) ~')'_~ry(~5 1.?'~.~..~, f'h_, 1-lE~.li_~ph=""1.~~;~'~
.~.~1"'~7 i'ii7 '_ ~,a ' ' ' . c nnoil~:i. to ;~i~~
.., A ~~.l. or~~ ~°_~.rmi~.c~r moLr ld ha;; ,~ ~lo!~:'_c~ c~~ > ~ c.W~_ ..' . __ rn:-~.,~yf?':1'?Ilt'.ili_=,~ 1. r?. ;i~'1~~~ t0 t ~1~? ~W)t'_. . ~n '7E?
~'l:=m%':~ i%: ':yl3t t.'.,,? ,.'F'"'.~ ". v': l -~r~,lVr, ;y ;-n~ ~_OZl .'.) '. a TD.'?' :1.C'~ (~~
~': ~'''',F?~~ a' F _~'yT~. t-~'le w~ ~~inF ~cr:
F'C'fnl.a'a9'.3~02296 _ _4-bo'~tlw of the present invention will receive a l~ref~~rin gate. i'he annuli increase initial stretching of the prefo:~m away from i is centre, tius keeping the pre form away ,prom tha mould for as lung as possible and limiting st.res:~ ;-oncemtrati~ns in the centre of the final bottle base.
1l1 one ell~lbodiment, the bottle base includes five t~~;~ : . I~: th _ ~; erlr~o~iimen'~; 'she an yl~. _Lr ~-~i-en.'~ .7f ~ fi:cw ,.
pr?(a.,. L . :'~' . ".-~:c? clilE~~_~° ~~Jl"~? C~1 t:~'1e:? ~'C,)~_;it pi3!~_i ~tl~'~t:c'.,!'7~I ;:I'. the :i(:~::,~~:i.i~_ld:~~m?. al,ci _> c~_: t~l;i)o'.:v:le; ri:al~ l:)~~ ;~'.~
u,~as'_: 2 '>°. For cap;: U_ ~~lU~.Nin,~, t.ze foo~~ pau i s 1~~1~~':~ded ~ ntc tYle ~1 de wai 1 cf .=.'_~a ,ndjace.n~ valley b~~ a >_-adius c,~hicll, for :~ f=ive tccved base, may :~e at least 3 mln, but is preferably at leas ~ _ Irlr .
- - :
i1_:1 ctd,~c.:Iau~C. m ~ tllf? T7;=~_,:fai.._ .rt_..~E~Ilii.uC?1: _~S ti lc.
t: 'il~:;
~:'.:>v;f~..:.:1._+~ ,. u31~::.J. .t:~ O ' ~l~e :~l.~t..:: L ' 1 _..
:,",i;:al:.:.E-. .tur c, I: ~L::C~:~
._~
_.~.;:v..:,~»-.;. ~._:~_r.u c:n :.~1=:;_ co":-r~:yr~~~;, ;»:~r,d.~ri~~r on ':r ewer.
~w:w.'a~:~E.a:,. ., ,-.or,~ge i.r. ciom(~st~~ :~c'.'~~.~;ew:,torw !':=
C~F~'t,: ~.__ frC)rl:i r."1:L ~W':.~ r~e.l~-?::.!~li?~=s. ~E'.t:=lyr'.'_'ot;C~,"~ .n d (~rl:_.:.iPl (~al'__rlE:'.t$
:. ~.'-_~',.;~1'::' rave sh=:''ves made from. sm,~.l' cxauge va_; f," w.i~:h a sp~c:~ru~ n~ ul~~ '~o ;.5 mrl on tah:ich bct=:~E?; must .~*~anci tr.,=lla~7~-: t-'_ ~ ~ r I.n r~ . .=_e -(~ ,.-E.,(' e~r,~~nc' p.r!~~~n ;.. ,-, ~ ~-;, a , e;: ~ '-, .. . l,,:w . , ,,~,1~ ~_:__(-ur ~.: i 11 hE' (.f'~;~1'11°d y~r-_t~:'. ?''n'fe~"l~j:C'.E? (' ~)~?f'' C~:'.'.341.'_~~.~-7;=', ~.:1 r.~~.. c.i-.:
~'i CTi7.?''<' ~ . ~.. ;>.1_dE? ~T=_E?~,I l',f c'1 1'',Ofi+'.~ (?
;3t'.'C~CI:.'E~? ii(':! '.O ~he -i ''~?e:''._C).".~
T~-!Cj'.:':e . :'~S :~. a!~'~'?erCla.t.!.~._" ~':'!.d'?~lW~i?~- V_'_et'~ QF +-hc- bottle r-. L s= ~ ., , r e-, ~
"._ .. ,__ _ _!
"7. "'',1!"C: ~ ; ~, ~ '~?'.Cj'.;"'J.(~'_l'ii~. "PCB-? nr'' +-~~.'";7': ~T?, f'tl: ~ ~. ~ ne ~.j~,.Ow.y_nrr ~, FCiO~' ar!.C'.l C:?~>,p,~?1,-lr. ~J;, 1 ~_ _ !:
_ - ~-Figure ~ :is a developed side section through the section TV--I'T tahir_h i.s the st=anding ~:i_rcumferer,.ce .)f the bo i.Y i_.~ of f i_gur.es i. to 3 and shows the foot and va L ley pr: ) v~: __ ~ a ; and Figure 5 is a .similar profile to that of fi!Iure 4 for a prior art bottle.
Figure < shoes a bottle 1 comprising a neck 2, cyl:izdr.i.~_al. body h.avin!~ side wall. 3 and :~as~= S. The neck and c'Y~li_n,~;r.i_~~a~- s~d.e wall ar,~ typical cf kno~.~m n~'T
1~.~'~':'_~s cies:'n~.e~i f~:~r carbonate~~. .sof'~ dr-'_nks. T~:e r~.wTe1 - A a ,~a ;e: of Iris invention is shoran in more detail iu figurfe:~ 2 to 4.
A prefe.rr_ed ern:~o~?.iment of the invention which is particul'srly suitable fog= half li~re bottles compx-ises five feet '.0 havi .r..a a "peta loi_d" cc~nf i c;uYa.~-i on a;; can be C'l E:'a?:'1 ''7 ~~en 1.n f ~. r?'T~rE? ~ . 'f~'1P 'Ee~t 8.Y'e f:C~llJ_ S'')?CW a ~~''otznd thn ?~a;sP ar.d .are senaratPd, from. Pack C!~hAr by '?al.l~''Ts 20.
r:_~ ,e of. each .frsot 10 inC.l_~~deC a f)_at pad 1?. ~u.~h chat whe~. ~-he bott.e is standing upright the five pads ~..?_ vtill be in contazCt '..rith 3 shelf or ta%~le. Ths five f~ad~; thus m.a.ke '.:p a stand ~_na or supp~~ri~ surface fco:~ ~-he b~*-!~_e .
outer ednn ? 4 of each pad 1? i c a.:~cu~.te .irz ~-h,3pe so e'=.c:'~ pad. cortpT: __ s ~s a se~~ment e.f ~-.he ~~.:ppo r fi. ~': r. t~-zcr .
T~. order t-.o ens».re ~~nt=im~.zzr~ !-abil ity~,, ~-a~~ have +=nun~?. -hat ':.'-.~> . ~.;v of th.e ?.en~.~ths i f of_ the oute>: ~.rcuat.e e!!cr ~;>
''."'.C!'J.lt~ :~.ltn~a'~1;3 he at lE?8.~ ;: ~J'~ Of t~.~le Ol7tE'_1.' !~lrt'.',~.ITIfN.i:e.°).C~E' of t=he stand.inq .,-ur Face . ",'hi s is ~°ead~_?. y det er~~.:~ r cct from the standing di ameter D,_ as shourr in fiau.re 3.
F>1 thottrtlz the 5,vidth o.f t-h,= na~'.s ~-.hemsel vPs ma.v not SC'G-'rl:l :ar'!~:° W::1E?'?. C:C)Y:1T~~:1_'E'.d 5d?.tr! '~rl~~
C:l_"'C'll1'lfarf?nCE? !':,-. t-~':c~
itall.'~1~1.t~ .SU.~;_~~'.~-~, .''?.°_ S'_l,~E' T,T;l~.lO ~~ 01 t~~'lA
'J ~1 ..
y ,.:
,1 ~ ~_?lc.! !=.er; i,-, .,g~« ~,~i- , ~~ , :, -_ a... El r. 4aE. ezi t-iie . . iE. 4a _._ .
WD 9~~fJ'751~'1 f~:T/G~98J02296 -YJ
beirvg less t.zan 25'~. As a re: u7.t, the foot pads '.2 are mtt~r: r.lir:Ler than thE~ bases 24 0~ til:~ inverted U %=,tm~.r,~d _ ~ ,e. ~ .
~~'ne ang=~e 0 is the angle for 4he profile cf the base whic_:~ r~as',lts frolr~ a developed ( i . a .. opened oat', se(.: Lion ti~~~ou(z IV-r~T, i . ~~ . the standing ~.-i rcma:v(~ro.zc~s ~:W the bottle as shown in figurE, 3. 1'hs value o:E E3 is maint~~ined mcre c r ies:; constant radial ~_y i nwa ~ ds o f tiie sec:t..ol1 sln(au':n _L)t fiEyi._E, 4 1>>.u~ Inay open ot~n_ as at~~, va.L.i(~y ~~_.E;r~E~s .__. ,:m bo~.:tle sine wall ~ where :>'~ifiluess is r:~."~ "'~
cri ~ic_:a.~ .
r i'h,= ~,wc?~ch o:_ ~(ot pads 12 is de~c,::.::I.in~.d i:;j c'.lc l~nlg ~:. oi~ h lE: i_r a ~ cuw'te ou°~~ r cc:g~~s, ~ . t~ . :~~ . Al t.i,~cu"h _ ., th.e ~)~~.so 2~~-_ r;f ea~_h v"lley 2J i:~ ;=t~.:-~od, b~,~ »e,:.'.:~-,:,,:,~
~ uG'.'_1i~ ~" ~$ c, fll.~ E-t. raGlt,.S, thf 'h'1 C:.trl Y ~ ;~ ~ c'1' i:.~ :'"'.74, t,L ],~;=. = _ 0 ~ ~,-'j t, ~~..: 1 C: Y ;_ ,~~ Iy CMG : _.
.'ICS ;.)'~.E'E: w,..
wt = ;.:r' ~ ,:.??.C~~ t~T'L ;_y?. lalE: -i=°O.Cllli..g ~w '=~ls:' ~rt:.:lnT:~.; :_l~;.V ~ - _._ .. . , E- ~., , t ....c_. ww.'h ~.:,'~ t:.h~ ."~o;: pad ~~L i~ i.dErall~;r betw'eerc ? and . e..~ '._lf~.E_ = _ . T<....._ , 1.
2~ ~~.'-,.E' t'O~)~ J71~~': 1.' ~ r!? j~~!~Tin.r=r1 ,_il~O -:~:E? ';T(311"%
.~.'~f:°
!'Jc~.l ~ 5 77 ~,.)_,' ~-~ 3."%?.C~lf.S ~, ln'hlCri 7~' ~'~~E:''tc.'i~ t'n :!1:'L'I'P _°c Se t~:!~ .. ~.~'~~~".T~:!~ :!:: ~~~7.' ~.-.i' OL f~l~ t;ir':~~ fW:'"' S. ._ ._,ll(.a. '~ =:_'-i:)'~~
~,r~:1 l.~r, ~:
T,.; ~f~.:rP ~ '~~Ir7';:"' ~._h.P ~:~C).'~.f 1 ~~'1T",~.~. ' (J r). . , ~
..~,o.'...".., _ t.r.r~ _ :_ j_ a ~-r:? ~-nt-,C=~. hn+.~.lc.: ~1,3s~_' ~. 'j'r!.e S~-_(:~.i.oCl ITI-T_'-_ F:c35='~;i ta).:1:E:~':. X11 %' ~-1..~)-'lt:j'?)~.4'-.'l:"'.l'~' ~~,'?~ l'"r' ~~ ~Ilr'~
t'llf~t 1_fj ~ '_n t-rE
f~t~T1'f"!'r.=. '~(? r1f f1'?.C? hn;iF? fh~~'~ ; ~~ ;~r~ E»r+-nr-~~a.l ~.,.j ~-r)r~T_P~.
nrr~trta:;_i_o~ 3:? . ,.~t:.rrnu-,ded b~,J ~:~onc3ve ;~r! y. oon~~w~ ,-.n-~a~
l.? 34 %~r:C:~ ~f) ''E'~._~~](5~-~t;tjr~.?'. ~'hl.S ~~1,~?.j7? l,p ~':~~'Lr>,.i-nCl' !-'E', i-'-;'+ _ile 3~ C!~.i=:~ r,~f ,~ ~r~?sCrIl ~j (c~lO~~In 131 C~O)-'~r''d ~.'.1'1,('.~ :'_n ~-i~."l'.'.'(~ i~
~~Il..' '_ _.t'f, ~nj]'~,r~+- j-h_E? :~,LOII~E:~. 11::1'~'L~ ~_a'=!? 'i ~~_n 1,1.x.,; ~~n WO 99/0 i6~7 I~~.T/~;~9~/02296 p~ore~;s. mh-'_~; en.sn.°-es that s!~ress co~lcf~~tra.t~.ons a'. t~ze da.'n region ~:_-e keyt to a m_inimu~n. ThF~ .~onc ,izt := ~_r; rinn~.lli 34 3F serve to protect the gate r~~ion further, the bottle shown in figure 1 to 4 has five feet which is suitable for bottles of half and ogle litre capacity. However, in order to maintain the vallAy shape and wide feet which have been found t:o be essential. to the ; nver~'~ ~.on f-he number of feet mail '~e trar~.e(~.
r~C'(,nr[;' r?C( '~C7 ~)'?e bf)tt l.~? G~.13r1~t:'_''= d.nd,~nr r'3j7'' .~.~.~'~'. 'T'l",,p v<~r ~_'st: a ha?. f l itre cr'.pac:it:y rot:t~_~ c:o?~ld ~tsnceitra'~l y iza~~c~;r;' y fUllL' feet, it ma~~ re necessa.r~_y to ~.ncrc:a~-f: the number cf fetat i:o, say. sever. for lal:ger bcytlE~s , Tt will be arp:~eciate~? that t=he n~,lrrrlber of .feet i;> t=he.rel:or a no~
esse.-ltinl t'o t!~e present invention. si.nc~~ i+- m~~,' need to bt, =Ta=.-~.ce? if +~he (~rite.:~.ia wh..ch n~re have found +-c~ bP
c-.r;_t-twafor (-.(~mb.is~_n stah~.:! + ~a+~ - ~-; f q -y t.. h ea P n hl. cw..~ 3~c: and m~.ll_.1~.l:m s ress ccmcentrat~.ons a_~-e +~o h(' met '~v:en trar~'i.na the ntllnher of feet, the ancr~a.l_a~ ~~;~~c:,~t or. r, f t~a~wl1 :o.;ci- ~-~ad ~: ~_ J_ ~ a'_~c change . Fw~_° a :.' ~r~_. for r e~?
bGa:~_'_(~, l'_tii;," i3T~C~J_t- C!. SllUlliil bL-'' e:t ~E'.u:.t ~.J°
f'vr C;:~t:illluTli S~c:~l_'_l.~l.y. Url l:.~lf: t;l:.:h~~ hdlld, iUr east' ci ~.Lt:,L;:~ng ~>
1=:_Ve i=c>c;t:ec' kvotrl. ~ f, i.rw 1=~,ti~us k. s~-ould (~2 ~ _ .l~~r~-' 3 it~~n, :=E'_.t':: e.~:~.,1 ~;t _',_y~,:~~. :.~ l:llil. '.~I'.f:l t. . ,. ~
C',Ol(~'::(~I :_C:Ev :(~ l:E.
ll~.i~c'_E: ~.'C.-t=4~lE.E:T: ;t:c:~~~..':_aj% ixllC~ t?~a:pt'. C?f li'.U4' ~l,.t~ :_1'.C.~r c.;.!.tr'.OUgh tightE:r radii would enable al~crle a to be: mcl_eds~u anal zhert;by t:l~e ioot~ paci w~_dirl, ~:~s the rada ~_ are r_eciuc,ea the bc~:~: ~ l,c=ccl~.e:.- ~ry(_ra:as.~rgi_r° cilfv:~cu.~t to bi.o~~.
~.ttc-; st;~:i_d__,,.c; (' ~ ~rr:E~tel: L~.: cf vl:a ,.~t =le c i fi~vreC 1 . , _..~a..L .'( c~ the W v,,=i:._.~~.c~e v~ta:i_ t.:~~unc:Le;:~ Db.
~a~.r~;p:_:.
k't',T'/ B98/02296 W4 99'~?7F07 _ _8_ l'~ fire footed ?~ott.le similar to tha~~. sa:uown in figures 1 t~ 4 .and h=.~aing a half lit.rc~ capaci'y:, t~3s blow -r~~,zldea. 'ih_ ~:rit ~_~~al parameters accor~s_ng fic the present ~_nw~nt i.on w ire as Follows .coot pad eai:3th .1< 12 mm Valley angle l~ 20°
'ia~wl~:~ ~.-adia;; '~y, 2.3 c;ur.
' % v -~ 1 a ~~ v ~r i d _ : : ~,a f 4 . 7 rlzn .. !i~ '~raly~~j~ 3:~i u; Ri ~ _ 8 r m._.
~a~ld~_m~ d-a~a.~~e:_ ~;_ 49 rntn ~~Wt-ye diam~tt;r 68 mrn :'ool~ pad angle tx 23°
~'oo+:. - ,'oc :. spa;:ing F~ ~ E; . 7 9 mm From ~:::se v,J.3-.~~eiv can be seed ' _ t_lat. thE~ tota:~ ~.,~ngtl~ of ~:lE? aLt.=,-_ E:.:,'~E:.i ~.7,: ;,}?~~ LOti.~ pud~i ~5 .;'~ i~l:i. 1'Jt~~Cil ~i ~.~~e Of ~_.._ ~.~.r=_:~w~:~. .: ~ v_~:e standir:g surf,3ce (i5=~ m.~n) .
Cornpa._~~::.v; _'x~~.m~"_ ' .-~c.~~,.t,~.~ '~ ,shoc~n a f fth pac~: wr ~ ~urior art na1f_ :Litre bco:':le bas: ha,V__ng f:~vt~ fc,t:t. Comparal~~-~ p_.~amerers j~Ji_'_1~ '-.L::,yen ;~~C?'gyp i~~ ~j_r(~~.r~ 4 r'~'.t'E: '-lr~,?rt, ~' ':
VI:T-' ~ ~E?
:'.c" ~, . -.?a; :'"7'j. t' -'vr , ~ ,-y~.a:; ~.',C?,~ iJ~l it d.~'ila. ~.
:_'i:lr~ l' .:_'i-: ''he :_~~~.CC. ~:
c;.",. . :r . .'.7=v: v:uv ~c:.r '., ~'h'.).s th.e d.,.
~~;:~:- .-E-_ : =~.:~1.~;t:_~ v:~aa 'oo t spac_Ln;~ F, ~ . B and D are thlc~
r~~?.~_a.:. -.~~3-~~~~ of '-hw Flat pads r>o ~liat AB .and DE _~-~:g~l-esent half '.hn x,=; d'h of +-lue r?ad outer :~d.~es . _ is r'~e ~n;Wr a of tile '!'~.e nr;,-,r ar~: hott.le des:~rn t~l~as h~.;; ~-~c~ :~c~".n~ri.~zq Pl..'_%:~I'.1"+''?~-y F,lh~.(~~" ~°?n l-~? (~Cl".11~%~.T~:~!'7 1'~lt-y.,, .y_l'l~~,E' '~f a;h,o h(1~'1-.le ~, F ,,:;T-,.r.17.~~. , 1 WO 99107697 P~CT/GB98/02296 ~._ 'r~c +~, pack. w__c~tr:e. 1_f' 7 ,. 32 ml:~
~a.a..iE:~~ anc~l.E: ~J' 50°
~~C:..__..E~y a:c;Q__li5 dsy' <~..L.~: IC!I;1 ~ -:;c~ti v~::=-..ley r~aau:> Rf' S. 7!~: mra 't v a r.~~i r.c: d~ a:~;c~ t:ar 50.. a mrn 1:~:.~t:ti.e diar,~:~ter 68 r_un Fuc t.__f-c,oi~ a~~~c.ir_y F~' 31.55 nun T~:e i~c ~w:~ ~' E;r.r~-+',. c' the outer ec'ueof f~:e ~.:ot ~a~3s for the pr ; :~r a.r',v. ~:: ~ '1 ~: is thm:F:four~ :'~;, ~~ r,:r_ ~,,h...cr, =:.
c=~:_y .2 ~. ~'° ~: ;~ t,~~.~ c:.cu-,.'~E-r-cr.c-P of ;.tee s'~,:;n.c1? I~g su!.r_f.acE.
Win; . sc;:r~:.. ~c~:_ntly less ttw.an tl-:e 39% of example 1. ~'h~_°~E: ~.~ ~:,:~~ a:. dear differ:once betc~een i:'~e va~'_te~~
anrJ.e ~" c i :~8° ~..~_: th~.t of example i.. where 8 is only 20°.
il.c Vc,ilit~ C~.i'~E:Ii fOr tnf; bEU~tiE' CiT i;.Om~dLatiVE
e~dnt~it; i c~iE~ ~y~,ii_~..'~ Gf YriGi c.it i.ive iOUI..CE.I ba5e~. ~~'he angle b~ would typically be between 50° and %0° and the proportion of toot pad width to standing circumference would generally be between 20 and 25%.
Zhe bottles of the present invention have been found to prov.~ue e:~~,~.iieWc stabii.ia:.y urv G wide ra::=~Er o:
EI_Uv.rc._:~.ErL~a~ ~i,:.;ui._;_or:s. Futs_im~'LtccosEr, rr~~. ~~~.se~
~:.i_ibiv f',:'.1__y ~.t:CE:yC.<x~~l:: ,'."i.;ic:;p;p C~aC~: :W:;~i~~t.~:.fis:e ;:.nu i~ioc~ab~.'_; ty dS Y'E'Clt::: L' _~(;u ~~y t;t~:ulil c.r.'tllL"E:r;S ~:I:.C.t ~1.Z ~ E?C ~ .
Claims (10)
1. A plastics bottle (1) for carbonated drinks, the bottle (1) including an integral base (5), the base (5) comprising:
a plurality of circumferentially spaced feet (10) separated by valleys (20) which are substantially inverted U shaped;
and in which the radially outer edge (14) of each foot is substantially arcuate, the foot pads together making up a standing surface for the bottle;
characterised in that:
the feet have side walls (22) which are at an angle (8) of 25° or less to each other;
each foot has a flat pad (12); and the total length of the outer edges of the foot pads (12) is at least 35% of the circumference of the outer edge of the standing surface.
a plurality of circumferentially spaced feet (10) separated by valleys (20) which are substantially inverted U shaped;
and in which the radially outer edge (14) of each foot is substantially arcuate, the foot pads together making up a standing surface for the bottle;
characterised in that:
the feet have side walls (22) which are at an angle (8) of 25° or less to each other;
each foot has a flat pad (12); and the total length of the outer edges of the foot pads (12) is at least 35% of the circumference of the outer edge of the standing surface.
2. A plastics bottle according to claim 1, in which the total length of the outer edges of the foot pads (12) is less than 65% of the circumference of the outer edge of the standing surface.
3. A plastics bottle according to claim 1 or claim 2, in which the length of the outer edge (14) of a foot pad (12) is between 2 and 4.25 times the width of the narrowest part of a valley (20), at the base of the inverted U.
4. A plastics bottle according to any one of claims 1 to 3, in which the valleys (20) are positioned around a hemispherical dome having a central region which comprises:
an externally convex region (32) surrounded by an externally concave first annulus (34) and an externally convex second annulus (36) which tapers into a foot (10) on one side and blends into the hemispherical valley (20) on the opposite side.
an externally convex region (32) surrounded by an externally concave first annulus (34) and an externally convex second annulus (36) which tapers into a foot (10) on one side and blends into the hemispherical valley (20) on the opposite side.
5. A plastics bottle according to any one of claims 1 to 4, in which the base includes five feet (10).
6. A plastics bottle according to claim 5, in which the angular extent of a foot pad (12) is at least 25°.
7. A plastics bottle according to claim 5 or claim 6, in which the radius between the foot pad (12) and the valley side wall (22) is at least 3 mm.
8. A plastics bottle according to claim 7, in which the radius between the foot pad (12) and the valley side wall (22) is at least 5 mm.
9. A plastics bottle according to any one of claims 1 to 8, in which the standing diameter is at least 70% of the diameter of the bottle side wall.
10. A plastics bottle according to any one of claims 1 to 9, in which the bottle has a capacity of 1 litre or less.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9716422.2 | 1997-08-05 | ||
| GBGB9716422.2A GB9716422D0 (en) | 1997-08-05 | 1997-08-05 | Plastics bottle |
| PCT/GB1998/002296 WO1999007607A1 (en) | 1997-08-05 | 1998-07-31 | Plastics bottle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2297033A1 true CA2297033A1 (en) | 1999-02-18 |
Family
ID=10816919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002297033A Abandoned CA2297033A1 (en) | 1997-08-05 | 1998-07-31 | Plastics bottle |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1001902B1 (en) |
| AT (1) | ATE226167T1 (en) |
| AU (1) | AU8552598A (en) |
| CA (1) | CA2297033A1 (en) |
| DE (1) | DE69808775D1 (en) |
| GB (1) | GB9716422D0 (en) |
| HU (1) | HUP0003466A3 (en) |
| PL (1) | PL338512A1 (en) |
| TR (1) | TR200000285T2 (en) |
| WO (1) | WO1999007607A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2883792A1 (en) * | 2005-03-30 | 2006-10-06 | Sidel Sas | Mould base for blow-moulding thermoplastic containers has ridges and cavities shaped to form between four and six radial feet of specific height |
| FR2892048B1 (en) * | 2005-10-17 | 2008-01-04 | Sidel Sas | MOLD BOTTOM FOR MOLD FOR MANUFACTURING THERMOPLASTIC CONTAINERS, AND MOLDING DEVICE EQUIPPED WITH AT LEAST ONE MOLD EQUIPPED WITH SUCH A BOTTOM. |
| DE102013103777A1 (en) * | 2013-04-15 | 2014-10-16 | Krones Ag | Plastic container |
| EP3174804B1 (en) * | 2014-08-01 | 2020-11-25 | The Coca-Cola Company | Lightweight base for carbonated beverage packaging |
| DE102021125276A1 (en) * | 2021-09-29 | 2023-03-30 | Krones Aktiengesellschaft | Plastic container with a stable bottom design |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2448480A1 (en) * | 1979-02-07 | 1980-09-05 | Solvay | HOLLOW BODY IN ORIENTED THERMOPLASTIC MATERIAL |
| US4785949A (en) | 1987-12-11 | 1988-11-22 | Continental Pet Technologies, Inc. | Base configuration for an internally pressurized container |
| US5024340A (en) * | 1990-07-23 | 1991-06-18 | Sewell Plastics, Inc. | Wide stance footed bottle |
| JP3612775B2 (en) * | 1995-03-28 | 2005-01-19 | 東洋製罐株式会社 | Heat-resistant pressure-resistant self-supporting container and manufacturing method thereof |
-
1997
- 1997-08-05 GB GBGB9716422.2A patent/GB9716422D0/en not_active Ceased
-
1998
- 1998-07-31 EP EP98936563A patent/EP1001902B1/en not_active Expired - Lifetime
- 1998-07-31 CA CA002297033A patent/CA2297033A1/en not_active Abandoned
- 1998-07-31 PL PL98338512A patent/PL338512A1/en unknown
- 1998-07-31 AT AT98936563T patent/ATE226167T1/en not_active IP Right Cessation
- 1998-07-31 DE DE69808775T patent/DE69808775D1/en not_active Expired - Lifetime
- 1998-07-31 HU HU0003466A patent/HUP0003466A3/en unknown
- 1998-07-31 TR TR2000/00285T patent/TR200000285T2/en unknown
- 1998-07-31 AU AU85525/98A patent/AU8552598A/en not_active Abandoned
- 1998-07-31 WO PCT/GB1998/002296 patent/WO1999007607A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999007607A1 (en) | 1999-02-18 |
| DE69808775D1 (en) | 2002-11-21 |
| HUP0003466A2 (en) | 2001-02-28 |
| GB9716422D0 (en) | 1997-10-08 |
| HUP0003466A3 (en) | 2001-04-28 |
| AU8552598A (en) | 1999-03-01 |
| ATE226167T1 (en) | 2002-11-15 |
| TR200000285T2 (en) | 2001-03-21 |
| EP1001902B1 (en) | 2002-10-16 |
| PL338512A1 (en) | 2000-11-06 |
| EP1001902A1 (en) | 2000-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |