AU647744B2

AU647744B2 - Bottle made of synthetic resin

Info

Publication number: AU647744B2
Application number: AU59368/90A
Authority: AU
Inventors: Akiho Ota
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 1989-07-07
Filing date: 1990-07-06
Publication date: 1994-03-31
Anticipated expiration: 2010-07-06
Also published as: CN1049005A; ES2066211T3; MY109492A; JP2524264Y2; CA2035902A1; CA2035902C; DE69014589D1; WO1991000832A1; EP0441966B1; EP0441966A4; AU5936890A; KR0172957B1; ATE114586T1; DE69014589T2; EP0441966A1; KR920701006A; CN1027057C; JPH0319848U

Abstract

A bottle made of synthetic resin is composed of a body and a stand to keep the bottle upright stably. The bottle body (1) is made of synthetic resin by biaxial stretching blow moulding, inwardly recessed at the bottom central part (6), and provided with a wide engagement groove (4) formed around the outer periphery. The stand (7) is a short cylinder nearly equal to the trunk (2) of the body (1) in outer dia. and the upper half is an engagement cylinder (9) to be engaged with the groove (4) of the bottle body (1). The lower half is a cylindrical leg (8) positioned below the lowermost end of the bottom (3) of the bottle body when engaged with the bottle.

Description

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PCT

OPI DATE 06/02/91 A0JP DATE 21/03/91 A PPLN.- I D 59368 PCT NUMBER PCT/JP9O/00867 Ti Wt TA )J fnJ i z -D V 1 C I oi z T L TZ [N jy, F, M Ng 23/00WO9/03 Al (21) MW qt PCT/JP90/00867 (22)[FM PrWL R B 19904:7,96R(O6, 07, 90) 1 BE4i i ;Z97-1/8 02 3 7U 1989 F7.A7R(07. 07. 89) JP CYOSHINO KOQYOSHO 00., LTD.)EJP/JPJ 7136 30,,MAKU3TF22t64 Tokyo, (JP) (72) AM 9 t- ;kE~f8(OTA, Ak iho CJFIJ P D T 136 X, rE3E:g3 T 02 C96 Tokyo, (JP) (74) {tMA ~)I~3$1~~rTokyo, UJP) 0BC&j~4~I') ITt~zii'),KR, LU(QrA.--), NLC')i4#~),SE(R')1l41 US.

(54) itle: BOTT'LE MADE OF SYNTHETIC RESIN (57) Abstract A bottle made of synthetic resin and composed of a body and a stand to keep the bottle upright stably. The bottle body is made of synthetic resin by biaxial stretching blow molding, inwardly recessed at the bottom central part and provided with a wide engage-4 ment groove formed around the outer periphery 1 thereof. The stand is a short cylinder nearly equal to the trunk of the body in outer diameter and the upper half thereof is an engagement cylinder to be engaged with the groove of the bottle body whereas the lower half is a cylindrical leg positioned below the lowermost end of the bottom of the bottle body when engaged with the bottle. The stand is accu- rately and easily engaged with the bottle body and enhances the impact resistance of the bottom of the bottle.

3 18 /1 (57)j 0 6 )f p)Ilctp Lt 4tIM 4 ARi tC 6 WX 7 M. I# OD JH 2 AE2-itI*L ,A #MJ~C I aDH 49(4 4TK~t6fi~tt)t 9 LlkOU .t DF*W3 #altPRM~f*09l 3 OAS ri.'K~t AT t 7' 1 ES X~1MG AU 1- 7, P ML') BB i -FR MR'.

BE GA 7v r: M i BF .vGB 4 A NL t r BG-),GR i, NO r~ BRIT 4f~ I RO L-1r CAbt3'JP El SD zy CPKP 4ll SE CG KR*~ SN 4t- CH -f 7 LI 1)L Y- SU vL~I.~ DE~J K 1 LU -7'n 7 TG I- DV: 7MC US us la The present invention relates to a synthetic resin bottle-shaped container.

Biaxially oriented blow-molded bottle-shaped containers made of acrylonitrile resin or polyethylene terephthalate resin have been previously proposed because of their mechanical strength, transparency and other excellent properties.

Such biaxially oriented blow-molded bottle-shaped containers are generally divided into two groups: those having a semispherically bulged bottom for an enhanced internal pressure resistivity and provided with a base cup that serves as a stand, and those having a bottom with an internally depressed central area which provides a base for self-standing without a base cup.

A bottle-shaped body having a self-standing capability is advantageous over a bottle-shaped body provided with a base cup in terms of easy cleaning, sterilization, molding and assembling as well as of overall appearance.

However, a self-standing bottle-shaped body has only a small bottom area that supports the bottle-shaped body relative to the cross sectional area of a body portion of the body and therefore is less stable when it stands by itself.

More specifically, when a circular peripheral portion of the bottom that serves as a stand for the bottle-shaped body is formed by depressing the central area of the bottom by blow-molding, the circular peripheral portion of the bottom is inevitably located nearer to the centre of the bottom than the outer circumference of the body portion. This fact results in the reduced bottom area that supports the bottleshaped body in an upright condition.

Moreover, when a high internal pressure is applied to such a self-standing bottle-shaped body, the bottom portion forming a stand is subjected to a relatively large expansion, which in turn adversely affects the self-standing capability of the bottle-shaped body to a significant extent. Such an expansion can result in deformation of the bottom portion.

On the other hand, in a bottle-shaped body provided with 940103,:\or\ b59368-90s 3,1 940103,p:\oper\nab,59368-9spe.003,1 2 -2a base cup for keeping it upright, the height of the base cup is required to be relatively large in order to accommodate the outwardly projecting semispherical bottom portion of the bottle-shaped body. Consequently, the overall appearance of the bottle-shaped container will be aesthetically poor because of the disproportionately large base cup. Moreover, the bottom of such a bottle-shaped body can be subject to expansion and deformation when a large internal pressure is applied thereto.

Besides, a biaxially oriented blow-molded bottle-shaped container made of acrylonitrile resin, for example, is insufficiently resistive to shocks applied to the bottom and Sthis can result in cracks and fissures on the bottom when it is inadvertently dropped.

According to one aspect of the present invention there is provided a synthetic resin bottle-shaped container comprising: a biaxially-oriented blow-molded bottle-shaped body having a curved bottom end portion, a bottom end, and a recess extending circumferentially on a curved outer peripheral surface area of the bottom end portion; and a substantially cylindrical pedestal body comprising a straight and cylindrical upper portion with an outer diameter substantially equal to that of a main body portion of said bottle-shaped body, a hollow lower portion, and a bottom end, wherein said upper pedestal portion is configured so as to closely engage with said recess as a press-fit, and wherein said hollow lower portion of the pedestal body is so configured as to accommodate the bottom end of said bottleshaped body such that the bottom end of said pedestal body extends beyond the bottom end of the bottle-shaped body.

According to a second aspect of the present invention there is provided a synthetic resin bottle-shaped container comprising: a biaxially-oriented blow-molded bottle-shaped body having a main body portion with a diameter and a curved bottom portion, said curved bottom portion having a bottom and an .940103,p:\oper\mab,59368-90spe.003,2 r -3outer peripheral outwardly convex surface extending between the bottom and main body portion forming an outwardly convex press-fit recess, said convex press-fit recess extending circumferentially around said bottom portion and longitudinally from said main body portion to an annular groove located between the bottom and the convex press-fit recess, wherein a projecting portion extends circumferentially around said concave bottom portion below said annular groove radially outwardly; and a substantially cylindrical pedestal body for supporting said bottle-shaped body comprising a straight and cylindrical upper portion with an outer diameter substantially equal to that of the main body portion, and an inner surface, said inner surface including an upper concave portion and a lower pedestal portion with a press-fit rib therebetween, said upper concave portion being shaped to abut and substantially entirely cover said convex press-fit recess, said press-fit rib engaging said annular groove and being retained therein by said projecting portion, said lower pedestal portion extending around and below said bottom portion.

The recess formed on the curved peripheral surface area of the bottle-shaped body is preferably formed such that the recess is progressively deeper towards the bottom end of the bottle-shaped body.

Since the recess of embodiments is formed such that it is progressively deeper towards the bottom end of the bottleshaped body on the curved outer peripheral surface area of the bottom portion, and the matching curved inner surface area which is formed on the inner peripheral surface of the upper portion of the cylindrical pedestal body of these embodiments is outwardly tapered toward the upper end thereof, the bottom end portion of the bottle-shaped body is closely engaged as a press fit with the pedestal body during assembly by simply I pressing downward on the bottle-shaped body until said curved outer peripheral surface area of the bottom of the bottleshaped body is completely in contact with the matching ii 940103,p:\oper\mab,59368-90se .oo3, -4peripheral surface area of the cylindrical upper portion of the pedestal body.

When the recess formed on the curved outer peripheral surface area of the bottle-shaped body is so configured that the recess is progressively deeper towards the bottom end of the bottle-shaped body, a projecting portion is provided at the lower end of the recess. This projecting portion can cooperate with a rib of preferred embodiments to produce a firmer and more stable engagement between the bottle-shaped body and the pedestal body.

With such an arrangement, since the curved outer peripheral surface of the bottom of the bottle-shaped body is closely engaged with the inner surface of the pedestal body, an increase in inner pressure is carried by the inner surface of the pedestal body, and the bottom of the bottle-shaped body is protected against any undesirable expansion and deformation due to such an increased inner pressure.

Besides, since the bottom end of the pedestal body is always positioned below the bottom end of the bottle-shaped 2 20 body, the bottom end of the pedestal body provides a firm and stable support for the bottle-shaped body regardless of expansion and deformation of its bottom.

Moreover, since the pedestal body is not integral with the bottle-shaped body and the pedestal body serves as a shock absorber that effectively protects the bottom of the bottleshaped body from cracks and fissures, the bottom of the bottle-shaped body is not subjected to substantial shocks even if the bottle-shaped container is made of acrylonitrile resin and it is dropped from a high position.

The present invention now will be described in greater detail by referring to the accompanying drawings that illustrate a preferred embodiment of the invention.

Fig. 1 is a front view of an embodiment showing a pedestal body in partial longitudinal cross section.

Fig. 2 is an enlarged longitudinal sectional view showing only the encircled area of Fig. 1.

In Figs. 1 and 2, reference numeral 1 denotes a 0 b 9940103,p:\oper\mab,59368-90spe.003,4 0 biaxially-oriented blow-molded bottle-shaped body portion made of synthetic resin and a bottom portion 3 is integrally formed at the lower end of a main body portion 2 of the bottle portion 1. The bottom portion 3 has a depressed area 6 at the centre thereof and a peripheral projecting area surrounding said depressed area can serve as a stand or support structure in a conventional hollow bottle-shaped body of the selfstanding type.

Now referring to Fig. 2, a press-fit recess 4 is formed on an outer peripheral surface area of a curved surface of the bottom portion 3 near the main body portion 2 and the recess 4 is so configured that it is inwardly tapered towards its lower end thereof. Therefore, a projecting portion 5 is formed at the lower end of the recess 4.

On the other hand, a pedestal body 7 for supporting the bottle-shaped body 1 is formed as a whole in the form of a short and straight cylinder and an upper half cylindrical portion 9 of the pedestal body 7 is provided with a curved inner surface area 10 matching the outer peripheral surface area of the recess 4. Although the pedestal body is shown in Figure 2 as inwardly tapered towards its bottom end, it is preferred for the pedestal body to be straight sided cylinder along its entire length. Since both curved surfaces have the same radius of curvature, they are closely engaged with each other in a press-fit manner when assembled. A press-fit rib 11 projects from a lower end of said curved inner surface area of the upper half cylindrical portion 9 of the pedestal body and is closely engaged with the lower edge of the recess 4 when assembled.

With such an arrangement, since a step is formed at the boundary between the press-fitted cylindrical upper half portion 9 and the lower half pedestal portion 8 of the pedestal body 7, the projecting portion 5 does not constitute an obstacle when the bottle-shaped body 1 and the pedestal body 7 are assembled.

Said press-fit rib 11 has such a cross-sectional shape that it can be resiliently deformed. The curved inner surface 940103,p:\oper\mab,59368-90spe.003,5 -6area 10 is so tapered toward the upper end thereof that it provides a guide surface for properly engaging the bottleshaped body 1 with the pedestal body 7. The press-fit rib 11 can be resiliently deformed and easily pass over the projecting portion 5 for engagement of the bottle-shaped body 1 and the pedestal body 7 when they are assembled together.

Because of the engagement between the rib 11 and the projecting portion 5, the pedestal body 7 is securely fitted to the bottom portion 3 of the bottle-shaped body 1 once they are assembled.

Said pedestal body 7 is made of a synthetic resin material which is highly resistive against shocks and therefore can provide satisfactory protection for the bottleshaped body 1 against external shocks even when the bottom portion 3 of the bottle-shaped body 1 is made of acrylonitrile resin.

Because of the construction described above, embodiments of the present invention provide the following advantages.

Firstly, since the pedestal body can be formed in the form of a short and straight cylinder having an outer diameter substantially identical with that of a main body portion of the bottle-shaped container, the bottom end of the pedestal body provides stable support for the bottle-shaped body in its upright condition.

Secondly, since the overall height of the pedestal body can be only slightly greater than that of the bottom portion having a depression at the centre thereof, the pedestal body has a sufficiently reduced height relative to that of the elongated bottle-shaped main body. Consequently, the pedestal body provides a good aesthetic impression.

Thirdly, since the pedestal body is tightly press-fitted to the outer peripheral area of the bottom portion of the bottle-shaped body, it can effectively prevent any expansion and deformation of the bottom portion occurring due to increased internal pressure. Consequently, the resistance against the inner pressure of a bottle-shaped body having a depressed central area at its bottom portion can be 940103,p:\ oper\ -ab,59368 -9spe.003,6 -7considerably increased.

Additionally, since the bottle-shaped body is closely engaged with the pedestal body by a simple press-fit operation, the two bodies can be assembled without any difficulty. Moreover, since the two bodies are conveniently and mutually guided to a proper position, they can be accurately assembled.

Finally, since the pedestal body is made of a highly 1-hl-i/ LS 4 4 *t-4 m, 4- 4 1 4 4- bC hn C 4- 4 1f

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ocIz-a oL ng sy e c res n ma a can e>m"I ec ve y protect the bottom portion of the bottle-shaped body from external impacts, and prevent the bottle-shaped body from damage when the container is dropped even if the container is made of a material having a relatively poor shock resistivity such as acrylonitrile resin.

Embodiments of the present invention seek to provide a bottle-shaped container having a pedestal as self-standing means wherein the bottom of the container has an enhanced and stable self-standing capability and which is not subject to expansion and deformation, and at the same time is highly resistive to shocks.

940103,p:\oper\mab,59368-9spe.003,7

Claims

2. A synthetic resin bottle-shaped container according to claim 1, wherein said recess formed on the curved outer peripheral surface area of the bottom portion of the bottle- shaped body is so formed that the recess is progressively deeper towards the bottom end of the bottle-shaped body.
3. A synthetic resin bottle-shaped container according to claim 1 or claim 2, wherein said recess has an outer peripheral convex surface.
4. A synthetic resin bottle-shaped container according to any of the preceding claims, wherein said pedestal body is a straight cylinder along its entire length. A synthetic resin bottle-shaped container comprising: a biaxially-oriented blow-molded bottle-shaped body having a main body portion with a diameter and a curved bottom portion, said curved bottom portion having a bottom and an outer peripheral outwardly convex surface extending between I 0 'J7 9401 03,p:\oper\mab,5968-9speti338 -9- the bottom and main body portion forming an outwardly convex press-fit recess, said convex press-fit recess extending circimferentially around said bottom portion and longitudinally from said main body portion to an annular groove located between the bottom and the convex press-fit recess, wherein a projecting portion extends circumferentially around said concave bottom portion below said annular groove radially outwardly; and a substantially cylindrical pedestal body for supporting said bottle-shaped body, comprising a straight and cylindrical upper portion with an outer diameter substantially equal to that of the main body portion, and an inner surface, said inner surface including an upper concave portion and a lower pedestal portion with a press-fit rib therebetween, said upper concave portion being shaped to abut and substantially entirely cover said convex press-fit recess, said press-fit rib engaging said annular groove and being retained therein by said projecting portion, said lower pedestal portion extending around and below said bottom portion.
6. A synthetic resin bottle-shaped container according to claim 5, wherein said inner surface further comprises an annular step extending radially outward from said inner surface towards said outer diameter of said upper portion, said annular step being located between said upper concave portion and said lower pedestal portion.
7. A synthetic resin bottle-shaped container according to claim 5 or 6, wherein said upper concave portion tapers inwardly.
8. A synthetic resin bottle-shaped container according to any one of claims 5 to 7, wherein said lower pedestal portion has a generally cylindrical interior surface.
9. A synthetic resin bottle-shaped container according to any one of claims 5 to 8, wherein said press-fit recess is 94 0103,p:\oper\kn b,59 -6-90s* 003,9 indented from said main 'body portion. A synthetic resin bottle-shaped container according to any one of claims 5 to 9, wherein the bottom forms a central depressed area indented longitudinally with respect to said bottle-shaped body.
11. A synthetic resin bottle-shaped container according to ;y one of claims 5 to 10, wherein said press-fit rib is resilient.
12. A synthetic resin bottle-shaped container substantially as hereinbefore described with reference to the drawings. DATED this 20t:h day of January, 1994 YOSHINO KOGYOSHO CO., LTD. By its Patent Attorneys: DAVIES COLLISON CAVE 94010o3,p:\oper\n ab,59368-90qe.003, ABSTRACT OF THE DISCLOSURE This invention relates to a synthetic resin bottle-shaped tcontainer comprising a bottle-shaped main body and a pedestal body for providing stable self-standing capability to the main body. The bottle-shaped main body is made of a biaxially oriented blow-molded synthetic resin material. A center portion of a bottom portion of the main body is depressed inwardly and a curved outer peripheral surface area of the bottom portion is formed to a wide press-fit recess to be engaged with a pedestal body The pedestal body is a short cylindrical portion with an outer diameter substantially equal to that of the bottle portion of the main body and comprises an upper half portion for engaging with the press- fit recess of the bottom portion and a lower half portion for accommodating the bottom portion so that the lowest end of the pedestal body is positioned below the lowest end of the bottom portion The pedestal body is easily and exactly engaged with the main body and also provides a high protection capability against external impact to the bottom portion of the main body