GB2267881A - Base configuration of a blow-moulded container - Google Patents

Base configuration of a blow-moulded container Download PDF

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Publication number
GB2267881A
GB2267881A GB9212154A GB9212154A GB2267881A GB 2267881 A GB2267881 A GB 2267881A GB 9212154 A GB9212154 A GB 9212154A GB 9212154 A GB9212154 A GB 9212154A GB 2267881 A GB2267881 A GB 2267881A
Authority
GB
United Kingdom
Prior art keywords
base configuration
annular groove
legs
blow molded
stretched blow
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.)
Granted
Application number
GB9212154A
Other versions
GB9212154D0 (en
GB2267881B (en
Inventor
Shieh Mien Hsiung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yuan Fang Ltd
Original Assignee
Yuan Fang Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yuan Fang Ltd filed Critical Yuan Fang Ltd
Priority to GB9212154A priority Critical patent/GB2267881B/en
Publication of GB9212154D0 publication Critical patent/GB9212154D0/en
Publication of GB2267881A publication Critical patent/GB2267881A/en
Application granted granted Critical
Publication of GB2267881B publication Critical patent/GB2267881B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

A base configuration of a biaxially stretched blow-moulded PET container (100, Fig 1) includes a concave spherical portion 1 in the centre of the base, an annular groove 2 around the concave spherical portion, five legs extending radially outwardly from the annular groove, each subtending an angle of 40 - 72 degrees, and a curved rib formed between every two of the legs and subtending an angle of not more than 32 degrees. Each leg has a lower side 32, a curved outer side 34 which extends downwardly from the body of the container, an inclined inner side 31, and inclined left and right sides 33. The lower side may be horizontal or inclined. <IMAGE>

Description

TITLE: A BASE CONFIGURATION FOR BIAXIAL STRETCHED BLOW MOLDED PET CONTAINERS This invention relates to a base configuration for biaxial stretched blow molded PET containers.
There are a variety of base configurations for biaxial stretched blow molded PET containers on the market.
These include configurations, for example as described in U.S. Pat. Nows. 3,935,955 and 4,785,949. The former (see FIGS. 5 and b) comprises a central concave dome portion and a plurality of triangular foot portions. However, stress cracks or even rupture is initiated in such base configuration when the applied pressure exceeds a certain critical level. The latter (see FIGS. 7 and 8) comprises a central convex portion and five radiating legs and is characterized in that the legs and feet are generally of the same outline of ribs and legs in a base configuration having six legs and feet thereby rendering the ribs a greater width.Although this base configuration may increase the cross sectional area of the rib, it is inevitable to use concave corner to connect the leg wuth the rib thus easily resulting in cracn in the concave corner portions.
Therefore, it is an object of the present invention to provide a base configuration for biaxial stretched blow molded PET containers which may obviate and mitigate the above-mentioned drawbacks.
This invention relates to an improved base configuration for biaxial stretched blow molded PET containers.
It is the primary object of the present invention to provide a base configuration for biaxial stretched blow molded PET containers which is of high internal pressure resistance.
It is another object of the present invention to provide a base configuration for biaxial stretched blow molded PET containers which is possessed of high drop impact rsi.stnc.
It is still another object of the present invention to provide a base configuration for biaxial stretched blow molded PET containers which is of good standing stability.
It is still another object of the present invention to provide a baes configuration for biaxial stretched blow molded PET containers which is of high blow moldability and strength to resist cracking.
It is a further object of the present invention to provide a base configuration for biaxial stretched blow molded PET containers which has larger volume.
Other objects and merits and a fuller understanding of the present invention will be obtained by those having ordinary skill in the art when the following detailed description is read in conjunction with the accompanying drawings.
FIG. 1 is a front view of the present invention; FIG. 2 is a bottom view of the present invention; FIG. 3 is a sectional view taken along line B-B of FIG. l; FIG. 4 is a sectional view taken along line C-C of FIG. 2; FIG. 5 is a front view of a prior art PET container; FIG. 6 is a bottom view of FIG. 5; FIG. 7 is a front view of another prior art PET container; and FIG. 8 is a bottom view of FIG. 7.
Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
With reference to the drawings and in particular to FIG. 1 thereof, the numeral 100 denotes a plastic container 100 which is characterized in the base configuartion 200. The container 100 is made of PL;'1', such as PET, which is biaxial stretched blow molded from a prefor As shown in FIGS. 2, 3 and 4, the base configuration 200 is provided with a generally spherical surface on the center of which there is a concave spherical portion 1 designed to provide greater strength and improve the thermal stability so as to prevent the base 200 from stress cracking and increase the flexibility thereof.
Around the concave spherical portion 1 there is an annular groove 2 thereby forming a protruded circular member 11 on circumferential edge of the concave spherical portion 1 and therefore providing greater strength and preventing the base 200 from stress cracking.
Five legs 3 extend radially and outwardly from the annular groove 2, each of which comprises an inner side 31, a lower side 32, a left side 33, a right side 33, and an outer side 34. The inner side 31 is an inclined surface extending radially and outwardly with respect to the annular groove 2. The lower side 32 is a horizontal surface or an inclined surface extending radially and inwardly with respect to the annular groove 2. The left and right sides 33 are inclined surfaces. The outer surface 34 is a curved surface extending downwardly from the body of the container 100. The left side and right side 33 of each leg 3 subtend an angle of 40 degrees to 72 degrees. In this preferred embodiment, the two sides 33 subtend an angle of 72 degrees.
Between every two legs 3 there is a curved rib 4 which subtends an angle of 32 degrees - 0 degree. In this preferred embodiment an angle of 0 degree is subtended by the curved rib 4.
As shown in FIG. 2, the base configuration 200 according to the present invention is characterized in the concave spherical portion 1, the annular groove 2, the rib 4 subtending an angle of 0 degree, and the left side and right side of each leg subtending an angle of 72 degrees.
Hence, the present invention can be clearly distinguished from the prior arts as shown in FIGS. 6 and 7. Further, according to the principle of biaxial stretched blow molded technique and nurucous experiments, the present invention is possessed of higher strength than those prior arts.
Although the present invention Iias been described with a certain degree of particularity, it is understood that the present disclosure is made by way of example only and that numerous changes in the detail of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.

Claims (3)

1. A base configuration for a biaxial stretched blow molded PET container comprising: a concave spherical portion provided at central of said base configuration; an annular groove around said concave spherical portion; five legs extending radially and outwardly from said annular groove, each of said legs including an inner side, a lower side, a left side, a right side, and a outer sides and subtending an angle of 40 - 70 degrees; and a curved rib formed between every two of said legs and subtending an angle of 32 - 0 degrees.
2. The base configuration for a biaxial stretched blow molded PET container as claimed in Claim 1, wherein said inner side is an inclined surface extending radially and outwardly with respect to said annular groove, said lower side is a generally horizontal surface said left and right sides are inclined surfaces, and said outer side is a curved surface extending downwardly from body of said container.
3. The base configuration for a biaxial stretched blow molded PET container as claimed in Claim 1, wherein said lower side is an inclined surface extending upwardly and inwardly with respect to said annular groove.
GB9212154A 1992-06-09 1992-06-09 A base configuration for biaxial stretched blow molded PET container Expired - Fee Related GB2267881B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9212154A GB2267881B (en) 1992-06-09 1992-06-09 A base configuration for biaxial stretched blow molded PET container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9212154A GB2267881B (en) 1992-06-09 1992-06-09 A base configuration for biaxial stretched blow molded PET container

Publications (3)

Publication Number Publication Date
GB9212154D0 GB9212154D0 (en) 1992-07-22
GB2267881A true GB2267881A (en) 1993-12-22
GB2267881B GB2267881B (en) 1996-01-24

Family

ID=10716750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9212154A Expired - Fee Related GB2267881B (en) 1992-06-09 1992-06-09 A base configuration for biaxial stretched blow molded PET container

Country Status (1)

Country Link
GB (1) GB2267881B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284586A (en) * 1992-06-08 1995-06-14 Yuan Fang Limited Base for a PET container comprising a circular groove about a concave part-spherical centre portion
WO2008017746A2 (en) * 2006-08-08 2008-02-14 Sidel Participations Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2028758A (en) * 1978-06-16 1980-03-12 Schmalbach Lubeca A container
GB2189214A (en) * 1986-04-21 1987-10-21 Fibrenyle Ltd Blow-moulded containers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2028758A (en) * 1978-06-16 1980-03-12 Schmalbach Lubeca A container
GB2189214A (en) * 1986-04-21 1987-10-21 Fibrenyle Ltd Blow-moulded containers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284586A (en) * 1992-06-08 1995-06-14 Yuan Fang Limited Base for a PET container comprising a circular groove about a concave part-spherical centre portion
GB2284586B (en) * 1992-06-08 1997-04-23 Yuan Fang Limited Biaxial stretched blow molded PET containers
WO2008017746A2 (en) * 2006-08-08 2008-02-14 Sidel Participations Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
FR2904808A1 (en) * 2006-08-08 2008-02-15 Sidel Participations HOLLOW BODY BASE OBTAINED BY BLOWING OR STRETCH BLOWING A PREFORM IN THERMPLASTIC MATERIAL, HOLLOW BODIES CONTAINING SUCH A BOTTOM
WO2008017746A3 (en) * 2006-08-08 2008-04-17 Sidel Participations Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
CN101522532B (en) * 2006-08-08 2011-11-16 西德尔合作公司 Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom
US9302805B2 (en) 2006-08-08 2016-04-05 Sidel Participations Bottom of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, and hollow body comprising such a bottom

Also Published As

Publication number Publication date
GB9212154D0 (en) 1992-07-22
GB2267881B (en) 1996-01-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060609