EP0423406B1 - Blow-moulded bottle-shaped container made of synthetic resin - Google Patents

Blow-moulded bottle-shaped container made of synthetic resin Download PDF

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Publication number
EP0423406B1
EP0423406B1 EP89310710A EP89310710A EP0423406B1 EP 0423406 B1 EP0423406 B1 EP 0423406B1 EP 89310710 A EP89310710 A EP 89310710A EP 89310710 A EP89310710 A EP 89310710A EP 0423406 B1 EP0423406 B1 EP 0423406B1
Authority
EP
European Patent Office
Prior art keywords
container
blow
circumferential
bottle
shaped container
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.)
Expired - Lifetime
Application number
EP89310710A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0423406A1 (en
Inventor
Yoshiaki Hayashi
Akiho Ota
Hiroaki Sugiura
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.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co 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
Priority to CN89107811.8A priority Critical patent/CN1022900C/zh
Priority to AU42930/89A priority patent/AU635900B2/en
Priority to DE68916429T priority patent/DE68916429T2/de
Priority to CA002000959A priority patent/CA2000959C/en
Priority to AT89310710T priority patent/ATE107593T1/de
Application filed by Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to ES89310710T priority patent/ES2055091T3/es
Priority to EP89310710A priority patent/EP0423406B1/en
Publication of EP0423406A1 publication Critical patent/EP0423406A1/en
Application granted granted Critical
Publication of EP0423406B1 publication Critical patent/EP0423406B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • 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
    • 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
    • B65D2501/00—Containers having bodies formed in one piece
    • B65D2501/0009—Bottles or similar containers with necks or like restricted apertures designed for pouring contents
    • B65D2501/0018—Ribs
    • B65D2501/0036—Hollow circonferential ribs

Definitions

  • the present invention relates to a biaxially blow-molded bottle-shaped container made of synthetic resin, and more particularly, to a construction of portions of the bottle which contact with each other when bottle-shaped containers in accordance with the invention are stood upright so as to be adjacent to each other.
  • Biaxially blow-molded bottle-shaped containers made of synthetic resin such as polyethylene terephthalate resin are each filled with contents, sealed by a cap, applied with a label and packed in a corrugated card-board box by a packer for transportation.
  • blow-molded bottle-shaped containers are relatively large. Accordingly, their whole weight, filled with contents, is very heavy.
  • the quantity of synthetic resin material required to mold a bottle-shaped container be made as small as possible to form a bottle-shaped container at less cost. Accordingly, the blow-molded bottle-shaped container is molded by sufficiently orienting a parison and ensuring that the wall thickness of a body of the bottle-shaped container which forms a main portion of a content-receiving portion is very thin.
  • blow-molded bottle-shaped container Since the blow-molded bottle-shaped container is heavy when it is filled with a content liquid, if the container is slidably moved, even on a smooth plane, a considerable sliding resistance occurs. Since the wall thickness of the body which forms a main portion of a bottle-shaped container is thin, when a strong lateral load is applied to the body it becomes easily depressed and deformed. Since the uprightness of the bottle-shaped container is not good, when a number of blow-molded bottle-shaped containers are arranged to be adjacent to each other in an upright attitude, portions of the body contacted with the adjacent blow-molded bottle-shaped containers are not constant.
  • the sliding resistance produced between the conveying surface and the blow-molded bottle-shaped container is high.
  • a great lateral load acts on the body contacted with the adjacent blow-molded bottle-shaped container.
  • the central portion of the body is not always sufficient in mechanical strength with respect to the lateral load.
  • a diameter of a lower portion contacted with a leg is made sufficiently larger than other portions of the body so that, when the blow-molded bottle-shaped containers are arranged to be adjacent to each other, the lower end portions of the bodies make contact with each other. Since the lower end of the body having a large diameter is close to the leg, the lower end of the body has relatively high mechanical strength. The lower end of the body receives a lateral load exerted when a plurality of bottle-shaped containers are slidably conveyed.
  • the lower end of the body is made to have a large diameter, and the blow-molded bottle-shaped containers stood upright and arranged to be adjacent to each other are made to contact with each other at their lower ends of the bodies, whereby a number of blow-molded bottle-shaped containers can be slidably conveyed in an upright and stabilized attitude.
  • many blow-molded bottle-shaped containers have been subjected to processing such as filling with liquids per unit time. Therefore, the lateral load acting on the lower end of the body when the containers are upright and adjacent to each other and are pressed and slidably conveyed becomes more powerful. Accordingly, the mechanical durability of the lower end of the body with respect to the lateral load needs to be increased.
  • the simplest countermeasure to the aforesaid demand is to sufficiently increase the wall thickness of the lower end of the body.
  • the quantity of an expensive synthetic resin material required to mold a blow-molded bottle-shaped container increases by that increased portion, resulting in an increase in price of the blow-molded bottle-shaped container. Therefore, this countermeasure is not desirable.
  • the countermeasure considered to be the most effective in the prior art and which fulfills the aforesaid demand is to control a wall thickness of the container when a blow-molded bottle-shaped container is biaxially blow-molded so that the wall thickness of the lower end of the body is made greater than the wall thickness of other body portions.
  • This conventional means is intended to increase the wall thickness of the lower end of the body to thereby increase the mechanical strength of the lower portion of the body.
  • the conventional means can obtain an effect of increasing the mechanical strength of the lower portion of the body.
  • the wall thickness of the other portions of the body is to be reduced by a portion having increased wall thickness of the lower portion of the body.
  • a principal aim of the present invention is to considerably increase the mechanical strength with respect to a lateral load at a lower portion of a body of a container without reducing the wall thickness of other portions of the body and without increasing the amount of synthetic resin material required to mold a bottle-shaped container.
  • the present invention starts from GB-A- 1 074 162 by providing a biaxially blow-molded bottle-shaped container made of synthetic resin having a body and a leg of the body, the container including a circumferential rib in the lower end of the body, the circumferential rib having the largest diameter of the container.
  • a container differs from this prior art by having the features set forth in the characterising portion of claim 1.
  • a circumferential recessed groove having a small groove width (a sufficiently smaller groove width than a longitudinal width of a circumferential rib) is interposed between circumferential ribs so that two or more circumferential ribs are disposed in parallel. Accordingly, the circumferential ribs of adjacent containers make contact with each other so that the blow-molded bottle-shaped containers can stand upright adjacent to each other.
  • a pressing force for pressure-conveyance acting on an upstream blow-molded bottle-shaped container to adjacent blow-molded bottle-shaped containers during slidable conveyance of blow-molded bottle-shaped containers directly acts on the circumferential ribs.
  • the circumferential ribs adapted to directly receive the pressing force from the adjacent blow-molded bottle-shaped container are designed to have upper and lower rib walls in the form of tapered walls, rib walls act as reinforcing ribs. Accordingly, the pressing force exerted from the adjacent blow-molded bottle-shaped container is received with sufficient mechanical strength to considerably increase the mechanical durability with respect to the lateral load of the whole lower end of the body.
  • the circumferentially-recessed groove positioned between the circumferential ribs prevents a circumferential rib of a blow-molded bottle-shaped container from being moved onto a circumferential rib of the adjacent blow-molded bottle-shaped container to greatly incline the other blow-molded bottle-shaped container during conveyance.
  • Fig. 1 shows a bottle-shaped container 1 provided with a single circumferential rib. This is outside the scope of the present invention.
  • the biaxially blow-molded polyethylene terephthalate bottle-shaped container 1 has a volume of approximately 1 to 1.5 liters.
  • the container 1 includes a body 2 and a leg 7. Longitudinally extending absorbing panel walls 3 are circumferentially provided in parallel in a tubular wall portion from a center to a lower portion of the body 2. Reduced pressure is produced within the container 1 when said container 1 is cooled after the container is filled with a content liquid, sealed and heated to a high temperature at approximately 85 °C. The reduced pressure is absorbed by depression and deformation of the absorbing panel wall 3. A diameter of a lower end 4 of the body is largest in the container.
  • the wall thickness of the body 2 including the lower end 4 is uniformly 0.4 mm without applying wall-thickness adjusting means thereto.
  • Fig. 2 shows a contour line in a partly enlarged longitudinal section of the above-described container in which a single circumferential rib 5 is circumferentially provided in the lower end 4 of the body.
  • the circumferential rib 5 has rib walls 5a on both upper and lower end walls in the form of a tapered tubular wall.
  • the broken line indicates a contour line of prior art.
  • the circumferential rib 5 is not formed as a part of a curved surface smoothly continuous to the outer circumferential surface of the lower end 4 of the body as in the prior art.
  • the largest diameter portion is left as the circumferential rib 5, and the diameter of portions of the lower end 4 other than the circumferential rib 5 is reduced.
  • the reason why the circumferential rib 5 is formed by leaving the largest diameter portion of the lower end 4 of the body in the prior art is to prevent the diameter of the lower portion 4 of the body from being increased more than as needed by the provision of the circumferential rib 5.
  • the reason why the height of the circumferential rib 5 is relatively large is because the pressed adjacent containers 1 is always placed in contact with each other at the circumferential ribs 5 even if the upright attitude is slightly inclined.
  • Fig. 3 shows the improvement of the present invention in which two circumferential ribs 5 are provided in parallel.
  • the height of each circumferential rib 5 is smaller than that of the circumferential rib 5 shown in Fig. 2.
  • the sum of the height of both the circumferential ribs 5 is larger than the height of the circumferential rib in Fig. 2.
  • the test for lateral load was conducted with respect to the container shown in Fig. 3 under the same conditions as noted above.
  • the distortion of the lower end 4 of the body in a radial direction was 1.09 to 1.12 mm, and the distortion can be further considerably reduced. Moreover, the occurrence of the buckling deformation can be completely eliminated.
  • the wall thickness of the lower end 4 controlled by the wall thickness controlling means was 0.55 mm, which is larger by 0.15 mm than that of the container 1 according to the present invention.
  • the distortion of the lower end of the body in a radial direction was 1.13 mm, and thus the container exhibits an excellent durability.
  • the wall thickness of the body 2 other than the lower end 4 is small, the function of the whole container was deteriorated.
  • a biaxially blow-molded bottle-shaped container 1 made of synthetic resin include an upper end of a body 2 which is an upper end of the main portion of the body and a lower end 4 of a body connecting with a leg 7 of the body.
  • the diameter of the upper end of the body is equal to that of the lower end of the body.
  • Both the upper and lower ends of the body are circumferentially provided with the circumferential ribs 5, respectively.
  • two circumferential ribs 5 are provided on both the upper and lower portions of the body 2. Accordingly, the pressing force for conveyance acting on a container from an adjacent container is divided into upper and lower portions. Because of this, a lateral load acting on a single circumferential rib is reduced by half, and therefore, the mechanical durability with respect to high lateral load on the whole container is exhibited.
  • Circumferential ribs 5 having the largest diameter are positioned at both upper and lower ends of the main portion of the body 2. Accordingly, when containers are pressed and placed so as to be adjacent to each other, the containers are pressed and make contact with each other at both upper and lower circumferential ribs. Portions of the body other than the circumferential ribs which are weak with respect to the lateral load are positively prevented from being directly pressed, so that those portions are neither depressed nor deformed. In other words, adjacent containers are pressed and make contact with each other at both the upper and lower circumferential ribs. Accordingly, even if there is a container which is poor in uprightness, the container is supported at four points by adjacent containers, and therefore, the upright attitude of each container during pressing and slidable conveyance can be held at a stabilized constant state.
  • the bottle-shaped container shown in Fig.4 has a diameter at an upper end 8 of the body 2 which is the largest in the container and which is equal to a diameter of the lower end 4 of the body 2.
  • Two circumferential ribs 5 are provided in parallel as shown in Fig. 3 on the lower end 4 of the body of the container shown in Fig. 4.
  • Two circumferential ribs 5 are provided in parallel on the upper end 8 of the body of the container shown in Fig. 4.
  • the height of each circumferential rib 5 is smaller than that of the circumferential rib 5 shown in Fig. 2. However, the sum of the height of both the circumferential ribs 5 are larger than that of that circumferential rib 5.
  • the lateral load test was conducted under the same conditions as noted above with respect to the previously-described container.
  • the distortion of the lower end 4 of the body in a radial direction was 0.54 to 0.56 mm.
  • the distortion can be further considerably reduced and the occurrence of buckling deformation was completely eliminated.
  • Containers according to the present invention accordingly have circumferential ribs which act as reinforcing ribs. Accordingly, the mechanical durability of the lower end of the body (and the upper end of the body) with respect to the lateral load can be considerably increased. Moreover, the occurrence of the buckling deformation of the lower end of the body (and the upper end of the body) when the container is pressed and slidably conveyed can be prevented.
  • the circumferential ribs are formed and externally swelled by bending a wall having a substantially same wall thickness of the lower end of the body (and the upper end of the body). Accordingly, it is not necessary to increase the wall thickness of the lower end of the body (and the upper end of the body) partially to be projected. There occurs no inconvenience that the wall thickness of the other portions of the body of the container is reduced so as to lower the fundamental function of the container as a container. Since it is not necessary that synthetic resin material be further added to partially increase the wall thickness of the lower end of the body (and the upper end of the body), the unit price of containers is not increased due to the increase in material cost for molding containers.
  • a container can be molded with a uniform wall thickness for the body of the container, wall thickness controlling means are not required. Accordingly, the molding operation for the container is simple.
  • Portions to be contacted by an adjacent container are specified by the circumferential ribs. Accordingly, the mode of transmission of the pressing force as the conveying force of the containers is constant, whereby the upright attitude of the containers pressed and slidably conveyed is stabilized.

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)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
EP89310710A 1989-10-07 1989-10-18 Blow-moulded bottle-shaped container made of synthetic resin Expired - Lifetime EP0423406B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN89107811.8A CN1022900C (zh) 1989-10-07 1989-10-07 合成树脂制延伸成型瓶体
AU42930/89A AU635900B2 (en) 1989-10-07 1989-10-16 Blow-molded bottle-shaped container made of synthetic resin
CA002000959A CA2000959C (en) 1989-10-07 1989-10-18 Blow-molded bottle-shaped container made of synthetic resin
AT89310710T ATE107593T1 (de) 1989-10-07 1989-10-18 Blasgeformter flaschenförmiger kunststoffbehälter.
DE68916429T DE68916429T2 (de) 1989-10-07 1989-10-18 Blasgeformter flaschenförmiger Kunststoffbehälter.
ES89310710T ES2055091T3 (es) 1989-10-07 1989-10-18 Vasija en forma de botella biaxialmente moldeada por soplado.
EP89310710A EP0423406B1 (en) 1989-10-07 1989-10-18 Blow-moulded bottle-shaped container made of synthetic resin

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN89107811.8A CN1022900C (zh) 1989-10-07 1989-10-07 合成树脂制延伸成型瓶体
AU42930/89A AU635900B2 (en) 1989-10-07 1989-10-16 Blow-molded bottle-shaped container made of synthetic resin
CA002000959A CA2000959C (en) 1989-10-07 1989-10-18 Blow-molded bottle-shaped container made of synthetic resin
EP89310710A EP0423406B1 (en) 1989-10-07 1989-10-18 Blow-moulded bottle-shaped container made of synthetic resin

Publications (2)

Publication Number Publication Date
EP0423406A1 EP0423406A1 (en) 1991-04-24
EP0423406B1 true EP0423406B1 (en) 1994-06-22

Family

ID=27423218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89310710A Expired - Lifetime EP0423406B1 (en) 1989-10-07 1989-10-18 Blow-moulded bottle-shaped container made of synthetic resin

Country Status (7)

Country Link
EP (1) EP0423406B1 (es)
CN (1) CN1022900C (es)
AT (1) ATE107593T1 (es)
AU (1) AU635900B2 (es)
CA (1) CA2000959C (es)
DE (1) DE68916429T2 (es)
ES (1) ES2055091T3 (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0644806Y2 (ja) * 1989-07-10 1994-11-16 株式会社吉野工業所 合成樹脂製壜体
AU647375B2 (en) * 1989-09-29 1994-03-24 Yoshino Kogyosho Co., Ltd. Biaxially stretched blow molded bottle
US5383558A (en) * 1992-09-11 1995-01-24 Kraft General Foods, Inc. Sealed container
US5337909A (en) * 1993-02-12 1994-08-16 Hoover Universal, Inc. Hot fill plastic container having a radial reinforcement rib
NZ250854A (en) * 1993-02-18 1995-07-26 Continental Pet Technologies Squeezable dent-resistant plastics container with vertical recesses between panels and posts having flex points and steps to inhibit permanent deformation
US5341946A (en) * 1993-03-26 1994-08-30 Hoover Universal, Inc. Hot fill plastic container having reinforced pressure absorption panels
AU1495395A (en) * 1994-04-29 1995-11-09 Constar Plastics Inc. Plastic bottle having enhanced sculptured surface appearance
US5971184A (en) * 1997-10-28 1999-10-26 Continental Pet Technologies, Inc. Hot-fillable plastic container with grippable body
US6260722B1 (en) 1999-12-29 2001-07-17 Phoenix Closures, Inc. Cap and container assembly
US6257432B1 (en) 1999-12-29 2001-07-10 Phoenix Closures, Inc. Cap and container assembly
US7172087B1 (en) 2003-09-17 2007-02-06 Graham Packaging Company, Lp Squeezable container and method of manufacture
AU2009218025B2 (en) * 2008-02-29 2013-08-29 Yoshino Kogyosho Co., Ltd. Blow molded container and process for molding the same
US9981768B1 (en) * 2016-09-02 2018-05-29 Milacron Llc Container and method of manufacturing the same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH386268A (de) * 1961-07-19 1964-12-31 Stockar Georg Klaus Dipl Ing C Behälter, insbesondere Flasche aus Polyäthylen
GB1074162A (en) * 1965-03-10 1967-06-28 Metal Box Co Ltd Improvements in or relating to bottles made of synthetic thermoplastic material
JPS6128736Y2 (es) * 1978-07-10 1986-08-26
DE3215866A1 (de) * 1982-04-29 1983-11-03 Seltmann, Hans-Jürgen, 2000 Hamburg Gestaltung von kunststoffbehaeltern zum ausgleich von druckaenderungen unter beibehaltung hoher stabilitaet
EP0506065B1 (en) * 1987-02-17 1995-01-25 Yoshino Kogyosho Co., Ltd. Pressure resistant bottle-shaped container
US4894268A (en) * 1987-12-07 1990-01-16 Sonoco Products Company Stretch blow-molded polyethylene terephthalate wide mouth container and intermediate article

Also Published As

Publication number Publication date
AU4293089A (en) 1991-06-06
CA2000959C (en) 1999-01-12
EP0423406A1 (en) 1991-04-24
AU635900B2 (en) 1993-04-08
ATE107593T1 (de) 1994-07-15
DE68916429D1 (de) 1994-07-28
ES2055091T3 (es) 1994-08-16
CN1050853A (zh) 1991-04-24
CA2000959A1 (en) 1991-04-18
CN1022900C (zh) 1993-12-01
DE68916429T2 (de) 1994-10-20

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