EP0572722A1 - Anti-bulging container - Google Patents
Anti-bulging container Download PDFInfo
- Publication number
- EP0572722A1 EP0572722A1 EP92201566A EP92201566A EP0572722A1 EP 0572722 A1 EP0572722 A1 EP 0572722A1 EP 92201566 A EP92201566 A EP 92201566A EP 92201566 A EP92201566 A EP 92201566A EP 0572722 A1 EP0572722 A1 EP 0572722A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- base
- curve
- section
- plane
- 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
Links
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Packages (AREA)
Abstract
Description
- The present invention relates to a container of thermoplastic material for containing liquids. The container is designed so as to resist bulging.
- It is well known in the art to use thermoplastic materials to manufacture containers for liquids. Some of the liquids to be contained by such containers, for instance bleach-containing compositions, create internal pressure which builds up with time. In such cases, the containers are progressively subjected to deformation due to the internal pressure build-up, especially at their base. This phenomenon is often referred to as "bulging". This phenomenon is especially acute in warm countries where the containers may be exposed to particularly elevated temperatures. In some instances, bulging can be so severe so as to induce a base deformation which is such that the container can no longer stay in upright position. For instance in supermarkets, the containers may fall of the shelves.
- Anti-bulging containers have been disclosed in the art, for instance in DE 16 07 895, DE 21 11 534, EP 0 002 082 and our co-pending European Application EP 91202524. These references disclose containers having a central dome, where the dome is connected to the side walls of the container by pieces of thermoplastic material of various shapes.
It is therefore an object of the present invention to provide a container of thermoplastic material for containing liquids with improved resistance to bulging. - It is also an object of the present invention to provide a solution to bulging which is particularly applicable to containers of smaller size.
- The problem of bulging can to some extent be addressed by increasing the quantity of thermoplastic material used, so as to manufacture a container with thick walls. However, this solution is quite objectionable from an environmental point of view as well as from an ease of manufacturing viewpoint. It is therefore an another object of the present invention to provide an anti-bulging container of thermoplastic material having walls of minimum thickness.
- The present invention is a container (1) of thermoplastic material comprising a side wall (2) and a base (3), said base comprising, in a cross section in a plane comprising the container's vertical axis (A), a concave inwards curved section (4) connected to the side wall (2), at least two successive stairs, each stair consisting of a straight part (5,5') forming an angle (α1,α2) with a plane (B) perpendicular to said axis (A), followed by a sharp concave outwards curve (6,6'), and a dome (8) consisting of a smooth concave outwards curve. The base (3) of the container (1) is symmetrical about said axis (A).
- The container according to the invention is made of a thermoplastic material. Such materials have been extensively described in the art and include vinyl chloride based resins, polymers and copolymers derived from olefins, acrylic polymers and copolymers, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyethylene terephthalate glycol, or mixtures thereof. The container can be made by single or multi layer extrusion of such materials. It can also be made out of recycled thermoplastic materials. A preferred thermoplastic material for use herein is polyethylene.
- The cross section of the container according to the present invention, and/or its base, in a plane perpendicular to the container's vertical axis (A), can be square or rectangular, ovoid or circular. Furthermore, the base (3) of the container according to the present invention is symmetrical about said axis (A). In a preferred embodiment of the invention, said cross section is circular. . The present invention is particularly suitable for containers of rather small size, i.e. where the container's largest dimension in said cross section is less than 10cm.
- The following description refers to fig 1 which represents the lower part of the container in a cross section in a plane comprising the container's central vertical axis (A). Fig 2 represents a scale up of the lower part of the container, on one side of (A).
- The container (1) according to the present invention comprises a side wall (2) and a base (3). The base (3) which is the gist of the present invention is connected to the side wall (2). The base (3) comprises a curved section (4), followed by at least two stairs (5/6,5'/6') and a dome (8).
- The curved section (4) is connected at one extremity to the side wall(2), and at the other extremity to at least two successive stairs. The curve of said curved section (4) is concave inwards, i.e. the interior of said curve faces the inside of the container.
- Each stair comprises a straight part (5,5') followed by a sharp curve (6,6'). The straight parts (5,5') can be of same dimensions, but in a preferred embodiment, the straight part which is the closest to the periphery of the container is longer than straight part which is closest to the center of the container. Each straight part (5,5') forms an angle (α1,α2) with a plane (B) perpendicular to the container's vertical central axis (A). According to the present invention, α1 and α2 can be different, but in a preferred embodiment of the invention α1 and α2 are the same. Each straight part (5,5') is connected to a sharp curve (6,6'). By sharp curve, it is meant herein a curve who's radius is smaller than the radius of the curved section (4). said sharp curves (6,6') are concave outwards, i.e. the interior of each sharp curve (6,6') faces the outside of the container. The radius of the sharp curves (6,6') can be identical, but in a preferred embodiment, the radius of the sharp curve which is closest to the periphery of the container is larger than the radius of the sharp curve which is closest to the center of the container. In a preferred embodiment of the present invention, the base (3) only comprise two stairs.
- The sharp curve of the stair which is closest to the center of the container is connected to a dome (8). The dome (8) consists of a smooth curve. Said smooth curve is concave outwards, i.e. the interior of said curve faces the outside of the container. By smooth curve, it is meant herein a curve who's radius is larger than the radius of both curved sections (6,6').
- The present invention is further illustrated by the following example.
- A cylindrical container according to the present invention is made out of polyethylene. It has a diameter of 90mm. The radius of the curved section (4) is 5.5mm. The length of the straight part (5) measured along plane (B) is 11.5 mm. The radius of the sharp curve (6) is 3mm. The length of the straight part (5') measured along plane (B) is 4.65mm. The radius of the sharp curve (6') is 2mm. Finally, the radius of the dome is 90mm. The thickness of the thermoplastic material used for this embodiment is 1.5mm throughout the container.
Claims (7)
- A container (1) of thermoplastic material comprising a side wall (2) and a base (3), said base comprising in a cross section in a plane comprising the container's vertical axis (A), a concave inwards curved section (4) connected to the side wall (2), at least two successive stairs, each stair consisting of a straight part (5,5') forming an angle (α1,α2) with a plane (B) perpendicular to said axis (A), followed by a sharp concave outwards curve (6,6'), and a dome (8) consisting of a smooth concave outwards curve, said base (3) being symmetrical about said axis (A).
- A container according to claim 1 which has a larger dimension in a cross section in a plane perpendicular to the container's central vertical axis of less than 10cm.
- A container according to the preceding claims which has a circular cross section in a plane perpendicular to the container's central vertical axis.
- A container according to the preceding claims comprising only two stairs
- A container according to the preceding claims wherein the straight part (5) which is closest to the periphery of the container is longer than the straight part (5') which is closest to the center of the container.
- A container according to the preceding claims where the radius of the sharp concave outwards curve (6) which is closest to the periphery of the container is larger than the radius of the sharp concave outwards curve (6') which is closest to the center of the container.
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES92201566T ES2097268T3 (en) | 1992-06-02 | 1992-06-02 | CONTAINER RESISTANT TO DEFORMATION. |
DE69217358T DE69217358T2 (en) | 1992-06-02 | 1992-06-02 | Deformation-resistant container |
EP92201566A EP0572722B1 (en) | 1992-06-02 | 1992-06-02 | Anti-bulging container |
AT92201566T ATE148668T1 (en) | 1992-06-02 | 1992-06-02 | DEFORMATION-RESISTANT CONTAINER |
DK92201566.4T DK0572722T3 (en) | 1992-06-02 | 1992-06-02 | Container that prevents bulging |
CA002137146A CA2137146C (en) | 1992-06-02 | 1993-05-13 | Anti-bulging container |
US08/343,596 US5492245A (en) | 1992-06-02 | 1993-05-13 | Anti-bulging container |
BR9306481A BR9306481A (en) | 1992-06-02 | 1993-05-13 | Anti-bulging container |
PCT/US1993/004580 WO1993024377A1 (en) | 1992-06-02 | 1993-05-13 | Anti-bulging container |
JP6500580A JP2980684B2 (en) | 1992-06-02 | 1993-05-13 | Swelling prevention container |
TR00416/93A TR27426A (en) | 1992-06-02 | 1993-05-24 | Container without bombelesme. |
MA23198A MA22899A1 (en) | 1992-06-02 | 1993-05-28 | ANTI-SWELLING CONTAINER. |
IE041693A IE930416A1 (en) | 1992-06-02 | 1993-06-01 | Anti-bulging container |
GR970400199T GR3022504T3 (en) | 1992-06-02 | 1997-02-06 | Anti-bulging container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92201566A EP0572722B1 (en) | 1992-06-02 | 1992-06-02 | Anti-bulging container |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0572722A1 true EP0572722A1 (en) | 1993-12-08 |
EP0572722B1 EP0572722B1 (en) | 1997-02-05 |
Family
ID=8210643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92201566A Expired - Lifetime EP0572722B1 (en) | 1992-06-02 | 1992-06-02 | Anti-bulging container |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0572722B1 (en) |
JP (1) | JP2980684B2 (en) |
AT (1) | ATE148668T1 (en) |
BR (1) | BR9306481A (en) |
CA (1) | CA2137146C (en) |
DE (1) | DE69217358T2 (en) |
DK (1) | DK0572722T3 (en) |
ES (1) | ES2097268T3 (en) |
GR (1) | GR3022504T3 (en) |
IE (1) | IE930416A1 (en) |
MA (1) | MA22899A1 (en) |
TR (1) | TR27426A (en) |
WO (1) | WO1993024377A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0751071A1 (en) | 1995-06-26 | 1997-01-02 | The Procter & Gamble Company | A container for liquid products |
WO2014083255A1 (en) * | 2012-11-30 | 2014-06-05 | Sidel Participations | Container having a bottom provided with a vault with a double indentation |
EP2744714A1 (en) * | 2011-08-15 | 2014-06-25 | Graham Packaging Company, L.P. | Plastic containers having base configurations with particular up-stand geometries, and systems, methods, and base molds thereof |
EP2764967A1 (en) * | 2013-02-06 | 2014-08-13 | Sidel Participations | Mold for blow molding a hot-fill container with increased stretch ratios |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2717443B1 (en) * | 1994-03-16 | 1996-04-19 | Evian Eaux Min | Plastic molded bottle. |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2382373A1 (en) * | 1977-03-02 | 1978-09-29 | Solvay | HOLLOW BODY IN THERMOPLASTIC MATERIAL |
FR2429157A1 (en) * | 1978-06-21 | 1980-01-18 | Carnaud Total Interplastic | Blow moulded containers featuring a radiused impression in the base - to enhance local orientation and drop impact test resistance |
US4197954A (en) * | 1978-10-05 | 1980-04-15 | Ethyl Development Corporation | Container |
EP0014507A1 (en) * | 1979-02-07 | 1980-08-20 | SOLVAY & Cie (Société Anonyme) | Hollow body made of oriented thermoplastic material |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409167A (en) * | 1967-03-24 | 1968-11-05 | American Can Co | Container with flexible bottom |
US4120419A (en) * | 1976-02-23 | 1978-10-17 | National Steel Corporation | High strength seamless chime can body, sheet metal container for vacuum packs, and manufacture |
US4177746A (en) * | 1976-07-29 | 1979-12-11 | Reynolds Metals Company | Method of forming a container |
JPS5325186A (en) * | 1976-08-20 | 1978-03-08 | Daiwa Can Co Ltd | Metallic can for drink containing carbon dioxide or the like |
US4408698A (en) * | 1980-11-24 | 1983-10-11 | Ballester Jose F | Novel cover and container assembly |
US4542029A (en) * | 1981-06-19 | 1985-09-17 | American Can Company | Hot filled container |
-
1992
- 1992-06-02 AT AT92201566T patent/ATE148668T1/en not_active IP Right Cessation
- 1992-06-02 DK DK92201566.4T patent/DK0572722T3/en active
- 1992-06-02 DE DE69217358T patent/DE69217358T2/en not_active Expired - Fee Related
- 1992-06-02 ES ES92201566T patent/ES2097268T3/en not_active Expired - Lifetime
- 1992-06-02 EP EP92201566A patent/EP0572722B1/en not_active Expired - Lifetime
-
1993
- 1993-05-13 BR BR9306481A patent/BR9306481A/en unknown
- 1993-05-13 CA CA002137146A patent/CA2137146C/en not_active Expired - Fee Related
- 1993-05-13 WO PCT/US1993/004580 patent/WO1993024377A1/en active Application Filing
- 1993-05-13 JP JP6500580A patent/JP2980684B2/en not_active Expired - Fee Related
- 1993-05-24 TR TR00416/93A patent/TR27426A/en unknown
- 1993-05-28 MA MA23198A patent/MA22899A1/en unknown
- 1993-06-01 IE IE041693A patent/IE930416A1/en not_active Application Discontinuation
-
1997
- 1997-02-06 GR GR970400199T patent/GR3022504T3/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2382373A1 (en) * | 1977-03-02 | 1978-09-29 | Solvay | HOLLOW BODY IN THERMOPLASTIC MATERIAL |
FR2429157A1 (en) * | 1978-06-21 | 1980-01-18 | Carnaud Total Interplastic | Blow moulded containers featuring a radiused impression in the base - to enhance local orientation and drop impact test resistance |
US4197954A (en) * | 1978-10-05 | 1980-04-15 | Ethyl Development Corporation | Container |
EP0014507A1 (en) * | 1979-02-07 | 1980-08-20 | SOLVAY & Cie (Société Anonyme) | Hollow body made of oriented thermoplastic material |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0751071A1 (en) | 1995-06-26 | 1997-01-02 | The Procter & Gamble Company | A container for liquid products |
EP2744714A1 (en) * | 2011-08-15 | 2014-06-25 | Graham Packaging Company, L.P. | Plastic containers having base configurations with particular up-stand geometries, and systems, methods, and base molds thereof |
EP2744714A4 (en) * | 2011-08-15 | 2015-03-25 | Graham Packaging Co | Plastic containers having base configurations with particular up-stand geometries, and systems, methods, and base molds thereof |
US9150320B2 (en) | 2011-08-15 | 2015-10-06 | Graham Packaging Company, L.P. | Plastic containers having base configurations with up-stand walls having a plurality of rings, and systems, methods, and base molds thereof |
AU2012295331B2 (en) * | 2011-08-15 | 2017-04-13 | Graham Packaging Company, L.P. | Plastic containers having base configurations with particular up-stand geometries, and systems, methods, and base molds thereof |
US10189596B2 (en) | 2011-08-15 | 2019-01-29 | Graham Packaging Company, L.P. | Plastic containers having base configurations with up-stand walls having a plurality of rings, and systems, methods, and base molds thereof |
WO2014083255A1 (en) * | 2012-11-30 | 2014-06-05 | Sidel Participations | Container having a bottom provided with a vault with a double indentation |
FR2998877A1 (en) * | 2012-11-30 | 2014-06-06 | Sidel Participations | CONTAINER HAVING BACKGROUND PROVIDED WITH A DOUBLE-BREAKDOWN VOUTE |
US9758271B2 (en) | 2012-11-30 | 2017-09-12 | Sidel Participations | Container having a bottom provided with a vault with a double indentation |
EP2764967A1 (en) * | 2013-02-06 | 2014-08-13 | Sidel Participations | Mold for blow molding a hot-fill container with increased stretch ratios |
WO2014122018A1 (en) * | 2013-02-06 | 2014-08-14 | Sidel Participations | Mold for blow molding a hot-fill container with increased stretch ratios |
US9757891B2 (en) | 2013-02-06 | 2017-09-12 | Sidel Participations | Mold for blow molding a hot-fill container with increased stretch ratios |
Also Published As
Publication number | Publication date |
---|---|
GR3022504T3 (en) | 1997-05-31 |
CA2137146A1 (en) | 1993-12-09 |
DE69217358D1 (en) | 1997-03-20 |
JP2980684B2 (en) | 1999-11-22 |
ES2097268T3 (en) | 1997-04-01 |
BR9306481A (en) | 1998-09-15 |
MA22899A1 (en) | 1993-12-31 |
JPH07507259A (en) | 1995-08-10 |
DE69217358T2 (en) | 1997-06-26 |
IE930416A1 (en) | 1993-12-15 |
CA2137146C (en) | 1998-09-22 |
ATE148668T1 (en) | 1997-02-15 |
EP0572722B1 (en) | 1997-02-05 |
DK0572722T3 (en) | 1997-04-01 |
WO1993024377A1 (en) | 1993-12-09 |
TR27426A (en) | 1995-04-21 |
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