EP2697125A1 - Fond de récipient pétaloïde à double vallée - Google Patents
Fond de récipient pétaloïde à double valléeInfo
- Publication number
- EP2697125A1 EP2697125A1 EP12722768.4A EP12722768A EP2697125A1 EP 2697125 A1 EP2697125 A1 EP 2697125A1 EP 12722768 A EP12722768 A EP 12722768A EP 2697125 A1 EP2697125 A1 EP 2697125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- circle
- section
- diameter
- inflection
- 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
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
Definitions
- the invention relates to the manufacture of containers, in particular bottles, obtained by blow molding or stretch blow molding from preforms or intermediate containers of thermoplastic material.
- a container generally comprises an open neck, through which the contents (for example a liquid), a body, which gives the container its volume, and a bottom, which closes the body opposite the neck and forms, are introduced or extracted. a base for holding and maintaining the container when it rests on a surface.
- contents for example a liquid
- body which gives the container its volume
- bottom which closes the body opposite the neck and forms
- the containers for carbonated beverages in which the pressure of the gas dissolved in the liquid induces significant mechanical stresses, are mainly provided with petaloid-shaped bottoms: the bottom comprises projecting feet, in the form of petals, separated by portions of convex wall, called hollows or valleys, which extend radially from a central zone of the bottom.
- the feet are intended to maintain the container placed on a surface; the valleys are intended to absorb the forces (thermal, mechanical) undergone by the bottom (weight of the contents and / or superimposed containers, if any).
- a plastic container comprising a body and a petaloid bottom extending the body from a periphery, the bottom comprising a bottom wall of generally convex outward shape, which project feet defining vertices together forming a seat inscribed in a diameter setting circle of which a ratio with a diameter of the periphery is less than 4/5, the legs being separated in pairs by portions of the bottom wall forming recessed valleys which extend radially from a central zone of the bottom to the periphery, wherein each Valley has two adjacent sections, namely:
- a central section which extends from the central zone of the bottom to a junction zone located in line with the laying circle, and has, in a radial plane, a first radius of curvature
- a peripheral section which extends from the junction zone to the periphery, and has, in said radial plane, a second radius of curvature, this peripheral section being offset towards the outside of the container by an offset value relative to the central section, the junction zone forming a recess.
- the recess creates a discontinuity in the junction zone on the valleys. Thus, it allows, on the one hand, to increase the rigidity of the bottom.
- the position of the recess improves the blowing at constant bottom height.
- the recess reduces the height of the feet, that is to say the dimension measured axially from the seat, defining a laying plane, to the periphery.
- This container may also include the following features, taken separately or in combination:
- the ratio between the diameter of the laying circle and the diameter of the periphery is greater than 1 ⁇ 2;
- each recess defines two successive points of inflection, the recesses defining together a first inflection circle and a second inflection circle, the diameter of the first inflection circle being smaller than the diameter of the second inflection circle;
- the ratio between the diameter of the laying circle and the diameter of the second inflection circle is between 1.3 and 0.7; the tangent to the first inflection point forms an angle with a vertical direction less than the angle formed by the tangent to the second point of inflection with the vertical direction;
- the bottom is provided with radial grooves extending along the valleys;
- the value of the offset and the value of the first radius of curvature are such that their E / C ratio is between 1/100 and 1/25; the E / C ratio is about 1/50;
- the central section and the peripheral section have uncombined centers of curvature
- the central section and the peripheral section have different radii of curvature.
- Figure 1 is a perspective view from below of a petaloid bottom container
- Figure 2 is an enlarged view of the bottom of the container of Figure 1;
- FIG. 3 is a bottom plan view of the bottom of FIG.
- Figure 4 is a partial section of a detail of the bottom of Figure 3, according to the sectional plane IV-IV;
- Figure 5 is a partial section of a detail of the bottom of Figure 3, according to the V-V section plane;
- Figure 6 is a sectional view of the bottom of Figure 3, according to the section plane VI-VI.
- Figure 7 is a sectional view of the bottom of Figure 3 along the section plane VII-VII;
- Figure 8 is a detail view of Figure 7;
- Figure 9 is a perspective view of a bottom according to another embodiment.
- Figure 10 is a radial sectional view of the bottom of Figure 9.
- a container 1 - in this case a bottle - obtained by blowing or stretch blow molding from a thermoplastic preform, for example polyethylene terephthalate (PET), previously heated.
- a thermoplastic preform for example polyethylene terephthalate (PET), previously heated.
- the container 1 extends along a main axis X defining a vertical direction and comprises a body 2 forming the side wall of the container 1 and a bottom 3, which extends the body 2 and closes the latter at a lower end thereof, forming the bottom wall of the container 1.
- the bottom 3 is petaloid, and comprises a bottom wall 4 generally shaped convex outwardly of the container 1 (that is to say down when the container is laid flat).
- the bottom 3 also comprises a series of feet 5 formed by outwardly protruding protrusions of the container 1, and which extend from a central zone 6 of the bottom 3 in the form of a pellet, where the material has remained substantially amorphous , towards a periphery 7 of the base 3 where it connects to the body 2.
- a diameter of the periphery, denoted by A is defined as being the minimum diameter of the circle in which the periphery 7 is inscribed. According to the preferred embodiment illustrated in the figures, the periphery 7 is circular, it being understood that the periphery 7 may be of any shape.
- the legs 5 become thinner from the inside towards the outside of the container 1 (ie downwards), and widening from the central zone 6 towards the periphery 7.
- the most protruding parts or vertices 8 feet 5 are included in a laying plane and together form a seat by which the container 1 can rest on a flat surface (for example a table).
- a setting circle 10 (represented in FIG. 3 by a dashed circle) is defined by the circle circumscribed at the vertices 8.
- the vertices 8 may have a certain thickness in the plane of application, so that the circle 10 laying may have a certain radial width (although small compared to the diameter of the circle 10) and thus be in the form of a ring.
- B is the diameter of the laying circle.
- Each foot 5 has an end face 11 which extends gently from the central zone 6 of the bottom 3 to the top 8, of so that the foot 5 has in radial section a substantially triangular profile (Figure 7). More precisely, as illustrated in FIG. 7, the end face 11 is slightly curved, concave towards the outside of the container 1, the concavity being accentuated close to the central zone 6 of the bottom 3.
- the legs 5 are separated in pairs by portions of the bottom wall 4 called valleys 12, which extend radially in a star from the central zone 6 to the periphery 7.
- the valleys 12 are concave outwards in cross section (that is to say in a plane perpendicular to the radial direction, see Figures 4 to 6).
- the radius of curvature of the valleys 12, measured in cross section, may be variable. More specifically, it is preferably low near the central zone 6, and relatively greater near the periphery 7.
- FIGS. 3 to 6 show that each valley 12 widens from the central zone 6 towards the periphery 7 that it joins. This widening is preferably continuous, that is to say that the edges of the valleys 12 form between them, at any point, a non-zero angle.
- the valleys 12 have a tulip-shaped (or bell-shaped) outline in plan, but this shape is not limiting, and the edges of the valleys 12 could be straight (the valleys 12 then having a contour in v).
- each valley 12 is devoid of branching (in particular on the periphery side 7), and thus forms a unitary hollow reserve.
- the feet 5 are equal in number to the valleys.
- the bottom 3 comprises five feet 5 and five valleys 12, regularly alternated and distributed in a star. This number is a good compromise; it could however be less (but greater than or equal to three), or greater (but preferably less than or equal to seven).
- Each foot 5 has two substantially planar flanks 13 each bordering a valley 12.
- the flanks 13 are not vertical (since the bottom 3 would then be difficult, if not impossible to blow), but inclined. approaching from the valley 12 to the end face 11 of a foot.
- the flanks 13 are connected to the end face 11 by a fillet 14.
- Each foot 5 is further delimited radially by an external face 15 which extends in the extension of the body 2 to the vicinity of the apex 8, to which the external face 15 is connected by a fillet 16.
- the outer face connects to the body 2 by a leave.
- the outer face 15 is not cylindrical but substantially conical in revolution about the axis X. More specifically, the outer face 15 is inclined towards the central zone 6 of the bottom 3 of the container 1 when approaching the laying plane . In addition, in radial section the outer face is not straight but convex.
- the vertices 8 of the feet 5 are thus shifted towards the central zone 6 of the base 3, that is to say that they are not at right of the periphery 7. More precisely, the vertices 8 of the feet 5 are positioned so that the laying circle 10 is located radially recessed relative to the periphery 7, that is to say with respect to the circle in which is inscribed the periphery 7. In addition, the ratio between the diameter B of the laying circle 10 and the diameter A of the periphery 7 is less than 4/5.
- the ratio between the diameter B of the laying circle 10 and the diameter A of the periphery 7 is between 2/5 and 4/5, and more preferably, the ratio between the diameters B and A is greater than 1. / 2, for example (as in the example shown) equal to 7/10.
- a central section 17 which extends from the central zone 6 of the bottom 3 to a junction zone 18 located in line with the laying circle, and which has, in a radial plane, a first radius C of curvature ,
- a peripheral section 19 which extends from the junction zone 18 to the periphery 7, and has, in said radial plane, a second radius D of curvature, this peripheral section 19 being shifted towards the outside of the container 1 relative to the central section 17, the junction zone 18 forming a recess 20.
- Curves C and D are not necessarily constant but may vary with the distance to the main X axis; in addition, the centers of curvature of sections 17 and 19 are not necessarily confused or located on the main axis X of the container.
- E is the value of the offset between the central section 17 and the peripheral section 19. This offset E is defined as follows.
- the value of the offset E may be between 0.5 mm and 6 mm depending on the capacity of the container 1. For example, for a container 1 with a capacity of 1.5 L, the offset E is between 0 , 8 mm and 2 mm.
- a ratio between the offset E and the first radius C of curvature of the central section 17, ratio noted E / C, is defined.
- the E / C ratio is then advantageously between 1/100 and 1/25 and is for example equal to 1/50, as in FIGS. 1 to 8.
- the recess 20 thus creates a discontinuity in the zone 18 of junction on the valleys 12. More exactly, the recess 20 defines two successive points 21, 22 of inflection: a first point 21 of inflection to the change of concavity between the section 17 and the junction area 18 and a second point 22 of inflection between the junction area 18 and the peripheral section 19.
- each valley 12 presents successively, in a radial plane:
- first section (the central section 17) convex towards the outside of the container 1
- second section (the junction zone 18), concave towards the outside of the container 1
- the first point of inflection is softer than the second point
- the angle formed between the tangent to the first point of inflection and the vertical direction being less than the angle ⁇ formed between the tangent to the second inflection point 22 and the vertical direction.
- the angle ⁇ between the tangent to the first point of inflection 21 and the vertical direction is between 40 and 65 °, and is for example equal to about 55 °
- the angle ⁇ between the tangent to the second point of inflection 22 and the vertical direction is between 70 and 85 °, and is for example equal to 80 °.
- the junction zone 18 is located vertically above the laying circle, that is to say that the laying circle and the joining zone 18, when seen rotated about the main axis X in a same radial plane (that of Figure 7), are substantially aligned in the vertical direction (parallel to the axis X). It is possible to define, as for the laying circle 10, a first inflection circle 23 passing through the first points 21 of inflection of the valleys 12 of the bottom 3 and a second inflection circle 24 passing through the second points 22. inflection of the bottom valleys 3 (shown in phantom in FIG. 3). It goes without saying that, given the position of the first inflection points 21 and the second inflection points 22, the diameter F of the first inflection circle 23 is smaller than the diameter G of the second inflection circle 24.
- the second inflection circle 24 is between the central zone 6 of the bottom 3 and the laying circle 10.
- the laying circle 10 may be for example between the two circles 23, 24 inflection.
- the ratio between the diameter B of the laying circle and the diameter G of the second inflection circle 24 is preferably between 1.3 and 0.7, and is, for example, approximately 1.1.
- the recess 20 allows, on the one hand, to increase the rigidity of the bottom. Its position, on the other hand, makes it possible to improve the blowing at constant bottom height 3. Indeed, on the one hand, the stresses generated for example by a pressure internal to the container 1 tend to accentuate the convexity of the valleys 12.
- the recess 20 reduces the height of the feet 5, that is to say the dimension measured axially from the laying plane to the plane of the periphery 7.
- the feet 5 are connected at the periphery 7 of the bottom 3 at a height lower than petaloid funds of the state of the art, for equivalent performance.
- the peripheral section 19 joins the periphery 7 at a lower height than if the central section 17 were extended to the periphery 7.
- the presence of the recess 20 between the central section 17 and the peripheral section 19 can be combined with additional features to stiffen the bottom 3.
- the bottom 3 may be provided with radial grooves which extend inwardly towards the inside of the container 1, at the bottom and along the valleys 12, the along a median line of a valley 12, from a neighborhood of the central zone 6 to the vicinity of the periphery 7.
- the grooves 25 have the function of further increasing the rigidity of the bottom 3.
- the grooves 25 in fact tend to flow in expanding and flattening, which causes a widening of the valleys 12 and, consequently, a verticalization of the feet 5 which opposes the overall subsidence of the bottom 3.
- the peripheral section 19 can be connected to the periphery 7 by means of an outer section 26 (FIGS. 9 and 10), concave in the absence of stresses, which increases the mechanical performance of the bottom 3. Indeed under the effect of a pressure internal to the container 1, for example during the filling of the container 1, the central section 17 and the peripheral section 19, both convex, of each valley 12, tend to swell, whereas there is a reversal of the concave outer section 26, which then adopts a convex profile. The peripheral section 19 and the outer section 26 then form in fine a single continuous convex profile. It seems that this combined deformation exerts on the central zone 6 an axial force directed towards the interior of the container 1 which opposes the force resulting from the hydrostatic thrust to which is added the additional pressure due to the dissolved gas, limiting thus the collapse of the central zone 6.
- the legs 5 of the bottom 3 can be stiffened thanks to the forming a projecting protruding stop, as described in document FR 2 897292, in the name of the applicant.
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1153190A FR2974069B1 (fr) | 2011-04-12 | 2011-04-12 | Fond de recipient petaloide a double vallee |
PCT/FR2012/050779 WO2012140358A1 (fr) | 2011-04-12 | 2012-04-10 | Fond de récipient pétaloïde à double vallée |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2697125A1 true EP2697125A1 (fr) | 2014-02-19 |
EP2697125B1 EP2697125B1 (fr) | 2018-07-04 |
Family
ID=46147487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12722768.4A Not-in-force EP2697125B1 (fr) | 2011-04-12 | 2012-04-10 | Fond de récipient pétaloïde à double vallée |
Country Status (5)
Country | Link |
---|---|
US (1) | US9623999B2 (fr) |
EP (1) | EP2697125B1 (fr) |
CN (1) | CN103547512B (fr) |
FR (1) | FR2974069B1 (fr) |
WO (1) | WO2012140358A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013110139A1 (de) * | 2013-09-13 | 2015-03-19 | Krones Ag | Kunststoffbehältnis mit wärmestabilem Boden |
USD792229S1 (en) | 2014-08-01 | 2017-07-18 | The Coca-Cola Company | Bottle |
US10858138B2 (en) * | 2014-12-19 | 2020-12-08 | The Coca-Cola Company | Carbonated beverage bottle bases and methods of making the same |
FR3032946B1 (fr) * | 2015-02-23 | 2017-02-10 | Sidel Participations | Recipient muni d'un fond mini petaloide a cannelures transversales |
JP2021506682A (ja) | 2017-12-15 | 2021-02-22 | ソシエテ・デ・プロデュイ・ネスレ・エス・アー | ボトル、その製造方法、並びにかかるボトルにおけるfdca及びジオールモノマーの使用 |
DE102022120143A1 (de) * | 2022-08-10 | 2024-02-15 | Krones Aktiengesellschaft | Kunststoffbehältnis mit Zugbandgeometrie am Bodenbereich |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249667A (en) * | 1979-10-25 | 1981-02-10 | The Continental Group, Inc. | Plastic container with a generally hemispherical bottom wall having hollow legs projecting therefrom |
GB2098167A (en) * | 1981-05-08 | 1982-11-17 | Owens Illinois Inc | Free-standing plastics containers |
US4867323A (en) * | 1988-07-15 | 1989-09-19 | Hoover Universal, Inc. | Blow molded bottle with improved self supporting base |
US5454481A (en) * | 1994-06-29 | 1995-10-03 | Pan Asian Plastics Corporation | Integrally blow molded container having radial base reinforcement structure |
US5529196A (en) * | 1994-09-09 | 1996-06-25 | Hoover Universal, Inc. | Carbonated beverage container with footed base structure |
JP3612775B2 (ja) * | 1995-03-28 | 2005-01-19 | 東洋製罐株式会社 | 耐熱耐圧自立容器及びその製造方法 |
US6019236A (en) * | 1997-09-10 | 2000-02-01 | Plastipak Packaging, Inc. | Plastic blow molded container having stable freestanding base |
FR2772720B1 (fr) * | 1997-12-23 | 2000-03-17 | Sidel Sa | Recipient en matiere thermoplastique a fond petaloide |
US5988416A (en) * | 1998-07-10 | 1999-11-23 | Crown Cork & Seal Technologies Corporation | Footed container and base therefor |
US6085924A (en) * | 1998-09-22 | 2000-07-11 | Ball Corporation | Plastic container for carbonated beverages |
US20060175283A1 (en) * | 2005-01-28 | 2006-08-10 | Graham Packaging Company, L.P. | Plastic container with improved petaloidal base |
FR2897292B1 (fr) | 2006-02-16 | 2010-06-04 | Sidel Participations | Fond de moule pour moule de fabrication de recipients thermoplastiques, et dispositif de moulage equipe d'au moins un moule equipe d'un tel fond |
FR2932458B1 (fr) * | 2008-06-13 | 2010-08-20 | Sidel Participations | Recipient, notamment bouteille, en matiere thermoplastique equipe d'un fond renforce |
DE102008047450A1 (de) * | 2008-09-15 | 2010-04-15 | Krones Ag | Kunststoffbehältnis |
-
2011
- 2011-04-12 FR FR1153190A patent/FR2974069B1/fr not_active Expired - Fee Related
-
2012
- 2012-04-10 EP EP12722768.4A patent/EP2697125B1/fr not_active Not-in-force
- 2012-04-10 US US14/110,308 patent/US9623999B2/en not_active Expired - Fee Related
- 2012-04-10 CN CN201280024631.6A patent/CN103547512B/zh not_active Expired - Fee Related
- 2012-04-10 WO PCT/FR2012/050779 patent/WO2012140358A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012140358A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2697125B1 (fr) | 2018-07-04 |
US9623999B2 (en) | 2017-04-18 |
CN103547512A (zh) | 2014-01-29 |
US20140103007A1 (en) | 2014-04-17 |
WO2012140358A1 (fr) | 2012-10-18 |
FR2974069A1 (fr) | 2012-10-19 |
CN103547512B (zh) | 2015-11-25 |
FR2974069B1 (fr) | 2014-08-08 |
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