WO2008115810A1 - Conteneur ayant des panneaux métastables - Google Patents

Conteneur ayant des panneaux métastables Download PDF

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Publication number
WO2008115810A1
WO2008115810A1 PCT/US2008/057053 US2008057053W WO2008115810A1 WO 2008115810 A1 WO2008115810 A1 WO 2008115810A1 US 2008057053 W US2008057053 W US 2008057053W WO 2008115810 A1 WO2008115810 A1 WO 2008115810A1
Authority
WO
WIPO (PCT)
Prior art keywords
bottle
field
stage
groove
vacuum
Prior art date
Application number
PCT/US2008/057053
Other languages
English (en)
Inventor
Satya Kamineni
Timothy J. Boyd
Michael R. Mooney
Original Assignee
Constar International Inc.
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 Constar International Inc. filed Critical Constar International Inc.
Priority to US12/531,401 priority Critical patent/US20100176081A1/en
Publication of WO2008115810A1 publication Critical patent/WO2008115810A1/fr

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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
    • 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
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0084—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the sidewall or shoulder part thereof
    • 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
    • B65D2501/0027—Hollow longitudinal ribs
    • 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 the structure and function of containers, and more particularly to containers capable of receiving hot fluids and having panels capable of inward deflection, and methods relating to same.
  • Perishable beverage and food products are often placed into containers at elevated temperatures.
  • the liquid or flowable product is charged into a container at elevated temperatures, such as 180 to 190 degrees F, under approximately atmospheric pressure.
  • a cap hermetically seals the product within the container while the product is at the hot-filling temperature
  • hot- fill plastic containers are subject to negative internal pressure (that is, relative to ambient pressure) upon cooling and contraction of the products and any entrapped air in the head-space.
  • the phrase hot filling as used in the description encompasses filling a container with a product at an elevated temperature, capping or sealing the container, and allowing the package to cool.
  • Some container designs are symmetric about a longitudinal centerline and designed with stiffeners to maintain the intended cylindrical shape while the vacuum panels deflect.
  • United States Patent Numbers 5,178,289; 5,092,475; and 5,054,632 teach stiffening portions or ribs to increase hoop stiffness and eliminate bulges while integral vacuum panels collapse inwardly.
  • United States Patent Number 4,863,046 is designed to provide volumetric shrinkage of less than one percent in hot-fill applications.
  • Other containers include a pair of vacuum panels, each of which has an indentation or grip portion enabling the container to be gripped between a user's thumb and fingers.
  • United States Patent Number 5,141,120 teaches a bottle having a hinge continuously surrounding a vacuum panel, which includes indentations for gripping. In response to cooling of the container contents, the hinge enables the entire vacuum panel to collapse inwardly.
  • a graph of internal pressure vs. volumetric displacement in response to internal vacuum is a straight line.
  • Some references disclose vacuum panels in hot fill containers having portions that invert from an outwardly bulged state to an inwardly bulged state during the deflection process.
  • United States Patent Number 5,141,121 discloses a vacuum panel having an outwardly bulged surface that inverts relative to a vertical plane in response to internal vacuum.
  • United States Patent Application Number 10/361,356 (Lane) discloses a vacuum panel for a hot fill container having a compound curve and indents. A central portion of the vacuum panel inverts to produce a sharp downward deviation in the graph of internal vacuum versus volume displacement represented in Figure 7 of the 356 application. Outside of the panel inversions, the graph of Figure 7 of the 356 application is a series of straight lines that appear to share approximately the same slope.
  • a container having at least one metastable volume compensation panel is provided.
  • the metastable panel may have a first stiffness, undergoes a buckling or like phenomenon, and has a second stiffness after buckling.
  • the buckling or the like phenomenon occurs in a local or small area and enables the change in stiffness.
  • a plastic bottle suitable for hot-filling comprises an enclosed circular base; an upper portion including an opening; and a body disposed between the base and the upper portion.
  • the body includes a sidewall and at least one volume compensation panel that generally deflects inwardly in response to negative pressure after hot filling, such that during a pre-yielding stage, the vacuum panel deflects inwardly at a first stiffness and, during a post-yielding stage, the vacuum panel deflects inwardly at a second stiffness.
  • a portion of the panel yields during the inward deflection, thereby facilitating a change in stiffness, and the first stiffness does not equal the second stiffness.
  • the yielding stage includes buckling.
  • Each panels may include a groove disposed between a pair of fields. In this configuration, a portion of the groove slowly gives way during said inward deflection, thereby facilitating the stiffness variation, or a portion of the groove buckles during said inward deflection, thereby facilitating the stiffness variation.
  • Each panel may also include a pair of opposing rim walls, a pair of raised fields disposed within said edge, and a groove disposed between the fields. The rim walls is located proximate a corresponding edge of the body sidewall.
  • the bottom the groove is higher than a bottom of the rim walls, and each one of an uppermost portion of the fields is higher than the bottom of the groove.
  • the grove has a pair of opposing end walls that extend inwardly from the groove bottom to the rim walls, and the groove extends approximately from one of the rim walls approximately to the opposing rim. In some configurations, the end walls buckle in response to the negative pressure. Often, it is the buckling that enables inward movement of the groove.
  • a plastic bottle suitable for hot- filling comprises an enclosed circular base; an upper portion including an opening; and a body located between the base and the upper portion.
  • the body includes a sidewall and at least two volume compensation panels that deflect inwardly after hot-filling.
  • Each one of the panels includes an upper field, a lower field, and a rib that is disposed between the upper and lower fields and that includes an oblique portion that buckles during the volume compensation process.
  • the buckling facilitates inward movement of the upper and lower fields changes the stiffness from a pre -buckling value to a post-buckling value.
  • a method of absorbing negative pressure within a hot-filled plastic bottle comprises the steps of providing a bottle and filling the bottle with a liquid product at an elevated temperature and sealing or capping the opening.
  • the bottle has an enclosed circular base; an upper portion including an opening; and a body located between the base and the upper portion.
  • the body includes a sidewall and at least two volume compensation panels, as generally described above.
  • the method also includes that at least a portion of the panels deflect inwardly after the filling and sealing step in response to negative pressure within the bottle.
  • the inward deflection includes a first main stage wherein the volume compensation panels exhibit a first stiffness and a second main stage wherein the volume compensation panels exhibit a second stiffness.
  • a plastic bottle suitable for a hot- filling process in which internal vacuum is created comprises an enclosed circular base, an upper portion including an opening; and a body located between the base and the upper portion.
  • the body includes a sidewall and at least one volume compensation panel that generally deflects inwardly in response to vacuum after hot filling.
  • the panel has an upper field, a lower field, and a hinge located between the upper and lower fields, such that deformation of the panel in response to vacuum occurs in a first stage, a transition stage after the first stage, and a second stage after the transition stage; such that: (i) in the first stage the upper field and lower field are gradually drawn inwardly in response to vacuum; (ii) the transition stage is unstable such that at least a portion of the panel jumps from the first yielding stage to the second yielding stage; and (iii) in the second yielding stage the upper field and lower field are gradually drawn inwardly in response to vacuum.
  • each of the upper field and the lower field have an inner end located proximate the hinge and an outer end located distal from the hinge, and the inward deformation of each field inner end is greater than the deformation of the each field outer end. Also preferably, the inward deformation of each field inner end is greater than the deformation of the each field at its longitudinal center. And wherein, in longitudinal cross section, a line between the upper field outer end and the upper field inner end forms an internal angle with a line between the lower filed outer end and the upper field inner end, and the angle is less than 180 degrees. This angle may go to approximately 180 degrees or more after vacuum deformation is complete.
  • the inner end of the upper field is located at the lowermost end of the upper field, and the inner end of lower field is located at the uppermost end of the lower field, and the hinge is formed by an approximately horizontal groove.
  • a plastic bottle suitable for a hot-filling process in which internal vacuum is created comprisingan enclosed circular base; an upper portion including an opening; and a body located between the base and the upper portion.
  • the body includes a sidewall and at least one volume compensation panel that generally deflects inwardly in response to vacuum after hot filling.
  • the panel has an upper field, a lower field, and an interruption separating the upper field from the lower field.
  • Each one of the upper field and the lower field forms a peak before the bottle is deformed by the vacuum, the lower field peak is located opposite the upper field peak relative to the interruption.
  • the deformation of the panel in response to vacuum occurs in a first stage, a transition stage after the first stage, and a second stage after the transition stage; such that: (i) in the first stage the upper field and lower field are gradually drawn inwardly in response to vacuum; (ii) the transition stage in which at least a portion of the panel jumps from the first yielding stage to the second yielding stage; and (iii) in the second yielding stage the upper field and lower field are gradually drawn inwardly in response to vacuum, and wherein radial height, relative to other portions of the fields, of each of the peaks is reduced upon vacuum deformation.
  • a plastic bottle suitable for a hot- filling process in which internal vacuum is created comprises an enclosed circular base; an upper portion including an opening; and a body located between the base and the upper portion.
  • the body includes a sidewall and at least one volume compensation panel including: an upper field that, in longitudinal cross section, has a radial peak; a lower field that, in longitudinal cross section, has a radial peak; an approximately horizontal groove, located between the upper field and the lower field, that separates the upper field peak from the lower field peak; wherein radial height, relative to other portions of the fields, of each of the peaks is reduced upon vacuum deformation.
  • a groove may extend around the panel and merge with the sidewall.
  • the peaks are distal to the upper and lower edges of the panel and each one of the fields has a width proximate its peak that is smaller than a width proximate the upper and lower edges of the field, whereby the panels and groove form an hourglass shape.
  • the upper field preferably has a width that gradually narrows from its upper edge to its peak and the lower field has a width gradually narrows from its lower edge to its peak.
  • a pair of opposing inclined walls may extend from the groove along side edges of the panel generally radially outwardly to side edges of the fields and to the groove.
  • Figure 1 is a perspective view of a first container illustrating a first embodiment of the vacuum absorption panel before filling
  • Figure 2 is a first side elevational view of the container shown in Figure i;
  • Figure 3 is a second side elevational view of the container shown in
  • Figure 4 A is an enlarged longitudinal cross sectional view taken through lines IV-IV in Figure 2 showing the container in its as-molded state;
  • Figure 4B is the longitudinal cross-sectional view shown in Figure 4A showing the container in its as-molded state in dashed lines and in its filled & cooled or deformed state in solid lines;
  • Figure 5 A is a transverse cross-sectional view taken through lines V-V in Figure 2 showing the container in its as-molded state in dashed lines and in a partially deformed state in solid lines;
  • Figure 5B is a transverse cross-sectional view taken through lines V-V in Figure 2 showing the container in its as-molded state in dashed lines and in its filled
  • Figure 6A is a side elevational view of a second container having a second embodiment of the vacuum absorption panel
  • Figure 6B is a side elevational view of a variation of or modification to second embodiment container
  • Figure 7 A is a side elevational view of the second embodiment container taken perpendicular to the view of Figure 6A;
  • Figure 7B is a side elevational view of the second embodiment container taken perpendicular to the view of Figure 6B;
  • Figure 8 A is a transverse cross-sectional view of the second container taken through lines VIII-VIII in Figure 7B;
  • Figure 8B is a transverse cross-sectional view of the second container taken through lines VIII-VIII in Figure 7B and showing the container in its as-molded and fully deformed states;
  • Figure 9 A is a longitudinal cross-sectional view of the second container taken through line IX-IX in Figure 6A;
  • Figure 9B is a longitudinal cross-sectional view of the second container taken through line IX-IX in Figure 6A and showing the container in its as-molded state and deformed state;
  • Figure 10 is a gray-scale solid model perspective image of a third embodiment container;
  • Figure 10' is a color solid model perspective image of the third embodiment container;
  • Figure 11 is a side elevational view of the container of Figure 10;
  • Figure 12 is a side elevational view of the container of Figure 10 taken perpendicular to the view of Figure 11;
  • Figure 13 is a longitudinal cross-sectional view taken through line XIII-
  • Figure 14 is a transverse cross-sectional view taken through line XIV-
  • Figure 15 is a gray-scale solid model perspective images of a fourth embodiment container
  • Figure 15' is a color solid model perspective image of the fourth embodiment container
  • Figure 16 is an ideal graph of vacuum pressure versus deflection at the center of the volume compensation panel of the first embodiment container shown in Figure 1;
  • Figure 17 is a calculated plot of vacuum pressure versus deflection at the center of a volume compensation panel of the first embodiment container shown in Figure 1;
  • Figure 18A is a plot of vacuum pressure versus deflection at the center node of the panel of the second embodiment container shown in Figure 6 A upon hot filling;
  • Figure 18B is a plot of vacuum pressure versus container volume upon hot filling of the second embodiment container shown in Figure 6 A;
  • Figure 19A is a plot of vacuum pressure versus deflection at the center node of the panel of third embodiment container shown in Figure 10 upon hot filling;
  • Figure 19B is a plot of vacuum pressure versus container volume upon hot filling of the third embodiment container shown in Figure 10;
  • Figure 20 is a plot of vacuum pressure versus container volume upon hot filling of the fourth embodiment container shown in Figure 15;
  • Figure 21 A is a three dimensional plot of deformation under hot fill conditions of first embodiment container shown in Figure 15;
  • Figure 2 IB is a three dimensional plot of stress under hot fill conditions of first embodiment container shown in Figure 15;
  • Figure 22 A is a three dimensional plot of radial deformation under hot fill conditions of the third embodiment container shown in Figure 10;
  • Figure 22B is a three dimensional plot of overall deformation under hot fill conditions of the third embodiment container shown in Figure 10;
  • Figure 22C is a three dimensional plot of stress under hot fill conditions of the third embodiment container shown in Figure 10;
  • Figure 23 A is a three dimensional plot of radial deformation under hot fill conditions of the fourth embodiment container shown in Figure 15;
  • Figure 23B is a three dimensional plot of overall deformation under hot fill conditions of the fourth embodiment container shown in Figure 15;
  • Figure 23C is a three dimensional plot of stress under hot fill conditions of the fourth embodiment container shown in Figure 15.
  • container 10 includes a base 12, a body 14, an upper portion such as dome 16, and a finish 20.
  • Base 12 encompasses any type, and preferably includes a heel 24, a standing ring 26, and a reentrant portion 28.
  • an upper and lower shoulder 19a and 19b define a label panel.
  • Container embodiment 10 does not have a continuous waist, as it includes spaced-apart ribs 18a and 18b in the upper and lower portions of the body 14.
  • Body 14 may be considered to be the portion between upper and lower waists or ribs 18a and 18b.
  • Dome 16 extends upwardly from body 14 or upper shoulder 19a. Dome
  • FIG. 16 preferably narrows to finish 20, which has threads for engaging threads on a closure 22 that covers a pour opening 21.
  • a closure 22 for engagement with finish 18 is illustrated diagrammatically in Figure 2.
  • Each of the container embodiments is suitable for use with a closure.
  • Body 14 includes at least one volume absorption panel 30 located in bottle sidewall 32. As shown in the embodiment of Figure 1, body 14 may have a pair of opposing panels 30 that are spaced 180 degrees apart.
  • Panel 30 includes upper and lower fields 36a and 36b, and a rib or groove 38.
  • Groove 38 functions as a hinge or trigger such that upon sufficient activation energy or upon critical portions of groove 38 reaching their yield points, it yields to enable panel 30 to flex, as described more fully herein.
  • Each opposing side of panel 30 includes a rim 34 that merges into container sidewall 32.
  • Each rim 34 preferably is substantially straight and vertical, even though the present invention encompasses panels of any overall shape.
  • Each field 36a and 36b includes a field surface 46 (designated 46a and
  • Each field surface 46a and 146b preferably is nearly flat (in transverse cross section), formed by a single large radius, or other shape described more fully below.
  • the bottommost surface (in transverse cross section) of the intersection of sidewalls 48 and rims 34 is indicated by reference numeral 44 on Figures 5A and 5B.
  • Upper field 36a has an upper wall 50a and lower field 36b has a lower wall 50b that merge respectively into upper and lower ribs, as best shown in Figures 4A and 4B.
  • Upper wall 50a and lower wall 50b are referred to together as outboard walls 50.
  • Each field surface 46a and 46b preferably has a relatively large surface area (compared, for example, to the surfaces of groove 38 or transition walls 48).
  • Each field surface 46a and 46b is wider near its outboard end (that is, near the uppermost and lower most ends of panel 30) than near its inboard end (that is, near the center of the panel 30) such that each upper and lower field surface 46a and 46b forms an approximate lobe-shape and together approximately form an hourglass shape that is interrupted by groove 38.
  • each transition sidewall 48 forms an approximately triangular shape or D-shape, although the present invention encompasses other shapes.
  • Groove 38 preferably is at the center of panel 30 and horizontal. Groove
  • groove 38 includes generally opposing groove walls 58 that are preferably straight and that terminate at a groove bottom 60, as best shown in Figures 4A and 4B.
  • Groove walls preferably form an internal angle of 120 degrees, as illustrated in Figure 4 A, and preferably smoothly merges into transition sidewalls 48 at points designated by reference numeral 64 in Figures 5 A and 5B.
  • a radial position or height (that is, the radial dimension in transverse cross section) of each field surface 46a and 46b is greater than the height of the groove bottom 60, and groove bottom 60 has a radial position or height greater than rim bottom surface 44.
  • panel 30 is meta- stable, as described below in the discussion of the function of panel 30.
  • field heights Dl and D2 which represent the heights of the (longitudinally) innermost and uppermost portions of the field surfaces 46a and 46b, are 0.138 inches and 0.044 inches, respectively, as measured from a straight line between the upper and lower grooves 18a and 18b, as shown in Figure 4A.
  • the depth D3 of groove 38 (relative to sidewall 32) is approximately 0.100.
  • the depth D4 (relative to sidewall 32) of grooves 18a and 18b is 0.190 inches.
  • panel 30 preferably bulges slightly outwardly in its as-molded state when viewed in longitudinal cross section.
  • panel 30 in its fully deformed state is generally longitudinal such that field surfaces 46 are approximately parallel.
  • Figure 5 A shows container 10 in its as-molded state in dashed lines and in an intermediate state (that is, partly deformed) under vacuum conditions and near its point of instability, as explained more fully below, in solid lines. End points of groove 38 are indicated by reference numeral 64 in the as-molded state and by reference numeral 64' in its intermediate or partly deformed state.
  • Figure 5B shows container 10 in its fully deformed state in which groove ends, designated by reference numeral 64", have yielded or buckled, also referred to as jumped, such that is has reached a second point, after which deformation is not non- linear.
  • groove bottom 60 is approximately inline with end sidewalls 48 in the fully deformed state, as illustrated in Figure 5B.
  • a container second embodiment 110 is illustrated in Figures 6A, 6B,
  • FIG. 6A, 7B, 8A, 8B, 9A, and 9B The embodiment shown in Figures 6A and 7A is identical to the embodiment shown in Figures 6B, 7B, and 8 except a center rib is omitted from the sidewall of the latter, which is designated by reference numeral 110', for help in illustrating the transverse cross section. Accordingly, the description of container 110 also applies to container 110'.
  • Container 110 includes a base 112, a body 114, an upper portion such as dome 116, a waist 118, and a finish 120.
  • Base 112 encompasses any type, and preferably includes a heel 124, a standing ring 126, and a reentrant portion 128.
  • upper and lower shoulders 119a and 119b define a label panel.
  • Dome 116 extends upwardly from body 114 or upper shoulder 119a. Dome 116 preferably narrows to finish 120 that has threads for engaging threads on a closure, which is omitted from the figures showing the second embodiment 110 for clarity.
  • Body 114 includes at least one volume absorption panel 130 located in bottle sidewall 132. Body 114 may have a pair of opposing panels 130 that are spaced 180 degrees apart.
  • Panel 130 includes upper and lower fields 136a and 136b, and a rib or groove 138.
  • Groove 138 functions as a hinge or trigger such that upon sufficient activation energy or upon critical portions of groove 38 reaching their yield points, it yields to enable panel 30 to flex, as described more fully herein
  • Each opposing side of panel 130 includes a rim 134 that merges into container sidewall 132.
  • Each rim 134 preferably is substantially straight and vertical, even though the present invention encompasses panels of any overall shape.
  • Each field 136a and 136b includes a field surface 146 (designated 146a and 146b to indicate the corresponding upper and lower field surfaces) and opposing transition sidewalls 148 that extend between field surfaces 146a and 146b to container rims 134.
  • the bottommost surface (in transverse cross section) of the intersection of sidewalls 148 and rims 134 is indicated by reference numeral 144 on Figure 8.
  • Upper field 136a has an upper wall 150a and lower field 136b has a lower wall 150b that merge respectively into upper and portions of rim 134.
  • Upper wall 150a and lower wall 150b are referred to together as outboard walls 150.
  • Each field surface 146a and 146b preferably has relatively large surface area (compared, for example to the surfaces of groove 138 or transition walls 148). [0074] Each field surface 146a and 146b is wider near its outboard end (that is, near the uppermost and lower most ends of panel 130) than near its inboard end (that is, near the center of the panel 130) such that each upper and lower field surface 146a and 146b forms an approximate lobe-shape and together approximately form an hourglass shape that is interrupted by groove 138.
  • each transition sidewall 148 forms an approximately triangular shape or D-shape, although the present invention encompasses other shapes.
  • Groove 138 preferably is at the center of panel 30 and horizontal.
  • Groove 138 includes generally opposing groove walls 158 that are preferably straight and that terminate at a groove bottom 160, as best shown in Figure 8. Groove walls preferably form an internal angle of 120 degrees in transverse cross section, but the present invention encompasses any configuration. Groove 138 preferably smoothly merges into transition sidewalls 148 at points designated by reference numeral 164. [0076]
  • Container 110 has a volumetric capacity of 20 ounces; the heights and depths of panel 130 are approximately those provided for first embodiment container 10. Referring to Figures 8 A, 8B, 9 A, and 9B to illustrate additional dimensions and relationships, dimension D5 between surface 144 and groove bottom 160 is 0.090 inches.
  • transition wall 148 forms an angle A2 of 35 degrees from a reference line equidistant between opposing panels 130 or parallel to groove 138. Transition wall 148 and vertical rim 134 form an internal angle A3 of 85 degrees. The upper and lower portions of rim 134 approximately form an angle A4 of 60 degrees relative to a vertical reference line.
  • groove walls 158 form an internal angle A5 of 120 degrees.
  • Groove 138 preferably has a radius Rl of 0.20 inches at its bottom 160 and a radius R2 of 0.50 inches between groove walls 158 and field surfaces 146a and 146b.
  • Each field surface 146a and 146b is formed by a single radius R3 of approximately 9.4 inches.
  • the present invention encompasses field surfaces 146a and 146b (and of the other embodiments described herein) having shapes, in transverse cross section, other than a single radius, including being flat or approximately flat, having a radius that changes gradually or at a constant rate, or several radiuses that merge.
  • Figure 8b and Figure 9B illustrate container 110 in its as-mold state in solid lines and in its deformed state under normal vacuum conditions associated with hot filling in dashed lines.
  • Panel 130 preferably bulges slightly outwardly in its as- molded state when viewed in longitudinal cross section.
  • panel 130 in its fully deformed state is generally longitudinal such that field surfaces 146a and 146b are approximately parallel.
  • groove ends 64" preferably are line with groove bottom 60.
  • a container third embodiment 210 is illustrated in Figures 10, 11, 12, 13 and 14.
  • Container 210 includes a base 212 a body 214, an upper portion such as dome 216, a waist 218, and a finish 220 (not shown in figures for third embodiment container 210).
  • Base 212 encompasses any type, and preferably includes a heel 224, a standing ring 226, and a reentrant portion 228.
  • An upper and lower shoulder 219a and 219b define a label panel.
  • Dome 216 extends upwardly from body 214 or upper shoulder 219a. Dome 216 preferably narrows to finish 220 that has threads for engaging threads on a closure 222.
  • Body 214 includes at least one volume absorption panel 230 located in bottle sidewall 232.
  • Body 214 may have a pair of opposing panels 230 that are spaced 180 degrees apart.
  • Panel 230 includes upper and lower fields 236a and 236b, a horizontal rib or groove 238 separating the fields, and a vertical groove 239.
  • Each opposing side of panel 230 includes a rim 234 that merges into container sidewall 232.
  • Each rim 234 preferably is substantially straight and vertical, even though the present invention encompasses panels of any overall shape.
  • Each field 236a and 236b includes a field surface 246 (designated 246a and 246b to indicate the corresponding upper and lower field surfaces) and opposing transition sidewalls 248 that extend between field surfaces 246a and 246b to container rims 234.
  • the bottommost surface of the intersection of sidewalls 248 and rims 234 is indicated by reference numeral 244 on Figure 14.
  • Upper field 236a has an upper wall 250a and lower field 236b has a lower wall 250b that merge respectively into upper and portions of rim 234. Upper wall 250a and lower wall 250b are referred to together as outboard walls 250. The lower part of upper field 236a and the upper part of lower field 236b merge into groove 238.
  • Each field surface 246a and 246b preferably has relatively large surface area (compared, for example to the surfaces of groove 238 or transition walls 234).
  • Each field surface 246a and 246b is wider near its outboard end (that is, near the uppermost and lower most ends of panel 230) than near its inboard end (that is, near the center of the panel 230) such that each upper and lower field surface 246a and 246b forms an approximate lobe-shape and together approximately form an hourglass shape that is interrupted by groove 238.
  • each transition sidewall 248 forms an approximately triangular shape or D-shape, although the present invention encompasses other shapes.
  • Groove 238 preferably is at the center of panel and horizontal.
  • groove 238 includes generally opposing groove walls 258 that are preferably straight and that terminate at a groove bottom 260. Groove walls preferably form an internal angle of 120 degrees in transverse cross section, but the present invention encompasses any configuration. Groove 238 preferably smoothly merges into transition sidewalls 248 at points designated by reference numeral 264.
  • Container 210 has a volumetric capacity of 20 ounces and the panel 230 dimensions may be approximately the same as those of second embodiment container 110.
  • Figure 13 and Figure 14 illustrate container 210 in its as-mold state in solid lines and in its deformed state under normal vacuum conditions associated with hot filling in dashed lines.
  • Panel 230 preferably bulges slightly outwardly in its as-molded state and is concave in its fully deformed state when viewed in when viewed in longitudinal cross section. Panel 230 in its fully deformed state is concave when viewed in transverse cross section.
  • Groove 38 functions as a hinge or trigger such that, upon sufficient activation energy or upon critical portions of groove 38 reaching their yield points, it yields to enable panel 30 to flex, as described more fully herein.
  • Vertical groove 239 preferably is equidistant from groove ends 264 and perpendicular to the longitudinal axis of groove 238. Groove 239 extends into fields 246a and 246b and, preferably, does not extend fully to the upper and lower portions of rim 234. [0089] To achieve the concave shape, vertical groove 239 may act as a hinge or lower the activation energy required for panel 230 to reach the yielding or buckling stage.
  • a container fourth embodiment 310 illustrated in Figure 15, has the same structure as third embodiment container 210 in its base 312, dome 316, waist 318, finish 320, and sidewall 32. Its panels 330 have the same rim 334 and transition sidewalls 348 as third embodiment container 210 such that fields 346a and 346b have the same outline shape as that of third embodiment panels 230. [0091] Each panel 330 includes a pair of groove segments 328a and 328b.
  • bottle sidewall for each embodiment that is, sidewalls
  • 32, 132, 232, and 232 is generally cylindrical with horizontal ribs; the invention encompasses sidewalls of any shape.
  • the present invention is not limited to a particular number of panels, nor to their size, overall shape, or relative spacing about the container's circumference. The number of panels may be chosen according to well- known parameters that will be understood by persons familiar with hot-fill bottle technology upon reading the present disclosure. Also, the bodies of each embodiment may include additional structure, including but not limited to conventional or other panels not covered by the present invention.
  • containers 10, 110, 210, and 310 are formed of a conventional PET, and any other suitable material is contemplated.
  • the container embodiments having the features described herein may be formed of a relatively thinner sidewall.
  • the thin sidewalls may aid in the yielding (including reaching the elastic limit of the material or other modes of giving way) of portions of the containers (such as at intersections 64, 164, 264, and 364). Accordingly, the present panels are suitable for lightweight containers. [0095]
  • the following description of the operation refers to components of first embodiment container 10 for convenience, but is equally applicable to the function of containers 110, 210, and 310 unless stated otherwise.
  • container 10 is fill with a liquid product at an elevated temperature, such as 185 0 F, it is sealed and capped by closure 22. During subsequent cooling, the liquid product and any air in the headspace between the liquid and the seal cools and contracts.
  • the plastic material of container 10 may also undergo shrinkage that reduces its volume, but the container shrinkage is typically small compared to the product and headspace gas shrinkage. Accordingly, an internal negative pressure acts on container 10.
  • Figure 16 is an ideal graph of internal container pressure versus the magnitude of inward deflection of the center node (such as in the geometric center of groove 38) of a panel, such as panel 30, to illustrate the function of the panels disclosed herein.
  • stiffness generally refers to mechanical stiffness, and more particularly is defined as the local slope of the pressure versus deflection curve, such as the ideal curve shown in Figure 16.
  • the panel undergoes at least three distinct stages of deformation: a pre- yield stage, a yielding stage, and a post-yield stage.
  • yield encompasses buckling — that is, relatively sudden movement from one state or position to another state or position — and a slow progression from one state or position to another state or position.
  • the containers described herein may function as described herein, it is surmised, because a portion of the panel material (such as near groove end 64, 164, 264, and 364) reaches a yield point on the stress-strain curve such that the portion reaches its elastic limit; the present invention is not limited to structure that functions according to this principle, but also encompasses the other means for enabling the panel to give way in a manner in which no portion of the structure reaches its yield point. Further, the present invention encompasses the structure defined in the claims, regardless of its function.
  • Figure 17 is a calculated plot of internal bottle pressure versus magnitude of inward deflection of a center node - that is, a geometric center of groove 38 - of container 10 having panels 30 as described above upon hot filling and subsequent cooling. The calculations were performed using finite element analysis. The center node was chosen to isolate the function of panel 30 while the entire container undergoes vacuum absorption. In an initial stage, which is designated by reference letter I 1 , the inventors theorize that various portions of the container, such as (possibly) portions of the dome 16, sidewalls 32, bottom 214, and fields 46a and 46b, deform with little inward deformation of the center node. Alternatively, panel 30 may function as a conventional panel during this initial stage.
  • the pre-yield stage Bi begins, in which the predominant vacuum absorption mechanism is inward deflection of panel 30, which is evident by the lower slope manifested in stiffness modulus M B1 . Even though it is likely or possible that the mechanisms of initial deflection stage Ii are at least somewhat still present in pre-yield stage B 1 , modulus M B1 is approximately constant.
  • Figure 5 A which shows groove 38 during pre-yield stage B 1 , shows the calculated deformation of groove 38 and the movement of groove end walls 62 relative to groove bottom 60.
  • the extent of yielding or buckling can control the magnitude of volume compensation, as the localized zone of deformation enables larger deformation of the panel.
  • the inventors theorize that local stress at intersections 64 continues to rise (which is also generally referred to as rising activation energy) until reaching the yield stress of the material, at which point qi the yielding stage Ci begins.
  • Figure 17 illustrates that a large amount of center node deflection occurs relative to vacuum absorption.
  • Figure 5B illustrates groove 38 after yielding has occurred, such as at point Vi in Figure 17.
  • the solid line illustrating groove 38 shows portion 64" as a substantially straight portion between transition wall 34 and groove bottom 60, reflecting not only the inward movement of groove bottom 60, but also the overall change in shape of groove 38 and transition wall 34.
  • Figures 18A and 18B provide plots of vacuum pressure versus magnitude of center node deflection and vacuum pressure versus container volume change for second embodiment container 110 upon hot filling and subsequent cooling.
  • Figures 19A and 19B provide vacuum pressure versus magnitude of center node deflection and vacuum pressure versus container volume change for third embodiment container 210 upon hot filling and subsequent cooling.
  • Figure 20 provides vacuum pressure versus container volume change for fourth embodiment container 310 upon hot filling and subsequent cooling.
  • Figure 21 A and Figure 2 IB provide a three dimensional deformation plot and stress plot, respectively, of first embodiment container 10 upon hot filling.
  • Figures 22A and 22B provide, for third embodiment container 210, three dimensional plots of radial displacement and displacement, and Figure 22C provides a three dimensional plot of stress upon hot filling.
  • Figures 23 A and 23B provide, for fourth embodiment container 310, three dimensional plots of radial displacement and displacement, and Figure 23C provides a three dimensional plot of stress for hot filling
  • the description of the function of the container embodiments is directed to preferred embodiments of the structure and function of the present invention, but as is clear from the above description, the invention is not limited to the particular disclosed structure and function. Rather, the scope of the invention should be defined by the language of allowable claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

L'invention concerne un conteneur qui a des panneaux métastables afin de compenser le vide interne du remplissage chaud. Les panneaux comprennent une rainure qui évolue pendant la déformation de manière à ce que la rigidité du panneau varie de son stade de pré-évolution à son stage post-évolution.
PCT/US2008/057053 2007-03-16 2008-03-14 Conteneur ayant des panneaux métastables WO2008115810A1 (fr)

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US12/531,401 US20100176081A1 (en) 2007-03-16 2008-03-14 Container having meta-stable panels

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US89528807P 2007-03-16 2007-03-16
US60/895,288 2007-03-16

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Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2954287B1 (fr) * 2009-12-17 2012-08-03 Sidel Participations Recipient a flancs deformables
JP2013543805A (ja) 2010-11-12 2013-12-09 ナイアガラ・ボトリング・エルエルシー 軽量ボトルを加工するための伸長仕上げされたプリフォーム
US10118724B2 (en) 2010-11-12 2018-11-06 Niagara Bottling, Llc Preform extended finish for processing light weight ecologically beneficial bottles
US10647465B2 (en) 2010-11-12 2020-05-12 Niagara Bottling, Llc Perform extended finish for processing light weight ecologically beneficial bottles
US10829260B2 (en) 2010-11-12 2020-11-10 Niagara Bottling, Llc Preform extended finish for processing light weight ecologically beneficial bottles
US8556098B2 (en) 2011-12-05 2013-10-15 Niagara Bottling, Llc Plastic container having sidewall ribs with varying depth
US10023346B2 (en) 2012-12-27 2018-07-17 Niagara Bottling, Llc Swirl bell bottle with wavy ribs
US11845581B2 (en) 2011-12-05 2023-12-19 Niagara Bottling, Llc Swirl bell bottle with wavy ribs
DE102012003219A1 (de) 2012-02-20 2013-08-22 Krones Ag Kunststoffbehältnis
JP6342112B2 (ja) 2012-12-03 2018-06-13 サントリーホールディングス株式会社 樹脂製容器
BR112015015458A2 (pt) 2012-12-27 2017-07-11 Niagara Bottling Llc recipiente de plástico com base presa
USD699116S1 (en) 2013-05-07 2014-02-11 Niagara Bottling, Llc Plastic container
USD699115S1 (en) 2013-05-07 2014-02-11 Niagara Bottling, Llc Plastic container
USD696126S1 (en) 2013-05-07 2013-12-24 Niagara Bottling, Llc Plastic container
US10053275B2 (en) 2014-12-22 2018-08-21 Graham Packaging Company, L.P. Deformation-resistant container with panel indentations
CA2996862C (fr) * 2015-09-10 2024-02-27 Pepsico, Inc. Contenant dote d'une zone de logement de pression
USD806476S1 (en) 2016-06-03 2018-01-02 Shock Doctor, Inc. Hydration bladder
USD796903S1 (en) 2016-06-03 2017-09-12 Shock Doctor, Inc. Hydration bladder
US11597556B2 (en) 2018-07-30 2023-03-07 Niagara Bottling, Llc Container preform with tamper evidence finish portion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6763969B1 (en) * 1999-05-11 2004-07-20 Graham Packaging Company, L.P. Blow molded bottle with unframed flex panels
US20040155008A1 (en) * 2003-02-10 2004-08-12 Lane Michael T. Inverting vacuum panels for a plastic container
US20060180568A1 (en) * 2005-02-14 2006-08-17 Lane Michael T Hot-fillable blow molded container with pinch-grip vacuum panels

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805788A (en) * 1985-07-30 1989-02-21 Yoshino Kogyosho Co., Ltd. Container having collapse panels with longitudinally extending ribs
US4863046A (en) * 1987-12-24 1989-09-05 Continental Pet Technologies, Inc. Hot fill container
KR0154098B1 (ko) * 1988-04-01 1999-02-18 요시노 야타로 2축 연신 블로우 성형한 병
US5054632A (en) * 1990-07-23 1991-10-08 Sewell Plastics, Inc. Hot fill container with enhanced label support
US5141120A (en) * 1991-03-01 1992-08-25 Hoover Universal, Inc. Hot fill plastic container with vacuum collapse pinch grip indentations
US5141121A (en) * 1991-03-18 1992-08-25 Hoover Universal, Inc. Hot fill plastic container with invertible vacuum collapse surfaces in the hand grips
US5092475A (en) * 1991-06-28 1992-03-03 Continental Pet Technologies, Inc. Reinforced and paneled hot fill container
GB2258209A (en) * 1991-07-30 1993-02-03 Sipa Spa Plastic bottle for containing either carbonated or non-carbonated beverages
US5178289A (en) * 1992-02-26 1993-01-12 Continental Pet Technologies, Inc. Panel design for a hot-fillable container
JP3135995B2 (ja) * 1992-08-21 2001-02-19 株式会社吉野工業所 ボトル
US5337909A (en) * 1993-02-12 1994-08-16 Hoover Universal, Inc. Hot fill plastic container having a radial reinforcement rib
US5341946A (en) * 1993-03-26 1994-08-30 Hoover Universal, Inc. Hot fill plastic container having reinforced pressure absorption panels
US5704503A (en) * 1994-10-28 1998-01-06 Continental Pet Technologies, Inc. Hot-fillable plastic container with tall and slender panel section
US6257433B1 (en) * 1998-06-12 2001-07-10 Graham Packaging Company, L.P. Grip dome container
US6044997A (en) * 1998-06-12 2000-04-04 Graham Packaging Company L. P. Grip dome container
JP4171558B2 (ja) * 1999-07-30 2008-10-22 株式会社吉野工業所 円筒状の耐熱性中空容器
EP1118724B1 (fr) * 2000-01-20 2004-11-17 Ikumi Ohta Bouchon pour bonde de vidange
DE60110793T2 (de) * 2000-05-22 2006-08-24 Amcor Ltd., Abbotsford Heißbefüllbarer geblasener Kunststoffbehälter
DE60039639D1 (de) * 2000-12-20 2008-09-04 Yoshino Kogyosho Co Ltd Aus kunstharz hergestellter behälter
US6830158B2 (en) * 2002-03-07 2004-12-14 Graham Packaging Company, L.P. Plastic container having depressed grip sections
US6932230B2 (en) * 2003-08-15 2005-08-23 Plastipak Packaging, Inc. Hollow plastic bottle including vacuum panels
US7334695B2 (en) * 2003-09-10 2008-02-26 Graham Packaging Company, L.P. Deformation resistant panels
US7025219B2 (en) * 2003-10-31 2006-04-11 Graham Packaging Company, L.P. Multi-purpose grippable bell
US7080747B2 (en) * 2004-01-13 2006-07-25 Amcor Limited Lightweight container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6763969B1 (en) * 1999-05-11 2004-07-20 Graham Packaging Company, L.P. Blow molded bottle with unframed flex panels
US20040155008A1 (en) * 2003-02-10 2004-08-12 Lane Michael T. Inverting vacuum panels for a plastic container
US20060180568A1 (en) * 2005-02-14 2006-08-17 Lane Michael T Hot-fillable blow molded container with pinch-grip vacuum panels

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