NZ618924B2 - Plastic containers, base configurations for plastic containers, and systems, methods, and base molds thereof - Google Patents

Abstract

Disclosed is a hot-fillable, blow-molded plastic wide-mouth jar container package configured to be filled with a viscous food product at a temperature from 185°F to 205°F with a pressure relief feature to reduce bottle collapse once the hot-filled contents cool. The jar comprises a cylindrical sidewall, the sidewall being configured to support a wrap-around label; a wide-mouth finish projecting from an upper end of the sidewall via a shoulder, the finish being operative to receive a closure, and the shoulder defining an upper label stop above the sidewall. A base defines a lower label stop below the sidewall, wherein the base has a bottom end that includes a bearing portion defining ? standing surface for the jar, the base being smooth and without surface features from the bearing portion to the lower label stop. An up-stand wall extends upward and radially inward from the bearing portion; and a diaphragm is circumscribed by the up-stand wall in end view of the jar, the diaphragm having a plurality of concentric rings in spaced-apart relation with one another, and, in an as-formed, blow molded condition, the diaphragm is at an angle in the range of three to fourteen degrees downward from horizontal. The diaphragm is operative to move in response to pressure variation within the jar after the jar has been hot-filled with the product at the temperature from 185°F to 205°F and sealed with the closure, the pressure variation including increased pressure and decreased pressure. The increased pressure being headspace pressure associated with the hot filling with the product at the temperature from 185°F to 205°F and sealing the jar, and the decreased pressure being an internal vacuum associated with cooling of the hot-filled and sealed jar, the diaphragm being constructed and operative to move downward in response to the headspace pressure, and the diaphragm being constructed and operative to move upward in response to the vacuum. The diaphragm and the up-stand wall are constructed to be cooperatively operative to prevent the diaphragm from moving downward beyond a predetermined point of recovery for the diaphragm. all, the sidewall being configured to support a wrap-around label; a wide-mouth finish projecting from an upper end of the sidewall via a shoulder, the finish being operative to receive a closure, and the shoulder defining an upper label stop above the sidewall. A base defines a lower label stop below the sidewall, wherein the base has a bottom end that includes a bearing portion defining ? standing surface for the jar, the base being smooth and without surface features from the bearing portion to the lower label stop. An up-stand wall extends upward and radially inward from the bearing portion; and a diaphragm is circumscribed by the up-stand wall in end view of the jar, the diaphragm having a plurality of concentric rings in spaced-apart relation with one another, and, in an as-formed, blow molded condition, the diaphragm is at an angle in the range of three to fourteen degrees downward from horizontal. The diaphragm is operative to move in response to pressure variation within the jar after the jar has been hot-filled with the product at the temperature from 185°F to 205°F and sealed with the closure, the pressure variation including increased pressure and decreased pressure. The increased pressure being headspace pressure associated with the hot filling with the product at the temperature from 185°F to 205°F and sealing the jar, and the decreased pressure being an internal vacuum associated with cooling of the hot-filled and sealed jar, the diaphragm being constructed and operative to move downward in response to the headspace pressure, and the diaphragm being constructed and operative to move upward in response to the vacuum. The diaphragm and the up-stand wall are constructed to be cooperatively operative to prevent the diaphragm from moving downward beyond a predetermined point of recovery for the diaphragm.

Description

PLASTIC CONTAINERS, BASE CONFIGURATIONS FOR PLASTIC CONTAINERS, AND SYSTEMS, METHODS, AND BASE MOLDS THEREOF FIELD The disclosed subject matter relates to plastic ners, base urations for plastic containers, and systems, s, and base molds thereof.

In particular, the disclosed subject matter involves c containers having base portions constructed and operative to accommodate internal pressures within the container due to elevated temperature processing, such as hot—filling, pasteurization, and/or retort processing. Plastic containers according to embodiments of the disclosed subject matter can also be constructed and ive to accommodate internal pressures within the filled container resulting from subjecting the filIed plastic container to cooling or cool-down processing.

The Summary describes and identifies features of some embodiments.

It is presented as a ient summary of some embodiments, but not all. Further the Summary does not necessarily identify critical or essential features of the embodiments, inventions, or . ing to embodiments, a hot—fillable, blow-molded plastic wide— mouth jar ured to be filled with a viscous food product at a temperature from 185°F to 205°F, can comprise: a cylindrical sidewall being configured to support a wrap—around label; a wide-mouth finish projecting from an upper end of said sidewalI via a shoulder, said finish operative to receive a closure, and said shoulder defining an upper label stop above said sidewall; and a base defining a lower label stop below said sidewall. The base has a bottom end that includes: a bearing portion defining a standing surface for the jar, the base being smooth and without surface features from said bearing portion to said lower label stop; an up- stand wall which extends upward and radially inward from said bearing portion; and a diaphragm circumscribed by said up-stand wall in end view of the jar. The diaphragm has a plurality of concentric rings in spaced—apart relation with one another, and, in an as—formed, blow molded condition, is at an angle in the range of three to fourteen degrees rd from horizontal, and is operative to move in response to pressure variation within the jar after the jar has been hot-filled with the product at the temperature from 185°F to 205°F and sealed with the closure. The pressure variation includes increased pressure and sed pressure, separately, the increased pressure being headspace pressure associated with the hot-filling with the product at the temperature from 185°F to 205°F and g the jar, and the decreased pressure being an internal vacuum associated with cooling of the hot- filled and sealed jar. The diaphragm is ucted and operative to move downward in response to the headspace pressure. The diaphragm is also constructed and operative to move upward in response to the vacuum.

Embodiments also include a hot-fillable, blow—molded plastic wide— mouth jar configured to be filled with a viscous food product at a temperature from 185°F to 205°F that comprises: a cylindrical sidewall being ured to support a round label; a wide-mouth finish ting from an upper end of said sidewall via a shoulder, said finish ive to receive a e, and said shoulder defining an upper label stop above said sidewall; and a base defining a lower label stop below said ll. The base has a bottom end that includes: a bearing portion defining a standing surface for the jar, the base being smooth and without surface features from said bearing portion to said lower label stop; an stand wall which extends upward and radially inward from said bearing portion; and an inner wall having a single major radius and being circumscribed by said up—stand wall in an end view of the jar. The inner wall, in an med, blow molded condition, sloping downward and y outward, including a gate riser at a central longitudinal axis of the jar and a smooth portion without any surface features circumscribing the gate riser, and being operative to accommodate pressure variation within the jar after the jar has been lled with the product at the temperature from 185°F to 205°F and sealed with the closure. The pressure variation includes sed pressure and decreased pressure, separately, the increased pressure being headspace pressure associated with the hot—filling with the product at the temperature from 185°F to 205°F and sealing the jar, the decreased re being an internal vacuum associated with g of the lled and sealed jar. The inner wall resists and does not move downward in response to the increased re, and the inner wall is caused to move upward in response to the vacuum. in embodiments, a method comprises providing a blow-molded plastic container, the plastic container including a sidewall configured to t a film label, a finish projecting from an upper end of the sidewall and operative to cooperatively receive a closure to sealingly enclose the plastic container, and a base extending from the sidewall to form a bottom enclosed end of the plastic container, wherein the bottom end has a standing ring upon which the container may rest, a substantially stationary wall which extends aXiaIly upward and radially inward from the standing ring, and a movable wall, which, in its as—formed state, extends ly inward from the stationary wall toward a l longitudinal axis of the container, the movable wall also extending axially outward in its as-formed state. The method also can comprise hot-filling the plastic container via the finish with a product; sealing the hot- filled plastic container with the e; cooling the hot~filled and sealed plastic container; and compensating for an internal pressure characteristic after hot-filling and sealing the plastic container.

Embodiments also include a base mold to form a bottom end portion of a base of a plastic wide-mouth jar, the bottom end n of the plastic jar having a bottom bearing surface of the jar, a stationary wall ing upward from the bottom g surface, and an inner flexible wall arranged inwardly of the stationary wall, wherein the base mold comprises: a body portion; a bearing surface g portion to form a portion of the bottom bearing surface; a stationary wall forming portion to form the stationary wall; and an inner flexible wall forming portion to form the inner le wall. The inner flexible wall forming portion includes an upwardly protruding gate portion and a smooth portion without any surface features that circumscribes the gate n. Optionally, the base mold further includes a ridge forming portion between said stationary wall forming portion and said inner flexible wall g portion to form a ridge. ally, the smooth portion of the inner flexible wall forming portion includes a plurality of concentric grooves in spaced~apart relationship with one another, the grooves being to form concentric rings of the jar.

BRIEF PTION OF THE DRAWINGS Embodiments will after be described in detail below with reference to the accompanying drawings, wherein like reference ls represent like elements. The accompanying drawings have not necessarily been drawn to scale. Any values dimensions illustrated in the accompanying graphs and figures 2012/050251 are for illustration purposes only and may not represent actual or preferred values or dimensions. Where able, some features may not be illustrated to assist in the description of underlying features. is a side view of a plastic container according to embodiments of the disclosed subject matter. is a side view of another plastic container according to embodiments of the disclosed subject matter. is a cross section view of a base portion of a plastic container according to embodiments of the disclosed subject matter. is a bottom perspective view of the base portion of .

FIG. BC is a cross section view of the base portion of the ner of and a portion of a corresponding base mold according to embodiments of the disclosed t matter. is an operational illustration of the base portion of according to embodiments of the disclosed t matter. is a cross section view of another embodiment of a base portion according to embodiments of the disclosed subject matter. is a cross section view of r embodiment of a base portion of a plastic container according to embodiments of the disclosed subject matter.

FIG. SB is a base mold according to embodiments of the disclosed subject matter.

FIGS. EBA-60 illustrate alternative base mold embodiments according to the disclosed subject matter. is a cross section view of a base portion of a c container ing to ments of the disclosed subject matter, similar to the base portion shown in but without a ridge portion. is a cross n view of a base portion of a c container according to embodiments of the disclosed t matter, similar to the base portion shown in but without a ridge portion. is a flow chart for a method according to embodiments of the disclosed subject matter.

DETAILED DESCRIPTION The detailed description set forth below in connection with the appended drawings is intended as a ption of various embodiments of the disclosed subject matter and is not intended to represent the only embodiments in which the disclosed subject matter may be practiced. The detailed description includes specific details for the purpose of providing a thorough tanding of the disclosed subject matter. However, it will be apparent to those skilled in the art that the disclosed subject matter may be practiced without these specific s. In some instances, well-known structures and components may be shown in block diagram form in order to avoid obscuring the concepts of the disclosed subject matter.

The disclosed subject matter involves plastic containers, base configurations for plastic ners, and systems, methods, and base molds thereof.

More particularly, the disclosed subject matter involves plastic containers having base portions that are constructed and operative to accommodate elevated temperature processing, such as hot-filling, pasteurization, and/or retort processing.

Plastic containers according to embodiments of the disclosed subject matter also may be ured and operative to accommodate al forces caused by post elevated temperature processing, such as temperature—induced forces from varying temperatures in transit to or in storage at a distributor (e.g., wholesale or retail vendor), for example, ged effects of the weight of the product stored therein over time, etc., and/or cooling ions (including exposure to ambient temperature) after or between elevated temperature processing.

Generally speaking, in s embodiments, a bottom end portion of the container can move in response to internal pressures within the ner when hot-filled and sealed, for instance. ally, the bottom end portion may be ucted and operative to move downwardly and axially outward in response to internal res, such as headspace pressure and/or under the weight of the product, and also to move upwardly and y inward in response to a ent internal pressure, such as an internal vacuum created within the container due to cooling or cooling processing of the container. Alternatively, the bottom end portion may be constructed and operative to resist movement in one direction, for example, a downward and axially outward direction in response to internal pressures (e.g., headspace pressure, product weight, etc.), but may be constructed and operative to move upward and axially inward in response to a different internal pressure, such as an internal vacuum created within the container due to cooling or g processing of the container.

Base portions of containers also may have an inner wall coupled to the bottom end portion of the container that is movable that may assist or accommodate movement or flexure of the movable bottom end portion. The inner wall can be oriented or arranged directly vertically from the standing or support portion of the container base, or it can be oriented or arranged substantially directly ally, angling or sloping radially , for ce. The inner wall can be constructed and operative to remain stationary during nt of the movable bottom end portion. Optionally, the inner wall may be constructed and operative to move or flex radially inward slightly during movement of the movable bottom end n.

Optionally, the inner wall may be constructed and operative to move or flex ly outward during movement of the movable bottom end portion.

Plastic containers according to ments of the disclosed subject matter can be of any suitable configuration. For example, embodiments may include jars, such as wide—mouth jars, and base configurations thereof. Embodiments may also include single serve ners, bottles, jugs, asymmetrical containers, or the like, and base configurations thereof. Thus, embodiments of the disclosed subject matter can be filled with and contain any suitable product including a fluent, semi— fluent, or viscous food product, such as applesauce, spaghetti sauce, relishes, baby foods, brine, jelly, and the like, or a non-food product such as water, tea, juice, isotonic drinks or the like.

Plastic ners according to embodiments of the disclosed subject matter can be of any suitable size. For example, ments include containers with internal volumes of 24 oz., 45 oz., 48 02., or 66 oz. Also, ner sizes can include single-serving and multiple-serving size containers. Further, embodiments can also include containers with mouth diameters of 38mm, 55mm or higher, for instance.

Hot—fill processing can include filling a product into the container at any temperature in a range of at or about 130° F to at or about 205° F or in a range of at or about 185° F to at or about 205° F. ally, the hot-fill temperature can be above 205° F. For example, a wide-mouth jar can be filled with a hot product at a temperature of at or about 205° F, such as 208° F. As another example, a - serve container, such as for an isotonic, can be filled with a hot product at a ature of 185° F or slightly below.

Plastic containers ing to embodiments of the disclosed subject matter can be capped or sealed using any suitable closure, such as a plastic or metallic threaded cap or lid, a foil seal, a lug closure, 3 plastic or metallic snap—fit lid or cap, etc.

Plastic containers according to ments of the disclosed subject matter can also optionally be ted to through processing, such as pasteurization and/or retort processing.

Pasteurization can involve heating a filled and sealed ner and/or the product therein to any temperature in the range of at or about 200° F to at or about 215° F or at or about 218° F for any time period at or about five minutes to at or about forty minutes, for instance. In various embodiments, a hot rain spray may be used to heat the container and its contents.

Retort sing for food products, for instance, can involve heating a filled and sealed container and/or the product therein to any temperature in the range of at or about 230° F to at or about 270° F for any time period at or about twenty minutes to at or about forty minutes, for instance. Overpressure also may be applied to the container by any suitable means, such as a pressure chamber. is a side view of a plastic container in the form of a blow—molded plastic wide-mouth jar 100 according to ments of the disclosed subject matter. Of course, plastic containers according to embodiments of the disclosed t matter are not limited to jars and can include other plastic containers, such as bottles, jugs, asymmetrical containers, or the like. Jar 100 is shown in in its empty condition, after blow—molding but before hot-filling and sealing with a closure, and in the e of any internal or external applied forces.

Jar 100 can be configured and operative to o elevated temperature processing, such as lling, pasteurization, and/or retort sing.

For example, jar 100 may receive a food product as described herein at an elevated temperature as described herein, such as at a temperature from 185°F to 205°F.

Jar 100 also can be constructed and operative to o cooling sing or cool-down operations. Jar 100 is further constructed and operative to accommodate or react in a certain manner to any of the aforementioned forces or pressures.

Jar 100 also may be subjected to forces caused by post hot-fill and cooling operations, such as temperature-induced forces from Varying temperatures in transit to or in storage at a distributor (e.g., wholesale or retail vendor), prolonged effects of the weight of the product stored therein over time, etc.

Jar 100 can include tubular sidewall 130, a threaded finish 110 operative to receive a threaded closure (e.g., a lid), a shoulder or dome 120, and a base 140. Threaded finish 110 can be a wide—mouth finish and may be of any suitable dimension. For instance, the wide-mouth finish may have a diameter of 55mm. Alternatively, finish 110 may not be threaded, and another form of a closure may be implemented.

Jar 100 also may have upper and lower label bumpers or stops 121, 131. Label s 121, 131 may define a label area n which a label, such as a wrap-around label, can be affixed to sidewall 130. Optionally, sidewall 130 may include a plurality of concentric ribs or rings 135, circumscribing the sidewall 130 horizontally. Ribs 135 may be provided in order to reinforce the sidewall 130 and to resist or prevent paneling, denting, barreling, ovalization, and/or other unwanted ation of the sidewall 130, for e, in response to elevated temperature and/or cooling processing. Not explicitly shown, one or more supplemental vacuum panels may be located on the dome 120 in order to prevent unwanted deformation of sidewall 130. Thus, the one or more supplemental vacuum panels may take up a portion of in induced vacuum caused by g a filled and sealed jar 100, and, as will be discussed in more detail below, an inner wall may flex or move to take up or remove a second portion of the induced vacuum. is a side view of another plastic ner in the form of a jar 200 according to embodiments of the disclosed subject matter. As can be seen, jar 200 is similar to jar 100, but without ribs 135 in its sidewall 230. Upper and lower label bumpers or stops 121, 131 are shown more pronounced in however, their dimensions in relation to sidewall 230 may be similar to or the same as shown in the jar 100 of Additionally, jar 200 also may include one or more supplemental vacuum panels. Such one or more supplemental vacuum panels may be d on the dome 120 and/or in the sidewall 230 and/or between bumper stop 131 and the bottom standing support formed by the base 140. Accordingly, as with the one or more supplemental vacuum panels mentioned above forjar 100, the one or more mental vacuum panels may take up a portion of in induced vacuum caused by cooling a filled and sealed jar 200, and an inner wall may flex or move to take up or remove a second portion of the induced vacuum.

FIGS. 3A—BD show views of base 140, and, in ular, a bottom end thereof, with being a cross section view of base 140, FIG. BB being a bottom perspective view of base 140, being a cross section view of base 140 with a base mold portion 500A, and being a basic operational illustration of a manner in which the base can be constructed to operate.

Generally speaking, the bottom end of the base 140 is constructed and ive to be responsive to elevated temperature processing, such as during and after hot-filling and g and optionally during pasteurization and/or retort processing. The bottom end may also be ted to forces caused by post hot-fill and cooling operations, such as temperature-induced forces from varying atures in transit to or in storage at a butor (e.g., wholesale or retail vendor), prolonged s of the weight of the product stored therein over time, etc, and can accommodate such forces, such as by preventing a portion of the bottom end from setting and/or moving to a non-recoverable position.

The bottom end of base 140 includes a g portion 142, for example, a standing ring, which can define a bearing or standing surface of the jar.

Optionally, the base 140 can be smooth and without surface features from bearing portion 142 to lower label bumper or stop 131.

The bottom end also can include an up-stand wall 144 and an inner wall 148. Up—stand wall 144 can extend upward from bearing portion 142. In the embodiment shown in FIGS. 3A through 3D, up-stand wall 144 extends from bearing portion 142 axially upward and radially inward. However, optionally, up—stand wall 144 may extend only axially upward without extending radially inward. As yet another option, up—stand wall 144 may extend axially upward and slightly radially outward.

The "dashed" line in tes that up—stand wall 144 can be of any suitable configuration. For example, in various ments, up-stand wall 144 can have a geometry in the form of a stacked ring or rib configuration, for instance, where any le number of rings or ribs can be stacked, such as two, three, four, or five. The rings can be stacked directly vertically on top of one another, or may taper radially inward with each successive ring. Alternatively, only one ring may be implemented. Such use of up-stand ry, and in particular, stacked ring configurations may provide the ability to use relatively less material to form a jar, while providing desired jar characteristics, such as the jar’s ability to compensate for internal pressure variations due to elevated temperature and/or cooling sing.

In s embodiments, up~stand wall 144 can be as described in U.S. Application No. 13/210,350 filed on August 15, 2011, the entire content of which is hereby incorporated by reference into the present ation. in r embodiment, up~ stand wall 144 can include a ity of ribs or braces extending partially or fully along the length of the up-stand wall or around its circumference.

Inner wall 148 can be circumscribed by the up-stand wall 144 in end view of the container, and the inner wall 148 and up-stand wall 144 can be cooperatively operative so as to accommodate or be responsive to pressure variation within the jar after the jar has been hot-filled with a t at a filling temperature as described herein and sealed with an enclosure (8.9., a threaded lid). inner wall 148 also can accommodate or be responsive to pressure variation within the jar in response to cooling of the jar. Further, inner wall 148 can accommodate or be responsive to pressure variation within the jar in response to pasteurization and/or retort processing.

In s embodiments, inner wall 148 may be characterized as a diaphragm that can move or flex upward and downward in se to pressure variations within the jar. For example, inner wall 148 may move downward due to headspace pressure caused by hot—filling and sealing the jar. Movement upward may be due to an induced vacuum within the jar as the hot-filled and sealed jar and its contents cool.

As indicated in and shown by the dashed lines in , inner wall 148 can move upward and rd by an angle 6 in response to pressure variations within the jar. The angle 9 is merely diagrammatic and can represent any suitable angle, entirely above an initial, blow molded position of the inner wall 148, entirely below an initial blow molded position of the inner wall 148, or both above and below an initial blow molded position of the inner wall 148. In various embodiments, inner wall 148 is at or above the g surface at all times during its movement (e.g., downward movement).

Inner wall 148 can include a plurality of concentric rings 150A, 1508.

In various embodiments, rings 150A, 1508 can be in —apart relationship with one another. Further, though FIGS. 3A—3D show two rings, any suitable number may be implemented, including one, three, or four, for instance. Further, rings 150A, 1508 can be of any suitable uration, for e, having an outer surface and/or an inner surface that is convex. Incidentally, FIGS. 3A through 4 show the outer surface of the rings 150A, 1508 being convex. Optionally or alternatively, in various embodiments, an interior and/or an exterior surface of one or more of the rings may be concave. Rings 150A,,15OB also may be irregular or non— uniform (e.g., thicker, thinner, or discontinuous at certain portions). In another embodiment, tric rings may be replaced by radially outward extending ribs or braces that can extend fully or partially from the center of the jar to the up-stand wall 144 or to the bearing portion 142. Additionally, some or aII of the rings may be of similar configuration or differing configurations.

Rings 150A, 1508 can be operative to control the extent to which the inner wall 148 may flex rd. Rings 150A, 1508 can be constructed and operative to prevent inner wall 148 from moving downward past a predetermined downward limit, for example, beyond a point of recovery. Optionally, rings 150A, 1508 may assist inner wall 148 move back upward, for example to the initial blow molded position of the inner wall 148 or, for example, above the initial blow molded position. Such movement above the initial blow molded position may relieve some or all of an induced vacuum and even create a positive pressure within the jar. In the case where not all of the vacuum is relieved, the jar may have one or more supplemental vacuum panels ed somewhere other than the bottom end portion of the jar to reduce the remainder of the vacuum. In various embodiments, nt upward of inner wall 148 can occur without the aide of anything other than the configuration and design of the jar , particularly the bottom end portion, and an induced vacuum in the filled and sealed jar. Optionally, a mechanical force, such as a rod and or, may be used to move upward the inner wall 148.

In various ments, up—stand wall 144 can extend from bearing portion 142 axially upward to an apex f. As shown in , the apex of up- stand wall 144 can be a ridge or rim 146 that is circular in end view of the jar. From the top of ridge 146, there may be a relatively sharp drop off to an inner wall 148.

From the bottom of the drop off, the inner wall 148 may extend horizontally, downward (e.g., by an angle (D), or at a subtle radius downward or upward.

Optionally, there may be no ridge and the top of the up-stand wall 144, and the up— stand wall can transition gradually or sharply horizontally, tangentially, downward, or at a subtle radius downward or upward to inner wall 148. shows, is a cross section, another example of a base portion according to embodiments of the disclosed t matter without a ridge, with item 146 now representing a horizontal transition from nd wall 144 to inner wall 148. Of course, in embodiments, the inner wall 148 may extend downward by an angle CD.

Thus, inner wall 148 can be formed at a decline (ridge 146 or no ridge) with respect to horizontal, represented by angle CD. Angle CD can be any suitable angle. In various embodiments, angle (D can be 3,° 8°, 10° any angle from 3° to 12°, from 3° to 14°, from 8° to 12°, or from 8° to 14°. Alternatively, as indicated above, inner wall 148 may not be at an angle, and may horizontally extend, or, inner wall 148 may be at an incline with respect to horizontal in its as-formed state. shows an alternative embodiment, whereby ring 150A is larger than ring 1508. For e, ring 150A can project downward and outward more than does ring 150B. The alternative may also be true — i.e., in alternative embodiments, ring 150B may be larger than ring 150A. Rings 150A, 150B, optionally or alternatively, may be constructed and operative to tate movement back up of inner wall 148.

Optionally, inner wall 148 also can have a nose cone 152 with a gate 154, which may be used for injection of plastic when blow molding the jar. In various embodiments, nose cone 152 may serve as an nverting n that is constructed and ive to move downward in response to the increased pressure and/or upward in response to the decreased pressure without deforming or without substantially deforming as it moves upward and/or downward with the inner wall 148.

Thus, as indicated above, the inner wall 148 may move rd from its as-formed position and then upward. In various embodiments, the inner wall 148 may move back up to its initial position. Optionally, inner wall 148 may move back up to a position above its initial position, for example, to a position above horizontal or a on above horizontal.

In various embodiments, the inner wall 148 can flex in response to the re variation with the jar after the jar has been hot—filled with a product at a g temperature as described herein and sealed with an enclosure. For ce, referring again to FlG. 3D, inner wall 148 may flex downward as shown by dashed line 148(1) in response to an al pressure P(1). lnternal pressure P(1) may be caused by elevated temperature of a hot product being filled into the jar and then the jar being sealed, for example (i.e., headspace pressure). Internal pressure P(1) also may be caused by elevated temperature of a product upon pasteurization or retort processing of the filled and sealed ner at an elevated temperature. Optionally, inner wall 148 can be constructed so that it is at or above a horizontal plane running through the bearing surface at all times during the downward flexing of the inner wall 148.

Optionally or alternatively, inner wall 148 may flex upward as shown by dashed line 148(2) in response to an internal pressure P(2) (which is shown outside the jar in but can be representative of a force caused by an internal vacuum d by cooling a hot-filled product). In various embodiments, up-stand wall 144 may be configured and operative to withstand movement as the inner wall 148 flexes in response to the pressures within the jar after the jar has been filled and sealed with a closure. is a cross section view of another embodiment of a base portion of a plastic container according to the disclosed subject matter. is a base mold according to embodiments of the disclosed subject matter that may be used to mold at least the inner wall 148 of the base of or a variation f.

The base portion shown in FIG. SA has an inner wall 148 that is differently configured and which operates differently from the inner wall shown in FIGS. 3A through 3D, 4, and 7A. Also note that in , nd wall 144 is shown as being without rings. r, the dashed lines in for up-stand wall 144 indicate that the up-stand wall 144 can be of any suitable configuration, such as described above for FIGS. 3A through 3D or as shown in .

The base portion shown in also includes another wall 146 which extends from an apex 145 of the up-stand wall 144 downward and radially inward to meet inner wall 148 to form a ridge or rim that is circular in end view of the jar. As shown in , wall 146 forms a relatively sharp drop off from apex 145 to inner wall 148. Optionally, there may be no ridge and the top of the up-stand wall 144, and the up-stand wall 144 can transition gradually horizontally, tangentially, or at a subtle radius rd or upward to inner wall 148. shows, is a cross section, another example of a base portion ing to ments of the disclosed subject matter without a ridge, with item 146 now representing a horizontal or subtle radius downward transition from up-stand wall 144 to inner wall 148.

Optionally, inner wall 148 can be curved axially d along a single major radius or parabolic.

A gate riser (i.e., nose cone 152 with a gate 154) may be located at a central longitudinal axis of the jar. The gate riser can be a relatively rigid portion that is constructed and operative to move upward in response to the decreased re without deforming. The inner wall 148 can have a smooth portion without surface features circumscribing the gate riser, and the smooth portion can extend from the gate riser to the wall 146 or up—stand wall 144 (in the case of an embodiment with no ridge or apex 145). Optionally or alternatively, a slight step or transition portion may be implemented in the inner wall 148. In various embodiments, the smooth portion of the inner wall 148 can have a substantially m thickness and may be t any heavy spots.

Inner wall 148 can accommodate pressure variation within the jar after the jar has been hot-filled with the t at the temperature from 185°F to 205°F, for instance, and sealed with a e. The pressure variation can include sed pressure and decreased re, separately. For instance, increased pressure can include headspace pressure associated with the hot-filling with the product at the temperature from 185°F to 205°F and sealing the jar, internal pressure associated with pasteurization, or internal pressure associated with retort processing. Decreased pressure can include an internal vacuum associated with g of the filled and sealed jar. lnner wall 148 can resist movement downward in response to the increased pressure. Further, the uration of the end of the base portion, and, in particular, the inner wall 148 is such that the bottom end of the base portion is prevented from taking set. . [0060] Additionally, inner wall 148 can move upward in response to the decrease in pressure (i.e., the vacuum), for example, by an angle theta 9. ntally, the angle theta 9 shown in and 78 may not be the same as the angle theta 6 shown for . Alternatively, the angles may be the same. In various embodiments, movement upward of the inner wall 148 can cause the inner wall 148 to invert. Upward movement of the inner wall 148 may reduce a portion of an induced al vacuum. The portion of the vacuum can be the entire portion or less than the entire portion. Further, an overpressure in the jar may be created due to movement upward of the inner wall 148. In the case where not all of the vacuum is reduced, one or more supplemental vacuum panels arranged ere other than the bottom end portion of the jar may be used to reduce the remainder of the vacuum. Optionally, a mechanical apparatus, such as a rod end movable via an actuator, can be used to move the inner wall 148 upward or assist with movement of the inner wall 148 upward. In various embodiments, inner wall 148 may move upward an amount based on the pull of the vacuum, and a mechanical apparatus may be used to push up the inner wall 148. is a base mold to form a bottom end portion of a base of a c container according to embodiments of the disclosed t matter. The base mold shown in can include a body portion, a bearing surface forming portion to form a portion of the bottom bearing surface, an up-stand wall forming n, and an inner wall forming portion 558. In various embodiments, the base mold shown in can be used to form the base portions shown in , FIG 7B, or a ion thereof, wherein one variation thereof can include an up-stand wall 144 having a slight break or transition at a point along its length whereby it transitions from one angle upward (and possibly ly inward) to another angle upward and radially inward.

FIGS. 6A—6C show alternative base mold embodiments 600A-600C and tive up-stand wall geometries 644A-644C ing to the disclosed subject matter for forming base portions similar in operation to those shown in and 78. FIGS. 6A-6C illustrate inner wall forming portions of the molds 6008 and 600C that smooth faces to form respective inner walls that are smooth and t any transitions in their body. The base mold 600A on the other hand has an inner wall forming portion that has two distinct portions 648, 650 and a slight transition or step down from portion 650 ly inward to portion 648 to form a corresponding inner wall. is a flow chart for a method 800 according to embodiments of the disclosed subject matter.

Methods according to embodiments of the disclosed subject matter can include providing a plastic container as set forth herein (8802). Providing a plastic container can include blow molding or othenNise forming the container. Providing a plastic container also can include packaging, shipping, and/or delivery of a container.

Methods can also include filling, for example, lling the container with a product such as described herein, at a temperature as described herein (S804). After filling, the ner can be sealed with a e such as described herein (8806). After sealing filling and sealing the container, a base portion of the container can accommodate or act in response to an internal pressure or force in the filled and sealed container such as described herein (8808). As ted above, internal re within the sealed and filled container can be caused by hot-filling the container, pasteurization processing to the container, retort processing to the container, or cooling processing to the container. The container base portion can odate or act responsively as set forth herein based on the internal pressure or force and the particular configuration and construction of the base portion as set forth herein.

Though containers in the form of wide—mouth jars have been particularly discussed above and shown in various figures, embodiments of the disclosed t matter are not limited to wide-mouth jars and can include plastic containers of any suitable shape or configuration and for any suitable use, including s, jugs, asymmetrical containers, single—serve containers or the like. Also, embodiments of the sed subject matter shown in the drawings have ar cross-sectional shapes with reference to a central longitudinal axis. However, embodiments of the disclosed subject matter are not limited to containers having circular cross ns and thus container cross sections can be square, rectangular oval, or asymmetrical. r, as indicated above, hot-filling below 185°F (e.g., 180°F) or above 205°F is also embodied in aspects of the disclosed subject matter.

Pasteurizing and/or retort temperatures above 185°, above 200°F, or above 205°F (e.g., 215°F) are also embodied in aspects of the disclosed subject matter.

Containers, as set forth according to embodiments of the disclosed subject matter, can be mode of a thermoplastic made in any suitable way, for example, blow molded ding ion) PET, PEN, or blends thereof. Optionally, ners according to embodiments of the disclosed subject matter can be multilayered, including a layer of gas barrier material, a layer of scrap material, and/or a polyester resin modified for ultra-violet ("UV") light protection or resistance.

Having now described embodiments of the disclosed subject matter, it should be apparent to those skilled in the art that the foregoing is merely illustrative and not ng, having been presented by way of example only. Thus, although particular configurations have been discussed herein, other configurations can also be employed. Numerous modifications and other embodiments (e.g., combinations, rearrangements, etc.) are enabled by the present disclosure and are within the scope of one of ordinary skill in the art and are contemplated as falling within the scope of the disclosed t matter and any equivalents thereto. Features of the disclosed embodiments can be combined, rearranged, d, etc., within the scope of the invention to produce additional ments. Furthermore, n features may sometimes be used to advantage without a corresponding use of other features.

Accordingly, Applicants intend to embrace all such alternatives, modifications, equivalents, and variations that are within the spirit and scope of the t invention.

Claims (41)

1. А hot-fillable, blow-molded plastic wide-mouth jar ured to be filled with a viscous food product at a temperature from 185°F to 205°F, the jar comprising: a cylindrical sidewall, said sidewall being configured to support a wrap-around label; a wide-mouth finish projecting from an upper end of said sidewall via a shoulder, said finish being operative to receive a closure, and said shoulder defining an upper label stop above said sidewall; and a base defining a lower label stop below said sidewall, wherein said base has a bottom end that es: a bearing portion defining а standing surface for the jar, the base being smooth and without surface features from said bearing portion to said lower label stop; an up-stand wall which extends upward and radially inward from said bearing portion; and a diaphragm circumscribed by said nd wall in end view of the jar, said diaphragm having a plurality of concentric rings in spaced-apart relation with one another, and, in an asformed , blow molded condition, said diaphragm is at an angle in the range of three to fourteen degrees downward from horizontal, said diaphragm is ive to move in response to pressure variation within the jar after the jar has been hot-filled with the t at the temperature from 185°F to 205°F and sealed with the e, the pressure variation including increased re and decreased re, tely, the increased pressure being headspace pressure associated with the hot filling with the product at the temperature from 185°F to 205°F and sealing the jar, and the decreased pressure being an internal vacuum associated with cooling of the hot-filled and sealed jar, said diaphragm being constructed and operative to move downward in se to the headspace pressure, and said diaphragm being constructed and operative to move upward in response to the vacuum, wherein said diaphragm and said up-stand wall are constructed to be cooperatively operative to prevent said diaphragm from moving downward beyond a predetermined point of recovery for said agm. Active 21385327.1 24

2. The jar according to Claim 1, wherein the pressure variation includes increased pressure associated with one or more of pasteurization processing and retort processing of the jar when filled and sealed with the e.

3. The jar according to Claim 1, n said diaphragm is constructed so as to be at or above the bearing surface at all times during the downward movement thereof.

4. The jar according to Claim 1, wherein the upward movement of said diaphragm reduces a portion of the vacuum less than the entire amount of the vacuum.

5. The jar according to Claim 4, wherein the jar further comprises a supplemental vacuum panel arranged somewhere other than the bottom end portion of the jar, and the supplemental vacuum panel reduces another portion of the vacuum.

6. The jar according to Claim 1, wherein the upward movement of said diaphragm reduces the entire portion of the vacuum.

7. The jar ing to Claim 6, wherein the upward movement of said agm creates a positive pressure within the jar.

8. The jar according to Claim 1, wherein said diaphragm includes an anti inverting portion at a central longitudinal axis of the jar, said anti inverting portion being constructed and operative to move rd in response to the increased pressure and upward in response to the decreased pressure without ing.

9. The jar according to Claim 1, wherein the hot-fill temperature is from 200°F to 205°F.

10. The jar according to Claim 1, wherein the plastic jar has a composition of up to 22.5% d plastic.

11. The jar ing to Claim 1, wherein said diaphragm and said up-stand wall are constructed to be cooperatively operative such that the agm moves back up after downward movement thereof to a position at or above its initial, as-formed position.

12. The jar according to Claim 11, wherein the position above its initial position is a on above the horizontal. Active 21385327.1 25

13. The jar according to Claim 1, wherein each said concentric ring has one or more of an outer surface that is convex and an inner surface that is convex, as defined with respect to the exterior and interior of the jar, respectively.

14. The jar according to Claim 1, wherein said up-stand wall is ucted and operative to remain substantially stationary during one or more of upward movement and downward movement of said diaphragm.

15. The jar according to Claim 1, wherein each said concentric ring has an inner surface that is concave, with inner being d in terms of an inside inner volume of the jar.

16. The jar according to Claim 1, wherein a first concentric ring of said plurality ts downward and outward more than does a second concentric ring of said plurality.

17. The jar according to Claim 1, wherein said plurality of concentric rings are constructed and operative to prevent said diaphragm from moving downward beyond а predetermined point of recovery for said diaphragm and to facilitate movement back up of said diaphragm.

18. А hot-fillable, blow-molded plastic wide-mouth jar configured to be filled with a s food product at а temperature from 185°F to 205°F, the jar comprising: а cylindrical ll, said sidewall being configured to support a wrap-around label; a wide-mouth finish projecting from an upper end of said sidewall via a shoulder, said finish being operative to e а closure, and said er ng an upper label stop above said sidewall; and а base defining a lower label stop below said sidewall, wherein said base has a bottom end that includes: a bearing portion ng а standing surface for the jar, the base being smooth and without surface features from said bearing portion to said lower label stop; an up-stand wall which extends upward and ly inward from said bearing portion; an inner wall having a single major radius and being circumscribed by said up-stand wall in an end view of the jar, said inner wall, in an as-formed, blow molded condition, sloping downward and axially outward, said inner wall including a gate riser at a central longitudinal axis of the jar and a smooth portion t any surface features circumscribing the gate riser, said Active 21385327.1 26 inner wall being ive to accommodate pressure variation within the jar after the jar has been hot-filled with the product at the temperature from 185°F to 205°F and sealed with the closure, the pressure variation includes increased pressure and decreased pressure, tely, the increased pressure being headspace pressure associated with the hot-filling with the product at the temperature from 185°F to 205°F and sealing the jar, and the decreased pressure being an al vacuum associated with cooling of the hot-filled and sealed jar, wherein said inner wall resists and does not move downward in se to the increased pressure, and wherein said inner wall is caused to move upward in response to the vacuum.

19. The jar according to Claim 18, wherein the pressure variation includes increased re associated with one or more of pasteurization processing and retort processing of the jar when filled and sealed with the closure.

20. The jar according to Claim 18, wherein said up-stand wall extends upward and radially inward from said bearing portion to an apex, a transition wall is between the apex and said inner wall, said transition wall extending downward and radially inward from the apex, and the smooth portion extends from said gate riser to said transition wall.

21. The jar according to Claim 20, wherein the smooth portion has a step prior to reaching said transition wall.

22. The jar according to Claim 18, wherein said inner wall is entirely smooth from said gate riser to a top portion of said up-stand wall, the smooth portion having a substantially uniform thickness and being without any heavy spots.

23. The jar ing to Claim 18, wherein said up-stand wall is ucted and operative to remain substantially stationary during upward movement of said inner wall.

24. The jar ing to Claim 18, wherein the movement upward of said inner wall occurs until said inner wall is inverted.

25. The jar ing to Claim 18, n the single major radius of said inner wall extends from at or about said up-stand wall inward to said gate riser. Active 21385327.1 27

26. The jar according to Claim 18, wherein said bottom end of said base is ucted and operative to prevent said inner wall from taking set.

27. The jar according to Claim 18, wherein said inner wall is constructed so as to be at or above the bearing surface at all times during its movement.

28. The jar according to Claim 18, wherein the upward movement of said inner wall occurs without a mechanical apparatus acting on an outside of said inner wall and reduces a portion of the vacuum less than the entire portion of the entire vacuum.

29. The jar according to Claim 18, wherein the jar further includes a supplemental vacuum panel arranged somewhere other than the bottom end portion of the jar and reduces the remainder of the vacuum.

30. The jar according to Claim 18, n the gate riser is constructed and operative to move upward in response to the decreased pressure without deforming.

31. The jar according to Claim 18, wherein said inner wall moves upward to a position above its initial on, the on above its initial position being above the horizontal.

32. А method comprising: providing a blow-molded plastic container, the c container including a sidewall configured to support a film label, a finish projecting from an upper end of the sidewall and operative to cooperatively receive a closure to sealingly enclose the plastic container, and a base extending from the sidewall to form a bottom enclosed end of the plastic container, wherein the bottom end has a standing ring upon which the ner may rest, a substantially stationary wall which s axially upward and radially inward from the standing ring, and a movable wall, which, in its as-formed state, extends radially inward from the stationary wall toward a central longitudinal axis of the container, the movable wall also ing axially outward in its as-formed state; hot-filling the plastic container via the finish with a product; sealing the lled plastic ner with the closure; cooling the hot-filled and sealed plastic ner; and Active 21385327.1 28 compensating for an internal pressure characteristic after hot-filling and sealing the plastic container, wherein the plastic container is a wide-mouth jar, wherein a temperature of the lled product upon g is from 185°F to 205°F, wherein the movable wall has a single major , and prior to said hot-filling, the movable wall slopes rd and axially outward and includes a nose cone at a central longitudinal axis of the jar and a smooth portion without any surface features circumscribing the nose cone, and wherein said compensating for an internal pressure characteristic after hot-filling and sealing the c ner further includes substantial non-movement by the movable wall in response to an overpressure d in the hot-filled and sealed jar, and movement of the movable wall y inward in response to a vacuum created by said cooling, said movement axially inward ng the vacuum.

33. The method of Claim 32, wherein the movable wall extends from the stationary wall radially inward and outward and by an angle of three to fourteen degrees below horizontal.

34. The method of Claim 32, further sing: blow molding the plastic container using a mold comprised of a base mold that forms the stationary wall and the movable wall; and conveying the plastic container with its standing ring resting on a flat surface during said compensating.

35. The method of Claim 32, further comprising: performing one or more of pasteurization and retort processing to the filled and sealed container.

36. The method of Claim 32, wherein, prior to said blow molding, a radius size of the single major radius is set for said blow molding the container based on the fluent or semi-fluent food product to be hot-filled into the container.

37. А method comprising: Active 21385327.1 29 providing a blow-molded plastic ner, the plastic container ing a sidewall configured to support a film label, a finish projecting from an upper end of the sidewall and operative to cooperatively receive a closure to sealingly enclose the c container, and a base extending from the sidewall to form a bottom enclosed end of the plastic container, wherein the bottom end has a standing ring upon which the container may rest, a substantially stationary wall which extends axially upward and radially inward from the standing ring, and a movable wall, which, in its as-formed state, extends radially inward from the stationary wall toward a central longitudinal axis of the container, the movable wall also extending axially outward in its as-formed state; hot-filling the plastic container via the finish with a product; sealing the hot-filled plastic container with the closure; cooling the hot-filled and sealed plastic container; and compensating for an internal pressure characteristic after hot-filling and sealing the plastic container, wherein the stationary wall is comprised of a plurality of stacked rings of differing circumferences ing upward from the ng ring.

38. The method of claim 37, wherein the moveable wall extends from the stationary wall ly inward and d and by an angle of three to fourteen degrees below horizontal.

39. The method of Claim 37, further sing: blow molding the plastic container using a mold comprised of a base mold that forms the stationary wall and the movable wall; and conveying the plastic container with its ng ring resting on a flat surface during said sating.

40. The method of Claim 37, further comprising: performing one or more of pasteurization and retort processing to the filled and sealed container.

41. The method of claim 37, n, prior to said blow molding, a radius size of the single major radius is set for said blow molding the container based on the fluent or semi-fluent food product to be hot-filled into the container. Active 21385327.1 30