Abstract: A synthetic resin-made laminated peelable container, formed by blow molding a preform assembly in which an inner preform is assembled into an outer preform, includes: an outer layer body including a tubular-shaped outer mouth and a closed-bottom tubular-shaped trunk contiguous from the outer mouth; an inner layer body including a tubular-shaped inner mouth arranged on inner side of the outer mouth and a containing chamber laminated on inner surface of the trunk in peelable manner for volume reduction and deformation; and an ambient air inlet configured to introduce ambient air between the outer and inner layer bodies. The containing chamber is integrally provided with at least two thick ribs extending along axis line of the trunk to increase thickness of the containing chamber compared with remaining portions.

Abstract: A bottle includes a bottom portion which includes a bottom wall portion with a grounding portion located at an outer circumferential edge thereof, and a tubular heel portion extending upward from an outer circumferential edge of the grounding portion, in which the bottom wall portion includes an inner circumferential wall portion extending upward from an inner circumferential edge of the grounding portion, and a recessed wall portion extending inward in a radial direction from an upper end of the inner circumferential wall portion, a plurality of concave portions or a plurality of convex portions are formed on the inner circumferential wall portion over the entire circumference, and the plurality of concave portions or the plurality of convex portions are located at a portion in the inner circumferential wall portion including at least a lower end edge of the inner circumferential wall portion.

Abstract: A synthetic resin container has an outer layer body and an inner layer body and formed by biaxial stretching blow molding. The synthetic resin container has a cylindrical mouth portion, a shoulder portion located below the mouth portion and having a diameter gradually increasing downward, a body portion being continuous with a lower end of the shoulder portion, and a bottom portion configured to close a lower end of the body portion. The mouth portion has an outside air introduction port configured to introduce outside air between the outer layer body and the inner layer body, and the shoulder portion has at least one shoulder rib forming a concave or convex shape and extending from the mouth portion side to the body portion side.

Abstract: According to the present invention, there is provided a bottle formed of a synthetic resin material in a cylindrical shape with a bottom, the bottle includes a bottom portion which includes a bottom wall portion and a heel portion, in which the bottom wall portion includes an inner peripheral wall portion and a depressed wall portion, a plurality of concave portions are formed on the inner peripheral wall portion, the plurality of concave portions are located on the inner peripheral wall portion at least in a portion including a lower end edge of the inner peripheral wall portion, a plurality of convex portions are formed at a connecting portion between the inner peripheral wall portion and the depressed wall portion, and the plurality of concave portions and the plurality of convex portions are provided alternately in the circumferential direction.

Abstract: A synthetic resin laminated container formed by extrusion blow molding into a bottle shape having a plurality of layers and including a mouth, a body and a bottom, wherein: the bottom has a grounding portion, a bottom wall portion provided inside the grounding portion and recessed inward the container with respect to the grounding portion, and a pinch-off portion having a protrusion thread shape protruding from a bottom surface that faces downward the bottom wall portion and both ends thereof in a longitudinal direction each is continuous to the grounding portion; the bottom surface is a flat surface; and an innermost layer is a polyester resin layer.

Abstract: A fluid medical waste canister has interior surfaces that are exposed only to compressive stresses when a vacuum is applied, thereby eliminating the potential for environmental stress cracking. The canister is compatible with medical procedures that generate fluids having high fat/lipid content, such as liposuction procedures. The canister avoids certain stress concentration distributions that cause cracks to close onto themselves, which can cause one or more pieces of the canister wall to rupture into its interior volume. Because the canister is designed to avoid conditions that initiate canister implosion during liposuction procedures, low-cost polystyrene may be used as a waste canister material for such procedures.

Abstract: A non-round plastic container includes an upper portion, a sidewall portion, and a base portion. The upper portion includes an opening and the sidewall portion extends downwardly from the upper portion, and the base portion extends downwardly from the sidewall portion. In embodiments, the sidewall portion includes a front surface, a rear surface, and opposing side surfaces disposed between the front surface and the rear surface, and the front surface, rear surface, and opposing side surfaces each include a flat configured to contact a flat on an opposing surface associated with a similar container. In embodiments, the opposing sides may have a substantially straight or a curved/tapered configurations, and/or one or more surface of the container may include one or more reinforcing formations. In embodiments, the container has a substantially oval or ovaloid shape.

Abstract: A preform for a container has a hollow cylindrical main body having a first thickness, a hollow cylindrical thick portion having a second thickness greater than the first thickness, and a curved end portion. Inner surfaces of the main body, the thick portion, and the end portion form a cavity.

Abstract: A preform 20 comprises a neck portion 22 having an opening 21, a cylindrical barrel portion 23, and a bottom portion 24 larger in diameter than the barrel portion 23, and has a corner portion 25 at a boundary between the barrel portion 23 and the bottom portion 24.

Abstract: This disclosure provides new methods to characterize and relate residual stress and orientation imparted to the injection molded polymeric preform with orientation and residual stress in the resulting blow molded bottle. The method developed allows one to define and map the coupled thermal stress histories of both processes to define applicable preferred mutual processing windows for both preform and bottle molding processes. Stretch blow-molding parameters are developed using the disclosed method.

Abstract: A resin made container includes a spout portion to/from which a cap can be attached/detached, a shoulder portion continuous with the spout portion, a body portion continuous with shoulder portion and a bottom portion continuous with body portion and disposed at a lowermost portion of the bottle. Bottom portion includes a bottom face which comes into contact with a disposing surface and a sloped portion extending with a slope from the bottom face to the body portion. At least a portion of a vertical cross sectional shape of the sloped portion is a linear portion or a curved portion which protrudes to the inner side of the container. An angle formed between the linear portion of sloped portion and disposing surface or an angle formed between a straight line interconnecting an upper end and a lower end of the curved portion and disposing surface ranges from 15 to 70 degrees.

Abstract: Container having a body portion with sidewall defining outer perimeter and hollow interior. The body portion includes a plurality of continuous ribs extending about the outer perimeter of the sidewall, each rib having alternating horizontal segments and branched segments. Each branched segment includes a top branch and bottom branch joined at either end to define a bounded area therebetween. The plurality of continuous ribs includes at least a first continuous rib and second continuous rib spaced vertically from the first continuous rib. A midpoint of each branched segment of the first continuous rib is aligned along a vertical axis with a midpoint of a corresponding horizontal segment of the second continuous rib, and a midpoint of each horizontal segment of the first continuous rib is aligned along a vertical axis with a midpoint of a corresponding branched segment of the second continuous rib.

Abstract: A container including a body having a base defining a closed end, a finish defining an opposite open end, and a sidewall between the base and finish. The base includes a support surface defining a reference plane and a contoured base recess extending inwardly from the support surface to a maximum base recess height “hbrmax” from the plane. The sidewall includes a concave rib extending circumferentially around the body. A center of the rib is disposed at a rib height “hr” from the plane. The ratio “hbrmax:hr” is between 1:3 and 1:5. The rib includes a radiused transition surface extending from the base to an angled inner surface and having a radius of curvature “r1” of at least 0.10 inches. The angled inner surface has an angle “a” relative to the plane of between 28 and 80 degrees. A method and mold assembly for making the container are also provided.

Abstract: A glass container for packaging a pharmaceutical composition including a glass tube with a first end and a second end, the glass tube having a wall thickness dw, a glass bottom having an outer area, and the glass bottom closes the glass tube at the first end. The glass container further including a curved glass heel extending from the outer area of the glass bottom to the first end of the glass tube. The curved glass heel is defined by an outer radius ro, an inner radius ri and a thickness of the glass dh in the curved glass heel, further wherein dh3/(ro×dw)>0.8 mm.

Abstract: A glass bottle body made up by a neck jointed in continuity to a receptacle tubular wall, said bottle body being closed by a bottom wall placed on a bottle end side opposite regarding said neck, defining said bottom wall a receptacle capable of holding liquids, characterised in that said bottom wall is extended, in a perimeter area, by a base tubular wall that internally defines a cavity, said base tubular wall and the receptacle tubular wall being in opposite sides of the bottom wall; and the average height of the base tubular wall being equal to or larger than the average thickness of the base tubular wall, being the contents of the bottle highlighted by two laterally visible layers of the bottom of the bottle, producing a stand effect.

Abstract: A synthetic resin container that is formed in a bottle shape having a mouth and a trunk and that is provided in the trunk with at least one reduced pressure absorbing panel. The trunk has a density of 1.3695 g/cm3 or more, and a ratio of a crystal orientation in a transverse direction with respect to a total value of a crystal orientation in a machine direction and the crystal orientation in the transverse direction in the trunk is less than 44%.

Abstract: A beverage container for a carbonated beverage may include a body and a base. The base may have a skirt that extends from the body and a dome. Ribs extend between the skirt and the dome. The base may also include a plurality of feet. Each foot may be formed between each pair of adjacent ribs. The feet may extend from the skirt to the dome. Each foot may have a seat and two sidewalls. A transition point of each rib may be between the skirt and the dome. A tangent line formed at each transition point may have a slope of zero. A transition between each foot's seat and each foot's sidewalls may be smooth.

Abstract: Disclosed is a preform for a plastics container, which includes: a rotationally symmetrical body about a central axis; an open neck which extends in continuation of the body from an upper end of the latter; a bottom which closes the body starting from a lower end of the latter, the bottom being rotationally symmetrical about the central axis and having a central concavity and a protruding bulge around this concavity, the bottom having a thickness E, measured from an external face, that is variable in accordance with three different criteria respectively applied to three sections of the bottom, namely a central section [0; S1], an intermediate section [S1; S2] and a peripheral section [S2; L].

Abstract: A 5-liter bioreactor vessel enables a substantial increase in the volume of biological media that can be cultivated in the vessel compared to conventional designs. Moreover, when agitated at 1.5× the shaking frequency of a conventional 3-liter bioreactor (i.e., 90 rpm versus 60 rpm), the 5-liter vessel achieves a 19% increase in cell aeration without exceeding the maximum shear stress limit for cell viability. The 5-liter vessel optionally includes a plurality of internal baffles configured to disrupt the liquid vortex and reduce the maximum shear stress transferred to biomedia contained within the vessel.

Abstract: This disclosure provides new carbonated beverage bottle design, particularly carbonated soft drink bottle bases, that can afford improvements in various structural and functional features of the blow molded bottles. The bottle base design can be generated by providing a spherical bottle end cap and extruding at least three (3) feet from the spherical end cap, wherein the center portion of each valley cross section between the extruded feet is convex.

Abstract: Disclosed is a container made of plastic material including a body extending along a longitudinal axis between an opening and a base, the base having: a seat forming a setting plane for the container; a concave arch, rotational around the longitudinal axis and extending from the vicinity of the seat to an amorphous central zone; and stiffening bosses that protrude from the concave arch and that extend radially to the interior of the arch. The stiffening bosses are angularly spaced from one another by alternating first bosses and second bosses that are distributed along: a first annular band in which the first bosses extend; and a third annular band in which the second bosses extend.

Abstract: Disclosed is a container made of a plastic material, provided with a base including a standing ring forming a support flange and a diaphragm extending from the standing ring to a central portion, the diaphragm being capable of standing in an outwardly-inclined position. The diaphragm connects to the standing ring at an outer junction forming an outer articulation of the diaphragm. The diaphragm connects to the central portion at an inner junction forming an inner articulation of the diaphragm. The diaphragm is invertible with respect to the standing ring from the outwardly-inclined position to an inwardly-inclined position. In the outwardly-inclined position, the diaphragm has an outer curved portion and an inner curved portion of opposite curvatures.

Abstract: The present invention is a pressure reduction-absorbing bottle having a cylindrical shape with a bottom made of a synthetic resin material in which a bottom wall portion of a bottom portion of the bottle includes a grounding portion, a rising circumferential wall portion, a movable wall portion, and a central wall portion, the movable wall portion includes a curved portion having a curved surface shape protruding downward, the curved portion is connected to an outer end portion of the central wall portion in a bottle radial direction, and a lowest portion of the curved portion positioned at a lowest position thereof is located at a portion of the curved portion further outward in the bottle radial direction than a central position of the curved portion in the bottle radial direction.

Abstract: A plastic container includes a neck portion, a sidewall portion, and a base including a support ring that extends downward and is configured to support the container on a support surface; a first base portion that extends upwardly from the support ring; a second base portion that extends downwardly from the first base portion; and a reentrant portion that extends upwardly from the second base portion. In embodiments, the container can hold carbonated contents and the sidewall portion may be substantially smooth.

Abstract: A hot-fill PET container or bottle (10) filling with a liquid at an elevated temperature has a side wall (9) extending to a lower portion including a pressure panel (11) and a base (21) in its unfolded or pre-fill position. The panel (11) is transversely oriented and has a decoupling or hinge structure or element (13), an initiator portion (1) and control portion (5) of a steeply angled inverting conical section between 30 and 45 degrees. The control portion enables the inversion of the panel (11) into the container (10) to compensate for vacuum or reduced pressure induced within the container as the liquid cools down. The base (2) can also have a plurality of reinforcing ribs (3).

Abstract: A container (1) made of plastic material, provided with an oblate body (2) and with a bottom (3) in the extension of the body (2) at a lower end thereof, the bottom (3) including: a peripheral base (7) defining an annular standing plane (8) whose contour exhibits, along a long axis, a large dimension A, and, along a short axis perpendicular to the long axis, a small dimension A? that is strictly smaller than the large dimension, a concave arch (13) that extends from the base (7) to a central area (14); wherein the base has: along the long axis, a width C such that: 0.03 ? C A ? 0.1 along the short axis, a width C? such that: 0.05 ? C ? A ? ? 0.15 .

Abstract: Container (1) made of plastic material comprising a body (2) and a petaloid bottom (3) extending the body (2), the bottom (3) comprising a bottom wall (4) that is generally convex towards the exterior, from which feet (5) protrude that are formed by excrescences, the feet being separated side by side by portions of the bottom wall forming hollow valleys (13) that extend radially from a central zone (6) of the bottom to a periphery (7) of the bottom, characterized in that each valley (13) widens out from the central zone (6) towards the periphery (7) and has a concave portion (15) located near the periphery (7).

Abstract: Provided is a container that includes a top having an opening configured to receive a product. The container also includes a bottom adjoining a sidewall that extends to the top of the container and a flexible panel disposed on the bottom and having a plurality of surfaces that each extend radially around a longitudinal axis of the container. One of the plurality of surfaces comprises a downward ramp that extends away from the top of the container when moving radially inward along the downward ramp and another of the surfaces comprises an upward ramp that extends toward the top of the container when moving radially inward along the upward ramp. The surfaces may include dimples protruding inward from the outer surface of the container that have an interlocking pattern.

Abstract: A plastic container (1) is provided with a body (5) and a bottom (6) that extends from a lower end of the body (5), the bottom (6) including: a peripheral base (7) defining a bearing surface (8); a concave arch (10) that extends from a central zone (11) to the base (7); and a series of main reinforcing grooves (13) hollowed into the arch, extending radially from the central zone (11) at least to the base (7) and dividing the arch into a series of angular sectors (15). Where each groove (13) joins each sector (15) of the arch (10) adjacent thereto it is bordered laterally by a reinforcing rib (18) projecting in relation to the sector (15).

Abstract: A bottle includes a bottom wall portion of a bottom portion, grounding portion at an outer circumferential edge, rising circumferential wall portion continuous with grounding portion from the bottle radial inner side, and movable wall portion protrudes from the rising circumferential wall portion upper end. The movable wall portion movable upward around a connected portion to the rising circumferential wall portion. Plurality of ribs are radially disposed around bottle axis on the movable wall portion, and ribs include main recess that is recessed upward, and connection recess. Plurality of main recesses arranged at predetermined intervals in the bottle radial direction, and connection recess connects main recesses, adjacent to each other in the bottle radial direction, in the bottle radial direction together. A depth ratio D2/D1 that is the ratio of a depth (D2) of the connection recess to a depth (D1) of each main recess <2/9 and ?1.

Abstract: A stretch blow-molded plastic container, including a container body, one longitudinal end of which is closed by a container bottom and to whose other longitudinal end is connected a shoulder section; and a container neck, which connects to the shoulder section, the shoulder section having at least two hinge-like areas that run in a circumferential direction, and which areas are arranged at a distance (a) from one another and in each case have a wall thickness (v, w) that is reduced compared to the adjoining areas, the stretch blow-molded plastic container having a total stretching ratio of greater than 11 for a longitudinal stretching ratio of 2.5 to 3.5.

Abstract: A container made of plastic material, provided with a body and a bottom extending at a lower end of the body, the bottom including an annular seat extending substantially in the prolongation of the body and defining a seating plane; a concave arch that extends from a zone near the seat to a central zone, the arch including a series of stiffeners that extend radially from the central zone to the seat.

Abstract: Container (1) made of a plastic material, provided with a base (7) including a standing ring (8) forming a support flange (9) and a diaphragm (11) extending from the standing ring (8) to a central portion (10), the diaphragm (11) being capable of standing in an outwardly-inclined position. The diaphragm (11) connects to the standing ring (8) at an outer junction (12) forming an outer articulation of the diaphragm (11). The diaphragm (11) connects to the central portion (10) at an inner junction (13) forming an inner articulation of the diaphragm (11). The diaphragm (11) is invertible with respect to the standing ring (8) from the outwardly-inclined position to an inwardly-inclined position. In the inwardly-inclined position, at least an inner portion (16) of the diaphragm (11) adjacent to the inner junction (13) is curved in radial section, with a concavity turned outwards.

Abstract: Base includes an outer support wall, a support surface extending inwardly from the outer support wall and defining a reference plane, an inner support wall extending upwardly from the support surface, a first radiused portion extending radially inward from the inner support wall and concave relative to the reference plane, a second radiused portion extending radially inward from the first radiused portion and convex relative to the reference plane, an intermediate surface extending radially inward from the second radiused portion, a third radiused portion extending radially inward from the intermediate surface and convex relative to the reference plane, and a central portion disposed proximate the third radiused portion.

Abstract: Plastic containers, base configurations for plastic containers, and systems, methods, and base molds thereof. Plastic containers have 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 can also be constructed and operative to accommodate internal pressures within the filled container resulting from subjecting the filled plastic container to cooling or cool-down processing.

Abstract: Systems for containing and manipulating fluids including systems and methods involving supported collapsible bags that may be used as reactors for performing chemical, biochemical and/or biological reactions contained therein are provided. Generally, a series of improvements and features for fluid containment systems such as gas delivery configurations, foam control systems and bag molding methods and articles for supported collapsible bag vessels and bioreactors are provided. For instance, in one aspect, fluids contained in a vessel can be sparged, e.g., such that a fluid is directed into a container of the vessel, and in some cases, the sparging can be controlled by rapidly activating or altering the degree of sparging as needed. Multiple spargers may be used in some cases. In another aspect, the vessel includes a seamless collapsible bag. In some cases, the collapsible bag may be injected, blown, or spin cast molded.

Abstract: A plastic container comprises an upper portion including a finish adapted to receive a closure, a lower portion including a base, and a sidewall extending between the upper portion and the lower portion. The upper portion, the lower portion, and the sidewall define an interior volume for storing liquid contents. The plastic container further comprises a pressure panel located on the container and moveable between an initial position and an activated position. The pressure panel is located in the initial position prior to filling the container, and is moved to the activated position after filling and sealing the container. Moving the pressure panel from the initial position to the activated position reduces the internal volume of the container and creates a positive pressure inside the container. The positive pressure reinforces the sidewall. A method of processing a container is also disclosed.

Abstract: The invention concerns a method of blowing and filling a container (120) from a preform, the method comprising: —placing a preform within a mold (140), —stretching the preform —injecting a liquid into the preform after the stretching has started so as to cause expansion of the preform within the mold, thereby obtaining a blown and filled container (120), —capping the blown and filled container (120).

Abstract: A heat-set container that defines a longitudinal axis is disclosed that includes a finish and a sidewall portion extending from the finish. The container also includes a base portion extending from the sidewall portion and enclosing said sidewall portion to form a volume therein for retaining a commodity. The base portion has a plurality of contact surfaces for supporting the container. The plurality of contact surfaces are spaced away from each other about the longitudinal axis. Also, the container includes a central pushup portion disposed in the base portion and extending generally toward the finish. The central pushup portion is substantially centered on the longitudinal axis, and the central pushup portion is moveable in response to internal vacuum pressure to decrease the volume.

Abstract: A plastic container comprises an upper portion including a finish adapted to receive a closure, a lower portion including a base, and a sidewall extending between the upper portion and the lower portion. The upper portion, the lower portion, and the sidewall define an interior volume for storing liquid contents. The plastic container further comprises a pressure panel located on the container and moveable between an initial position and an activated position. The pressure panel is located in the initial position prior to filling the container, and is moved to the activated position after filling and sealing the container. Moving the pressure panel from the initial position to the activated position reduces the internal volume of the container and creates a positive pressure inside the container. The positive pressure reinforces the sidewall. A method of processing a container is also disclosed.

Abstract: A blow molding method includes a primary blow molding step that molds a preform (200) in a primary blow mold (300A) that includes a primary temperature control section (330) to obtain an intermediate molded article (202), a shrinkage step that discharges blow air from the intermediate molded article to shrink the intermediate molded article, and a secondary blow molding step that blow-molds the intermediate molded article (204) that has shrunken in a secondary blow mold that includes a secondary temperature control section (430) to obtain a final molded article. The primary blow molding step cools a first intermediate molding region of the intermediate molded article that follows a neck using a first primary temperature control section, and the shrinkage step shrinks a second intermediate molding region of the intermediate molded article of which the temperature is controlled by a second primary temperature control section.

Abstract: Disclosed is a container made of plastics material, which is provided with a body and a bottom (6) that extends from a lower end of the body, the bottom (6) including: a peripheral base (7) that defines a setting-down plane (8); a concave vault (10) which extends from a central area (11), forming a peg that projects towards the inside of the container, to the base (7); a set of main reinforcing grooves (13) which extend radially from the central area (11) as far at least as the base (7), wherein, in the container, the vault (10) has a central region (15), a median region (16) and a peripheral region (17) that are each separated by an internal axial indentation (18) and an external axial indentation (19) which extend annularly in a continuous manner around the central area (11).

Abstract: A polymeric container including an upper portion defining an opening to an interior volume of the container. A base is movable to accommodate vacuum forces generated within the container, thereby decreasing the volume of the container. A substantially cylindrical sidewall extends between the upper portion and the base. A rigid, central pushup portion of the base is at an axial center of the base. A central longitudinal axis of the container extends through a center of the central pushup portion. A flexible diaphragm of the base extends outward from the central pushup portion.

Abstract: A volume expansion feature for a fluid reservoir is provided, the volume expansion feature comprising a central recess, a plurality of channels extending from the central recess, where the central recess and the channels are positioned at least in part in a recessed surface profile. The recessed surface profile is reversibly moveable from a first inwardly directed configuration, to a second outwardly directed configuration. The central recess and the channels are configured to impart an inward bias to maintain the recessed surface profile in the first inwardly directed configuration under standard loading of the fluid reservoir. Upon increased pressure within the fluid reservoir, the recessed surface profile extends to the second outwardly directed configuration, thereby increasing the volume of the fluid reservoir.

Abstract: A semi-rigid collapsible container has a side-wall with an upper portion, a central portion, a lower portion and a base. The central portion includes a vacuum panel portion having a control portion and an initiator portion. The control portion is inclined more steeply in a vertical direction, i.e. has a more acute angle relative to the longitudinal axis of the container, than the initiator portion. On low vacuum force being present within the container panel following the cooling of a hot liquid in the container the initiator portion will flex inwardly to cause the control portion to invert and flex further inwardly into the container and the central portion to collapse. Raised ribs provide an additional support for the container in its collapsed state. In another embodiment the telescoping of the container back to its original position occurs when the vacuum force is released following removal of the container cap.

Abstract: A bottomed cylindrical bottle formed of a synthetic resin material through biaxially oriented blow molding, includes a bottom portion of the bottle having a bottom wall portion, the bottom wall portion including a ground portion disposed at an outer circumferential edge portion, a rising circumferential wall portion continuously extending upward so as to be connected to the ground portion from an inside in a bottle radial direction, a movable wall portion protruding from an upper end portion of the rising circumferential wall portion toward the inside in the bottle radial direction, and a recessed circumferential wall portion having a diameter in the bottle radial direction such that the diameter gradually decreases in a direction from an inner end portion of the movable wall portion toward an upper side thereof, an annular recess depressed upward being formed at the movable wall portion in a circumferential direction thereof.

Abstract: A bottle made of polymer material includes a base provided with a plurality of ribs. Each rib is composed of a curvature of the base of the bottle which forms a protuberance in the longitudinal direction directed towards the inside of the bottle. The ribs extend in a radial direction along a line of radial extension. The bottle is characterized in that the projection, in a transverse plane, of the line of radial extension of at least one of said ribs is curved.

Abstract: A container of plastic material, having a body extending along a principal axis and a bottom in the extension of the body at a lower end thereof. The bottom has an annular seat defining a seating plane; and a conical arch that extends from near the seat towards the interior of the container to a central apex, the arch having in transverse cross-section a star-shaped profile inscribed between two circles, the ratio of the diameters of which is greater than or equal to 0.7.

Abstract: Container of plastic material having a flattened body and a bottom in the extension of the body having peripheral seat defining a seating plane the contour of which has in the same plane a large dimension A1 and a small dimension A2 that is strictly smaller than the large dimension, and an inner annular cheek substantially perpendicular to the seating plane. The bottom having a concave arch that extends from the seat towards a central zone. A height H of the cheek and a width L of the seating plane are such that 0.5 ? L H ? 2.5 . A transverse extension A of the seating plane and a transverse extension B of the body, measured near the bottom, are such that A B ? 0.85 .

Abstract: A container made of plastic, provided with a body and with a bottom extending from an end of the body, the bottom having a peripheral seat defining a seating plane, a central zone at an inner area of the bottom surrounding a pellet and corresponding to a zone of injection of the material of a preform used to produce the container, a concave arch extending from the central zone to the peripheral seat, a series of principal reinforcing grooves extending radially from the central zone to at least the peripheral seat. The arch has two concentric regions, including a central region and a peripheral region, separated by a median axial step that extends annularly continuously around the central zone, so that the central region is raised with respect to the peripheral region.