Abstract: The invention relates to a container made of a plastic material, provided with a body (5) and a bottom (6) extending at a lower end of the body (5), wherein the bottom (6) includes: an annular seat (7) extending substantially away from the body (5) and defining a support surface (8) and an inner annular flange (11) substantially perpendicular to the support surface; a concave arch (13) which extends from an area adjacent to the seat (7) towards a central area (14). The axial dimension H of the flange and the radial dimension L of the support surface are such that: formula (I). 0.6 ? L H ? 1.

Abstract: A method of producing a container (2) from a blank (3) made of plastics material within a mould (4) which is provided with a wall (5) defining a cavity (6) bearing the impression of the container (2), and with a mould base (8) which can move relative to the wall (5) between a retracted position in which it extends in set-back manner relative to the cavity (6) and a deployed position in which it closes the cavity (6). The method includes a boxing stage in which the mould base (8) moves from its retracted position to its deployed position, the travel (C) of the mould base (8) between its retracted position and its deployed position being greater than 20 mm.

Abstract: An installation (26) for thermally conditioning thermoplastic preforms (14) that are intended to be formed, the installation (26) including:—a thermal-conditioning zone (40) divided vertically into a heating first part (42) which is intended to house a body (16) of the preform (14) and a cooling second part (44) which is intended to house a neck (20) of the preform (14);—a device (62) for cooling a portion of the preform (14) by producing a stream of gas passing through the thermal-conditioning zone (40); characterized in that the cooling device (62) produces a blade (63) of gas blown with laminar flow through an axial outlet slit (72).

Abstract: Method of manufacturing a container (14) from a blank (2) of thermoplastic material having a body (4) extending along a principal axis (A), which comprises: A selective heating step in which the body (4) of the blank (2) is exposed to monochromatic or pseudo-monochromatic infrared radiation, the power of which is modulated along the principal axis (A) of the body (4) in such a way that said body has alternating hot annular regions (4A, 4C, 4E, 4G, 4I), the temperature of which is far higher than the glass transition temperature (Tg) of the material, and comparatively colder annular regions (4B, 4D, 4F, 4H), the temperature of which is close to the glass transition temperature (Tg); A forming step in which a fluid under pressure is injected into the blank (2) thus heated, said step being carried out in free expansion.

Abstract: Container (1) having a body (6) and a bottom (7) that together delimit an internal primary volume (11) of the container (1), this container (1) also comprising a protruding base (12) comprising an outer wall and an inner wall, the base (12) comprising a skirt which protrudes from the region (8) of the join between the body (6) and the bottom (7), and a foot which lies at a lower end of the skirt and defines a setting-down plane for the container (1), in which container:—the walls are locally welded together in the region of the skirt;—the foot forms a hollow bulge, and the outer wall, the inner wall and the setting-down plane together define a secondary volume isolated from the primary volume (11) by the weld.

Abstract: A method for placing an oven (12) for heat-treating preforms (13) into standby, including: a device (16) for conveying the preforms (13); at least one heating lamp (22); at least one heat-accumulation element (24, 26); and an electronic unit for controlling the heating lamps (22), characterized in that the method includes, in series: a first switching-off step (E1) which is triggered when a stop in production is determined, and in which the heating lamps (22) are completely switched off; and then a second temperature-maintaining step (E2) which is triggered after the first step (E1), and in which the heating lamps (22) are activated at a predetermined intensity in order to reheat the accumulation elements (24, 26).

Abstract: An oven (10) for the heat treatment of preforms and a method for operating an air-cooling device (42) fitted to such an oven includes controlling elements (58) to vary the cooling air flow rate onto the body (18) and bottom (20) of the preforms (12) along the heating path.

Abstract: A bottom (2) of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material. The bottom (2) includes a transverse support surface (4) and, on either side of the transverse support surface (4), a transverse outer edge (5) and a concave inner wall with a transverse central portion (10) having a pellet (11) of a low-crystallinity material. The pellet corresponds to the injection point of the perform. The bottom (2) has reinforcing ribs (1) having an outer edge (12) adjacent to the outer edge (5) of the bottom (2) as well as an inner edge (13) adjacent to the transverse central portion (10) but not reaching the transverse central portion (10). The reinforcing ribs (1) flare from their outer edge (12) toward their inner edge (13).

Abstract: Container (1), obtained by blow molding or stretch blow molding of a blank made of plastic material, which comprises a body (2), a shoulder (3) in the extension of the body (2) at an upper end thereof, and a neck (4) in the extension of the shoulder (3), the shoulder (3) being articulated between two stable positions, namely a deployed position in which the shoulder (3) projects from the body (2), and a retracted position in which the shoulder (3) is at least partially retracted into the body (2), the shoulder (3) being articulated in order to be able to adopt, in addition to the deployed position and the retracted position, a third stable position, intermediate between the deployed position and the retracted position.

Abstract: A method for producing a container (2) from a blank (3) in a mould (1) provided with a wall (4) and a mould bottom (8) that is movable relative to the wall (4) between a retracted position and a deployed position, the method including: a phase of introducing the blank (3) into the mould; a preblowing phase including the injection, into the blank (3), of a fluid pressurised to a so-called preblowing pressure, a blowing phase following the preblowing phase and including the injection, into the blank (3), of a fluid pressurised to a so-called blowing pressure greater than the preblowing pressure; a boxing phase including the displacement of the mould bottom (8) from the retracted position thereof to the deployed position thereof, initiated after the pressure in the blank (3) has reached the blowing pressure.

Abstract: Process for manufacturing a container (2) from a plastic preform (3) by blow-molding in a mold (11), comprising: an operation of introducing the preform (3) into the mold (11); a blow-molding operation consisting of pressurizing the preform (3) by introducing a gas under a blow-molding pressure into it; a flushing operation subsequent to the blow-molding operation consisting of partially pressurizing the container (2) by introducing a gas under a flushing pressure lower than the blow-molding pressure into it; an operation of at least partial depressurization of the container down to a pressure lower than the flushing pressure, wherein this depressurization operation is subsequent to the blow-molding operation and prior to the flushing operation.

Abstract: Plastic container (1), characterized in that it comprises: a rigidified body (5), a bottom (8) extending to a lower end of the container (1) and comprising: an annular base (9) extending substantially perpendicular to the body (5) in the prolongation thereof; an annular step (10) extending from the base (9) towards the interior of the container (1), a recess (12) at the center of the bottom (8) projecting towards the interior of the container (1), a deformable annular membrane (11) in the shape of a spherical cap extending substantially perpendicular to the body (5) between the step (10) and the recess (12).

Abstract: Mold for manufacturing, by blowing blanks made of plastic material, containers having a body and a bottom and a wall defining a cavity around a principal axis of the mold and a lateral surface. The wall has, in a lower part, an opening defining a passage for a mold bottom, an upper surface that confers at least in part the shape to the bottom of the container, with said opening having an upper edge. The mold, in any plane containing the axis of the wall: the ratio between a transverse dimension of the upper edge of the opening and a transverse dimension of a lower end of the lateral surface of the wall is greater than 0.95, and the tangent to the lateral surface of the wall, at the lower end thereof, forms with the axis of the wall an angle equal to or less than 30°.

Abstract: Stackable container (1) having a body (2) and a bottom (3) comprising: an annular seat (10) defining a seating plane (11) complementary with a peripheral face (8) provided on a shoulder (4); a conical arch (14) that extends from the seat (10). In this container: an outer transverse extension Dext of the seat and an overall transverse extension D of the body are such that: Dext D ? 0.8 the arch (14) has a peripheral section (17) complementary with a frustoconical surface (7) of the shoulder (4), the seating plane (11) and the peripheral support section (17) define a contact surface, the projection of which on the seating plane (11) has a surface area SC such that: Sc S ? 0.4 where S is the surface area delimited by an outer perimeter (12) of the seat (10).

Abstract: A method of manufacturing a container from a blank in a stretch blowing assembly equipped with a mold provided with a wall and a mold bottom axially movable between an extended position and a retracted position and a stretch unit having a rod axially movable with respect to the wall and a device for controlling the movement of the rod. The method involves a stretch blowing phase; a boxing phase during which the mold bottom, initially in the extended position, is moved towards its retracted position, the boxing phase having a retraction operation including controlling a movement of the rod in synchronization with the movement of the mold bottom, or releasing the rod to allow the free axial movement thereof.

Abstract: Method of heating a blank (2) of plastic material for the manufacture of a hollow body by forming from the blank (2), which comprises the operations consisting of: inserting the blank (2) into an oven (7) provided with sources (9) of monochromatic or pseudo-monochromatic electromagnetic radiation emitting in the infrared range; exposing the blank (2) to the radiation from the sources (9), adjusted to a predetermined emission power for a predetermined exposure time; measuring a temperature on an outer wall (16) of the blank (2); Characterized in that it comprises an operation consisting of: adjusting the exposure time and/or the emission power so that said temperature at an exit from the oven (2) [sic: (7)], does not fall between Tg and 1.8·Tg, where Tg is the glass transition temperature of the material.

Abstract: Method of manufacturing a container from a blank of plastic material, within a mold provided with a wall defining a cavity with the impression of the container, and a mold bottom that is movable with respect to the wall between a retracted position and a deployed position in which it extends protruding into the interior of the cavity in order to form a hollow recess in the container. The method includes inserting the blank into the mold; a pre-blowing operation including injecting a fluid under pressure into the blank, at a pre-blowing pressure; a blowing operation including injecting a fluid under pressure into the blank at a blowing pressure that is greater than the pre-blowing pressure; and a boxing operation, initiated prior to the blowing operation, and including moving the movable mold bottom from its retracted position to its deployed position.

Abstract: The invention relates to the application of a fluid, especially a liquid, to a hot end wall (2) of at least one thermoplastic container (1). For this purpose, a spongy mass (4) impregnated with the fluid is brought into contact with the end wall (2) of said at least one container (1), said spongy mass being held in contact with the end wall (2) for a predetermined time. Application in particular to the cooling of the hot end walls of containers leaving a blow molding or stretch-blow molding unit.

Abstract: Method of manufacturing a container (14) from a blank (2) of thermoplastic material having a body (4) extending along a principal axis (A), which comprises: A selective heating step in which the body (4) of the blank (2) is exposed to monochromatic or pseudo-monochromatic infrared radiation, the power of which is modulated along the principal axis (A) of the body (4) in such a way that said body has alternating hot annular regions (4A, 4C, 4E, 4G, 4I), the temperature of which is far higher than the glass transition temperature (Tg) of the material, and comparatively colder annular regions (4B, 4D, 4F, 4H), the temperature of which is close to the glass transition temperature (Tg); A forming step in which a fluid under pressure is injected into the blank (2) thus heated, said step being carried out in free expansion.

Abstract: Container of thermoplastic material having a body extending along a principal axis, characterized in that the body has at least one annular narrowed zone of extra thickness.