Abstract: A method of manufacturing a container having a local recessed or relief impression, from a blank (2) of thermoplastic material. The method includes a heating step in which the blank (2) is exposed to infrared radiation and in which the infrared radiation is monochromatic or pseudo-monochromatic, the intensity of which locally has an extremum in front of a localized zone (11) of the blank, in such a way as to generate a temperature extremum in the zone (11). The method also includes a forming step in which a fluid under pressure is injected into the blank (2) thus heated, and in which the recessed or relief impression is formed at the localized zone (11).

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: 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: 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).

Abstract: A machine for manufacturing containers from blanks of plastic material, which includes an oven furnished with a plurality of radiation sources for heating blanks as they travel through at a predetermined speed of travel and heating profile, and a programmed control center for modifying the speed of travel and heating profile based on a temperature measurement made on a blank leaving the oven, and a pressure measurement made in the blank during a subsequent blowing.

Abstract: Nozzle for a blowing or stretch-blow molding of containers starting from parisons made of plastics, said nozzle having a nozzle body capable of coming in contact with an upper face of a mold designed for receiving a parison, said nozzle being characterized in that it comprises: An insert provided with a frusto-conical contact face capable of contacting a mouth of the parison, wherein said insert is displaceable with respect of the nozzle body between an upper position and a lower position, and A return spring which biases the insert towards its lower position.

Abstract: Bottom (2) of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material, wherein said bottom (2) includes a transverse support surface (4) and, on either side of said transverse support surface (4), a transverse outer edge (5) and a concave inner wall with a transverse central portion (10) comprising a pellet (11) of a low-crystallinity material, said pellet corresponding to the injection point of the perform; the bottom (2) comprises 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 said transverse central portion (10), wherein said reinforcing ribs (1) flare from their outer edge (12) toward their inner edge (13).

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: Process for forming containers from a blank, preferably a preform, made of a thermoplastic, the containers being formed using a stretch-blow moulding machine of rotary type having a blow-moulding mould mounted on the periphery of a carousel rotated continuously about its axis, the blow-moulding mould operating in cyclic manner according to a blow-moulding cycle having the following steps: placing a preheated blank in a blow-moulding mould; closing the blow-moulding mould; blowing the blank in the blow-moulding mould; flushing the inside of the container with a cooling gas, by injecting air thereinto; grasping the blow-moulded container by external gripping means; and opening the blow-moulding mould, which process includes automatically varying the duration of the flushing step at each start of production of the containers, in a temporary and evolving manner for a few minutes to establish in the containers thermal conditions enabling the first containers to be formed at a temperature that gives them a final vo

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 moulding or stretch-blow moulding unit.

Abstract: Spongy mass (4) suitable for being brought into contact with the end wall of a container for a predetermined time, for treating said end wall of the container. Said mass consists of a soft crosslinked foam having semi-open cells and high resilience, has a main face (14) for contact with the end wall of the container and includes blind grooves (15) which open onto said main face (14), but do not emerge on the opposite side, and that are distributed in two sets of mutually transverse grooves (15a, 15b) that define blocks (16). Application: cooling of the end walls of thermoplastic containers leaving a moulding unit; wiping of the end walls of thermoplastic containers.

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: Manufacturing process of a container (2) in a mold (5) having a cavity (8) defining the final shape of the container (2), from a polymer blank (3) heated in advance, this process comprising the following operations: introduction of the blank (3) into the mold (5) heated to a predetermined temperature, introduction into the blank (3) of a pressurized explosive gaseous mixture, ignition of the gaseous mixture.

Abstract: Polymer container (2), having an inside wall (42) and an opposed outside wall (43), the crystallinity rate of which exhibits a negative gradient of the side of the inside wall (42).

Abstract: Process for forming containers from a blank, preferably a preform, made of a thermoplastic, the containers being formed using a stretch-blow moulding machine of rotary type having a blow-moulding mould mounted on the periphery of a carousel rotated continuously about its axis, the blow-moulding mould operating in cyclic manner according to a blow-moulding cycle having the following steps: placing a preheated blank in a blow-moulding mould; closing the blow-moulding mould; blowing the blank in the blow-moulding mould; flushing the inside of the container with a cooling gas, by injecting air thereinto; grasping the blow-moulded container by external gripping means; and opening the blow-moulding mould, which process includes automatically varying the duration of the flushing step at each start of production of the containers, in a temporary and evolving manner for a few minutes to establish in the containers thermal conditions enabling the first containers to be formed at a temperature that gives them a final vo

Abstract: A container, in particular a bottle, made of thermoplastic material produced by blow molding or stretch-blow molding of a heated preform, the container designed to contain a liquid being flat and having a substantially domed base with outward-facing cavity defining a substantially planar peripheral annular seat for being set on a support, the base being provided with several grooves radiating from the base center. Each groove in its zone of intersection with the annular seat, has a portion of substantially increased width and the two edges of that portion of the groove are curved with relatively large radii of curvature and with respective concavities facing one another.

Abstract: The invention concerns a method for controlling a blow molding machine (18) for making containers (12). The machine (18) comprises a control system (26) and a number of blow molding stations (22) and is characterized in that the control system implements iteratively a control cycle including the following successive phases: a phase of estimating the mass of a significant portion of each container (12); an analysis phase to compare the estimated mass with a reference mass to as to detect mass variations; a correction phase during which the pre-molding and/or drawing and/or blow molding parameters are modified based on the mass variations.

Abstract: A container, in particular a bottle, made of thermoplastic material produced by blow molding or stretch-blow molding of a heated preform, the container designed to contain a liquid being flat and having a substantially domed base with outward-facing cavity defining a substantially planar peripheral annular seat for being set on a support, the base being provided with several grooves radiating from the base center. Each groove in its zone of intersection with the annular seat, has a portion of substantially increased width and the two edges of that portion of the groove are curved with relatively large radii of curvature and with respective concavities facing one another.