An oven for preforms and in particular a preform rotation system heats portions of the preform in a preferential manner. An oven (1) for blowing or stretch-blowing preforms (P) to provide containers (C) with oval section includes a path (2) for the preforms (P), transfer system (3) of the preforms (P) from a transport system upstream of the oven (1) and a transfer system (4) of the heated preforms (P) from the oven (1) to a downstream transport. Mandrels (9) are slidingly carried along the path (2), the mandrels temporarily engage with the preforms (P) to conduct the preforms along the path (2). The oven (1) includes at least one first heating module (10) and at least one second heating module (10). The oven (1) includes elements (22, 25) for rotating the preforms (P) by 180, the elements being in median position of the second heating module (10).

A method of manufacturing a polypropylene vessel using a single-step injection stretch blow molding machine using a heat-conditioning step. The method may include providing a chemical composition comprising polypropylene, forming a preform vessel of the chemical composition in a second shape, heating the preform vessel at a plurality of positions on the preform vessel with heat pots, wherein each of the heat pots is configured to heat a corresponding one of the plurality of positions on the preform vessel by raising a temperature of the heat pot to a respective temperature, wherein each respective temperature of each of the heat pots is different from another respective temperature of another of the heat pots, wherein the temperatures of the heat pots are based on the desired first shape of the product. The method may include forming, from the heated and expanded preform, a second vessel in a desired first shape.

A bottle having good mechanical properties and lightness due to its bottom design includes a bottom, a body, and a neck. The bottom has a dome, a coronal arch, an annular seat, a side wall, six main radial grooves, five secondary radial grooves situated between the main grooves, each having an end Ev in the arch, and a peripheral end Ep in the side wall. The bottom is such that the ratio Mf/Vuf, wherein Mf is the weight of the bottom and Vuf is the useful volume of the bottom, is less than or equal to 0.050 g/mL and the ratio ?.sup.do/H.sup.do, wherein ?.sup.do is the diameter of the dome at its base and H.sup.do is its apex height along an axis Z, is greater than or equal to 4.4. The invention also relates to a manufacturing method and a mold for the bottle.

Plastic aerosol container having a thermally crystallized neck finish configured to receive an aerosol valve assembly and an expanded strain oriented aerosol container body integral with the neck finish. A junction between the thermally crystallized neck finish and the strain oriented container body defines a pull point at which strain orientation begins.

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).

A module (10) for heating a preform (12) made of a thermoplastic, includes: a lamp (16) having an emissive portion (22) emitting heating electromagnetic radiation and a non-emissive portion (24) that does not emit the heating radiation; and a longitudinal lens (32) that is fastened to the lamp (16), by at least one fastening brace (34), parallel to the emitting portion (22) in order to focus the heating radiation toward a selected zone of the preform; wherein each brace (34) is only fastened to the non-emissive portion (24) of the lamp (16).

A heating unit for heating preforms made of plastics material and having a flange separating a body and neck. The heating unit comprising a plurality of supports, each bearing a gripping member for gripping the preforms. The supports are movable in the heating unit such that each gripping member moves along a conveying path of the preforms. The heating unit also comprises a plurality of shells secured to the supports, where each shell is connected to one or more supports by an actuating member. The actuating member is mounted on said support to pivot about an axis situated at a distance from the conveying path of the preforms. The heating unit further comprising means for pivoting the actuating member to drive the shell from an open position to a protection position when the support to which said shell is connected is passing from an admission/releasing zone to a holding zone.

Disclosed is a method and a system for producing an ampoule filled with a medical liquid. A preform is produced by plastic injection moulding that is then inhomogeneously heated and blown to form an ampoule body. Further disclosed is an ampoule produced by means of stretching and blowing, which comprises a connector with a break-off part in which the predetermined breaking point is aligned with the septum of the connector.

The outer circumferential surface of a bottom 4 of a preform 1 and a lower site 3a of a trunk 3 continuous with the bottom 4 is mechanically brought into intimate contact with a cooling pot 16 to undergo reliable cooling. The trunk 3, excluding the lower site 3a of the trunk 3 continuous with the bottom 4, is heated to a predetermined temperature by a heating block 17. When blow-molded, the so treated preform 1 can provide a container having a bottom of a desired thickness and having a uniformly stretched thin-walled trunk.

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.