A laser processing method includes: marking multiple concaves on a surface of a preform before blow molding.

A container formed of a common one-piece thermoplastic substrate. The container has an overlapping seam having an overlap magnitude. At a location that is five times the overlap magnitude away from the overlapping seam, the container wall has a container wall Opacity less than about 50%. At a corresponding position along the overlapping sea, the overlapping seam has a seam Opacity that is less than 200% of the container wall Opacity.

The invention relates to a method for controlling a production facility of a series of containers from a series of preforms made of plastic materials. The method includes a first step of producing a preliminary series of individual containers from a preliminary series of preforms made of plastic materials. For each individual container produced during a tracking period, the method records (i) a marking that distinguishes said container other containers produced during said tracking period, and (ii) data relative to the production facility, its operation, and/or the preform or container. The method also includes a second step during which one or more physical values of each of the individually identified containers are measured during the first step, and a third step of compiling a database that matches, for each individually identified container, the measurement(s) of the second step, and the series of data acquired during the first step.

Method for the production of containers from a series of plastic preforms heated in a container production facility having at least one heating station, a forming machine with a number of forming stations, one or more treatment machines with a number of treatment stations. The method includes: forming the preforms in the forming machine; treating the individual containers in the treatment machine; and circulating each container held individually between the forming machine and the treatment machine(s). The method also includes individual identification of each container that is produced during a predetermined tracking period, an individual identification phase including a marking step during which each individual container that is produced during the tracking period receives a marking that matches the container, making it possible to identify individually the container by distinguishing it from all of the other containers produced by the production facility during the tracking period.

The invention relates to a method for controlling a production facility of a series of containers from a series of preforms made of plastic materials. The method includes a first step of producing a preliminary series of individual containers from a preliminary series of preforms made of plastic materials. For each individual container produced during a tracking period, the method records (i) a marking that distinguishes said container other containers produced during said tracking period, and (ii) data relative to the production facility, its operation, and/or the preform or container. The method also includes a second step during which one or more physical values of each of the individually identified containers are measured during the first step, and a third step of compiling a database that matches, for each individually identified container, the measurement(s) of the second step, and the series of data acquired during the first step.

Disclosed is a method for the preferential heating of a thermoplastic hollow body having at least one portion to be heated and another to be superheated, the portion that is to be superheated initially having a radiation absorption coefficient substantially identical to that of the portion to be heated. The method includes, in succession: a first step of marking the portions of the hollow body that are to be superheated, during which step isolated marks are made in the thickness of the wall of the portion that is to be superheated so as to increase its absorption coefficient; a second step of preferential heating of the hollow body by uniform exposure of the portions that are to be heated and of the portions that are to be superheated to the heating electromagnetic radiation. Also disclosed is a preform marked in accordance with the first step of the method.

A method for producing a marked container (12), includes the following steps: a first step (E1) of heating, beyond a glass transition temperature, at least one shape-changing portion of the thermoplastic material wall (17) of a preform (14); and a second step (E2) of forming the container by injecting a pressurized fluid into the body (16) of the preform (14) such as to change the shape of the heated portion of the wall (17) by stretching it; and a step (E0) for marking the preform (14), during which a mark (39) is provided on the shape-changing portion of the wall (17) such that the mark (39) is stretched at the same time as the wall (17), during step (E2) after forming.

A container formed of a common one-piece thermoplastic substrate. The container has an overlapping seam having an overlap magnitude. At a location that is five times the overlap magnitude away from the overlapping seam, the container wall has a container wall Opacity less than about 50%. At a corresponding position along the overlapping sea, the overlapping seam has a seam Opacity that is less than 200% of the container wall Opacity.

Disclosed is a method for the preferential heating of a thermoplastic hollow body having at least one portion to be heated and another to be superheated, the portion that is to be superheated initially having a radiation absorption coefficient substantially identical to that of the portion to be heated. The method includes, in succession: a first step of marking the portions of the hollow body that are to be superheated, during which step isolated marks are made in the thickness of the wall of the portion that is to be superheated so as to increase its absorption coefficient; a second step of preferential heating of the hollow body by uniform exposure of the portions that are to be heated and of the portions that are to be superheated to the heating electromagnetic radiation. Also disclosed is a preform marked in accordance with the first step of the method.

Method for the production of containers from a series of plastic preforms heated in a container production facility having at least one heating station, a forming machine with a number of forming stations, one or more treatment machines with a number of treatment stations. The method includes: forming the preforms in the forming machine; treating the individual containers in the treatment machine; and circulating each container held individually between the forming machine and the treatment machine(s). The method also includes individual identification of each container that is produced during a predetermined tracking period, an individual identification phase including a marking step during which each individual container that is produced during the tracking period receives a marking that matches the container, making it possible to identify individually the container by distinguishing it from all of the other containers produced by the production facility during the tracking period.