Method and device for marking at least one inner face of a container, and corresponding container

Abstract

The present inventing relates to a method for marking at least one inner face of a container with at least one given pattern, in which method the inside of said inner face is at least partially coated with a pigmented sol-gel layer that reacts to laser radiation, by spraying or by means of a stamp applied to a precise zone of the layer provided for containing the pattern, and the pattern is developed by interaction between the sol-gel and UV laser radiation specifically programmed according to the pattern to be revealed, the UV laser radiation being emitted by a device comprising an optical system having a long optical length that allows a field depth of more than 1 mm to be obtained. The present invention also relates to a device suitable for implementing this method and to a container obtained by this method.

Dependencies are inferred from the claim text.