Method for marking a decorative article

An in-line method for marking a substrate made of extruded synthetic material, comprising:

• extruding the synthetic material through an extrusion die to form the substrate, and
• marking the substrate by scrolling the substrate obtained from the extrusion die between two rotatably mounted and temperature-controlled rollers with an upper roller and a lower roller, one of the rollers having an impression forming a negative of a decoration to be marked on one face of the substrate, said one of said rollers or the other of said rollers including at least one notch configured to guide the substrate as the substrate passes through the extrusion die and between the two rollers, wherein
• the impression is disposed in a concave portion of the one roller,
• the impression and the at least one notch are disposed on the same roller, and
• the impression is placed in between two notches of the at least one notch each having a curved concave shape in an axial direction of the one roller.

An in-line method for marking a substrate made of extruded synthetic material, comprising:

• extruding the synthetic material through an extrusion die to form the substrate, and
• marking the substrate by scrolling the substrate obtained from the extrusion die between first and second rotatably mounted and temperature-controlled rollers, the first and second rollers having respective first and second planar faces, the first and second planar faces opposing each other,
• wherein the first roller has, in the first planar face:
• an impression forming a negative of a decoration to be marked on one face of the substrate, being a separate structure from the first roller, and having an outer surface configured to mark the substrate being parallel to, and recessed from or flush with, the first planar face, and
• at least one guide notch separated from the impression and configured to guide the substrate as the substrate passes through the extrusion die and between the two rollers;
• and
• the second planar face has no notch or impression.

An in-line method for marking a substrate made of extruded synthetic material, said method comprising:

• extruding the synthetic material through an extrusion die to form the substrate, and
• marking said substrate by scrolling the substrate obtained from the extrusion die between two rotatably mounted and temperature-controlled rollers with an upper roller and a lower roller, one of said rollers having an impression forming a negative of a decorative texture to be marked on one face of the substrate, said one of said rollers or the other of said rollers including at least one notch configured to guide the substrate as it passes through the extrusion die and between the two rollers, wherein
• the impression and the at least one notch are disposed on the same roller,
• the impression is connected to and placed in between two notches of the at least one notch, and
• the two notches of the at least one notch have a shape complementary to a hollow tubular structure of the substrate, a recess of the hollow tubular structure forming a through hole configured to receive a bar allowing to hook horns of a watch case or a buckle.