Marking heat-treated substrates
AssigneeSaint-Gobain Glass France
InventorsHubert Hauser, Herbert Stadelmann, Andreas Kasper
Life of this patent
Estimating the term…
Abstract
A method for visual marking of heat-treated substrates, in particular tempered glass panes. The method modifies a marking layer deposited on a surface of the substrate, that visually indicates that the heat treatment has been carried out, and produces a rough marking field on the surface of the substrate that the marking layer deposited on the substrate exhibits intimate adhesive bonding thereto, which marking layer cannot be completely removed using a mechanical mechanism.
Claims19
A method for visual marking glass panes that are tempered and then heat-treated, the method comprising:
- producing a marking field that includes an uneven surface structure on a limited area of a smooth side surface of a glass pane, wherein the limited area is smaller than a total area of the side surface of the glass pane, and wherein the uneven surface structure is more rough than portions of the side surface of the glass pane that are outside of the limited area of the side surface of the glass pane;
- depositing a marking layer on the marking field such that the marking layer penetrates intermediate spaces or hollows within the marking field so as to create an intimate adhesive bond between the marking layer and the marking field;
- and
- modifying the marking layer deposited on the marking field via heat treatment, wherein the marking layer visually indicates that the heat treatment has been carried out, and wherein the color of the marking layer is irreversibly modified by the heat treatment.
A method for visual marking glass panes that are tempered and then submitted to a heat-soak test, with a marking layer that visually indicates that the heat-soak-test has been carried out, the method comprising:
- producing, before the heat-soak-test, a marking field on a local portion of a surface of a side of a glass pane by a local modification, wherein the marking field comprises an uneven surface structure, wherein the local portion of the surface of the side of the glass pane is a limited surface area on the side of the glass pane that is smaller than a total surface area of the side of the glass pane;
- and
- depositing, after the tempering, a marking color on said marking field so as to produce the marking layer, wherein the marking color fills said uneven surface structure so as to create an intimate adhesive bond between the marking layer and the marking field.
A method for visually marking glass panes, the method comprising:
- providing a glass pane that includes a first face and a second face;
- locally modifying a surface of said first face of said glass pane so as to produce a marking field that includes an uneven surface that is more rough than portions of the surface of said first face that are not within said marking field;
- depositing a marking layer of thermochromic marking color on said marking field such that the marking layer penetrates intermediate spaces or hollows within the marking field so as to create an intimate adhesive bond between the marking layer and the marking field;
- and
- submitting, after the depositing the marking layer on said marking field, the glass pane to a heat-soak test that irreversibly modifies the thermochromic marking color.
Dependencies are inferred from the claim text.