Chemistry: electrical and wave energy – Processes and products
Patent
1974-11-25
1976-11-02
Miller, Jr., George H.
Chemistry: electrical and wave energy
Processes and products
29177, 58127R, B44C 104, B23P 1300, G04B 1906
Patent
active
039896030
ABSTRACT:
A method of manufacturing a watch dial with symbols in relief wherein a plate of aluminum-base material, not yet provided with reliefs, first undergoes a basic anodizing treatment, then relief elements are formed by an embossing operation so that the aluminum-base material of the plate appears, free of oxidizing, on all visible side surfaces of the embossed relief elements, the tenacious nature of the anodizing ensuring a clear and crackless demarcation between these bared side surfaces and the remaining anodized surface of the plate. The oxidized layer is then removed from the upper surface of the relief elements so that both the upper and side surfaces of each relief element are bared. A second anodizing treatment is then applied to the bared surfaces for imparting to them a particular aspect, different from the one given by the basic anodizing, thus confering upon these relief elements the appearance of real appliques.
REFERENCES:
patent: 2071240 (1937-02-01), Spencer et al.
patent: 2594820 (1952-04-01), Stern
patent: 2604418 (1952-07-01), Stern
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