Patent ID: 8689446
Filing Date: 2014-04-08
Classification: B29C,B33Y,G04B,G04D,Y10T

Abstract:
1. A method for producing a watch case middle having reduced weight, comprising: generating a 3-D data set as a model of the case middle, the model comprising at least one internal cavity within the case middle; converting the 3-D data set into a plurality of layers, each layer representing a cross-sectional layer of the middle; forming the case middle layer-by-layer from powdered material using an additive manufacturing process in order to provide the case middle with a unitary construction, including forming the at least one internal cavity; removing loose powder from each cavity via one or more powder evacuation holes formed between the cavity and an external surface of the case middle; and machining a through hole formed through the case middle to a desired finish and/or precision, the through hole being designed to receive a control member stem when a watch movement is mounted inside the case middle, wherein, in a completed watch, the case middle comprises the at least one internal cavity.