Prodn. of curved watch housing parts made eg. of brass or steel or gold or platinum

摘要

The curved watch housing parts to match the human wrist are produced using strip material. It is reduced to a final thickness, using a roller system with two driven rollers (21) adjustable in their spacing, and a third roller (23) adjustable in its distance to the driven rollers, a further process is carried out to separate the curved strip. The distance of the roller system for the prodn. of the curved metal strips is so adjusted, that the roller distance of the two driven rollers, approximates to the metal strip thickness, and the distance of the third roller from the connecting line of the roller central points of the driven rollers is matched to the desired curvature radius.