Moulded plastics watch case - has thin transparent zone forming watch glass which is integral with remainder of thick watch case
Реферат: The watch case is made of moulded plastics, so as to form a shell for receiving a watch movement and an overlying zone, which is sufficiently thin to be transparent, acting as the watch glass. The latter transparent zone forming the watch glass has a thickness of between 1 and 3 millimetres. The watch case is pref. made from a polyacrylic or polycarbonate resin, having a good thermal resistance, e.g. makrolon (RTM).
Plastic or electroformed watch case with removable crystal
Номер патента: US09618904B2. Автор: Vincent MEYER,Ines Rüstenberg,Thierry Altenhoven. Владелец: ETA SA Manufacture Horlogere Suisse. Дата публикации: 2017-04-11.