Heatable and coolable press mould - made of high compressive strength glass for thermoplastic video discs and other plate-like information carriers
Номер патента: DE2747797A1
Опубликовано: 26-04-1979
Автор(ы): Hermann Schaffner
Принадлежит: Polygram GmbH
Опубликовано: 26-04-1979
Автор(ы): Hermann Schaffner
Принадлежит: Polygram GmbH
Реферат: Plate-like information carriers, made of thermoplastic materials, for high-density optically scanned video or image discs, are produced in presses with moulds in which a cooling and a heating system are incorporated. The block mould is made of glass with a high compressive strength in which ducts for a coolant are enclosed. Heating wires are embedded close to the ace which carries the matrix with the surface structure for the information carrier. The glass surfaces can be ground to a surface roughness of 0.2 u which results in lesser scanning errors than when steel moulds are used.
Moulded product made of composite with reinforcing fibres
Номер патента: RU2551501C2. Автор: Митихару ТАНИГУТИ,Тору СУГИЯМА,Ютака ЯГИ,Ютака КОНДО,Юхен КОНАГАИ,Иккоу ФУРУКАВА. Владелец: Тейдзин Лимитед. Дата публикации: 2015-05-27.