Process for manufacturing optical disks by pressing
US4659407A · kind A · utility
17Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1984 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jul 2, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1044
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a process for manufacturing optical disks by pressing and disks obtained by such a process, for improving the inherent flatness of the optical disk of the thick type, obtained by a process of pressing between a recorded master and another master, recorded or not depending on whether it is a question of a single or double side disk, this latter being formed from a stack of at least two thin sheets of thermoformable material subjected to a pressure-temperature cycle after which bonding together of the sheets and duplication of the information from the masters for information recording are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.