Die, manufacturing method of an optical disk, and an optical disk
US7823532B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2006 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/263
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The die as provided is a die in which an upper block is placed on an upper surface of a lower block with a lower surface of the upper block in contact with the upper surface, wherein the lower block includes a manifold and a slit serving as a path for discharging paint from the manifold to the outside, constituted respectively from between the lower block and the lower surface of the upper block by forming a cavity and a space which communicates with the outside from this cavity along a columnar direction, respectively, from one end face of a columnar body with a trapezoidal shape of cross section to the other end face, a paint supply path which communicates with the manifold is formed from an outer side located between the one end face and the other end face of the lower block, a slit space dimension of the slit between front end portions in a paint discharge direction of the lower block and the upper block in a discharge port serving as an open end to the outside is smallest on the one end face side and increases toward the other end face side, and a slit length which is a dimension along the paint discharge direction of a space forming surface of the lower block constituting the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.