Claims
- 1. A recording disk comprising: a substrate layer; at least one layer of recording material supported on the substrate layer, a stiffening structure fixed with respect to the substrate layer wherein said stiffening structure comprises a framework composed of:
- at least one inner annular rib;
- a plurality of outer annular ribs of greater diameter than said at least one inner annular rib and arranged concentric with each other and with said at least one inner annular rib;
- at least one radial rib connected to said plurality of outer annular ribs and free of direct connection with said at least one inner annular rib; and
- at least one radial rib connected to at least one inner annular rib and at least one outer annular rib.
- 2. A recording disk comprising: a substrate layer; at least one layer of recording material supported on the substrate layer, a stiffening structure fixed with respect to the substrate layer wherein said stiffening structure comprises a framework composed of:
- at least one inner annular rib;
- a plurality of outer annular ribs of greater diameter than said at least one inner annular rib and arranged concentric with each other and with said at least one inner annular rib;
- a first plurality of radial ribs connected to said plurality of outer annular ribs and free of direct connection with said at least one inner annular rib; and
- a second plurality of radial ribs connected to at least one inner annular rib and said plurality of outer annular ribs.
- 3. A recording disk comprising: a recording disk having a central hub, a substrate layer extending radially out from the central hub, at least one layer of recording material supported on the substrate layer and a stiffening structure fixed with respect to the substrate layer;
- a rotatable spindle defining a rotation axis, wherein said spindle is coupled to said central hub of said disk for imparting rotary motion to said disk; and
- a driver for rotatably driving the spindle and disk about the rotation axis of said spindle, wherein said stiffening structure comprises a framework composed of:
- at least one inner annular rib;
- a plurality of outer annular ribs of greater diameter than said at least one inner annular rib and arranged concentric with each other and with said at least one inner annular rib;
- at least one radial rib connected to said plurality of outer annular ribs and free of direct connection with said at least one inner annular rib; and
- at least one radial rib connected to at least one inner annular rib and at least one outer annular rib.
- 4. A recording disk comprising: a recording disk having a central hub, a substrate layer extending radially out from the central hub, at least one layer of recording material supported on the substrate layer and a stiffening structure fixed with respect to the substrate layer;
- a rotatable spindle defining a rotation axis, wherein said spindle is coupled to said central hub of said disk for imparting rotary motion to said disk; and
- a driver for rotatably driving the spindle and disk about the rotation axis of said spindle, wherein said stiffening structure comprises a framework composed of:
- at least one inner annular rib;
- a plurality of outer annular ribs of greater diameter than said at least one inner annular rib and arranged concentric with each other and with said at least one inner annular rib;
- a first plurality of radial ribs connected to said plurality of outer annular ribs and free of direct connection with said at least one inner annular rib; and
- a second plurality of radial ribs connected to at least one inner annular rib and said plurality of outer annular ribs.
Parent Case Info
This application is a National Stage of International Application No. PCT/US98/09900, filed May 22, 1998, which claims the benefit of U.S. Provisional application No. 60/053,473, filed Jul. 23 1997.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US98/09900 |
5/22/1998 |
|
|
6/17/1999 |
6/17/1999 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO99/05672 |
2/4/1999 |
|
|
US Referenced Citations (6)