Gaming machine and display device therefor

• US 20040152501A1
• Filed: 11/19/2003
• Published: 08/05/2004
• Est. Priority Date: 11/20/2002
• Status: Active Grant

• Current Assignee: Kazuo Okada
• Original Assignee: Universal Entertainment Corporation
• Inventors: Okada, Kazuo
• Granted Patent: US 7,972,206 B2
• Time in Patent Office: Days
• US Class Current: 463/16
• CPC Class Codes: G07F 17/3202 Hardware aspects of a gaming system, e.g. components, construction, architecture thereof
• CPC Class Codes: G07F 17/3211 Display means

Abstract

In an optical disk, a recording film and a reflection film have different inner diameters. The optical disk includes a printed label having an inner diameter greater than the inner diameter of the reflection film. The inner diameter of the label is smaller than that of the recording film. An adhesive layer is directly in contact with first and second substrates. Therefore, sufficient adhesion strength is assured.

Claims

1. A rewritable laminated optical disk having a first substrate including a rewritable recording film and a reflection film which reflects light radiated from the recording film, and a second substrate including a visible information indicating region, the first and second substrates being adhered to each other by an adhesive layer, wherein

the recording film in the first substrate has an inner periphery having a radius of 16 mm to 24 mm, and the reflection film has an inner periphery having a radius of 11 mm to 15 mm.

2. The optical disk according to claim 1, wherein the visible information indicating region in the second substrate has an inner periphery of a radius smaller than that of the recording film and greater than that of the reflection film.

3. The optical disk according to claim 2, wherein the inner periphery of the visible information indicating region is greater than that of the reflection film by a margin defined in consideration of an amount of deviation which occurs in a printing process.

4. A recording medium comprising:

a first substrate, a reflection film which reflects light and has an inner periphery at a predetermined distance outside from a central hole and a recording film which records information upon radiation of light thereon and has an inner periphery at a predetermined distance outside from the reflection film;

a second substrate having an opening substantially concentric to the central hole of the first substrate and substantially same in diameter as the central hole, and a visible information indicating region which has an inner periphery at a predetermined distance outside from the reflection film; and

an adhesive layer which is interposed between the first and second substrates and adheres the first and second substrates such that the opening substantially coincides with the central hole.

5. The recording medium according to claim 4,

wherein the inner periphery of the visible information indicating region in the second substrate is defined inside the inner periphery of the recording film in the first substrate and outside the inner periphery of the reflection film in the first substrate.

6. The recording medium according to claim 4,

wherein the inner periphery of the visible information indicating region in the second substrate is greater than that of the reflection film by a margin defined in consideration of an amount of deviation which occurs in a printing process.

7. The recording medium according to claim 4,

wherein the inner periphery of the visible information indicating region in the second substrate has a radius at least 1 mm greater than that of the reflection film in the first substrate.

8. An optical disk manufacturing method for manufacturing an optical disk of rewritable laminated type, comprising:

forming a recording film on a first substrate with a first mask covering at least a central hole of the optical disk; and

forming a reflection film on the first substrate with a second mask covering at least the central hole and having a radius different from that of the first mask.

9. The optical disk manufacturing method according to claim 8, wherein the first mask for use in forming the recording film has a radius greater than that of the second mask for use in forming the reflection film.

10. The optical disk manufacturing method according to claim 8, wherein the second mask for use in forming the reflection film is greater in radius than the central hole and smaller in radius than an inner periphery of a visible information recording region of a second substrate to be laminated on the first substrate.

11. An optical disk manufacturing method comprising:

forming a first thin film on a first substrate having predetermined outer and inner diameters with a first mask of a first radius arranged near a central hole of the first substrate, the first substrate having pits corresponding to physical information and a guide groove;

forming a second thin film on the first substrate with a second mask in place of the first mask, the second mask having a second radius smaller than the first radius;

applying a predetermined amount of adhesive to at least one of the second thin film and an exposed portion of the first substrate;

superposing a second substrate on the first substrate in association with the central hole of the first substrate and hardening the adhesive; and

recording visible information on a non-adhesive surface of the second substrate, thereby forming a visible information indicating region.

12. The optical disk manufacturing method according to claim 11, wherein the visible information indicating region has an inner periphery of a radius greater than that of the second radius.

13. The optical disk manufacturing method according to claim 11, wherein the visible information indicating region has a diameter smaller than that of the first mask.

14. A recording medium manufacturing method comprising:

forming a first thin film on a first substrate having predetermined outer and inner diameters with a first mask of a first radius arranged near a central hole of the first substrate;

thereafter exchanging the first mask with a second mask having a second radius smaller than the first radius; and

thereafter forming a second thin film on the first substrate.

15. The recording medium manufacturing method according to claim 14, wherein the first thin film is a rewritable recording film and the second thin film is a reflection film.