JPS5746364A - Disk reproducer - Google Patents
Disk reproducerInfo
- Publication number
- JPS5746364A JPS5746364A JP55123157A JP12315780A JPS5746364A JP S5746364 A JPS5746364 A JP S5746364A JP 55123157 A JP55123157 A JP 55123157A JP 12315780 A JP12315780 A JP 12315780A JP S5746364 A JPS5746364 A JP S5746364A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- center
- center hole
- carried out
- eccentricity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To minimize the eccentricity of a track on every face of a disk, by changing the form of a center shaft of a turntable and at the same time carrying out the blanking of the center hole of the disk prior to stucking the disk.
CONSTITUTION: A center shaft 8 which is fitted into a center hole of a disk 7 mounted on turntable 6 has a large diameter at a fitting part 9 at the root part and a small diameter at a fitting part 10 at the tip part respectively. The center positioning of the disk 7 is carried out through the part 9. For the disk 7, the center hole is blanked at a position were the eccentricity of the track becomes minimum for disks 1A and 1B respectively. Then these disks 1A and 1B are stuck back to back with an adhesive, and the center positioning is carried out through a center hole 7B of the disk 1B under reproduction and the part 9. While a center hole 7A on the surface of the disk 1A is fitted to the part 9 when the disk 7 is turned over. In such a way, the center positioning is always carried out on the basis of a reproducing surface.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55123157A JPS5746364A (en) | 1980-09-04 | 1980-09-04 | Disk reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55123157A JPS5746364A (en) | 1980-09-04 | 1980-09-04 | Disk reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5746364A true JPS5746364A (en) | 1982-03-16 |
Family
ID=14853583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55123157A Pending JPS5746364A (en) | 1980-09-04 | 1980-09-04 | Disk reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5746364A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6138602A (en) * | 1984-07-31 | 1986-02-24 | Asahi Chem Ind Co Ltd | Washing liquid for removing deposited water |
JPS61182928U (en) * | 1985-05-01 | 1986-11-14 | ||
WO1996030906A1 (en) * | 1995-03-30 | 1996-10-03 | Victor Company Of Japan, Ltd. | Information recording disk |
-
1980
- 1980-09-04 JP JP55123157A patent/JPS5746364A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6138602A (en) * | 1984-07-31 | 1986-02-24 | Asahi Chem Ind Co Ltd | Washing liquid for removing deposited water |
JPS61182928U (en) * | 1985-05-01 | 1986-11-14 | ||
WO1996030906A1 (en) * | 1995-03-30 | 1996-10-03 | Victor Company Of Japan, Ltd. | Information recording disk |
US6038208A (en) * | 1995-03-30 | 2000-03-14 | Victor Company Of Japan, Ltd. | Information recording disc recorded with signals at two different recording densities |
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