JPS5746364A - Disk reproducer - Google Patents

Disk reproducer

Info

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
Application number
JP55123157A
Other languages
Japanese (ja)
Inventor
Akira Oinuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55123157A priority Critical patent/JPS5746364A/en
Publication of JPS5746364A publication Critical patent/JPS5746364A/en
Pending legal-status Critical Current

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
JP55123157A 1980-09-04 1980-09-04 Disk reproducer Pending JPS5746364A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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