JPS5252602A - Record disc - Google Patents

Record disc

Info

Publication number
JPS5252602A
JPS5252602A JP50128167A JP12816775A JPS5252602A JP S5252602 A JPS5252602 A JP S5252602A JP 50128167 A JP50128167 A JP 50128167A JP 12816775 A JP12816775 A JP 12816775A JP S5252602 A JPS5252602 A JP S5252602A
Authority
JP
Japan
Prior art keywords
record disc
forming
reduce costs
record
central portion
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.)
Granted
Application number
JP50128167A
Other languages
Japanese (ja)
Other versions
JPS5729763B2 (en
Inventor
Taiji Tsunoda
Isao Iida
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP50128167A priority Critical patent/JPS5252602A/en
Publication of JPS5252602A publication Critical patent/JPS5252602A/en
Publication of JPS5729763B2 publication Critical patent/JPS5729763B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To improve plane accuracy and reduce costs, by forming a record disc thicker from the central portion toward the peripheral portion.
JP50128167A 1975-10-24 1975-10-24 Record disc Granted JPS5252602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50128167A JPS5252602A (en) 1975-10-24 1975-10-24 Record disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50128167A JPS5252602A (en) 1975-10-24 1975-10-24 Record disc

Publications (2)

Publication Number Publication Date
JPS5252602A true JPS5252602A (en) 1977-04-27
JPS5729763B2 JPS5729763B2 (en) 1982-06-24

Family

ID=14978041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50128167A Granted JPS5252602A (en) 1975-10-24 1975-10-24 Record disc

Country Status (1)

Country Link
JP (1) JPS5252602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269827U (en) * 1985-10-18 1987-05-01
US6130807A (en) * 1997-12-05 2000-10-10 Seagate Technology Llc Information storage disc having a curved disc surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269827U (en) * 1985-10-18 1987-05-01
JPH0519849Y2 (en) * 1985-10-18 1993-05-25
US6130807A (en) * 1997-12-05 2000-10-10 Seagate Technology Llc Information storage disc having a curved disc surface

Also Published As

Publication number Publication date
JPS5729763B2 (en) 1982-06-24

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