GB2035661B - Disc record having flat-top playing surface - Google Patents

Disc record having flat-top playing surface

Info

Publication number: GB2035661B
Authority: GB; United Kingdom
Prior art keywords: flat; playing surface; disc record; top playing; record
Prior art date: 1978-11-16
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.): Expired

Application number

GB7938947A

Other versions

GB2035661A (en

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.)

RCA Corp

Original Assignee

RCA 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.)

1978-11-16

Filing date

1979-11-09

Publication date

1983-02-09

1979-11-09 Application filed by RCA Corp filed Critical RCA Corp

1980-06-18 Publication of GB2035661A publication Critical patent/GB2035661A/en

1983-02-09 Application granted granted Critical

1983-02-09 Publication of GB2035661B publication Critical patent/GB2035661B/en

Status Expired legal-status Critical Current

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
- G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/68—Record carriers
- G11B3/685—Intermediate mediums
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/68—Record carriers
- G11B3/72—Groove formations, e.g. run-in groove, run-out groove

GB7938947A 1978-11-16 1979-11-09 Disc record having flat-top playing surface Expired GB2035661B (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB7844736		1978-11-16
US4292179A	1979-05-29	1979-05-29

Publications (2)

Publication Number	Publication Date
GB2035661A GB2035661A (en)	1980-06-18
GB2035661B true GB2035661B (en)	1983-02-09

Family

ID=26269597

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB7938947A Expired GB2035661B (en)	1978-11-16	1979-11-09	Disc record having flat-top playing surface

Country Status (2)

Country	Link
DE (1)	DE2946330A1 (en)
GB (1)	GB2035661B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS56117341A (en) *	1980-02-18	1981-09-14	Toshiba Corp	Optical disk and its manufacture

1979
- 1979-11-09 GB GB7938947A patent/GB2035661B/en not_active Expired
- 1979-11-16 DE DE19792946330 patent/DE2946330A1/en not_active Withdrawn

Also Published As

Publication number	Publication date
GB2035661A (en)	1980-06-18
DE2946330A1 (en)	1980-05-29

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Legal Events

Date	Code	Title	Description
1985-07-03	PCNP	Patent ceased through non-payment of renewal fee