CA918292A - Video record disc and process for making same - Google Patents

Video record disc and process for making same

Info

Publication number
CA918292A
CA918292A CA049304A CA49304A CA918292A CA 918292 A CA918292 A CA 918292A CA 049304 A CA049304 A CA 049304A CA 49304 A CA49304 A CA 49304A CA 918292 A CA918292 A CA 918292A
Authority
CA
Canada
Prior art keywords
making same
video record
record disc
disc
video
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.)
Expired
Application number
CA049304A
Other languages
English (en)
Other versions
CA49304S (en
Inventor
P. Gregg David
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.)
MCA TECHNOLOGY
Original Assignee
MCA TECHNOLOGY
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 MCA TECHNOLOGY filed Critical MCA TECHNOLOGY
Application granted granted Critical
Publication of CA918292A publication Critical patent/CA918292A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • 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
CA049304A 1968-06-06 1969-04-21 Video record disc and process for making same Expired CA918292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73500768A 1968-06-06 1968-06-06

Publications (1)

Publication Number Publication Date
CA918292A true CA918292A (en) 1973-01-02

Family

ID=24953958

Family Applications (1)

Application Number Title Priority Date Filing Date
CA049304A Expired CA918292A (en) 1968-06-06 1969-04-21 Video record disc and process for making same

Country Status (6)

Country Link
JP (1) JPS555177B1 (enrdf_load_stackoverflow)
CA (1) CA918292A (enrdf_load_stackoverflow)
DE (1) DE1904920C3 (enrdf_load_stackoverflow)
FR (1) FR1601186A (enrdf_load_stackoverflow)
GB (1) GB1214340A (enrdf_load_stackoverflow)
NL (1) NL6900541A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2197495A5 (enrdf_load_stackoverflow) * 1972-08-25 1974-03-22 Thomson Csf
NL165316C (nl) * 1973-10-01 1981-03-16 Mca Disco Vision Werkwijze voor de vervaardiging van een schrijfvormige video-afdrukmatrijs uitgaande van een moederschijf.
FR2310586A1 (fr) * 1975-05-07 1976-12-03 Thomson Brandt Procede de fabrication de supports d'informations lisibles optiquement par variation d'absorption et support ainsi obtenu
US6764734B2 (en) * 1998-05-19 2004-07-20 Seagate Technology Llc High modulus and high damping plastic composite disc substrate for improved servo control by injection and co-injection molding

Also Published As

Publication number Publication date
GB1214340A (en) 1970-12-02
NL6900541A (enrdf_load_stackoverflow) 1969-12-09
FR1601186A (enrdf_load_stackoverflow) 1970-08-10
DE1904920C3 (de) 1975-06-12
DE1904920B2 (de) 1974-10-24
JPS555177B1 (enrdf_load_stackoverflow) 1980-02-04
DE1904920A1 (de) 1971-02-18

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