CA1030788A - Method of manufacturing a die designed to duplicate a video frequency signal recording - Google Patents

Method of manufacturing a die designed to duplicate a video frequency signal recording

Info

Publication number
CA1030788A
CA1030788A CA231,488A CA231488A CA1030788A CA 1030788 A CA1030788 A CA 1030788A CA 231488 A CA231488 A CA 231488A CA 1030788 A CA1030788 A CA 1030788A
Authority
CA
Canada
Prior art keywords
duplicate
manufacturing
frequency signal
signal recording
video frequency
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
CA231,488A
Other languages
English (en)
French (fr)
Other versions
CA231488S (en
Inventor
Jean C. Dubois
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Application granted granted Critical
Publication of CA1030788A publication Critical patent/CA1030788A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/005—Producing optically read record carriers, e.g. optical discs
    • 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
    • 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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
CA231,488A 1974-07-16 1975-07-15 Method of manufacturing a die designed to duplicate a video frequency signal recording Expired CA1030788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7424668A FR2278474A1 (fr) 1974-07-16 1974-07-16 Procede de fabrication d'une matrice destinee a la duplication d'un enregistrement de signaux en videofrequence, et matrice ainsi obtenue

Publications (1)

Publication Number Publication Date
CA1030788A true CA1030788A (en) 1978-05-09

Family

ID=9141325

Family Applications (1)

Application Number Title Priority Date Filing Date
CA231,488A Expired CA1030788A (en) 1974-07-16 1975-07-15 Method of manufacturing a die designed to duplicate a video frequency signal recording

Country Status (5)

Country Link
JP (1) JPS5135308A (Direct)
CA (1) CA1030788A (Direct)
FR (1) FR2278474A1 (Direct)
GB (1) GB1516121A (Direct)
IT (1) IT1039798B (Direct)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9400225A (nl) * 1994-02-14 1995-09-01 Od & Me Bv Werkwijze voor het zonder tussenkomst van een master vervaardigen van een stamper voor het voortbrengen van optische schijven.

Also Published As

Publication number Publication date
IT1039798B (it) 1979-12-10
FR2278474A1 (fr) 1976-02-13
FR2278474B1 (Direct) 1976-12-24
DE2531561A1 (de) 1976-02-05
DE2531561B2 (de) 1976-10-21
GB1516121A (en) 1978-06-28
JPS5135308A (ja) 1976-03-25

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