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 recordingInfo
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title 1
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)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7424668A FR2278474A1 (en) | 1974-07-16 | 1974-07-16 | METHOD OF MANUFACTURING A MATRIX INTENDED FOR THE DUPLICATION OF A VIDEO-FREQUENCY SIGNAL RECORDING, AND A MATRIX SO OBTAINED |
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 (en) |
CA (1) | CA1030788A (en) |
FR (1) | FR2278474A1 (en) |
GB (1) | GB1516121A (en) |
IT (1) | IT1039798B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL9400225A (en) * | 1994-02-14 | 1995-09-01 | Od & Me Bv | Method for manufacturing a stamper for producing optical disks without the intervention of a master. |
-
1974
- 1974-07-16 FR FR7424668A patent/FR2278474A1/en active Granted
-
1975
- 1975-07-15 IT IT2540375A patent/IT1039798B/en active
- 1975-07-15 GB GB2970175A patent/GB1516121A/en not_active Expired
- 1975-07-15 CA CA231,488A patent/CA1030788A/en not_active Expired
- 1975-07-16 JP JP8714975A patent/JPS5135308A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2278474B1 (en) | 1976-12-24 |
FR2278474A1 (en) | 1976-02-13 |
IT1039798B (en) | 1979-12-10 |
DE2531561A1 (en) | 1976-02-05 |
DE2531561B2 (en) | 1976-10-21 |
JPS5135308A (en) | 1976-03-25 |
GB1516121A (en) | 1978-06-28 |
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