GB1377447A - Apparatus for replicating magnetic recordings - Google Patents
Apparatus for replicating magnetic recordingsInfo
- Publication number
- GB1377447A GB1377447A GB850472A GB850472A GB1377447A GB 1377447 A GB1377447 A GB 1377447A GB 850472 A GB850472 A GB 850472A GB 850472 A GB850472 A GB 850472A GB 1377447 A GB1377447 A GB 1377447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- unrecorded
- recorded
- layer
- medium
- drum
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
- G11B5/865—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by contact "printing"
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
Abstract
1377447 Copying magnetic recordings RCA CORPORATION 24 Feb 1972 [2 March 1971] 8504/72 Heading G5R A pre-recorded magnetic medium such as a tape 12 is copied on to an unrecorded magnetic medium such as a drum 26 by placing the particle layers 12a, 32 of each medium in intimate contact and heating the particles of the unrecorded layer 32 to their Curie point by means of a focused beam 36 of radiant energy, such as a laser beam, the size of the focused spot being of the same order as the largest particles of layer 32, the spot being deflected to scan the unrecorded layer 32. Layer 32 becomes magnetized by the field of recorded layer 12a upon cooling. The Curie point of the unrecorded medium should be lower than that of the recorded medium. As shown, the recorded tape 12 is driven in contact with the drum 26, to which the recording is transferred and then recorded therefrom on to a second tape 42 by an identical process. The recording is then erased from the drum 26 at 56. The spot scanning direction is transverse to the direction of motion. The substrates 30, 42b of the unrecorded media are transparent to the radiation, e.g. glass or quartz for 30, oriented polyethylene terephthalate for 42b. The particle binder, such as polyurethane, includes a darkcoloured material such as carbon black to increase radiation absorption.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12014971A | 1971-03-02 | 1971-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1377447A true GB1377447A (en) | 1974-12-18 |
Family
ID=22388540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB850472A Expired GB1377447A (en) | 1971-03-02 | 1972-02-24 | Apparatus for replicating magnetic recordings |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5210369B1 (en) |
| CA (1) | CA983162A (en) |
| DE (1) | DE2209811C3 (en) |
| FR (1) | FR2128368B1 (en) |
| GB (1) | GB1377447A (en) |
| IT (1) | IT948020B (en) |
| NL (1) | NL7202702A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55129908A (en) * | 1979-03-15 | 1980-10-08 | Olympus Optical Co Ltd | Thermomagnetic recording and reproducing device |
| JPS55129909A (en) * | 1979-03-22 | 1980-10-08 | Olympus Optical Co Ltd | Thermomagnetic recording and reproducing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3496304A (en) * | 1966-12-05 | 1970-02-17 | Magnavox Co | Double transfer curie-point and magnetic bias tape copy system |
| US3541577A (en) * | 1967-06-28 | 1970-11-17 | Bell & Howell Co | Method of curie point recording |
-
1972
- 1972-02-24 GB GB850472A patent/GB1377447A/en not_active Expired
- 1972-02-24 CA CA135,543A patent/CA983162A/en not_active Expired
- 1972-02-25 FR FR7206542A patent/FR2128368B1/fr not_active Expired
- 1972-02-29 IT IT2121972A patent/IT948020B/en active
- 1972-03-01 DE DE19722209811 patent/DE2209811C3/en not_active Expired
- 1972-03-01 NL NL7202702A patent/NL7202702A/xx not_active Application Discontinuation
- 1972-03-02 JP JP2190772A patent/JPS5210369B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7202702A (en) | 1972-09-05 |
| DE2209811C3 (en) | 1974-09-26 |
| IT948020B (en) | 1973-05-30 |
| DE2209811B2 (en) | 1974-02-21 |
| FR2128368A1 (en) | 1972-10-20 |
| CA983162A (en) | 1976-02-03 |
| FR2128368B1 (en) | 1975-03-21 |
| JPS5210369B1 (en) | 1977-03-23 |
| DE2209811A1 (en) | 1972-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |