JPS5473605A - Azimuth recording method using double film - Google Patents
Azimuth recording method using double filmInfo
- Publication number
- JPS5473605A JPS5473605A JP14060677A JP14060677A JPS5473605A JP S5473605 A JPS5473605 A JP S5473605A JP 14060677 A JP14060677 A JP 14060677A JP 14060677 A JP14060677 A JP 14060677A JP S5473605 A JPS5473605 A JP S5473605A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic field
- coercive force
- low
- recorded
- 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.)
- Pending
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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
PURPOSE:To prevent from picking up other signal when reading out one signal due to azimuth loss, by providing double film medium having low coercive force film in the upper layer and high coercive force film in the lower layer, and writing in at an azimuth angle in high magnetic field in the lower layer and low magnetic field in the upper layer. CONSTITUTION:A double film recording medium is composed with high coercive force magnetic film 4 in the lower layer and low coercive force magnetic film 5 in the upper layer. First signals are recorded into the both magnetic film in high magnetic field by inclining the recording head by 1/2 of the azimuth angle phi. Then, inclining the recording head in the reverse direction by 1/2 of the azimuth angle phi, and signals are recorded in low magnetic field. Thus, since the medium 4 of the lower layer has high corcive force, it is not influenced by low magnetic field, and the previous pattern 6 remains as it has been. On the other hand, since the upper layer film body 5 has low coercive force, the previous recording is erased even if signals are recorded in low magnetic field, and a new recording pattern 7 will be recorded. By adjusting the gap of the reading head to the angle of pattern 7 of film body 5 when reading out, the record 6 on the film body 4 may not be read out by the azimuth loss, and only the record 7 on the film body 5 will be read out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14060677A JPS5473605A (en) | 1977-11-25 | 1977-11-25 | Azimuth recording method using double film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14060677A JPS5473605A (en) | 1977-11-25 | 1977-11-25 | Azimuth recording method using double film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5473605A true JPS5473605A (en) | 1979-06-13 |
Family
ID=15272609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14060677A Pending JPS5473605A (en) | 1977-11-25 | 1977-11-25 | Azimuth recording method using double film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5473605A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61276102A (en) * | 1985-05-31 | 1986-12-06 | Sony Corp | Recording system for memory magnetic disk |
JPH03130197A (en) * | 1988-12-21 | 1991-06-03 | Dainippon Printing Co Ltd | Manufacture of magnetic card |
JPH03130920A (en) * | 1988-12-21 | 1991-06-04 | Dainippon Printing Co Ltd | Magnetic card |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5083003A (en) * | 1973-11-21 | 1975-07-04 |
-
1977
- 1977-11-25 JP JP14060677A patent/JPS5473605A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5083003A (en) * | 1973-11-21 | 1975-07-04 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61276102A (en) * | 1985-05-31 | 1986-12-06 | Sony Corp | Recording system for memory magnetic disk |
JPH03130197A (en) * | 1988-12-21 | 1991-06-03 | Dainippon Printing Co Ltd | Manufacture of magnetic card |
JPH03130920A (en) * | 1988-12-21 | 1991-06-04 | Dainippon Printing Co Ltd | Magnetic card |
JPH05770B2 (en) * | 1988-12-21 | 1993-01-06 | Dainippon Printing Co Ltd | |
JPH0552797B2 (en) * | 1988-12-21 | 1993-08-06 | Dainippon Printing Co Ltd |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU577353B2 (en) | Read - write head structure | |
WO1996019799A3 (en) | Recording head for recording track-centering servo signals on a multi-track recording medium | |
KR840000939A (en) | Magnetic recording and playback device | |
JPS5363002A (en) | Signal recording system and disk type medium for recording signal | |
GB1525292A (en) | Identification of records | |
JPS5473605A (en) | Azimuth recording method using double film | |
JPS5396805A (en) | Recording-reproducing method of signals | |
GB2060980A (en) | Signal recording/reproducing device | |
JPS5727447A (en) | Signal recording and reproducing system | |
JPS53149308A (en) | Recorder-reproducer of digital signals | |
JPS6457409A (en) | Floppy disk device | |
JPS53124408A (en) | Magnetic recorder and reproducer | |
JPS5317715A (en) | Magnetic recorder/reproducer | |
JPS53138314A (en) | Magnetic recording system | |
JPS52123222A (en) | Information disk reproducing system | |
JPS5391716A (en) | Magnetic head | |
JPS5358219A (en) | Thin film magnetic head assembly | |
JPS5359405A (en) | High-frequency bias magnetic recording ststem | |
JPS55153142A (en) | Magnetic recording and reproducing device | |
JPS5374408A (en) | Tape recorder | |
JPS5356919A (en) | Recording and reproducing unit of video signal and sound signal | |
Jeffers | Overwrite as a function of record gap length | |
JPS6484486A (en) | Magnetic recording/reproducing device and magnetic head | |
JPS5398814A (en) | Grooveless medium disc for information recording | |
JPS5462810A (en) | Recording-reproducing system |