FR2140243A1 - - Google Patents
Info
- Publication number
- FR2140243A1 FR2140243A1 FR7220512A FR7220512A FR2140243A1 FR 2140243 A1 FR2140243 A1 FR 2140243A1 FR 7220512 A FR7220512 A FR 7220512A FR 7220512 A FR7220512 A FR 7220512A FR 2140243 A1 FR2140243 A1 FR 2140243A1
- Authority
- FR
- France
- 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.)
- Granted
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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/488—Disposition of heads
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1272—Assembling or shaping of elements
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/147—Structure or manufacture of heads, e.g. inductive with cores being composed of metal sheets, i.e. laminated cores with cores composed of isolated magnetic layers, e.g. sheets
- G11B5/1475—Assembling or shaping of elements
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/21—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being of ferrous sheet metal or other magnetic layers
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14997371A | 1971-06-04 | 1971-06-04 | |
US14997471A | 1971-06-04 | 1971-06-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2140243A1 true FR2140243A1 (fr) | 1973-01-12 |
FR2140243B1 FR2140243B1 (fr) | 1978-03-03 |
Family
ID=26847199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7220512A Expired FR2140243B1 (fr) | 1971-06-04 | 1972-06-01 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2218969A1 (fr) |
FR (1) | FR2140243B1 (fr) |
GB (1) | GB1372474A (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2393395A1 (fr) * | 1977-03-24 | 1978-12-29 | Indep Broadcasting Authority | Appareil d'enregistrement et de lecture magnetique |
FR2463967A1 (fr) * | 1979-08-23 | 1981-02-27 | Rca Corp | Tete magnetique multicanaux pour systeme enregistreur-lecteur |
FR2508216A1 (fr) * | 1981-06-19 | 1982-12-24 | Thomson Csf | Tete magnetique pour ecriture, lecture et effacement sur piste magnetique etroite, et procede de fabrication de cette tete magnetique, simple ou multipiste |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5634128A (en) * | 1979-08-23 | 1981-04-06 | Rca Corp | Multiple magnetic head for record*reproduction device |
-
1972
- 1972-04-19 DE DE19722218969 patent/DE2218969A1/de active Pending
- 1972-05-15 GB GB2266072A patent/GB1372474A/en not_active Expired
- 1972-06-01 FR FR7220512A patent/FR2140243B1/fr not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2393395A1 (fr) * | 1977-03-24 | 1978-12-29 | Indep Broadcasting Authority | Appareil d'enregistrement et de lecture magnetique |
FR2463967A1 (fr) * | 1979-08-23 | 1981-02-27 | Rca Corp | Tete magnetique multicanaux pour systeme enregistreur-lecteur |
FR2508216A1 (fr) * | 1981-06-19 | 1982-12-24 | Thomson Csf | Tete magnetique pour ecriture, lecture et effacement sur piste magnetique etroite, et procede de fabrication de cette tete magnetique, simple ou multipiste |
EP0068995A1 (fr) * | 1981-06-19 | 1983-01-05 | Thomson-Csf | Tête magnétique pour écriture, lecture et effacement sur piste magnétique étroite, et procédé de fabrication de cette tête magnétique, simple ou multipiste |
Also Published As
Publication number | Publication date |
---|---|
DE2218969A1 (de) | 1973-04-12 |
GB1372474A (en) | 1974-10-30 |
FR2140243B1 (fr) | 1978-03-03 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |