GB1257281A - - Google Patents
Info
- Publication number
- GB1257281A GB1257281A GB1257281DA GB1257281A GB 1257281 A GB1257281 A GB 1257281A GB 1257281D A GB1257281D A GB 1257281DA GB 1257281 A GB1257281 A GB 1257281A
- Authority
- GB
- United Kingdom
- Prior art keywords
- skin
- density
- brass
- heading
- april
- 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
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
Landscapes
- Magnetic Record Carriers (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Paints Or Removers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Rotational Drive Of Disk (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81438469A | 1969-04-08 | 1969-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1257281A true GB1257281A (US07166745-20070123-C00016.png) | 1971-12-15 |
Family
ID=25214908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1257281D Expired GB1257281A (US07166745-20070123-C00016.png) | 1969-04-08 | 1970-02-24 |
Country Status (8)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0131895A1 (en) * | 1983-07-19 | 1985-01-23 | Hitachi Metals, Ltd. | Magnetic disk substrate |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3964101A (en) * | 1973-06-15 | 1976-06-15 | Tetsuo Hino | Magnetic recording disc |
| ATE7971T1 (de) * | 1980-09-06 | 1984-06-15 | International Business Machines Corporation | Magnetplatten-traegerkern aus faserverstaerktem kunststoff. |
| ATE27663T1 (de) * | 1981-07-23 | 1987-06-15 | Ibm | Magnetplattensubstrat mit aus kunststoff bestehendem kern. |
| US4558383A (en) * | 1983-06-30 | 1985-12-10 | International Business Machines Corporation | Information storage disk transducer position control system using a prerecorded servo pattern requiring no alignment with the storage disk |
| US4680211A (en) * | 1985-07-25 | 1987-07-14 | The Dow Chemical Company | Recording disks |
| JP3935976B2 (ja) * | 1995-02-08 | 2007-06-27 | ヒューレット・パッカード・カンパニー | 半導体層構造および大容量メモリ装置の記録媒体 |
| US6055140A (en) * | 1997-07-25 | 2000-04-25 | Seagate Technology, Inc. | Rigid disc plastic substrate with high stiffness insert |
| US7227717B1 (en) * | 2001-06-18 | 2007-06-05 | Seagate Technology Llc | Asymmetric disk surface properties in one head disk drives |
| FR2845513B1 (fr) * | 2002-10-03 | 2006-08-11 | Commissariat Energie Atomique | Dispositif d'enregistrement de donnees comportant un support de memoire en forme de membrane |
| FR2845512A1 (fr) * | 2002-10-03 | 2004-04-09 | Commissariat Energie Atomique | Dispositif d'enregistrement de donnees comportant un support de memoire en forme de membrane |
-
1969
- 1969-04-08 US US814384A patent/US3646533A/en not_active Expired - Lifetime
-
1970
- 1970-02-23 CA CA075503A patent/CA925613A/en not_active Expired
- 1970-02-24 GB GB1257281D patent/GB1257281A/en not_active Expired
- 1970-03-05 JP JP45018398A patent/JPS4842489B1/ja active Pending
- 1970-04-04 DE DE2016178A patent/DE2016178C3/de not_active Expired
- 1970-04-07 FR FR7012520A patent/FR2043026A5/fr not_active Expired
- 1970-04-08 BE BE748680D patent/BE748680A/xx not_active IP Right Cessation
- 1970-04-08 NL NL7005043A patent/NL7005043A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0131895A1 (en) * | 1983-07-19 | 1985-01-23 | Hitachi Metals, Ltd. | Magnetic disk substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2043026A5 (US07166745-20070123-C00016.png) | 1971-02-12 |
| JPS4842489B1 (US07166745-20070123-C00016.png) | 1973-12-13 |
| BE748680A (fr) | 1970-09-06 |
| DE2016178C3 (de) | 1974-07-25 |
| US3646533A (en) | 1972-02-29 |
| NL7005043A (US07166745-20070123-C00016.png) | 1970-10-12 |
| DE2016178A1 (de) | 1970-11-12 |
| CA925613A (en) | 1973-05-01 |
| DE2016178B2 (de) | 1973-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |