GB886144A - Improvements in and relating to methods of manufacturing magnetic tape - Google Patents
Improvements in and relating to methods of manufacturing magnetic tapeInfo
- Publication number
- GB886144A GB886144A GB27812/60A GB2781260A GB886144A GB 886144 A GB886144 A GB 886144A GB 27812/60 A GB27812/60 A GB 27812/60A GB 2781260 A GB2781260 A GB 2781260A GB 886144 A GB886144 A GB 886144A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- binder
- tape
- radiation
- medium
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
- G11B5/7026—Radiation curable polymers
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
886,144. Magnetic structures. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 11, 1960 [Aug. 26, 1959], No. 27812/60. Class 38 (2). A magnetic recording medium has its magnetic constituent held by a rubbery polymeric binder which is cured by sub-atomic radiation providing an absorption of 0.5 to 2.0 megarads in the medium. The medium may be a tape having a polyethylene terephthalate backing bearing fine acicular ferric oxide particles embedded in a binder including a butadiene-acrylonitrile copolymer and a phenolic resin. Tape 12 irradiated on a reel 11 may be held edgewise to the radiation source, the reel 11 being moved during exposure by wobble cam 17 to avoid " shadows." In a continuous process a wide band of base material is coated with a magnetic particle-binder mix by a fountain roller, the coating is smoothed by a blade, and the particles are aligned by a magnet. The band 19 is then dried and split by knife edges at roller 21 into tapes 22a-22e taken up by reels 26a-26e independently driven on spindle 27 and so arranged that the tapes cross under roller 25 where they receive curing radiation in passing source 24. Suitable radiation sources are X-ray generators, electron accelerators or radioactive elements such as radium and <SP>60</SP>Co. Curing is carried to a stage which gives a compromise between wearability, grip of magnetic particles by the binder, flexibility of the tape and " stick " to recording heads.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US886144XA | 1959-08-26 | 1959-08-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB886144A true GB886144A (en) | 1962-01-03 |
Family
ID=22212388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27812/60A Expired GB886144A (en) | 1959-08-26 | 1960-08-11 | Improvements in and relating to methods of manufacturing magnetic tape |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB886144A (en) |
-
1960
- 1960-08-11 GB GB27812/60A patent/GB886144A/en not_active Expired
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