JPS6486318A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS6486318A JPS6486318A JP24267187A JP24267187A JPS6486318A JP S6486318 A JPS6486318 A JP S6486318A JP 24267187 A JP24267187 A JP 24267187A JP 24267187 A JP24267187 A JP 24267187A JP S6486318 A JPS6486318 A JP S6486318A
- Authority
- JP
- Japan
- Prior art keywords
- calender
- uniform
- calender rolls
- rolls
- heating
- 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.)
- Granted
Links
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To provide the titled medium which is uniform in the smoothness in the transverse direction of the surface of a magnetic layer on a base and has uniform surface characteristics by enclosing a calender device by a heating chamber and heating the atmosphere, thereby heating plural calender rolls. CONSTITUTION:The calender device 1 is housed in the heating chamber 16 and the cylindrical calender rolls 3 and drawout rolls 4 are enclosed by a heat insulating member 8. Panel heaters 7 are disposed on the inner side of the heat insulating member 8 and are heated properly to a prescribed temp. The calender rolls 3 are heated from the circumferences thereof, by which the temp. distributions in the axial line directions are uniformized. The increase in the change rate of the outside diameter by the thermal expansion in the central part as compared to the end parts of the calender rolls and the consequent deformation of said part to a crown shape are, therefore, obviated. The magnetic substrate which has the uniform smoothness on the surface of the magnetic layer on the base, is free from wrinkles and has the good surface characteristics is thereby obtd.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242671A JPH0827937B2 (en) | 1987-09-29 | 1987-09-29 | Method of manufacturing magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242671A JPH0827937B2 (en) | 1987-09-29 | 1987-09-29 | Method of manufacturing magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6486318A true JPS6486318A (en) | 1989-03-31 |
JPH0827937B2 JPH0827937B2 (en) | 1996-03-21 |
Family
ID=17092504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62242671A Expired - Lifetime JPH0827937B2 (en) | 1987-09-29 | 1987-09-29 | Method of manufacturing magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0827937B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5930246A (en) * | 1982-08-12 | 1984-02-17 | Fuji Photo Film Co Ltd | Surface smoothing device of magnetic recording medium |
-
1987
- 1987-09-29 JP JP62242671A patent/JPH0827937B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5930246A (en) * | 1982-08-12 | 1984-02-17 | Fuji Photo Film Co Ltd | Surface smoothing device of magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPH0827937B2 (en) | 1996-03-21 |
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Legal Events
Date | Code | Title | Description |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080321 Year of fee payment: 12 |