Title:
MANUFACTURING APPARATUS FOR MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3398856
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable manufacture of highly reliable magnetic recording medium which has reduced change of size and minimizes increase of reproducing image distortion and error rate by change of size by flowing a current to a conductive magnetic layer on a non-magnetic substrate and then conducting heat treatment with Joule's heat.
SOLUTION: The magnetic layer side of a magnetic tape 3 is sent from a feed roll 1 in such a manner that it is in contact with metal rolls 8a, 8b and it is then wound up by a takeup roll 2. In this case, a smaller tensile force of 1gf or loess per 100mm width, for example, is given to the running magnetic tape 3 by adjusting the speed of the feed and takeup rolls 1, 2. Under this condition, when the predetermined voltage is applied across the metal rolls 8a, 8b from a power supply 7, a current which is inversely proportional to an electric resistance flows to the magnetic layer of magnetic tape 3 and thereby the magnetic tape 3 is heated by Joule's heat. As explained above, since the magnetic tape 3 itself is heated, heat efficiency is high and since the stable running of magnetic tape 3 is assured, the manufacturing apparatus can be reduced in size.
Inventors:
Yasuhiro Nishizawa
Application Number:
JP3751597A
Publication Date:
April 21, 2003
Filing Date:
February 21, 1997
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G11B5/84; (IPC1-7): G11B5/84
Domestic Patent References:
| JP8138239A | ||||
| JP2128320A | ||||
| JP7141833A |
Attorney, Agent or Firm:
Kazuhide Okada