Title:
MAGNETIC DISK
Document Type and Number:
Japanese Patent JPS6020373
Kind Code:
A
Abstract:
PURPOSE:To prevent evil influence from being exerted upon a magnetic sheet even if a hub made of plastics deforms according to temperature and humidity condition by using metallic material for a receiving surface where the sheet inner circumferential edge part of one of hub structures having the hub is clamped. CONSTITUTION:The magnetic sheet 6 and the plastics-made hub 7 consisting of the upper and lower hub structures 7a and 7b are provided, and the inner circumferential edge part 6a is clamped between the joint surfaces of both hub structures 7a and 7b. Then, the receiving surface for clamping the sheet inner circumferential edge part 6a of at least one of the upper and lower hub structures 7a and 7b is made of the metallic material 13.
Inventors:
AKAI NORIO
KATOU YOSHITAKE
UMEBAYASHI NOBUHIRO
KATOU YOSHITAKE
UMEBAYASHI NOBUHIRO
Application Number:
JP12813183A
Publication Date:
February 01, 1985
Filing Date:
July 13, 1983
Export Citation:
Assignee:
HITACHI MAXELL
International Classes:
G11B23/00; (IPC1-7): G11B23/033
Domestic Patent References:
| JP59149275B |
Attorney, Agent or Firm:
Oryose Samurai
Previous Patent: An abnormality diagnosis device of an exhaust-air-purification device
Next Patent: JPS6020374
Next Patent: JPS6020374