Disk cartridge with a hub having an outsert molded control ring

Details Disk cartridge with a hub having an outsert molded control ring Disk cartridge with a hub having an outsert molded control ring

1989-04-19

1989-12-05

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

360135, 369290, G11B 2303, G11B 582

Patent

active

048856533

ABSTRACT:
A disk cartridge comprises a case and a disk encased in the case, the disk having a hub comprising a flange of thin metal sheet and a control ring integrated with the flange by outsert molding the control ring from a compound plastic containing 5 to 40% by weight of a filler, and a dimensional ratio of flange plate thickness to control ring inner diameter being 1/50 to 1/30. The hub has a higher plane precision, a higher attrition resistance, and a higher heat resistance.

REFERENCES:
patent: 4366516 (1982-12-01), Ogata et al.
patent: 4616278 (1986-10-01), Yamaguchi et al.
patent: 4630156 (1986-12-01), Saito
patent: 4686666 (1987-08-01), Dieffenbach

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