公开(公告)号：NO783530A

公开(公告)日：1979-04-26

申请号：NO783530

申请日：1978-10-18

Applicant: IBM

Inventor： PORTER HENRY TOWNSEND JR ,  SCHOPP ROBERT ELLSWORTH

IPC: G11B5/82 ,  G11B3/58 ,  G11B17/03 ,  G11B23/00 ,  G11B23/033 ,  G11B23/04 ,  G11B

CPC classification number: G11B3/5827 ,  G11B17/03 ,  G11B23/0035 ,  G11B23/033

公开(公告)号：NO783530L

公开(公告)日：1979-04-26

申请号：NO783530

申请日：1978-10-18

Applicant: IBM

Inventor： PORTER HENRY TOWNSEND JR ,  SCHOPP ROBERT ELLSWORTH

IPC: G11B5/82 ,  G11B3/58 ,  G11B17/03 ,  G11B23/00 ,  G11B23/033 ,  G11B23/04 ,  G11B

Abstract: A thin flexible magnetic disk rotatably disposed in a cartridge of rigid material and protected thereby. The disk is loosely mounted on a driving hub assembly and has an arrow shaped center hole surrounding a central round hub portion of the hub assembly. A drive pin is carried by the hub assembly and extends loosely through a corresponding hole located in the disk and spaced from the center of the hub assembly and located on a radial line preferably of about 90 degrees with respect to a radial line passing through the apex of the straight hole edges forming the arrow so that the disk is automatically centered on the hub assembly due to any restraint on the disk during its rotation.