公开(公告)号：US3620478A

公开(公告)日：1971-11-16

申请号：US3620478D

申请日：1969-08-29

Applicant: IBM

Inventor： FITZGERALD RICHARD J ,  JACOBSEN RONALD R ,  RUEGER WILLIAM J

IPC: G03B23/02 ,  G11B23/027 ,  G11B23/107 ,  G11B23/02 ,  G11B15/66

CPC classification number: G11B23/107 ,  G11B23/027

Abstract: A protective reel cover assembly has a three-position, toggle action, unitary hinge interconnecting the split end portions of a closure ring for a magnetic tape reel cartridge of the type adapted to be mounted for rotation on a tape deck. The hinge body is comprised of three parts hingedly interconnected and being movable to positively lock the cover in a closed position for storage of the cartridge and either one of two open positions in which the cover is expanded to a sufficient extent either to permit independent rotation of the tape reel cartridge or to permit removal or replacement of the tape reel. The cover comprises inner and outer closure ring portions with the inner ring portion snap-fit within the outer ring portion to define an air chamber for the controlled delivery of air to release the leading end of the tape from the tape reel for removal through the cover.